Adding upstream version 1:4.15.2.upstream/1%4.15.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

155 files changed, 18179 insertions, 1601 deletions

diff --git a/lib/Makefile.am b/lib/Makefile.am
index 3a50b46..22abb97 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -5,57 +5,129 @@ DEFS =
 
 noinst_LTLIBRARIES = libshadow.la
 
+if USE_PAM
+LIBCRYPT_PAM = $(LIBCRYPT)
+else
+LIBCRYPT_PAM =
+endif
+
+AM_CPPFLAGS = -I$(top_srcdir)/lib -I$(top_srcdir) $(ECONF_CPPFLAGS)
+
 libshadow_la_CPPFLAGS = $(ECONF_CPPFLAGS)
 if HAVE_VENDORDIR
 libshadow_la_CPPFLAGS += -DVENDORDIR=\"$(VENDORDIR)\"
 endif
 
 libshadow_la_CPPFLAGS += -I$(top_srcdir)
+libshadow_la_CFLAGS = $(LIBBSD_CFLAGS) $(LIBCRYPT_PAM) $(LIBSYSTEMD)
+libshadow_la_LIBADD = $(LIBADD_DLOPEN)
 
 libshadow_la_SOURCES = \
+	addgrps.c \
+	adds.c \
+	adds.h \
+	age.c \
+	agetpass.c \
+	agetpass.h \
+	alloc.c \
+	alloc.h \
+	atoi/a2i.c \
+	atoi/a2i.h \
+	atoi/str2i.c \
+	atoi/str2i.h \
+	atoi/strtoi.c \
+	atoi/strtoi.h \
+	atoi/strtou_noneg.c \
+	atoi/strtou_noneg.h \
+	attr.h \
+	audit_help.c \
+	basename.c \
+	bit.c \
+	bit.h \
+	cast.h \
+	chkname.c \
+	chkname.h \
+	chowndir.c \
+	chowntty.c \
+	cleanup.c \
+	cleanup_group.c \
+	cleanup_user.c \
 	commonio.c \
 	commonio.h \
+	console.c \
+	copydir.c \
+	csrand.c \
 	defines.h \
 	encrypt.c \
+	env.c \
 	exitcodes.h \
 	faillog.h \
+	failure.c \
+	failure.h \
+	fd.c \
 	fields.c \
+	find_new_gid.c \
+	find_new_uid.c \
+	find_new_sub_gids.c \
+	find_new_sub_uids.c \
 	fputsx.c \
-	getdef.c \
-	getdef.h \
 	get_gid.c \
-	getlong.c \
 	get_pid.c \
 	get_uid.c \
-	getulong.c \
+	getdate.h \
+	getdate.y \
+	getdef.c \
+	getdef.h \
+	getgr_nam_gid.c \
+	getrange.c \
+	gettime.c \
 	groupio.c \
 	groupmem.c \
 	groupio.h \
 	gshadow.c \
+	hushed.c \
+	idmapping.h \
+	idmapping.c \
+	isexpired.c \
+	limits.c \
+	list.c \
 	lockpw.c \
+	loginprompt.c \
+	mail.c \
+	memzero.c \
+	memzero.h \
+	motd.c \
+	must_be.h \
+	myname.c \
 	nss.c \
 	nscd.c \
 	nscd.h \
-	shadowlog.c \
-	shadowlog.h \
-	shadowlog_internal.h \
-	sssd.c \
-	sssd.h \
+	obscure.c \
 	pam_defs.h \
+	pam_pass.c \
+	pam_pass_non_interactive.c \
 	port.c \
 	port.h \
+	prefix_flag.c \
 	prototypes.h \
 	pwauth.c \
 	pwauth.h \
 	pwio.c \
 	pwio.h \
+	pwd_init.c \
+	pwd2spwd.c \
+	pwdcheck.c \
 	pwmem.c \
+	remove_tree.c \
+	rlogin.c \
+	root_flag.c \
 	run_part.h \
 	run_part.c \
-	subordinateio.h \
-	subordinateio.c \
+	salt.c \
 	selinux.c \
 	semanage.c \
+	setugid.c \
+	setupenv.c \
 	sgetgrent.c \
 	sgetpwent.c \
 	sgetspent.c \
@@ -64,14 +136,74 @@ libshadow_la_SOURCES = \
 	shadow.c \
 	shadowio.c \
 	shadowio.h \
+	shadowlog.c \
+	shadowlog.h \
+	shadowlog_internal.h \
 	shadowmem.c \
+	shell.c \
+	sizeof.h \
 	spawn.c \
-	utent.c
+	sssd.c \
+	sssd.h \
+	string/sprintf.c \
+	string/sprintf.h \
+	string/stpecpy.c \
+	string/stpecpy.h \
+	string/stpeprintf.c \
+	string/stpeprintf.h \
+	string/strftime.c \
+	string/strftime.h \
+	string/strncpy.h \
+	string/strtcpy.c \
+	string/strtcpy.h \
+	string/zustr2stp.h \
+	strtoday.c \
+	sub.c \
+	subordinateio.h \
+	subordinateio.c \
+	sulog.c \
+	time/day_to_str.c \
+	time/day_to_str.h \
+	ttytype.c \
+	tz.c \
+	ulimit.c \
+	user_busy.c \
+	valid.c \
+	write_full.c \
+	xgetpwnam.c \
+	xprefix_getpwnam.c \
+	xgetpwuid.c \
+	xgetgrnam.c \
+	xgetgrgid.c \
+	xgetspnam.c \
+	yesno.c
 
 if WITH_TCB
 libshadow_la_SOURCES += tcbfuncs.c tcbfuncs.h
 endif
 
+if WITH_BTRFS
+libshadow_la_SOURCES += btrfs.c
+endif
+
+if ENABLE_LASTLOG
+libshadow_la_SOURCES += log.c
+endif
+
+if ENABLE_LOGIND
+libshadow_la_SOURCES += logind.c
+else
+libshadow_la_SOURCES += utmp.c
+endif
+
+if !WITH_LIBBSD
+libshadow_la_SOURCES += \
+	freezero.h \
+	freezero.c \
+	readpassphrase.h \
+	readpassphrase.c
+endif
+
 # These files are unneeded for some reason, listed in
 # order of appearance:
 #
@@ -79,4 +211,5 @@ endif
 
 EXTRA_DIST = \
 	.indent.pro \
-	gshadow_.h
+	gshadow_.h \
+	xgetXXbyYY.c
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 9eef01c..1b4f0fe 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -90,6 +90,16 @@ build_triplet = @build@
 host_triplet = @host@
 @HAVE_VENDORDIR_TRUE@am__append_1 = -DVENDORDIR=\"$(VENDORDIR)\"
 @WITH_TCB_TRUE@am__append_2 = tcbfuncs.c tcbfuncs.h
+@WITH_BTRFS_TRUE@am__append_3 = btrfs.c
+@ENABLE_LASTLOG_TRUE@am__append_4 = log.c
+@ENABLE_LOGIND_TRUE@am__append_5 = logind.c
+@ENABLE_LOGIND_FALSE@am__append_6 = utmp.c
+@WITH_LIBBSD_FALSE@am__append_7 = \
+@WITH_LIBBSD_FALSE@	freezero.h \
+@WITH_LIBBSD_FALSE@	freezero.c \
+@WITH_LIBBSD_FALSE@	readpassphrase.h \
+@WITH_LIBBSD_FALSE@	readpassphrase.c
+
 subdir = lib
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/m4/gettext.m4 \
@@ -109,41 +119,116 @@ CONFIG_HEADER = $(top_builddir)/config.h
 CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
 LTLIBRARIES = $(noinst_LTLIBRARIES)
-libshadow_la_LIBADD =
-am__libshadow_la_SOURCES_DIST = commonio.c commonio.h defines.h \
-	encrypt.c exitcodes.h faillog.h fields.c fputsx.c getdef.c \
-	getdef.h get_gid.c getlong.c get_pid.c get_uid.c getulong.c \
-	groupio.c groupmem.c groupio.h gshadow.c lockpw.c nss.c nscd.c \
-	nscd.h shadowlog.c shadowlog.h shadowlog_internal.h sssd.c \
-	sssd.h pam_defs.h port.c port.h prototypes.h pwauth.c pwauth.h \
-	pwio.c pwio.h pwmem.c run_part.h run_part.c subordinateio.h \
-	subordinateio.c selinux.c semanage.c sgetgrent.c sgetpwent.c \
+am__DEPENDENCIES_1 =
+libshadow_la_DEPENDENCIES = $(am__DEPENDENCIES_1)
+am__libshadow_la_SOURCES_DIST = addgrps.c adds.c adds.h age.c \
+	agetpass.c agetpass.h alloc.c alloc.h atoi/a2i.c atoi/a2i.h \
+	atoi/str2i.c atoi/str2i.h atoi/strtoi.c atoi/strtoi.h \
+	atoi/strtou_noneg.c atoi/strtou_noneg.h attr.h audit_help.c \
+	basename.c bit.c bit.h cast.h chkname.c chkname.h chowndir.c \
+	chowntty.c cleanup.c cleanup_group.c cleanup_user.c commonio.c \
+	commonio.h console.c copydir.c csrand.c defines.h encrypt.c \
+	env.c exitcodes.h faillog.h failure.c failure.h fd.c fields.c \
+	find_new_gid.c find_new_uid.c find_new_sub_gids.c \
+	find_new_sub_uids.c fputsx.c get_gid.c get_pid.c get_uid.c \
+	getdate.h getdate.y getdef.c getdef.h getgr_nam_gid.c \
+	getrange.c gettime.c groupio.c groupmem.c groupio.h gshadow.c \
+	hushed.c idmapping.h idmapping.c isexpired.c limits.c list.c \
+	lockpw.c loginprompt.c mail.c memzero.c memzero.h motd.c \
+	must_be.h myname.c nss.c nscd.c nscd.h obscure.c pam_defs.h \
+	pam_pass.c pam_pass_non_interactive.c port.c port.h \
+	prefix_flag.c prototypes.h pwauth.c pwauth.h pwio.c pwio.h \
+	pwd_init.c pwd2spwd.c pwdcheck.c pwmem.c remove_tree.c \
+	rlogin.c root_flag.c run_part.h run_part.c salt.c selinux.c \
+	semanage.c setugid.c setupenv.c sgetgrent.c sgetpwent.c \
 	sgetspent.c sgroupio.c sgroupio.h shadow.c shadowio.c \
-	shadowio.h shadowmem.c spawn.c utent.c tcbfuncs.c tcbfuncs.h
+	shadowio.h shadowlog.c shadowlog.h shadowlog_internal.h \
+	shadowmem.c shell.c sizeof.h spawn.c sssd.c sssd.h \
+	string/sprintf.c string/sprintf.h string/stpecpy.c \
+	string/stpecpy.h string/stpeprintf.c string/stpeprintf.h \
+	string/strftime.c string/strftime.h string/strncpy.h \
+	string/strtcpy.c string/strtcpy.h string/zustr2stp.h \
+	strtoday.c sub.c subordinateio.h subordinateio.c sulog.c \
+	time/day_to_str.c time/day_to_str.h ttytype.c tz.c ulimit.c \
+	user_busy.c valid.c write_full.c xgetpwnam.c \
+	xprefix_getpwnam.c xgetpwuid.c xgetgrnam.c xgetgrgid.c \
+	xgetspnam.c yesno.c tcbfuncs.c tcbfuncs.h btrfs.c log.c \
+	logind.c utmp.c freezero.h freezero.c readpassphrase.h \
+	readpassphrase.c
+am__dirstamp = $(am__leading_dot)dirstamp
 @WITH_TCB_TRUE@am__objects_1 = libshadow_la-tcbfuncs.lo
-am_libshadow_la_OBJECTS = libshadow_la-commonio.lo \
-	libshadow_la-encrypt.lo libshadow_la-fields.lo \
-	libshadow_la-fputsx.lo libshadow_la-getdef.lo \
-	libshadow_la-get_gid.lo libshadow_la-getlong.lo \
-	libshadow_la-get_pid.lo libshadow_la-get_uid.lo \
-	libshadow_la-getulong.lo libshadow_la-groupio.lo \
-	libshadow_la-groupmem.lo libshadow_la-gshadow.lo \
-	libshadow_la-lockpw.lo libshadow_la-nss.lo \
-	libshadow_la-nscd.lo libshadow_la-shadowlog.lo \
-	libshadow_la-sssd.lo libshadow_la-port.lo \
-	libshadow_la-pwauth.lo libshadow_la-pwio.lo \
-	libshadow_la-pwmem.lo libshadow_la-run_part.lo \
-	libshadow_la-subordinateio.lo libshadow_la-selinux.lo \
-	libshadow_la-semanage.lo libshadow_la-sgetgrent.lo \
-	libshadow_la-sgetpwent.lo libshadow_la-sgetspent.lo \
-	libshadow_la-sgroupio.lo libshadow_la-shadow.lo \
-	libshadow_la-shadowio.lo libshadow_la-shadowmem.lo \
-	libshadow_la-spawn.lo libshadow_la-utent.lo $(am__objects_1)
+@WITH_BTRFS_TRUE@am__objects_2 = libshadow_la-btrfs.lo
+@ENABLE_LASTLOG_TRUE@am__objects_3 = libshadow_la-log.lo
+@ENABLE_LOGIND_TRUE@am__objects_4 = libshadow_la-logind.lo
+@ENABLE_LOGIND_FALSE@am__objects_5 = libshadow_la-utmp.lo
+@WITH_LIBBSD_FALSE@am__objects_6 = libshadow_la-freezero.lo \
+@WITH_LIBBSD_FALSE@	libshadow_la-readpassphrase.lo
+am_libshadow_la_OBJECTS = libshadow_la-addgrps.lo libshadow_la-adds.lo \
+	libshadow_la-age.lo libshadow_la-agetpass.lo \
+	libshadow_la-alloc.lo atoi/libshadow_la-a2i.lo \
+	atoi/libshadow_la-str2i.lo atoi/libshadow_la-strtoi.lo \
+	atoi/libshadow_la-strtou_noneg.lo libshadow_la-audit_help.lo \
+	libshadow_la-basename.lo libshadow_la-bit.lo \
+	libshadow_la-chkname.lo libshadow_la-chowndir.lo \
+	libshadow_la-chowntty.lo libshadow_la-cleanup.lo \
+	libshadow_la-cleanup_group.lo libshadow_la-cleanup_user.lo \
+	libshadow_la-commonio.lo libshadow_la-console.lo \
+	libshadow_la-copydir.lo libshadow_la-csrand.lo \
+	libshadow_la-encrypt.lo libshadow_la-env.lo \
+	libshadow_la-failure.lo libshadow_la-fd.lo \
+	libshadow_la-fields.lo libshadow_la-find_new_gid.lo \
+	libshadow_la-find_new_uid.lo libshadow_la-find_new_sub_gids.lo \
+	libshadow_la-find_new_sub_uids.lo libshadow_la-fputsx.lo \
+	libshadow_la-get_gid.lo libshadow_la-get_pid.lo \
+	libshadow_la-get_uid.lo libshadow_la-getdate.lo \
+	libshadow_la-getdef.lo libshadow_la-getgr_nam_gid.lo \
+	libshadow_la-getrange.lo libshadow_la-gettime.lo \
+	libshadow_la-groupio.lo libshadow_la-groupmem.lo \
+	libshadow_la-gshadow.lo libshadow_la-hushed.lo \
+	libshadow_la-idmapping.lo libshadow_la-isexpired.lo \
+	libshadow_la-limits.lo libshadow_la-list.lo \
+	libshadow_la-lockpw.lo libshadow_la-loginprompt.lo \
+	libshadow_la-mail.lo libshadow_la-memzero.lo \
+	libshadow_la-motd.lo libshadow_la-myname.lo \
+	libshadow_la-nss.lo libshadow_la-nscd.lo \
+	libshadow_la-obscure.lo libshadow_la-pam_pass.lo \
+	libshadow_la-pam_pass_non_interactive.lo libshadow_la-port.lo \
+	libshadow_la-prefix_flag.lo libshadow_la-pwauth.lo \
+	libshadow_la-pwio.lo libshadow_la-pwd_init.lo \
+	libshadow_la-pwd2spwd.lo libshadow_la-pwdcheck.lo \
+	libshadow_la-pwmem.lo libshadow_la-remove_tree.lo \
+	libshadow_la-rlogin.lo libshadow_la-root_flag.lo \
+	libshadow_la-run_part.lo libshadow_la-salt.lo \
+	libshadow_la-selinux.lo libshadow_la-semanage.lo \
+	libshadow_la-setugid.lo libshadow_la-setupenv.lo \
+	libshadow_la-sgetgrent.lo libshadow_la-sgetpwent.lo \
+	libshadow_la-sgetspent.lo libshadow_la-sgroupio.lo \
+	libshadow_la-shadow.lo libshadow_la-shadowio.lo \
+	libshadow_la-shadowlog.lo libshadow_la-shadowmem.lo \
+	libshadow_la-shell.lo libshadow_la-spawn.lo \
+	libshadow_la-sssd.lo string/libshadow_la-sprintf.lo \
+	string/libshadow_la-stpecpy.lo \
+	string/libshadow_la-stpeprintf.lo \
+	string/libshadow_la-strftime.lo string/libshadow_la-strtcpy.lo \
+	libshadow_la-strtoday.lo libshadow_la-sub.lo \
+	libshadow_la-subordinateio.lo libshadow_la-sulog.lo \
+	time/libshadow_la-day_to_str.lo libshadow_la-ttytype.lo \
+	libshadow_la-tz.lo libshadow_la-ulimit.lo \
+	libshadow_la-user_busy.lo libshadow_la-valid.lo \
+	libshadow_la-write_full.lo libshadow_la-xgetpwnam.lo \
+	libshadow_la-xprefix_getpwnam.lo libshadow_la-xgetpwuid.lo \
+	libshadow_la-xgetgrnam.lo libshadow_la-xgetgrgid.lo \
+	libshadow_la-xgetspnam.lo libshadow_la-yesno.lo \
+	$(am__objects_1) $(am__objects_2) $(am__objects_3) \
+	$(am__objects_4) $(am__objects_5) $(am__objects_6)
 libshadow_la_OBJECTS = $(am_libshadow_la_OBJECTS)
 AM_V_lt = $(am__v_lt_@AM_V@)
 am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
 am__v_lt_0 = --silent
 am__v_lt_1 = 
+libshadow_la_LINK = $(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=link $(CCLD) $(libshadow_la_CFLAGS) \
+	$(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
 AM_V_P = $(am__v_P_@AM_V@)
 am__v_P_ = $(am__v_P_@AM_DEFAULT_V@)
 am__v_P_0 = false
@@ -159,29 +244,83 @@ am__v_at_1 =
 DEFAULT_INCLUDES = -I.@am__isrc@ -I$(top_builddir)
 depcomp = $(SHELL) $(top_srcdir)/depcomp
 am__maybe_remake_depfiles = depfiles
-am__depfiles_remade = ./$(DEPDIR)/libshadow_la-commonio.Plo \
+am__depfiles_remade = ./$(DEPDIR)/libshadow_la-addgrps.Plo \
+	./$(DEPDIR)/libshadow_la-adds.Plo \
+	./$(DEPDIR)/libshadow_la-age.Plo \
+	./$(DEPDIR)/libshadow_la-agetpass.Plo \
+	./$(DEPDIR)/libshadow_la-alloc.Plo \
+	./$(DEPDIR)/libshadow_la-audit_help.Plo \
+	./$(DEPDIR)/libshadow_la-basename.Plo \
+	./$(DEPDIR)/libshadow_la-bit.Plo \
+	./$(DEPDIR)/libshadow_la-btrfs.Plo \
+	./$(DEPDIR)/libshadow_la-chkname.Plo \
+	./$(DEPDIR)/libshadow_la-chowndir.Plo \
+	./$(DEPDIR)/libshadow_la-chowntty.Plo \
+	./$(DEPDIR)/libshadow_la-cleanup.Plo \
+	./$(DEPDIR)/libshadow_la-cleanup_group.Plo \
+	./$(DEPDIR)/libshadow_la-cleanup_user.Plo \
+	./$(DEPDIR)/libshadow_la-commonio.Plo \
+	./$(DEPDIR)/libshadow_la-console.Plo \
+	./$(DEPDIR)/libshadow_la-copydir.Plo \
+	./$(DEPDIR)/libshadow_la-csrand.Plo \
 	./$(DEPDIR)/libshadow_la-encrypt.Plo \
+	./$(DEPDIR)/libshadow_la-env.Plo \
+	./$(DEPDIR)/libshadow_la-failure.Plo \
+	./$(DEPDIR)/libshadow_la-fd.Plo \
 	./$(DEPDIR)/libshadow_la-fields.Plo \
+	./$(DEPDIR)/libshadow_la-find_new_gid.Plo \
+	./$(DEPDIR)/libshadow_la-find_new_sub_gids.Plo \
+	./$(DEPDIR)/libshadow_la-find_new_sub_uids.Plo \
+	./$(DEPDIR)/libshadow_la-find_new_uid.Plo \
 	./$(DEPDIR)/libshadow_la-fputsx.Plo \
+	./$(DEPDIR)/libshadow_la-freezero.Plo \
 	./$(DEPDIR)/libshadow_la-get_gid.Plo \
 	./$(DEPDIR)/libshadow_la-get_pid.Plo \
 	./$(DEPDIR)/libshadow_la-get_uid.Plo \
+	./$(DEPDIR)/libshadow_la-getdate.Plo \
 	./$(DEPDIR)/libshadow_la-getdef.Plo \
-	./$(DEPDIR)/libshadow_la-getlong.Plo \
-	./$(DEPDIR)/libshadow_la-getulong.Plo \
+	./$(DEPDIR)/libshadow_la-getgr_nam_gid.Plo \
+	./$(DEPDIR)/libshadow_la-getrange.Plo \
+	./$(DEPDIR)/libshadow_la-gettime.Plo \
 	./$(DEPDIR)/libshadow_la-groupio.Plo \
 	./$(DEPDIR)/libshadow_la-groupmem.Plo \
 	./$(DEPDIR)/libshadow_la-gshadow.Plo \
+	./$(DEPDIR)/libshadow_la-hushed.Plo \
+	./$(DEPDIR)/libshadow_la-idmapping.Plo \
+	./$(DEPDIR)/libshadow_la-isexpired.Plo \
+	./$(DEPDIR)/libshadow_la-limits.Plo \
+	./$(DEPDIR)/libshadow_la-list.Plo \
 	./$(DEPDIR)/libshadow_la-lockpw.Plo \
+	./$(DEPDIR)/libshadow_la-log.Plo \
+	./$(DEPDIR)/libshadow_la-logind.Plo \
+	./$(DEPDIR)/libshadow_la-loginprompt.Plo \
+	./$(DEPDIR)/libshadow_la-mail.Plo \
+	./$(DEPDIR)/libshadow_la-memzero.Plo \
+	./$(DEPDIR)/libshadow_la-motd.Plo \
+	./$(DEPDIR)/libshadow_la-myname.Plo \
 	./$(DEPDIR)/libshadow_la-nscd.Plo \
 	./$(DEPDIR)/libshadow_la-nss.Plo \
+	./$(DEPDIR)/libshadow_la-obscure.Plo \
+	./$(DEPDIR)/libshadow_la-pam_pass.Plo \
+	./$(DEPDIR)/libshadow_la-pam_pass_non_interactive.Plo \
 	./$(DEPDIR)/libshadow_la-port.Plo \
+	./$(DEPDIR)/libshadow_la-prefix_flag.Plo \
 	./$(DEPDIR)/libshadow_la-pwauth.Plo \
+	./$(DEPDIR)/libshadow_la-pwd2spwd.Plo \
+	./$(DEPDIR)/libshadow_la-pwd_init.Plo \
+	./$(DEPDIR)/libshadow_la-pwdcheck.Plo \
 	./$(DEPDIR)/libshadow_la-pwio.Plo \
 	./$(DEPDIR)/libshadow_la-pwmem.Plo \
+	./$(DEPDIR)/libshadow_la-readpassphrase.Plo \
+	./$(DEPDIR)/libshadow_la-remove_tree.Plo \
+	./$(DEPDIR)/libshadow_la-rlogin.Plo \
+	./$(DEPDIR)/libshadow_la-root_flag.Plo \
 	./$(DEPDIR)/libshadow_la-run_part.Plo \
+	./$(DEPDIR)/libshadow_la-salt.Plo \
 	./$(DEPDIR)/libshadow_la-selinux.Plo \
 	./$(DEPDIR)/libshadow_la-semanage.Plo \
+	./$(DEPDIR)/libshadow_la-setugid.Plo \
+	./$(DEPDIR)/libshadow_la-setupenv.Plo \
 	./$(DEPDIR)/libshadow_la-sgetgrent.Plo \
 	./$(DEPDIR)/libshadow_la-sgetpwent.Plo \
 	./$(DEPDIR)/libshadow_la-sgetspent.Plo \
@@ -190,11 +329,38 @@ am__depfiles_remade = ./$(DEPDIR)/libshadow_la-commonio.Plo \
 	./$(DEPDIR)/libshadow_la-shadowio.Plo \
 	./$(DEPDIR)/libshadow_la-shadowlog.Plo \
 	./$(DEPDIR)/libshadow_la-shadowmem.Plo \
+	./$(DEPDIR)/libshadow_la-shell.Plo \
 	./$(DEPDIR)/libshadow_la-spawn.Plo \
 	./$(DEPDIR)/libshadow_la-sssd.Plo \
+	./$(DEPDIR)/libshadow_la-strtoday.Plo \
+	./$(DEPDIR)/libshadow_la-sub.Plo \
 	./$(DEPDIR)/libshadow_la-subordinateio.Plo \
+	./$(DEPDIR)/libshadow_la-sulog.Plo \
 	./$(DEPDIR)/libshadow_la-tcbfuncs.Plo \
-	./$(DEPDIR)/libshadow_la-utent.Plo
+	./$(DEPDIR)/libshadow_la-ttytype.Plo \
+	./$(DEPDIR)/libshadow_la-tz.Plo \
+	./$(DEPDIR)/libshadow_la-ulimit.Plo \
+	./$(DEPDIR)/libshadow_la-user_busy.Plo \
+	./$(DEPDIR)/libshadow_la-utmp.Plo \
+	./$(DEPDIR)/libshadow_la-valid.Plo \
+	./$(DEPDIR)/libshadow_la-write_full.Plo \
+	./$(DEPDIR)/libshadow_la-xgetgrgid.Plo \
+	./$(DEPDIR)/libshadow_la-xgetgrnam.Plo \
+	./$(DEPDIR)/libshadow_la-xgetpwnam.Plo \
+	./$(DEPDIR)/libshadow_la-xgetpwuid.Plo \
+	./$(DEPDIR)/libshadow_la-xgetspnam.Plo \
+	./$(DEPDIR)/libshadow_la-xprefix_getpwnam.Plo \
+	./$(DEPDIR)/libshadow_la-yesno.Plo \
+	atoi/$(DEPDIR)/libshadow_la-a2i.Plo \
+	atoi/$(DEPDIR)/libshadow_la-str2i.Plo \
+	atoi/$(DEPDIR)/libshadow_la-strtoi.Plo \
+	atoi/$(DEPDIR)/libshadow_la-strtou_noneg.Plo \
+	string/$(DEPDIR)/libshadow_la-sprintf.Plo \
+	string/$(DEPDIR)/libshadow_la-stpecpy.Plo \
+	string/$(DEPDIR)/libshadow_la-stpeprintf.Plo \
+	string/$(DEPDIR)/libshadow_la-strftime.Plo \
+	string/$(DEPDIR)/libshadow_la-strtcpy.Plo \
+	time/$(DEPDIR)/libshadow_la-day_to_str.Plo
 am__mv = mv -f
 COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
@@ -214,6 +380,17 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
+@MAINTAINER_MODE_FALSE@am__skipyacc = test -f $@ ||
+am__yacc_c2h = sed -e s/cc$$/hh/ -e s/cpp$$/hpp/ -e s/cxx$$/hxx/ \
+		   -e s/c++$$/h++/ -e s/c$$/h/
+YACCCOMPILE = $(YACC) $(AM_YFLAGS) $(YFLAGS)
+LTYACCCOMPILE = $(LIBTOOL) $(AM_V_lt) $(AM_LIBTOOLFLAGS) \
+	$(LIBTOOLFLAGS) --mode=compile $(YACC) $(AM_YFLAGS) $(YFLAGS)
+AM_V_YACC = $(am__v_YACC_@AM_V@)
+am__v_YACC_ = $(am__v_YACC_@AM_DEFAULT_V@)
+am__v_YACC_0 = @echo "  YACC    " $@;
+am__v_YACC_1 = 
+YLWRAP = $(top_srcdir)/ylwrap
 SOURCES = $(libshadow_la_SOURCES)
 DIST_SOURCES = $(am__libshadow_la_SOURCES_DIST)
 am__can_run_installinfo = \
@@ -238,7 +415,8 @@ am__define_uniq_tagged_files = \
   unique=`for i in $$list; do \
     if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
   done | $(am__uniquify_input)`
-am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/depcomp
+am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/depcomp \
+	$(top_srcdir)/ylwrap getdate.c
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 ACLOCAL = @ACLOCAL@
 AMTAR = @AMTAR@
@@ -251,6 +429,8 @@ AWK = @AWK@
 CC = @CC@
 CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
+CMOCKA_CFLAGS = @CMOCKA_CFLAGS@
+CMOCKA_LIBS = @CMOCKA_LIBS@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CSCOPE = @CSCOPE@
@@ -269,6 +449,7 @@ EGREP = @EGREP@
 ETAGS = @ETAGS@
 EXEEXT = @EXEEXT@
 FGREP = @FGREP@
+FILECMD = @FILECMD@
 GETTEXT_MACRO_VERSION = @GETTEXT_MACRO_VERSION@
 GMSGFMT = @GMSGFMT@
 GMSGFMT_015 = @GMSGFMT_015@
@@ -284,9 +465,15 @@ INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
 LD = @LD@
 LDFLAGS = @LDFLAGS@
 LIBACL = @LIBACL@
+LIBADD_DL = @LIBADD_DL@
+LIBADD_DLD_LINK = @LIBADD_DLD_LINK@
+LIBADD_DLOPEN = @LIBADD_DLOPEN@
+LIBADD_SHL_LOAD = @LIBADD_SHL_LOAD@
 LIBATTR = @LIBATTR@
 LIBAUDIT = @LIBAUDIT@
-LIBCRACK = @LIBCRACK@
+LIBBSD = @LIBBSD@
+LIBBSD_CFLAGS = @LIBBSD_CFLAGS@
+LIBBSD_LIBS = @LIBBSD_LIBS@
 LIBCRYPT = @LIBCRYPT@
 LIBECONF = @LIBECONF@
 LIBICONV = @LIBICONV@
@@ -302,6 +489,7 @@ LIBSUBID_ABI = @LIBSUBID_ABI@
 LIBSUBID_ABI_MAJOR = @LIBSUBID_ABI_MAJOR@
 LIBSUBID_ABI_MICRO = @LIBSUBID_ABI_MICRO@
 LIBSUBID_ABI_MINOR = @LIBSUBID_ABI_MINOR@
+LIBSYSTEMD = @LIBSYSTEMD@
 LIBTCB = @LIBTCB@
 LIBTOOL = @LIBTOOL@
 LIPO = @LIPO@
@@ -310,6 +498,8 @@ LN_S = @LN_S@
 LTLIBICONV = @LTLIBICONV@
 LTLIBINTL = @LTLIBINTL@
 LTLIBOBJS = @LTLIBOBJS@
+LT_DLLOADERS = @LT_DLLOADERS@
+LT_DLPREOPEN = @LT_DLPREOPEN@
 LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
 MAINT = @MAINT@
 MAKEINFO = @MAKEINFO@
@@ -332,6 +522,9 @@ PACKAGE_TARNAME = @PACKAGE_TARNAME@
 PACKAGE_URL = @PACKAGE_URL@
 PACKAGE_VERSION = @PACKAGE_VERSION@
 PATH_SEPARATOR = @PATH_SEPARATOR@
+PKG_CONFIG = @PKG_CONFIG@
+PKG_CONFIG_LIBDIR = @PKG_CONFIG_LIBDIR@
+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
 POSUB = @POSUB@
 RANLIB = @RANLIB@
 SED = @SED@
@@ -405,18 +598,46 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = 1.0 foreign
 noinst_LTLIBRARIES = libshadow.la
+@USE_PAM_FALSE@LIBCRYPT_PAM = 
+@USE_PAM_TRUE@LIBCRYPT_PAM = $(LIBCRYPT)
+AM_CPPFLAGS = -I$(top_srcdir)/lib -I$(top_srcdir) $(ECONF_CPPFLAGS)
 libshadow_la_CPPFLAGS = $(ECONF_CPPFLAGS) $(am__append_1) \
 	-I$(top_srcdir)
-libshadow_la_SOURCES = commonio.c commonio.h defines.h encrypt.c \
-	exitcodes.h faillog.h fields.c fputsx.c getdef.c getdef.h \
-	get_gid.c getlong.c get_pid.c get_uid.c getulong.c groupio.c \
-	groupmem.c groupio.h gshadow.c lockpw.c nss.c nscd.c nscd.h \
-	shadowlog.c shadowlog.h shadowlog_internal.h sssd.c sssd.h \
-	pam_defs.h port.c port.h prototypes.h pwauth.c pwauth.h pwio.c \
-	pwio.h pwmem.c run_part.h run_part.c subordinateio.h \
-	subordinateio.c selinux.c semanage.c sgetgrent.c sgetpwent.c \
-	sgetspent.c sgroupio.c sgroupio.h shadow.c shadowio.c \
-	shadowio.h shadowmem.c spawn.c utent.c $(am__append_2)
+libshadow_la_CFLAGS = $(LIBBSD_CFLAGS) $(LIBCRYPT_PAM) $(LIBSYSTEMD)
+libshadow_la_LIBADD = $(LIBADD_DLOPEN)
+libshadow_la_SOURCES = addgrps.c adds.c adds.h age.c agetpass.c \
+	agetpass.h alloc.c alloc.h atoi/a2i.c atoi/a2i.h atoi/str2i.c \
+	atoi/str2i.h atoi/strtoi.c atoi/strtoi.h atoi/strtou_noneg.c \
+	atoi/strtou_noneg.h attr.h audit_help.c basename.c bit.c bit.h \
+	cast.h chkname.c chkname.h chowndir.c chowntty.c cleanup.c \
+	cleanup_group.c cleanup_user.c commonio.c commonio.h console.c \
+	copydir.c csrand.c defines.h encrypt.c env.c exitcodes.h \
+	faillog.h failure.c failure.h fd.c fields.c find_new_gid.c \
+	find_new_uid.c find_new_sub_gids.c find_new_sub_uids.c \
+	fputsx.c get_gid.c get_pid.c get_uid.c getdate.h getdate.y \
+	getdef.c getdef.h getgr_nam_gid.c getrange.c gettime.c \
+	groupio.c groupmem.c groupio.h gshadow.c hushed.c idmapping.h \
+	idmapping.c isexpired.c limits.c list.c lockpw.c loginprompt.c \
+	mail.c memzero.c memzero.h motd.c must_be.h myname.c nss.c \
+	nscd.c nscd.h obscure.c pam_defs.h pam_pass.c \
+	pam_pass_non_interactive.c port.c port.h prefix_flag.c \
+	prototypes.h pwauth.c pwauth.h pwio.c pwio.h pwd_init.c \
+	pwd2spwd.c pwdcheck.c pwmem.c remove_tree.c rlogin.c \
+	root_flag.c run_part.h run_part.c salt.c selinux.c semanage.c \
+	setugid.c setupenv.c sgetgrent.c sgetpwent.c sgetspent.c \
+	sgroupio.c sgroupio.h shadow.c shadowio.c shadowio.h \
+	shadowlog.c shadowlog.h shadowlog_internal.h shadowmem.c \
+	shell.c sizeof.h spawn.c sssd.c sssd.h string/sprintf.c \
+	string/sprintf.h string/stpecpy.c string/stpecpy.h \
+	string/stpeprintf.c string/stpeprintf.h string/strftime.c \
+	string/strftime.h string/strncpy.h string/strtcpy.c \
+	string/strtcpy.h string/zustr2stp.h strtoday.c sub.c \
+	subordinateio.h subordinateio.c sulog.c time/day_to_str.c \
+	time/day_to_str.h ttytype.c tz.c ulimit.c user_busy.c valid.c \
+	write_full.c xgetpwnam.c xprefix_getpwnam.c xgetpwuid.c \
+	xgetgrnam.c xgetgrgid.c xgetspnam.c yesno.c $(am__append_2) \
+	$(am__append_3) $(am__append_4) $(am__append_5) \
+	$(am__append_6) $(am__append_7)
 
 # These files are unneeded for some reason, listed in
 # order of appearance:
@@ -424,12 +645,13 @@ libshadow_la_SOURCES = commonio.c commonio.h defines.h encrypt.c \
 # sources for dbm support (not yet used)
 EXTRA_DIST = \
 	.indent.pro \
-	gshadow_.h
+	gshadow_.h \
+	xgetXXbyYY.c
 
 all: all-am
 
 .SUFFIXES:
-.SUFFIXES: .c .lo .o .obj
+.SUFFIXES: .c .lo .o .obj .y
 $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
 	@for dep in $?; do \
 	  case '$(am__configure_deps)' in \
@@ -470,39 +692,137 @@ clean-noinstLTLIBRARIES:
 	  echo rm -f $${locs}; \
 	  rm -f $${locs}; \
 	}
+atoi/$(am__dirstamp):
+	@$(MKDIR_P) atoi
+	@: > atoi/$(am__dirstamp)
+atoi/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) atoi/$(DEPDIR)
+	@: > atoi/$(DEPDIR)/$(am__dirstamp)
+atoi/libshadow_la-a2i.lo: atoi/$(am__dirstamp) \
+	atoi/$(DEPDIR)/$(am__dirstamp)
+atoi/libshadow_la-str2i.lo: atoi/$(am__dirstamp) \
+	atoi/$(DEPDIR)/$(am__dirstamp)
+atoi/libshadow_la-strtoi.lo: atoi/$(am__dirstamp) \
+	atoi/$(DEPDIR)/$(am__dirstamp)
+atoi/libshadow_la-strtou_noneg.lo: atoi/$(am__dirstamp) \
+	atoi/$(DEPDIR)/$(am__dirstamp)
+string/$(am__dirstamp):
+	@$(MKDIR_P) string
+	@: > string/$(am__dirstamp)
+string/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) string/$(DEPDIR)
+	@: > string/$(DEPDIR)/$(am__dirstamp)
+string/libshadow_la-sprintf.lo: string/$(am__dirstamp) \
+	string/$(DEPDIR)/$(am__dirstamp)
+string/libshadow_la-stpecpy.lo: string/$(am__dirstamp) \
+	string/$(DEPDIR)/$(am__dirstamp)
+string/libshadow_la-stpeprintf.lo: string/$(am__dirstamp) \
+	string/$(DEPDIR)/$(am__dirstamp)
+string/libshadow_la-strftime.lo: string/$(am__dirstamp) \
+	string/$(DEPDIR)/$(am__dirstamp)
+string/libshadow_la-strtcpy.lo: string/$(am__dirstamp) \
+	string/$(DEPDIR)/$(am__dirstamp)
+time/$(am__dirstamp):
+	@$(MKDIR_P) time
+	@: > time/$(am__dirstamp)
+time/$(DEPDIR)/$(am__dirstamp):
+	@$(MKDIR_P) time/$(DEPDIR)
+	@: > time/$(DEPDIR)/$(am__dirstamp)
+time/libshadow_la-day_to_str.lo: time/$(am__dirstamp) \
+	time/$(DEPDIR)/$(am__dirstamp)
 
 libshadow.la: $(libshadow_la_OBJECTS) $(libshadow_la_DEPENDENCIES) $(EXTRA_libshadow_la_DEPENDENCIES) 
-	$(AM_V_CCLD)$(LINK)  $(libshadow_la_OBJECTS) $(libshadow_la_LIBADD) $(LIBS)
+	$(AM_V_CCLD)$(libshadow_la_LINK)  $(libshadow_la_OBJECTS) $(libshadow_la_LIBADD) $(LIBS)
 
 mostlyclean-compile:
 	-rm -f *.$(OBJEXT)
+	-rm -f atoi/*.$(OBJEXT)
+	-rm -f atoi/*.lo
+	-rm -f string/*.$(OBJEXT)
+	-rm -f string/*.lo
+	-rm -f time/*.$(OBJEXT)
+	-rm -f time/*.lo
 
 distclean-compile:
 	-rm -f *.tab.c
 
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-addgrps.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-adds.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-age.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-agetpass.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-alloc.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-audit_help.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-basename.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-bit.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-btrfs.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-chkname.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-chowndir.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-chowntty.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-cleanup.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-cleanup_group.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-cleanup_user.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-commonio.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-console.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-copydir.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-csrand.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-encrypt.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-env.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-failure.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-fd.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-fields.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-find_new_gid.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-find_new_sub_gids.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-find_new_sub_uids.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-find_new_uid.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-fputsx.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-freezero.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-get_gid.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-get_pid.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-get_uid.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-getdate.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-getdef.Plo@am__quote@ # am--include-marker
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-getlong.Plo@am__quote@ # am--include-marker
-@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-getulong.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-getgr_nam_gid.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-getrange.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-gettime.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-groupio.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-groupmem.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-gshadow.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-hushed.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-idmapping.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-isexpired.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-limits.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-list.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-lockpw.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-log.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-logind.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-loginprompt.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-mail.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-memzero.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-motd.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-myname.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-nscd.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-nss.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-obscure.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-pam_pass.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-pam_pass_non_interactive.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libshadow_la-port.Plo@am__quote@ # am--include-marker
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 libshadow_la-get_uid.lo: get_uid.c
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 libshadow_la-nss.lo: nss.c
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 libshadow_la-nscd.lo: nscd.c
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+libshadow_la-obscure.lo: obscure.c
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+libshadow_la-pam_pass.lo: pam_pass.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pam_pass.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pam_pass.Tpo -c -o libshadow_la-pam_pass.lo `test -f 'pam_pass.c' || echo '$(srcdir)/'`pam_pass.c
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+libshadow_la-pam_pass_non_interactive.lo: pam_pass_non_interactive.c
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+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
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 libshadow_la-port.lo: port.c
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+libshadow_la-prefix_flag.lo: prefix_flag.c
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+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-prefix_flag.Tpo $(DEPDIR)/libshadow_la-prefix_flag.Plo
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 libshadow_la-pwauth.lo: pwauth.c
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+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pwauth.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwauth.Tpo -c -o libshadow_la-pwauth.lo `test -f 'pwauth.c' || echo '$(srcdir)/'`pwauth.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-pwauth.Tpo $(DEPDIR)/libshadow_la-pwauth.Plo
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwauth.lo `test -f 'pwauth.c' || echo '$(srcdir)/'`pwauth.c
 
 libshadow_la-pwio.lo: pwio.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libshadow_la-pwio.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwio.Tpo -c -o libshadow_la-pwio.lo `test -f 'pwio.c' || echo '$(srcdir)/'`pwio.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pwio.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwio.Tpo -c -o libshadow_la-pwio.lo `test -f 'pwio.c' || echo '$(srcdir)/'`pwio.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-pwio.Tpo $(DEPDIR)/libshadow_la-pwio.Plo
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 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwio.lo `test -f 'pwio.c' || echo '$(srcdir)/'`pwio.c
+
+libshadow_la-pwd_init.lo: pwd_init.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pwd_init.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwd_init.Tpo -c -o libshadow_la-pwd_init.lo `test -f 'pwd_init.c' || echo '$(srcdir)/'`pwd_init.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-pwd_init.Tpo $(DEPDIR)/libshadow_la-pwd_init.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='pwd_init.c' object='libshadow_la-pwd_init.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwd_init.lo `test -f 'pwd_init.c' || echo '$(srcdir)/'`pwd_init.c
+
+libshadow_la-pwd2spwd.lo: pwd2spwd.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pwd2spwd.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwd2spwd.Tpo -c -o libshadow_la-pwd2spwd.lo `test -f 'pwd2spwd.c' || echo '$(srcdir)/'`pwd2spwd.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-pwd2spwd.Tpo $(DEPDIR)/libshadow_la-pwd2spwd.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='pwd2spwd.c' object='libshadow_la-pwd2spwd.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwd2spwd.lo `test -f 'pwd2spwd.c' || echo '$(srcdir)/'`pwd2spwd.c
+
+libshadow_la-pwdcheck.lo: pwdcheck.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pwdcheck.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwdcheck.Tpo -c -o libshadow_la-pwdcheck.lo `test -f 'pwdcheck.c' || echo '$(srcdir)/'`pwdcheck.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-pwdcheck.Tpo $(DEPDIR)/libshadow_la-pwdcheck.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='pwdcheck.c' object='libshadow_la-pwdcheck.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwdcheck.lo `test -f 'pwdcheck.c' || echo '$(srcdir)/'`pwdcheck.c
 
 libshadow_la-pwmem.lo: pwmem.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libshadow_la-pwmem.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwmem.Tpo -c -o libshadow_la-pwmem.lo `test -f 'pwmem.c' || echo '$(srcdir)/'`pwmem.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-pwmem.lo -MD -MP -MF $(DEPDIR)/libshadow_la-pwmem.Tpo -c -o libshadow_la-pwmem.lo `test -f 'pwmem.c' || echo '$(srcdir)/'`pwmem.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-pwmem.Tpo $(DEPDIR)/libshadow_la-pwmem.Plo
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-@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwmem.lo `test -f 'pwmem.c' || echo '$(srcdir)/'`pwmem.c
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-pwmem.lo `test -f 'pwmem.c' || echo '$(srcdir)/'`pwmem.c
+
+libshadow_la-remove_tree.lo: remove_tree.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-remove_tree.lo -MD -MP -MF $(DEPDIR)/libshadow_la-remove_tree.Tpo -c -o libshadow_la-remove_tree.lo `test -f 'remove_tree.c' || echo '$(srcdir)/'`remove_tree.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-remove_tree.Tpo $(DEPDIR)/libshadow_la-remove_tree.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='remove_tree.c' object='libshadow_la-remove_tree.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-remove_tree.lo `test -f 'remove_tree.c' || echo '$(srcdir)/'`remove_tree.c
+
+libshadow_la-rlogin.lo: rlogin.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-rlogin.lo -MD -MP -MF $(DEPDIR)/libshadow_la-rlogin.Tpo -c -o libshadow_la-rlogin.lo `test -f 'rlogin.c' || echo '$(srcdir)/'`rlogin.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-rlogin.Tpo $(DEPDIR)/libshadow_la-rlogin.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='rlogin.c' object='libshadow_la-rlogin.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-rlogin.lo `test -f 'rlogin.c' || echo '$(srcdir)/'`rlogin.c
+
+libshadow_la-root_flag.lo: root_flag.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-root_flag.lo -MD -MP -MF $(DEPDIR)/libshadow_la-root_flag.Tpo -c -o libshadow_la-root_flag.lo `test -f 'root_flag.c' || echo '$(srcdir)/'`root_flag.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-root_flag.Tpo $(DEPDIR)/libshadow_la-root_flag.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='root_flag.c' object='libshadow_la-root_flag.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-root_flag.lo `test -f 'root_flag.c' || echo '$(srcdir)/'`root_flag.c
 
 libshadow_la-run_part.lo: run_part.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libshadow_la-run_part.lo -MD -MP -MF $(DEPDIR)/libshadow_la-run_part.Tpo -c -o libshadow_la-run_part.lo `test -f 'run_part.c' || echo '$(srcdir)/'`run_part.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-run_part.lo -MD -MP -MF $(DEPDIR)/libshadow_la-run_part.Tpo -c -o libshadow_la-run_part.lo `test -f 'run_part.c' || echo '$(srcdir)/'`run_part.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-run_part.Tpo $(DEPDIR)/libshadow_la-run_part.Plo
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-run_part.lo `test -f 'run_part.c' || echo '$(srcdir)/'`run_part.c
 
-libshadow_la-subordinateio.lo: subordinateio.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libshadow_la-subordinateio.lo -MD -MP -MF $(DEPDIR)/libshadow_la-subordinateio.Tpo -c -o libshadow_la-subordinateio.lo `test -f 'subordinateio.c' || echo '$(srcdir)/'`subordinateio.c
-@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-subordinateio.Tpo $(DEPDIR)/libshadow_la-subordinateio.Plo
-@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='subordinateio.c' object='libshadow_la-subordinateio.lo' libtool=yes @AMDEPBACKSLASH@
+libshadow_la-salt.lo: salt.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-salt.lo -MD -MP -MF $(DEPDIR)/libshadow_la-salt.Tpo -c -o libshadow_la-salt.lo `test -f 'salt.c' || echo '$(srcdir)/'`salt.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-salt.Tpo $(DEPDIR)/libshadow_la-salt.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='salt.c' object='libshadow_la-salt.lo' libtool=yes @AMDEPBACKSLASH@
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-salt.lo `test -f 'salt.c' || echo '$(srcdir)/'`salt.c
 
 libshadow_la-selinux.lo: selinux.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libshadow_la-selinux.lo -MD -MP -MF $(DEPDIR)/libshadow_la-selinux.Tpo -c -o libshadow_la-selinux.lo `test -f 'selinux.c' || echo '$(srcdir)/'`selinux.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-selinux.lo -MD -MP -MF $(DEPDIR)/libshadow_la-selinux.Tpo -c -o libshadow_la-selinux.lo `test -f 'selinux.c' || echo '$(srcdir)/'`selinux.c
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+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-selinux.lo `test -f 'selinux.c' || echo '$(srcdir)/'`selinux.c
 
 libshadow_la-semanage.lo: semanage.c
-@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libshadow_la-semanage.lo -MD -MP -MF $(DEPDIR)/libshadow_la-semanage.Tpo -c -o libshadow_la-semanage.lo `test -f 'semanage.c' || echo '$(srcdir)/'`semanage.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-semanage.lo -MD -MP -MF $(DEPDIR)/libshadow_la-semanage.Tpo -c -o libshadow_la-semanage.lo `test -f 'semanage.c' || echo '$(srcdir)/'`semanage.c
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+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='freezero.c' object='libshadow_la-freezero.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-freezero.lo `test -f 'freezero.c' || echo '$(srcdir)/'`freezero.c
+
+libshadow_la-readpassphrase.lo: readpassphrase.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -MT libshadow_la-readpassphrase.lo -MD -MP -MF $(DEPDIR)/libshadow_la-readpassphrase.Tpo -c -o libshadow_la-readpassphrase.lo `test -f 'readpassphrase.c' || echo '$(srcdir)/'`readpassphrase.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libshadow_la-readpassphrase.Tpo $(DEPDIR)/libshadow_la-readpassphrase.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='readpassphrase.c' object='libshadow_la-readpassphrase.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libshadow_la_CPPFLAGS) $(CPPFLAGS) $(libshadow_la_CFLAGS) $(CFLAGS) -c -o libshadow_la-readpassphrase.lo `test -f 'readpassphrase.c' || echo '$(srcdir)/'`readpassphrase.c
+
+.y.c:
+	$(AM_V_YACC)$(am__skipyacc) $(SHELL) $(YLWRAP) $< y.tab.c $@ y.tab.h `echo $@ | $(am__yacc_c2h)` y.output $*.output -- $(YACCCOMPILE)
 
 mostlyclean-libtool:
 	-rm -f *.lo
 
 clean-libtool:
 	-rm -rf .libs _libs
+	-rm -rf atoi/.libs atoi/_libs
+	-rm -rf string/.libs string/_libs
+	-rm -rf time/.libs time/_libs
 
 ID: $(am__tagged_files)
 	$(am__define_uniq_tagged_files); mkid -fID $$unique
@@ -916,39 +1839,100 @@ clean-generic:
 distclean-generic:
 	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
 	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+	-rm -f atoi/$(DEPDIR)/$(am__dirstamp)
+	-rm -f atoi/$(am__dirstamp)
+	-rm -f string/$(DEPDIR)/$(am__dirstamp)
+	-rm -f string/$(am__dirstamp)
+	-rm -f time/$(DEPDIR)/$(am__dirstamp)
+	-rm -f time/$(am__dirstamp)
 
 maintainer-clean-generic:
 	@echo "This command is intended for maintainers to use"
 	@echo "it deletes files that may require special tools to rebuild."
+	-rm -f getdate.c
 clean: clean-am
 
 clean-am: clean-generic clean-libtool clean-noinstLTLIBRARIES \
 	mostlyclean-am
 
 distclean: distclean-am
-		-rm -f ./$(DEPDIR)/libshadow_la-commonio.Plo
+		-rm -f ./$(DEPDIR)/libshadow_la-addgrps.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-adds.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-age.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-agetpass.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-alloc.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-audit_help.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-basename.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-bit.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-btrfs.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-chkname.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-chowndir.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-chowntty.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-cleanup.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-cleanup_group.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-cleanup_user.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-commonio.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-console.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-copydir.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-csrand.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-encrypt.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-env.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-failure.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-fd.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-fields.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_gid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_sub_gids.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_sub_uids.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_uid.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-fputsx.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-freezero.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-get_gid.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-get_pid.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-get_uid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-getdate.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-getdef.Plo
-	-rm -f ./$(DEPDIR)/libshadow_la-getlong.Plo
-	-rm -f ./$(DEPDIR)/libshadow_la-getulong.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-getgr_nam_gid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-getrange.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-gettime.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-groupio.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-groupmem.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-gshadow.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-hushed.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-idmapping.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-isexpired.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-limits.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-list.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-lockpw.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-log.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-logind.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-loginprompt.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-mail.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-memzero.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-motd.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-myname.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-nscd.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-nss.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-obscure.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pam_pass.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pam_pass_non_interactive.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-port.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-prefix_flag.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-pwauth.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pwd2spwd.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pwd_init.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pwdcheck.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-pwio.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-pwmem.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-readpassphrase.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-remove_tree.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-rlogin.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-root_flag.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-run_part.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-salt.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-selinux.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-semanage.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-setugid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-setupenv.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sgetgrent.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sgetpwent.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sgetspent.Plo
@@ -957,11 +1941,38 @@ distclean: distclean-am
 	-rm -f ./$(DEPDIR)/libshadow_la-shadowio.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-shadowlog.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-shadowmem.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-shell.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-spawn.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sssd.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-strtoday.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-sub.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-subordinateio.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-sulog.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-tcbfuncs.Plo
-	-rm -f ./$(DEPDIR)/libshadow_la-utent.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-ttytype.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-tz.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-ulimit.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-user_busy.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-utmp.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-valid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-write_full.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetgrgid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetgrnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetpwnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetpwuid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetspnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xprefix_getpwnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-yesno.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-a2i.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-str2i.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-strtoi.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-strtou_noneg.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-sprintf.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-stpecpy.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-stpeprintf.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-strftime.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-strtcpy.Plo
+	-rm -f time/$(DEPDIR)/libshadow_la-day_to_str.Plo
 	-rm -f Makefile
 distclean-am: clean-am distclean-compile distclean-generic \
 	distclean-tags
@@ -1007,29 +2018,83 @@ install-ps-am:
 installcheck-am:
 
 maintainer-clean: maintainer-clean-am
-		-rm -f ./$(DEPDIR)/libshadow_la-commonio.Plo
+		-rm -f ./$(DEPDIR)/libshadow_la-addgrps.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-adds.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-age.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-agetpass.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-alloc.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-audit_help.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-basename.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-bit.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-btrfs.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-chkname.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-chowndir.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-chowntty.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-cleanup.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-cleanup_group.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-cleanup_user.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-commonio.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-console.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-copydir.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-csrand.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-encrypt.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-env.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-failure.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-fd.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-fields.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_gid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_sub_gids.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_sub_uids.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-find_new_uid.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-fputsx.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-freezero.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-get_gid.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-get_pid.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-get_uid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-getdate.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-getdef.Plo
-	-rm -f ./$(DEPDIR)/libshadow_la-getlong.Plo
-	-rm -f ./$(DEPDIR)/libshadow_la-getulong.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-getgr_nam_gid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-getrange.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-gettime.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-groupio.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-groupmem.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-gshadow.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-hushed.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-idmapping.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-isexpired.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-limits.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-list.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-lockpw.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-log.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-logind.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-loginprompt.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-mail.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-memzero.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-motd.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-myname.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-nscd.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-nss.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-obscure.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pam_pass.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pam_pass_non_interactive.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-port.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-prefix_flag.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-pwauth.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pwd2spwd.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pwd_init.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-pwdcheck.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-pwio.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-pwmem.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-readpassphrase.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-remove_tree.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-rlogin.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-root_flag.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-run_part.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-salt.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-selinux.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-semanage.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-setugid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-setupenv.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sgetgrent.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sgetpwent.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sgetspent.Plo
@@ -1038,11 +2103,38 @@ maintainer-clean: maintainer-clean-am
 	-rm -f ./$(DEPDIR)/libshadow_la-shadowio.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-shadowlog.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-shadowmem.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-shell.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-spawn.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-sssd.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-strtoday.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-sub.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-subordinateio.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-sulog.Plo
 	-rm -f ./$(DEPDIR)/libshadow_la-tcbfuncs.Plo
-	-rm -f ./$(DEPDIR)/libshadow_la-utent.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-ttytype.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-tz.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-ulimit.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-user_busy.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-utmp.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-valid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-write_full.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetgrgid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetgrnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetpwnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetpwuid.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xgetspnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-xprefix_getpwnam.Plo
+	-rm -f ./$(DEPDIR)/libshadow_la-yesno.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-a2i.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-str2i.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-strtoi.Plo
+	-rm -f atoi/$(DEPDIR)/libshadow_la-strtou_noneg.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-sprintf.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-stpecpy.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-stpeprintf.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-strftime.Plo
+	-rm -f string/$(DEPDIR)/libshadow_la-strtcpy.Plo
+	-rm -f time/$(DEPDIR)/libshadow_la-day_to_str.Plo
 	-rm -f Makefile
 maintainer-clean-am: distclean-am maintainer-clean-generic
 
diff --git a/lib/addgrps.c b/lib/addgrps.c
new file mode 100644
index 0000000..dae3dba
--- /dev/null
+++ b/lib/addgrps.c
@@ -0,0 +1,114 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#if defined (HAVE_SETGROUPS) && ! defined (USE_PAM)
+
+#include "prototypes.h"
+#include "defines.h"
+
+#include <stdio.h>
+#include <grp.h>
+#include <errno.h>
+
+#include "alloc.h"
+#include "shadowlog.h"
+
+#ident "$Id$"
+
+#define SEP ",:"
+/*
+ * Add groups with names from LIST (separated by commas or colons)
+ * to the supplementary group set.  Silently ignore groups which are
+ * already there.  Warning: uses strtok().
+ */
+int add_groups (const char *list)
+{
+	GETGROUPS_T *grouplist;
+	size_t i;
+	int ngroups;
+	bool added;
+	char *token;
+	char buf[1024];
+	int ret;
+	FILE *shadow_logfd = log_get_logfd();
+
+	if (strlen (list) >= sizeof (buf)) {
+		errno = EINVAL;
+		return -1;
+	}
+	strcpy (buf, list);
+
+	i = 16;
+	for (;;) {
+		grouplist = MALLOC(i, GETGROUPS_T);
+		if (NULL == grouplist) {
+			return -1;
+		}
+		ngroups = getgroups (i, grouplist);
+		if (   (   (-1 == ngroups)
+		        && (EINVAL != errno))
+		    || (i > (size_t)ngroups)) {
+			/* Unexpected failure of getgroups or successful
+			 * reception of the groups */
+			break;
+		}
+		/* not enough room, so try allocating a larger buffer */
+		free (grouplist);
+		i *= 2;
+	}
+	if (ngroups < 0) {
+		free (grouplist);
+		return -1;
+	}
+
+	added = false;
+	for (token = strtok (buf, SEP); NULL != token; token = strtok (NULL, SEP)) {
+		struct group *grp;
+
+		grp = getgrnam (token); /* local, no need for xgetgrnam */
+		if (NULL == grp) {
+			fprintf (shadow_logfd, _("Warning: unknown group %s\n"),
+				 token);
+			continue;
+		}
+
+		for (i = 0; i < (size_t)ngroups && grouplist[i] != grp->gr_gid; i++);
+
+		if (i < (size_t)ngroups) {
+			continue;
+		}
+
+		if (ngroups >= sysconf (_SC_NGROUPS_MAX)) {
+			fputs (_("Warning: too many groups\n"), shadow_logfd);
+			break;
+		}
+		grouplist = REALLOCF(grouplist, (size_t) ngroups + 1, GETGROUPS_T);
+		if (grouplist == NULL) {
+			return -1;
+		}
+		grouplist[ngroups] = grp->gr_gid;
+		ngroups++;
+		added = true;
+	}
+
+	if (added) {
+		ret = setgroups (ngroups, grouplist);
+		free (grouplist);
+		return ret;
+	}
+
+	free (grouplist);
+	return 0;
+}
+#else				/* HAVE_SETGROUPS && !USE_PAM */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* HAVE_SETGROUPS && !USE_PAM */
+
diff --git a/lib/adds.c b/lib/adds.c
new file mode 100644
index 0000000..5d8c153
--- /dev/null
+++ b/lib/adds.c
@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "adds.h"
+
+#include <stddef.h>
+
+
+extern inline long addsl2(long a, long b);
+extern inline long addslN(size_t n, long addend[n]);
+
+extern inline int cmpl(const void *p1, const void *p2);
diff --git a/lib/adds.h b/lib/adds.h
new file mode 100644
index 0000000..6544ce5
--- /dev/null
+++ b/lib/adds.h
@@ -0,0 +1,86 @@
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_ADDS_H_
+#define SHADOW_INCLUDE_LIB_ADDS_H_
+
+
+#include <config.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+#include "sizeof.h"
+
+
+#define addsl(a, b, ...)                                                      \
+({                                                                            \
+	long  addend_[] = {a, b, __VA_ARGS__};                                \
+                                                                              \
+	addslN(NITEMS(addend_), addend_);                                     \
+})
+
+
+inline long addsl2(long a, long b);
+inline long addslN(size_t n, long addend[n]);
+
+inline int cmpl(const void *p1, const void *p2);
+
+
+inline long
+addsl2(long a, long b)
+{
+	if (a > 0 && b > LONG_MAX - a) {
+		errno = EOVERFLOW;
+		return LONG_MAX;
+	}
+	if (a < 0 && b < LONG_MIN - a) {
+		errno = EOVERFLOW;
+		return LONG_MIN;
+	}
+	return a + b;
+}
+
+
+inline long
+addslN(size_t n, long addend[n])
+{
+	int   e;
+
+	if (n == 0) {
+		errno = EDOM;
+		return 0;
+	}
+
+	e = errno;
+	while (n > 1) {
+		qsort(addend, n, sizeof(addend[0]), cmpl);
+
+		errno = 0;
+		addend[0] = addsl2(addend[0], addend[--n]);
+		if (errno == EOVERFLOW)
+			return addend[0];
+	}
+	errno = e;
+	return addend[0];
+}
+
+
+inline int
+cmpl(const void *p1, const void *p2)
+{
+	const long  *l1 = p1;
+	const long  *l2 = p2;
+
+	if (*l1 < *l2)
+		return -1;
+	if (*l1 > *l2)
+		return +1;
+	return 0;
+}
+
+
+#endif  // include guard
diff --git a/lib/age.c b/lib/age.c
new file mode 100644
index 0000000..72a13ea
--- /dev/null
+++ b/lib/age.c
@@ -0,0 +1,181 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <time.h>
+#include <errno.h>
+#include <pwd.h>
+#include <grp.h>
+
+#include "adds.h"
+#include "defines.h"
+#include "exitcodes.h"
+#include "prototypes.h"
+
+
+#ident "$Id$"
+
+#ifndef PASSWD_PROGRAM
+#define PASSWD_PROGRAM "/bin/passwd"
+#endif
+/*
+ * expire - force password change if password expired
+ *
+ *	expire() calls /bin/passwd to change the user's password
+ *	if it has expired.
+ */
+int expire (const struct passwd *pw, /*@null@*/const struct spwd *sp)
+{
+	int status;
+	pid_t child;
+	pid_t pid;
+
+	if (NULL == sp) {
+		return 0;
+	}
+
+	/*
+	 * See if the user's password has expired, and if so
+	 * force them to change their password.
+	 */
+
+	status = isexpired (pw, sp);
+	switch (status) {
+	case 0:
+		return 0;
+	case 1:
+		(void) fputs (_("Your password has expired."), stdout);
+		break;
+	case 2:
+		(void) fputs (_("Your password is inactive."), stdout);
+		break;
+	case 3:
+		(void) fputs (_("Your login has expired."), stdout);
+		break;
+	}
+
+	/*
+	 * Setting the maximum valid period to less than the minimum
+	 * valid period means that the minimum period will never
+	 * occur while the password is valid, so the user can never
+	 * change that password.
+	 */
+
+	if ((status > 1) || (sp->sp_max < sp->sp_min)) {
+		(void) puts (_("  Contact the system administrator."));
+		exit (EXIT_FAILURE);
+	}
+	(void) puts (_("  Choose a new password."));
+	(void) fflush (stdout);
+
+	/*
+	 * Close all the files so that unauthorized access won't
+	 * occur.  This needs to be done anyway because those files
+	 * might become stale after "passwd" is executed.
+	 */
+
+	endspent ();
+	endpwent ();
+#ifdef SHADOWGRP
+	endsgent ();
+#endif
+	endgrent ();
+
+	/*
+	 * Execute the /bin/passwd command.  The exit status will be
+	 * examined to see what the result is.  If there are any
+	 * errors the routine will exit.  This forces the user to
+	 * change their password before being able to use the account.
+	 */
+
+	pid = fork ();
+	if (0 == pid) {
+		int err;
+
+		/*
+		 * Set the UID to be that of the user.  This causes
+		 * passwd to work just like it would had they executed
+		 * it from the command line while logged in.
+		 */
+#if defined(HAVE_INITGROUPS) && ! defined(USE_PAM)
+		if (setup_uid_gid (pw, false) != 0)
+#else
+		if (setup_uid_gid (pw) != 0)
+#endif
+		{
+			_exit (126);
+		}
+
+		(void) execl (PASSWD_PROGRAM, PASSWD_PROGRAM, pw->pw_name, (char *) NULL);
+		err = errno;
+		perror ("Can't execute " PASSWD_PROGRAM);
+		_exit ((ENOENT == err) ? E_CMD_NOTFOUND : E_CMD_NOEXEC);
+	} else if ((pid_t) -1 == pid) {
+		perror ("fork");
+		exit (EXIT_FAILURE);
+	}
+
+	while (((child = wait (&status)) != pid) && (child != (pid_t)-1));
+
+	if ((child == pid) && (0 == status)) {
+		return 1;
+	}
+
+	exit (EXIT_FAILURE);
+ /*@notreached@*/}
+
+/*
+ * agecheck - see if warning is needed for password expiration
+ *
+ *	agecheck sees how many days until the user's password is going
+ *	to expire and warns the user of the pending password expiration.
+ */
+
+void agecheck (/*@null@*/const struct spwd *sp)
+{
+	long now = time(NULL) / DAY;
+	long remain;
+
+	if (NULL == sp) {
+		return;
+	}
+
+	/*
+	 * The last, max, and warn fields must be supported or the
+	 * warning period cannot be calculated.
+	 */
+
+	if (   (-1 == sp->sp_lstchg)
+	    || (-1 == sp->sp_max)
+	    || (-1 == sp->sp_warn)) {
+		return;
+	}
+
+	if (0 == sp->sp_lstchg) {
+		(void) puts (_("You must change your password."));
+		return;
+	}
+
+	remain = addsl(sp->sp_lstchg, sp->sp_max, -now);
+
+	if (remain <= sp->sp_warn) {
+		if (remain > 1) {
+			(void) printf (_("Your password will expire in %ld days.\n"),
+			               remain);
+		} else if (1 == remain) {
+			(void) puts (_("Your password will expire tomorrow."));
+		} else if (remain == 0) {
+			(void) puts (_("Your password will expire today."));
+		}
+	}
+}
+
diff --git a/lib/agetpass.c b/lib/agetpass.c
new file mode 100644
index 0000000..5d9f928
--- /dev/null
+++ b/lib/agetpass.c
@@ -0,0 +1,145 @@
+/*
+ * SPDX-FileCopyrightText:  2022, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#include "agetpass.h"
+
+#include <limits.h>
+#include <readpassphrase.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ident "$Id$"
+
+#include "alloc.h"
+
+#if WITH_LIBBSD == 0
+#include "freezero.h"
+#endif /* WITH_LIBBSD */
+
+
+/*
+ * SYNOPSIS
+ *	[[gnu::malloc(erase_pass)]]
+ *	char *agetpass(const char *prompt);
+ *	char *agetpass_stdin();
+ *
+ *	void erase_pass(char *pass);
+ *
+ * ARGUMENTS
+ *   agetpass()
+ *	prompt	String to be printed before reading a password.
+ *
+ *   erase_pass()
+ *	pass	password previously returned by agetpass().
+ *
+ * DESCRIPTION
+ *   agetpass()
+ *	This function is very similar to getpass(3).  It has several
+ *	advantages compared to getpass(3):
+ *
+ *	- Instead of using a static buffer, agetpass() allocates memory
+ *	  through malloc(3).  This makes the function thread-safe, and
+ *	  also reduces the visibility of the buffer.
+ *
+ *	- agetpass() doesn't reallocate internally.  Some
+ *	  implementations of getpass(3), such as glibc, do that, as a
+ *	  consequence of calling getline(3).  That's a bug in glibc,
+ *	  which allows leaking prefixes of passwords in freed memory.
+ *
+ *	- agetpass() doesn't overrun the output buffer.  If the input
+ *	  password is too long, it simply fails.  Some implementations
+ *	  of getpass(3), share the same bug that gets(3) has.
+ *
+ *	As soon as possible, the password obtained from agetpass() be
+ *	erased by calling erase_pass(), to avoid possibly leaking the
+ *	password.
+ *
+ *   agetpass_stdin()
+ *	This function is the same as previous one (agetpass). Just the
+ *	password is read from stdin and terminal is not required.
+ *
+ *   erase_pass()
+ *	This function first clears the password, by calling
+ *	explicit_bzero(3) (or an equivalent call), and then frees the
+ *	allocated memory by calling free(3).
+ *
+ *	NULL is a valid input pointer, and in such a case, this call is
+ *	a no-op.
+ *
+ * RETURN VALUE
+ *	agetpass() returns a newly allocated buffer containing the
+ *	password on success.  On error, errno is set to indicate the
+ *	error, and NULL is returned.
+ *
+ * ERRORS
+ *   agetpass()
+ *	This function may fail for any errors that malloc(3) or
+ *	readpassphrase(3) may fail, and in addition it may fail for the
+ *	following errors:
+ *
+ *	ENOBUFS
+ *		The input password was longer than PASS_MAX.
+ *
+ * CAVEATS
+ *	If a password is passed twice to erase_pass(), the behavior is
+ *	undefined.
+ */
+
+
+static char *
+agetpass_internal(const char *prompt, int flags)
+{
+	char    *pass;
+	size_t  len;
+
+	/*
+	 * Since we want to support passwords upto PASS_MAX, we need
+	 * PASS_MAX bytes for the password itself, and one more byte for
+	 * the terminating '\0'.  We also want to detect truncation, and
+	 * readpassphrase(3) doesn't detect it, so we need some trick.
+	 * Let's add one more byte, and if the password uses it, it
+	 * means the introduced password was longer than PASS_MAX.
+	 */
+	pass = MALLOC(PASS_MAX + 2, char);
+	if (pass == NULL)
+		return NULL;
+
+	if (readpassphrase(prompt, pass, PASS_MAX + 2, flags) == NULL)
+		goto fail;
+
+	len = strlen(pass);
+	if (len == PASS_MAX + 1) {
+		errno = ENOBUFS;
+		goto fail;
+	}
+
+	return pass;
+
+fail:
+	freezero(pass, PASS_MAX + 2);
+	return NULL;
+}
+
+char *
+agetpass(const char *prompt)
+{
+	return agetpass_internal(prompt, RPP_REQUIRE_TTY);
+}
+
+char *
+agetpass_stdin()
+{
+	return agetpass_internal(NULL, RPP_STDIN);
+}
+
+void
+erase_pass(char *pass)
+{
+	freezero(pass, PASS_MAX + 2);
+}
diff --git a/lib/agetpass.h b/lib/agetpass.h
new file mode 100644
index 0000000..4a4444e
--- /dev/null
+++ b/lib/agetpass.h
@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: 2022-2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_AGETPASS_H_
+#define SHADOW_INCLUDE_LIB_AGETPASS_H_
+
+
+#include <config.h>
+
+#include "attr.h"
+#include "defines.h"
+
+
+void erase_pass(char *pass);
+ATTR_MALLOC(erase_pass)
+char *agetpass(const char *prompt);
+char *agetpass_stdin();
+
+
+#endif  // include guard
diff --git a/lib/alloc.c b/lib/alloc.c
new file mode 100644
index 0000000..962f45a
--- /dev/null
+++ b/lib/alloc.c
@@ -0,0 +1,73 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ * SPDX-FileCopyrightText: 2023       , Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* Replacements for malloc and strdup with error checking.  Too trivial
+   to be worth copyrighting :-).  I did that because a lot of code used
+   malloc and strdup without checking for NULL pointer, and I like some
+   message better than a core dump...  --marekm
+
+   Yeh, but.  Remember that bailing out might leave the system in some
+   bizarre state.  You really want to put in error checking, then add
+   some back-out failure recovery code. -- jfh */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "alloc.h"
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "defines.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+
+extern inline void *xmalloc(size_t size);
+extern inline void *xmallocarray(size_t nmemb, size_t size);
+extern inline void *mallocarray(size_t nmemb, size_t size);
+extern inline void *reallocarrayf(void *p, size_t nmemb, size_t size);
+extern inline char *xstrdup(const char *str);
+
+
+void *
+xcalloc(size_t nmemb, size_t size)
+{
+	void  *p;
+
+	p = calloc(nmemb, size);
+	if (p == NULL)
+		goto x;
+
+	return p;
+
+x:
+	fprintf(log_get_logfd(), _("%s: %s\n"),
+	        log_get_progname(), strerror(errno));
+	exit(13);
+}
+
+
+void *
+xreallocarray(void *p, size_t nmemb, size_t size)
+{
+	p = reallocarrayf(p, nmemb, size);
+	if (p == NULL)
+		goto x;
+
+	return p;
+
+x:
+	fprintf(log_get_logfd(), _("%s: %s\n"),
+	        log_get_progname(), strerror(errno));
+	exit(13);
+}
diff --git a/lib/alloc.h b/lib/alloc.h
new file mode 100644
index 0000000..39405a5
--- /dev/null
+++ b/lib/alloc.h
@@ -0,0 +1,101 @@
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_MALLOC_H_
+#define SHADOW_INCLUDE_LIB_MALLOC_H_
+
+
+#include <config.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "attr.h"
+#include "defines.h"
+
+
+#define CALLOC(n, type)   ((type *) calloc(n, sizeof(type)))
+#define XCALLOC(n, type)  ((type *) xcalloc(n, sizeof(type)))
+#define MALLOC(n, type)   ((type *) mallocarray(n, sizeof(type)))
+#define XMALLOC(n, type)  ((type *) xmallocarray(n, sizeof(type)))
+
+#define REALLOC(ptr, n, type)                                                 \
+(                                                                             \
+	_Generic(ptr, type *:  (type *) reallocarray(ptr, n, sizeof(type)))   \
+)
+
+#define REALLOCF(ptr, n, type)                                                \
+(                                                                             \
+	_Generic(ptr, type *:  (type *) reallocarrayf(ptr, n, sizeof(type)))  \
+)
+
+#define XREALLOC(ptr, n, type)                                                \
+(                                                                             \
+	_Generic(ptr, type *:  (type *) xreallocarray(ptr, n, sizeof(type)))  \
+)
+
+
+ATTR_MALLOC(free)
+inline void *xmalloc(size_t size);
+ATTR_MALLOC(free)
+inline void *xmallocarray(size_t nmemb, size_t size);
+ATTR_MALLOC(free)
+inline void *mallocarray(size_t nmemb, size_t size);
+ATTR_MALLOC(free)
+inline void *reallocarrayf(void *p, size_t nmemb, size_t size);
+ATTR_MALLOC(free)
+inline char *xstrdup(const char *str);
+
+ATTR_MALLOC(free)
+void *xcalloc(size_t nmemb, size_t size);
+ATTR_MALLOC(free)
+void *xreallocarray(void *p, size_t nmemb, size_t size);
+
+
+inline void *
+xmalloc(size_t size)
+{
+	return xmallocarray(1, size);
+}
+
+
+inline void *
+xmallocarray(size_t nmemb, size_t size)
+{
+	return xreallocarray(NULL, nmemb, size);
+}
+
+
+inline void *
+mallocarray(size_t nmemb, size_t size)
+{
+	return reallocarray(NULL, nmemb, size);
+}
+
+
+inline void *
+reallocarrayf(void *p, size_t nmemb, size_t size)
+{
+	void  *q;
+
+	q = reallocarray(p, nmemb, size);
+
+	/* realloc(p, 0) is equivalent to free(p);  avoid double free.  */
+	if (q == NULL && nmemb != 0 && size != 0)
+		free(p);
+	return q;
+}
+
+
+inline char *
+xstrdup(const char *str)
+{
+	return strcpy(XMALLOC(strlen(str) + 1, char), str);
+}
+
+
+#endif  // include guard
diff --git a/lib/atoi/a2i.c b/lib/atoi/a2i.c
new file mode 100644
index 0000000..a2cf872
--- /dev/null
+++ b/lib/atoi/a2i.c
@@ -0,0 +1,46 @@
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "atoi/a2i.h"
+
+
+extern inline int a2sh_c(short *restrict n, const char *s,
+    const char **restrict endp, int base, short min, short max);
+extern inline int a2si_c(int *restrict n, const char *s,
+    const char **restrict endp, int base, int min, int max);
+extern inline int a2sl_c(long *restrict n, const char *s,
+    const char **restrict endp, int base, long min, long max);
+extern inline int a2sll_c(long long *restrict n, const char *s,
+    const char **restrict endp, int base, long long min, long long max);
+extern inline int a2uh_c(unsigned short *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned short min,
+    unsigned short max);
+extern inline int a2ui_c(unsigned int *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned int min, unsigned int max);
+extern inline int a2ul_c(unsigned long *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned long min, unsigned long max);
+extern inline int a2ull_c(unsigned long long *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned long long min,
+    unsigned long long max);
+
+
+extern inline int a2sh_nc(short *restrict n, char *s,
+    char **restrict endp, int base, short min, short max);
+extern inline int a2si_nc(int *restrict n, char *s,
+    char **restrict endp, int base, int min, int max);
+extern inline int a2sl_nc(long *restrict n, char *s,
+    char **restrict endp, int base, long min, long max);
+extern inline int a2sll_nc(long long *restrict n, char *s,
+    char **restrict endp, int base, long long min, long long max);
+extern inline int a2uh_nc(unsigned short *restrict n, char *s,
+    char **restrict endp, int base, unsigned short min, unsigned short max);
+extern inline int a2ui_nc(unsigned int *restrict n, char *s,
+    char **restrict endp, int base, unsigned int min, unsigned int max);
+extern inline int a2ul_nc(unsigned long *restrict n, char *s,
+    char **restrict endp, int base, unsigned long min, unsigned long max);
+extern inline int a2ull_nc(unsigned long long *restrict n, char *s,
+    char **restrict endp, int base, unsigned long long min,
+    unsigned long long max);
diff --git a/lib/atoi/a2i.h b/lib/atoi/a2i.h
new file mode 100644
index 0000000..64f775a
--- /dev/null
+++ b/lib/atoi/a2i.h
@@ -0,0 +1,386 @@
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_ATOI_A2I_H_
+#define SHADOW_INCLUDE_LIB_ATOI_A2I_H_
+
+
+#include <config.h>
+
+#include <errno.h>
+
+#include "atoi/strtoi.h"
+#include "atoi/strtou_noneg.h"
+#include "attr.h"
+
+
+/*
+ * See the manual of these macros in liba2i's documentation:
+ * <http://www.alejandro-colomar.es/share/dist/liba2i/git/HEAD/liba2i-HEAD.pdf>
+ */
+
+
+#define a2i(TYPE, n, s, ...)                                                  \
+(                                                                             \
+	_Generic((void (*)(TYPE, typeof(s))) 0,                               \
+		void (*)(short,              const char *):  a2sh_c,          \
+		void (*)(short,              const void *):  a2sh_c,          \
+		void (*)(short,              char *):        a2sh_nc,         \
+		void (*)(short,              void *):        a2sh_nc,         \
+		void (*)(int,                const char *):  a2si_c,          \
+		void (*)(int,                const void *):  a2si_c,          \
+		void (*)(int,                char *):        a2si_nc,         \
+		void (*)(int,                void *):        a2si_nc,         \
+		void (*)(long,               const char *):  a2sl_c,          \
+		void (*)(long,               const void *):  a2sl_c,          \
+		void (*)(long,               char *):        a2sl_nc,         \
+		void (*)(long,               void *):        a2sl_nc,         \
+		void (*)(long long,          const char *):  a2sll_c,         \
+		void (*)(long long,          const void *):  a2sll_c,         \
+		void (*)(long long,          char *):        a2sll_nc,        \
+		void (*)(long long,          void *):        a2sll_nc,        \
+		void (*)(unsigned short,     const char *):  a2uh_c,          \
+		void (*)(unsigned short,     const void *):  a2uh_c,          \
+		void (*)(unsigned short,     char *):        a2uh_nc,         \
+		void (*)(unsigned short,     void *):        a2uh_nc,         \
+		void (*)(unsigned int,       const char *):  a2ui_c,          \
+		void (*)(unsigned int,       const void *):  a2ui_c,          \
+		void (*)(unsigned int,       char *):        a2ui_nc,         \
+		void (*)(unsigned int,       void *):        a2ui_nc,         \
+		void (*)(unsigned long,      const char *):  a2ul_c,          \
+		void (*)(unsigned long,      const void *):  a2ul_c,          \
+		void (*)(unsigned long,      char *):        a2ul_nc,         \
+		void (*)(unsigned long,      void *):        a2ul_nc,         \
+		void (*)(unsigned long long, const char *):  a2ull_c,         \
+		void (*)(unsigned long long, const void *):  a2ull_c,         \
+		void (*)(unsigned long long, char *):        a2ull_nc,        \
+		void (*)(unsigned long long, void *):        a2ull_nc         \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+
+#define a2sh(n, s, ...)                                                       \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2sh_c,                                        \
+		const void *:  a2sh_c,                                        \
+		char *:        a2sh_nc,                                       \
+		void *:        a2sh_nc                                        \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2si(n, s, ...)                                                       \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2si_c,                                        \
+		const void *:  a2si_c,                                        \
+		char *:        a2si_nc,                                       \
+		void *:        a2si_nc                                        \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2sl(n, s, ...)                                                       \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2sl_c,                                        \
+		const void *:  a2sl_c,                                        \
+		char *:        a2sl_nc,                                       \
+		void *:        a2sl_nc                                        \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2sll(n, s, ...)                                                      \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2sll_c,                                       \
+		const void *:  a2sll_c,                                       \
+		char *:        a2sll_nc,                                      \
+		void *:        a2sll_nc                                       \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2uh(n, s, ...)                                                       \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2uh_c,                                        \
+		const void *:  a2uh_c,                                        \
+		char *:        a2uh_nc,                                       \
+		void *:        a2uh_nc                                        \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2ui(n, s, ...)                                                       \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2ui_c,                                        \
+		const void *:  a2ui_c,                                        \
+		char *:        a2ui_nc,                                       \
+		void *:        a2ui_nc                                        \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2ul(n, s, ...)                                                       \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2ul_c,                                        \
+		const void *:  a2ul_c,                                        \
+		char *:        a2ul_nc,                                       \
+		void *:        a2ul_nc                                        \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+#define a2ull(n, s, ...)                                                      \
+(                                                                             \
+	_Generic(s,                                                           \
+		const char *:  a2ull_c,                                       \
+		const void *:  a2ull_c,                                       \
+		char *:        a2ull_nc,                                      \
+		void *:        a2ull_nc                                       \
+	)(n, s, __VA_ARGS__)                                                  \
+)
+
+
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2sh_c(short *restrict n, const char *s,
+    const char **restrict endp, int base, short min, short max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2si_c(int *restrict n, const char *s,
+    const char **restrict endp, int base, int min, int max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2sl_c(long *restrict n, const char *s,
+    const char **restrict endp, int base, long min, long max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2sll_c(long long *restrict n, const char *s,
+    const char **restrict endp, int base, long long min, long long max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2uh_c(unsigned short *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned short min,
+    unsigned short max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2ui_c(unsigned int *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned int min, unsigned int max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2ul_c(unsigned long *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned long min, unsigned long max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2ull_c(unsigned long long *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned long long min,
+    unsigned long long max);
+
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2sh_nc(short *restrict n, char *s,
+    char **restrict endp, int base, short min, short max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2si_nc(int *restrict n, char *s,
+    char **restrict endp, int base, int min, int max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2sl_nc(long *restrict n, char *s,
+    char **restrict endp, int base, long min, long max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2sll_nc(long long *restrict n, char *s,
+    char **restrict endp, int base, long long min, long long max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2uh_nc(unsigned short *restrict n, char *s,
+    char **restrict endp, int base, unsigned short min, unsigned short max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2ui_nc(unsigned int *restrict n, char *s,
+    char **restrict endp, int base, unsigned int min, unsigned int max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2ul_nc(unsigned long *restrict n, char *s,
+    char **restrict endp, int base, unsigned long min, unsigned long max);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1) ATTR_ACCESS(write_only, 3)
+inline int a2ull_nc(unsigned long long *restrict n, char *s,
+    char **restrict endp, int base, unsigned long long min,
+    unsigned long long max);
+
+
+inline int
+a2sh_c(short *restrict n, const char *s,
+    const char **restrict endp, int base, short min, short max)
+{
+	return a2sh(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2si_c(int *restrict n, const char *s,
+    const char **restrict endp, int base, int min, int max)
+{
+	return a2si(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2sl_c(long *restrict n, const char *s,
+    const char **restrict endp, int base, long min, long max)
+{
+	return a2sl(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2sll_c(long long *restrict n, const char *s,
+    const char **restrict endp, int base, long long min, long long max)
+{
+	return a2sll(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2uh_c(unsigned short *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned short min,
+    unsigned short max)
+{
+	return a2uh(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2ui_c(unsigned int *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned int min, unsigned int max)
+{
+	return a2ui(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2ul_c(unsigned long *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned long min, unsigned long max)
+{
+	return a2ul(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2ull_c(unsigned long long *restrict n, const char *s,
+    const char **restrict endp, int base, unsigned long long min,
+    unsigned long long max)
+{
+	return a2ull(n, (char *) s, (char **) endp, base, min, max);
+}
+
+
+inline int
+a2sh_nc(short *restrict n, char *s,
+    char **restrict endp, int base, short min, short max)
+{
+	int  status;
+
+	*n = strtoi_(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2si_nc(int *restrict n, char *s,
+    char **restrict endp, int base, int min, int max)
+{
+	int  status;
+
+	*n = strtoi_(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2sl_nc(long *restrict n, char *s,
+    char **restrict endp, int base, long min, long max)
+{
+	int  status;
+
+	*n = strtoi_(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2sll_nc(long long *restrict n, char *s,
+    char **restrict endp, int base, long long min, long long max)
+{
+	int  status;
+
+	*n = strtoi_(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2uh_nc(unsigned short *restrict n, char *s,
+    char **restrict endp, int base, unsigned short min,
+    unsigned short max)
+{
+	int  status;
+
+	*n = strtou_noneg(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2ui_nc(unsigned int *restrict n, char *s,
+    char **restrict endp, int base, unsigned int min, unsigned int max)
+{
+	int  status;
+
+	*n = strtou_noneg(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2ul_nc(unsigned long *restrict n, char *s,
+    char **restrict endp, int base, unsigned long min, unsigned long max)
+{
+	int  status;
+
+	*n = strtou_noneg(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+inline int
+a2ull_nc(unsigned long long *restrict n, char *s,
+    char **restrict endp, int base, unsigned long long min,
+    unsigned long long max)
+{
+	int  status;
+
+	*n = strtou_noneg(s, endp, base, min, max, &status);
+	if (status != 0) {
+		errno = status;
+		return -1;
+	}
+	return 0;
+}
+
+
+#endif  // include guard
diff --git a/lib/atoi/str2i.c b/lib/atoi/str2i.c
new file mode 100644
index 0000000..25ce360
--- /dev/null
+++ b/lib/atoi/str2i.c
@@ -0,0 +1,18 @@
+// SPDX-FileCopyrightText: 2007-2009, Nicolas François
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "atoi/str2i.h"
+
+
+extern inline int str2sh(short *restrict n, const char *restrict s);
+extern inline int str2si(int *restrict n, const char *restrict s);
+extern inline int str2sl(long *restrict n, const char *restrict s);
+extern inline int str2sll(long long *restrict n, const char *restrict s);
+extern inline int str2uh(unsigned short *restrict n, const char *restrict s);
+extern inline int str2ui(unsigned int *restrict n, const char *restrict s);
+extern inline int str2ul(unsigned long *restrict n, const char *restrict s);
+extern inline int str2ull(unsigned long long *restrict n, const char *restrict s);
diff --git a/lib/atoi/str2i.h b/lib/atoi/str2i.h
new file mode 100644
index 0000000..b3ded03
--- /dev/null
+++ b/lib/atoi/str2i.h
@@ -0,0 +1,108 @@
+// SPDX-FileCopyrightText: 2007-2009, Nicolas François
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_ATOI_STR2I_H_
+#define SHADOW_INCLUDE_LIB_ATOI_STR2I_H_
+
+
+#include <config.h>
+
+#include <limits.h>
+#include <stddef.h>
+
+#include "atoi/a2i.h"
+#include "attr.h"
+
+
+#define str2i(TYPE, ...)                                                      \
+(                                                                             \
+	_Generic((TYPE) 0,                                                    \
+		short:              str2sh,                                   \
+		int:                str2si,                                   \
+		long:               str2sl,                                   \
+		long long:          str2sll,                                  \
+		unsigned short:     str2uh,                                   \
+		unsigned int:       str2ui,                                   \
+		unsigned long:      str2ul,                                   \
+		unsigned long long: str2ull                                   \
+	)(__VA_ARGS__)                                                        \
+)
+
+
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2sh(short *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2si(int *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2sl(long *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2sll(long long *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2uh(unsigned short *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2ui(unsigned int *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2ul(unsigned long *restrict n, const char *restrict s);
+ATTR_STRING(2) ATTR_ACCESS(write_only, 1)
+inline int str2ull(unsigned long long *restrict n, const char *restrict s);
+
+
+inline int
+str2sh(short *restrict n, const char *restrict s)
+{
+	return a2sh(n, s, NULL, 0, SHRT_MIN, SHRT_MAX);
+}
+
+
+inline int
+str2si(int *restrict n, const char *restrict s)
+{
+	return a2si(n, s, NULL, 0, INT_MIN, INT_MAX);
+}
+
+
+inline int
+str2sl(long *restrict n, const char *restrict s)
+{
+	return a2sl(n, s, NULL, 0, LONG_MIN, LONG_MAX);
+}
+
+
+inline int
+str2sll(long long *restrict n, const char *restrict s)
+{
+	return a2sll(n, s, NULL, 0, LLONG_MIN, LLONG_MAX);
+}
+
+
+inline int
+str2uh(unsigned short *restrict n, const char *restrict s)
+{
+	return a2uh(n, s, NULL, 0, 0, USHRT_MAX);
+}
+
+
+inline int
+str2ui(unsigned int *restrict n, const char *restrict s)
+{
+	return a2ui(n, s, NULL, 0, 0, UINT_MAX);
+}
+
+
+inline int
+str2ul(unsigned long *restrict n, const char *restrict s)
+{
+	return a2ul(n, s, NULL, 0, 0, ULONG_MAX);
+}
+
+
+inline int
+str2ull(unsigned long long *restrict n, const char *restrict s)
+{
+	return a2ull(n, s, NULL, 0, 0, ULLONG_MAX);
+}
+
+
+#endif  // include guard
diff --git a/lib/atoi/strtoi.c b/lib/atoi/strtoi.c
new file mode 100644
index 0000000..197707b
--- /dev/null
+++ b/lib/atoi/strtoi.c
@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "atoi/strtoi.h"
+
+#include <stdint.h>
+
+
+extern inline intmax_t strtoi_(const char *s, char **restrict endp, int base,
+    intmax_t min, intmax_t max, int *restrict status);
+extern inline uintmax_t strtou_(const char *s, char **restrict endp, int base,
+    uintmax_t min, uintmax_t max, int *restrict status);
diff --git a/lib/atoi/strtoi.h b/lib/atoi/strtoi.h
new file mode 100644
index 0000000..1f061fc
--- /dev/null
+++ b/lib/atoi/strtoi.h
@@ -0,0 +1,96 @@
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_ATOI_STRTOI_H_
+#define SHADOW_INCLUDE_LIB_ATOI_STRTOI_H_
+
+
+#include <config.h>
+
+#include <errno.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <sys/param.h>
+
+#include "attr.h"
+
+
+#define strtoNmax(TYPE, ...)                                                  \
+(                                                                             \
+	_Generic((TYPE) 0,                                                    \
+		intmax_t:  strtoimax,                                         \
+		uintmax_t: strtoumax                                          \
+	)(__VA_ARGS__)                                                        \
+)
+
+
+#define strtoN(s, endp, base, min, max, status, TYPE)                         \
+({                                                                            \
+	const char  *s_ = s;                                                  \
+	char        **endp_ = endp;                                           \
+	int         base_ = base;                                             \
+	TYPE        min_ = min;                                               \
+	TYPE        max_ = max;                                               \
+	int         *status_ = status;                                        \
+                                                                              \
+	int         e_, st_;                                                  \
+	char        *end_;                                                    \
+	TYPE        n_;                                                       \
+                                                                              \
+	if (endp_ == NULL)                                                    \
+		endp_ = &end_;                                                \
+	if (status_ == NULL)                                                  \
+		status_ = &st_;                                               \
+                                                                              \
+	if (base_ != 0 && (base_ < 0 || base_ > 36)) {                        \
+		*status_ = EINVAL;                                            \
+		n_ = 0;                                                       \
+                                                                              \
+	} else {                                                              \
+		e_ = errno;                                                   \
+		errno = 0;                                                    \
+		n_ = strtoNmax(TYPE, s_, endp_, base_);                       \
+                                                                              \
+		if (*endp_ == s_)                                             \
+			*status_ = ECANCELED;                                 \
+		else if (errno == ERANGE || n_ < min_ || n_ > max_)           \
+			*status_ = ERANGE;                                    \
+		else if (**endp_ != '\0')                                     \
+			*status_ = ENOTSUP;                                   \
+		else                                                          \
+			*status_ = 0;                                         \
+                                                                              \
+		errno = e_;                                                   \
+	}                                                                     \
+	MAX(min_, MIN(max_, n_));                                             \
+})
+
+
+ATTR_STRING(1) ATTR_ACCESS(write_only, 2) ATTR_ACCESS(write_only, 6)
+inline intmax_t strtoi_(const char *s, char **restrict endp, int base,
+    intmax_t min, intmax_t max, int *restrict status);
+ATTR_STRING(1) ATTR_ACCESS(write_only, 2) ATTR_ACCESS(write_only, 6)
+inline uintmax_t strtou_(const char *s, char **restrict endp, int base,
+    uintmax_t min, uintmax_t max, int *restrict status);
+
+
+inline intmax_t
+strtoi_(const char *s, char **restrict endp, int base,
+    intmax_t min, intmax_t max, int *restrict status)
+{
+	return strtoN(s, endp, base, min, max, status, intmax_t);
+}
+
+
+inline uintmax_t
+strtou_(const char *s, char **restrict endp, int base,
+    uintmax_t min, uintmax_t max, int *restrict status)
+{
+	return strtoN(s, endp, base, min, max, status, uintmax_t);
+}
+
+
+#endif  // include guard
diff --git a/lib/atoi/strtou_noneg.c b/lib/atoi/strtou_noneg.c
new file mode 100644
index 0000000..71cacbd
--- /dev/null
+++ b/lib/atoi/strtou_noneg.c
@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "atoi/strtou_noneg.h"
+
+#include <stdint.h>
+
+
+extern inline uintmax_t strtou_noneg(const char *s, char **restrict endp,
+    int base, uintmax_t min, uintmax_t max, int *restrict status);
diff --git a/lib/atoi/strtou_noneg.h b/lib/atoi/strtou_noneg.h
new file mode 100644
index 0000000..6d77adf
--- /dev/null
+++ b/lib/atoi/strtou_noneg.h
@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_ATOI_STRTOU_NONEG_H_
+#define SHADOW_INCLUDE_LIB_ATOI_STRTOU_NONEG_H_
+
+
+#include <config.h>
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include "atoi/strtoi.h"
+#include "attr.h"
+
+
+ATTR_STRING(1) ATTR_ACCESS(write_only, 2) ATTR_ACCESS(write_only, 6)
+inline uintmax_t strtou_noneg(const char *s, char **restrict endp,
+    int base, uintmax_t min, uintmax_t max, int *restrict status);
+
+
+inline uintmax_t
+strtou_noneg(const char *s, char **restrict endp, int base,
+    uintmax_t min, uintmax_t max, int *restrict status)
+{
+	int  st;
+
+	if (status == NULL)
+		status = &st;
+	if (strtoi_(s, endp, base, 0, 1, status) == 0 && *status == ERANGE)
+		return min;
+
+	return strtou_(s, endp, base, min, max, status);
+}
+
+
+#endif  // include guard
diff --git a/lib/attr.h b/lib/attr.h
new file mode 100644
index 0000000..3835848
--- /dev/null
+++ b/lib/attr.h
@@ -0,0 +1,33 @@
+#ifndef SHADOW_INCLUDE_LIB_ATTR_H_
+#define SHADOW_INCLUDE_LIB_ATTR_H_
+
+
+#include "config.h"
+
+
+#if defined(__GNUC__)
+# define MAYBE_UNUSED                __attribute__((unused))
+# define NORETURN                    __attribute__((__noreturn__))
+# define format_attr(type, fmt, va)  __attribute__((format(type, fmt, va)))
+# define ATTR_ACCESS(...)            __attribute__((access(__VA_ARGS__)))
+#else
+# define MAYBE_UNUSED
+# define NORETURN
+# define format_attr(type, fmt, va)
+# define ATTR_ACCESS(...)
+#endif
+
+#if (__GNUC__ >= 11) && !defined(__clang__)
+# define ATTR_MALLOC(deallocator)    [[gnu::malloc(deallocator)]]
+#else
+# define ATTR_MALLOC(deallocator)
+#endif
+
+#if (__GNUC__ >= 14)
+# define ATTR_STRING(...)       [[gnu::null_terminated_string_arg(__VA_ARGS__)]]
+#else
+# define ATTR_STRING(...)
+#endif
+
+
+#endif  // include guard
diff --git a/lib/audit_help.c b/lib/audit_help.c
new file mode 100644
index 0000000..54109f0
--- /dev/null
+++ b/lib/audit_help.c
@@ -0,0 +1,89 @@
+/*
+ * SPDX-FileCopyrightText: 2005       , Red Hat, Inc.
+ * SPDX-FileCopyrightText: 2005       , Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ *  Audit helper functions used throughout shadow
+ *
+ */
+
+#include <config.h>
+
+#ifdef WITH_AUDIT
+
+#include <stdlib.h>
+#include <syslog.h>
+#include <stdarg.h>
+#include <libaudit.h>
+#include <errno.h>
+#include <stdio.h>
+
+#include "attr.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+int audit_fd;
+
+void audit_help_open (void)
+{
+	audit_fd = audit_open ();
+	if (audit_fd < 0) {
+		/* You get these only when the kernel doesn't have
+		 * audit compiled in. */
+		if (   (errno == EINVAL)
+		    || (errno == EPROTONOSUPPORT)
+		    || (errno == EAFNOSUPPORT)) {
+			return;
+		}
+		(void) fputs (_("Cannot open audit interface - aborting.\n"),
+		              log_get_logfd());
+		exit (EXIT_FAILURE);
+	}
+}
+
+/*
+ * This function will log a message to the audit system using a predefined
+ * message format. Parameter usage is as follows:
+ *
+ * type - type of message: AUDIT_USER_CHAUTHTOK for changing any account
+ *	  attributes.
+ * pgname - program's name
+ * op  -  operation. "adding user", "changing finger info", "deleting group"
+ * name - user's account or group name. If not available use NULL.
+ * id  -  uid or gid that the operation is being performed on. This is used
+ *	  only when user is NULL.
+ */
+void audit_logger (int type, MAYBE_UNUSED const char *pgname, const char *op,
+                   const char *name, unsigned int id,
+                   shadow_audit_result result)
+{
+	if (audit_fd < 0) {
+		return;
+	} else {
+		audit_log_acct_message (audit_fd, type, NULL, op, name, id,
+		                        NULL, NULL, NULL, result);
+	}
+}
+
+void audit_logger_message (const char *message, shadow_audit_result result)
+{
+	if (audit_fd < 0) {
+		return;
+	} else {
+		audit_log_user_message (audit_fd,
+		                        AUDIT_USYS_CONFIG,
+		                        message,
+		                        NULL, /* hostname */
+		                        NULL, /* addr */
+		                        NULL, /* tty */
+		                        result);
+	}
+}
+
+#else				/* WITH_AUDIT */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* WITH_AUDIT */
+
diff --git a/lib/basename.c b/lib/basename.c
new file mode 100644
index 0000000..95a2f85
--- /dev/null
+++ b/lib/basename.c
@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * basename.c - not worth copyrighting :-).  Some versions of Linux libc
+ * already have basename(), other versions don't.  To avoid confusion,
+ * we will not use the function from libc and use a different name here.
+ * --marekm
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "defines.h"
+#include "prototypes.h"
+/*@observer@*/const char *Basename (const char *str)
+{
+	if (str == NULL) {
+		abort ();
+	}
+
+	char *cp = strrchr (str, '/');
+
+	return (NULL != cp) ? cp + 1 : str;
+}
diff --git a/lib/bit.c b/lib/bit.c
new file mode 100644
index 0000000..1ffc6dc
--- /dev/null
+++ b/lib/bit.c
@@ -0,0 +1,19 @@
+/*
+ * SPDX-FileCopyrightText:  2022 - 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "bit.h"
+
+#include <limits.h>
+
+
+extern inline unsigned long bit_ceilul(unsigned long x);
+extern inline unsigned long bit_ceil_wrapul(unsigned long x);
+extern inline int leading_zerosul(unsigned long x);
diff --git a/lib/bit.h b/lib/bit.h
new file mode 100644
index 0000000..7f09eb4
--- /dev/null
+++ b/lib/bit.h
@@ -0,0 +1,53 @@
+/*
+ * SPDX-FileCopyrightText:  2022 - 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_BIT_H_
+#define SHADOW_INCLUDE_LIB_BIT_H_
+
+
+#include <config.h>
+
+#include <limits.h>
+
+
+#ifndef ULONG_WIDTH
+#define ULONG_WIDTH (sizeof(unsigned long) * CHAR_BIT)
+#endif
+
+
+inline unsigned long bit_ceilul(unsigned long x);
+inline unsigned long bit_ceil_wrapul(unsigned long x);
+inline int leading_zerosul(unsigned long x);
+
+
+/* stdc_bit_ceilul(3) */
+inline unsigned long
+bit_ceilul(unsigned long x)
+{
+	return 1 + (ULONG_MAX >> leading_zerosul(x));
+}
+
+
+/* stdc_bit_ceilul(3), but wrap instead of having Undefined Behavior */
+inline unsigned long
+bit_ceil_wrapul(unsigned long x)
+{
+	if (x == 0)
+		return 0;
+
+	return bit_ceilul(x);
+}
+
+/* stdc_leading_zerosul(3) */
+inline int
+leading_zerosul(unsigned long x)
+{
+	return (x == 0) ? ULONG_WIDTH : __builtin_clzl(x);
+}
+
+
+#endif  // include guard
diff --git a/lib/btrfs.c b/lib/btrfs.c
new file mode 100644
index 0000000..0391598
--- /dev/null
+++ b/lib/btrfs.c
@@ -0,0 +1,110 @@
+#include <linux/btrfs_tree.h>
+#include <linux/magic.h>
+#include <sys/statfs.h>
+#include <stdbool.h>
+
+#include "prototypes.h"
+
+static bool path_exists(const char *p)
+{
+	struct stat sb;
+
+	return stat(p, &sb) == 0;
+}
+
+static const char *btrfs_cmd(void)
+{
+	const char *const btrfs_paths[] = {"/sbin/btrfs",
+		"/bin/btrfs", "/usr/sbin/btrfs", "/usr/bin/btrfs", NULL};
+	const char *p;
+	int i;
+
+	for (i = 0, p = btrfs_paths[i]; p; i++, p = btrfs_paths[i])
+		if (path_exists(p))
+			return p;
+
+	return NULL;
+}
+
+static int run_btrfs_subvolume_cmd(const char *subcmd, const char *arg1, const char *arg2)
+{
+	int status = 0;
+	const char *cmd = btrfs_cmd();
+	const char *argv[] = {
+		"btrfs",
+		"subvolume",
+		subcmd,
+		arg1,
+		arg2,
+		NULL
+	};
+
+	if (!cmd || access(cmd, X_OK)) {
+		return 1;
+	}
+
+	if (run_command(cmd, argv, NULL, &status))
+		return -1;
+	return status;
+}
+
+
+int btrfs_create_subvolume(const char *path)
+{
+	return run_btrfs_subvolume_cmd("create", path, NULL);
+}
+
+
+int btrfs_remove_subvolume(const char *path)
+{
+	return run_btrfs_subvolume_cmd("delete", "-C", path);
+}
+
+
+/* Adapted from btrfsprogs */
+/*
+ * This intentionally duplicates btrfs_util_is_subvolume_fd() instead of opening
+ * a file descriptor and calling it, because fstat() and fstatfs() don't accept
+ * file descriptors opened with O_PATH on old kernels (before v3.6 and before
+ * v3.12, respectively), but stat() and statfs() can be called on a path that
+ * the user doesn't have read or write permissions to.
+ *
+ * returns:
+ *   1 - btrfs subvolume
+ *   0 - not btrfs subvolume
+ *  -1 - error
+ */
+int btrfs_is_subvolume(const char *path)
+{
+	struct stat st;
+	int ret;
+
+	ret = is_btrfs(path);
+	if (ret <= 0)
+		return ret;
+
+	ret = stat(path, &st);
+	if (ret == -1)
+		return -1;
+
+	if (st.st_ino != BTRFS_FIRST_FREE_OBJECTID || !S_ISDIR(st.st_mode)) {
+		return 0;
+	}
+
+	return 1;
+}
+
+
+/* Adapted from btrfsprogs */
+int is_btrfs(const char *path)
+{
+	struct statfs sfs;
+	int ret;
+
+	ret = statfs(path, &sfs);
+	if (ret == -1)
+		return -1;
+
+	return sfs.f_type == BTRFS_SUPER_MAGIC;
+}
+
diff --git a/lib/cast.h b/lib/cast.h
new file mode 100644
index 0000000..5cbbcf6
--- /dev/null
+++ b/lib/cast.h
@@ -0,0 +1,15 @@
+// SPDX-FileCopyrightText: 2022-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_CAST_H_
+#define SHADOW_INCLUDE_LIB_CAST_H_
+
+
+#include <config.h>
+
+
+#define const_cast(T, p)  _Generic(p, const T:  (T) (p))
+
+
+#endif  // include guard
diff --git a/lib/chkname.c b/lib/chkname.c
new file mode 100644
index 0000000..995562f
--- /dev/null
+++ b/lib/chkname.c
@@ -0,0 +1,120 @@
+// SPDX-FileCopyrightText: 1990-1994, Julianne Frances Haugh
+// SPDX-FileCopyrightText: 1996-2000, Marek Michałkiewicz
+// SPDX-FileCopyrightText: 2001-2005, Tomasz Kłoczko
+// SPDX-FileCopyrightText: 2005-2008, Nicolas François
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+/*
+ * is_valid_user_name(), is_valid_group_name() - check the new user/group
+ * name for validity;
+ * return values:
+ *   true  - OK
+ *   false - bad name
+ */
+
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <ctype.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <unistd.h>
+
+#include "defines.h"
+#include "chkname.h"
+
+
+int allow_bad_names = false;
+
+
+size_t
+login_name_max_size(void)
+{
+	long  conf;
+
+	errno = 0;
+	conf = sysconf(_SC_LOGIN_NAME_MAX);
+	if (conf == -1 && errno != 0)
+		return LOGIN_NAME_MAX;
+
+	return conf;
+}
+
+
+static bool is_valid_name (const char *name)
+{
+	if (allow_bad_names) {
+		return true;
+	}
+
+	/*
+         * User/group names must match BRE regex:
+         *    [a-zA-Z0-9_.][a-zA-Z0-9_.-]*$\?
+         *
+         * as a non-POSIX, extension, allow "$" as the last char for
+         * sake of Samba 3.x "add machine script"
+         *
+         * Also do not allow fully numeric names or just "." or "..".
+         */
+	int numeric;
+
+	if ('\0' == *name ||
+	    ('.' == *name && (('.' == name[1] && '\0' == name[2]) ||
+			      '\0' == name[1])) ||
+	    !((*name >= 'a' && *name <= 'z') ||
+	      (*name >= 'A' && *name <= 'Z') ||
+	      (*name >= '0' && *name <= '9') ||
+	      *name == '_' ||
+	      *name == '.')) {
+		return false;
+	}
+
+	numeric = isdigit(*name);
+
+	while ('\0' != *++name) {
+		if (!((*name >= 'a' && *name <= 'z') ||
+		      (*name >= 'A' && *name <= 'Z') ||
+		      (*name >= '0' && *name <= '9') ||
+		      *name == '_' ||
+		      *name == '.' ||
+		      *name == '-' ||
+		      (*name == '$' && name[1] == '\0')
+		     )) {
+			return false;
+		}
+		numeric &= isdigit(*name);
+	}
+
+	return !numeric;
+}
+
+
+bool
+is_valid_user_name(const char *name)
+{
+	if (strlen(name) >= login_name_max_size())
+		return false;
+
+	return is_valid_name(name);
+}
+
+
+bool is_valid_group_name (const char *name)
+{
+	/*
+	 * Arbitrary limit for group names.
+	 * HP-UX 10 limits to 16 characters
+	 */
+	if (   (GROUP_NAME_MAX_LENGTH > 0)
+	    && (strlen (name) > GROUP_NAME_MAX_LENGTH)) {
+		return false;
+	}
+
+	return is_valid_name (name);
+}
diff --git a/lib/chkname.h b/lib/chkname.h
new file mode 100644
index 0000000..4306a8a
--- /dev/null
+++ b/lib/chkname.h
@@ -0,0 +1,34 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1997 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2005       , Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* $Id$ */
+#ifndef _CHKNAME_H_
+#define _CHKNAME_H_
+
+
+/*
+ * is_valid_user_name(), is_valid_group_name() - check the new user/group
+ * name for validity;
+ * return values:
+ *   true  - OK
+ *   false - bad name
+ */
+
+
+#include <config.h>
+
+#include <stdbool.h>
+#include <stddef.h>
+
+
+extern size_t login_name_max_size(void);
+extern bool is_valid_user_name (const char *name);
+extern bool is_valid_group_name (const char *name);
+
+#endif
diff --git a/lib/chowndir.c b/lib/chowndir.c
new file mode 100644
index 0000000..d31618a
--- /dev/null
+++ b/lib/chowndir.c
@@ -0,0 +1,146 @@
+/*
+ * SPDX-FileCopyrightText: 1992 - 1993, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2010 -     , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+static int chown_tree_at (int at_fd,
+                const char *path,
+                uid_t old_uid,
+                uid_t new_uid,
+                gid_t old_gid,
+                gid_t new_gid)
+{
+	DIR *dir;
+	const struct dirent *ent;
+	struct stat dir_sb;
+	int dir_fd, rc = 0;
+
+	dir_fd = openat (at_fd, path, O_RDONLY | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
+	if (dir_fd < 0) {
+		return -1;
+	}
+
+	dir = fdopendir (dir_fd);
+	if (!dir) {
+		(void) close (dir_fd);
+		return -1;
+	}
+
+	/*
+	 * Open the directory and read each entry.  Every entry is tested
+	 * to see if it is a directory, and if so this routine is called
+	 * recursively.  If not, it is checked to see if an ownership
+	 * shall be changed.
+	 */
+	while ((ent = readdir (dir))) {
+		uid_t tmpuid = (uid_t) -1;
+		gid_t tmpgid = (gid_t) -1;
+		struct stat ent_sb;
+
+		/*
+		 * Skip the "." and ".." entries
+		 */
+		if (   (strcmp (ent->d_name, ".") == 0)
+		    || (strcmp (ent->d_name, "..") == 0)) {
+			continue;
+		}
+
+		rc = fstatat (dirfd(dir), ent->d_name, &ent_sb, AT_SYMLINK_NOFOLLOW);
+		if (rc < 0) {
+			break;
+		}
+
+		if (S_ISDIR (ent_sb.st_mode)) {
+			/*
+			 * Do the entire subdirectory.
+			 */
+			rc = chown_tree_at (dirfd(dir), ent->d_name, old_uid, new_uid, old_gid, new_gid);
+			if (0 != rc) {
+				break;
+			}
+		}
+
+		/*
+		 * By default, the IDs are not changed (-1).
+		 *
+		 * If the file is not owned by the user, the owner is not
+		 * changed.
+		 *
+		 * If the file is not group-owned by the group, the
+		 * group-owner is not changed.
+		 */
+		if (((uid_t) -1 == old_uid) || (ent_sb.st_uid == old_uid)) {
+			tmpuid = new_uid;
+		}
+		if (((gid_t) -1 == old_gid) || (ent_sb.st_gid == old_gid)) {
+			tmpgid = new_gid;
+		}
+		if (((uid_t) -1 != tmpuid) || ((gid_t) -1 != tmpgid)) {
+			rc = fchownat (dirfd(dir), ent->d_name, tmpuid, tmpgid, AT_SYMLINK_NOFOLLOW);
+			if (0 != rc) {
+				break;
+			}
+		}
+	}
+
+	/*
+	 * Now do the root of the tree
+	 */
+	if ((0 == rc) && (fstat (dirfd(dir), &dir_sb) == 0)) {
+		uid_t tmpuid = (uid_t) -1;
+		gid_t tmpgid = (gid_t) -1;
+		if (((uid_t) -1 == old_uid) || (dir_sb.st_uid == old_uid)) {
+			tmpuid = new_uid;
+		}
+		if (((gid_t) -1 == old_gid) || (dir_sb.st_gid == old_gid)) {
+			tmpgid = new_gid;
+		}
+		if (((uid_t) -1 != tmpuid) || ((gid_t) -1 != tmpgid)) {
+			rc = fchown (dirfd(dir), tmpuid, tmpgid);
+		}
+	} else {
+		rc = -1;
+	}
+
+	(void) closedir (dir);
+
+	return rc;
+}
+
+/*
+ * chown_tree - change ownership of files in a directory tree
+ *
+ *	chown_dir() walks a directory tree and changes the ownership
+ *	of all files owned by the provided user ID.
+ *
+ *	Only files owned (resp. group-owned) by old_uid (resp. by old_gid)
+ *	will have their ownership (resp. group-ownership) modified, unless
+ *	old_uid (resp. old_gid) is set to -1.
+ *
+ *	new_uid and new_gid can be set to -1 to indicate that no owner or
+ *	group-owner shall be changed.
+ */
+int chown_tree (const char *root,
+                uid_t old_uid,
+                uid_t new_uid,
+                gid_t old_gid,
+                gid_t new_gid)
+{
+	return chown_tree_at (AT_FDCWD, root, old_uid, new_uid, old_gid, new_gid);
+}
diff --git a/lib/chowntty.c b/lib/chowntty.c
new file mode 100644
index 0000000..70127f3
--- /dev/null
+++ b/lib/chowntty.c
@@ -0,0 +1,79 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2001, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <errno.h>
+#include <grp.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+#include "getdef.h"
+#include "shadowlog.h"
+
+/*
+ *	chown_tty() sets the login tty to be owned by the new user ID
+ *	with TTYPERM modes
+ */
+
+void chown_tty (const struct passwd *info)
+{
+	struct group *grent;
+	gid_t gid;
+
+	/*
+	 * See if login.defs has some value configured for the port group
+	 * ID.  Otherwise, use the user's primary group ID.
+	 */
+
+	grent = getgr_nam_gid (getdef_str ("TTYGROUP"));
+	if (NULL != grent) {
+		gid = grent->gr_gid;
+		gr_free (grent);
+	} else {
+		gid = info->pw_gid;
+	}
+
+	/*
+	 * Change the permissions on the TTY to be owned by the user with
+	 * the group as determined above.
+	 */
+
+	if (   (fchown (STDIN_FILENO, info->pw_uid, gid) != 0)
+	    || (fchmod (STDIN_FILENO, getdef_num ("TTYPERM", 0600)) != 0)) {
+		int err = errno;
+		FILE *shadow_logfd = log_get_logfd();
+
+		fprintf (shadow_logfd,
+		         _("Unable to change owner or mode of tty stdin: %s"),
+		         strerror (err));
+		SYSLOG ((LOG_WARN,
+		         "unable to change owner or mode of tty stdin for user `%s': %s\n",
+		         info->pw_name, strerror (err)));
+		if (EROFS != err) {
+			closelog ();
+			exit (EXIT_FAILURE);
+		}
+	}
+#ifdef __linux__
+	/*
+	 * Please don't add code to chown /dev/vcs* to the user logging in -
+	 * it's a potential security hole.  I wouldn't like the previous user
+	 * to hold the file descriptor open and watch my screen.  We don't
+	 * have the *BSD revoke() system call yet, and vhangup() only works
+	 * for tty devices (which vcs* is not).  --marekm
+	 */
+#endif
+}
+
diff --git a/lib/cleanup.c b/lib/cleanup.c
new file mode 100644
index 0000000..c16f1bc
--- /dev/null
+++ b/lib/cleanup.c
@@ -0,0 +1,121 @@
+/*
+ * SPDX-FileCopyrightText: 2008 - 2011, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <assert.h>
+#include <stdio.h>
+
+#include "prototypes.h"
+
+/*
+ * The cleanup_functions stack.
+ */
+#define CLEANUP_FUNCTIONS 10
+
+typedef /*@null@*/void * parg_t;
+
+static cleanup_function cleanup_functions[CLEANUP_FUNCTIONS];
+static parg_t cleanup_function_args[CLEANUP_FUNCTIONS];
+static pid_t cleanup_pid = 0;
+
+/*
+ * - Cleanup functions shall not fail.
+ * - You should register do_cleanups with atexit.
+ * - You should add cleanup functions to the stack with add_cleanup when
+ *   an operation is expected to be executed later, and remove it from the
+ *   stack with del_cleanup when it has been executed.
+ *
+ **/
+
+/*
+ * do_cleanups - perform the actions stored in the cleanup_functions stack.
+ *
+ * Cleanup action are not executed on exit of the processes started by the
+ * parent (first caller of add_cleanup).
+ *
+ * It is intended to be used as:
+ *     atexit (do_cleanups);
+ */
+void do_cleanups (void)
+{
+	unsigned int i;
+
+	/* Make sure there were no overflow */
+	assert (NULL == cleanup_functions[CLEANUP_FUNCTIONS-1]);
+
+	if (getpid () != cleanup_pid) {
+		return;
+	}
+
+	i = CLEANUP_FUNCTIONS;
+	do {
+		i--;
+		if (cleanup_functions[i] != NULL) {
+			cleanup_functions[i] (cleanup_function_args[i]);
+		}
+	} while (i>0);
+}
+
+/*
+ * add_cleanup - Add a cleanup_function to the cleanup_functions stack.
+ */
+void add_cleanup (/*@notnull@*/cleanup_function pcf, /*@null@*/void *arg)
+{
+	unsigned int i;
+	assert (NULL != pcf);
+
+	assert (NULL == cleanup_functions[CLEANUP_FUNCTIONS-2]);
+
+	if (0 == cleanup_pid) {
+		cleanup_pid = getpid ();
+	}
+
+	/* Add the cleanup_function at the end of the stack */
+	for (i=0; NULL != cleanup_functions[i]; i++);
+	cleanup_functions[i] = pcf;
+	cleanup_function_args[i] = arg;
+}
+
+/*
+ * del_cleanup - Remove a cleanup_function from the cleanup_functions stack.
+ */
+void del_cleanup (/*@notnull@*/cleanup_function pcf)
+{
+	unsigned int i;
+	assert (NULL != pcf);
+
+	/* Find the pcf cleanup function */
+	for (i=0; i<CLEANUP_FUNCTIONS; i++) {
+		if (cleanup_functions[i] == pcf) {
+			break;
+		}
+	}
+
+	/* Make sure the cleanup function was found */
+	assert (i<CLEANUP_FUNCTIONS);
+
+	/* Move the rest of the cleanup functions */
+	for (; i<CLEANUP_FUNCTIONS; i++) {
+		/* Make sure the cleanup function was specified only once */
+		assert (   (i == (CLEANUP_FUNCTIONS -1))
+		        || (cleanup_functions[i+1] != pcf));
+
+		if (i == (CLEANUP_FUNCTIONS -1)) {
+			cleanup_functions[i] = NULL;
+			cleanup_function_args[i] = NULL;
+		} else {
+			cleanup_functions[i] = cleanup_functions[i+1];
+			cleanup_function_args[i] = cleanup_function_args[i+1];
+		}
+
+		/* A NULL indicates the end of the stack */
+		if (NULL == cleanup_functions[i]) {
+			break;
+		}
+	}
+}
+
diff --git a/lib/cleanup_group.c b/lib/cleanup_group.c
new file mode 100644
index 0000000..50c7084
--- /dev/null
+++ b/lib/cleanup_group.c
@@ -0,0 +1,216 @@
+/*
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <assert.h>
+#include <stdio.h>
+
+#include "attr.h"
+#include "defines.h"
+#include "groupio.h"
+#include "sgroupio.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+/*
+ * cleanup_report_add_group - Report failure to add a group to the system
+ *
+ * It should be registered when it is decided to add a group to the system.
+ */
+void cleanup_report_add_group (void *group_name)
+{
+	const char *name = group_name;
+
+	SYSLOG ((LOG_ERR, "failed to add group %s", name));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_GROUP, log_get_progname(),
+	              "",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+/*
+ * cleanup_report_del_group - Report failure to remove a group from the system
+ *
+ * It should be registered when it is decided to remove a group from the system.
+ */
+void cleanup_report_del_group (void *group_name)
+{
+	const char *name = group_name;
+
+	SYSLOG ((LOG_ERR, "failed to remove group %s", name));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_DEL_GROUP, log_get_progname(),
+	              "",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+void cleanup_report_mod_group (void *cleanup_info)
+{
+	const struct cleanup_info_mod *info;
+	info = (const struct cleanup_info_mod *)cleanup_info;
+
+	SYSLOG ((LOG_ERR,
+	         "failed to change %s (%s)",
+	         gr_dbname (),
+	         info->action));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_USER_ACCT, log_get_progname(),
+	              info->audit_msg,
+	              info->name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+#ifdef SHADOWGRP
+void cleanup_report_mod_gshadow (void *cleanup_info)
+{
+	const struct cleanup_info_mod *info;
+	info = (const struct cleanup_info_mod *)cleanup_info;
+
+	SYSLOG ((LOG_ERR,
+	         "failed to change %s (%s)",
+	         sgr_dbname (),
+	         info->action));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_USER_ACCT, log_get_progname(),
+	              info->audit_msg,
+	              info->name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+#endif
+
+/*
+ * cleanup_report_add_group_group - Report failure to add a group to group
+ *
+ * It should be registered when it is decided to add a group to the
+ * group database.
+ */
+void cleanup_report_add_group_group (void *group_name)
+{
+	const char *name = group_name;
+
+	SYSLOG ((LOG_ERR, "failed to add group %s to %s", name, gr_dbname ()));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_GROUP, log_get_progname(),
+	              "adding group to /etc/group",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+#ifdef SHADOWGRP
+/*
+ * cleanup_report_add_group_gshadow - Report failure to add a group to gshadow
+ *
+ * It should be registered when it is decided to add a group to the
+ * gshadow database.
+ */
+void cleanup_report_add_group_gshadow (void *group_name)
+{
+	const char *name = group_name;
+
+	SYSLOG ((LOG_ERR, "failed to add group %s to %s", name, sgr_dbname ()));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_GROUP, log_get_progname(),
+	              "adding group to /etc/gshadow",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+#endif
+
+/*
+ * cleanup_report_del_group_group - Report failure to remove a group from the
+ *                                  regular group database
+ *
+ * It should be registered when it is decided to remove a group from the
+ * regular group database.
+ */
+void cleanup_report_del_group_group (void *group_name)
+{
+	const char *name = group_name;
+
+	SYSLOG ((LOG_ERR,
+	         "failed to remove group %s from %s",
+	         name, gr_dbname ()));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_GROUP, log_get_progname(),
+	              "removing group from /etc/group",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+#ifdef SHADOWGRP
+/*
+ * cleanup_report_del_group_gshadow - Report failure to remove a group from
+ *                                    gshadow
+ *
+ * It should be registered when it is decided to remove a group from the
+ * gshadow database.
+ */
+void cleanup_report_del_group_gshadow (void *group_name)
+{
+	const char *name = group_name;
+
+	SYSLOG ((LOG_ERR,
+	         "failed to remove group %s from %s",
+	         name, sgr_dbname ()));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_GROUP, log_get_progname(),
+	              "removing group from /etc/gshadow",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+#endif
+
+/*
+ * cleanup_unlock_group - Unlock the group file
+ *
+ * It should be registered after the group file is successfully locked.
+ */
+void cleanup_unlock_group (MAYBE_UNUSED void *arg)
+{
+	if (gr_unlock () == 0) {
+		fprintf (log_get_logfd(),
+		         _("%s: failed to unlock %s\n"),
+		         log_get_progname(), gr_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", gr_dbname ()));
+#ifdef WITH_AUDIT
+		audit_logger_message ("unlocking group file",
+		                      SHADOW_AUDIT_FAILURE);
+#endif
+	}
+}
+
+#ifdef SHADOWGRP
+/*
+ * cleanup_unlock_gshadow - Unlock the gshadow file
+ *
+ * It should be registered after the gshadow file is successfully locked.
+ */
+void cleanup_unlock_gshadow (MAYBE_UNUSED void *arg)
+{
+	if (sgr_unlock () == 0) {
+		fprintf (log_get_logfd(),
+		         _("%s: failed to unlock %s\n"),
+		         log_get_progname(), sgr_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", sgr_dbname ()));
+#ifdef WITH_AUDIT
+		audit_logger_message ("unlocking gshadow file",
+		                      SHADOW_AUDIT_FAILURE);
+#endif
+	}
+}
+#endif
+
diff --git a/lib/cleanup_user.c b/lib/cleanup_user.c
new file mode 100644
index 0000000..9c4bda9
--- /dev/null
+++ b/lib/cleanup_user.c
@@ -0,0 +1,131 @@
+/*
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <assert.h>
+#include <stdio.h>
+
+#include "attr.h"
+#include "defines.h"
+#include "pwio.h"
+#include "shadowio.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+/*
+ * cleanup_report_add_user - Report failure to add a user to the system
+ *
+ * It should be registered when it is decided to add a user to the system.
+ */
+void cleanup_report_add_user (void *user_name)
+{
+	const char *name = user_name;
+
+	SYSLOG ((LOG_ERR, "failed to add user %s", name));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_USER, log_get_progname(),
+	              "",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+void cleanup_report_mod_passwd (void *cleanup_info)
+{
+	const struct cleanup_info_mod *info;
+	info = (const struct cleanup_info_mod *)cleanup_info;
+
+	SYSLOG ((LOG_ERR,
+	         "failed to change %s (%s)",
+	         pw_dbname (),
+	         info->action));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_USER_ACCT, log_get_progname(),
+	              info->audit_msg,
+	              info->name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+/*
+ * cleanup_report_add_user_passwd - Report failure to add a user to
+ * /etc/passwd
+ *
+ * It should be registered when it is decided to add a user to the
+ * /etc/passwd database.
+ */
+void cleanup_report_add_user_passwd (void *user_name)
+{
+	const char *name = user_name;
+
+	SYSLOG ((LOG_ERR, "failed to add user %s to %s", name, pw_dbname ()));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_USER, log_get_progname(),
+	              "adding user to /etc/passwd",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+/*
+ * cleanup_report_add_user_shadow - Report failure to add a user to
+ * /etc/shadow
+ *
+ * It should be registered when it is decided to add a user to the
+ * /etc/shadow database.
+ */
+void cleanup_report_add_user_shadow (void *user_name)
+{
+	const char *name = user_name;
+
+	SYSLOG ((LOG_ERR, "failed to add user %s to %s", name, spw_dbname ()));
+#ifdef WITH_AUDIT
+	audit_logger (AUDIT_ADD_USER, log_get_progname(),
+	              "adding user to /etc/shadow",
+	              name, AUDIT_NO_ID,
+	              SHADOW_AUDIT_FAILURE);
+#endif
+}
+
+/*
+ * cleanup_unlock_passwd - Unlock the /etc/passwd database
+ *
+ * It should be registered after the passwd database is successfully locked.
+ */
+void cleanup_unlock_passwd (MAYBE_UNUSED void *arg)
+{
+	if (pw_unlock () == 0) {
+		fprintf (log_get_logfd(),
+		         _("%s: failed to unlock %s\n"),
+		         log_get_progname(), pw_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", pw_dbname ()));
+#ifdef WITH_AUDIT
+		audit_logger_message ("unlocking passwd file",
+		                      SHADOW_AUDIT_FAILURE);
+#endif
+	}
+}
+
+/*
+ * cleanup_unlock_shadow - Unlock the /etc/shadow database
+ *
+ * It should be registered after the shadow database is successfully locked.
+ */
+void cleanup_unlock_shadow (MAYBE_UNUSED void *arg)
+{
+	if (spw_unlock () == 0) {
+		fprintf (log_get_logfd(),
+		         _("%s: failed to unlock %s\n"),
+		         log_get_progname(), spw_dbname ());
+		SYSLOG ((LOG_ERR, "failed to unlock %s", spw_dbname ()));
+#ifdef WITH_AUDIT
+		audit_logger_message ("unlocking shadow file",
+		                      SHADOW_AUDIT_FAILURE);
+#endif
+	}
+}
+
diff --git a/lib/commonio.c b/lib/commonio.c
index 9a02ce1..01a26c9 100644
--- a/lib/commonio.c
+++ b/lib/commonio.c
@@ -21,6 +21,9 @@
 #include <errno.h>
 #include <stdio.h>
 #include <signal.h>
+
+#include "alloc.h"
+#include "memzero.h"
 #include "nscd.h"
 #include "sssd.h"
 #ifdef WITH_TCB
@@ -29,6 +32,8 @@
 #include "prototypes.h"
 #include "commonio.h"
 #include "shadowlog_internal.h"
+#include "string/sprintf.h"
+
 
 /* local function prototypes */
 static int lrename (const char *, const char *);
@@ -106,9 +111,9 @@ static int check_link_count (const char *file, bool log)
 
 	if (sb.st_nlink != 2) {
 		if (log) {
-			(void) fprintf (shadow_logfd,
-			                "%s: %s: lock file already used (nlink: %u)\n",
-			                shadow_progname, file, sb.st_nlink);
+			fprintf(shadow_logfd,
+			        "%s: %s: lock file already used (nlink: %ju)\n",
+			        shadow_progname, file, (uintmax_t) sb.st_nlink);
 		}
 		return 0;
 	}
@@ -119,11 +124,11 @@ static int check_link_count (const char *file, bool log)
 
 static int do_lock_file (const char *file, const char *lock, bool log)
 {
-	int fd;
-	pid_t pid;
-	ssize_t len;
-	int retval;
-	char buf[32];
+	int      fd;
+	int      retval;
+	char     buf[32];
+	pid_t    pid;
+	ssize_t  len;
 
 	fd = open (file, O_CREAT | O_TRUNC | O_WRONLY, 0600);
 	if (-1 == fd) {
@@ -136,9 +141,9 @@ static int do_lock_file (const char *file, const char *lock, bool log)
 	}
 
 	pid = getpid ();
-	snprintf (buf, sizeof buf, "%lu", (unsigned long) pid);
+	SNPRINTF(buf, "%lu", (unsigned long) pid);
 	len = (ssize_t) strlen (buf) + 1;
-	if (write (fd, buf, (size_t) len) != len) {
+	if (write_full(fd, buf, len) == -1) {
 		if (log) {
 			(void) fprintf (shadow_logfd,
 			                "%s: %s file write error: %s\n",
@@ -190,7 +195,7 @@ static int do_lock_file (const char *file, const char *lock, bool log)
 		return 0;
 	}
 	buf[len] = '\0';
-	if (get_pid (buf, &pid) == 0) {
+	if (get_pid(buf, &pid) == -1) {
 		if (log) {
 			(void) fprintf (shadow_logfd,
 			                "%s: existing lock file %s with an invalid PID '%s'\n",
@@ -251,25 +256,13 @@ static /*@null@*/ /*@dependent@*/FILE *fopen_set_perms (
 		return NULL;
 	}
 
-#ifdef HAVE_FCHOWN
 	if (fchown (fileno (fp), sb->st_uid, sb->st_gid) != 0) {
 		goto fail;
 	}
-#else				/* !HAVE_FCHOWN */
-	if (chown (name, sb->st_mode) != 0) {
-		goto fail;
-	}
-#endif				/* !HAVE_FCHOWN */
-
-#ifdef HAVE_FCHMOD
 	if (fchmod (fileno (fp), sb->st_mode & 0664) != 0) {
 		goto fail;
 	}
-#else				/* !HAVE_FCHMOD */
-	if (chmod (name, sb->st_mode & 0664) != 0) {
-		goto fail;
-	}
-#endif				/* !HAVE_FCHMOD */
+
 	return fp;
 
       fail:
@@ -349,7 +342,7 @@ static void free_linked_list (struct commonio_db *db)
 
 int commonio_setname (struct commonio_db *db, const char *name)
 {
-	snprintf (db->filename, sizeof (db->filename), "%s", name);
+	SNPRINTF(db->filename, "%s", name);
 	db->setname = true;
 	return 1;
 }
@@ -363,33 +356,25 @@ bool commonio_present (const struct commonio_db *db)
 
 int commonio_lock_nowait (struct commonio_db *db, bool log)
 {
-	char* file = NULL;
-	char* lock = NULL;
-	size_t lock_file_len;
-	size_t file_len;
-	int err = 0;
+	int   err = 0;
+	char  *file = NULL;
+	char  *lock = NULL;
 
 	if (db->locked) {
 		return 1;
 	}
-	file_len = strlen(db->filename) + 11;/* %lu max size */
-	lock_file_len = strlen(db->filename) + 6; /* sizeof ".lock" */
-	file = (char*)malloc(file_len);
-	if (file == NULL) {
+
+	if (asprintf(&file, "%s.%ju", db->filename, (uintmax_t) getpid()) == -1)
 		goto cleanup_ENOMEM;
-	}
-	lock = (char*)malloc(lock_file_len);
-	if (lock == NULL) {
+	if (asprintf(&lock, "%s.lock", db->filename) == -1)
 		goto cleanup_ENOMEM;
-	}
-	snprintf (file, file_len, "%s.%lu",
-	          db->filename, (unsigned long) getpid ());
-	snprintf (lock, lock_file_len, "%s.lock", db->filename);
+
 	if (do_lock_file (file, lock, log) != 0) {
 		db->locked = true;
 		lock_count++;
 		err = 1;
 	}
+
 cleanup_ENOMEM:
 	free(file);
 	free(lock);
@@ -483,7 +468,7 @@ static void dec_lock_count (void)
 
 int commonio_unlock (struct commonio_db *db)
 {
-	char lock[1024];
+	char  lock[1029];
 
 	if (db->isopen) {
 		db->readonly = true;
@@ -500,7 +485,7 @@ int commonio_unlock (struct commonio_db *db)
 		 * then call ulckpwdf() (if used) on last unlock.
 		 */
 		db->locked = false;
-		snprintf (lock, sizeof lock, "%s.lock", db->filename);
+		SNPRINTF(lock, "%s.lock", db->filename);
 		unlink (lock);
 		dec_lock_count ();
 		return 1;
@@ -618,7 +603,7 @@ int commonio_open (struct commonio_db *db, int mode)
 
 	fd = open (db->filename,
 	             (db->readonly ? O_RDONLY : O_RDWR)
-	           | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW);
+	           | O_NOCTTY | O_NONBLOCK | O_NOFOLLOW | O_CLOEXEC);
 	saved_errno = errno;
 	db->fp = NULL;
 	if (fd >= 0) {
@@ -649,22 +634,19 @@ int commonio_open (struct commonio_db *db, int mode)
 		return 0;
 	}
 
-	/* Do not inherit fd in spawned processes (e.g. nscd) */
-	fcntl (fileno (db->fp), F_SETFD, FD_CLOEXEC);
-
 	buflen = BUFLEN;
-	buf = (char *) malloc (buflen);
+	buf = MALLOC(buflen, char);
 	if (NULL == buf) {
 		goto cleanup_ENOMEM;
 	}
 
-	while (db->ops->fgets (buf, (int) buflen, db->fp) == buf) {
-		while (   ((cp = strrchr (buf, '\n')) == NULL)
+	while (db->ops->fgets (buf, buflen, db->fp) == buf) {
+		while (   (strrchr (buf, '\n') == NULL)
 		       && (feof (db->fp) == 0)) {
 			size_t len;
 
 			buflen += BUFLEN;
-			cp = (char *) realloc (buf, buflen);
+			cp = REALLOC(buf, buflen, char);
 			if (NULL == cp) {
 				goto cleanup_buf;
 			}
@@ -698,7 +680,7 @@ int commonio_open (struct commonio_db *db, int mode)
 			}
 		}
 
-		p = (struct commonio_entry *) malloc (sizeof *p);
+		p = MALLOC(1, struct commonio_entry);
 		if (NULL == p) {
 			goto cleanup_entry;
 		}
@@ -775,7 +757,7 @@ commonio_sort (struct commonio_db *db, int (*cmp) (const void *, const void *))
 		return 0;
 	}
 
-	entries = malloc (n * sizeof (struct commonio_entry *));
+	entries = MALLOC(n, struct commonio_entry *);
 	if (entries == NULL) {
 		return -1;
 	}
@@ -912,9 +894,9 @@ static int write_all (const struct commonio_db *db)
 
 int commonio_close (struct commonio_db *db)
 {
-	char buf[1024];
-	int errors = 0;
-	struct stat sb;
+	int          errors = 0;
+	char         buf[1024];
+	struct stat  sb;
 
 	if (!db->isopen) {
 		errno = EINVAL;
@@ -945,7 +927,11 @@ int commonio_close (struct commonio_db *db)
 		/*
 		 * Create backup file.
 		 */
-		snprintf (buf, sizeof buf, "%s-", db->filename);
+		if (SNPRINTF(buf, "%s-", db->filename) == -1) {
+			(void) fclose (db->fp);
+			db->fp = NULL;
+			goto fail;
+		}
 
 #ifdef WITH_SELINUX
 		if (set_selinux_file_context (db->filename, S_IFREG) != 0) {
@@ -960,15 +946,15 @@ int commonio_close (struct commonio_db *db)
 			errors++;
 		}
 
+		db->fp = NULL;
+
 #ifdef WITH_SELINUX
 		if (reset_selinux_file_context () != 0) {
 			errors++;
 		}
 #endif
-		if (errors != 0) {
-			db->fp = NULL;
+		if (errors != 0)
 			goto fail;
-		}
 	} else {
 		/*
 		 * Default permissions for new [g]shadow files.
@@ -978,7 +964,8 @@ int commonio_close (struct commonio_db *db)
 		sb.st_gid = db->st_gid;
 	}
 
-	snprintf (buf, sizeof buf, "%s+", db->filename);
+	if (SNPRINTF(buf, "%s+", db->filename) == -1)
+		goto fail;
 
 #ifdef WITH_SELINUX
 	if (set_selinux_file_context (db->filename, S_IFREG) != 0) {
@@ -998,13 +985,11 @@ int commonio_close (struct commonio_db *db)
 	if (fflush (db->fp) != 0) {
 		errors++;
 	}
-#ifdef HAVE_FSYNC
+
 	if (fsync (fileno (db->fp)) != 0) {
 		errors++;
 	}
-#else				/* !HAVE_FSYNC */
-	sync ();
-#endif				/* !HAVE_FSYNC */
+
 	if (fclose (db->fp) != 0) {
 		errors++;
 	}
@@ -1096,7 +1081,7 @@ int commonio_update (struct commonio_db *db, const void *eptr)
 		return 1;
 	}
 	/* not found, new entry */
-	p = (struct commonio_entry *) malloc (sizeof *p);
+	p = MALLOC(1, struct commonio_entry);
 	if (NULL == p) {
 		db->ops->free (nentry);
 		errno = ENOMEM;
@@ -1133,7 +1118,7 @@ int commonio_append (struct commonio_db *db, const void *eptr)
 		return 0;
 	}
 	/* new entry */
-	p = (struct commonio_entry *) malloc (sizeof *p);
+	p = MALLOC(1, struct commonio_entry);
 	if (NULL == p) {
 		db->ops->free (nentry);
 		errno = ENOMEM;
@@ -1200,6 +1185,8 @@ int commonio_remove (struct commonio_db *db, const char *name)
 		db->ops->free (p->eptr);
 	}
 
+	free(p);
+
 	return 1;
 }
 
diff --git a/lib/commonio.h b/lib/commonio.h
index e63c5b4..fedbefa 100644
--- a/lib/commonio.h
+++ b/lib/commonio.h
@@ -11,8 +11,11 @@
 #ifndef COMMONIO_H
 #define COMMONIO_H
 
+
+#include "attr.h"
 #include "defines.h" /* bool */
 
+
 /*
  * Linked list entry.
  */
@@ -37,7 +40,7 @@ struct commonio_ops {
 	/*
 	 * free() the object including any strings pointed by it.
 	 */
-	void (*free) (/*@out@*/ /*@only@*/void *);
+	void (*free)(/*@only@*/void *);
 
 	/*
 	 * Return the name of the object (for example, pw_name
@@ -61,7 +64,9 @@ struct commonio_ops {
 	 * fgets and fputs (can be replaced by versions that
 	 * understand line continuation conventions).
 	 */
-	/*@null@*/char *(*fgets) (/*@returned@*/ /*@out@*/char *s, int n, FILE *stream);
+	ATTR_ACCESS(write_only, 1, 2)
+	/*@null@*/char *(*fgets)(/*@returned@*/char *restrict s, int n,
+	                         FILE *restrict stream);
 	int (*fputs) (const char *, FILE *);
 
 	/*
@@ -123,6 +128,7 @@ extern int commonio_setname (struct commonio_db *, const char *);
 extern bool commonio_present (const struct commonio_db *db);
 extern int commonio_lock (struct commonio_db *);
 extern int commonio_lock_nowait (struct commonio_db *, bool log);
+extern int do_fcntl_lock (const char *file, bool log, short type);
 extern int commonio_open (struct commonio_db *, int);
 extern /*@observer@*/ /*@null@*/const void *commonio_locate (struct commonio_db *, const char *);
 extern int commonio_update (struct commonio_db *, const void *);
diff --git a/lib/console.c b/lib/console.c
new file mode 100644
index 0000000..92065d9
--- /dev/null
+++ b/lib/console.c
@@ -0,0 +1,109 @@
+/*
+ * SPDX-FileCopyrightText: 1991       , Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1991       , Chip Rosenthal
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+#include "defines.h"
+#include <stdio.h>
+#include "getdef.h"
+#include "prototypes.h"
+#include "string/strtcpy.h"
+
+#ident "$Id$"
+
+/*
+ * This is now rather generic function which decides if "tty" is listed
+ * under "cfgin" in config (directly or indirectly). Fallback to default if
+ * something is bad.
+ */
+static bool is_listed (const char *cfgin, const char *tty, bool def)
+{
+	FILE *fp;
+	char buf[1024], *s;
+	const char *cons;
+
+	/*
+	 * If the CONSOLE configuration definition isn't given,
+	 * fallback to default.
+	 */
+
+	cons = getdef_str (cfgin);
+	if (NULL == cons) {
+		return def;
+	}
+
+	/*
+	 * If this isn't a filename, then it is a ":" delimited list of
+	 * console devices upon which root logins are allowed.
+	 */
+
+	if (*cons != '/') {
+		char *pbuf;
+		STRTCPY(buf, cons);
+		pbuf = &buf[0];
+		while ((s = strtok (pbuf, ":")) != NULL) {
+			if (strcmp (s, tty) == 0) {
+				return true;
+			}
+
+			pbuf = NULL;
+		}
+		return false;
+	}
+
+	/*
+	 * If we can't open the console list, then call everything a
+	 * console - otherwise root will never be allowed to login.
+	 */
+
+	fp = fopen (cons, "r");
+	if (NULL == fp) {
+		return def;
+	}
+
+	/*
+	 * See if this tty is listed in the console file.
+	 */
+
+	while (fgets (buf, sizeof (buf), fp) != NULL) {
+		/* Remove optional trailing '\n'. */
+		buf[strcspn (buf, "\n")] = '\0';
+		if (strcmp (buf, tty) == 0) {
+			(void) fclose (fp);
+			return true;
+		}
+	}
+
+	/*
+	 * This tty isn't a console.
+	 */
+
+	(void) fclose (fp);
+	return false;
+}
+
+/*
+ * console - return 1 if the "tty" is a console device, else 0.
+ *
+ * Note - we need to take extreme care here to avoid locking out root logins
+ * if something goes awry.  That's why we do things like call everything a
+ * console if the consoles file can't be opened.  Because of this, we must
+ * warn the user to protect against the remove of the consoles file since
+ * that would allow an unauthorized root login.
+ */
+
+bool console (const char *tty)
+{
+	if (strncmp (tty, "/dev/", 5) == 0) {
+		tty += 5;
+	}
+
+	return is_listed ("CONSOLE", tty, true);
+}
+
diff --git a/lib/copydir.c b/lib/copydir.c
new file mode 100644
index 0000000..926033a
--- /dev/null
+++ b/lib/copydir.c
@@ -0,0 +1,925 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2001, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+#include "alloc.h"
+#include "attr.h"
+#include "prototypes.h"
+#include "defines.h"
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#endif				/* WITH_SELINUX */
+#if defined(WITH_ACL) || defined(WITH_ATTR)
+#include <stdarg.h>
+#include <attr/error_context.h>
+#endif				/* WITH_ACL || WITH_ATTR */
+#ifdef WITH_ACL
+#include <acl/libacl.h>
+#endif				/* WITH_ACL */
+#ifdef WITH_ATTR
+#include <attr/libattr.h>
+#endif				/* WITH_ATTR */
+#include "shadowlog.h"
+#include "string/sprintf.h"
+
+
+static /*@null@*/const char *src_orig;
+static /*@null@*/const char *dst_orig;
+
+struct link_name {
+	dev_t ln_dev;
+	ino_t ln_ino;
+	nlink_t ln_count;
+	char *ln_name;
+	/*@dependent@*/struct link_name *ln_next;
+};
+static /*@exposed@*/struct link_name *links;
+
+struct path_info {
+	const char *full_path;
+	int dirfd;
+	const char *name;
+};
+
+static int copy_entry (const struct path_info *src, const struct path_info *dst,
+                       bool reset_selinux,
+                       uid_t old_uid, uid_t new_uid,
+                       gid_t old_gid, gid_t new_gid);
+static int copy_dir (const struct path_info *src, const struct path_info *dst,
+                     bool reset_selinux,
+                     const struct stat *statp, const struct timespec mt[],
+                     uid_t old_uid, uid_t new_uid,
+                     gid_t old_gid, gid_t new_gid);
+static /*@null@*/char *readlink_malloc (const char *filename);
+static int copy_symlink (const struct path_info *src, const struct path_info *dst,
+                         MAYBE_UNUSED bool reset_selinux,
+                         const struct stat *statp, const struct timespec mt[],
+                         uid_t old_uid, uid_t new_uid,
+                         gid_t old_gid, gid_t new_gid);
+static int copy_hardlink (const struct path_info *dst,
+                          MAYBE_UNUSED bool reset_selinux,
+                          struct link_name *lp);
+static int copy_special (const struct path_info *src, const struct path_info *dst,
+                         bool reset_selinux,
+                         const struct stat *statp, const struct timespec mt[],
+                         uid_t old_uid, uid_t new_uid,
+                         gid_t old_gid, gid_t new_gid);
+static int copy_file (const struct path_info *src, const struct path_info *dst,
+                      bool reset_selinux,
+                      const struct stat *statp, const struct timespec mt[],
+                      uid_t old_uid, uid_t new_uid,
+                      gid_t old_gid, gid_t new_gid);
+static int chownat_if_needed (const struct path_info *dst, const struct stat *statp,
+                            uid_t old_uid, uid_t new_uid,
+                            gid_t old_gid, gid_t new_gid);
+static int fchown_if_needed (int fdst, const struct stat *statp,
+                             uid_t old_uid, uid_t new_uid,
+                             gid_t old_gid, gid_t new_gid);
+
+#if defined(WITH_ACL) || defined(WITH_ATTR)
+/*
+ * error_acl - format the error messages for the ACL and EQ libraries.
+ */
+format_attr(printf, 2, 3)
+static void error_acl (MAYBE_UNUSED struct error_context *ctx, const char *fmt, ...)
+{
+	va_list ap;
+	FILE *shadow_logfd = log_get_logfd();
+
+	/* ignore the case when destination does not support ACLs
+	 * or extended attributes */
+	if (ENOTSUP == errno) {
+		errno = 0;
+		return;
+	}
+
+	va_start (ap, fmt);
+	(void) fprintf (shadow_logfd, _("%s: "), log_get_progname());
+	if (vfprintf (shadow_logfd, fmt, ap) != 0) {
+		(void) fputs (_(": "), shadow_logfd);
+	}
+	(void) fprintf (shadow_logfd, "%s\n", strerror (errno));
+	va_end (ap);
+}
+
+static struct error_context ctx = {
+	error_acl, NULL, NULL
+};
+#endif				/* WITH_ACL || WITH_ATTR */
+
+#ifdef WITH_ACL
+static int perm_copy_path(const struct path_info *src,
+						  const struct path_info *dst,
+						  struct error_context *errctx)
+{
+	int src_fd, dst_fd, ret;
+
+	src_fd = openat(src->dirfd, src->name, O_RDONLY | O_NOFOLLOW | O_NONBLOCK | O_CLOEXEC);
+	if (src_fd < 0) {
+		return -1;
+	}
+
+	dst_fd = openat(dst->dirfd, dst->name, O_RDONLY | O_NOFOLLOW | O_NONBLOCK | O_CLOEXEC);
+	if (dst_fd < 0) {
+		(void) close (src_fd);
+		return -1;
+	}
+
+	ret = perm_copy_fd(src->full_path, src_fd, dst->full_path, dst_fd, errctx);
+	(void) close (src_fd);
+	(void) close (dst_fd);
+	return ret;
+}
+#endif				/* WITH_ACL */
+
+#ifdef WITH_ATTR
+static int attr_copy_path(const struct path_info *src,
+						  const struct path_info *dst,
+						  int (*callback) (const char *, struct error_context *),
+						  struct error_context *errctx)
+{
+	int src_fd, dst_fd, ret;
+
+	src_fd = openat(src->dirfd, src->name, O_RDONLY | O_NOFOLLOW | O_NONBLOCK | O_CLOEXEC);
+	if (src_fd < 0) {
+		return -1;
+	}
+
+	dst_fd = openat(dst->dirfd, dst->name, O_RDONLY | O_NOFOLLOW | O_NONBLOCK | O_CLOEXEC);
+	if (dst_fd < 0) {
+		(void) close (src_fd);
+		return -1;
+	}
+
+	ret = attr_copy_fd(src->full_path, src_fd, dst->full_path, dst_fd, callback, errctx);
+	(void) close (src_fd);
+	(void) close (dst_fd);
+	return ret;
+}
+#endif				/* WITH_ATTR */
+
+/*
+ * remove_link - delete a link from the linked list
+ */
+static void remove_link (/*@only@*/struct link_name *ln)
+{
+	struct link_name *lp;
+
+	if (links == ln) {
+		links = ln->ln_next;
+		free (ln->ln_name);
+		free (ln);
+		return;
+	}
+	for (lp = links; NULL !=lp; lp = lp->ln_next) {
+		if (lp->ln_next == ln) {
+			break;
+		}
+	}
+
+	if (NULL == lp) {
+		free (ln->ln_name);
+		free (ln);
+		return;
+	}
+
+	lp->ln_next = lp->ln_next->ln_next;
+	free (ln->ln_name);
+	free (ln);
+}
+
+/*
+ * check_link - see if a file is really a link
+ */
+
+static /*@exposed@*/ /*@null@*/struct link_name *check_link (const char *name, const struct stat *sb)
+{
+	struct link_name  *lp;
+
+	/* copy_tree () must be the entry point */
+	assert (NULL != src_orig);
+	assert (NULL != dst_orig);
+
+	for (lp = links; NULL != lp; lp = lp->ln_next) {
+		if ((lp->ln_dev == sb->st_dev) && (lp->ln_ino == sb->st_ino)) {
+			return lp;
+		}
+	}
+
+	if (sb->st_nlink == 1) {
+		return NULL;
+	}
+
+	lp = XMALLOC(1, struct link_name);
+	lp->ln_dev = sb->st_dev;
+	lp->ln_ino = sb->st_ino;
+	lp->ln_count = sb->st_nlink;
+	xasprintf(&lp->ln_name, "%s%s", dst_orig, name + strlen(src_orig));
+	lp->ln_next = links;
+	links = lp;
+
+	return NULL;
+}
+
+static int copy_tree_impl (const struct path_info *src, const struct path_info *dst,
+               bool copy_root, bool reset_selinux,
+               uid_t old_uid, uid_t new_uid,
+               gid_t old_gid, gid_t new_gid)
+{
+	int dst_fd, src_fd, err = 0;
+	bool set_orig = false;
+	const struct dirent *ent;
+	DIR *dir;
+
+	if (copy_root) {
+		struct stat sb;
+
+		if (   fstatat (dst->dirfd, dst->name, &sb, 0) == 0
+		    || errno != ENOENT) {
+			return -1;
+		}
+
+		if (fstatat (src->dirfd, src->name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
+			return -1;
+		}
+
+		if (!S_ISDIR (sb.st_mode)) {
+			fprintf (log_get_logfd(),
+			         "%s: %s is not a directory",
+			         log_get_progname(), src->full_path);
+			return -1;
+		}
+
+		return copy_entry (src, dst, reset_selinux,
+		                   old_uid, new_uid, old_gid, new_gid);
+	}
+
+	/*
+	 * Make certain both directories exist.  This routine is called
+	 * after the home directory is created, or recursively after the
+	 * target is created.  It assumes the target directory exists.
+	 */
+
+	src_fd = openat (src->dirfd, src->name, O_DIRECTORY | O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
+	if (src_fd < 0) {
+		return -1;
+	}
+
+	dst_fd = openat (dst->dirfd, dst->name, O_DIRECTORY | O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
+	if (dst_fd < 0) {
+		(void) close (src_fd);
+		return -1;
+	}
+
+	/*
+	 * Open the source directory and read each entry.  Every file
+	 * entry in the directory is copied with the UID and GID set
+	 * to the provided values.  As an added security feature only
+	 * regular files (and directories ...) are copied, and no file
+	 * is made set-ID.
+	 */
+	dir = fdopendir (src_fd);
+	if (NULL == dir) {
+		(void) close (src_fd);
+		(void) close (dst_fd);
+		return -1;
+	}
+
+	if (src_orig == NULL) {
+		src_orig = src->full_path;
+		dst_orig = dst->full_path;
+		set_orig = true;
+	}
+	while ((0 == err) && (ent = readdir (dir)) != NULL) {
+		char              *src_name = NULL;
+		char              *dst_name;
+		struct path_info  src_entry, dst_entry;
+		/*
+		 * Skip the "." and ".." entries
+		 */
+		if (strcmp(ent->d_name, ".") == 0 ||
+		    strcmp(ent->d_name, "..") == 0)
+		{
+			continue;
+		}
+
+		if (asprintf(&src_name, "%s/%s", src->full_path, ent->d_name) == -1)
+		{
+			err = -1;
+			continue;
+		}
+		if (asprintf(&dst_name, "%s/%s", dst->full_path, ent->d_name) == -1)
+		{
+			err = -1;
+			goto skip;
+		}
+
+		src_entry.full_path = src_name;
+		src_entry.dirfd = dirfd(dir);
+		src_entry.name = ent->d_name;
+
+		dst_entry.full_path = dst_name;
+		dst_entry.dirfd = dst_fd;
+		dst_entry.name = ent->d_name;
+
+		err = copy_entry(&src_entry, &dst_entry, reset_selinux,
+				 old_uid, new_uid, old_gid, new_gid);
+
+		free(dst_name);
+skip:
+		free(src_name);
+	}
+	(void) closedir (dir);
+	(void) close (dst_fd);
+
+	if (set_orig) {
+		src_orig = NULL;
+		dst_orig = NULL;
+		/* FIXME: clean links
+		 * Since there can be hardlinks elsewhere on the device,
+		 * we cannot check that all the hardlinks were found:
+		assert (NULL == links);
+		 */
+	}
+
+#ifdef WITH_SELINUX
+	/* Reset SELinux to create files with default contexts.
+	 * Note that the context is only reset on exit of copy_tree (it is
+	 * assumed that the program would quit without needing a restored
+	 * context if copy_tree failed previously), and that copy_tree can
+	 * be called recursively (hence the context is set on the
+	 * sub-functions of copy_entry).
+	 */
+	if (reset_selinux_file_context () != 0) {
+		err = -1;
+	}
+#endif				/* WITH_SELINUX */
+
+	return err;
+}
+
+/*
+ * copy_entry - copy the entry of a directory
+ *
+ *	Copy the entry src to dst.
+ *	Depending on the type of entry, this function will forward the
+ *	request to copy_dir(), copy_symlink(), copy_hardlink(),
+ *	copy_special(), or copy_file().
+ *
+ *	The access and modification time will not be modified.
+ *
+ *	The permissions will be set to new_uid/new_gid.
+ *
+ *	If new_uid (resp. new_gid) is equal to -1, the user (resp. group) will
+ *	not be modified.
+ *
+ *	Only the files owned (resp. group-owned) by old_uid (resp.
+ *	old_gid) will be modified, unless old_uid (resp. old_gid) is set
+ *	to -1.
+ */
+static int copy_entry (const struct path_info *src, const struct path_info *dst,
+                       bool reset_selinux,
+                       uid_t old_uid, uid_t new_uid,
+                       gid_t old_gid, gid_t new_gid)
+{
+	int err = 0;
+	struct stat sb;
+	struct stat tmp_sb;
+	struct link_name *lp;
+	struct timespec mt[2];
+
+	if (fstatat(src->dirfd, src->name, &sb, AT_SYMLINK_NOFOLLOW) == -1) {
+		/* If we cannot stat the file, do not care. */
+		return 0;
+	}
+
+	mt[0].tv_sec  = sb.st_atim.tv_sec;
+	mt[0].tv_nsec = sb.st_atim.tv_nsec;
+
+	mt[1].tv_sec  = sb.st_mtim.tv_sec;
+	mt[1].tv_nsec = sb.st_mtim.tv_nsec;
+
+	if (S_ISDIR (sb.st_mode)) {
+		err = copy_dir (src, dst, reset_selinux, &sb, mt,
+				old_uid, new_uid, old_gid, new_gid);
+	}
+
+	/*
+	* If the destination already exists do nothing.
+	* This is after the copy_dir above to still iterate into subdirectories.
+	*/
+	if (fstatat(dst->dirfd, dst->name, &tmp_sb, AT_SYMLINK_NOFOLLOW) != -1) {
+		return err;
+	}
+
+	/*
+	* Copy any symbolic links
+	*/
+
+	else if (S_ISLNK (sb.st_mode)) {
+		err = copy_symlink (src, dst, reset_selinux, &sb, mt,
+				    old_uid, new_uid, old_gid, new_gid);
+	}
+
+	/*
+	* See if this is a previously copied link
+	*/
+
+	else if ((lp = check_link (src->full_path, &sb)) != NULL) {
+		err = copy_hardlink (dst, reset_selinux, lp);
+	}
+
+	/*
+	* Deal with FIFOs and special files.  The user really
+	* shouldn't have any of these, but it seems like it
+	* would be nice to copy everything ...
+	*/
+
+	else if (!S_ISREG (sb.st_mode)) {
+		err = copy_special (src, dst, reset_selinux, &sb, mt,
+				    old_uid, new_uid, old_gid, new_gid);
+	}
+
+	/*
+	* Create the new file and copy the contents.  The new
+	* file will be owned by the provided UID and GID values.
+	*/
+
+	else {
+		err = copy_file (src, dst, reset_selinux, &sb, mt,
+				 old_uid, new_uid, old_gid, new_gid);
+	}
+
+	return err;
+}
+
+/*
+ * copy_dir - copy a directory
+ *
+ *	Copy a directory (recursively) from src to dst.
+ *
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
+ *	the access and modification and the access rights.
+ *
+ *	Return 0 on success, -1 on error.
+ */
+static int copy_dir (const struct path_info *src, const struct path_info *dst,
+                     bool reset_selinux,
+                     const struct stat *statp, const struct timespec mt[],
+                     uid_t old_uid, uid_t new_uid,
+                     gid_t old_gid, gid_t new_gid)
+{
+	int err = 0;
+	struct stat dst_sb;
+
+	/*
+	 * Create a new target directory, make it owned by
+	 * the user and then recursively copy that directory.
+	 */
+
+#ifdef WITH_SELINUX
+	if (set_selinux_file_context (dst->full_path, S_IFDIR) != 0) {
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
+        /*
+         * If the destination is already a directory, don't change it
+         * but copy into it (recursively).
+        */
+        if (fstatat(dst->dirfd, dst->name, &dst_sb, AT_SYMLINK_NOFOLLOW) == 0 && S_ISDIR(dst_sb.st_mode)) {
+            return (copy_tree_impl (src, dst, false, reset_selinux,
+                           old_uid, new_uid, old_gid, new_gid) != 0);
+        }
+
+	if (   (mkdirat (dst->dirfd, dst->name, 0700) != 0)
+	    || (chownat_if_needed (dst, statp,
+	                         old_uid, new_uid, old_gid, new_gid) != 0)
+	    || (fchmodat (dst->dirfd, dst->name, statp->st_mode & 07777, AT_SYMLINK_NOFOLLOW) != 0)
+#ifdef WITH_ACL
+	    || (   (perm_copy_path (src, dst, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ACL */
+#ifdef WITH_ATTR
+	/*
+	 * If the third parameter is NULL, all extended attributes
+	 * except those that define Access Control Lists are copied.
+	 * ACLs are excluded by default because copying them between
+	 * file systems with and without ACL support needs some
+	 * additional logic so that no unexpected permissions result.
+	 */
+	    || (   !reset_selinux
+	        && (attr_copy_path (src, dst, NULL, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ATTR */
+	    || (copy_tree_impl (src, dst, false, reset_selinux,
+	                   old_uid, new_uid, old_gid, new_gid) != 0)
+	    || (utimensat (dst->dirfd, dst->name, mt, AT_SYMLINK_NOFOLLOW) != 0)) {
+		err = -1;
+	}
+
+	return err;
+}
+
+/*
+ * readlink_malloc - wrapper for readlink
+ *
+ * return NULL on error.
+ * The return string shall be freed by the caller.
+ */
+static /*@null@*/char *readlink_malloc (const char *filename)
+{
+	size_t size = 1024;
+
+	while (true) {
+		ssize_t nchars;
+		char *buffer = MALLOC(size, char);
+		if (NULL == buffer) {
+			return NULL;
+		}
+
+		nchars = readlink (filename, buffer, size);
+
+		if (nchars < 0) {
+			free(buffer);
+			return NULL;
+		}
+
+		if ((size_t) nchars < size) { /* The buffer was large enough */
+			/* readlink does not nul-terminate */
+			buffer[nchars] = '\0';
+			return buffer;
+		}
+
+		/* Try again with a bigger buffer */
+		free (buffer);
+		size *= 2;
+	}
+}
+
+/*
+ * copy_symlink - copy a symlink
+ *
+ *	Copy a symlink from src to dst.
+ *
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
+ *	the access and modification and the access rights.
+ *
+ *	Return 0 on success, -1 on error.
+ */
+static int copy_symlink (const struct path_info *src, const struct path_info *dst,
+                         MAYBE_UNUSED bool reset_selinux,
+                         const struct stat *statp, const struct timespec mt[],
+                         uid_t old_uid, uid_t new_uid,
+                         gid_t old_gid, gid_t new_gid)
+{
+	char *oldlink;
+
+	/* copy_tree () must be the entry point */
+	assert (NULL != src_orig);
+	assert (NULL != dst_orig);
+
+	/*
+	 * Get the name of the file which the link points
+	 * to.  If that name begins with the original
+	 * source directory name, that part of the link
+	 * name will be replaced with the original
+	 * destination directory name.
+	 */
+
+	oldlink = readlink_malloc (src->full_path);
+	if (NULL == oldlink) {
+		return -1;
+	}
+
+	/* If src was a link to an entry of the src_orig directory itself,
+	 * create a link to the corresponding entry in the dst_orig
+	 * directory.
+	 */
+	if (strncmp(oldlink, src_orig, strlen(src_orig)) == 0) {
+		char  *dummy;
+
+		xasprintf(&dummy, "%s%s", dst_orig, oldlink + strlen(src_orig));
+		free(oldlink);
+		oldlink = dummy;
+	}
+
+#ifdef WITH_SELINUX
+	if (set_selinux_file_context (dst->full_path, S_IFLNK) != 0) {
+		free (oldlink);
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
+	if (   (symlinkat (oldlink, dst->dirfd, dst->name) != 0)
+	    || (chownat_if_needed (dst, statp,
+	                          old_uid, new_uid, old_gid, new_gid) != 0)) {
+		/* FIXME: there are no modes on symlinks, right?
+		 *        ACL could be copied, but this would be much more
+		 *        complex than calling perm_copy_file.
+		 *        Ditto for Extended Attributes.
+		 *        We currently only document that ACL and Extended
+		 *        Attributes are not copied.
+		 */
+		free (oldlink);
+		return -1;
+	}
+	free (oldlink);
+
+	if (utimensat (dst->dirfd, dst->name, mt, AT_SYMLINK_NOFOLLOW) != 0) {
+		return -1;
+	}
+
+	return 0;
+}
+
+/*
+ * copy_hardlink - copy a hardlink
+ *
+ *	Copy a hardlink from src to dst.
+ *
+ *	Return 0 on success, -1 on error.
+ */
+static int copy_hardlink (const struct path_info *dst,
+                          MAYBE_UNUSED bool reset_selinux,
+                          struct link_name *lp)
+{
+	/* FIXME: selinux, ACL, Extended Attributes needed? */
+
+	if (linkat (AT_FDCWD, lp->ln_name, dst->dirfd, dst->name, 0) != 0) {
+		return -1;
+	}
+
+	/* If the file could be unlinked, decrement the links counter,
+	 * and forget about this link if it was the last reference */
+	lp->ln_count--;
+	if (lp->ln_count <= 0) {
+		remove_link (lp);
+	}
+
+	return 0;
+}
+
+
+/*
+ * copy_special - copy a special file
+ *
+ *	Copy a special file from src to dst.
+ *
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
+ *	the access and modification and the access rights.
+ *
+ *	Return 0 on success, -1 on error.
+ */
+static int
+copy_special(const struct path_info *src, const struct path_info *dst,
+             bool reset_selinux,
+             const struct stat *statp, const struct timespec mt[],
+             uid_t old_uid, uid_t new_uid,
+             gid_t old_gid, gid_t new_gid)
+{
+#if defined(WITH_SELINUX)
+	if (set_selinux_file_context(dst->full_path, statp->st_mode & S_IFMT) != 0)
+		return -1;
+#endif
+
+	if (mknodat(dst->dirfd, dst->name, statp->st_mode & ~07777U, statp->st_rdev) == -1)
+		return -1;
+
+	if (chownat_if_needed(dst, statp, old_uid, new_uid, old_gid, new_gid) == -1)
+		return -1;
+
+	if (fchmodat(dst->dirfd, dst->name, statp->st_mode & 07777, AT_SYMLINK_NOFOLLOW) == -1)
+		return -1;
+
+#if defined(WITH_ACL)
+	if (perm_copy_path(src, dst, &ctx) == -1 && errno != 0)
+		return -1;
+#endif
+
+#if defined(WITH_ATTR)
+	/*
+	 * If the third parameter is NULL, all extended attributes
+	 * except those that define Access Control Lists are copied.
+	 * ACLs are excluded by default because copying them between
+	 * file systems with and without ACL support needs some
+	 * additional logic so that no unexpected permissions result.
+	 */
+	if (!reset_selinux) {
+		if (attr_copy_path(src, dst, NULL, &ctx) == -1 && errno != 0)
+			return -1;
+	}
+#endif
+
+	if (utimensat(dst->dirfd, dst->name, mt, AT_SYMLINK_NOFOLLOW) == -1)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * copy_file - copy a file
+ *
+ *	Copy a file from src to dst.
+ *
+ *	statp, mt, old_uid, new_uid, old_gid, and new_gid are used to set
+ *	the access and modification and the access rights.
+ *
+ *	Return 0 on success, -1 on error.
+ */
+static int copy_file (const struct path_info *src, const struct path_info *dst,
+                      bool reset_selinux,
+                      const struct stat *statp, const struct timespec mt[],
+                      uid_t old_uid, uid_t new_uid,
+                      gid_t old_gid, gid_t new_gid)
+{
+	int err = 0;
+	int ifd;
+	int ofd;
+
+	ifd = openat (src->dirfd, src->name, O_RDONLY|O_NOFOLLOW|O_CLOEXEC);
+	if (ifd < 0) {
+		return -1;
+	}
+#ifdef WITH_SELINUX
+	if (set_selinux_file_context (dst->full_path, S_IFREG) != 0) {
+		(void) close (ifd);
+		return -1;
+	}
+#endif				/* WITH_SELINUX */
+	ofd = openat (dst->dirfd, dst->name, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC | O_NOFOLLOW | O_CLOEXEC, 0600);
+	if (   (ofd < 0)
+	    || (fchown_if_needed (ofd, statp,
+	                          old_uid, new_uid, old_gid, new_gid) != 0)
+	    || (fchmod (ofd, statp->st_mode & 07777) != 0)
+#ifdef WITH_ACL
+	    || (   (perm_copy_fd (src->full_path, ifd, dst->full_path, ofd, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ACL */
+#ifdef WITH_ATTR
+	/*
+	 * If the third parameter is NULL, all extended attributes
+	 * except those that define Access Control Lists are copied.
+	 * ACLs are excluded by default because copying them between
+	 * file systems with and without ACL support needs some
+	 * additional logic so that no unexpected permissions result.
+	 */
+	    || (   !reset_selinux
+	        && (attr_copy_fd (src->full_path, ifd, dst->full_path, ofd, NULL, &ctx) != 0)
+	        && (errno != 0))
+#endif				/* WITH_ATTR */
+	   ) {
+		if (ofd >= 0) {
+			(void) close (ofd);
+		}
+		(void) close (ifd);
+		return -1;
+	}
+
+	while (true) {
+		char buf[8192];
+		ssize_t cnt;
+
+		cnt = read (ifd, buf, sizeof buf);
+		if (cnt < 0) {
+			if (errno == EINTR) {
+				continue;
+			}
+			(void) close (ofd);
+			(void) close (ifd);
+			return -1;
+		}
+		if (cnt == 0) {
+			break;
+		}
+
+		if (write_full(ofd, buf, cnt) == -1) {
+			(void) close (ofd);
+			(void) close (ifd);
+			return -1;
+		}
+	}
+
+	(void) close (ifd);
+	if (close (ofd) != 0 && errno != EINTR) {
+		return -1;
+	}
+
+	if (utimensat (dst->dirfd, dst->name, mt, AT_SYMLINK_NOFOLLOW) != 0) {
+		return -1;
+	}
+
+	return err;
+}
+
+#define def_chown_if_needed(chown_function, type_dst)                  \
+static int chown_function ## _if_needed (type_dst dst,                 \
+                                         const struct stat *statp,     \
+                                         uid_t old_uid, uid_t new_uid, \
+                                         gid_t old_gid, gid_t new_gid) \
+{                                                                      \
+	uid_t tmpuid = (uid_t) -1;                                     \
+	gid_t tmpgid = (gid_t) -1;                                     \
+                                                                       \
+	/* Use new_uid if old_uid is set to -1 or if the file was      \
+	 * owned by the user. */                                       \
+	if (((uid_t) -1 == old_uid) || (statp->st_uid == old_uid)) {   \
+		tmpuid = new_uid;                                      \
+	}                                                              \
+	/* Otherwise, or if new_uid was set to -1, we keep the same    \
+	 * owner. */                                                   \
+	if ((uid_t) -1 == tmpuid) {                                    \
+		tmpuid = statp->st_uid;                                \
+	}                                                              \
+                                                                       \
+	if (((gid_t) -1 == old_gid) || (statp->st_gid == old_gid)) {   \
+		tmpgid = new_gid;                                      \
+	}                                                              \
+	if ((gid_t) -1 == tmpgid) {                                    \
+		tmpgid = statp->st_gid;                                \
+	}                                                              \
+                                                                       \
+	return chown_function (dst, tmpuid, tmpgid);                   \
+}
+
+def_chown_if_needed (fchown, int)
+
+static int chownat_if_needed (const struct path_info *dst,
+							  const struct stat *statp,
+                              uid_t old_uid, uid_t new_uid,
+                              gid_t old_gid, gid_t new_gid)
+{
+	uid_t tmpuid = (uid_t) -1;
+	gid_t tmpgid = (gid_t) -1;
+
+	/* Use new_uid if old_uid is set to -1 or if the file was
+	 * owned by the user. */
+	if (((uid_t) -1 == old_uid) || (statp->st_uid == old_uid)) {
+		tmpuid = new_uid;
+	}
+	/* Otherwise, or if new_uid was set to -1, we keep the same
+	 * owner. */
+	if ((uid_t) -1 == tmpuid) {
+		tmpuid = statp->st_uid;
+	}
+
+	if (((gid_t) -1 == old_gid) || (statp->st_gid == old_gid)) {
+		tmpgid = new_gid;
+	}
+	if ((gid_t) -1 == tmpgid) {
+		tmpgid = statp->st_gid;
+	}
+
+	return fchownat (dst->dirfd, dst->name, tmpuid, tmpgid, AT_SYMLINK_NOFOLLOW);
+}
+
+/*
+ * copy_tree - copy files in a directory tree
+ *
+ *	copy_tree() walks a directory tree and copies ordinary files
+ *	as it goes.
+ *
+ *	When reset_selinux is enabled, extended attributes (and thus
+ *	SELinux attributes) are not copied.
+ *
+ *	old_uid and new_uid are used to set the ownership of the copied
+ *	files. Unless old_uid is set to -1, only the files owned by
+ *	old_uid have their ownership changed to new_uid. In addition, if
+ *	new_uid is set to -1, no ownership will be changed.
+ *
+ *	The same logic applies for the group-ownership and
+ *	old_gid/new_gid.
+ */
+int copy_tree (const char *src_root, const char *dst_root,
+               bool copy_root, bool reset_selinux,
+               uid_t old_uid, uid_t new_uid,
+               gid_t old_gid, gid_t new_gid)
+{
+	const struct path_info src = {
+		.full_path = src_root,
+		.dirfd = AT_FDCWD,
+		.name = src_root
+	};
+	const struct path_info dst = {
+		.full_path = dst_root,
+		.dirfd = AT_FDCWD,
+		.name = dst_root
+	};
+
+	return copy_tree_impl(&src, &dst, copy_root, reset_selinux,
+						  old_uid, new_uid, old_gid, new_gid);
+}
diff --git a/lib/csrand.c b/lib/csrand.c
new file mode 100644
index 0000000..8ded343
--- /dev/null
+++ b/lib/csrand.c
@@ -0,0 +1,150 @@
+/*
+ * SPDX-FileCopyrightText:  Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <limits.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#if HAVE_SYS_RANDOM_H
+#include <sys/random.h>
+#endif
+#include "bit.h"
+#include "defines.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+#include "sizeof.h"
+
+
+static uint32_t csrand32(void);
+static uint32_t csrand_uniform32(uint32_t n);
+static unsigned long csrand_uniform_slow(unsigned long n);
+
+
+/*
+ * Return a uniformly-distributed CS random u_long value.
+ */
+unsigned long
+csrand(void)
+{
+	FILE           *fp;
+	unsigned long  r;
+
+#ifdef HAVE_GETENTROPY
+	/* getentropy may exist but lack kernel support.  */
+	if (getentropy(&r, sizeof(r)) == 0)
+		return r;
+#endif
+
+#ifdef HAVE_GETRANDOM
+	/* Likewise getrandom.  */
+	if (getrandom(&r, sizeof(r), 0) == sizeof(r))
+		return r;
+#endif
+
+#ifdef HAVE_ARC4RANDOM_BUF
+	/* arc4random_buf can never fail.  */
+	arc4random_buf(&r, sizeof(r));
+	return r;
+#endif
+
+	/* Use /dev/urandom as a last resort.  */
+	fp = fopen("/dev/urandom", "r");
+	if (NULL == fp) {
+		goto fail;
+	}
+
+	if (fread(&r, sizeof(r), 1, fp) != 1) {
+		fclose(fp);
+		goto fail;
+	}
+
+	fclose(fp);
+	return r;
+
+fail:
+	fprintf(log_get_logfd(), _("Unable to obtain random bytes.\n"));
+	exit(1);
+}
+
+
+/*
+ * Return a uniformly-distributed CS random value in the interval [0, n-1].
+ */
+unsigned long
+csrand_uniform(unsigned long n)
+{
+	if (n == 0 || n > UINT32_MAX)
+		return csrand_uniform_slow(n);
+
+	return csrand_uniform32(n);
+}
+
+
+/*
+ * Return a uniformly-distributed CS random value in the interval [min, max].
+ */
+unsigned long
+csrand_interval(unsigned long min, unsigned long max)
+{
+	return csrand_uniform(max - min + 1) + min;
+}
+
+
+static uint32_t
+csrand32(void)
+{
+	return csrand();
+}
+
+
+/*
+ * Fast Random Integer Generation in an Interval
+ * ACM Transactions on Modeling and Computer Simulation 29 (1), 2019
+ * <https://arxiv.org/abs/1805.10941>
+ */
+static uint32_t
+csrand_uniform32(uint32_t n)
+{
+	uint32_t  bound, rem;
+	uint64_t  r, mult;
+
+	if (n == 0)
+		return csrand32();
+
+	bound = -n % n;  // analogous to `2^32 % n`, since `x % y == (x-y) % y`
+
+	do {
+		r = csrand32();
+		mult = r * n;
+		rem = mult;  // analogous to `mult % 2^32`
+	} while (rem < bound);  // p = (2^32 % n) / 2^32;  W.C.: n=2^31+1, p=0.5
+
+	r = mult >> WIDTHOF(n);  // analogous to `mult / 2^32`
+
+	return r;
+}
+
+
+static unsigned long
+csrand_uniform_slow(unsigned long n)
+{
+	unsigned long  r, max, mask;
+
+	max = n - 1;
+	mask = bit_ceil_wrapul(n) - 1;
+
+	do {
+		r = csrand();
+		r &= mask;  // optimization
+	} while (r > max);  // p = ((mask+1) % n) / (mask+1);  W.C.: p=0.5
+
+	return r;
+}
diff --git a/lib/defines.h b/lib/defines.h
index d01f691..8c55ddd 100644
--- a/lib/defines.h
+++ b/lib/defines.h
@@ -6,41 +6,8 @@
 
 #include "config.h"
 
-#if HAVE_STDBOOL_H
-# include <stdbool.h>
-#else
-# if ! HAVE__BOOL
-#  ifdef __cplusplus
-typedef bool _Bool;
-#  else
-typedef unsigned char _Bool;
-#  endif
-# endif
-# define bool _Bool
-# define false (0)
-# define true  (1)
-# define __bool_true_false_are_defined 1
-#endif
-
-/* Take care of NLS matters.  */
-#ifdef S_SPLINT_S
-extern char *setlocale(int categories, const char *locale);
-# define LC_ALL		(6)
-extern char * bindtextdomain (const char * domainname, const char * dirname);
-extern char * textdomain (const char * domainname);
-# define _(Text) Text
-# define ngettext(Msgid1, Msgid2, N) \
-    ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
-#else
-#ifdef HAVE_LOCALE_H
-# include <locale.h>
-#else
-# undef setlocale
-# define setlocale(category, locale)	(NULL)
-# ifndef LC_ALL
-#  define LC_ALL	6
-# endif
-#endif
+#include <stdbool.h>
+#include <locale.h>
 
 #define gettext_noop(String) (String)
 /* #define gettext_def(String) "#define String" */
@@ -57,22 +24,18 @@ extern char * textdomain (const char * domainname);
 # define ngettext(Msgid1, Msgid2, N) \
     ((N) == 1 ? (const char *) (Msgid1) : (const char *) (Msgid2))
 #endif
-#endif
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#if HAVE_ERRNO_H
-# include <errno.h>
-#endif
+#include <errno.h>
 
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
 
 /*
  * crypt(3), crypt_gensalt(3), and their
@@ -85,22 +48,6 @@ extern char * textdomain (const char * domainname);
 #include <sys/time.h>
 #include <time.h>
 
-#ifdef HAVE_MEMSET_S
-# define memzero(ptr, size) memset_s((ptr), 0, (size))
-#elif defined HAVE_EXPLICIT_BZERO	/* !HAVE_MEMSET_S */
-# define memzero(ptr, size) explicit_bzero((ptr), (size))
-#else					/* !HAVE_MEMSET_S && HAVE_EXPLICIT_BZERO */
-static inline void memzero(void *ptr, size_t size)
-{
-	volatile unsigned char * volatile p = ptr;
-	while (size--) {
-		*p++ = '\0';
-	}
-}
-#endif					/* !HAVE_MEMSET_S && !HAVE_EXPLICIT_BZERO */
-
-#define strzero(s) memzero(s, strlen(s))	/* warning: evaluates twice */
-
 #include <dirent.h>
 
 /*
@@ -123,7 +70,6 @@ static inline void memzero(void *ptr, size_t size)
 #endif
 #endif
 
-#ifdef USE_SYSLOG
 #include <syslog.h>
 
 #ifndef LOG_WARN
@@ -170,14 +116,6 @@ static inline void memzero(void *ptr, size_t size)
 #define SYSLOG(x) syslog x
 #endif				/* !ENABLE_NLS */
 
-#else				/* !USE_SYSLOG */
-
-#define SYSLOG(x)		/* empty */
-#define openlog(a,b,c)		/* empty */
-#define closelog()		/* empty */
-
-#endif				/* !USE_SYSLOG */
-
 /* The default syslog settings can now be changed here,
    in just one place.  */
 
@@ -192,63 +130,25 @@ static inline void memzero(void *ptr, size_t size)
 
 #define OPENLOG(progname) openlog(progname, SYSLOG_OPTIONS, SYSLOG_FACILITY)
 
-#ifndef F_OK
-# define F_OK 0
-# define X_OK 1
-# define W_OK 2
-# define R_OK 4
-#endif
-
-#ifndef SEEK_SET
-# define SEEK_SET 0
-# define SEEK_CUR 1
-# define SEEK_END 2
-#endif
-
-#if HAVE_TERMIOS_H
-# include <termios.h>
-# define STTY(fd, termio) tcsetattr(fd, TCSANOW, termio)
-# define GTTY(fd, termio) tcgetattr(fd, termio)
-# define TERMIO struct termios
-# define USE_TERMIOS
-#else				/* assumed HAVE_TERMIO_H */
-# include <sys/ioctl.h>
-# include <termio.h>
-# define STTY(fd, termio) ioctl(fd, TCSETA, termio)
-# define GTTY(fd, termio) ioctl(fd, TCGETA, termio)
-# define TEMRIO struct termio
-# define USE_TERMIO
-#endif
+#include <termios.h>
+#define STTY(fd, termio) tcsetattr(fd, TCSANOW, termio)
+#define GTTY(fd, termio) tcgetattr(fd, termio)
+#define TERMIO struct termios
 
 /*
  * Password aging constants
  *
  * DAY - seconds / day
  * WEEK - seconds / week
- * SCALE - seconds / aging unit
  */
 
 /* Solaris defines this in shadow.h */
 #ifndef DAY
-#define DAY (24L*3600L)
+#define DAY  ((time_t) 24 * 3600)
 #endif
 
 #define WEEK (7*DAY)
 
-#ifdef ITI_AGING
-#define SCALE 1
-#else
-#define SCALE DAY
-#endif
-
-/* Copy string pointed by B to array A with size checking.  It was originally
-   in lmain.c but is _very_ useful elsewhere.  Some setuid root programs with
-   very sloppy coding used to assume that BUFSIZ will always be enough...  */
-
-					/* danger - side effects */
-#define STRFCPY(A,B) \
-	(strncpy((A), (B), sizeof(A) - 1), (A)[sizeof(A) - 1] = '\0')
-
 #ifndef PASSWD_FILE
 #define PASSWD_FILE "/etc/passwd"
 #endif
@@ -261,22 +161,18 @@ static inline void memzero(void *ptr, size_t size)
 #define SHADOW_FILE "/etc/shadow"
 #endif
 
-#ifdef SHADOWGRP
-#ifndef SGROUP_FILE
-#define SGROUP_FILE "/etc/gshadow"
-#endif
+#ifndef SUBUID_FILE
+#define SUBUID_FILE "/etc/subuid"
 #endif
 
-#ifndef NULL
-#define NULL ((void *) 0)
+#ifndef SUBGID_FILE
+#define SUBGID_FILE "/etc/subgid"
 #endif
 
-#ifdef sun			/* hacks for compiling on SunOS */
-# ifndef SOLARIS
-extern int fputs ();
-extern char *strdup ();
-extern char *strerror ();
-# endif
+#ifdef SHADOWGRP
+#ifndef SGROUP_FILE
+#define SGROUP_FILE "/etc/gshadow"
+#endif
 #endif
 
 /*
@@ -288,45 +184,16 @@ extern char *strerror ();
 #define SHADOW_PASSWD_STRING "x"
 #endif
 
-#define SHADOW_SP_FLAG_UNSET ((unsigned long int)-1)
+#define SHADOW_SP_FLAG_UNSET ((unsigned long)-1)
 
 #ifdef WITH_AUDIT
-#ifdef __u8			/* in case we use pam < 0.80 */
+/* in case we use pam < 0.80 */
 #undef __u8
-#endif
-#ifdef __u32
 #undef __u32
-#endif
 
 #include <libaudit.h>
 #endif
 
-/* To be used for verified unused parameters */
-#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
-# define unused __attribute__((unused))
-# define format_attr(type, index, check) __attribute__((format (type, index, check)))
-#else
-# define unused
-# define format_attr(type, index, check)
-#endif
-
-/* Maximum length of usernames */
-#ifdef HAVE_UTMPX_H
-# include <utmpx.h>
-# define USER_NAME_MAX_LENGTH (sizeof (((struct utmpx *)NULL)->ut_user))
-#else
-# include <utmp.h>
-# ifdef HAVE_STRUCT_UTMP_UT_USER
-#  define USER_NAME_MAX_LENGTH (sizeof (((struct utmp *)NULL)->ut_user))
-# else
-#  ifdef HAVE_STRUCT_UTMP_UT_NAME
-#   define USER_NAME_MAX_LENGTH (sizeof (((struct utmp *)NULL)->ut_name))
-#  else
-#   define USER_NAME_MAX_LENGTH 32
-#  endif
-# endif
-#endif
-
 /* Maximum length of passwd entry */
 #define PASSWD_ENTRY_MAX_LENGTH 32768
 
@@ -336,4 +203,14 @@ extern char *strerror ();
 #  define shadow_getenv(name) getenv(name)
 #endif
 
+/*
+ * Maximum password length
+ *
+ * Consider that there is also limit in PAM (PAM_MAX_RESP_SIZE)
+ * currently set to 512.
+ */
+#if !defined(PASS_MAX)
+#define PASS_MAX  BUFSIZ - 1
+#endif
+
 #endif				/* _DEFINES_H_ */
diff --git a/lib/env.c b/lib/env.c
new file mode 100644
index 0000000..9b5fd32
--- /dev/null
+++ b/lib/env.c
@@ -0,0 +1,236 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1992, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "alloc.h"
+#include "prototypes.h"
+#include "defines.h"
+#include "shadowlog.h"
+#include "string/sprintf.h"
+
+
+/*
+ * NEWENVP_STEP must be a power of two.  This is the number
+ * of (char *) pointers to allocate at a time, to avoid using
+ * realloc() too often.
+ */
+#define NEWENVP_STEP 16
+size_t newenvc = 0;
+/*@null@*/char **newenvp = NULL;
+
+static const char *const forbid[] = {
+	"_RLD_=",
+	"BASH_ENV=",		/* GNU creeping featurism strikes again... */
+	"ENV=",
+	"HOME=",
+	"IFS=",
+	"KRB_CONF=",
+	"LD_",			/* anything with the LD_ prefix */
+	"LIBPATH=",
+	"MAIL=",
+	"NLSPATH=",
+	"PATH=",
+	"SHELL=",
+	"SHLIB_PATH=",
+	NULL
+};
+
+/* these are allowed, but with no slashes inside
+   (to work around security problems in GNU gettext) */
+static const char *const noslash[] = {
+	"LANG=",
+	"LANGUAGE=",
+	"LC_",			/* anything with the LC_ prefix */
+	NULL
+};
+
+/*
+ * initenv() must be called once before using addenv().
+ */
+void initenv (void)
+{
+	newenvp = XMALLOC(NEWENVP_STEP, char *);
+	*newenvp = NULL;
+}
+
+
+void addenv (const char *string, /*@null@*/const char *value)
+{
+	char    *cp, *newstring;
+	size_t  i, n;
+
+	if (NULL != value) {
+		xasprintf(&newstring, "%s=%s", string, value);
+	} else {
+		newstring = xstrdup (string);
+	}
+
+	/*
+	 * Search for a '=' character within the string and if none is found
+	 * just ignore the whole string.
+	 */
+
+	cp = strchr (newstring, '=');
+	if (NULL == cp) {
+		free(newstring);
+		return;
+	}
+
+	n = (size_t) (cp - newstring);
+
+	/*
+	 * If this environment variable is already set, change its value.
+	 */
+	for (i = 0; i < newenvc; i++) {
+		if (   (strncmp (newstring, newenvp[i], n) == 0)
+		    && (('=' == newenvp[i][n]) || ('\0' == newenvp[i][n]))) {
+			break;
+		}
+	}
+
+	if (i < newenvc) {
+		free(newenvp[i]);
+		newenvp[i] = newstring;
+		return;
+	}
+
+	/*
+	 * Otherwise, save the new environment variable
+	 */
+	newenvp[newenvc++] = newstring;
+
+	/*
+	 * And extend the environment if needed.
+	 */
+
+	/*
+	 * Check whether newenvc is a multiple of NEWENVP_STEP.
+	 * If so we have to resize the vector.
+	 * the expression (newenvc & (NEWENVP_STEP - 1)) == 0
+	 * is equal to    (newenvc %  NEWENVP_STEP) == 0
+	 * as long as NEWENVP_STEP is a power of 2.
+	 */
+
+	if ((newenvc & (NEWENVP_STEP - 1)) == 0) {
+		bool  update_environ;
+
+		update_environ = (environ == newenvp);
+
+		newenvp = XREALLOC(newenvp, newenvc + NEWENVP_STEP, char *);
+
+		/*
+		 * If this is our current environment, update
+		 * environ so that it doesn't point to some
+		 * free memory area (realloc() could move it).
+		 */
+		if (update_environ)
+			environ = newenvp;
+	}
+
+	/*
+	 * The last entry of newenvp must be NULL
+	 */
+
+	newenvp[newenvc] = NULL;
+}
+
+
+/*
+ * set_env - copy command line arguments into the environment
+ */
+void set_env (int argc, char *const *argv)
+{
+	int   noname = 1;
+	char  variable[1024];
+	char  *cp;
+
+	for (; argc > 0; argc--, argv++) {
+		if (strlen (*argv) >= sizeof variable) {
+			continue;	/* ignore long entries */
+		}
+
+		cp = strchr (*argv, '=');
+		if (NULL == cp) {
+			assert(SNPRINTF(variable, "L%d", noname) != -1);
+			noname++;
+			addenv (variable, *argv);
+		} else {
+			const char *const *p;
+
+			for (p = forbid; NULL != *p; p++) {
+				if (strncmp (*argv, *p, strlen (*p)) == 0) {
+					break;
+				}
+			}
+
+			if (NULL != *p) {
+				stpcpy(mempcpy(variable, *argv, (size_t)(cp - *argv)), "");
+				printf (_("You may not change $%s\n"),
+					variable);
+				continue;
+			}
+
+			addenv (*argv, NULL);
+		}
+	}
+}
+
+/*
+ * sanitize_env - remove some nasty environment variables
+ * If you fall into a total paranoia, you should call this
+ * function for any root-setuid program or anything the user
+ * might change the environment with. 99% useless as almost
+ * all modern Unixes will handle setuid executables properly,
+ * but... I feel better with that silly precaution. -j.
+ */
+
+void sanitize_env (void)
+{
+	char **envp = environ;
+	const char *const *bad;
+	char **cur;
+	char **move;
+
+	for (cur = envp; NULL != *cur; cur++) {
+		for (bad = forbid; NULL != *bad; bad++) {
+			if (strncmp (*cur, *bad, strlen (*bad)) == 0) {
+				for (move = cur; NULL != *move; move++) {
+					*move = *(move + 1);
+				}
+				cur--;
+				break;
+			}
+		}
+	}
+
+	for (cur = envp; NULL != *cur; cur++) {
+		for (bad = noslash; NULL != *bad; bad++) {
+			if (strncmp (*cur, *bad, strlen (*bad)) != 0) {
+				continue;
+			}
+			if (strchr (*cur, '/') == NULL) {
+				continue;	/* OK */
+			}
+			for (move = cur; NULL != *move; move++) {
+				*move = *(move + 1);
+			}
+			cur--;
+			break;
+		}
+	}
+}
+
diff --git a/lib/failure.c b/lib/failure.c
new file mode 100644
index 0000000..e42e710
--- /dev/null
+++ b/lib/failure.c
@@ -0,0 +1,267 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2002 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+#include "defines.h"
+#include "faillog.h"
+#include "failure.h"
+#include "memzero.h"
+#include "prototypes.h"
+#include "string/strftime.h"
+#include "string/strtcpy.h"
+
+
+#define	YEAR	(365L*DAY)
+/*
+ * failure - make failure entry
+ *
+ *	failure() creates a new (struct faillog) entry or updates an
+ *	existing one with the current failed login information.
+ */
+void failure (uid_t uid, const char *tty, struct faillog *fl)
+{
+	int fd;
+	off_t offset_uid = (off_t) (sizeof *fl) * uid;
+
+	/*
+	 * Don't do anything if failure logging isn't set up.
+	 */
+
+	if (access (FAILLOG_FILE, F_OK) != 0) {
+		return;
+	}
+
+	fd = open (FAILLOG_FILE, O_RDWR);
+	if (fd < 0) {
+		SYSLOG ((LOG_WARN,
+		         "Can't write faillog entry for UID %lu in %s: %m",
+		         (unsigned long) uid, FAILLOG_FILE));
+		return;
+	}
+
+	/*
+	 * The file is indexed by UID value meaning that shared UID's
+	 * share failure log records.  That's OK since they really
+	 * share just about everything else ...
+	 */
+
+	if (   (lseek (fd, offset_uid, SEEK_SET) != offset_uid)
+	    || (read (fd, fl, sizeof *fl) != (ssize_t) sizeof *fl)) {
+		/* This is not necessarily a failure. The file is
+		 * initially zero length.
+		 *
+		 * If lseek() or read() failed for any other reason, this
+		 * might reset the counter. But the new failure will be
+		 * logged.
+		 */
+		memzero (fl, sizeof *fl);
+	}
+
+	/*
+	 * Update the record.  We increment the failure count to log the
+	 * latest failure.  The only concern here is overflow, and we'll
+	 * check for that.  The line name and time of day are both
+	 * updated as well.
+	 */
+
+	if (fl->fail_cnt + 1 > 0) {
+		fl->fail_cnt++;
+	}
+
+	STRTCPY(fl->fail_line, tty);
+	(void) time (&fl->fail_time);
+
+	/*
+	 * Seek back to the correct position in the file and write the
+	 * record out.  Ideally we should lock the file in case the same
+	 * account is being logged simultaneously.  But the risk doesn't
+	 * seem that great.
+	 */
+
+	if (   (lseek (fd, offset_uid, SEEK_SET) != offset_uid)
+	    || (write_full(fd, fl, sizeof *fl) == -1)) {
+		goto err_write;
+	}
+
+	if (close (fd) != 0 && errno != EINTR) {
+		goto err_close;
+	}
+
+	return;
+
+err_write:
+	{
+		int saved_errno = errno;
+		(void) close (fd);
+		errno = saved_errno;
+	}
+err_close:
+	SYSLOG ((LOG_WARN,
+	         "Can't write faillog entry for UID %lu to %s: %m",
+	         (unsigned long) uid, FAILLOG_FILE));
+}
+
+static bool too_many_failures (const struct faillog *fl)
+{
+	time_t now;
+
+	if ((0 == fl->fail_max) || (fl->fail_cnt < fl->fail_max)) {
+		return false;
+	}
+
+	if (0 == fl->fail_locktime) {
+		return true;	/* locked until reset manually */
+	}
+
+	(void) time (&now);
+	if ((fl->fail_time + fl->fail_locktime) < now) {
+		return false;	/* enough time since last failure */
+	}
+
+	return true;
+}
+
+/*
+ * failcheck - check for failures > allowable
+ *
+ *	failcheck() is called AFTER the password has been validated.  If the
+ *	account has been "attacked" with too many login failures, failcheck()
+ *	returns 0 to indicate that the login should be denied even though
+ *	the password is valid.
+ *
+ *	failed indicates if the login failed AFTER the password has been
+ *	       validated.
+ */
+
+int failcheck (uid_t uid, struct faillog *fl, bool failed)
+{
+	int fd;
+	struct faillog fail;
+	off_t offset_uid = (off_t) (sizeof *fl) * uid;
+
+	/*
+	 * Suppress the check if the log file isn't there.
+	 */
+
+	if (access (FAILLOG_FILE, F_OK) != 0) {
+		return 1;
+	}
+
+	fd = open (FAILLOG_FILE, failed?O_RDONLY:O_RDWR);
+	if (fd < 0) {
+		SYSLOG ((LOG_WARN,
+		         "Can't open the faillog file (%s) to check UID %lu: %m; "
+		         "User access authorized.",
+		         FAILLOG_FILE, (unsigned long) uid));
+		return 1;
+	}
+
+	/*
+	 * Get the record from the file and determine if the user has
+	 * exceeded the failure limit.  If "max" is zero, any number
+	 * of failures are permitted.  Only when "max" is non-zero and
+	 * "cnt" is greater than or equal to "max" is the account
+	 * considered to be locked.
+	 *
+	 * If read fails, there is no record for this user yet (the
+	 * file is initially zero length and extended by writes), so
+	 * no need to reset the count.
+	 */
+
+	if (   (lseek (fd, offset_uid, SEEK_SET) != offset_uid)
+	    || (read (fd, fl, sizeof *fl) != (ssize_t) sizeof *fl)) {
+		(void) close (fd);
+		return 1;
+	}
+
+	if (too_many_failures (fl)) {
+		(void) close (fd);
+		return 0;
+	}
+
+	/*
+	 * The record is updated if this is not a failure.  The count will
+	 * be reset to zero, but the rest of the information will be left
+	 * in the record in case someone wants to see where the failed
+	 * login originated.
+	 */
+
+	if (!failed) {
+		fail = *fl;
+		fail.fail_cnt = 0;
+
+		if (   (lseek (fd, offset_uid, SEEK_SET) != offset_uid)
+		    || (write_full(fd, &fail, sizeof fail) == -1)) {
+			    goto err_write;
+		}
+
+		if (close (fd) != 0 && errno != EINTR) {
+			goto err_close;
+		}
+	} else {
+		(void) close (fd);
+	}
+
+	return 1;
+
+err_write:
+	{
+		int saved_errno = errno;
+		(void) close (fd);
+		errno = saved_errno;
+	}
+err_close:
+	SYSLOG ((LOG_WARN,
+	         "Can't reset faillog entry for UID %lu in %s: %m",
+	         (unsigned long) uid, FAILLOG_FILE));
+	return 1;
+}
+
+/*
+ * failprint - print line of failure information
+ *
+ *	failprint takes a (struct faillog) entry and formats it into a
+ *	message which is displayed at login time.
+ */
+
+void failprint (const struct faillog *fail)
+{
+	struct tm *tp;
+	char lasttimeb[256];
+	char *lasttime = lasttimeb;
+	time_t NOW;
+
+	if (0 == fail->fail_cnt) {
+		return;
+	}
+
+	tp = localtime (&(fail->fail_time));
+	(void) time (&NOW);
+
+	/*
+	 * Print all information we have.
+	 */
+	STRFTIME(lasttimeb, "%c", tp);
+
+	/*@-formatconst@*/
+	(void) printf (ngettext ("%d failure since last login.\n"
+	                         "Last was %s on %s.\n",
+	                         "%d failures since last login.\n"
+	                         "Last was %s on %s.\n",
+	                         (unsigned long) fail->fail_cnt),
+	               fail->fail_cnt, lasttime, fail->fail_line);
+	/*@=formatconst@*/
+}
diff --git a/lib/failure.h b/lib/failure.h
new file mode 100644
index 0000000..1352b68
--- /dev/null
+++ b/lib/failure.h
@@ -0,0 +1,44 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1997 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2005       , Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* $Id$ */
+#ifndef _FAILURE_H_
+#define _FAILURE_H_
+
+#include "defines.h"
+#include "faillog.h"
+
+/*
+ * failure - make failure entry
+ *
+ *	failure() creates a new (struct faillog) entry or updates an
+ *	existing one with the current failed login information.
+ */
+extern void failure (uid_t, const char *, struct faillog *);
+
+/*
+ * failcheck - check for failures > allowable
+ *
+ *	failcheck() is called AFTER the password has been validated.  If the
+ *	account has been "attacked" with too many login failures, failcheck()
+ *	returns FALSE to indicate that the login should be denied even though
+ *	the password is valid.
+ */
+extern int failcheck (uid_t uid, struct faillog *fl, bool failed);
+
+/*
+ * failprint - print line of failure information
+ *
+ *	failprint takes a (struct faillog) entry and formats it into a
+ *	message which is displayed at login time.
+ */
+extern void failprint (const struct faillog *);
+
+#endif
+
diff --git a/lib/fd.c b/lib/fd.c
new file mode 100644
index 0000000..bcfa374
--- /dev/null
+++ b/lib/fd.c
@@ -0,0 +1,41 @@
+// SPDX-FileCopyrightText: 2024, Skyler Ferrante <sjf5462@rit.edu>
+// SPDX-License-Identifier: BSD-3-Clause
+
+/**
+ * To protect against file descriptor omission attacks, we open the std file
+ * descriptors with /dev/null if they are not already open. Code is based on
+ * fix_fds from sudo.c.
+ */
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "prototypes.h"
+
+static void check_fd(int fd);
+
+void
+check_fds(void)
+{
+	/**
+	 * Make sure stdin, stdout, stderr are open
+	 * If they are closed, set them to /dev/null
+	 */
+	check_fd(STDIN_FILENO);
+	check_fd(STDOUT_FILENO);
+	check_fd(STDERR_FILENO);
+}
+
+static void
+check_fd(int fd)
+{
+	int  devnull;
+
+	if (fcntl(fd, F_GETFL, 0) != -1)
+		return;
+
+	devnull = open("/dev/null", O_RDWR);
+	if (devnull != fd)
+		abort();
+}
diff --git a/lib/fields.c b/lib/fields.c
index 8a56035..5392924 100644
--- a/lib/fields.c
+++ b/lib/fields.c
@@ -21,9 +21,9 @@
  *
  * The supplied field is scanned for non-printable and other illegal
  * characters.
- *  + -1 is returned if an illegal character is present.
- *  +  1 is returned if no illegal characters are present, but the field
- *       contains a non-printable character.
+ *  + -1 is returned if an illegal or control character is present.
+ *  +  1 is returned if no illegal or control characters are present,
+ *       but the field contains a non-printable character.
  *  +  0 is returned otherwise.
  */
 int valid_field (const char *field, const char *illegal)
@@ -37,23 +37,22 @@ int valid_field (const char *field, const char *illegal)
 
 	/* For each character of field, search if it appears in the list
 	 * of illegal characters. */
+	if (illegal && NULL != strpbrk (field, illegal)) {
+		return -1;
+	}
+
+	/* Search if there are non-printable or control characters */
 	for (cp = field; '\0' != *cp; cp++) {
-		if (strchr (illegal, *cp) != NULL) {
+		unsigned char c = *cp;
+		if (!isprint (c)) {
+			err = 1;
+		}
+		if (iscntrl (c)) {
 			err = -1;
 			break;
 		}
 	}
 
-	if (0 == err) {
-		/* Search if there are some non-printable characters */
-		for (cp = field; '\0' != *cp; cp++) {
-			if (!isprint (*cp)) {
-				err = 1;
-				break;
-			}
-		}
-	}
-
 	return err;
 }
 
@@ -74,7 +73,7 @@ void change_field (char *buf, size_t maxsize, const char *prompt)
 
 	printf ("\t%s [%s]: ", prompt, buf);
 	(void) fflush (stdout);
-	if (fgets (newf, (int) maxsize, stdin) != newf) {
+	if (fgets (newf, maxsize, stdin) != newf) {
 		return;
 	}
 
@@ -91,17 +90,16 @@ void change_field (char *buf, size_t maxsize, const char *prompt)
 		 * entering a space.  --marekm
 		 */
 
-		while (--cp >= newf && isspace (*cp));
-		cp++;
+		while (newf < cp && isspace (cp[-1])) {
+			cp--;
+		}
 		*cp = '\0';
 
 		cp = newf;
-		while (('\0' != *cp) && isspace (*cp)) {
+		while (isspace (*cp)) {
 			cp++;
 		}
 
-		strncpy (buf, cp, maxsize - 1);
-		buf[maxsize - 1] = '\0';
+		strcpy (buf, cp);
 	}
 }
-
diff --git a/lib/find_new_gid.c b/lib/find_new_gid.c
new file mode 100644
index 0000000..cfd5609
--- /dev/null
+++ b/lib/find_new_gid.c
@@ -0,0 +1,500 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 2008 - 2011, Nicolas François
+ * SPDX-FileCopyrightText: 2014, Red Hat, Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "alloc.h"
+#include "prototypes.h"
+#include "groupio.h"
+#include "getdef.h"
+#include "shadowlog.h"
+
+/*
+ * get_ranges - Get the minimum and maximum ID ranges for the search
+ *
+ * This function will return the minimum and maximum ranges for IDs
+ *
+ * 0: The function completed successfully
+ * EINVAL: The provided ranges are impossible (such as maximum < minimum)
+ *
+ * preferred_min: The special-case minimum value for a specifically-
+ * requested ID, which may be lower than the standard min_id
+ */
+static int get_ranges (bool sys_group, gid_t *min_id, gid_t *max_id,
+		       gid_t *preferred_min)
+{
+	gid_t gid_def_max = 0;
+
+	if (sys_group) {
+		/* System groups */
+
+		/* A requested ID is allowed to be below the autoselect range */
+		*preferred_min = (gid_t) 1;
+
+		/* Get the minimum ID range from login.defs or default to 101 */
+		*min_id = getdef_ulong ("SYS_GID_MIN", 101UL);
+
+		/*
+		 * If SYS_GID_MAX is unspecified, we should assume it to be one
+		 * less than the GID_MIN (which is reserved for non-system accounts)
+		 */
+		gid_def_max = getdef_ulong ("GID_MIN", 1000UL) - 1;
+		*max_id = getdef_ulong ("SYS_GID_MAX", gid_def_max);
+
+		/* Check that the ranges make sense */
+		if (*max_id < *min_id) {
+			(void) fprintf (log_get_logfd(),
+                            _("%s: Invalid configuration: SYS_GID_MIN (%lu), "
+                              "GID_MIN (%lu), SYS_GID_MAX (%lu)\n"),
+                            log_get_progname(), (unsigned long) *min_id,
+                            getdef_ulong ("GID_MIN", 1000UL),
+                            (unsigned long) *max_id);
+			return EINVAL;
+		}
+		/*
+		 * Zero is reserved for root and the allocation algorithm does not
+		 * work right with it.
+		 */
+		if (*min_id == 0) {
+			*min_id = (gid_t) 1;
+		}
+	} else {
+		/* Non-system groups */
+
+		/* Get the values from login.defs or use reasonable defaults */
+		*min_id = getdef_ulong ("GID_MIN", 1000UL);
+		*max_id = getdef_ulong ("GID_MAX", 60000UL);
+
+		/*
+		 * The preferred minimum should match the standard ID minimum
+		 * for non-system groups.
+		 */
+		*preferred_min = *min_id;
+
+		/* Check that the ranges make sense */
+		if (*max_id < *min_id) {
+			(void) fprintf (log_get_logfd(),
+					_("%s: Invalid configuration: GID_MIN (%lu), "
+					  "GID_MAX (%lu)\n"),
+					log_get_progname(), (unsigned long) *min_id,
+					(unsigned long) *max_id);
+			return EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * check_gid - See if the requested GID is available
+ *
+ * On success, return 0
+ * If the ID is in use, return EEXIST
+ * If the ID might clash with -1, return EINVAL
+ * If the ID is outside the range, return ERANGE
+ * In other cases, return errno from getgrgid()
+ */
+static int check_gid (const gid_t gid,
+		      const gid_t gid_min,
+		      const gid_t gid_max,
+		      const bool *used_gids)
+{
+	/* First test that the preferred ID is in the range */
+	if (gid < gid_min || gid > gid_max) {
+		return ERANGE;
+	}
+
+	/* Check for compatibility with 16b and 32b gid_t error codes */
+	if (gid == UINT16_MAX || gid == UINT32_MAX) {
+		return EINVAL;
+	}
+
+	/*
+	 * Check whether we already detected this GID
+	 * using the gr_next() loop
+	 */
+	if (used_gids != NULL && used_gids[gid]) {
+		return EEXIST;
+	}
+	/* Check if the GID exists according to NSS */
+	errno = 0;
+	if (prefix_getgrgid (gid) != NULL) {
+		return EEXIST;
+	} else {
+		/* getgrgid() was NULL
+		 * we have to ignore errors as temporary
+		 * failures of remote user identity services
+		 * would completely block user/group creation
+		 */
+	}
+
+	/* If we've made it here, the GID must be available */
+	return 0;
+}
+
+/*
+ * find_new_gid - Find a new unused GID.
+ *
+ * If successful, find_new_gid provides an unused group ID in the
+ * [GID_MIN:GID_MAX] range.
+ * This ID should be higher than all the used GID, but if not possible,
+ * the lowest unused ID in the range will be returned.
+ *
+ * Return 0 on success, -1 if no unused GIDs are available.
+ */
+int find_new_gid (bool sys_group,
+                 gid_t *gid,
+                 /*@null@*/gid_t const *preferred_gid)
+{
+	bool *used_gids;
+	const struct group *grp;
+	gid_t gid_min, gid_max, preferred_min;
+	gid_t id;
+	gid_t lowest_found, highest_found;
+	int result;
+	int nospam = 0;
+
+	assert(gid != NULL);
+
+	/*
+	 * First, figure out what ID range is appropriate for
+	 * automatic assignment
+	 */
+	result = get_ranges (sys_group, &gid_min, &gid_max, &preferred_min);
+	if (result == EINVAL) {
+		return -1;
+	}
+
+	/* Check if the preferred GID is available */
+	if (preferred_gid) {
+		result = check_gid (*preferred_gid, preferred_min, gid_max, NULL);
+		if (result == 0) {
+			/*
+			 * Make sure the GID isn't queued for use already
+			 */
+			if (gr_locate_gid (*preferred_gid) == NULL) {
+				*gid = *preferred_gid;
+				return 0;
+			}
+			/*
+			 * gr_locate_gid() found the GID in an as-yet uncommitted
+			 * entry. We'll proceed below and auto-set a GID.
+			 */
+		} else if (result == EEXIST || result == ERANGE || result == EINVAL) {
+			/*
+			 * Continue on below. At this time, we won't
+			 * treat these three cases differently.
+			 */
+		} else {
+			/*
+			 * An unexpected error occurred. We should report
+			 * this and fail the group creation.
+			 * This differs from the automatic creation
+			 * behavior below, since if a specific GID was
+			 * requested and generated an error, the user is
+			 * more likely to want to stop and address the
+			 * issue.
+			 */
+			fprintf (log_get_logfd(),
+				_("%s: Encountered error attempting to use "
+				  "preferred GID: %s\n"),
+				log_get_progname(), strerror (result));
+			return -1;
+		}
+	}
+
+	/*
+	 * Search the entire group file,
+	 * looking for the next unused value.
+	 *
+	 * We first check the local database with gr_rewind/gr_next to find
+	 * all local values that are in use.
+	 *
+	 * We then compare the next free value to all databases (local and
+	 * remote) and iterate until we find a free one. If there are free
+	 * values beyond the lowest (system groups) or highest (non-system
+	 * groups), we will prefer those and avoid potentially reclaiming a
+	 * deleted group (which can be a security issue, since it may grant
+	 * access to files belonging to that former group).
+	 *
+	 * If there are no GIDs available at the end of the search, we will
+	 * have no choice but to iterate through the range looking for gaps.
+	 *
+	 */
+
+	/* Create an array to hold all of the discovered GIDs */
+	used_gids = CALLOC (gid_max + 1, bool);
+	if (NULL == used_gids) {
+		fprintf (log_get_logfd(),
+			 _("%s: failed to allocate memory: %s\n"),
+			 log_get_progname(), strerror (errno));
+		return -1;
+	}
+
+	/* First look for the lowest and highest value in the local database */
+	(void) gr_rewind ();
+	highest_found = gid_min;
+	lowest_found = gid_max;
+	while ((grp = gr_next ()) != NULL) {
+		/*
+		 * Does this entry have a lower GID than the lowest we've found
+		 * so far?
+		 */
+		if ((grp->gr_gid <= lowest_found) && (grp->gr_gid >= gid_min)) {
+			lowest_found = grp->gr_gid - 1;
+		}
+
+		/*
+		 * Does this entry have a higher GID than the highest we've found
+		 * so far?
+		 */
+		if ((grp->gr_gid >= highest_found) && (grp->gr_gid <= gid_max)) {
+			highest_found = grp->gr_gid + 1;
+		}
+
+		/* create index of used GIDs */
+		if (grp->gr_gid >= gid_min
+			&& grp->gr_gid <= gid_max) {
+
+			used_gids[grp->gr_gid] = true;
+		}
+	}
+
+	if (sys_group) {
+		/*
+		 * For system groups, we want to start from the
+		 * top of the range and work downwards.
+		 */
+
+		/*
+		 * At the conclusion of the gr_next() search, we will either
+		 * have a presumed-free GID or we will be at GID_MIN - 1.
+		 */
+		if (lowest_found < gid_min) {
+			/*
+			 * In this case, a GID is in use at GID_MIN.
+			 *
+			 * We will reset the search to GID_MAX and proceed down
+			 * through all the GIDs (skipping those we detected with
+			 * used_gids) for a free one. It is a known issue that
+			 * this may result in reusing a previously-deleted GID,
+			 * so administrators should be instructed to use this
+			 * auto-detection with care (and prefer to assign GIDs
+			 * explicitly).
+			 */
+			lowest_found = gid_max;
+		}
+
+		/* Search through all of the IDs in the range */
+		for (id = lowest_found; id >= gid_min; id--) {
+			result = check_gid (id, gid_min, gid_max, used_gids);
+			if (result == 0) {
+				/* This GID is available. Return it. */
+				*gid = id;
+				free (used_gids);
+				return 0;
+			} else if (result == EEXIST || result == EINVAL) {
+				/*
+				 * This GID is in use or unusable, we'll
+				 * continue to the next.
+				 */
+			} else {
+				/*
+				 * An unexpected error occurred.
+				 *
+				 * Only report it the first time to avoid spamming
+				 * the logs
+				 *
+				 */
+				if (!nospam) {
+					fprintf (log_get_logfd(),
+						_("%s: Can't get unique system GID (%s). "
+						  "Suppressing additional messages.\n"),
+						log_get_progname(), strerror (result));
+					SYSLOG ((LOG_ERR,
+						"Error checking available GIDs: %s",
+						strerror (result)));
+					nospam = 1;
+				}
+				/*
+				 * We will continue anyway. Hopefully a later GID
+				 * will work properly.
+				 */
+			}
+		}
+
+		/*
+		 * If we get all the way through the loop, try again from GID_MAX,
+		 * unless that was where we previously started. (NOTE: the worst-case
+		 * scenario here is that we will run through (GID_MAX - GID_MIN - 1)
+		 * cycles *again* if we fall into this case with lowest_found as
+		 * GID_MAX - 1, all groups in the range in use and maintained by
+		 * network services such as LDAP.)
+		 */
+		if (lowest_found != gid_max) {
+			for (id = gid_max; id >= gid_min; id--) {
+				result = check_gid (id, gid_min, gid_max, used_gids);
+				if (result == 0) {
+					/* This GID is available. Return it. */
+					*gid = id;
+					free (used_gids);
+					return 0;
+				} else if (result == EEXIST || result == EINVAL) {
+					/*
+					 * This GID is in use or unusable, we'll
+					 * continue to the next.
+					 */
+				} else {
+					/*
+					 * An unexpected error occurred.
+					 *
+					 * Only report it the first time to avoid spamming
+					 * the logs
+					 *
+					 */
+					if (!nospam) {
+						fprintf (log_get_logfd(),
+							_("%s: Can't get unique system GID (%s). "
+							  "Suppressing additional messages.\n"),
+							log_get_progname(), strerror (result));
+						SYSLOG ((LOG_ERR,
+							"Error checking available GIDs: %s",
+							strerror (result)));
+						nospam = 1;
+					}
+					/*
+					 * We will continue anyway. Hopefully a later GID
+					 * will work properly.
+					 */
+				}
+			}
+		}
+	} else { /* !sys_group */
+		/*
+		 * For non-system groups, we want to start from the
+		 * bottom of the range and work upwards.
+		 */
+
+		/*
+		 * At the conclusion of the gr_next() search, we will either
+		 * have a presumed-free GID or we will be at GID_MAX + 1.
+		 */
+		if (highest_found > gid_max) {
+			/*
+			 * In this case, a GID is in use at GID_MAX.
+			 *
+			 * We will reset the search to GID_MIN and proceed up
+			 * through all the GIDs (skipping those we detected with
+			 * used_gids) for a free one. It is a known issue that
+			 * this may result in reusing a previously-deleted GID,
+			 * so administrators should be instructed to use this
+			 * auto-detection with care (and prefer to assign GIDs
+			 * explicitly).
+			 */
+			highest_found = gid_min;
+		}
+
+		/* Search through all of the IDs in the range */
+		for (id = highest_found; id <= gid_max; id++) {
+			result = check_gid (id, gid_min, gid_max, used_gids);
+			if (result == 0) {
+				/* This GID is available. Return it. */
+				*gid = id;
+				free (used_gids);
+				return 0;
+			} else if (result == EEXIST || result == EINVAL) {
+				/*
+				 * This GID is in use or unusable, we'll
+				 * continue to the next.
+				 */
+			} else {
+				/*
+				 * An unexpected error occurred.
+				 *
+				 * Only report it the first time to avoid spamming
+				 * the logs
+				 *
+				 */
+				if (!nospam) {
+					fprintf (log_get_logfd(),
+						_("%s: Can't get unique GID (%s). "
+						  "Suppressing additional messages.\n"),
+						log_get_progname(), strerror (result));
+					SYSLOG ((LOG_ERR,
+						"Error checking available GIDs: %s",
+						strerror (result)));
+					nospam = 1;
+				}
+				/*
+				 * We will continue anyway. Hopefully a later GID
+				 * will work properly.
+				 */
+			}
+		}
+
+		/*
+		 * If we get all the way through the loop, try again from GID_MIN,
+		 * unless that was where we previously started. (NOTE: the worst-case
+		 * scenario here is that we will run through (GID_MAX - GID_MIN - 1)
+		 * cycles *again* if we fall into this case with highest_found as
+		 * GID_MIN + 1, all groups in the range in use and maintained by
+		 * network services such as LDAP.)
+		 */
+		if (highest_found != gid_min) {
+			for (id = gid_min; id <= gid_max; id++) {
+				result = check_gid (id, gid_min, gid_max, used_gids);
+				if (result == 0) {
+					/* This GID is available. Return it. */
+					*gid = id;
+					free (used_gids);
+					return 0;
+				} else if (result == EEXIST || result == EINVAL) {
+					/*
+					 * This GID is in use or unusable, we'll
+					 * continue to the next.
+					 */
+				} else {
+					/*
+					 * An unexpected error occurred.
+					 *
+					 * Only report it the first time to avoid spamming
+					 * the logs
+					 *
+					 */
+					if (!nospam) {
+						fprintf (log_get_logfd(),
+							_("%s: Can't get unique GID (%s). "
+							  "Suppressing additional messages.\n"),
+							log_get_progname(), strerror (result));
+						SYSLOG ((LOG_ERR,
+							"Error checking available GIDs: %s",
+							strerror (result)));
+						nospam = 1;
+					}
+					/*
+					 * We will continue anyway. Hopefully a later GID
+					 * will work properly.
+					 */
+				}
+			}
+		}
+	}
+
+	/* The code reached here and found no available IDs in the range */
+	fprintf (log_get_logfd(),
+		_("%s: Can't get unique GID (no more available GIDs)\n"),
+		log_get_progname());
+	SYSLOG ((LOG_WARN, "no more available GIDs on the system"));
+	free (used_gids);
+	return -1;
+}
+
diff --git a/lib/find_new_sub_gids.c b/lib/find_new_sub_gids.c
new file mode 100644
index 0000000..74c9d8f
--- /dev/null
+++ b/lib/find_new_sub_gids.c
@@ -0,0 +1,64 @@
+/*
+ * SPDX-FileCopyrightText: 2012 Eric Biederman
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ifdef ENABLE_SUBIDS
+
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "prototypes.h"
+#include "subordinateio.h"
+#include "getdef.h"
+#include "shadowlog.h"
+
+/*
+ * find_new_sub_gids - Find a new unused range of GIDs.
+ *
+ * If successful, find_new_sub_gids provides a range of unused
+ * user IDs in the [SUB_GID_MIN:SUB_GID_MAX] range.
+ *
+ * Return 0 on success, -1 if no unused GIDs are available.
+ */
+int find_new_sub_gids (gid_t *range_start, unsigned long *range_count)
+{
+	unsigned long min, max;
+	unsigned long count;
+	gid_t start;
+
+	assert (range_start != NULL);
+	assert (range_count != NULL);
+
+	min = getdef_ulong ("SUB_GID_MIN", 100000UL);
+	max = getdef_ulong ("SUB_GID_MAX", 600100000UL);
+	count = getdef_ulong ("SUB_GID_COUNT", 65536);
+
+	if (min > max || count >= max || (min + count - 1) > max) {
+		(void) fprintf (log_get_logfd(),
+				_("%s: Invalid configuration: SUB_GID_MIN (%lu),"
+				  " SUB_GID_MAX (%lu), SUB_GID_COUNT (%lu)\n"),
+			log_get_progname(), min, max, count);
+		return -1;
+	}
+
+	start = sub_gid_find_free_range(min, max, count);
+	if (start == (gid_t)-1) {
+		fprintf (log_get_logfd(),
+		         _("%s: Can't get unique subordinate GID range\n"),
+		         log_get_progname());
+		SYSLOG ((LOG_WARN, "no more available subordinate GIDs on the system"));
+		return -1;
+	}
+	*range_start = start;
+	*range_count = count;
+	return 0;
+}
+#else				/* !ENABLE_SUBIDS */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* !ENABLE_SUBIDS */
+
diff --git a/lib/find_new_sub_uids.c b/lib/find_new_sub_uids.c
new file mode 100644
index 0000000..cc4b0cf
--- /dev/null
+++ b/lib/find_new_sub_uids.c
@@ -0,0 +1,64 @@
+/*
+ * SPDX-FileCopyrightText: 2012 Eric Biederman
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ifdef ENABLE_SUBIDS
+
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "prototypes.h"
+#include "subordinateio.h"
+#include "getdef.h"
+#include "shadowlog.h"
+
+/*
+ * find_new_sub_uids - Find a new unused range of UIDs.
+ *
+ * If successful, find_new_sub_uids provides a range of unused
+ * user IDs in the [SUB_UID_MIN:SUB_UID_MAX] range.
+ *
+ * Return 0 on success, -1 if no unused UIDs are available.
+ */
+int find_new_sub_uids (uid_t *range_start, unsigned long *range_count)
+{
+	unsigned long min, max;
+	unsigned long count;
+	uid_t start;
+
+	assert (range_start != NULL);
+	assert (range_count != NULL);
+
+	min = getdef_ulong ("SUB_UID_MIN", 100000UL);
+	max = getdef_ulong ("SUB_UID_MAX", 600100000UL);
+	count = getdef_ulong ("SUB_UID_COUNT", 65536);
+
+	if (min > max || count >= max || (min + count - 1) > max) {
+		(void) fprintf (log_get_logfd(),
+				_("%s: Invalid configuration: SUB_UID_MIN (%lu),"
+				  " SUB_UID_MAX (%lu), SUB_UID_COUNT (%lu)\n"),
+			log_get_progname(), min, max, count);
+		return -1;
+	}
+
+	start = sub_uid_find_free_range(min, max, count);
+	if (start == (uid_t)-1) {
+		fprintf (log_get_logfd(),
+		         _("%s: Can't get unique subordinate UID range\n"),
+		         log_get_progname());
+		SYSLOG ((LOG_WARN, "no more available subordinate UIDs on the system"));
+		return -1;
+	}
+	*range_start = start;
+	*range_count = count;
+	return 0;
+}
+#else				/* !ENABLE_SUBIDS */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* !ENABLE_SUBIDS */
+
diff --git a/lib/find_new_uid.c b/lib/find_new_uid.c
new file mode 100644
index 0000000..45ce712
--- /dev/null
+++ b/lib/find_new_uid.c
@@ -0,0 +1,500 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 2008 - 2011, Nicolas François
+ * SPDX-FileCopyrightText: 2014, Red Hat, Inc.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <assert.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "alloc.h"
+#include "prototypes.h"
+#include "pwio.h"
+#include "getdef.h"
+#include "shadowlog.h"
+
+/*
+ * get_ranges - Get the minimum and maximum ID ranges for the search
+ *
+ * This function will return the minimum and maximum ranges for IDs
+ *
+ * 0: The function completed successfully
+ * EINVAL: The provided ranges are impossible (such as maximum < minimum)
+ *
+ * preferred_min: The special-case minimum value for a specifically-
+ * requested ID, which may be lower than the standard min_id
+ */
+static int get_ranges (bool sys_user, uid_t *min_id, uid_t *max_id,
+			uid_t *preferred_min)
+{
+	uid_t uid_def_max = 0;
+
+	if (sys_user) {
+		/* System users */
+
+		/* A requested ID is allowed to be below the autoselect range */
+		*preferred_min = (uid_t) 1;
+
+		/* Get the minimum ID range from login.defs or default to 101 */
+		*min_id = getdef_ulong ("SYS_UID_MIN", 101UL);
+
+		/*
+		 * If SYS_UID_MAX is unspecified, we should assume it to be one
+		 * less than the UID_MIN (which is reserved for non-system accounts)
+		 */
+		uid_def_max = getdef_ulong ("UID_MIN", 1000UL) - 1;
+		*max_id = getdef_ulong ("SYS_UID_MAX", uid_def_max);
+
+		/* Check that the ranges make sense */
+		if (*max_id < *min_id) {
+			(void) fprintf (log_get_logfd(),
+                            _("%s: Invalid configuration: SYS_UID_MIN (%lu), "
+                              "UID_MIN (%lu), SYS_UID_MAX (%lu)\n"),
+                            log_get_progname(), (unsigned long) *min_id,
+                            getdef_ulong ("UID_MIN", 1000UL),
+                            (unsigned long) *max_id);
+			return EINVAL;
+		}
+		/*
+		 * Zero is reserved for root and the allocation algorithm does not
+		 * work right with it.
+		 */
+		if (*min_id == 0) {
+			*min_id = (uid_t) 1;
+		}
+	} else {
+		/* Non-system users */
+
+		/* Get the values from login.defs or use reasonable defaults */
+		*min_id = getdef_ulong ("UID_MIN", 1000UL);
+		*max_id = getdef_ulong ("UID_MAX", 60000UL);
+
+		/*
+		 * The preferred minimum should match the standard ID minimum
+		 * for non-system users.
+		 */
+		*preferred_min = *min_id;
+
+		/* Check that the ranges make sense */
+		if (*max_id < *min_id) {
+			(void) fprintf (log_get_logfd(),
+					_("%s: Invalid configuration: UID_MIN (%lu), "
+					  "UID_MAX (%lu)\n"),
+					log_get_progname(), (unsigned long) *min_id,
+					(unsigned long) *max_id);
+			return EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * check_uid - See if the requested UID is available
+ *
+ * On success, return 0
+ * If the ID is in use, return EEXIST
+ * If the ID might clash with -1, return EINVAL
+ * If the ID is outside the range, return ERANGE
+ * In other cases, return errno from getpwuid()
+ */
+static int check_uid(const uid_t uid,
+		     const uid_t uid_min,
+		     const uid_t uid_max,
+		     const bool *used_uids)
+{
+	/* First test that the preferred ID is in the range */
+	if (uid < uid_min || uid > uid_max) {
+		return ERANGE;
+	}
+
+	/* Check for compatibility with 16b and 32b uid_t error codes */
+	if (uid == UINT16_MAX || uid == UINT32_MAX) {
+		return EINVAL;
+	}
+
+	/*
+	 * Check whether we already detected this UID
+	 * using the pw_next() loop
+	 */
+	if (used_uids != NULL && used_uids[uid]) {
+		return EEXIST;
+	}
+	/* Check if the UID exists according to NSS */
+	errno = 0;
+	if (prefix_getpwuid(uid) != NULL) {
+		return EEXIST;
+	} else {
+		/* getpwuid() was NULL
+		 * we have to ignore errors as temporary
+		 * failures of remote user identity services
+		 * would completely block user/group creation
+		 */
+	}
+
+	/* If we've made it here, the UID must be available */
+	return 0;
+}
+
+/*
+ * find_new_uid - Find a new unused UID.
+ *
+ * If successful, find_new_uid provides an unused user ID in the
+ * [UID_MIN:UID_MAX] range.
+ * This ID should be higher than all the used UID, but if not possible,
+ * the lowest unused ID in the range will be returned.
+ *
+ * Return 0 on success, -1 if no unused UIDs are available.
+ */
+int find_new_uid(bool sys_user,
+                 uid_t *uid,
+                 /*@null@*/uid_t const *preferred_uid)
+{
+	bool *used_uids;
+	const struct passwd *pwd;
+	uid_t uid_min, uid_max, preferred_min;
+	uid_t id;
+	uid_t lowest_found, highest_found;
+	int result;
+	int nospam = 0;
+
+	assert (uid != NULL);
+
+	/*
+	 * First, figure out what ID range is appropriate for
+	 * automatic assignment
+	 */
+	result = get_ranges (sys_user, &uid_min, &uid_max, &preferred_min);
+	if (result == EINVAL) {
+		return -1;
+	}
+
+	/* Check if the preferred UID is available */
+	if (preferred_uid) {
+		result = check_uid (*preferred_uid, preferred_min, uid_max, NULL);
+		if (result == 0) {
+			/*
+			 * Make sure the UID isn't queued for use already
+			 */
+			if (pw_locate_uid (*preferred_uid) == NULL) {
+				*uid = *preferred_uid;
+				return 0;
+			}
+			/*
+			 * pw_locate_uid() found the UID in an as-yet uncommitted
+			 * entry. We'll proceed below and auto-set an UID.
+			 */
+		} else if (result == EEXIST || result == ERANGE || result == EINVAL) {
+			/*
+			 * Continue on below. At this time, we won't
+			 * treat these three cases differently.
+			 */
+		} else {
+			/*
+			 * An unexpected error occurred. We should report
+			 * this and fail the user creation.
+			 * This differs from the automatic creation
+			 * behavior below, since if a specific UID was
+			 * requested and generated an error, the user is
+			 * more likely to want to stop and address the
+			 * issue.
+			 */
+			fprintf (log_get_logfd(),
+				_("%s: Encountered error attempting to use "
+				  "preferred UID: %s\n"),
+				log_get_progname(), strerror (result));
+			return -1;
+		}
+	}
+
+	/*
+	 * Search the entire passwd file,
+	 * looking for the next unused value.
+	 *
+	 * We first check the local database with pw_rewind/pw_next to find
+	 * all local values that are in use.
+	 *
+	 * We then compare the next free value to all databases (local and
+	 * remote) and iterate until we find a free one. If there are free
+	 * values beyond the lowest (system users) or highest (non-system
+	 * users), we will prefer those and avoid potentially reclaiming a
+	 * deleted user (which can be a security issue, since it may grant
+	 * access to files belonging to that former user).
+	 *
+	 * If there are no UIDs available at the end of the search, we will
+	 * have no choice but to iterate through the range looking for gaps.
+	 *
+	 */
+
+	/* Create an array to hold all of the discovered UIDs */
+	used_uids = CALLOC(uid_max + 1, bool);
+	if (NULL == used_uids) {
+		fprintf (log_get_logfd(),
+			 _("%s: failed to allocate memory: %s\n"),
+			 log_get_progname(), strerror (errno));
+		return -1;
+	}
+
+	/* First look for the lowest and highest value in the local database */
+	(void) pw_rewind ();
+	highest_found = uid_min;
+	lowest_found = uid_max;
+	while ((pwd = pw_next ()) != NULL) {
+		/*
+		 * Does this entry have a lower UID than the lowest we've found
+		 * so far?
+		 */
+		if ((pwd->pw_uid <= lowest_found) && (pwd->pw_uid >= uid_min)) {
+			lowest_found = pwd->pw_uid - 1;
+		}
+
+		/*
+		 * Does this entry have a higher UID than the highest we've found
+		 * so far?
+		 */
+		if ((pwd->pw_uid >= highest_found) && (pwd->pw_uid <= uid_max)) {
+			highest_found = pwd->pw_uid + 1;
+		}
+
+		/* create index of used UIDs */
+		if (pwd->pw_uid >= uid_min
+			&& pwd->pw_uid <= uid_max) {
+
+			used_uids[pwd->pw_uid] = true;
+		}
+	}
+
+	if (sys_user) {
+		/*
+		 * For system users, we want to start from the
+		 * top of the range and work downwards.
+		 */
+
+		/*
+		 * At the conclusion of the pw_next() search, we will either
+		 * have a presumed-free UID or we will be at UID_MIN - 1.
+		 */
+		if (lowest_found < uid_min) {
+			/*
+			 * In this case, an UID is in use at UID_MIN.
+			 *
+			 * We will reset the search to UID_MAX and proceed down
+			 * through all the UIDs (skipping those we detected with
+			 * used_uids) for a free one. It is a known issue that
+			 * this may result in reusing a previously-deleted UID,
+			 * so administrators should be instructed to use this
+			 * auto-detection with care (and prefer to assign UIDs
+			 * explicitly).
+			 */
+			lowest_found = uid_max;
+		}
+
+		/* Search through all of the IDs in the range */
+		for (id = lowest_found; id >= uid_min; id--) {
+			result = check_uid (id, uid_min, uid_max, used_uids);
+			if (result == 0) {
+				/* This UID is available. Return it. */
+				*uid = id;
+				free (used_uids);
+				return 0;
+			} else if (result == EEXIST || result == EINVAL) {
+				/*
+				 * This GID is in use or unusable, we'll
+				 * continue to the next.
+				 */
+			} else {
+				/*
+				 * An unexpected error occurred.
+				 *
+				 * Only report it the first time to avoid spamming
+				 * the logs
+				 *
+				 */
+				if (!nospam) {
+					fprintf (log_get_logfd(),
+						_("%s: Can't get unique system UID (%s). "
+						  "Suppressing additional messages.\n"),
+						log_get_progname(), strerror (result));
+					SYSLOG ((LOG_ERR,
+						"Error checking available UIDs: %s",
+						strerror (result)));
+					nospam = 1;
+				}
+				/*
+				 * We will continue anyway. Hopefully a later UID
+				 * will work properly.
+				 */
+			}
+		}
+
+		/*
+		 * If we get all the way through the loop, try again from UID_MAX,
+		 * unless that was where we previously started. (NOTE: the worst-case
+		 * scenario here is that we will run through (UID_MAX - UID_MIN - 1)
+		 * cycles *again* if we fall into this case with lowest_found as
+		 * UID_MAX - 1, all users in the range in use and maintained by
+		 * network services such as LDAP.)
+		 */
+		if (lowest_found != uid_max) {
+			for (id = uid_max; id >= uid_min; id--) {
+				result = check_uid (id, uid_min, uid_max, used_uids);
+				if (result == 0) {
+					/* This UID is available. Return it. */
+					*uid = id;
+					free (used_uids);
+					return 0;
+				} else if (result == EEXIST || result == EINVAL) {
+					/*
+					 * This GID is in use or unusable, we'll
+					 * continue to the next.
+					 */
+				} else {
+					/*
+					 * An unexpected error occurred.
+					 *
+					 * Only report it the first time to avoid spamming
+					 * the logs
+					 *
+					 */
+					if (!nospam) {
+						fprintf (log_get_logfd(),
+							_("%s: Can't get unique system UID (%s). "
+							  "Suppressing additional messages.\n"),
+							log_get_progname(), strerror (result));
+						SYSLOG((LOG_ERR,
+							"Error checking available UIDs: %s",
+							strerror (result)));
+						nospam = 1;
+					}
+					/*
+					 * We will continue anyway. Hopefully a later UID
+					 * will work properly.
+					 */
+				}
+			}
+		}
+	} else { /* !sys_user */
+		/*
+		 * For non-system users, we want to start from the
+		 * bottom of the range and work upwards.
+		 */
+
+		/*
+		 * At the conclusion of the pw_next() search, we will either
+		 * have a presumed-free UID or we will be at UID_MAX + 1.
+		 */
+		if (highest_found > uid_max) {
+			/*
+			 * In this case, a UID is in use at UID_MAX.
+			 *
+			 * We will reset the search to UID_MIN and proceed up
+			 * through all the UIDs (skipping those we detected with
+			 * used_uids) for a free one. It is a known issue that
+			 * this may result in reusing a previously-deleted UID,
+			 * so administrators should be instructed to use this
+			 * auto-detection with care (and prefer to assign UIDs
+			 * explicitly).
+			 */
+			highest_found = uid_min;
+		}
+
+		/* Search through all of the IDs in the range */
+		for (id = highest_found; id <= uid_max; id++) {
+			result = check_uid (id, uid_min, uid_max, used_uids);
+			if (result == 0) {
+				/* This UID is available. Return it. */
+				*uid = id;
+				free (used_uids);
+				return 0;
+			} else if (result == EEXIST || result == EINVAL) {
+				/*
+				 * This GID is in use or unusable, we'll
+				 * continue to the next.
+				 */
+			} else {
+				/*
+				 * An unexpected error occurred.
+				 *
+				 * Only report it the first time to avoid spamming
+				 * the logs
+				 *
+				 */
+				if (!nospam) {
+					fprintf (log_get_logfd(),
+						_("%s: Can't get unique UID (%s). "
+						  "Suppressing additional messages.\n"),
+						log_get_progname(), strerror (result));
+					SYSLOG ((LOG_ERR,
+						"Error checking available UIDs: %s",
+						strerror (result)));
+					nospam = 1;
+				}
+				/*
+				 * We will continue anyway. Hopefully a later UID
+				 * will work properly.
+				 */
+			}
+		}
+
+		/*
+		 * If we get all the way through the loop, try again from UID_MIN,
+		 * unless that was where we previously started. (NOTE: the worst-case
+		 * scenario here is that we will run through (UID_MAX - UID_MIN - 1)
+		 * cycles *again* if we fall into this case with highest_found as
+		 * UID_MIN + 1, all users in the range in use and maintained by
+		 * network services such as LDAP.)
+		 */
+		if (highest_found != uid_min) {
+			for (id = uid_min; id <= uid_max; id++) {
+				result = check_uid (id, uid_min, uid_max, used_uids);
+				if (result == 0) {
+					/* This UID is available. Return it. */
+					*uid = id;
+					free (used_uids);
+					return 0;
+				} else if (result == EEXIST || result == EINVAL) {
+					/*
+					 * This GID is in use or unusable, we'll
+					 * continue to the next.
+					 */
+				} else {
+					/*
+					 * An unexpected error occurred.
+					 *
+					 * Only report it the first time to avoid spamming
+					 * the logs
+					 *
+					 */
+					if (!nospam) {
+						fprintf (log_get_logfd(),
+							_("%s: Can't get unique UID (%s). "
+							  "Suppressing additional messages.\n"),
+							log_get_progname(), strerror (result));
+						SYSLOG ((LOG_ERR,
+							"Error checking available UIDs: %s",
+							strerror (result)));
+						nospam = 1;
+					}
+					/*
+					 * We will continue anyway. Hopefully a later UID
+					 * will work properly.
+					 */
+				}
+			}
+		}
+	}
+
+	/* The code reached here and found no available IDs in the range */
+	fprintf (log_get_logfd(),
+		_("%s: Can't get unique UID (no more available UIDs)\n"),
+		log_get_progname());
+	SYSLOG ((LOG_WARN, "no more available UIDs on the system"));
+	free (used_uids);
+	return -1;
+}
+
diff --git a/lib/fputsx.c b/lib/fputsx.c
index bb71ab2..0565310 100644
--- a/lib/fputsx.c
+++ b/lib/fputsx.c
@@ -16,7 +16,8 @@
 #ident "$Id$"
 
 
-/*@null@*/char *fgetsx (/*@returned@*/ /*@out@*/char *buf, int cnt, FILE * f)
+/*@null@*/char *
+fgetsx(/*@returned@*/char *restrict buf, int cnt, FILE *restrict f)
 {
 	char *cp = buf;
 	char *ep;
diff --git a/lib/freezero.c b/lib/freezero.c
new file mode 100644
index 0000000..c565f43
--- /dev/null
+++ b/lib/freezero.c
@@ -0,0 +1,30 @@
+/*	$OpenBSD: malloc.c,v 1.267 2020/11/23 15:42:11 otto Exp $	*/
+/*
+ * Copyright (c) 2008, 2010, 2011, 2016 Otto Moerbeek <otto@drijf.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+void
+freezero(void *ptr, size_t sz)
+{
+	/* This is legal. */
+	if (ptr == NULL)
+		return;
+
+	explicit_bzero(ptr, sz);
+	free(ptr);
+}
diff --git a/lib/freezero.h b/lib/freezero.h
new file mode 100644
index 0000000..8dbcd7c
--- /dev/null
+++ b/lib/freezero.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright © 2005 Aurelien Jarno
+ * Copyright © 2006 Robert Millan
+ * Copyright © 2008-2011 Guillem Jover <guillem@hadrons.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
+ * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LIBBSD_FREEZERO_H
+#define LIBBSD_FREEZERO_H
+
+void freezero(void *ptr, size_t size);
+
+#endif
diff --git a/lib/get_gid.c b/lib/get_gid.c
index cbcd6f4..2420137 100644
--- a/lib/get_gid.c
+++ b/lib/get_gid.c
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+
 #include <config.h>
 
 #ident "$Id$"
@@ -11,21 +12,23 @@
 #include "prototypes.h"
 #include "defines.h"
 
-int get_gid (const char *gidstr, gid_t *gid)
+
+int
+get_gid(const char *gidstr, gid_t *gid)
 {
-	long long int val;
-	char *endptr;
+	char       *end;
+	long long  val;
 
 	errno = 0;
-	val = strtoll (gidstr, &endptr, 10);
+	val = strtoll(gidstr, &end, 10);
 	if (   ('\0' == *gidstr)
-	    || ('\0' != *endptr)
-	    || (ERANGE == errno)
+	    || ('\0' != *end)
+	    || (0 != errno)
 	    || (/*@+longintegral@*/val != (gid_t)val)/*@=longintegral@*/) {
-		return 0;
+		return -1;
 	}
 
-	*gid = (gid_t)val;
-	return 1;
+	*gid = val;
+	return 0;
 }
 
diff --git a/lib/get_pid.c b/lib/get_pid.c
index 383eb69..af3f2f8 100644
--- a/lib/get_pid.c
+++ b/lib/get_pid.c
@@ -10,22 +10,94 @@
 
 #include "prototypes.h"
 #include "defines.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 
-int get_pid (const char *pidstr, pid_t *pid)
+#include "string/sprintf.h"
+
+
+int
+get_pid(const char *pidstr, pid_t *pid)
 {
-	long long int val;
-	char *endptr;
+	char       *end;
+	long long  val;
 
 	errno = 0;
-	val = strtoll (pidstr, &endptr, 10);
+	val = strtoll(pidstr, &end, 10);
 	if (   ('\0' == *pidstr)
-	    || ('\0' != *endptr)
-	    || (ERANGE == errno)
+	    || ('\0' != *end)
+	    || (0 != errno)
+	    || (val < 1)
 	    || (/*@+longintegral@*/val != (pid_t)val)/*@=longintegral@*/) {
-		return 0;
+		return -1;
 	}
 
-	*pid = (pid_t)val;
-	return 1;
+	*pid = val;
+	return 0;
 }
 
+/*
+ * If use passed in fd:4 as an argument, then return the
+ * value '4', the fd to use.
+ * On error, return -1.
+ */
+int get_pidfd_from_fd(const char *pidfdstr)
+{
+	char         *end;
+	long long    val;
+	struct stat  st;
+	dev_t proc_st_dev, proc_st_rdev;
+
+	errno = 0;
+	val = strtoll(pidfdstr, &end, 10);
+	if (   ('\0' == *pidfdstr)
+	    || ('\0' != *end)
+	    || (0 != errno)
+	    || (val < 0)
+	    || (/*@+longintegral@*/val != (int)val)/*@=longintegral@*/) {
+		return -1;
+	}
+
+	if (stat("/proc/self/uid_map", &st) < 0) {
+		return -1;
+	}
+
+	proc_st_dev = st.st_dev;
+	proc_st_rdev = st.st_rdev;
+
+	if (fstat(val, &st) < 0) {
+		return -1;
+	}
+
+	if (st.st_dev != proc_st_dev || st.st_rdev != proc_st_rdev) {
+		return -1;
+	}
+
+	return (int)val;
+}
+
+int open_pidfd(const char *pidstr)
+{
+	int    proc_dir_fd;
+	char   proc_dir_name[32];
+	pid_t  target;
+
+	if (get_pid(pidstr, &target) == -1)
+		return -ENOENT;
+
+	/* max string length is 6 + 10 + 1 + 1 = 18, allocate 32 bytes */
+	if (SNPRINTF(proc_dir_name, "/proc/%u/", target) == -1) {
+		fprintf(stderr, "snprintf of proc path failed for %u: %s\n",
+			target, strerror(errno));
+		return -EINVAL;
+	}
+
+	proc_dir_fd = open(proc_dir_name, O_DIRECTORY);
+	if (proc_dir_fd < 0) {
+		fprintf(stderr, _("Could not open proc directory for target %u: %s\n"),
+			target, strerror(errno));
+		return -EINVAL;
+	}
+	return proc_dir_fd;
+}
diff --git a/lib/get_uid.c b/lib/get_uid.c
index 50f9922..77fe966 100644
--- a/lib/get_uid.c
+++ b/lib/get_uid.c
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+
 #include <config.h>
 
 #ident "$Id$"
@@ -11,21 +12,23 @@
 #include "prototypes.h"
 #include "defines.h"
 
-int get_uid (const char *uidstr, uid_t *uid)
+
+int
+get_uid(const char *uidstr, uid_t *uid)
 {
-	long long int val;
-	char *endptr;
+	char       *end;
+	long long  val;
 
 	errno = 0;
-	val = strtoll (uidstr, &endptr, 10);
+	val = strtoll(uidstr, &end, 10);
 	if (   ('\0' == *uidstr)
-	    || ('\0' != *endptr)
-	    || (ERANGE == errno)
+	    || ('\0' != *end)
+	    || (0 != errno)
 	    || (/*@+longintegral@*/val != (uid_t)val)/*@=longintegral@*/) {
-		return 0;
+		return -1;
 	}
 
-	*uid = (uid_t)val;
-	return 1;
+	*uid = val;
+	return 0;
 }
 
diff --git a/lib/getdate.c b/lib/getdate.c
new file mode 100644
index 0000000..556ce62
--- /dev/null
+++ b/lib/getdate.c
@@ -0,0 +1,2535 @@
+/* A Bison parser, made by GNU Bison 3.8.2.  */
+
+/* Bison implementation for Yacc-like parsers in C
+
+   Copyright (C) 1984, 1989-1990, 2000-2015, 2018-2021 Free Software Foundation,
+   Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* As a special exception, you may create a larger work that contains
+   part or all of the Bison parser skeleton and distribute that work
+   under terms of your choice, so long as that work isn't itself a
+   parser generator using the skeleton or a modified version thereof
+   as a parser skeleton.  Alternatively, if you modify or redistribute
+   the parser skeleton itself, you may (at your option) remove this
+   special exception, which will cause the skeleton and the resulting
+   Bison output files to be licensed under the GNU General Public
+   License without this special exception.
+
+   This special exception was added by the Free Software Foundation in
+   version 2.2 of Bison.  */
+
+/* C LALR(1) parser skeleton written by Richard Stallman, by
+   simplifying the original so-called "semantic" parser.  */
+
+/* DO NOT RELY ON FEATURES THAT ARE NOT DOCUMENTED in the manual,
+   especially those whose name start with YY_ or yy_.  They are
+   private implementation details that can be changed or removed.  */
+
+/* All symbols defined below should begin with yy or YY, to avoid
+   infringing on user name space.  This should be done even for local
+   variables, as they might otherwise be expanded by user macros.
+   There are some unavoidable exceptions within include files to
+   define necessary library symbols; they are noted "INFRINGES ON
+   USER NAME SPACE" below.  */
+
+/* Identify Bison output, and Bison version.  */
+#define YYBISON 30802
+
+/* Bison version string.  */
+#define YYBISON_VERSION "3.8.2"
+
+/* Skeleton name.  */
+#define YYSKELETON_NAME "yacc.c"
+
+/* Pure parsers.  */
+#define YYPURE 0
+
+/* Push parsers.  */
+#define YYPUSH 0
+
+/* Pull parsers.  */
+#define YYPULL 1
+
+
+
+
+/* First part of user prologue.  */
+#line 1 "getdate.y"
+
+/*
+**  Originally written by Steven M. Bellovin <smb@research.att.com> while
+**  at the University of North Carolina at Chapel Hill.  Later tweaked by
+**  a couple of people on Usenet.  Completely overhauled by Rich $alz
+**  <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
+**
+**  This grammar has 13 shift/reduce conflicts.
+**
+**  This code is in the public domain and has no copyright.
+*/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Since the code of getdate.y is not included in the Emacs executable
+   itself, there is no need to #define static in this file.  Even if
+   the code were included in the Emacs executable, it probably
+   wouldn't do any harm to #undef it here; this will only cause
+   problems if we try to write to a static variable, which I don't
+   think this code needs to do.  */
+#ifdef emacs
+# undef static
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <time.h>
+
+#include "attr.h"
+#include "getdate.h"
+
+#include <string.h>
+
+/* Some old versions of bison generate parsers that use bcopy.
+   That loses on systems that don't provide the function, so we have
+   to redefine it here.  */
+#if !defined (HAVE_BCOPY) && !defined (bcopy)
+# define bcopy(from, to, len) memcpy ((to), (from), (len))
+#endif
+
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
+   as well as gratuitously global symbol names, so we can have multiple
+   yacc generated parsers in the same program.  Note that these are only
+   the variables produced by yacc.  If other parser generators (bison,
+   byacc, etc) produce additional global names that conflict at link time,
+   then those parser generators need to be fixed instead of adding those
+   names to this list. */
+
+#define yymaxdepth gd_maxdepth
+#define yyparse gd_parse
+#define yylex   gd_lex
+#define yyerror gd_error
+#define yylval  gd_lval
+#define yychar  gd_char
+#define yydebug gd_debug
+#define yypact  gd_pact
+#define yyr1    gd_r1
+#define yyr2    gd_r2
+#define yydef   gd_def
+#define yychk   gd_chk
+#define yypgo   gd_pgo
+#define yyact   gd_act
+#define yyexca  gd_exca
+#define yyerrflag gd_errflag
+#define yynerrs gd_nerrs
+#define yyps    gd_ps
+#define yypv    gd_pv
+#define yys     gd_s
+#define yy_yys  gd_yys
+#define yystate gd_state
+#define yytmp   gd_tmp
+#define yyv     gd_v
+#define yy_yyv  gd_yyv
+#define yyval   gd_val
+#define yylloc  gd_lloc
+#define yyreds  gd_reds          /* With YYDEBUG defined */
+#define yytoks  gd_toks          /* With YYDEBUG defined */
+#define yylhs   gd_yylhs
+#define yylen   gd_yylen
+#define yydefred gd_yydefred
+#define yydgoto gd_yydgoto
+#define yysindex gd_yysindex
+#define yyrindex gd_yyrindex
+#define yygindex gd_yygindex
+#define yytable  gd_yytable
+#define yycheck  gd_yycheck
+
+static int yylex (void);
+static int yyerror (const char *s);
+
+#define EPOCH		1970
+#define HOUR(x)		((x) * 60)
+
+#define MAX_BUFF_LEN    128   /* size of buffer to read the date into */
+
+/*
+**  An entry in the lexical lookup table.
+*/
+typedef struct _TABLE {
+    const char	*name;
+    int		type;
+    int		value;
+} TABLE;
+
+
+/*
+**  Meridian:  am, pm, or 24-hour style.
+*/
+typedef enum _MERIDIAN {
+    MERam, MERpm, MER24
+} MERIDIAN;
+
+
+/*
+**  Global variables.  We could get rid of most of these by using a good
+**  union as the yacc stack.  (This routine was originally written before
+**  yacc had the %union construct.)  Maybe someday; right now we only use
+**  the %union very rarely.
+*/
+static const char	*yyInput;
+static int	yyDayOrdinal;
+static int	yyDayNumber;
+static int	yyHaveDate;
+static int	yyHaveDay;
+static int	yyHaveRel;
+static int	yyHaveTime;
+static int	yyHaveZone;
+static int	yyTimezone;
+static int	yyDay;
+static int	yyHour;
+static int	yyMinutes;
+static int	yyMonth;
+static int	yySeconds;
+static int	yyYear;
+static MERIDIAN	yyMeridian;
+static int	yyRelDay;
+static int	yyRelHour;
+static int	yyRelMinutes;
+static int	yyRelMonth;
+static int	yyRelSeconds;
+static int	yyRelYear;
+
+
+#line 217 "getdate.c"
+
+# ifndef YY_CAST
+#  ifdef __cplusplus
+#   define YY_CAST(Type, Val) static_cast<Type> (Val)
+#   define YY_REINTERPRET_CAST(Type, Val) reinterpret_cast<Type> (Val)
+#  else
+#   define YY_CAST(Type, Val) ((Type) (Val))
+#   define YY_REINTERPRET_CAST(Type, Val) ((Type) (Val))
+#  endif
+# endif
+# ifndef YY_NULLPTR
+#  if defined __cplusplus
+#   if 201103L <= __cplusplus
+#    define YY_NULLPTR nullptr
+#   else
+#    define YY_NULLPTR 0
+#   endif
+#  else
+#   define YY_NULLPTR ((void*)0)
+#  endif
+# endif
+
+
+/* Debug traces.  */
+#ifndef YYDEBUG
+# define YYDEBUG 0
+#endif
+#if YYDEBUG
+extern int yydebug;
+#endif
+
+/* Token kinds.  */
+#ifndef YYTOKENTYPE
+# define YYTOKENTYPE
+  enum yytokentype
+  {
+    YYEMPTY = -2,
+    YYEOF = 0,                     /* "end of file"  */
+    YYerror = 256,                 /* error  */
+    YYUNDEF = 257,                 /* "invalid token"  */
+    tAGO = 258,                    /* tAGO  */
+    tDAY = 259,                    /* tDAY  */
+    tDAY_UNIT = 260,               /* tDAY_UNIT  */
+    tDAYZONE = 261,                /* tDAYZONE  */
+    tDST = 262,                    /* tDST  */
+    tHOUR_UNIT = 263,              /* tHOUR_UNIT  */
+    tID = 264,                     /* tID  */
+    tMERIDIAN = 265,               /* tMERIDIAN  */
+    tMINUTE_UNIT = 266,            /* tMINUTE_UNIT  */
+    tMONTH = 267,                  /* tMONTH  */
+    tMONTH_UNIT = 268,             /* tMONTH_UNIT  */
+    tSEC_UNIT = 269,               /* tSEC_UNIT  */
+    tSNUMBER = 270,                /* tSNUMBER  */
+    tUNUMBER = 271,                /* tUNUMBER  */
+    tYEAR_UNIT = 272,              /* tYEAR_UNIT  */
+    tZONE = 273                    /* tZONE  */
+  };
+  typedef enum yytokentype yytoken_kind_t;
+#endif
+/* Token kinds.  */
+#define YYEMPTY -2
+#define YYEOF 0
+#define YYerror 256
+#define YYUNDEF 257
+#define tAGO 258
+#define tDAY 259
+#define tDAY_UNIT 260
+#define tDAYZONE 261
+#define tDST 262
+#define tHOUR_UNIT 263
+#define tID 264
+#define tMERIDIAN 265
+#define tMINUTE_UNIT 266
+#define tMONTH 267
+#define tMONTH_UNIT 268
+#define tSEC_UNIT 269
+#define tSNUMBER 270
+#define tUNUMBER 271
+#define tYEAR_UNIT 272
+#define tZONE 273
+
+/* Value type.  */
+#if ! defined YYSTYPE && ! defined YYSTYPE_IS_DECLARED
+union YYSTYPE
+{
+#line 147 "getdate.y"
+
+    int			Number;
+    enum _MERIDIAN	Meridian;
+
+#line 308 "getdate.c"
+
+};
+typedef union YYSTYPE YYSTYPE;
+# define YYSTYPE_IS_TRIVIAL 1
+# define YYSTYPE_IS_DECLARED 1
+#endif
+
+
+extern YYSTYPE yylval;
+
+
+int yyparse (void);
+
+
+
+/* Symbol kind.  */
+enum yysymbol_kind_t
+{
+  YYSYMBOL_YYEMPTY = -2,
+  YYSYMBOL_YYEOF = 0,                      /* "end of file"  */
+  YYSYMBOL_YYerror = 1,                    /* error  */
+  YYSYMBOL_YYUNDEF = 2,                    /* "invalid token"  */
+  YYSYMBOL_tAGO = 3,                       /* tAGO  */
+  YYSYMBOL_tDAY = 4,                       /* tDAY  */
+  YYSYMBOL_tDAY_UNIT = 5,                  /* tDAY_UNIT  */
+  YYSYMBOL_tDAYZONE = 6,                   /* tDAYZONE  */
+  YYSYMBOL_tDST = 7,                       /* tDST  */
+  YYSYMBOL_tHOUR_UNIT = 8,                 /* tHOUR_UNIT  */
+  YYSYMBOL_tID = 9,                        /* tID  */
+  YYSYMBOL_tMERIDIAN = 10,                 /* tMERIDIAN  */
+  YYSYMBOL_tMINUTE_UNIT = 11,              /* tMINUTE_UNIT  */
+  YYSYMBOL_tMONTH = 12,                    /* tMONTH  */
+  YYSYMBOL_tMONTH_UNIT = 13,               /* tMONTH_UNIT  */
+  YYSYMBOL_tSEC_UNIT = 14,                 /* tSEC_UNIT  */
+  YYSYMBOL_tSNUMBER = 15,                  /* tSNUMBER  */
+  YYSYMBOL_tUNUMBER = 16,                  /* tUNUMBER  */
+  YYSYMBOL_tYEAR_UNIT = 17,                /* tYEAR_UNIT  */
+  YYSYMBOL_tZONE = 18,                     /* tZONE  */
+  YYSYMBOL_19_ = 19,                       /* ':'  */
+  YYSYMBOL_20_ = 20,                       /* ','  */
+  YYSYMBOL_21_ = 21,                       /* '/'  */
+  YYSYMBOL_YYACCEPT = 22,                  /* $accept  */
+  YYSYMBOL_spec = 23,                      /* spec  */
+  YYSYMBOL_item = 24,                      /* item  */
+  YYSYMBOL_time = 25,                      /* time  */
+  YYSYMBOL_zone = 26,                      /* zone  */
+  YYSYMBOL_day = 27,                       /* day  */
+  YYSYMBOL_date = 28,                      /* date  */
+  YYSYMBOL_rel = 29,                       /* rel  */
+  YYSYMBOL_relunit = 30,                   /* relunit  */
+  YYSYMBOL_number = 31,                    /* number  */
+  YYSYMBOL_o_merid = 32                    /* o_merid  */
+};
+typedef enum yysymbol_kind_t yysymbol_kind_t;
+
+
+
+
+#ifdef short
+# undef short
+#endif
+
+/* On compilers that do not define __PTRDIFF_MAX__ etc., make sure
+   <limits.h> and (if available) <stdint.h> are included
+   so that the code can choose integer types of a good width.  */
+
+#ifndef __PTRDIFF_MAX__
+# include <limits.h> /* INFRINGES ON USER NAME SPACE */
+# if defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__
+#  include <stdint.h> /* INFRINGES ON USER NAME SPACE */
+#  define YY_STDINT_H
+# endif
+#endif
+
+/* Narrow types that promote to a signed type and that can represent a
+   signed or unsigned integer of at least N bits.  In tables they can
+   save space and decrease cache pressure.  Promoting to a signed type
+   helps avoid bugs in integer arithmetic.  */
+
+#ifdef __INT_LEAST8_MAX__
+typedef __INT_LEAST8_TYPE__ yytype_int8;
+#elif defined YY_STDINT_H
+typedef int_least8_t yytype_int8;
+#else
+typedef signed char yytype_int8;
+#endif
+
+#ifdef __INT_LEAST16_MAX__
+typedef __INT_LEAST16_TYPE__ yytype_int16;
+#elif defined YY_STDINT_H
+typedef int_least16_t yytype_int16;
+#else
+typedef short yytype_int16;
+#endif
+
+/* Work around bug in HP-UX 11.23, which defines these macros
+   incorrectly for preprocessor constants.  This workaround can likely
+   be removed in 2023, as HPE has promised support for HP-UX 11.23
+   (aka HP-UX 11i v2) only through the end of 2022; see Table 2 of
+   <https://h20195.www2.hpe.com/V2/getpdf.aspx/4AA4-7673ENW.pdf>.  */
+#ifdef __hpux
+# undef UINT_LEAST8_MAX
+# undef UINT_LEAST16_MAX
+# define UINT_LEAST8_MAX 255
+# define UINT_LEAST16_MAX 65535
+#endif
+
+#if defined __UINT_LEAST8_MAX__ && __UINT_LEAST8_MAX__ <= __INT_MAX__
+typedef __UINT_LEAST8_TYPE__ yytype_uint8;
+#elif (!defined __UINT_LEAST8_MAX__ && defined YY_STDINT_H \
+       && UINT_LEAST8_MAX <= INT_MAX)
+typedef uint_least8_t yytype_uint8;
+#elif !defined __UINT_LEAST8_MAX__ && UCHAR_MAX <= INT_MAX
+typedef unsigned char yytype_uint8;
+#else
+typedef short yytype_uint8;
+#endif
+
+#if defined __UINT_LEAST16_MAX__ && __UINT_LEAST16_MAX__ <= __INT_MAX__
+typedef __UINT_LEAST16_TYPE__ yytype_uint16;
+#elif (!defined __UINT_LEAST16_MAX__ && defined YY_STDINT_H \
+       && UINT_LEAST16_MAX <= INT_MAX)
+typedef uint_least16_t yytype_uint16;
+#elif !defined __UINT_LEAST16_MAX__ && USHRT_MAX <= INT_MAX
+typedef unsigned short yytype_uint16;
+#else
+typedef int yytype_uint16;
+#endif
+
+#ifndef YYPTRDIFF_T
+# if defined __PTRDIFF_TYPE__ && defined __PTRDIFF_MAX__
+#  define YYPTRDIFF_T __PTRDIFF_TYPE__
+#  define YYPTRDIFF_MAXIMUM __PTRDIFF_MAX__
+# elif defined PTRDIFF_MAX
+#  ifndef ptrdiff_t
+#   include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+#  endif
+#  define YYPTRDIFF_T ptrdiff_t
+#  define YYPTRDIFF_MAXIMUM PTRDIFF_MAX
+# else
+#  define YYPTRDIFF_T long
+#  define YYPTRDIFF_MAXIMUM LONG_MAX
+# endif
+#endif
+
+#ifndef YYSIZE_T
+# ifdef __SIZE_TYPE__
+#  define YYSIZE_T __SIZE_TYPE__
+# elif defined size_t
+#  define YYSIZE_T size_t
+# elif defined __STDC_VERSION__ && 199901 <= __STDC_VERSION__
+#  include <stddef.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYSIZE_T size_t
+# else
+#  define YYSIZE_T unsigned
+# endif
+#endif
+
+#define YYSIZE_MAXIMUM                                  \
+  YY_CAST (YYPTRDIFF_T,                                 \
+           (YYPTRDIFF_MAXIMUM < YY_CAST (YYSIZE_T, -1)  \
+            ? YYPTRDIFF_MAXIMUM                         \
+            : YY_CAST (YYSIZE_T, -1)))
+
+#define YYSIZEOF(X) YY_CAST (YYPTRDIFF_T, sizeof (X))
+
+
+/* Stored state numbers (used for stacks). */
+typedef yytype_int8 yy_state_t;
+
+/* State numbers in computations.  */
+typedef int yy_state_fast_t;
+
+#ifndef YY_
+# if defined YYENABLE_NLS && YYENABLE_NLS
+#  if ENABLE_NLS
+#   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
+#   define YY_(Msgid) dgettext ("bison-runtime", Msgid)
+#  endif
+# endif
+# ifndef YY_
+#  define YY_(Msgid) Msgid
+# endif
+#endif
+
+
+#ifndef YY_ATTRIBUTE_PURE
+# if defined __GNUC__ && 2 < __GNUC__ + (96 <= __GNUC_MINOR__)
+#  define YY_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define YY_ATTRIBUTE_PURE
+# endif
+#endif
+
+#ifndef YY_ATTRIBUTE_UNUSED
+# if defined __GNUC__ && 2 < __GNUC__ + (7 <= __GNUC_MINOR__)
+#  define YY_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+# else
+#  define YY_ATTRIBUTE_UNUSED
+# endif
+#endif
+
+/* Suppress unused-variable warnings by "using" E.  */
+#if ! defined lint || defined __GNUC__
+# define YY_USE(E) ((void) (E))
+#else
+# define YY_USE(E) /* empty */
+#endif
+
+/* Suppress an incorrect diagnostic about yylval being uninitialized.  */
+#if defined __GNUC__ && ! defined __ICC && 406 <= __GNUC__ * 100 + __GNUC_MINOR__
+# if __GNUC__ * 100 + __GNUC_MINOR__ < 407
+#  define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN                           \
+    _Pragma ("GCC diagnostic push")                                     \
+    _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")
+# else
+#  define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN                           \
+    _Pragma ("GCC diagnostic push")                                     \
+    _Pragma ("GCC diagnostic ignored \"-Wuninitialized\"")              \
+    _Pragma ("GCC diagnostic ignored \"-Wmaybe-uninitialized\"")
+# endif
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END      \
+    _Pragma ("GCC diagnostic pop")
+#else
+# define YY_INITIAL_VALUE(Value) Value
+#endif
+#ifndef YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+# define YY_IGNORE_MAYBE_UNINITIALIZED_END
+#endif
+#ifndef YY_INITIAL_VALUE
+# define YY_INITIAL_VALUE(Value) /* Nothing. */
+#endif
+
+#if defined __cplusplus && defined __GNUC__ && ! defined __ICC && 6 <= __GNUC__
+# define YY_IGNORE_USELESS_CAST_BEGIN                          \
+    _Pragma ("GCC diagnostic push")                            \
+    _Pragma ("GCC diagnostic ignored \"-Wuseless-cast\"")
+# define YY_IGNORE_USELESS_CAST_END            \
+    _Pragma ("GCC diagnostic pop")
+#endif
+#ifndef YY_IGNORE_USELESS_CAST_BEGIN
+# define YY_IGNORE_USELESS_CAST_BEGIN
+# define YY_IGNORE_USELESS_CAST_END
+#endif
+
+
+#define YY_ASSERT(E) ((void) (0 && (E)))
+
+#if !defined yyoverflow
+
+/* The parser invokes alloca or malloc; define the necessary symbols.  */
+
+# ifdef YYSTACK_USE_ALLOCA
+#  if YYSTACK_USE_ALLOCA
+#   ifdef __GNUC__
+#    define YYSTACK_ALLOC __builtin_alloca
+#   elif defined __BUILTIN_VA_ARG_INCR
+#    include <alloca.h> /* INFRINGES ON USER NAME SPACE */
+#   elif defined _AIX
+#    define YYSTACK_ALLOC __alloca
+#   elif defined _MSC_VER
+#    include <malloc.h> /* INFRINGES ON USER NAME SPACE */
+#    define alloca _alloca
+#   else
+#    define YYSTACK_ALLOC alloca
+#    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS
+#     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+      /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
+#     ifndef EXIT_SUCCESS
+#      define EXIT_SUCCESS 0
+#     endif
+#    endif
+#   endif
+#  endif
+# endif
+
+# ifdef YYSTACK_ALLOC
+   /* Pacify GCC's 'empty if-body' warning.  */
+#  define YYSTACK_FREE(Ptr) do { /* empty */; } while (0)
+#  ifndef YYSTACK_ALLOC_MAXIMUM
+    /* The OS might guarantee only one guard page at the bottom of the stack,
+       and a page size can be as small as 4096 bytes.  So we cannot safely
+       invoke alloca (N) if N exceeds 4096.  Use a slightly smaller number
+       to allow for a few compiler-allocated temporary stack slots.  */
+#   define YYSTACK_ALLOC_MAXIMUM 4032 /* reasonable circa 2006 */
+#  endif
+# else
+#  define YYSTACK_ALLOC YYMALLOC
+#  define YYSTACK_FREE YYFREE
+#  ifndef YYSTACK_ALLOC_MAXIMUM
+#   define YYSTACK_ALLOC_MAXIMUM YYSIZE_MAXIMUM
+#  endif
+#  if (defined __cplusplus && ! defined EXIT_SUCCESS \
+       && ! ((defined YYMALLOC || defined malloc) \
+             && (defined YYFREE || defined free)))
+#   include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+#   ifndef EXIT_SUCCESS
+#    define EXIT_SUCCESS 0
+#   endif
+#  endif
+#  ifndef YYMALLOC
+#   define YYMALLOC malloc
+#   if ! defined malloc && ! defined EXIT_SUCCESS
+void *malloc (YYSIZE_T); /* INFRINGES ON USER NAME SPACE */
+#   endif
+#  endif
+#  ifndef YYFREE
+#   define YYFREE free
+#   if ! defined free && ! defined EXIT_SUCCESS
+void free (void *); /* INFRINGES ON USER NAME SPACE */
+#   endif
+#  endif
+# endif
+#endif /* !defined yyoverflow */
+
+#if (! defined yyoverflow \
+     && (! defined __cplusplus \
+         || (defined YYSTYPE_IS_TRIVIAL && YYSTYPE_IS_TRIVIAL)))
+
+/* A type that is properly aligned for any stack member.  */
+union yyalloc
+{
+  yy_state_t yyss_alloc;
+  YYSTYPE yyvs_alloc;
+};
+
+/* The size of the maximum gap between one aligned stack and the next.  */
+# define YYSTACK_GAP_MAXIMUM (YYSIZEOF (union yyalloc) - 1)
+
+/* The size of an array large to enough to hold all stacks, each with
+   N elements.  */
+# define YYSTACK_BYTES(N) \
+     ((N) * (YYSIZEOF (yy_state_t) + YYSIZEOF (YYSTYPE)) \
+      + YYSTACK_GAP_MAXIMUM)
+
+# define YYCOPY_NEEDED 1
+
+/* Relocate STACK from its old location to the new one.  The
+   local variables YYSIZE and YYSTACKSIZE give the old and new number of
+   elements in the stack, and YYPTR gives the new location of the
+   stack.  Advance YYPTR to a properly aligned location for the next
+   stack.  */
+# define YYSTACK_RELOCATE(Stack_alloc, Stack)                           \
+    do                                                                  \
+      {                                                                 \
+        YYPTRDIFF_T yynewbytes;                                         \
+        YYCOPY (&yyptr->Stack_alloc, Stack, yysize);                    \
+        Stack = &yyptr->Stack_alloc;                                    \
+        yynewbytes = yystacksize * YYSIZEOF (*Stack) + YYSTACK_GAP_MAXIMUM; \
+        yyptr += yynewbytes / YYSIZEOF (*yyptr);                        \
+      }                                                                 \
+    while (0)
+
+#endif
+
+#if defined YYCOPY_NEEDED && YYCOPY_NEEDED
+/* Copy COUNT objects from SRC to DST.  The source and destination do
+   not overlap.  */
+# ifndef YYCOPY
+#  if defined __GNUC__ && 1 < __GNUC__
+#   define YYCOPY(Dst, Src, Count) \
+      __builtin_memcpy (Dst, Src, YY_CAST (YYSIZE_T, (Count)) * sizeof (*(Src)))
+#  else
+#   define YYCOPY(Dst, Src, Count)              \
+      do                                        \
+        {                                       \
+          YYPTRDIFF_T yyi;                      \
+          for (yyi = 0; yyi < (Count); yyi++)   \
+            (Dst)[yyi] = (Src)[yyi];            \
+        }                                       \
+      while (0)
+#  endif
+# endif
+#endif /* !YYCOPY_NEEDED */
+
+/* YYFINAL -- State number of the termination state.  */
+#define YYFINAL  2
+/* YYLAST -- Last index in YYTABLE.  */
+#define YYLAST   50
+
+/* YYNTOKENS -- Number of terminals.  */
+#define YYNTOKENS  22
+/* YYNNTS -- Number of nonterminals.  */
+#define YYNNTS  11
+/* YYNRULES -- Number of rules.  */
+#define YYNRULES  51
+/* YYNSTATES -- Number of states.  */
+#define YYNSTATES  61
+
+/* YYMAXUTOK -- Last valid token kind.  */
+#define YYMAXUTOK   273
+
+
+/* YYTRANSLATE(TOKEN-NUM) -- Symbol number corresponding to TOKEN-NUM
+   as returned by yylex, with out-of-bounds checking.  */
+#define YYTRANSLATE(YYX)                                \
+  (0 <= (YYX) && (YYX) <= YYMAXUTOK                     \
+   ? YY_CAST (yysymbol_kind_t, yytranslate[YYX])        \
+   : YYSYMBOL_YYUNDEF)
+
+/* YYTRANSLATE[TOKEN-NUM] -- Symbol number corresponding to TOKEN-NUM
+   as returned by yylex.  */
+static const yytype_int8 yytranslate[] =
+{
+       0,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,    20,     2,     2,    21,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,    19,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     2,     2,     2,     2,
+       2,     2,     2,     2,     2,     2,     1,     2,     3,     4,
+       5,     6,     7,     8,     9,    10,    11,    12,    13,    14,
+      15,    16,    17,    18
+};
+
+#if YYDEBUG
+/* YYRLINE[YYN] -- Source line where rule number YYN was defined.  */
+static const yytype_int16 yyrline[] =
+{
+       0,   163,   163,   164,   167,   170,   173,   176,   179,   182,
+     185,   191,   197,   206,   212,   224,   227,   231,   236,   240,
+     244,   250,   254,   272,   278,   284,   288,   293,   297,   304,
+     312,   315,   318,   321,   324,   327,   330,   333,   336,   339,
+     342,   345,   348,   351,   354,   357,   360,   363,   366,   371,
+     405,   408
+};
+#endif
+
+/** Accessing symbol of state STATE.  */
+#define YY_ACCESSING_SYMBOL(State) YY_CAST (yysymbol_kind_t, yystos[State])
+
+#if YYDEBUG || 0
+/* The user-facing name of the symbol whose (internal) number is
+   YYSYMBOL.  No bounds checking.  */
+static const char *yysymbol_name (yysymbol_kind_t yysymbol) YY_ATTRIBUTE_UNUSED;
+
+/* YYTNAME[SYMBOL-NUM] -- String name of the symbol SYMBOL-NUM.
+   First, the terminals, then, starting at YYNTOKENS, nonterminals.  */
+static const char *const yytname[] =
+{
+  "\"end of file\"", "error", "\"invalid token\"", "tAGO", "tDAY",
+  "tDAY_UNIT", "tDAYZONE", "tDST", "tHOUR_UNIT", "tID", "tMERIDIAN",
+  "tMINUTE_UNIT", "tMONTH", "tMONTH_UNIT", "tSEC_UNIT", "tSNUMBER",
+  "tUNUMBER", "tYEAR_UNIT", "tZONE", "':'", "','", "'/'", "$accept",
+  "spec", "item", "time", "zone", "day", "date", "rel", "relunit",
+  "number", "o_merid", YY_NULLPTR
+};
+
+static const char *
+yysymbol_name (yysymbol_kind_t yysymbol)
+{
+  return yytname[yysymbol];
+}
+#endif
+
+#define YYPACT_NINF (-20)
+
+#define yypact_value_is_default(Yyn) \
+  ((Yyn) == YYPACT_NINF)
+
+#define YYTABLE_NINF (-1)
+
+#define yytable_value_is_error(Yyn) \
+  0
+
+/* YYPACT[STATE-NUM] -- Index in YYTABLE of the portion describing
+   STATE-NUM.  */
+static const yytype_int8 yypact[] =
+{
+     -20,     0,   -20,   -19,   -20,   -20,   -20,   -20,   -13,   -20,
+     -20,    30,    15,   -20,    14,   -20,   -20,   -20,   -20,   -20,
+     -20,    19,   -20,   -20,     4,   -20,   -20,   -20,   -20,   -20,
+     -20,   -20,   -20,   -20,   -20,   -20,    -6,   -20,   -20,    16,
+     -20,    17,    23,   -20,   -20,    24,   -20,   -20,   -20,    27,
+      28,   -20,   -20,   -20,    29,   -20,    32,    -8,   -20,   -20,
+     -20
+};
+
+/* YYDEFACT[STATE-NUM] -- Default reduction number in state STATE-NUM.
+   Performed when YYTABLE does not specify something else to do.  Zero
+   means the default is an error.  */
+static const yytype_int8 yydefact[] =
+{
+       2,     0,     1,    18,    39,    16,    42,    45,     0,    36,
+      48,     0,    49,    33,    15,     3,     4,     5,     7,     6,
+       8,    30,     9,    19,    25,    38,    41,    44,    35,    47,
+      32,    20,    37,    40,    10,    43,    27,    34,    46,     0,
+      31,     0,     0,    17,    29,     0,    24,    28,    23,    50,
+      21,    26,    51,    12,     0,    11,     0,    50,    22,    14,
+      13
+};
+
+/* YYPGOTO[NTERM-NUM].  */
+static const yytype_int8 yypgoto[] =
+{
+     -20,   -20,   -20,   -20,   -20,   -20,   -20,   -20,   -20,   -20,
+      -7
+};
+
+/* YYDEFGOTO[NTERM-NUM].  */
+static const yytype_int8 yydefgoto[] =
+{
+       0,     1,    15,    16,    17,    18,    19,    20,    21,    22,
+      55
+};
+
+/* YYTABLE[YYPACT[STATE-NUM]] -- What to do in state STATE-NUM.  If
+   positive, shift that token.  If negative, reduce the rule whose
+   number is the opposite.  If YYTABLE_NINF, syntax error.  */
+static const yytype_int8 yytable[] =
+{
+       2,    23,    52,    24,     3,     4,     5,    59,     6,    46,
+      47,     7,     8,     9,    10,    11,    12,    13,    14,    31,
+      32,    43,    44,    33,    45,    34,    35,    36,    37,    38,
+      39,    48,    40,    49,    41,    25,    42,    52,    26,    50,
+      51,    27,    53,    28,    29,    57,    54,    30,    58,    56,
+      60
+};
+
+static const yytype_int8 yycheck[] =
+{
+       0,    20,    10,    16,     4,     5,     6,    15,     8,    15,
+      16,    11,    12,    13,    14,    15,    16,    17,    18,     4,
+       5,     7,     3,     8,    20,    10,    11,    12,    13,    14,
+      15,    15,    17,    16,    19,     5,    21,    10,     8,    16,
+      16,    11,    15,    13,    14,    16,    19,    17,    16,    21,
+      57
+};
+
+/* YYSTOS[STATE-NUM] -- The symbol kind of the accessing symbol of
+   state STATE-NUM.  */
+static const yytype_int8 yystos[] =
+{
+       0,    23,     0,     4,     5,     6,     8,    11,    12,    13,
+      14,    15,    16,    17,    18,    24,    25,    26,    27,    28,
+      29,    30,    31,    20,    16,     5,     8,    11,    13,    14,
+      17,     4,     5,     8,    10,    11,    12,    13,    14,    15,
+      17,    19,    21,     7,     3,    20,    15,    16,    15,    16,
+      16,    16,    10,    15,    19,    32,    21,    16,    16,    15,
+      32
+};
+
+/* YYR1[RULE-NUM] -- Symbol kind of the left-hand side of rule RULE-NUM.  */
+static const yytype_int8 yyr1[] =
+{
+       0,    22,    23,    23,    24,    24,    24,    24,    24,    24,
+      25,    25,    25,    25,    25,    26,    26,    26,    27,    27,
+      27,    28,    28,    28,    28,    28,    28,    28,    28,    29,
+      29,    30,    30,    30,    30,    30,    30,    30,    30,    30,
+      30,    30,    30,    30,    30,    30,    30,    30,    30,    31,
+      32,    32
+};
+
+/* YYR2[RULE-NUM] -- Number of symbols on the right-hand side of rule RULE-NUM.  */
+static const yytype_int8 yyr2[] =
+{
+       0,     2,     0,     2,     1,     1,     1,     1,     1,     1,
+       2,     4,     4,     6,     6,     1,     1,     2,     1,     2,
+       2,     3,     5,     3,     3,     2,     4,     2,     3,     2,
+       1,     2,     2,     1,     2,     2,     1,     2,     2,     1,
+       2,     2,     1,     2,     2,     1,     2,     2,     1,     1,
+       0,     1
+};
+
+
+enum { YYENOMEM = -2 };
+
+#define yyerrok         (yyerrstatus = 0)
+#define yyclearin       (yychar = YYEMPTY)
+
+#define YYACCEPT        goto yyacceptlab
+#define YYABORT         goto yyabortlab
+#define YYERROR         goto yyerrorlab
+#define YYNOMEM         goto yyexhaustedlab
+
+
+#define YYRECOVERING()  (!!yyerrstatus)
+
+#define YYBACKUP(Token, Value)                                    \
+  do                                                              \
+    if (yychar == YYEMPTY)                                        \
+      {                                                           \
+        yychar = (Token);                                         \
+        yylval = (Value);                                         \
+        YYPOPSTACK (yylen);                                       \
+        yystate = *yyssp;                                         \
+        goto yybackup;                                            \
+      }                                                           \
+    else                                                          \
+      {                                                           \
+        yyerror (YY_("syntax error: cannot back up")); \
+        YYERROR;                                                  \
+      }                                                           \
+  while (0)
+
+/* Backward compatibility with an undocumented macro.
+   Use YYerror or YYUNDEF. */
+#define YYERRCODE YYUNDEF
+
+
+/* Enable debugging if requested.  */
+#if YYDEBUG
+
+# ifndef YYFPRINTF
+#  include <stdio.h> /* INFRINGES ON USER NAME SPACE */
+#  define YYFPRINTF fprintf
+# endif
+
+# define YYDPRINTF(Args)                        \
+do {                                            \
+  if (yydebug)                                  \
+    YYFPRINTF Args;                             \
+} while (0)
+
+
+
+
+# define YY_SYMBOL_PRINT(Title, Kind, Value, Location)                    \
+do {                                                                      \
+  if (yydebug)                                                            \
+    {                                                                     \
+      YYFPRINTF (stderr, "%s ", Title);                                   \
+      yy_symbol_print (stderr,                                            \
+                  Kind, Value); \
+      YYFPRINTF (stderr, "\n");                                           \
+    }                                                                     \
+} while (0)
+
+
+/*-----------------------------------.
+| Print this symbol's value on YYO.  |
+`-----------------------------------*/
+
+static void
+yy_symbol_value_print (FILE *yyo,
+                       yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep)
+{
+  FILE *yyoutput = yyo;
+  YY_USE (yyoutput);
+  if (!yyvaluep)
+    return;
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  YY_USE (yykind);
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+}
+
+
+/*---------------------------.
+| Print this symbol on YYO.  |
+`---------------------------*/
+
+static void
+yy_symbol_print (FILE *yyo,
+                 yysymbol_kind_t yykind, YYSTYPE const * const yyvaluep)
+{
+  YYFPRINTF (yyo, "%s %s (",
+             yykind < YYNTOKENS ? "token" : "nterm", yysymbol_name (yykind));
+
+  yy_symbol_value_print (yyo, yykind, yyvaluep);
+  YYFPRINTF (yyo, ")");
+}
+
+/*------------------------------------------------------------------.
+| yy_stack_print -- Print the state stack from its BOTTOM up to its |
+| TOP (included).                                                   |
+`------------------------------------------------------------------*/
+
+static void
+yy_stack_print (yy_state_t *yybottom, yy_state_t *yytop)
+{
+  YYFPRINTF (stderr, "Stack now");
+  for (; yybottom <= yytop; yybottom++)
+    {
+      int yybot = *yybottom;
+      YYFPRINTF (stderr, " %d", yybot);
+    }
+  YYFPRINTF (stderr, "\n");
+}
+
+# define YY_STACK_PRINT(Bottom, Top)                            \
+do {                                                            \
+  if (yydebug)                                                  \
+    yy_stack_print ((Bottom), (Top));                           \
+} while (0)
+
+
+/*------------------------------------------------.
+| Report that the YYRULE is going to be reduced.  |
+`------------------------------------------------*/
+
+static void
+yy_reduce_print (yy_state_t *yyssp, YYSTYPE *yyvsp,
+                 int yyrule)
+{
+  int yylno = yyrline[yyrule];
+  int yynrhs = yyr2[yyrule];
+  int yyi;
+  YYFPRINTF (stderr, "Reducing stack by rule %d (line %d):\n",
+             yyrule - 1, yylno);
+  /* The symbols being reduced.  */
+  for (yyi = 0; yyi < yynrhs; yyi++)
+    {
+      YYFPRINTF (stderr, "   $%d = ", yyi + 1);
+      yy_symbol_print (stderr,
+                       YY_ACCESSING_SYMBOL (+yyssp[yyi + 1 - yynrhs]),
+                       &yyvsp[(yyi + 1) - (yynrhs)]);
+      YYFPRINTF (stderr, "\n");
+    }
+}
+
+# define YY_REDUCE_PRINT(Rule)          \
+do {                                    \
+  if (yydebug)                          \
+    yy_reduce_print (yyssp, yyvsp, Rule); \
+} while (0)
+
+/* Nonzero means print parse trace.  It is left uninitialized so that
+   multiple parsers can coexist.  */
+int yydebug;
+#else /* !YYDEBUG */
+# define YYDPRINTF(Args) ((void) 0)
+# define YY_SYMBOL_PRINT(Title, Kind, Value, Location)
+# define YY_STACK_PRINT(Bottom, Top)
+# define YY_REDUCE_PRINT(Rule)
+#endif /* !YYDEBUG */
+
+
+/* YYINITDEPTH -- initial size of the parser's stacks.  */
+#ifndef YYINITDEPTH
+# define YYINITDEPTH 200
+#endif
+
+/* YYMAXDEPTH -- maximum size the stacks can grow to (effective only
+   if the built-in stack extension method is used).
+
+   Do not make this value too large; the results are undefined if
+   YYSTACK_ALLOC_MAXIMUM < YYSTACK_BYTES (YYMAXDEPTH)
+   evaluated with infinite-precision integer arithmetic.  */
+
+#ifndef YYMAXDEPTH
+# define YYMAXDEPTH 10000
+#endif
+
+
+
+
+
+
+/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+static void
+yydestruct (const char *yymsg,
+            yysymbol_kind_t yykind, YYSTYPE *yyvaluep)
+{
+  YY_USE (yyvaluep);
+  if (!yymsg)
+    yymsg = "Deleting";
+  YY_SYMBOL_PRINT (yymsg, yykind, yyvaluep, yylocationp);
+
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  YY_USE (yykind);
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+}
+
+
+/* Lookahead token kind.  */
+int yychar;
+
+/* The semantic value of the lookahead symbol.  */
+YYSTYPE yylval;
+/* Number of syntax errors so far.  */
+int yynerrs;
+
+
+
+
+/*----------.
+| yyparse.  |
+`----------*/
+
+int
+yyparse (void)
+{
+    yy_state_fast_t yystate = 0;
+    /* Number of tokens to shift before error messages enabled.  */
+    int yyerrstatus = 0;
+
+    /* Refer to the stacks through separate pointers, to allow yyoverflow
+       to reallocate them elsewhere.  */
+
+    /* Their size.  */
+    YYPTRDIFF_T yystacksize = YYINITDEPTH;
+
+    /* The state stack: array, bottom, top.  */
+    yy_state_t yyssa[YYINITDEPTH];
+    yy_state_t *yyss = yyssa;
+    yy_state_t *yyssp = yyss;
+
+    /* The semantic value stack: array, bottom, top.  */
+    YYSTYPE yyvsa[YYINITDEPTH];
+    YYSTYPE *yyvs = yyvsa;
+    YYSTYPE *yyvsp = yyvs;
+
+  int yyn;
+  /* The return value of yyparse.  */
+  int yyresult;
+  /* Lookahead symbol kind.  */
+  yysymbol_kind_t yytoken = YYSYMBOL_YYEMPTY;
+  /* The variables used to return semantic value and location from the
+     action routines.  */
+  YYSTYPE yyval;
+
+
+
+#define YYPOPSTACK(N)   (yyvsp -= (N), yyssp -= (N))
+
+  /* The number of symbols on the RHS of the reduced rule.
+     Keep to zero when no symbol should be popped.  */
+  int yylen = 0;
+
+  YYDPRINTF ((stderr, "Starting parse\n"));
+
+  yychar = YYEMPTY; /* Cause a token to be read.  */
+
+  goto yysetstate;
+
+
+/*------------------------------------------------------------.
+| yynewstate -- push a new state, which is found in yystate.  |
+`------------------------------------------------------------*/
+yynewstate:
+  /* In all cases, when you get here, the value and location stacks
+     have just been pushed.  So pushing a state here evens the stacks.  */
+  yyssp++;
+
+
+/*--------------------------------------------------------------------.
+| yysetstate -- set current state (the top of the stack) to yystate.  |
+`--------------------------------------------------------------------*/
+yysetstate:
+  YYDPRINTF ((stderr, "Entering state %d\n", yystate));
+  YY_ASSERT (0 <= yystate && yystate < YYNSTATES);
+  YY_IGNORE_USELESS_CAST_BEGIN
+  *yyssp = YY_CAST (yy_state_t, yystate);
+  YY_IGNORE_USELESS_CAST_END
+  YY_STACK_PRINT (yyss, yyssp);
+
+  if (yyss + yystacksize - 1 <= yyssp)
+#if !defined yyoverflow && !defined YYSTACK_RELOCATE
+    YYNOMEM;
+#else
+    {
+      /* Get the current used size of the three stacks, in elements.  */
+      YYPTRDIFF_T yysize = yyssp - yyss + 1;
+
+# if defined yyoverflow
+      {
+        /* Give user a chance to reallocate the stack.  Use copies of
+           these so that the &'s don't force the real ones into
+           memory.  */
+        yy_state_t *yyss1 = yyss;
+        YYSTYPE *yyvs1 = yyvs;
+
+        /* Each stack pointer address is followed by the size of the
+           data in use in that stack, in bytes.  This used to be a
+           conditional around just the two extra args, but that might
+           be undefined if yyoverflow is a macro.  */
+        yyoverflow (YY_("memory exhausted"),
+                    &yyss1, yysize * YYSIZEOF (*yyssp),
+                    &yyvs1, yysize * YYSIZEOF (*yyvsp),
+                    &yystacksize);
+        yyss = yyss1;
+        yyvs = yyvs1;
+      }
+# else /* defined YYSTACK_RELOCATE */
+      /* Extend the stack our own way.  */
+      if (YYMAXDEPTH <= yystacksize)
+        YYNOMEM;
+      yystacksize *= 2;
+      if (YYMAXDEPTH < yystacksize)
+        yystacksize = YYMAXDEPTH;
+
+      {
+        yy_state_t *yyss1 = yyss;
+        union yyalloc *yyptr =
+          YY_CAST (union yyalloc *,
+                   YYSTACK_ALLOC (YY_CAST (YYSIZE_T, YYSTACK_BYTES (yystacksize))));
+        if (! yyptr)
+          YYNOMEM;
+        YYSTACK_RELOCATE (yyss_alloc, yyss);
+        YYSTACK_RELOCATE (yyvs_alloc, yyvs);
+#  undef YYSTACK_RELOCATE
+        if (yyss1 != yyssa)
+          YYSTACK_FREE (yyss1);
+      }
+# endif
+
+      yyssp = yyss + yysize - 1;
+      yyvsp = yyvs + yysize - 1;
+
+      YY_IGNORE_USELESS_CAST_BEGIN
+      YYDPRINTF ((stderr, "Stack size increased to %ld\n",
+                  YY_CAST (long, yystacksize)));
+      YY_IGNORE_USELESS_CAST_END
+
+      if (yyss + yystacksize - 1 <= yyssp)
+        YYABORT;
+    }
+#endif /* !defined yyoverflow && !defined YYSTACK_RELOCATE */
+
+
+  if (yystate == YYFINAL)
+    YYACCEPT;
+
+  goto yybackup;
+
+
+/*-----------.
+| yybackup.  |
+`-----------*/
+yybackup:
+  /* Do appropriate processing given the current state.  Read a
+     lookahead token if we need one and don't already have one.  */
+
+  /* First try to decide what to do without reference to lookahead token.  */
+  yyn = yypact[yystate];
+  if (yypact_value_is_default (yyn))
+    goto yydefault;
+
+  /* Not known => get a lookahead token if don't already have one.  */
+
+  /* YYCHAR is either empty, or end-of-input, or a valid lookahead.  */
+  if (yychar == YYEMPTY)
+    {
+      YYDPRINTF ((stderr, "Reading a token\n"));
+      yychar = yylex ();
+    }
+
+  if (yychar <= YYEOF)
+    {
+      yychar = YYEOF;
+      yytoken = YYSYMBOL_YYEOF;
+      YYDPRINTF ((stderr, "Now at end of input.\n"));
+    }
+  else if (yychar == YYerror)
+    {
+      /* The scanner already issued an error message, process directly
+         to error recovery.  But do not keep the error token as
+         lookahead, it is too special and may lead us to an endless
+         loop in error recovery. */
+      yychar = YYUNDEF;
+      yytoken = YYSYMBOL_YYerror;
+      goto yyerrlab1;
+    }
+  else
+    {
+      yytoken = YYTRANSLATE (yychar);
+      YY_SYMBOL_PRINT ("Next token is", yytoken, &yylval, &yylloc);
+    }
+
+  /* If the proper action on seeing token YYTOKEN is to reduce or to
+     detect an error, take that action.  */
+  yyn += yytoken;
+  if (yyn < 0 || YYLAST < yyn || yycheck[yyn] != yytoken)
+    goto yydefault;
+  yyn = yytable[yyn];
+  if (yyn <= 0)
+    {
+      if (yytable_value_is_error (yyn))
+        goto yyerrlab;
+      yyn = -yyn;
+      goto yyreduce;
+    }
+
+  /* Count tokens shifted since error; after three, turn off error
+     status.  */
+  if (yyerrstatus)
+    yyerrstatus--;
+
+  /* Shift the lookahead token.  */
+  YY_SYMBOL_PRINT ("Shifting", yytoken, &yylval, &yylloc);
+  yystate = yyn;
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+
+  /* Discard the shifted token.  */
+  yychar = YYEMPTY;
+  goto yynewstate;
+
+
+/*-----------------------------------------------------------.
+| yydefault -- do the default action for the current state.  |
+`-----------------------------------------------------------*/
+yydefault:
+  yyn = yydefact[yystate];
+  if (yyn == 0)
+    goto yyerrlab;
+  goto yyreduce;
+
+
+/*-----------------------------.
+| yyreduce -- do a reduction.  |
+`-----------------------------*/
+yyreduce:
+  /* yyn is the number of a rule to reduce with.  */
+  yylen = yyr2[yyn];
+
+  /* If YYLEN is nonzero, implement the default value of the action:
+     '$$ = $1'.
+
+     Otherwise, the following line sets YYVAL to garbage.
+     This behavior is undocumented and Bison
+     users should not rely upon it.  Assigning to YYVAL
+     unconditionally makes the parser a bit smaller, and it avoids a
+     GCC warning that YYVAL may be used uninitialized.  */
+  yyval = yyvsp[1-yylen];
+
+
+  YY_REDUCE_PRINT (yyn);
+  switch (yyn)
+    {
+  case 4: /* item: time  */
+#line 167 "getdate.y"
+               {
+	    yyHaveTime++;
+	}
+#line 1358 "getdate.c"
+    break;
+
+  case 5: /* item: zone  */
+#line 170 "getdate.y"
+               {
+	    yyHaveZone++;
+	}
+#line 1366 "getdate.c"
+    break;
+
+  case 6: /* item: date  */
+#line 173 "getdate.y"
+               {
+	    yyHaveDate++;
+	}
+#line 1374 "getdate.c"
+    break;
+
+  case 7: /* item: day  */
+#line 176 "getdate.y"
+              {
+	    yyHaveDay++;
+	}
+#line 1382 "getdate.c"
+    break;
+
+  case 8: /* item: rel  */
+#line 179 "getdate.y"
+              {
+	    yyHaveRel++;
+	}
+#line 1390 "getdate.c"
+    break;
+
+  case 10: /* time: tUNUMBER tMERIDIAN  */
+#line 185 "getdate.y"
+                             {
+	    yyHour = (yyvsp[-1].Number);
+	    yyMinutes = 0;
+	    yySeconds = 0;
+	    yyMeridian = (yyvsp[0].Meridian);
+	}
+#line 1401 "getdate.c"
+    break;
+
+  case 11: /* time: tUNUMBER ':' tUNUMBER o_merid  */
+#line 191 "getdate.y"
+                                        {
+	    yyHour = (yyvsp[-3].Number);
+	    yyMinutes = (yyvsp[-1].Number);
+	    yySeconds = 0;
+	    yyMeridian = (yyvsp[0].Meridian);
+	}
+#line 1412 "getdate.c"
+    break;
+
+  case 12: /* time: tUNUMBER ':' tUNUMBER tSNUMBER  */
+#line 197 "getdate.y"
+                                         {
+	    yyHour = (yyvsp[-3].Number);
+	    yyMinutes = (yyvsp[-1].Number);
+	    yyMeridian = MER24;
+	    yyHaveZone++;
+	    yyTimezone = ((yyvsp[0].Number) < 0
+			  ? -(yyvsp[0].Number) % 100 + (-(yyvsp[0].Number) / 100) * 60
+			  : - ((yyvsp[0].Number) % 100 + ((yyvsp[0].Number) / 100) * 60));
+	}
+#line 1426 "getdate.c"
+    break;
+
+  case 13: /* time: tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid  */
+#line 206 "getdate.y"
+                                                     {
+	    yyHour = (yyvsp[-5].Number);
+	    yyMinutes = (yyvsp[-3].Number);
+	    yySeconds = (yyvsp[-1].Number);
+	    yyMeridian = (yyvsp[0].Meridian);
+	}
+#line 1437 "getdate.c"
+    break;
+
+  case 14: /* time: tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER  */
+#line 212 "getdate.y"
+                                                      {
+	    yyHour = (yyvsp[-5].Number);
+	    yyMinutes = (yyvsp[-3].Number);
+	    yySeconds = (yyvsp[-1].Number);
+	    yyMeridian = MER24;
+	    yyHaveZone++;
+	    yyTimezone = ((yyvsp[0].Number) < 0
+			  ? -(yyvsp[0].Number) % 100 + (-(yyvsp[0].Number) / 100) * 60
+			  : - ((yyvsp[0].Number) % 100 + ((yyvsp[0].Number) / 100) * 60));
+	}
+#line 1452 "getdate.c"
+    break;
+
+  case 15: /* zone: tZONE  */
+#line 224 "getdate.y"
+                {
+	    yyTimezone = (yyvsp[0].Number);
+	}
+#line 1460 "getdate.c"
+    break;
+
+  case 16: /* zone: tDAYZONE  */
+#line 227 "getdate.y"
+                   {
+	    yyTimezone = (yyvsp[0].Number) - 60;
+	}
+#line 1468 "getdate.c"
+    break;
+
+  case 17: /* zone: tZONE tDST  */
+#line 231 "getdate.y"
+                     {
+	    yyTimezone = (yyvsp[-1].Number) - 60;
+	}
+#line 1476 "getdate.c"
+    break;
+
+  case 18: /* day: tDAY  */
+#line 236 "getdate.y"
+               {
+	    yyDayOrdinal = 1;
+	    yyDayNumber = (yyvsp[0].Number);
+	}
+#line 1485 "getdate.c"
+    break;
+
+  case 19: /* day: tDAY ','  */
+#line 240 "getdate.y"
+                   {
+	    yyDayOrdinal = 1;
+	    yyDayNumber = (yyvsp[-1].Number);
+	}
+#line 1494 "getdate.c"
+    break;
+
+  case 20: /* day: tUNUMBER tDAY  */
+#line 244 "getdate.y"
+                        {
+	    yyDayOrdinal = (yyvsp[-1].Number);
+	    yyDayNumber = (yyvsp[0].Number);
+	}
+#line 1503 "getdate.c"
+    break;
+
+  case 21: /* date: tUNUMBER '/' tUNUMBER  */
+#line 250 "getdate.y"
+                                {
+	    yyMonth = (yyvsp[-2].Number);
+	    yyDay = (yyvsp[0].Number);
+	}
+#line 1512 "getdate.c"
+    break;
+
+  case 22: /* date: tUNUMBER '/' tUNUMBER '/' tUNUMBER  */
+#line 254 "getdate.y"
+                                             {
+	  /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY.
+	     The goal in recognizing YYYY/MM/DD is solely to support legacy
+	     machine-generated dates like those in an RCS log listing.  If
+	     you want portability, use the ISO 8601 format.  */
+	  if ((yyvsp[-4].Number) >= 1000)
+	    {
+	      yyYear = (yyvsp[-4].Number);
+	      yyMonth = (yyvsp[-2].Number);
+	      yyDay = (yyvsp[0].Number);
+	    }
+	  else
+	    {
+	      yyMonth = (yyvsp[-4].Number);
+	      yyDay = (yyvsp[-2].Number);
+	      yyYear = (yyvsp[0].Number);
+	    }
+	}
+#line 1535 "getdate.c"
+    break;
+
+  case 23: /* date: tUNUMBER tSNUMBER tSNUMBER  */
+#line 272 "getdate.y"
+                                     {
+	    /* ISO 8601 format.  yyyy-mm-dd.  */
+	    yyYear = (yyvsp[-2].Number);
+	    yyMonth = -(yyvsp[-1].Number);
+	    yyDay = -(yyvsp[0].Number);
+	}
+#line 1546 "getdate.c"
+    break;
+
+  case 24: /* date: tUNUMBER tMONTH tSNUMBER  */
+#line 278 "getdate.y"
+                                   {
+	    /* e.g. 17-JUN-1992.  */
+	    yyDay = (yyvsp[-2].Number);
+	    yyMonth = (yyvsp[-1].Number);
+	    yyYear = -(yyvsp[0].Number);
+	}
+#line 1557 "getdate.c"
+    break;
+
+  case 25: /* date: tMONTH tUNUMBER  */
+#line 284 "getdate.y"
+                          {
+	    yyMonth = (yyvsp[-1].Number);
+	    yyDay = (yyvsp[0].Number);
+	}
+#line 1566 "getdate.c"
+    break;
+
+  case 26: /* date: tMONTH tUNUMBER ',' tUNUMBER  */
+#line 288 "getdate.y"
+                                       {
+	    yyMonth = (yyvsp[-3].Number);
+	    yyDay = (yyvsp[-2].Number);
+	    yyYear = (yyvsp[0].Number);
+	}
+#line 1576 "getdate.c"
+    break;
+
+  case 27: /* date: tUNUMBER tMONTH  */
+#line 293 "getdate.y"
+                          {
+	    yyMonth = (yyvsp[0].Number);
+	    yyDay = (yyvsp[-1].Number);
+	}
+#line 1585 "getdate.c"
+    break;
+
+  case 28: /* date: tUNUMBER tMONTH tUNUMBER  */
+#line 297 "getdate.y"
+                                   {
+	    yyMonth = (yyvsp[-1].Number);
+	    yyDay = (yyvsp[-2].Number);
+	    yyYear = (yyvsp[0].Number);
+	}
+#line 1595 "getdate.c"
+    break;
+
+  case 29: /* rel: relunit tAGO  */
+#line 304 "getdate.y"
+                       {
+	    yyRelSeconds = -yyRelSeconds;
+	    yyRelMinutes = -yyRelMinutes;
+	    yyRelHour = -yyRelHour;
+	    yyRelDay = -yyRelDay;
+	    yyRelMonth = -yyRelMonth;
+	    yyRelYear = -yyRelYear;
+	}
+#line 1608 "getdate.c"
+    break;
+
+  case 31: /* relunit: tUNUMBER tYEAR_UNIT  */
+#line 315 "getdate.y"
+                              {
+	    yyRelYear += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1616 "getdate.c"
+    break;
+
+  case 32: /* relunit: tSNUMBER tYEAR_UNIT  */
+#line 318 "getdate.y"
+                              {
+	    yyRelYear += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1624 "getdate.c"
+    break;
+
+  case 33: /* relunit: tYEAR_UNIT  */
+#line 321 "getdate.y"
+                     {
+	    yyRelYear += (yyvsp[0].Number);
+	}
+#line 1632 "getdate.c"
+    break;
+
+  case 34: /* relunit: tUNUMBER tMONTH_UNIT  */
+#line 324 "getdate.y"
+                               {
+	    yyRelMonth += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1640 "getdate.c"
+    break;
+
+  case 35: /* relunit: tSNUMBER tMONTH_UNIT  */
+#line 327 "getdate.y"
+                               {
+	    yyRelMonth += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1648 "getdate.c"
+    break;
+
+  case 36: /* relunit: tMONTH_UNIT  */
+#line 330 "getdate.y"
+                      {
+	    yyRelMonth += (yyvsp[0].Number);
+	}
+#line 1656 "getdate.c"
+    break;
+
+  case 37: /* relunit: tUNUMBER tDAY_UNIT  */
+#line 333 "getdate.y"
+                             {
+	    yyRelDay += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1664 "getdate.c"
+    break;
+
+  case 38: /* relunit: tSNUMBER tDAY_UNIT  */
+#line 336 "getdate.y"
+                             {
+	    yyRelDay += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1672 "getdate.c"
+    break;
+
+  case 39: /* relunit: tDAY_UNIT  */
+#line 339 "getdate.y"
+                    {
+	    yyRelDay += (yyvsp[0].Number);
+	}
+#line 1680 "getdate.c"
+    break;
+
+  case 40: /* relunit: tUNUMBER tHOUR_UNIT  */
+#line 342 "getdate.y"
+                              {
+	    yyRelHour += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1688 "getdate.c"
+    break;
+
+  case 41: /* relunit: tSNUMBER tHOUR_UNIT  */
+#line 345 "getdate.y"
+                              {
+	    yyRelHour += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1696 "getdate.c"
+    break;
+
+  case 42: /* relunit: tHOUR_UNIT  */
+#line 348 "getdate.y"
+                     {
+	    yyRelHour += (yyvsp[0].Number);
+	}
+#line 1704 "getdate.c"
+    break;
+
+  case 43: /* relunit: tUNUMBER tMINUTE_UNIT  */
+#line 351 "getdate.y"
+                                {
+	    yyRelMinutes += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1712 "getdate.c"
+    break;
+
+  case 44: /* relunit: tSNUMBER tMINUTE_UNIT  */
+#line 354 "getdate.y"
+                                {
+	    yyRelMinutes += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1720 "getdate.c"
+    break;
+
+  case 45: /* relunit: tMINUTE_UNIT  */
+#line 357 "getdate.y"
+                       {
+	    yyRelMinutes += (yyvsp[0].Number);
+	}
+#line 1728 "getdate.c"
+    break;
+
+  case 46: /* relunit: tUNUMBER tSEC_UNIT  */
+#line 360 "getdate.y"
+                             {
+	    yyRelSeconds += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1736 "getdate.c"
+    break;
+
+  case 47: /* relunit: tSNUMBER tSEC_UNIT  */
+#line 363 "getdate.y"
+                             {
+	    yyRelSeconds += (yyvsp[-1].Number) * (yyvsp[0].Number);
+	}
+#line 1744 "getdate.c"
+    break;
+
+  case 48: /* relunit: tSEC_UNIT  */
+#line 366 "getdate.y"
+                    {
+	    yyRelSeconds += (yyvsp[0].Number);
+	}
+#line 1752 "getdate.c"
+    break;
+
+  case 49: /* number: tUNUMBER  */
+#line 372 "getdate.y"
+          {
+	    if ((yyHaveTime != 0) && (yyHaveDate != 0) && (yyHaveRel == 0))
+	      yyYear = (yyvsp[0].Number);
+	    else
+	      {
+		if ((yyvsp[0].Number)>10000)
+		  {
+		    yyHaveDate++;
+		    yyDay= ((yyvsp[0].Number))%100;
+		    yyMonth= ((yyvsp[0].Number)/100)%100;
+		    yyYear = (yyvsp[0].Number)/10000;
+		  }
+		else
+		  {
+		    yyHaveTime++;
+		    if ((yyvsp[0].Number) < 100)
+		      {
+			yyHour = (yyvsp[0].Number);
+			yyMinutes = 0;
+		      }
+		    else
+		      {
+		    	yyHour = (yyvsp[0].Number) / 100;
+		    	yyMinutes = (yyvsp[0].Number) % 100;
+		      }
+		    yySeconds = 0;
+		    yyMeridian = MER24;
+		  }
+	      }
+	  }
+#line 1787 "getdate.c"
+    break;
+
+  case 50: /* o_merid: %empty  */
+#line 405 "getdate.y"
+          {
+	    (yyval.Meridian) = MER24;
+	  }
+#line 1795 "getdate.c"
+    break;
+
+  case 51: /* o_merid: tMERIDIAN  */
+#line 409 "getdate.y"
+          {
+	    (yyval.Meridian) = (yyvsp[0].Meridian);
+	  }
+#line 1803 "getdate.c"
+    break;
+
+
+#line 1807 "getdate.c"
+
+      default: break;
+    }
+  /* User semantic actions sometimes alter yychar, and that requires
+     that yytoken be updated with the new translation.  We take the
+     approach of translating immediately before every use of yytoken.
+     One alternative is translating here after every semantic action,
+     but that translation would be missed if the semantic action invokes
+     YYABORT, YYACCEPT, or YYERROR immediately after altering yychar or
+     if it invokes YYBACKUP.  In the case of YYABORT or YYACCEPT, an
+     incorrect destructor might then be invoked immediately.  In the
+     case of YYERROR or YYBACKUP, subsequent parser actions might lead
+     to an incorrect destructor call or verbose syntax error message
+     before the lookahead is translated.  */
+  YY_SYMBOL_PRINT ("-> $$ =", YY_CAST (yysymbol_kind_t, yyr1[yyn]), &yyval, &yyloc);
+
+  YYPOPSTACK (yylen);
+  yylen = 0;
+
+  *++yyvsp = yyval;
+
+  /* Now 'shift' the result of the reduction.  Determine what state
+     that goes to, based on the state we popped back to and the rule
+     number reduced by.  */
+  {
+    const int yylhs = yyr1[yyn] - YYNTOKENS;
+    const int yyi = yypgoto[yylhs] + *yyssp;
+    yystate = (0 <= yyi && yyi <= YYLAST && yycheck[yyi] == *yyssp
+               ? yytable[yyi]
+               : yydefgoto[yylhs]);
+  }
+
+  goto yynewstate;
+
+
+/*--------------------------------------.
+| yyerrlab -- here on detecting error.  |
+`--------------------------------------*/
+yyerrlab:
+  /* Make sure we have latest lookahead translation.  See comments at
+     user semantic actions for why this is necessary.  */
+  yytoken = yychar == YYEMPTY ? YYSYMBOL_YYEMPTY : YYTRANSLATE (yychar);
+  /* If not already recovering from an error, report this error.  */
+  if (!yyerrstatus)
+    {
+      ++yynerrs;
+      yyerror (YY_("syntax error"));
+    }
+
+  if (yyerrstatus == 3)
+    {
+      /* If just tried and failed to reuse lookahead token after an
+         error, discard it.  */
+
+      if (yychar <= YYEOF)
+        {
+          /* Return failure if at end of input.  */
+          if (yychar == YYEOF)
+            YYABORT;
+        }
+      else
+        {
+          yydestruct ("Error: discarding",
+                      yytoken, &yylval);
+          yychar = YYEMPTY;
+        }
+    }
+
+  /* Else will try to reuse lookahead token after shifting the error
+     token.  */
+  goto yyerrlab1;
+
+
+/*---------------------------------------------------.
+| yyerrorlab -- error raised explicitly by YYERROR.  |
+`---------------------------------------------------*/
+yyerrorlab:
+  /* Pacify compilers when the user code never invokes YYERROR and the
+     label yyerrorlab therefore never appears in user code.  */
+  if (0)
+    YYERROR;
+  ++yynerrs;
+
+  /* Do not reclaim the symbols of the rule whose action triggered
+     this YYERROR.  */
+  YYPOPSTACK (yylen);
+  yylen = 0;
+  YY_STACK_PRINT (yyss, yyssp);
+  yystate = *yyssp;
+  goto yyerrlab1;
+
+
+/*-------------------------------------------------------------.
+| yyerrlab1 -- common code for both syntax error and YYERROR.  |
+`-------------------------------------------------------------*/
+yyerrlab1:
+  yyerrstatus = 3;      /* Each real token shifted decrements this.  */
+
+  /* Pop stack until we find a state that shifts the error token.  */
+  for (;;)
+    {
+      yyn = yypact[yystate];
+      if (!yypact_value_is_default (yyn))
+        {
+          yyn += YYSYMBOL_YYerror;
+          if (0 <= yyn && yyn <= YYLAST && yycheck[yyn] == YYSYMBOL_YYerror)
+            {
+              yyn = yytable[yyn];
+              if (0 < yyn)
+                break;
+            }
+        }
+
+      /* Pop the current state because it cannot handle the error token.  */
+      if (yyssp == yyss)
+        YYABORT;
+
+
+      yydestruct ("Error: popping",
+                  YY_ACCESSING_SYMBOL (yystate), yyvsp);
+      YYPOPSTACK (1);
+      yystate = *yyssp;
+      YY_STACK_PRINT (yyss, yyssp);
+    }
+
+  YY_IGNORE_MAYBE_UNINITIALIZED_BEGIN
+  *++yyvsp = yylval;
+  YY_IGNORE_MAYBE_UNINITIALIZED_END
+
+
+  /* Shift the error token.  */
+  YY_SYMBOL_PRINT ("Shifting", YY_ACCESSING_SYMBOL (yyn), yyvsp, yylsp);
+
+  yystate = yyn;
+  goto yynewstate;
+
+
+/*-------------------------------------.
+| yyacceptlab -- YYACCEPT comes here.  |
+`-------------------------------------*/
+yyacceptlab:
+  yyresult = 0;
+  goto yyreturnlab;
+
+
+/*-----------------------------------.
+| yyabortlab -- YYABORT comes here.  |
+`-----------------------------------*/
+yyabortlab:
+  yyresult = 1;
+  goto yyreturnlab;
+
+
+/*-----------------------------------------------------------.
+| yyexhaustedlab -- YYNOMEM (memory exhaustion) comes here.  |
+`-----------------------------------------------------------*/
+yyexhaustedlab:
+  yyerror (YY_("memory exhausted"));
+  yyresult = 2;
+  goto yyreturnlab;
+
+
+/*----------------------------------------------------------.
+| yyreturnlab -- parsing is finished, clean up and return.  |
+`----------------------------------------------------------*/
+yyreturnlab:
+  if (yychar != YYEMPTY)
+    {
+      /* Make sure we have latest lookahead translation.  See comments at
+         user semantic actions for why this is necessary.  */
+      yytoken = YYTRANSLATE (yychar);
+      yydestruct ("Cleanup: discarding lookahead",
+                  yytoken, &yylval);
+    }
+  /* Do not reclaim the symbols of the rule whose action triggered
+     this YYABORT or YYACCEPT.  */
+  YYPOPSTACK (yylen);
+  YY_STACK_PRINT (yyss, yyssp);
+  while (yyssp != yyss)
+    {
+      yydestruct ("Cleanup: popping",
+                  YY_ACCESSING_SYMBOL (+*yyssp), yyvsp);
+      YYPOPSTACK (1);
+    }
+#ifndef yyoverflow
+  if (yyss != yyssa)
+    YYSTACK_FREE (yyss);
+#endif
+
+  return yyresult;
+}
+
+#line 414 "getdate.y"
+
+
+/* Month and day table. */
+static TABLE const MonthDayTable[] = {
+    { "january",	tMONTH,  1 },
+    { "february",	tMONTH,  2 },
+    { "march",		tMONTH,  3 },
+    { "april",		tMONTH,  4 },
+    { "may",		tMONTH,  5 },
+    { "june",		tMONTH,  6 },
+    { "july",		tMONTH,  7 },
+    { "august",		tMONTH,  8 },
+    { "september",	tMONTH,  9 },
+    { "sept",		tMONTH,  9 },
+    { "october",	tMONTH, 10 },
+    { "november",	tMONTH, 11 },
+    { "december",	tMONTH, 12 },
+    { "sunday",		tDAY, 0 },
+    { "monday",		tDAY, 1 },
+    { "tuesday",	tDAY, 2 },
+    { "tues",		tDAY, 2 },
+    { "wednesday",	tDAY, 3 },
+    { "wednes",		tDAY, 3 },
+    { "thursday",	tDAY, 4 },
+    { "thur",		tDAY, 4 },
+    { "thurs",		tDAY, 4 },
+    { "friday",		tDAY, 5 },
+    { "saturday",	tDAY, 6 },
+    { NULL, 0, 0 }
+};
+
+/* Time units table. */
+static TABLE const UnitsTable[] = {
+    { "year",		tYEAR_UNIT,	1 },
+    { "month",		tMONTH_UNIT,	1 },
+    { "fortnight",	tDAY_UNIT,	14 },
+    { "week",		tDAY_UNIT,	7 },
+    { "day",		tDAY_UNIT,	1 },
+    { "hour",		tHOUR_UNIT,	1 },
+    { "minute",		tMINUTE_UNIT,	1 },
+    { "min",		tMINUTE_UNIT,	1 },
+    { "second",		tSEC_UNIT,	1 },
+    { "sec",		tSEC_UNIT,	1 },
+    { NULL, 0, 0 }
+};
+
+/* Assorted relative-time words. */
+static TABLE const OtherTable[] = {
+    { "tomorrow",	tMINUTE_UNIT,	1 * 24 * 60 },
+    { "yesterday",	tMINUTE_UNIT,	-1 * 24 * 60 },
+    { "today",		tMINUTE_UNIT,	0 },
+    { "now",		tMINUTE_UNIT,	0 },
+    { "last",		tUNUMBER,	-1 },
+    { "this",		tMINUTE_UNIT,	0 },
+    { "next",		tUNUMBER,	2 },
+    { "first",		tUNUMBER,	1 },
+/*  { "second",		tUNUMBER,	2 }, */
+    { "third",		tUNUMBER,	3 },
+    { "fourth",		tUNUMBER,	4 },
+    { "fifth",		tUNUMBER,	5 },
+    { "sixth",		tUNUMBER,	6 },
+    { "seventh",	tUNUMBER,	7 },
+    { "eighth",		tUNUMBER,	8 },
+    { "ninth",		tUNUMBER,	9 },
+    { "tenth",		tUNUMBER,	10 },
+    { "eleventh",	tUNUMBER,	11 },
+    { "twelfth",	tUNUMBER,	12 },
+    { "ago",		tAGO,	1 },
+    { NULL, 0, 0 }
+};
+
+/* The timezone table. */
+static TABLE const TimezoneTable[] = {
+    { "gmt",	tZONE,     HOUR ( 0) },	/* Greenwich Mean */
+    { "ut",	tZONE,     HOUR ( 0) },	/* Universal (Coordinated) */
+    { "utc",	tZONE,     HOUR ( 0) },
+    { "wet",	tZONE,     HOUR ( 0) },	/* Western European */
+    { "bst",	tDAYZONE,  HOUR ( 0) },	/* British Summer */
+    { "wat",	tZONE,     HOUR ( 1) },	/* West Africa */
+    { "at",	tZONE,     HOUR ( 2) },	/* Azores */
+    { "ast",	tZONE,     HOUR ( 4) },	/* Atlantic Standard */
+    { "adt",	tDAYZONE,  HOUR ( 4) },	/* Atlantic Daylight */
+    { "est",	tZONE,     HOUR ( 5) },	/* Eastern Standard */
+    { "edt",	tDAYZONE,  HOUR ( 5) },	/* Eastern Daylight */
+    { "cst",	tZONE,     HOUR ( 6) },	/* Central Standard */
+    { "cdt",	tDAYZONE,  HOUR ( 6) },	/* Central Daylight */
+    { "mst",	tZONE,     HOUR ( 7) },	/* Mountain Standard */
+    { "mdt",	tDAYZONE,  HOUR ( 7) },	/* Mountain Daylight */
+    { "pst",	tZONE,     HOUR ( 8) },	/* Pacific Standard */
+    { "pdt",	tDAYZONE,  HOUR ( 8) },	/* Pacific Daylight */
+    { "yst",	tZONE,     HOUR ( 9) },	/* Yukon Standard */
+    { "ydt",	tDAYZONE,  HOUR ( 9) },	/* Yukon Daylight */
+    { "hst",	tZONE,     HOUR (10) },	/* Hawaii Standard */
+    { "hdt",	tDAYZONE,  HOUR (10) },	/* Hawaii Daylight */
+    { "cat",	tZONE,     HOUR (10) },	/* Central Alaska */
+    { "ahst",	tZONE,     HOUR (10) },	/* Alaska-Hawaii Standard */
+    { "nt",	tZONE,     HOUR (11) },	/* Nome */
+    { "idlw",	tZONE,     HOUR (12) },	/* International Date Line West */
+    { "cet",	tZONE,     -HOUR (1) },	/* Central European */
+    { "met",	tZONE,     -HOUR (1) },	/* Middle European */
+    { "mewt",	tZONE,     -HOUR (1) },	/* Middle European Winter */
+    { "mest",	tDAYZONE,  -HOUR (1) },	/* Middle European Summer */
+    { "mesz",	tDAYZONE,  -HOUR (1) },	/* Middle European Summer */
+    { "swt",	tZONE,     -HOUR (1) },	/* Swedish Winter */
+    { "sst",	tDAYZONE,  -HOUR (1) },	/* Swedish Summer */
+    { "fwt",	tZONE,     -HOUR (1) },	/* French Winter */
+    { "fst",	tDAYZONE,  -HOUR (1) },	/* French Summer */
+    { "eet",	tZONE,     -HOUR (2) },	/* Eastern Europe, USSR Zone 1 */
+    { "bt",	tZONE,     -HOUR (3) },	/* Baghdad, USSR Zone 2 */
+    { "zp4",	tZONE,     -HOUR (4) },	/* USSR Zone 3 */
+    { "zp5",	tZONE,     -HOUR (5) },	/* USSR Zone 4 */
+    { "zp6",	tZONE,     -HOUR (6) },	/* USSR Zone 5 */
+    { "wast",	tZONE,     -HOUR (7) },	/* West Australian Standard */
+    { "wadt",	tDAYZONE,  -HOUR (7) },	/* West Australian Daylight */
+    { "cct",	tZONE,     -HOUR (8) },	/* China Coast, USSR Zone 7 */
+    { "jst",	tZONE,     -HOUR (9) },	/* Japan Standard, USSR Zone 8 */
+    { "east",	tZONE,     -HOUR (10) },	/* Eastern Australian Standard */
+    { "eadt",	tDAYZONE,  -HOUR (10) },	/* Eastern Australian Daylight */
+    { "gst",	tZONE,     -HOUR (10) },	/* Guam Standard, USSR Zone 9 */
+    { "nzt",	tZONE,     -HOUR (12) },	/* New Zealand */
+    { "nzst",	tZONE,     -HOUR (12) },	/* New Zealand Standard */
+    { "nzdt",	tDAYZONE,  -HOUR (12) },	/* New Zealand Daylight */
+    { "idle",	tZONE,     -HOUR (12) },	/* International Date Line East */
+    { NULL, 0, 0 }
+};
+
+/* Military timezone table. */
+static TABLE const MilitaryTable[] = {
+    { "a",	tZONE,	HOUR (  1) },
+    { "b",	tZONE,	HOUR (  2) },
+    { "c",	tZONE,	HOUR (  3) },
+    { "d",	tZONE,	HOUR (  4) },
+    { "e",	tZONE,	HOUR (  5) },
+    { "f",	tZONE,	HOUR (  6) },
+    { "g",	tZONE,	HOUR (  7) },
+    { "h",	tZONE,	HOUR (  8) },
+    { "i",	tZONE,	HOUR (  9) },
+    { "k",	tZONE,	HOUR ( 10) },
+    { "l",	tZONE,	HOUR ( 11) },
+    { "m",	tZONE,	HOUR ( 12) },
+    { "n",	tZONE,	HOUR (- 1) },
+    { "o",	tZONE,	HOUR (- 2) },
+    { "p",	tZONE,	HOUR (- 3) },
+    { "q",	tZONE,	HOUR (- 4) },
+    { "r",	tZONE,	HOUR (- 5) },
+    { "s",	tZONE,	HOUR (- 6) },
+    { "t",	tZONE,	HOUR (- 7) },
+    { "u",	tZONE,	HOUR (- 8) },
+    { "v",	tZONE,	HOUR (- 9) },
+    { "w",	tZONE,	HOUR (-10) },
+    { "x",	tZONE,	HOUR (-11) },
+    { "y",	tZONE,	HOUR (-12) },
+    { "z",	tZONE,	HOUR (  0) },
+    { NULL, 0, 0 }
+};
+
+
+
+
+static int yyerror (MAYBE_UNUSED const char *s)
+{
+  return 0;
+}
+
+static int ToHour (int Hours, MERIDIAN Meridian)
+{
+  switch (Meridian)
+    {
+    case MER24:
+      if (Hours < 0 || Hours > 23)
+	return -1;
+      return Hours;
+    case MERam:
+      if (Hours < 1 || Hours > 12)
+	return -1;
+      if (Hours == 12)
+	Hours = 0;
+      return Hours;
+    case MERpm:
+      if (Hours < 1 || Hours > 12)
+	return -1;
+      if (Hours == 12)
+	Hours = 0;
+      return Hours + 12;
+    default:
+      abort ();
+    }
+  /* NOTREACHED */
+}
+
+static int ToYear (int Year)
+{
+  if (Year < 0)
+    Year = -Year;
+
+  /* XPG4 suggests that years 00-68 map to 2000-2068, and
+     years 69-99 map to 1969-1999.  */
+  if (Year < 69)
+    Year += 2000;
+  else if (Year < 100)
+    Year += 1900;
+
+  return Year;
+}
+
+static int LookupWord (char *buff)
+{
+  register char *p;
+  register char *q;
+  register const TABLE *tp;
+  int i;
+  bool abbrev;
+
+  /* Make it lowercase. */
+  for (p = buff; '\0' != *p; p++)
+    if (isupper (*p))
+      *p = tolower (*p);
+
+  if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0)
+    {
+      yylval.Meridian = MERam;
+      return tMERIDIAN;
+    }
+  if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0)
+    {
+      yylval.Meridian = MERpm;
+      return tMERIDIAN;
+    }
+
+  /* See if we have an abbreviation for a month. */
+  if (strlen (buff) == 3)
+    abbrev = true;
+  else if (strlen (buff) == 4 && buff[3] == '.')
+    {
+      abbrev = true;
+      buff[3] = '\0';
+    }
+  else
+    abbrev = false;
+
+  for (tp = MonthDayTable; tp->name; tp++)
+    {
+      if (abbrev)
+	{
+	  if (strncmp (buff, tp->name, 3) == 0)
+	    {
+	      yylval.Number = tp->value;
+	      return tp->type;
+	    }
+	}
+      else if (strcmp (buff, tp->name) == 0)
+	{
+	  yylval.Number = tp->value;
+	  return tp->type;
+	}
+    }
+
+  for (tp = TimezoneTable; tp->name; tp++)
+    if (strcmp (buff, tp->name) == 0)
+      {
+	yylval.Number = tp->value;
+	return tp->type;
+      }
+
+  if (strcmp (buff, "dst") == 0)
+    return tDST;
+
+  for (tp = UnitsTable; tp->name; tp++)
+    if (strcmp (buff, tp->name) == 0)
+      {
+	yylval.Number = tp->value;
+	return tp->type;
+      }
+
+  /* Strip off any plural and try the units table again. */
+  i = strlen (buff) - 1;
+  if (buff[i] == 's')
+    {
+      buff[i] = '\0';
+      for (tp = UnitsTable; tp->name; tp++)
+	if (strcmp (buff, tp->name) == 0)
+	  {
+	    yylval.Number = tp->value;
+	    return tp->type;
+	  }
+      buff[i] = 's';		/* Put back for "this" in OtherTable. */
+    }
+
+  for (tp = OtherTable; tp->name; tp++)
+    if (strcmp (buff, tp->name) == 0)
+      {
+	yylval.Number = tp->value;
+	return tp->type;
+      }
+
+  /* Military timezones. */
+  if (buff[1] == '\0' && isalpha (*buff))
+    {
+      for (tp = MilitaryTable; tp->name; tp++)
+	if (strcmp (buff, tp->name) == 0)
+	  {
+	    yylval.Number = tp->value;
+	    return tp->type;
+	  }
+    }
+
+  /* Drop out any periods and try the timezone table again. */
+  for (i = 0, p = q = buff; '\0' != *q; q++)
+    if (*q != '.')
+      *p++ = *q;
+    else
+      i++;
+  *p = '\0';
+  if (0 != i)
+    for (tp = TimezoneTable; NULL != tp->name; tp++)
+      if (strcmp (buff, tp->name) == 0)
+	{
+	  yylval.Number = tp->value;
+	  return tp->type;
+	}
+
+  return tID;
+}
+
+static int
+yylex (void)
+{
+  register char c;
+  register char *p;
+  char buff[20];
+  int Count;
+  int sign;
+
+  for (;;)
+    {
+      while (isspace (*yyInput))
+	yyInput++;
+
+      if (isdigit (c = *yyInput) || c == '-' || c == '+')
+	{
+	  if (c == '-' || c == '+')
+	    {
+	      sign = c == '-' ? -1 : 1;
+	      if (!isdigit (*++yyInput))
+		/* skip the '-' sign */
+		continue;
+	    }
+	  else
+	    sign = 0;
+	  for (yylval.Number = 0; isdigit (c = *yyInput++);)
+	    yylval.Number = 10 * yylval.Number + c - '0';
+	  yyInput--;
+	  if (sign < 0)
+	    yylval.Number = -yylval.Number;
+	  return (0 != sign) ? tSNUMBER : tUNUMBER;
+	}
+      if (isalpha (c))
+	{
+	  for (p = buff; (c = *yyInput++, isalpha (c)) || c == '.';)
+	    if (p < &buff[sizeof buff - 1])
+	      *p++ = c;
+	  *p = '\0';
+	  yyInput--;
+	  return LookupWord (buff);
+	}
+      if (c != '(')
+	return *yyInput++;
+      Count = 0;
+      do
+	{
+	  c = *yyInput++;
+	  if (c == '\0')
+	    return c;
+	  if (c == '(')
+	    Count++;
+	  else if (c == ')')
+	    Count--;
+	}
+      while (Count > 0);
+    }
+}
+
+#define TM_YEAR_ORIGIN 1900
+
+/* Yield A - B, measured in seconds.  */
+static long difftm (struct tm *a, struct tm *b)
+{
+  int ay = a->tm_year + (TM_YEAR_ORIGIN - 1);
+  int by = b->tm_year + (TM_YEAR_ORIGIN - 1);
+  long days = (
+  /* difference in day of year */
+		a->tm_yday - b->tm_yday
+  /* + intervening leap days */
+		+ ((ay >> 2) - (by >> 2))
+		- (ay / 100 - by / 100)
+		+ ((ay / 100 >> 2) - (by / 100 >> 2))
+  /* + difference in years * 365 */
+		+ (long) (ay - by) * 365
+  );
+  return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
+		+ (a->tm_min - b->tm_min))
+	  + (a->tm_sec - b->tm_sec));
+}
+
+time_t get_date (const char *p, const time_t *now)
+{
+  struct tm tm, tm0, *tmp;
+  time_t Start;
+
+  yyInput = p;
+  Start = now ? *now : time ((time_t *) NULL);
+  tmp = localtime (&Start);
+  yyYear = tmp->tm_year + TM_YEAR_ORIGIN;
+  yyMonth = tmp->tm_mon + 1;
+  yyDay = tmp->tm_mday;
+  yyHour = tmp->tm_hour;
+  yyMinutes = tmp->tm_min;
+  yySeconds = tmp->tm_sec;
+  yyMeridian = MER24;
+  yyRelSeconds = 0;
+  yyRelMinutes = 0;
+  yyRelHour = 0;
+  yyRelDay = 0;
+  yyRelMonth = 0;
+  yyRelYear = 0;
+  yyHaveDate = 0;
+  yyHaveDay = 0;
+  yyHaveRel = 0;
+  yyHaveTime = 0;
+  yyHaveZone = 0;
+
+  if (yyparse ()
+      || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
+    return -1;
+
+  tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear;
+  tm.tm_mon = yyMonth - 1 + yyRelMonth;
+  tm.tm_mday = yyDay + yyRelDay;
+  if ((yyHaveTime != 0) ||
+      ( (yyHaveRel != 0) && (yyHaveDate == 0) && (yyHaveDay == 0) ))
+    {
+      tm.tm_hour = ToHour (yyHour, yyMeridian);
+      if (tm.tm_hour < 0)
+	return -1;
+      tm.tm_min = yyMinutes;
+      tm.tm_sec = yySeconds;
+    }
+  else
+    {
+      tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+    }
+  tm.tm_hour += yyRelHour;
+  tm.tm_min += yyRelMinutes;
+  tm.tm_sec += yyRelSeconds;
+  tm.tm_isdst = -1;
+  tm0 = tm;
+
+  Start = mktime (&tm);
+
+  if (Start == (time_t) -1)
+    {
+
+      /* Guard against falsely reporting errors near the time_t boundaries
+         when parsing times in other time zones.  For example, if the min
+         time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead
+         of UTC, then the min localtime value is 1970-01-01 08:00:00; if
+         we apply mktime to 1970-01-01 00:00:00 we will get an error, so
+         we apply mktime to 1970-01-02 08:00:00 instead and adjust the time
+         zone by 24 hours to compensate.  This algorithm assumes that
+         there is no DST transition within a day of the time_t boundaries.  */
+      if (yyHaveZone)
+	{
+	  tm = tm0;
+	  if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN)
+	    {
+	      tm.tm_mday++;
+	      yyTimezone -= 24 * 60;
+	    }
+	  else
+	    {
+	      tm.tm_mday--;
+	      yyTimezone += 24 * 60;
+	    }
+	  Start = mktime (&tm);
+	}
+
+      if (Start == (time_t) -1)
+	return Start;
+    }
+
+  if (yyHaveDay && !yyHaveDate)
+    {
+      tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7
+		     + 7 * (yyDayOrdinal - (0 < yyDayOrdinal)));
+      Start = mktime (&tm);
+      if (Start == (time_t) -1)
+	return Start;
+    }
+
+  if (yyHaveZone)
+    {
+      long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start));
+      if ((Start + delta < Start) != (delta < 0))
+	return -1;		/* time_t overflow */
+      Start += delta;
+    }
+
+  return Start;
+}
+
+#if	defined (TEST)
+
+int
+main(void)
+{
+  char buff[MAX_BUFF_LEN + 1];
+  time_t d;
+
+  (void) printf ("Enter date, or blank line to exit.\n\t> ");
+  (void) fflush (stdout);
+
+  buff[MAX_BUFF_LEN] = 0;
+  while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
+    {
+      d = get_date (buff, (time_t *) NULL);
+      if (d == -1)
+	(void) printf ("Bad format - couldn't convert.\n");
+      else
+	(void) printf ("%s", ctime (&d));
+      (void) printf ("\t> ");
+      (void) fflush (stdout);
+    }
+  exit (0);
+  /* NOTREACHED */
+}
+#endif /* defined (TEST) */
diff --git a/lib/getdate.h b/lib/getdate.h
new file mode 100644
index 0000000..eae56f6
--- /dev/null
+++ b/lib/getdate.h
@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1997 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2005       , Tomasz Kłoczko
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _GETDATE_H_
+#define _GETDATE_H_
+
+#include <config.h>
+#include "defines.h"
+
+time_t get_date (const char *p, /*@null@*/const time_t *now);
+#endif
diff --git a/lib/getdate.y b/lib/getdate.y
new file mode 100644
index 0000000..8cea2cc
--- /dev/null
+++ b/lib/getdate.y
@@ -0,0 +1,949 @@
+%{
+/*
+**  Originally written by Steven M. Bellovin <smb@research.att.com> while
+**  at the University of North Carolina at Chapel Hill.  Later tweaked by
+**  a couple of people on Usenet.  Completely overhauled by Rich $alz
+**  <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
+**
+**  This grammar has 13 shift/reduce conflicts.
+**
+**  This code is in the public domain and has no copyright.
+*/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+/* Since the code of getdate.y is not included in the Emacs executable
+   itself, there is no need to #define static in this file.  Even if
+   the code were included in the Emacs executable, it probably
+   wouldn't do any harm to #undef it here; this will only cause
+   problems if we try to write to a static variable, which I don't
+   think this code needs to do.  */
+#ifdef emacs
+# undef static
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <time.h>
+
+#include "attr.h"
+#include "getdate.h"
+
+#include <string.h>
+
+/* Some old versions of bison generate parsers that use bcopy.
+   That loses on systems that don't provide the function, so we have
+   to redefine it here.  */
+#if !defined (HAVE_BCOPY) && !defined (bcopy)
+# define bcopy(from, to, len) memcpy ((to), (from), (len))
+#endif
+
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
+   as well as gratuitously global symbol names, so we can have multiple
+   yacc generated parsers in the same program.  Note that these are only
+   the variables produced by yacc.  If other parser generators (bison,
+   byacc, etc) produce additional global names that conflict at link time,
+   then those parser generators need to be fixed instead of adding those
+   names to this list. */
+
+#define yymaxdepth gd_maxdepth
+#define yyparse gd_parse
+#define yylex   gd_lex
+#define yyerror gd_error
+#define yylval  gd_lval
+#define yychar  gd_char
+#define yydebug gd_debug
+#define yypact  gd_pact
+#define yyr1    gd_r1
+#define yyr2    gd_r2
+#define yydef   gd_def
+#define yychk   gd_chk
+#define yypgo   gd_pgo
+#define yyact   gd_act
+#define yyexca  gd_exca
+#define yyerrflag gd_errflag
+#define yynerrs gd_nerrs
+#define yyps    gd_ps
+#define yypv    gd_pv
+#define yys     gd_s
+#define yy_yys  gd_yys
+#define yystate gd_state
+#define yytmp   gd_tmp
+#define yyv     gd_v
+#define yy_yyv  gd_yyv
+#define yyval   gd_val
+#define yylloc  gd_lloc
+#define yyreds  gd_reds          /* With YYDEBUG defined */
+#define yytoks  gd_toks          /* With YYDEBUG defined */
+#define yylhs   gd_yylhs
+#define yylen   gd_yylen
+#define yydefred gd_yydefred
+#define yydgoto gd_yydgoto
+#define yysindex gd_yysindex
+#define yyrindex gd_yyrindex
+#define yygindex gd_yygindex
+#define yytable  gd_yytable
+#define yycheck  gd_yycheck
+
+static int yylex (void);
+static int yyerror (const char *s);
+
+#define EPOCH		1970
+#define HOUR(x)		((x) * 60)
+
+#define MAX_BUFF_LEN    128   /* size of buffer to read the date into */
+
+/*
+**  An entry in the lexical lookup table.
+*/
+typedef struct _TABLE {
+    const char	*name;
+    int		type;
+    int		value;
+} TABLE;
+
+
+/*
+**  Meridian:  am, pm, or 24-hour style.
+*/
+typedef enum _MERIDIAN {
+    MERam, MERpm, MER24
+} MERIDIAN;
+
+
+/*
+**  Global variables.  We could get rid of most of these by using a good
+**  union as the yacc stack.  (This routine was originally written before
+**  yacc had the %union construct.)  Maybe someday; right now we only use
+**  the %union very rarely.
+*/
+static const char	*yyInput;
+static int	yyDayOrdinal;
+static int	yyDayNumber;
+static int	yyHaveDate;
+static int	yyHaveDay;
+static int	yyHaveRel;
+static int	yyHaveTime;
+static int	yyHaveZone;
+static int	yyTimezone;
+static int	yyDay;
+static int	yyHour;
+static int	yyMinutes;
+static int	yyMonth;
+static int	yySeconds;
+static int	yyYear;
+static MERIDIAN	yyMeridian;
+static int	yyRelDay;
+static int	yyRelHour;
+static int	yyRelMinutes;
+static int	yyRelMonth;
+static int	yyRelSeconds;
+static int	yyRelYear;
+
+%}
+
+%union {
+    int			Number;
+    enum _MERIDIAN	Meridian;
+}
+
+%token	tAGO tDAY tDAY_UNIT tDAYZONE tDST tHOUR_UNIT tID
+%token	tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
+%token	tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE
+
+%type	<Number>	tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tMINUTE_UNIT
+%type	<Number>	tMONTH tMONTH_UNIT
+%type	<Number>	tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE
+%type	<Meridian>	tMERIDIAN o_merid
+
+%%
+
+spec	: /* NULL */
+	| spec item
+	;
+
+item	: time {
+	    yyHaveTime++;
+	}
+	| zone {
+	    yyHaveZone++;
+	}
+	| date {
+	    yyHaveDate++;
+	}
+	| day {
+	    yyHaveDay++;
+	}
+	| rel {
+	    yyHaveRel++;
+	}
+	| number
+	;
+
+time	: tUNUMBER tMERIDIAN {
+	    yyHour = $1;
+	    yyMinutes = 0;
+	    yySeconds = 0;
+	    yyMeridian = $2;
+	}
+	| tUNUMBER ':' tUNUMBER o_merid {
+	    yyHour = $1;
+	    yyMinutes = $3;
+	    yySeconds = 0;
+	    yyMeridian = $4;
+	}
+	| tUNUMBER ':' tUNUMBER tSNUMBER {
+	    yyHour = $1;
+	    yyMinutes = $3;
+	    yyMeridian = MER24;
+	    yyHaveZone++;
+	    yyTimezone = ($4 < 0
+			  ? -$4 % 100 + (-$4 / 100) * 60
+			  : - ($4 % 100 + ($4 / 100) * 60));
+	}
+	| tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
+	    yyHour = $1;
+	    yyMinutes = $3;
+	    yySeconds = $5;
+	    yyMeridian = $6;
+	}
+	| tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
+	    yyHour = $1;
+	    yyMinutes = $3;
+	    yySeconds = $5;
+	    yyMeridian = MER24;
+	    yyHaveZone++;
+	    yyTimezone = ($6 < 0
+			  ? -$6 % 100 + (-$6 / 100) * 60
+			  : - ($6 % 100 + ($6 / 100) * 60));
+	}
+	;
+
+zone	: tZONE {
+	    yyTimezone = $1;
+	}
+	| tDAYZONE {
+	    yyTimezone = $1 - 60;
+	}
+	|
+	  tZONE tDST {
+	    yyTimezone = $1 - 60;
+	}
+	;
+
+day	: tDAY {
+	    yyDayOrdinal = 1;
+	    yyDayNumber = $1;
+	}
+	| tDAY ',' {
+	    yyDayOrdinal = 1;
+	    yyDayNumber = $1;
+	}
+	| tUNUMBER tDAY {
+	    yyDayOrdinal = $1;
+	    yyDayNumber = $2;
+	}
+	;
+
+date	: tUNUMBER '/' tUNUMBER {
+	    yyMonth = $1;
+	    yyDay = $3;
+	}
+	| tUNUMBER '/' tUNUMBER '/' tUNUMBER {
+	  /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY.
+	     The goal in recognizing YYYY/MM/DD is solely to support legacy
+	     machine-generated dates like those in an RCS log listing.  If
+	     you want portability, use the ISO 8601 format.  */
+	  if ($1 >= 1000)
+	    {
+	      yyYear = $1;
+	      yyMonth = $3;
+	      yyDay = $5;
+	    }
+	  else
+	    {
+	      yyMonth = $1;
+	      yyDay = $3;
+	      yyYear = $5;
+	    }
+	}
+	| tUNUMBER tSNUMBER tSNUMBER {
+	    /* ISO 8601 format.  yyyy-mm-dd.  */
+	    yyYear = $1;
+	    yyMonth = -$2;
+	    yyDay = -$3;
+	}
+	| tUNUMBER tMONTH tSNUMBER {
+	    /* e.g. 17-JUN-1992.  */
+	    yyDay = $1;
+	    yyMonth = $2;
+	    yyYear = -$3;
+	}
+	| tMONTH tUNUMBER {
+	    yyMonth = $1;
+	    yyDay = $2;
+	}
+	| tMONTH tUNUMBER ',' tUNUMBER {
+	    yyMonth = $1;
+	    yyDay = $2;
+	    yyYear = $4;
+	}
+	| tUNUMBER tMONTH {
+	    yyMonth = $2;
+	    yyDay = $1;
+	}
+	| tUNUMBER tMONTH tUNUMBER {
+	    yyMonth = $2;
+	    yyDay = $1;
+	    yyYear = $3;
+	}
+	;
+
+rel	: relunit tAGO {
+	    yyRelSeconds = -yyRelSeconds;
+	    yyRelMinutes = -yyRelMinutes;
+	    yyRelHour = -yyRelHour;
+	    yyRelDay = -yyRelDay;
+	    yyRelMonth = -yyRelMonth;
+	    yyRelYear = -yyRelYear;
+	}
+	| relunit
+	;
+
+relunit	: tUNUMBER tYEAR_UNIT {
+	    yyRelYear += $1 * $2;
+	}
+	| tSNUMBER tYEAR_UNIT {
+	    yyRelYear += $1 * $2;
+	}
+	| tYEAR_UNIT {
+	    yyRelYear += $1;
+	}
+	| tUNUMBER tMONTH_UNIT {
+	    yyRelMonth += $1 * $2;
+	}
+	| tSNUMBER tMONTH_UNIT {
+	    yyRelMonth += $1 * $2;
+	}
+	| tMONTH_UNIT {
+	    yyRelMonth += $1;
+	}
+	| tUNUMBER tDAY_UNIT {
+	    yyRelDay += $1 * $2;
+	}
+	| tSNUMBER tDAY_UNIT {
+	    yyRelDay += $1 * $2;
+	}
+	| tDAY_UNIT {
+	    yyRelDay += $1;
+	}
+	| tUNUMBER tHOUR_UNIT {
+	    yyRelHour += $1 * $2;
+	}
+	| tSNUMBER tHOUR_UNIT {
+	    yyRelHour += $1 * $2;
+	}
+	| tHOUR_UNIT {
+	    yyRelHour += $1;
+	}
+	| tUNUMBER tMINUTE_UNIT {
+	    yyRelMinutes += $1 * $2;
+	}
+	| tSNUMBER tMINUTE_UNIT {
+	    yyRelMinutes += $1 * $2;
+	}
+	| tMINUTE_UNIT {
+	    yyRelMinutes += $1;
+	}
+	| tUNUMBER tSEC_UNIT {
+	    yyRelSeconds += $1 * $2;
+	}
+	| tSNUMBER tSEC_UNIT {
+	    yyRelSeconds += $1 * $2;
+	}
+	| tSEC_UNIT {
+	    yyRelSeconds += $1;
+	}
+	;
+
+number	: tUNUMBER
+          {
+	    if ((yyHaveTime != 0) && (yyHaveDate != 0) && (yyHaveRel == 0))
+	      yyYear = $1;
+	    else
+	      {
+		if ($1>10000)
+		  {
+		    yyHaveDate++;
+		    yyDay= ($1)%100;
+		    yyMonth= ($1/100)%100;
+		    yyYear = $1/10000;
+		  }
+		else
+		  {
+		    yyHaveTime++;
+		    if ($1 < 100)
+		      {
+			yyHour = $1;
+			yyMinutes = 0;
+		      }
+		    else
+		      {
+		    	yyHour = $1 / 100;
+		    	yyMinutes = $1 % 100;
+		      }
+		    yySeconds = 0;
+		    yyMeridian = MER24;
+		  }
+	      }
+	  }
+	;
+
+o_merid	: /* NULL */
+	  {
+	    $$ = MER24;
+	  }
+	| tMERIDIAN
+	  {
+	    $$ = $1;
+	  }
+	;
+
+%%
+
+/* Month and day table. */
+static TABLE const MonthDayTable[] = {
+    { "january",	tMONTH,  1 },
+    { "february",	tMONTH,  2 },
+    { "march",		tMONTH,  3 },
+    { "april",		tMONTH,  4 },
+    { "may",		tMONTH,  5 },
+    { "june",		tMONTH,  6 },
+    { "july",		tMONTH,  7 },
+    { "august",		tMONTH,  8 },
+    { "september",	tMONTH,  9 },
+    { "sept",		tMONTH,  9 },
+    { "october",	tMONTH, 10 },
+    { "november",	tMONTH, 11 },
+    { "december",	tMONTH, 12 },
+    { "sunday",		tDAY, 0 },
+    { "monday",		tDAY, 1 },
+    { "tuesday",	tDAY, 2 },
+    { "tues",		tDAY, 2 },
+    { "wednesday",	tDAY, 3 },
+    { "wednes",		tDAY, 3 },
+    { "thursday",	tDAY, 4 },
+    { "thur",		tDAY, 4 },
+    { "thurs",		tDAY, 4 },
+    { "friday",		tDAY, 5 },
+    { "saturday",	tDAY, 6 },
+    { NULL, 0, 0 }
+};
+
+/* Time units table. */
+static TABLE const UnitsTable[] = {
+    { "year",		tYEAR_UNIT,	1 },
+    { "month",		tMONTH_UNIT,	1 },
+    { "fortnight",	tDAY_UNIT,	14 },
+    { "week",		tDAY_UNIT,	7 },
+    { "day",		tDAY_UNIT,	1 },
+    { "hour",		tHOUR_UNIT,	1 },
+    { "minute",		tMINUTE_UNIT,	1 },
+    { "min",		tMINUTE_UNIT,	1 },
+    { "second",		tSEC_UNIT,	1 },
+    { "sec",		tSEC_UNIT,	1 },
+    { NULL, 0, 0 }
+};
+
+/* Assorted relative-time words. */
+static TABLE const OtherTable[] = {
+    { "tomorrow",	tMINUTE_UNIT,	1 * 24 * 60 },
+    { "yesterday",	tMINUTE_UNIT,	-1 * 24 * 60 },
+    { "today",		tMINUTE_UNIT,	0 },
+    { "now",		tMINUTE_UNIT,	0 },
+    { "last",		tUNUMBER,	-1 },
+    { "this",		tMINUTE_UNIT,	0 },
+    { "next",		tUNUMBER,	2 },
+    { "first",		tUNUMBER,	1 },
+/*  { "second",		tUNUMBER,	2 }, */
+    { "third",		tUNUMBER,	3 },
+    { "fourth",		tUNUMBER,	4 },
+    { "fifth",		tUNUMBER,	5 },
+    { "sixth",		tUNUMBER,	6 },
+    { "seventh",	tUNUMBER,	7 },
+    { "eighth",		tUNUMBER,	8 },
+    { "ninth",		tUNUMBER,	9 },
+    { "tenth",		tUNUMBER,	10 },
+    { "eleventh",	tUNUMBER,	11 },
+    { "twelfth",	tUNUMBER,	12 },
+    { "ago",		tAGO,	1 },
+    { NULL, 0, 0 }
+};
+
+/* The timezone table. */
+static TABLE const TimezoneTable[] = {
+    { "gmt",	tZONE,     HOUR ( 0) },	/* Greenwich Mean */
+    { "ut",	tZONE,     HOUR ( 0) },	/* Universal (Coordinated) */
+    { "utc",	tZONE,     HOUR ( 0) },
+    { "wet",	tZONE,     HOUR ( 0) },	/* Western European */
+    { "bst",	tDAYZONE,  HOUR ( 0) },	/* British Summer */
+    { "wat",	tZONE,     HOUR ( 1) },	/* West Africa */
+    { "at",	tZONE,     HOUR ( 2) },	/* Azores */
+    { "ast",	tZONE,     HOUR ( 4) },	/* Atlantic Standard */
+    { "adt",	tDAYZONE,  HOUR ( 4) },	/* Atlantic Daylight */
+    { "est",	tZONE,     HOUR ( 5) },	/* Eastern Standard */
+    { "edt",	tDAYZONE,  HOUR ( 5) },	/* Eastern Daylight */
+    { "cst",	tZONE,     HOUR ( 6) },	/* Central Standard */
+    { "cdt",	tDAYZONE,  HOUR ( 6) },	/* Central Daylight */
+    { "mst",	tZONE,     HOUR ( 7) },	/* Mountain Standard */
+    { "mdt",	tDAYZONE,  HOUR ( 7) },	/* Mountain Daylight */
+    { "pst",	tZONE,     HOUR ( 8) },	/* Pacific Standard */
+    { "pdt",	tDAYZONE,  HOUR ( 8) },	/* Pacific Daylight */
+    { "yst",	tZONE,     HOUR ( 9) },	/* Yukon Standard */
+    { "ydt",	tDAYZONE,  HOUR ( 9) },	/* Yukon Daylight */
+    { "hst",	tZONE,     HOUR (10) },	/* Hawaii Standard */
+    { "hdt",	tDAYZONE,  HOUR (10) },	/* Hawaii Daylight */
+    { "cat",	tZONE,     HOUR (10) },	/* Central Alaska */
+    { "ahst",	tZONE,     HOUR (10) },	/* Alaska-Hawaii Standard */
+    { "nt",	tZONE,     HOUR (11) },	/* Nome */
+    { "idlw",	tZONE,     HOUR (12) },	/* International Date Line West */
+    { "cet",	tZONE,     -HOUR (1) },	/* Central European */
+    { "met",	tZONE,     -HOUR (1) },	/* Middle European */
+    { "mewt",	tZONE,     -HOUR (1) },	/* Middle European Winter */
+    { "mest",	tDAYZONE,  -HOUR (1) },	/* Middle European Summer */
+    { "mesz",	tDAYZONE,  -HOUR (1) },	/* Middle European Summer */
+    { "swt",	tZONE,     -HOUR (1) },	/* Swedish Winter */
+    { "sst",	tDAYZONE,  -HOUR (1) },	/* Swedish Summer */
+    { "fwt",	tZONE,     -HOUR (1) },	/* French Winter */
+    { "fst",	tDAYZONE,  -HOUR (1) },	/* French Summer */
+    { "eet",	tZONE,     -HOUR (2) },	/* Eastern Europe, USSR Zone 1 */
+    { "bt",	tZONE,     -HOUR (3) },	/* Baghdad, USSR Zone 2 */
+    { "zp4",	tZONE,     -HOUR (4) },	/* USSR Zone 3 */
+    { "zp5",	tZONE,     -HOUR (5) },	/* USSR Zone 4 */
+    { "zp6",	tZONE,     -HOUR (6) },	/* USSR Zone 5 */
+    { "wast",	tZONE,     -HOUR (7) },	/* West Australian Standard */
+    { "wadt",	tDAYZONE,  -HOUR (7) },	/* West Australian Daylight */
+    { "cct",	tZONE,     -HOUR (8) },	/* China Coast, USSR Zone 7 */
+    { "jst",	tZONE,     -HOUR (9) },	/* Japan Standard, USSR Zone 8 */
+    { "east",	tZONE,     -HOUR (10) },	/* Eastern Australian Standard */
+    { "eadt",	tDAYZONE,  -HOUR (10) },	/* Eastern Australian Daylight */
+    { "gst",	tZONE,     -HOUR (10) },	/* Guam Standard, USSR Zone 9 */
+    { "nzt",	tZONE,     -HOUR (12) },	/* New Zealand */
+    { "nzst",	tZONE,     -HOUR (12) },	/* New Zealand Standard */
+    { "nzdt",	tDAYZONE,  -HOUR (12) },	/* New Zealand Daylight */
+    { "idle",	tZONE,     -HOUR (12) },	/* International Date Line East */
+    { NULL, 0, 0 }
+};
+
+/* Military timezone table. */
+static TABLE const MilitaryTable[] = {
+    { "a",	tZONE,	HOUR (  1) },
+    { "b",	tZONE,	HOUR (  2) },
+    { "c",	tZONE,	HOUR (  3) },
+    { "d",	tZONE,	HOUR (  4) },
+    { "e",	tZONE,	HOUR (  5) },
+    { "f",	tZONE,	HOUR (  6) },
+    { "g",	tZONE,	HOUR (  7) },
+    { "h",	tZONE,	HOUR (  8) },
+    { "i",	tZONE,	HOUR (  9) },
+    { "k",	tZONE,	HOUR ( 10) },
+    { "l",	tZONE,	HOUR ( 11) },
+    { "m",	tZONE,	HOUR ( 12) },
+    { "n",	tZONE,	HOUR (- 1) },
+    { "o",	tZONE,	HOUR (- 2) },
+    { "p",	tZONE,	HOUR (- 3) },
+    { "q",	tZONE,	HOUR (- 4) },
+    { "r",	tZONE,	HOUR (- 5) },
+    { "s",	tZONE,	HOUR (- 6) },
+    { "t",	tZONE,	HOUR (- 7) },
+    { "u",	tZONE,	HOUR (- 8) },
+    { "v",	tZONE,	HOUR (- 9) },
+    { "w",	tZONE,	HOUR (-10) },
+    { "x",	tZONE,	HOUR (-11) },
+    { "y",	tZONE,	HOUR (-12) },
+    { "z",	tZONE,	HOUR (  0) },
+    { NULL, 0, 0 }
+};
+
+
+
+
+static int yyerror (MAYBE_UNUSED const char *s)
+{
+  return 0;
+}
+
+static int ToHour (int Hours, MERIDIAN Meridian)
+{
+  switch (Meridian)
+    {
+    case MER24:
+      if (Hours < 0 || Hours > 23)
+	return -1;
+      return Hours;
+    case MERam:
+      if (Hours < 1 || Hours > 12)
+	return -1;
+      if (Hours == 12)
+	Hours = 0;
+      return Hours;
+    case MERpm:
+      if (Hours < 1 || Hours > 12)
+	return -1;
+      if (Hours == 12)
+	Hours = 0;
+      return Hours + 12;
+    default:
+      abort ();
+    }
+  /* NOTREACHED */
+}
+
+static int ToYear (int Year)
+{
+  if (Year < 0)
+    Year = -Year;
+
+  /* XPG4 suggests that years 00-68 map to 2000-2068, and
+     years 69-99 map to 1969-1999.  */
+  if (Year < 69)
+    Year += 2000;
+  else if (Year < 100)
+    Year += 1900;
+
+  return Year;
+}
+
+static int LookupWord (char *buff)
+{
+  register char *p;
+  register char *q;
+  register const TABLE *tp;
+  int i;
+  bool abbrev;
+
+  /* Make it lowercase. */
+  for (p = buff; '\0' != *p; p++)
+    if (isupper (*p))
+      *p = tolower (*p);
+
+  if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0)
+    {
+      yylval.Meridian = MERam;
+      return tMERIDIAN;
+    }
+  if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0)
+    {
+      yylval.Meridian = MERpm;
+      return tMERIDIAN;
+    }
+
+  /* See if we have an abbreviation for a month. */
+  if (strlen (buff) == 3)
+    abbrev = true;
+  else if (strlen (buff) == 4 && buff[3] == '.')
+    {
+      abbrev = true;
+      buff[3] = '\0';
+    }
+  else
+    abbrev = false;
+
+  for (tp = MonthDayTable; tp->name; tp++)
+    {
+      if (abbrev)
+	{
+	  if (strncmp (buff, tp->name, 3) == 0)
+	    {
+	      yylval.Number = tp->value;
+	      return tp->type;
+	    }
+	}
+      else if (strcmp (buff, tp->name) == 0)
+	{
+	  yylval.Number = tp->value;
+	  return tp->type;
+	}
+    }
+
+  for (tp = TimezoneTable; tp->name; tp++)
+    if (strcmp (buff, tp->name) == 0)
+      {
+	yylval.Number = tp->value;
+	return tp->type;
+      }
+
+  if (strcmp (buff, "dst") == 0)
+    return tDST;
+
+  for (tp = UnitsTable; tp->name; tp++)
+    if (strcmp (buff, tp->name) == 0)
+      {
+	yylval.Number = tp->value;
+	return tp->type;
+      }
+
+  /* Strip off any plural and try the units table again. */
+  i = strlen (buff) - 1;
+  if (buff[i] == 's')
+    {
+      buff[i] = '\0';
+      for (tp = UnitsTable; tp->name; tp++)
+	if (strcmp (buff, tp->name) == 0)
+	  {
+	    yylval.Number = tp->value;
+	    return tp->type;
+	  }
+      buff[i] = 's';		/* Put back for "this" in OtherTable. */
+    }
+
+  for (tp = OtherTable; tp->name; tp++)
+    if (strcmp (buff, tp->name) == 0)
+      {
+	yylval.Number = tp->value;
+	return tp->type;
+      }
+
+  /* Military timezones. */
+  if (buff[1] == '\0' && isalpha (*buff))
+    {
+      for (tp = MilitaryTable; tp->name; tp++)
+	if (strcmp (buff, tp->name) == 0)
+	  {
+	    yylval.Number = tp->value;
+	    return tp->type;
+	  }
+    }
+
+  /* Drop out any periods and try the timezone table again. */
+  for (i = 0, p = q = buff; '\0' != *q; q++)
+    if (*q != '.')
+      *p++ = *q;
+    else
+      i++;
+  *p = '\0';
+  if (0 != i)
+    for (tp = TimezoneTable; NULL != tp->name; tp++)
+      if (strcmp (buff, tp->name) == 0)
+	{
+	  yylval.Number = tp->value;
+	  return tp->type;
+	}
+
+  return tID;
+}
+
+static int
+yylex (void)
+{
+  register char c;
+  register char *p;
+  char buff[20];
+  int Count;
+  int sign;
+
+  for (;;)
+    {
+      while (isspace (*yyInput))
+	yyInput++;
+
+      if (isdigit (c = *yyInput) || c == '-' || c == '+')
+	{
+	  if (c == '-' || c == '+')
+	    {
+	      sign = c == '-' ? -1 : 1;
+	      if (!isdigit (*++yyInput))
+		/* skip the '-' sign */
+		continue;
+	    }
+	  else
+	    sign = 0;
+	  for (yylval.Number = 0; isdigit (c = *yyInput++);)
+	    yylval.Number = 10 * yylval.Number + c - '0';
+	  yyInput--;
+	  if (sign < 0)
+	    yylval.Number = -yylval.Number;
+	  return (0 != sign) ? tSNUMBER : tUNUMBER;
+	}
+      if (isalpha (c))
+	{
+	  for (p = buff; (c = *yyInput++, isalpha (c)) || c == '.';)
+	    if (p < &buff[sizeof buff - 1])
+	      *p++ = c;
+	  *p = '\0';
+	  yyInput--;
+	  return LookupWord (buff);
+	}
+      if (c != '(')
+	return *yyInput++;
+      Count = 0;
+      do
+	{
+	  c = *yyInput++;
+	  if (c == '\0')
+	    return c;
+	  if (c == '(')
+	    Count++;
+	  else if (c == ')')
+	    Count--;
+	}
+      while (Count > 0);
+    }
+}
+
+#define TM_YEAR_ORIGIN 1900
+
+/* Yield A - B, measured in seconds.  */
+static long difftm (struct tm *a, struct tm *b)
+{
+  int ay = a->tm_year + (TM_YEAR_ORIGIN - 1);
+  int by = b->tm_year + (TM_YEAR_ORIGIN - 1);
+  long days = (
+  /* difference in day of year */
+		a->tm_yday - b->tm_yday
+  /* + intervening leap days */
+		+ ((ay >> 2) - (by >> 2))
+		- (ay / 100 - by / 100)
+		+ ((ay / 100 >> 2) - (by / 100 >> 2))
+  /* + difference in years * 365 */
+		+ (long) (ay - by) * 365
+  );
+  return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
+		+ (a->tm_min - b->tm_min))
+	  + (a->tm_sec - b->tm_sec));
+}
+
+time_t get_date (const char *p, const time_t *now)
+{
+  struct tm tm, tm0, *tmp;
+  time_t Start;
+
+  yyInput = p;
+  Start = now ? *now : time ((time_t *) NULL);
+  tmp = localtime (&Start);
+  yyYear = tmp->tm_year + TM_YEAR_ORIGIN;
+  yyMonth = tmp->tm_mon + 1;
+  yyDay = tmp->tm_mday;
+  yyHour = tmp->tm_hour;
+  yyMinutes = tmp->tm_min;
+  yySeconds = tmp->tm_sec;
+  yyMeridian = MER24;
+  yyRelSeconds = 0;
+  yyRelMinutes = 0;
+  yyRelHour = 0;
+  yyRelDay = 0;
+  yyRelMonth = 0;
+  yyRelYear = 0;
+  yyHaveDate = 0;
+  yyHaveDay = 0;
+  yyHaveRel = 0;
+  yyHaveTime = 0;
+  yyHaveZone = 0;
+
+  if (yyparse ()
+      || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
+    return -1;
+
+  tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear;
+  tm.tm_mon = yyMonth - 1 + yyRelMonth;
+  tm.tm_mday = yyDay + yyRelDay;
+  if ((yyHaveTime != 0) ||
+      ( (yyHaveRel != 0) && (yyHaveDate == 0) && (yyHaveDay == 0) ))
+    {
+      tm.tm_hour = ToHour (yyHour, yyMeridian);
+      if (tm.tm_hour < 0)
+	return -1;
+      tm.tm_min = yyMinutes;
+      tm.tm_sec = yySeconds;
+    }
+  else
+    {
+      tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+    }
+  tm.tm_hour += yyRelHour;
+  tm.tm_min += yyRelMinutes;
+  tm.tm_sec += yyRelSeconds;
+  tm.tm_isdst = -1;
+  tm0 = tm;
+
+  Start = mktime (&tm);
+
+  if (Start == (time_t) -1)
+    {
+
+      /* Guard against falsely reporting errors near the time_t boundaries
+         when parsing times in other time zones.  For example, if the min
+         time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead
+         of UTC, then the min localtime value is 1970-01-01 08:00:00; if
+         we apply mktime to 1970-01-01 00:00:00 we will get an error, so
+         we apply mktime to 1970-01-02 08:00:00 instead and adjust the time
+         zone by 24 hours to compensate.  This algorithm assumes that
+         there is no DST transition within a day of the time_t boundaries.  */
+      if (yyHaveZone)
+	{
+	  tm = tm0;
+	  if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN)
+	    {
+	      tm.tm_mday++;
+	      yyTimezone -= 24 * 60;
+	    }
+	  else
+	    {
+	      tm.tm_mday--;
+	      yyTimezone += 24 * 60;
+	    }
+	  Start = mktime (&tm);
+	}
+
+      if (Start == (time_t) -1)
+	return Start;
+    }
+
+  if (yyHaveDay && !yyHaveDate)
+    {
+      tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7
+		     + 7 * (yyDayOrdinal - (0 < yyDayOrdinal)));
+      Start = mktime (&tm);
+      if (Start == (time_t) -1)
+	return Start;
+    }
+
+  if (yyHaveZone)
+    {
+      long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start));
+      if ((Start + delta < Start) != (delta < 0))
+	return -1;		/* time_t overflow */
+      Start += delta;
+    }
+
+  return Start;
+}
+
+#if	defined (TEST)
+
+int
+main(void)
+{
+  char buff[MAX_BUFF_LEN + 1];
+  time_t d;
+
+  (void) printf ("Enter date, or blank line to exit.\n\t> ");
+  (void) fflush (stdout);
+
+  buff[MAX_BUFF_LEN] = 0;
+  while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
+    {
+      d = get_date (buff, (time_t *) NULL);
+      if (d == -1)
+	(void) printf ("Bad format - couldn't convert.\n");
+      else
+	(void) printf ("%s", ctime (&d));
+      (void) printf ("\t> ");
+      (void) fflush (stdout);
+    }
+  exit (0);
+  /* NOTREACHED */
+}
+#endif /* defined (TEST) */
diff --git a/lib/getdef.c b/lib/getdef.c
index dcd1fe7..30f54ba 100644
--- a/lib/getdef.c
+++ b/lib/getdef.c
@@ -13,6 +13,7 @@
 
 #include "prototypes.h"
 #include "defines.h"
+#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ctype.h>
@@ -20,8 +21,14 @@
 #ifdef USE_ECONF
 #include <libeconf.h>
 #endif
+
+#include "alloc.h"
+#include "atoi/str2i.h"
 #include "getdef.h"
 #include "shadowlog_internal.h"
+#include "string/sprintf.h"
+
+
 /*
  * A configuration item definition.
  */
@@ -33,7 +40,6 @@ struct itemdef {
 #define PAMDEFS					\
 	{"CHFN_AUTH", NULL},			\
 	{"CHSH_AUTH", NULL},			\
-	{"CRACKLIB_DICTPATH", NULL},		\
 	{"ENV_HZ", NULL},			\
 	{"ENVIRON_FILE", NULL},			\
 	{"ENV_TZ", NULL},			\
@@ -132,10 +138,8 @@ static struct itemdef def_table[] = {
 #ifndef USE_PAM
 	PAMDEFS
 #endif
-#ifdef USE_SYSLOG
 	{"SYSLOG_SG_ENAB", NULL},
 	{"SYSLOG_SU_ENAB", NULL},
-#endif
 #ifdef WITH_TCB
 	{"TCB_AUTH_GROUP", NULL},
 	{"TCB_SYMLINKS", NULL},
@@ -173,7 +177,7 @@ static const char* def_fname = LOGINDEFS;	/* login config defs file       */
 static bool def_loaded = false;		/* are defs already loaded?     */
 
 /* local function prototypes */
-static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *);
+static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *, const char *);
 static void def_load (void);
 
 
@@ -192,8 +196,8 @@ static void def_load (void);
 		def_load ();
 	}
 
-	d = def_find (item);
-	return ((NULL == d)? (const char *) NULL : d->value);
+	d = def_find (item, NULL);
+	return (NULL == d) ? NULL : d->value;
 }
 
 
@@ -211,7 +215,7 @@ bool getdef_bool (const char *item)
 		def_load ();
 	}
 
-	d = def_find (item);
+	d = def_find (item, NULL);
 	if ((NULL == d) || (NULL == d->value)) {
 		return false;
 	}
@@ -237,21 +241,21 @@ int getdef_num (const char *item, int dflt)
 		def_load ();
 	}
 
-	d = def_find (item);
+	d = def_find (item, NULL);
 	if ((NULL == d) || (NULL == d->value)) {
 		return dflt;
 	}
 
-	if (   (getlong (d->value, &val) == 0)
+	if (   (str2sl(&val, d->value) == -1)
 	    || (val > INT_MAX)
-	    || (val < INT_MIN)) {
+	    || (val < -1)) {
 		fprintf (shadow_logfd,
 		         _("configuration error - cannot parse %s value: '%s'"),
 		         item, d->value);
 		return dflt;
 	}
 
-	return (int) val;
+	return val;
 }
 
 
@@ -272,12 +276,12 @@ unsigned int getdef_unum (const char *item, unsigned int dflt)
 		def_load ();
 	}
 
-	d = def_find (item);
+	d = def_find (item, NULL);
 	if ((NULL == d) || (NULL == d->value)) {
 		return dflt;
 	}
 
-	if (   (getlong (d->value, &val) == 0)
+	if (   (str2sl(&val, d->value) == -1)
 	    || (val < 0)
 	    || (val > INT_MAX)) {
 		fprintf (shadow_logfd,
@@ -286,7 +290,7 @@ unsigned int getdef_unum (const char *item, unsigned int dflt)
 		return dflt;
 	}
 
-	return (unsigned int) val;
+	return val;
 }
 
 
@@ -307,12 +311,12 @@ long getdef_long (const char *item, long dflt)
 		def_load ();
 	}
 
-	d = def_find (item);
+	d = def_find (item, NULL);
 	if ((NULL == d) || (NULL == d->value)) {
 		return dflt;
 	}
 
-	if (getlong (d->value, &val) == 0) {
+	if (str2sl(&val, d->value) == -1 || val < -1) {
 		fprintf (shadow_logfd,
 		         _("configuration error - cannot parse %s value: '%s'"),
 		         item, d->value);
@@ -339,12 +343,12 @@ unsigned long getdef_ulong (const char *item, unsigned long dflt)
 		def_load ();
 	}
 
-	d = def_find (item);
+	d = def_find (item, NULL);
 	if ((NULL == d) || (NULL == d->value)) {
 		return dflt;
 	}
 
-	if (getulong (d->value, &val) == 0) {
+	if (str2ul(&val, d->value) == -1) {
 		fprintf (shadow_logfd,
 		         _("configuration error - cannot parse %s value: '%s'"),
 		         item, d->value);
@@ -359,7 +363,7 @@ unsigned long getdef_ulong (const char *item, unsigned long dflt)
  * (also used when loading the initial defaults)
  */
 
-int putdef_str (const char *name, const char *value)
+int putdef_str (const char *name, const char *value, const char *srcfile)
 {
 	struct itemdef *d;
 	char *cp;
@@ -372,10 +376,9 @@ int putdef_str (const char *name, const char *value)
 	 * Locate the slot to save the value.  If this parameter
 	 * is unknown then "def_find" will print an err message.
 	 */
-	d = def_find (name);
-	if (NULL == d) {
+	d = def_find (name, srcfile);
+	if (NULL == d)
 		return -1;
-	}
 
 	/*
 	 * Save off the value.
@@ -399,9 +402,12 @@ int putdef_str (const char *name, const char *value)
  *
  * Search through a table of configurable items to locate the
  * specified configuration option.
+ *
+ * If srcfile is not NULL, and the item is not found, then report an error saying
+ * the unknown item was used in this file.
  */
 
-static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *name)
+static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *name, const char *srcfile)
 {
 	struct itemdef *ptr;
 
@@ -427,10 +433,11 @@ static /*@observer@*/ /*@null@*/struct itemdef *def_find (const char *name)
 	fprintf (shadow_logfd,
 	         _("configuration error - unknown item '%s' (notify administrator)\n"),
 	         name);
-	SYSLOG ((LOG_CRIT, "unknown configuration item `%s'", name));
+	if (srcfile != NULL)
+		SYSLOG ((LOG_CRIT, "shadow: unknown configuration item '%s' in '%s'", name, srcfile));
 
 out:
-	return (struct itemdef *) NULL;
+	return NULL;
 }
 
 /*
@@ -442,21 +449,12 @@ out:
 void setdef_config_file (const char* file)
 {
 #ifdef USE_ECONF
-	size_t len;
-	char* cp;
-
-	len = strlen(file) + strlen(sysconfdir) + 2;
-	cp = malloc(len);
-	if (cp == NULL)
-		exit (13);
-	snprintf(cp, len, "%s/%s", file, sysconfdir);
+	char  *cp;
+
+	xasprintf(&cp, "%s/%s", file, sysconfdir);
 	sysconfdir = cp;
 #ifdef VENDORDIR
-	len = strlen(file) + strlen(vendordir) + 2;
-	cp = malloc(len);
-	if (cp == NULL)
-		exit (13);
-	snprintf(cp, len, "%s/%s", file, vendordir);
+	xasprintf(&cp, "%s/%s", file, vendordir);
 	vendordir = cp;
 #endif
 #else
@@ -470,18 +468,13 @@ void setdef_config_file (const char* file)
  * Loads the user-configured options from the default configuration file
  */
 
+#ifdef USE_ECONF
 static void def_load (void)
 {
-#ifdef USE_ECONF
 	econf_file *defs_file = NULL;
 	econf_err error;
 	char **keys;
 	size_t key_number;
-#else
-	int i;
-	FILE *fp;
-	char buf[1024], *name, *value, *s;
-#endif
 
 	/*
 	 * Set the initialized flag.
@@ -489,8 +482,6 @@ static void def_load (void)
 	 */
 	def_loaded = true;
 
-#ifdef USE_ECONF
-
 	error = econf_readDirs (&defs_file, vendordir, sysconfdir, "login", "defs", " \t", "#");
 	if (error) {
 		if (error == ECONF_NOFILE)
@@ -510,7 +501,12 @@ static void def_load (void)
 	for (size_t i = 0; i < key_number; i++) {
 		char *value;
 
-		econf_getStringValue(defs_file, NULL, keys[i], &value);
+		error = econf_getStringValue(defs_file, NULL, keys[i], &value);
+		if (error) {
+			SYSLOG ((LOG_CRIT, "failed reading key %zu from econf [%s]",
+				i, econf_errString(error)));
+			exit (EXIT_FAILURE);
+		}
 
 		/*
 		 * Store the value in def_table.
@@ -519,12 +515,27 @@ static void def_load (void)
 		 * The error was already reported to the user and to
 		 * syslog. The tools will just use their default values.
 		 */
-		(void)putdef_str (keys[i], value);
+		(void)putdef_str (keys[i], value, econf_getPath(defs_file));
+
+		free(value);
 	}
 
 	econf_free (keys);
 	econf_free (defs_file);
-#else
+}
+#else /* USE_ECONF */
+static void def_load (void)
+{
+	int i;
+	FILE *fp;
+	char buf[1024], *name, *value, *s;
+
+	/*
+	 * Set the initialized flag.
+	 * (do it early to prevent recursion in putdef_str())
+	 */
+	def_loaded = true;
+
 	/*
 	 * Open the configuration definitions file.
 	 */
@@ -542,12 +553,12 @@ static void def_load (void)
 	/*
 	 * Go through all of the lines in the file.
 	 */
-	while (fgets (buf, (int) sizeof (buf), fp) != NULL) {
+	while (fgets (buf, sizeof (buf), fp) != NULL) {
 
 		/*
 		 * Trim trailing whitespace.
 		 */
-		for (i = (int) strlen (buf) - 1; i >= 0; --i) {
+		for (i = (ptrdiff_t) strlen (buf) - 1; i >= 0; --i) {
 			if (!isspace (buf[i])) {
 				break;
 			}
@@ -577,7 +588,7 @@ static void def_load (void)
 		 * The error was already reported to the user and to
 		 * syslog. The tools will just use their default values.
 		 */
-		(void)putdef_str (name, value);
+		(void)putdef_str (name, value, def_fname);
 	}
 
 	if (ferror (fp) != 0) {
@@ -588,8 +599,8 @@ static void def_load (void)
 	}
 
 	(void) fclose (fp);
-#endif
 }
+#endif /* USE_ECONF */
 
 
 #ifdef CKDEFS
@@ -602,7 +613,7 @@ int main (int argc, char **argv)
 	def_load ();
 
 	for (i = 0; i < NUMDEFS; ++i) {
-		d = def_find (def_table[i].name);
+		d = def_find (def_table[i].name, NULL);
 		if (NULL == d) {
 			printf ("error - lookup '%s' failed\n",
 			        def_table[i].name);
diff --git a/lib/getdef.h b/lib/getdef.h
index 2bd3fc5..f55e28b 100644
--- a/lib/getdef.h
+++ b/lib/getdef.h
@@ -16,7 +16,7 @@ extern int getdef_num (const char *, int);
 extern unsigned long getdef_ulong (const char *, unsigned long);
 extern unsigned int getdef_unum (const char *, unsigned int);
 extern /*@observer@*/ /*@null@*/const char *getdef_str (const char *);
-extern int putdef_str (const char *, const char *);
+extern int putdef_str (const char *, const char *, const char *);
 extern void setdef_config_file (const char* file);
 
 /* default UMASK value if not specified in /etc/login.defs */
diff --git a/lib/getgr_nam_gid.c b/lib/getgr_nam_gid.c
new file mode 100644
index 0000000..fd0c217
--- /dev/null
+++ b/lib/getgr_nam_gid.c
@@ -0,0 +1,43 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2000 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdlib.h>
+#include <errno.h>
+#include <grp.h>
+#include "prototypes.h"
+
+/*
+ * getgr_nam_gid - Return a pointer to the group specified by a string.
+ * The string may be a valid GID or a valid groupname.
+ * If the group does not exist on the system, NULL is returned.
+ */
+extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname)
+{
+	char       *end;
+	long long  gid;
+
+	if (NULL == grname) {
+		return NULL;
+	}
+
+	errno = 0;
+	gid = strtoll(grname, &end, 10);
+	if (   ('\0' != *grname)
+	    && ('\0' == *end)
+	    && (0 == errno)
+	    && (/*@+longintegral@*/gid == (gid_t)gid)/*@=longintegral@*/) {
+		return xgetgrgid (gid);
+	}
+	return xgetgrnam (grname);
+}
+
diff --git a/lib/getlong.c b/lib/getlong.c
deleted file mode 100644
index ec4aa54..0000000
--- a/lib/getlong.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <config.h>
-
-#ident "$Id$"
-
-#include <stdlib.h>
-#include <errno.h>
-#include "prototypes.h"
-
-/*
- * getlong - extract a long integer provided by the numstr string in *result
- *
- * It supports decimal, hexadecimal or octal representations.
- *
- * Returns 0 on failure, 1 on success.
- */
-int getlong (const char *numstr, /*@out@*/long int *result)
-{
-	long val;
-	char *endptr;
-
-	errno = 0;
-	val = strtol (numstr, &endptr, 0);
-	if (('\0' == *numstr) || ('\0' != *endptr) || (ERANGE == errno)) {
-		return 0;
-	}
-
-	*result = val;
-	return 1;
-}
-
diff --git a/lib/getrange.c b/lib/getrange.c
new file mode 100644
index 0000000..466e908
--- /dev/null
+++ b/lib/getrange.c
@@ -0,0 +1,71 @@
+// SPDX-FileCopyrightText: 2008, Nicolas François
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#ident "$Id: $"
+
+#include <ctype.h>
+#include <stdlib.h>
+
+#include "atoi/a2i.h"
+#include "defines.h"
+#include "prototypes.h"
+
+
+/*
+ * Parse a range and indicate if the range is valid.
+ * Valid ranges are in the form:
+ *     <long>          -> min=max=long         has_min  has_max
+ *     -<long>         -> max=long            !has_min  has_max
+ *     <long>-         -> min=long             has_min !has_max
+ *     <long1>-<long2> -> min=long1 max=long2  has_min  has_max
+ */
+int
+getrange(const char *range,
+         unsigned long *min, bool *has_min,
+         unsigned long *max, bool *has_max)
+{
+	const char  *end;
+
+	if (NULL == range)
+		return -1;
+
+	*min = 0;
+	*has_min = false;
+	*has_max = false;
+
+	if ('-' == range[0]) {
+		end = range + 1;
+		goto parse_max;
+	}
+
+	if (a2ul(min, range, &end, 10, 0, ULONG_MAX) == -1 && errno != ENOTSUP)
+		return -1;
+	*has_min = true;
+
+	switch (*end++) {
+	case '\0':
+		*has_max = true;
+		*max = *min;
+		return 0;  /* <long> */
+
+	case '-':
+		if ('\0' == *end)
+			return 0;  /* <long>- */
+parse_max:
+		if (!isdigit((unsigned char) *end))
+			return -1;
+
+		if (a2ul(max, end, NULL, 10, *min, ULONG_MAX) == -1)
+			return -1;
+		*has_max = true;
+
+		return 0;  /* <long>-<long>, or -<long> */
+
+	default:
+		return -1;
+	}
+}
diff --git a/lib/gettime.c b/lib/gettime.c
new file mode 100644
index 0000000..c61c88c
--- /dev/null
+++ b/lib/gettime.c
@@ -0,0 +1,47 @@
+// SPDX-FileCopyrightText: 2017, Chris Lamb
+// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+
+#include "atoi/a2i.h"
+#include "defines.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+
+/*
+ * gettime() returns the time as the number of seconds since the Epoch
+ *
+ * Like time(), gettime() returns the time as the number of seconds since the
+ * Epoch, 1970-01-01 00:00:00 +0000 (UTC), except that if the SOURCE_DATE_EPOCH
+ * environment variable is exported it will use that instead.
+ */
+/*@observer@*/time_t
+gettime(void)
+{
+	char    *source_date_epoch;
+	FILE    *shadow_logfd = log_get_logfd();
+	time_t  fallback, epoch;
+
+	fallback = time (NULL);
+	source_date_epoch = shadow_getenv ("SOURCE_DATE_EPOCH");
+
+	if (!source_date_epoch)
+		return fallback;
+
+	if (a2i(time_t, &epoch, source_date_epoch, NULL, 10, 0, fallback) == -1) {
+		fprintf(shadow_logfd,
+		        _("Environment variable $SOURCE_DATE_EPOCH: a2i(\"%s\"): %s"),
+		        source_date_epoch, strerror(errno));
+		return fallback;
+	}
+	return epoch;
+}
diff --git a/lib/getulong.c b/lib/getulong.c
deleted file mode 100644
index 33250e3..0000000
--- a/lib/getulong.c
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <config.h>
-
-#ident "$Id: getlong.c 2763 2009-04-23 09:57:03Z nekral-guest $"
-
-#include <stdlib.h>
-#include <errno.h>
-#include "prototypes.h"
-
-/*
- * getulong - extract an unsigned long integer provided by the numstr string in *result
- *
- * It supports decimal, hexadecimal or octal representations.
- *
- * Returns 0 on failure, 1 on success.
- */
-int getulong (const char *numstr, /*@out@*/unsigned long int *result)
-{
-	unsigned long int val;
-	char *endptr;
-
-	errno = 0;
-	val = strtoul (numstr, &endptr, 0);
-	if (    ('\0' == *numstr)
-	     || ('\0' != *endptr)
-	     || (ERANGE == errno)
-	   ) {
-		return 0;
-	}
-
-	*result = val;
-	return 1;
-}
-
diff --git a/lib/groupio.c b/lib/groupio.c
index 357a30e..7b9d45f 100644
--- a/lib/groupio.c
+++ b/lib/groupio.c
@@ -15,12 +15,14 @@
 #include <assert.h>
 #include <stdio.h>
 
+#include "alloc.h"
 #include "prototypes.h"
 #include "defines.h"
 #include "commonio.h"
 #include "getdef.h"
 #include "groupio.h"
 
+
 static /*@null@*/struct commonio_entry *merge_group_entries (
 	/*@null@*/ /*@returned@*/struct commonio_entry *gr1,
 	/*@null@*/struct commonio_entry *gr2);
@@ -34,7 +36,8 @@ static /*@null@*/ /*@only@*/void *group_dup (const void *ent)
 	return __gr_dup (gr);
 }
 
-static void group_free (/*@out@*/ /*@only@*/void *ent)
+static void
+group_free(/*@only@*/void *ent)
 {
 	struct group *gr = ent;
 
@@ -50,7 +53,7 @@ static const char *group_getname (const void *ent)
 
 static void *group_parse (const char *line)
 {
-	return (void *) sgetgrent (line);
+	return sgetgrent (line);
 }
 
 static int group_put (const void *ent, FILE * file)
@@ -159,7 +162,7 @@ int gr_open (int mode)
 
 int gr_update (const struct group *gr)
 {
-	return commonio_update (&group_db, (const void *) gr);
+	return commonio_update (&group_db, gr);
 }
 
 int gr_remove (const char *name)
@@ -209,17 +212,25 @@ void __gr_del_entry (const struct commonio_entry *ent)
 
 static int gr_cmp (const void *p1, const void *p2)
 {
+	const struct commonio_entry *const *ce1;
+	const struct commonio_entry *const *ce2;
+	const struct group *g1, *g2;
 	gid_t u1, u2;
 
-	if ((*(struct commonio_entry **) p1)->eptr == NULL) {
+	ce1 = p1;
+	g1 = (*ce1)->eptr;
+	if (g1 == NULL) {
 		return 1;
 	}
-	if ((*(struct commonio_entry **) p2)->eptr == NULL) {
+
+	ce2 = p2;
+	g2 = (*ce2)->eptr;
+	if (g2 == NULL) {
 		return -1;
 	}
 
-	u1 = ((struct group *) (*(struct commonio_entry **) p1)->eptr)->gr_gid;
-	u2 = ((struct group *) (*(struct commonio_entry **) p2)->eptr)->gr_gid;
+	u1 = g1->gr_gid;
+	u2 = g2->gr_gid;
 
 	if (u1 < u2) {
 		return -1;
@@ -247,8 +258,8 @@ static int group_open_hook (void)
 
 	for (gr1 = group_db.head; NULL != gr1; gr1 = gr1->next) {
 		for (gr2 = gr1->next; NULL != gr2; gr2 = gr2->next) {
-			struct group *g1 = (struct group *)gr1->eptr;
-			struct group *g2 = (struct group *)gr2->eptr;
+			struct group *g1 = gr1->eptr;
+			struct group *g2 = gr2->eptr;
 			if (NULL != g1 &&
 			    NULL != g2 &&
 			    0 == strcmp (g1->gr_name, g2->gr_name) &&
@@ -291,32 +302,28 @@ static /*@null@*/struct commonio_entry *merge_group_entries (
 	/*@null@*/ /*@returned@*/struct commonio_entry *gr1,
 	/*@null@*/struct commonio_entry *gr2)
 {
-	struct group *gptr1;
-	struct group *gptr2;
-	char **new_members;
-	size_t members = 0;
-	char *new_line;
-	size_t new_line_len, i;
+	char          *new_line;
+	char          **new_members;
+	size_t        i;
+	size_t        members = 0;
+	struct group  *gptr1;
+	struct group  *gptr2;
+
 	if (NULL == gr2 || NULL == gr1) {
 		errno = EINVAL;
 		return NULL;
 	}
 
-	gptr1 = (struct group *)gr1->eptr;
-	gptr2 = (struct group *)gr2->eptr;
+	gptr1 = gr1->eptr;
+	gptr2 = gr2->eptr;
 	if (NULL == gptr2 || NULL == gptr1) {
 		errno = EINVAL;
 		return NULL;
 	}
 
 	/* Concatenate the 2 lines */
-	new_line_len = strlen (gr1->line) + strlen (gr2->line) +1;
-	new_line = (char *)malloc (new_line_len + 1);
-	if (NULL == new_line) {
-		errno = ENOMEM;
+	if (asprintf(&new_line, "%s\n%s", gr1->line, gr2->line) == -1)
 		return NULL;
-	}
-	snprintf(new_line, new_line_len + 1, "%s\n%s", gr1->line, gr2->line);
 
 	/* Concatenate the 2 list of members */
 	for (i=0; NULL != gptr1->gr_mem[i]; i++);
@@ -333,10 +340,9 @@ static /*@null@*/struct commonio_entry *merge_group_entries (
 			members++;
 		}
 	}
-	new_members = (char **)calloc ( (members+1), sizeof(char*) );
+	new_members = CALLOC (members + 1, char *);
 	if (NULL == new_members) {
-		free (new_line);
-		errno = ENOMEM;
+		free(new_line);
 		return NULL;
 	}
 	for (i=0; NULL != gptr1->gr_mem[i]; i++) {
@@ -377,7 +383,7 @@ static int split_groups (unsigned int max_members)
 	struct commonio_entry *gr;
 
 	for (gr = group_db.head; NULL != gr; gr = gr->next) {
-		struct group *gptr = (struct group *)gr->eptr;
+		struct group *gptr = gr->eptr;
 		struct commonio_entry *new;
 		struct group *new_gptr;
 		unsigned int members = 0;
@@ -395,9 +401,8 @@ static int split_groups (unsigned int max_members)
 			continue;
 		}
 
-		new = (struct commonio_entry *) malloc (sizeof *new);
+		new = MALLOC(1, struct commonio_entry);
 		if (NULL == new) {
-			errno = ENOMEM;
 			return 0;
 		}
 		new->eptr = group_dup(gr->eptr);
@@ -406,7 +411,7 @@ static int split_groups (unsigned int max_members)
 			errno = ENOMEM;
 			return 0;
 		}
-		new_gptr = (struct group *)new->eptr;
+		new_gptr = new->eptr;
 		new->line = NULL;
 		new->changed = true;
 
diff --git a/lib/groupmem.c b/lib/groupmem.c
index c858b72..69d4435 100644
--- a/lib/groupmem.c
+++ b/lib/groupmem.c
@@ -12,6 +12,8 @@
 
 #ident "$Id$"
 
+#include "alloc.h"
+#include "memzero.h"
 #include "prototypes.h"
 #include "defines.h"
 #include "groupio.h"
@@ -21,12 +23,11 @@
 	struct group *gr;
 	int i;
 
-	gr = (struct group *) malloc (sizeof *gr);
+	gr = CALLOC(1, struct group);
 	if (NULL == gr) {
 		return NULL;
 	}
 	/* The libc might define other fields. They won't be copied. */
-	memset (gr, 0, sizeof *gr);
 	gr->gr_gid = grent->gr_gid;
 	/*@-mustfreeonly@*/
 	gr->gr_name = strdup (grent->gr_name);
@@ -46,7 +47,7 @@
 	for (i = 0; grent->gr_mem[i]; i++);
 
 	/*@-mustfreeonly@*/
-	gr->gr_mem = (char **) malloc ((i + 1) * sizeof (char *));
+	gr->gr_mem = MALLOC(i + 1, char *);
 	/*@=mustfreeonly@*/
 	if (NULL == gr->gr_mem) {
 		gr_free(gr);
@@ -76,7 +77,8 @@ void gr_free_members (struct group *grent)
 	}
 }
 
-void gr_free (/*@out@*/ /*@only@*/struct group *grent)
+void
+gr_free(/*@only@*/struct group *grent)
 {
 	free (grent->gr_name);
 	if (NULL != grent->gr_passwd) {
@@ -86,33 +88,3 @@ void gr_free (/*@out@*/ /*@only@*/struct group *grent)
 	gr_free_members(grent);
 	free (grent);
 }
-
-bool gr_append_member(struct group *grp, char *member)
-{
-	int i;
-
-	if (NULL == grp->gr_mem || grp->gr_mem[0] == NULL) {
-		grp->gr_mem = (char **)malloc(2 * sizeof(char *));
-		if (!grp->gr_mem) {
-			return false;
-		}
-		grp->gr_mem[0] = strdup(member);
-		if (!grp->gr_mem[0]) {
-			return false;
-		}
-		grp->gr_mem[1] = NULL;
-		return true;
-	}
-
-	for (i = 0; grp->gr_mem[i]; i++) ;
-	grp->gr_mem = realloc(grp->gr_mem, (i + 2) * sizeof(char *));
-	if (NULL == grp->gr_mem) {
-		return false;
-	}
-	grp->gr_mem[i] = strdup(member);
-	if (NULL == grp->gr_mem[i]) {
-		return false;
-	}
-	grp->gr_mem[i + 1] = NULL;
-	return true;
-}
diff --git a/lib/gshadow.c b/lib/gshadow.c
index 2e12923..3c71bea 100644
--- a/lib/gshadow.c
+++ b/lib/gshadow.c
@@ -15,8 +15,12 @@
 #ident "$Id$"
 
 #include <stdio.h>
+#include <string.h>
+
+#include "alloc.h"
 #include "prototypes.h"
 #include "defines.h"
+
 static /*@null@*/FILE *shadow;
 static /*@null@*//*@only@*/char **members = NULL;
 static size_t nmembers = 0;
@@ -26,34 +30,6 @@ static struct sgrp sgroup;
 
 #define	FIELDS	4
 
-#ifdef	USE_NIS
-static bool nis_used;
-static bool nis_ignore;
-static enum { native, start, middle, native2 } nis_state;
-static bool nis_bound;
-static char *nis_domain;
-static char *nis_key;
-static int nis_keylen;
-static char *nis_val;
-static int nis_vallen;
-
-#define	IS_NISCHAR(c) ((c)=='+')
-#endif
-
-#ifdef	USE_NIS
-/*
- * bind_nis - bind to NIS server
- */
-
-static int bind_nis (void)
-{
-	if (yp_get_default_domain (&nis_domain))
-		return -1;
-
-	nis_bound = true;
-	return 0;
-}
-#endif
 
 static /*@null@*/char **build_list (char *s, char **list[], size_t * nlist)
 {
@@ -62,21 +38,16 @@ static /*@null@*/char **build_list (char *s, char **list[], size_t * nlist)
 
 	while (s != NULL && *s != '\0') {
 		size = (nelem + 1) * sizeof (ptr);
-		ptr = realloc (*list, size);
+		ptr = REALLOC(*list, size, char *);
 		if (NULL != ptr) {
-			ptr[nelem] = s;
+			ptr[nelem] = strsep(&s, ",");
 			nelem++;
 			*list = ptr;
 			*nlist = nelem;
-			s = strchr (s, ',');
-			if (NULL != s) {
-				*s = '\0';
-				s++;
-			}
 		}
 	}
 	size = (nelem + 1) * sizeof (ptr);
-	ptr = realloc (*list, size);
+	ptr = REALLOC(*list, size, char *);
 	if (NULL != ptr) {
 		ptr[nelem] = NULL;
 		*list = ptr;
@@ -86,9 +57,6 @@ static /*@null@*/char **build_list (char *s, char **list[], size_t * nlist)
 
 void setsgent (void)
 {
-#ifdef	USE_NIS
-	nis_state = native;
-#endif
 	if (NULL != shadow) {
 		rewind (shadow);
 	} else {
@@ -102,7 +70,7 @@ void endsgent (void)
 		(void) fclose (shadow);
 	}
 
-	shadow = (FILE *) 0;
+	shadow = NULL;
 }
 
 /*@observer@*//*@null@*/struct sgrp *sgetsgent (const char *string)
@@ -116,7 +84,7 @@ void endsgent (void)
 	size_t len = strlen (string) + 1;
 
 	if (len > sgrbuflen) {
-		char *buf = (char *) realloc (sgrbuf, sizeof (char) * len);
+		char *buf = REALLOC(sgrbuf, len, char);
 		if (NULL == buf) {
 			return NULL;
 		}
@@ -124,8 +92,7 @@ void endsgent (void)
 		sgrbuflen = len;
 	}
 
-	strncpy (sgrbuf, string, len);
-	sgrbuf[len-1] = '\0';
+	strcpy (sgrbuf, string);
 
 	cp = strrchr (sgrbuf, '\n');
 	if (NULL != cp) {
@@ -137,30 +104,16 @@ void endsgent (void)
 	 * all 4 of them and save the starting addresses in fields[].
 	 */
 
-	for (cp = sgrbuf, i = 0; (i < FIELDS) && (NULL != cp); i++) {
-		fields[i] = cp;
-		cp = strchr (cp, ':');
-		if (NULL != cp) {
-			*cp++ = '\0';
-		}
-	}
+	for (cp = sgrbuf, i = 0; (i < FIELDS) && (NULL != cp); i++)
+		fields[i] = strsep(&cp, ":");
 
 	/*
 	 * If there was an extra field somehow, or perhaps not enough,
 	 * the line is invalid.
 	 */
 
-	if ((NULL != cp) || (i != FIELDS)) {
-#ifdef	USE_NIS
-		if (!IS_NISCHAR (fields[0][0])) {
-			return 0;
-		} else {
-			nis_used = true;
-		}
-#else
+	if (NULL != cp || i != FIELDS)
 		return 0;
-#endif
-	}
 
 	sgroup.sg_name = fields[0];
 	sgroup.sg_passwd = fields[1];
@@ -195,7 +148,7 @@ void endsgent (void)
 	char *cp;
 
 	if (0 == buflen) {
-		buf = (char *) malloc (BUFSIZ);
+		buf = MALLOC(BUFSIZ, char);
 		if (NULL == buf) {
 			return NULL;
 		}
@@ -206,17 +159,12 @@ void endsgent (void)
 		return NULL;
 	}
 
-#ifdef	USE_NIS
-	while (fgetsx (buf, (int) buflen, fp) == buf)
-#else
-	if (fgetsx (buf, (int) buflen, fp) == buf)
-#endif
-	{
+	if (fgetsx(buf, buflen, fp) == buf) {
 		while (   ((cp = strrchr (buf, '\n')) == NULL)
 		       && (feof (fp) == 0)) {
 			size_t len;
 
-			cp = (char *) realloc (buf, buflen*2);
+			cp = REALLOC(buf, buflen * 2, char);
 			if (NULL == cp) {
 				return NULL;
 			}
@@ -234,11 +182,6 @@ void endsgent (void)
 		if (NULL != cp) {
 			*cp = '\0';
 		}
-#ifdef	USE_NIS
-		if (nis_ignore && IS_NISCHAR (buf[0])) {
-			continue;
-		}
-#endif
 		return (sgetsgent (buf));
 	}
 	return NULL;
@@ -250,96 +193,10 @@ void endsgent (void)
 
 /*@observer@*//*@null@*/struct sgrp *getsgent (void)
 {
-#ifdef	USE_NIS
-	bool nis_1_group = false;
-	struct sgrp *val;
-#endif
 	if (NULL == shadow) {
 		setsgent ();
 	}
-
-#ifdef	USE_NIS
-      again:
-	/*
-	 * See if we are reading from the local file.
-	 */
-
-	if (nis_state == native || nis_state == native2) {
-
-		/*
-		 * Get the next entry from the shadow group file.  Return
-		 * NULL right away if there is none.
-		 */
-
-		val = fgetsgent (shadow);
-		if (NULL == val) {
-			return 0;
-		}
-
-		/*
-		 * If this entry began with a NIS escape character, we have
-		 * to see if this is just a single group, or if the entire
-		 * map is being asked for.
-		 */
-
-		if (IS_NISCHAR (val->sg_name[0])) {
-			if ('\0' != val->sg_name[1]) {
-				nis_1_group = true;
-			} else {
-				nis_state = start;
-			}
-		}
-
-		/*
-		 * If this isn't a NIS group and this isn't an escape to go
-		 * use a NIS map, it must be a regular local group.
-		 */
-
-		if (!nis_1_group && (nis_state != start)) {
-			return val;
-		}
-
-		/*
-		 * If this is an escape to use an NIS map, switch over to
-		 * that bunch of code.
-		 */
-
-		if (nis_state == start) {
-			goto again;
-		}
-
-		/*
-		 * NEEDSWORK.  Here we substitute pieces-parts of this entry.
-		 */
-
-		return 0;
-	} else {
-		if (!nis_bound) {
-			if (bind_nis ()) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		if (nis_state == start) {
-			if (yp_first (nis_domain, "gshadow.byname", &nis_key,
-				      &nis_keylen, &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-			nis_state = middle;
-		} else if (nis_state == middle) {
-			if (yp_next (nis_domain, "gshadow.byname", nis_key,
-				     nis_keylen, &nis_key, &nis_keylen,
-				     &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		return sgetsgent (nis_val);
-	}
-#else
 	return (fgetsgent (shadow));
-#endif
 }
 
 /*
@@ -350,63 +207,13 @@ void endsgent (void)
 {
 	struct sgrp *sgrp;
 
-#ifdef	USE_NIS
-	static char save_name[16];
-	int nis_disabled = 0;
-#endif
-
 	setsgent ();
 
-#ifdef	USE_NIS
-	if (nis_used) {
-	      again:
-
-		/*
-		 * Search the gshadow.byname map for this group.
-		 */
-
-		if (!nis_bound) {
-			bind_nis ();
-		}
-
-		if (nis_bound) {
-			char *cp;
-
-			if (yp_match (nis_domain, "gshadow.byname", name,
-				      strlen (name), &nis_val,
-				      &nis_vallen) == 0) {
-				cp = strchr (nis_val, '\n');
-				if (NULL != cp) {
-					*cp = '\0';
-				}
-
-				nis_state = middle;
-				sgrp = sgetsgent (nis_val);
-				if (NULL != sgrp) {
-					strcpy (save_name, sgrp->sg_name);
-					nis_key = save_name;
-					nis_keylen = strlen (save_name);
-				}
-				return sgrp;
-			}
-		}
-		nis_state = native2;
-	}
-#endif
-#ifdef	USE_NIS
-	if (nis_used) {
-		nis_ignore = true;
-		nis_disabled = true;
-	}
-#endif
-	while ((sgrp = getsgent ()) != (struct sgrp *) 0) {
+	while ((sgrp = getsgent ()) != NULL) {
 		if (strcmp (name, sgrp->sg_name) == 0) {
 			break;
 		}
 	}
-#ifdef	USE_NIS
-	nis_ignore = false;
-#endif
 	return sgrp;
 }
 
@@ -437,7 +244,7 @@ int putsgent (const struct sgrp *sgrp, FILE * fp)
 		size += strlen (sgrp->sg_mem[i]) + 1;
 	}
 
-	buf = malloc (size);
+	buf = MALLOC(size, char);
 	if (NULL == buf) {
 		return -1;
 	}
@@ -502,5 +309,5 @@ int putsgent (const struct sgrp *sgrp, FILE * fp)
 	return 0;
 }
 #else
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/*} SHADOWGRP */
diff --git a/lib/hushed.c b/lib/hushed.c
new file mode 100644
index 0000000..86c224f
--- /dev/null
+++ b/lib/hushed.c
@@ -0,0 +1,80 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1993, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1991 - 1993, Chip Rosenthal
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <stdio.h>
+#include <pwd.h>
+#include "defines.h"
+#include "prototypes.h"
+#include "getdef.h"
+#include "string/sprintf.h"
+
+
+/*
+ * hushed - determine if a user receives login messages
+ *
+ * Look in the hushed-logins file (or user's home directory) to see
+ * if the user is to receive the login-time messages.
+ */
+bool hushed (const char *username)
+{
+	bool           found;
+	char           buf[BUFSIZ];
+	FILE           *fp;
+	const char     *hushfile;
+	struct passwd  *pw;
+
+	/*
+	 * Get the name of the file to use.  If this option is not
+	 * defined, default to a noisy login.
+	 */
+
+	hushfile = getdef_str ("HUSHLOGIN_FILE");
+	if (NULL == hushfile) {
+		return false;
+	}
+
+	pw = getpwnam (username);
+	if (NULL == pw) {
+		return false;
+	}
+
+	/*
+	 * If this is not a fully rooted path then see if the
+	 * file exists in the user's home directory.
+	 */
+
+	if (hushfile[0] != '/') {
+		SNPRINTF(buf, "%s/%s", pw->pw_dir, hushfile);
+		return (access (buf, F_OK) == 0);
+	}
+
+	/*
+	 * If this is a fully rooted path then go through the file
+	 * and see if this user, or its shell is in there.
+	 */
+
+	fp = fopen (hushfile, "r");
+	if (NULL == fp) {
+		return false;
+	}
+	for (found = false; !found && (fgets (buf, sizeof buf, fp) == buf);) {
+		buf[strcspn (buf, "\n")] = '\0';
+		found = (strcmp (buf, pw->pw_shell) == 0) ||
+		        (strcmp (buf, pw->pw_name) == 0);
+	}
+	(void) fclose (fp);
+	return found;
+}
+
diff --git a/lib/idmapping.c b/lib/idmapping.c
new file mode 100644
index 0000000..56c72ea
--- /dev/null
+++ b/lib/idmapping.c
@@ -0,0 +1,224 @@
+/*
+ * SPDX-FileCopyrightText: 2013 Eric Biederman
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <strings.h>
+
+#include "alloc.h"
+#include "atoi/str2i.h"
+#include "prototypes.h"
+#include "string/stpeprintf.h"
+#include "idmapping.h"
+#if HAVE_SYS_CAPABILITY_H
+#include <sys/prctl.h>
+#include <sys/capability.h>
+#endif
+#include "shadowlog.h"
+#include "sizeof.h"
+
+
+struct map_range *get_map_ranges(int ranges, int argc, char **argv)
+{
+	struct map_range *mappings, *mapping;
+	int idx, argidx;
+
+	if (ranges < 0 || argc < 0) {
+		fprintf(log_get_logfd(), "%s: error calculating number of arguments\n", log_get_progname());
+		return NULL;
+	}
+
+	if (ranges * 3 != argc) {
+		fprintf(log_get_logfd(), "%s: ranges: %u is wrong for argc: %d\n", log_get_progname(), ranges, argc);
+		return NULL;
+	}
+
+	mappings = CALLOC(ranges, struct map_range);
+	if (!mappings) {
+		fprintf(log_get_logfd(), _( "%s: Memory allocation failure\n"),
+			log_get_progname());
+		exit(EXIT_FAILURE);
+	}
+
+	/* Gather up the ranges from the command line */
+	mapping = mappings;
+	for (idx = 0, argidx = 0; idx < ranges; idx++, argidx += 3, mapping++) {
+		if (str2ul(&mapping->upper, argv[argidx + 0]) == -1) {
+			free(mappings);
+			return NULL;
+		}
+		if (str2ul(&mapping->lower, argv[argidx + 1]) == -1) {
+			free(mappings);
+			return NULL;
+		}
+		if (str2ul(&mapping->count, argv[argidx + 2]) == -1) {
+			free(mappings);
+			return NULL;
+		}
+		if (ULONG_MAX - mapping->upper <= mapping->count || ULONG_MAX - mapping->lower <= mapping->count) {
+			fprintf(log_get_logfd(), _( "%s: subuid overflow detected.\n"), log_get_progname());
+			exit(EXIT_FAILURE);
+		}
+		if (mapping->upper > UINT_MAX ||
+			mapping->lower > UINT_MAX ||
+			mapping->count > UINT_MAX)  {
+			fprintf(log_get_logfd(), _( "%s: subuid overflow detected.\n"), log_get_progname());
+			exit(EXIT_FAILURE);
+		}
+		if (mapping->lower + mapping->count > UINT_MAX ||
+				mapping->upper + mapping->count > UINT_MAX) {
+			fprintf(log_get_logfd(), _( "%s: subuid overflow detected.\n"), log_get_progname());
+			exit(EXIT_FAILURE);
+		}
+		if (mapping->lower + mapping->count < mapping->lower ||
+				mapping->upper + mapping->count < mapping->upper) {
+			/* this one really shouldn't be possible given previous checks */
+			fprintf(log_get_logfd(), _( "%s: subuid overflow detected.\n"), log_get_progname());
+			exit(EXIT_FAILURE);
+		}
+	}
+	return mappings;
+}
+
+/* Number of ascii digits needed to print any unsigned long in decimal.
+ * There are approximately 10 bits for every 3 decimal digits.
+ * So from bits to digits the formula is roundup((Number of bits)/10) * 3.
+ * For common sizes of integers this works out to:
+ *  2bytes -->  6 ascii estimate  -> 65536  (5 real)
+ *  4bytes --> 12 ascii estimated -> 4294967296 (10 real)
+ *  8bytes --> 21 ascii estimated -> 18446744073709551616 (20 real)
+ * 16bytes --> 39 ascii estimated -> 340282366920938463463374607431768211456 (39 real)
+ */
+#define ULONG_DIGITS (((WIDTHOF(unsigned long) + 9)/10)*3)
+
+#if HAVE_SYS_CAPABILITY_H
+static inline bool maps_lower_root(int cap, int ranges, const struct map_range *mappings)
+{
+	int idx;
+	const struct map_range *mapping;
+
+	if (cap != CAP_SETUID)
+		return false;
+
+	mapping = mappings;
+	for (idx = 0; idx < ranges; idx++, mapping++) {
+		if (mapping->lower == 0)
+			return true;
+	}
+
+	return false;
+}
+#endif
+
+/*
+ * The ruid refers to the caller's uid and is used to reset the effective uid
+ * back to the callers real uid.
+ * This clutch mainly exists for setuid-based new{g,u}idmap binaries that are
+ * called in contexts where all capabilities other than the necessary
+ * CAP_SET{G,U}ID capabilities are dropped. Since the kernel will require
+ * assurance that the caller holds CAP_SYS_ADMIN over the target user namespace
+ * the only way it can confirm is in this case is if the effective uid is
+ * equivalent to the uid owning the target user namespace.
+ * Note, we only support this when a) new{g,u}idmap is not called by root and
+ * b) if the caller's uid and the uid retrieved via system appropriate means
+ * (shadow file or other) are identical. Specifically, this does not support
+ * when the root user calls the new{g,u}idmap binary for an unprivileged user.
+ * If this is wanted: use file capabilities!
+ */
+void write_mapping(int proc_dir_fd, int ranges, const struct map_range *mappings,
+	const char *map_file, uid_t ruid)
+{
+	int idx;
+	const struct map_range *mapping;
+	size_t bufsize;
+	char *buf, *pos, *end;
+	int fd;
+
+#if HAVE_SYS_CAPABILITY_H
+	int cap;
+	struct __user_cap_header_struct hdr = {_LINUX_CAPABILITY_VERSION_3, 0};
+	struct __user_cap_data_struct data[2] = {{0}};
+
+	if (strcmp(map_file, "uid_map") == 0) {
+		cap = CAP_SETUID;
+	} else if (strcmp(map_file, "gid_map") == 0) {
+		cap = CAP_SETGID;
+	} else {
+		fprintf(log_get_logfd(), _("%s: Invalid map file %s specified\n"), log_get_progname(), map_file);
+		exit(EXIT_FAILURE);
+	}
+
+	/* Align setuid- and fscaps-based new{g,u}idmap behavior. */
+	if (geteuid() == 0 && geteuid() != ruid) {
+		if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0) < 0) {
+			fprintf(log_get_logfd(), _("%s: Could not prctl(PR_SET_KEEPCAPS)\n"), log_get_progname());
+			exit(EXIT_FAILURE);
+		}
+
+		if (seteuid(ruid) < 0) {
+			fprintf(log_get_logfd(), _("%s: Could not seteuid to %d\n"), log_get_progname(), ruid);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	/* Lockdown new{g,u}idmap by dropping all unneeded capabilities. */
+	bzero(data, sizeof(data));
+	data[0].effective = CAP_TO_MASK(cap);
+	/*
+	 * When uid 0 from the ancestor userns is supposed to be mapped into
+	 * the child userns we need to retain CAP_SETFCAP.
+	 */
+	if (maps_lower_root(cap, ranges, mappings))
+		data[0].effective |= CAP_TO_MASK(CAP_SETFCAP);
+	data[0].permitted = data[0].effective;
+	if (capset(&hdr, data) < 0) {
+		fprintf(log_get_logfd(), _("%s: Could not set caps\n"), log_get_progname());
+		exit(EXIT_FAILURE);
+	}
+#endif
+
+	bufsize = (ULONG_DIGITS + 1) * 3 * ranges + 1;
+	pos = buf = XMALLOC(bufsize, char);
+	end = buf + bufsize;
+
+	/* Build the mapping command */
+	mapping = mappings;
+	for (idx = 0; idx < ranges; idx++, mapping++) {
+		/* Append this range to the string that will be written */
+		pos = stpeprintf(pos, end, "%lu %lu %lu\n",
+		                 mapping->upper,
+		                 mapping->lower,
+		                 mapping->count);
+	}
+	if (pos == end || pos == NULL) {
+		fprintf(log_get_logfd(), _("%s: stpeprintf failed!\n"), log_get_progname());
+		exit(EXIT_FAILURE);
+	}
+
+	/* Write the mapping to the mapping file */
+	fd = openat(proc_dir_fd, map_file, O_WRONLY);
+	if (fd < 0) {
+		fprintf(log_get_logfd(), _("%s: open of %s failed: %s\n"),
+			log_get_progname(), map_file, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (write_full(fd, buf, pos - buf) == -1) {
+		fprintf(log_get_logfd(), _("%s: write to %s failed: %s\n"),
+			log_get_progname(), map_file, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	if (close(fd) != 0 && errno != EINTR) {
+		fprintf(log_get_logfd(), _("%s: closing %s failed: %s\n"),
+			log_get_progname(), map_file, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	free(buf);
+}
diff --git a/lib/idmapping.h b/lib/idmapping.h
new file mode 100644
index 0000000..46d4631
--- /dev/null
+++ b/lib/idmapping.h
@@ -0,0 +1,23 @@
+/*
+ * SPDX-FileCopyrightText: 2013 Eric Biederman
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _IDMAPPING_H_
+#define _IDMAPPING_H_
+
+#include <sys/types.h>
+
+struct map_range {
+	unsigned long upper; /* first ID inside the namespace */
+	unsigned long lower; /* first ID outside the namespace */
+	unsigned long count; /* Length of the inside and outside ranges */
+};
+
+extern struct map_range *get_map_ranges(int ranges, int argc, char **argv);
+extern void write_mapping(int proc_dir_fd, int ranges,
+	const struct map_range *mappings, const char *map_file, uid_t ruid);
+
+#endif /* _ID_MAPPING_H_ */
+
diff --git a/lib/isexpired.c b/lib/isexpired.c
new file mode 100644
index 0000000..c275691
--- /dev/null
+++ b/lib/isexpired.c
@@ -0,0 +1,105 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Extracted from age.c and made part of libshadow.a - may be useful
+ * in other shadow-aware programs.  --marekm
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <pwd.h>
+#include <time.h>
+
+#include "adds.h"
+#include "defines.h"
+#include "prototypes.h"
+
+#ident "$Id$"
+
+
+/*
+ * isexpired - determine if account is expired yet
+ *
+ *	isexpired calculates the expiration date based on the
+ *	password expiration criteria.
+ *
+ * Return value:
+ *	0: The password is still valid
+ *	1: The password has expired, it must be changed
+ *	2: The password has expired since a long time and the account is
+ *	   now disabled. (password cannot be changed)
+ *	3: The account has expired
+ */
+int isexpired (const struct passwd *pw, /*@null@*/const struct spwd *sp)
+{
+	long  now;
+
+	now = time(NULL) / DAY;
+
+	if (NULL == sp) {
+		return 0;
+	}
+
+	/*
+	 * Quick and easy - there is an expired account field
+	 * along with an inactive account field.  Do the expired
+	 * one first since it is worse.
+	 */
+
+	if ((sp->sp_expire > 0) && (now >= sp->sp_expire)) {
+		return 3;
+	}
+
+	/*
+	 * Last changed date 1970-01-01 (not very likely) means that
+	 * the password must be changed on next login (passwd -e).
+	 *
+	 * The check for "x" is a workaround for RedHat NYS libc bug -
+	 * if /etc/shadow doesn't exist, getspnam() still succeeds and
+	 * returns sp_lstchg==0 (must change password) instead of -1!
+	 */
+	if (   (0 == sp->sp_lstchg)
+	    && (strcmp (pw->pw_passwd, SHADOW_PASSWD_STRING) == 0)) {
+		return 1;
+	}
+
+	if (   (sp->sp_lstchg > 0)
+	    && (sp->sp_max >= 0)
+	    && (sp->sp_inact >= 0)
+	    && (now >= addsl(sp->sp_lstchg, sp->sp_max, sp->sp_inact)))
+	{
+		return 2;
+	}
+
+	/*
+	 * The last and max fields must be present for an account
+	 * to have an expired password.  A maximum of >10000 days
+	 * is considered to be infinite.
+	 */
+
+	if (   (-1 == sp->sp_lstchg)
+	    || (-1 == sp->sp_max)
+	    || (sp->sp_max >= 10000)) {
+		return 0;
+	}
+
+	/*
+	 * Calculate today's day and the day on which the password
+	 * is going to expire.  If that date has already passed,
+	 * the password has expired.
+	 */
+
+	if (now >= addsl(sp->sp_lstchg, sp->sp_max))
+		return 1;
+
+	return 0;
+}
+
diff --git a/lib/limits.c b/lib/limits.c
new file mode 100644
index 0000000..813c082
--- /dev/null
+++ b/lib/limits.c
@@ -0,0 +1,537 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Separated from setup.c.  --marekm
+ * Resource limits thanks to Cristian Gafton.
+ * Enhancements of resource limit code by Thomas Orgis <thomas@orgis.org>
+ */
+
+#include <config.h>
+
+#ifndef USE_PAM
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <ctype.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+#include "getdef.h"
+#include "shadowlog.h"
+#include <sys/resource.h>
+
+#include "atoi/str2i.h"
+#include "memzero.h"
+
+
+#ifndef LIMITS_FILE
+#define LIMITS_FILE "/etc/limits"
+#endif
+#define LOGIN_ERROR_RLIMIT	1
+#define LOGIN_ERROR_LOGIN	2
+/* Set a limit on a resource */
+/*
+ *	rlimit - RLIMIT_XXXX
+ *	value - string value to be read
+ *	multiplier - value*multiplier is the actual limit
+ */
+static int setrlimit_value (unsigned int resource,
+                            const char *value,
+                            unsigned int multiplier)
+{
+	char           *end;
+	long           l;
+	rlim_t         limit;
+	struct rlimit  rlim;
+
+	/* The "-" is special, not belonging to a strange negative limit.
+	 * It is infinity, in a controlled way.
+	 */
+	if ('-' == value[0]) {
+		limit = RLIM_INFINITY;
+	}
+	else {
+		/* We cannot use str2sl() here because it fails when there
+		 * is more to the value than just this number!
+		 * Also, we are limited to base 10 here (hex numbers will not
+		 * work with the limit string parser as is anyway)
+		 */
+		errno = 0;
+		l = strtol(value, &end, 10);
+
+		if (value == end || errno != 0)
+			return 0;  // FIXME: We could instead throw an error, though.
+
+		if (__builtin_mul_overflow(l, multiplier, &limit)) {
+			/* FIXME: Again, silent error handling...
+			 * Wouldn't screaming make more sense?
+			 */
+			return 0;
+		}
+	}
+
+	rlim.rlim_cur = limit;
+	rlim.rlim_max = limit;
+	if (setrlimit (resource, &rlim) != 0) {
+		return LOGIN_ERROR_RLIMIT;
+	}
+	return 0;
+}
+
+
+static int set_prio (const char *value)
+{
+	long prio;
+
+	if (   (str2sl(&prio, value) == -1)
+	    || (prio != (int) prio)) {
+		return 0;
+	}
+	if (setpriority (PRIO_PROCESS, 0, prio) != 0) {
+		return LOGIN_ERROR_RLIMIT;
+	}
+	return 0;
+}
+
+
+static int set_umask (const char *value)
+{
+	unsigned long  mask;
+
+	if (   (str2ul(&mask, value) == -1)
+	    || (mask != (mode_t) mask)) {
+		return 0;
+	}
+
+	(void) umask (mask);
+	return 0;
+}
+
+
+/* Counts the number of user logins and check against the limit */
+static int check_logins (const char *name, const char *maxlogins)
+{
+	unsigned long limit, count;
+
+	if (str2ul(&limit, maxlogins) == -1) {
+		return 0;
+	}
+
+	if (0 == limit) {	/* maximum 0 logins ? */
+		SYSLOG ((LOG_WARN, "No logins allowed for `%s'\n", name));
+		return LOGIN_ERROR_LOGIN;
+	}
+
+	count = active_sessions_count(name, limit);
+
+	if (count > limit) {
+		SYSLOG ((LOG_WARN,
+		         "Too many logins (max %lu) for %s\n",
+		         limit, name));
+		return LOGIN_ERROR_LOGIN;
+	}
+	return 0;
+}
+
+/* Function setup_user_limits - checks/set limits for the current login
+ * Original idea from Joel Katz's lshell. Ported to shadow-login
+ * by Cristian Gafton - gafton@sorosis.ro
+ *
+ * We are passed a string of the form ('BASH' constants for ulimit)
+ *     [Aa][Cc][Dd][Ff][Mm][Nn][Rr][Ss][Tt][Uu][Ll][Pp][Ii][Oo]
+ *     (eg. 'C2F256D2048N5' or 'C2 F256 D2048 N5')
+ * where:
+ * [Aa]: a = RLIMIT_AS		max address space (KB)
+ * [Cc]: c = RLIMIT_CORE	max core file size (KB)
+ * [Dd]: d = RLIMIT_DATA	max data size (KB)
+ * [Ff]: f = RLIMIT_FSIZE	max file size (KB)
+ * [Ii]: i = RLIMIT_NICE    max nice value (0..39 translates to 20..-19)
+ * [Kk]: k = file creation masK (umask)
+ * [Ll]: l = max number of logins for this user
+ * [Mm]: m = RLIMIT_MEMLOCK	max locked-in-memory address space (KB)
+ * [Nn]: n = RLIMIT_NOFILE	max number of open files
+ * [Oo]: o = RLIMIT_RTPRIO  max real time priority (linux/sched.h 0..MAX_RT_PRIO)
+ * [Pp]: p = process priority -20..20 (negative = high, positive = low)
+ * [Rr]: r = RLIMIT_RSS		max resident set size (KB)
+ * [Ss]: s = RLIMIT_STACK	max stack size (KB)
+ * [Tt]: t = RLIMIT_CPU		max CPU time (MIN)
+ * [Uu]: u = RLIMIT_NPROC	max number of processes
+ *
+ * NOTE: Remember to extend the "no-limits" string below when adding a new
+ * limit...
+ *
+ * Return value:
+ *		0 = okay, of course
+ *		LOGIN_ERROR_RLIMIT = error setting some RLIMIT
+ *		LOGIN_ERROR_LOGIN  = error - too many logins for this user
+ *
+ * buf - the limits string
+ * name - the username
+ */
+static int do_user_limits (const char *buf, const char *name)
+{
+	const char *pp;
+	int retval = 0;
+	bool reported = false;
+
+	pp = buf;
+	/* Skip leading whitespace. */
+	while ((' ' == *pp) || ('\t' == *pp)) {
+		pp++;
+	}
+
+	/* The special limit string "-" results in no limit for all known
+	 * limits.
+	 * We achieve that by parsing a full limit string, parts of it
+	 * being ignored if a limit type is not known to the system.
+	 * Though, there will be complaining for unknown limit types.
+	 */
+	if (strcmp (pp, "-") == 0) {
+		/* Remember to extend this, too, when adding new limits!
+		 * Oh... but "unlimited" does not make sense for umask,
+		 * or does it? (K-)
+		 */
+		pp = "A- C- D- F- I- L- M- N- O- P- R- S- T- U-";
+	}
+
+	while ('\0' != *pp) {
+		switch (*pp++) {
+		case 'a':
+		case 'A':
+			/* RLIMIT_AS - max address space (KB) */
+			retval |= setrlimit_value (RLIMIT_AS, pp, 1024);
+			break;
+		case 'c':
+		case 'C':
+			/* RLIMIT_CORE - max core file size (KB) */
+			retval |= setrlimit_value (RLIMIT_CORE, pp, 1024);
+			break;
+		case 'd':
+		case 'D':
+			/* RLIMIT_DATA - max data size (KB) */
+			retval |= setrlimit_value (RLIMIT_DATA, pp, 1024);
+			break;
+		case 'f':
+		case 'F':
+			/* RLIMIT_FSIZE - Maximum filesize (KB) */
+			retval |= setrlimit_value (RLIMIT_FSIZE, pp, 1024);
+			break;
+#ifdef RLIMIT_NICE
+		case 'i':
+		case 'I':
+			/* RLIMIT_NICE - max scheduling priority (0..39) */
+			retval |= setrlimit_value (RLIMIT_NICE, pp, 1);
+			break;
+#endif
+		case 'k':
+		case 'K':
+			retval |= set_umask (pp);
+			break;
+		case 'l':
+		case 'L':
+			/* LIMIT the number of concurrent logins */
+			retval |= check_logins (name, pp);
+			break;
+#ifdef RLIMIT_MEMLOCK
+		case 'm':
+		case 'M':
+			/* RLIMIT_MEMLOCK - max locked-in-memory address space (KB) */
+			retval |= setrlimit_value (RLIMIT_MEMLOCK, pp, 1024);
+			break;
+#endif
+		case 'n':
+		case 'N':
+			/* RLIMIT_NOFILE - max number of open files */
+			retval |= setrlimit_value (RLIMIT_NOFILE, pp, 1);
+			break;
+#ifdef RLIMIT_RTPRIO
+		case 'o':
+		case 'O':
+			/* RLIMIT_RTPRIO - max real time priority (0..MAX_RT_PRIO) */
+			retval |= setrlimit_value (RLIMIT_RTPRIO, pp, 1);
+			break;
+#endif
+		case 'p':
+		case 'P':
+			retval |= set_prio (pp);
+			break;
+#ifdef RLIMIT_RSS
+		case 'r':
+		case 'R':
+			/* RLIMIT_RSS - max resident set size (KB) */
+			retval |= setrlimit_value (RLIMIT_RSS, pp, 1024);
+			break;
+#endif
+		case 's':
+		case 'S':
+			/* RLIMIT_STACK - max stack size (KB) */
+			retval |= setrlimit_value (RLIMIT_STACK, pp, 1024);
+			break;
+		case 't':
+		case 'T':
+			/* RLIMIT_CPU - max CPU time (MIN) */
+			retval |= setrlimit_value (RLIMIT_CPU, pp, 60);
+			break;
+#ifdef RLIMIT_NPROC
+		case 'u':
+		case 'U':
+			/* RLIMIT_NPROC - max number of processes */
+			retval |= setrlimit_value (RLIMIT_NPROC, pp, 1);
+			break;
+#endif
+		default:
+			/* Only report invalid strings once */
+			/* Note: A string can be invalid just because a
+			 * specific (theoretically valid) setting is not
+			 * supported by this build.
+			 * It is just a warning in syslog anyway. The line
+			 * is still processed
+			 */
+			if (!reported) {
+				SYSLOG ((LOG_WARN,
+				         "Invalid limit string: '%s'",
+				         pp-1));
+				reported = true;
+				retval |= LOGIN_ERROR_RLIMIT;
+			}
+		}
+		/* After parsing one limit setting (or just complaining
+		 * about it), one still needs to skip its argument to
+		 * prevent a bogus warning on trying to parse that as
+		 * limit specification.
+		 * So, let's skip all digits, "-" and our limited set of
+		 * whitespace.
+		 */
+		while (   isdigit (*pp)
+		       || ('-'  == *pp)
+		       || (' '  == *pp)
+		       || ('\t' ==*pp)) {
+			pp++;
+		}
+	}
+	return retval;
+}
+
+/* Check if user uname is in the group gname.
+ * Can I be sure that gr_mem contains no UID as string?
+ * Returns true when user is in the group, false when not.
+ * Any error is treated as false.
+ */
+static bool user_in_group (const char *uname, const char *gname)
+{
+	struct group *groupdata;
+
+	if (uname == NULL || gname == NULL) {
+		return false;
+	}
+
+	/* We are not claiming to be re-entrant!
+	 * In case of paranoia or a multithreaded login program,
+	 * one needs to add some mess for getgrnam_r. */
+	groupdata = getgrnam (gname);
+	if (NULL == groupdata) {
+		SYSLOG ((LOG_WARN, "Nonexisting group `%s' in limits file.",
+		         gname));
+		return false;
+	}
+
+	return is_on_list (groupdata->gr_mem, uname);
+}
+
+static int setup_user_limits (const char *uname)
+{
+	FILE *fil;
+	char buf[1024];
+	char name[1024];
+	char limits[1024];
+	char deflimits[1024];
+	char tempbuf[1024];
+
+	/* init things */
+	MEMZERO(buf);
+	MEMZERO(name);
+	MEMZERO(limits);
+	MEMZERO(deflimits);
+	MEMZERO(tempbuf);
+
+	/* start the checks */
+	fil = fopen (LIMITS_FILE, "r");
+	if (fil == NULL) {
+		return 0;
+	}
+	/* The limits file have the following format:
+	 * - '#' (comment) chars only as first chars on a line;
+	 * - username must start on first column (or *, or @group)
+	 *
+	 * FIXME: A better (smarter) checking should be done
+	 */
+	while (fgets (buf, 1024, fil) != NULL) {
+		if (('#' == buf[0]) || ('\n' == buf[0])) {
+			continue;
+		}
+		MEMZERO(tempbuf);
+		/* a valid line should have a username, then spaces,
+		 * then limits
+		 * we allow the format:
+		 * username    L2  D2048  R4096
+		 * where spaces={' ',\t}. Also, we reject invalid limits.
+		 * Imposing a limit should be done with care, so a wrong
+		 * entry means no care anyway :-).
+		 *
+		 * A '-' as a limits strings means no limits
+		 *
+		 * The username can also be:
+		 *  '*': the default limits (only the last is taken into
+		 *       account)
+		 *  @group: the limit applies to the members of the group
+		 *
+		 * To clarify: The first entry with matching user name rules,
+		 * everything after it is ignored. If there is no user entry,
+		 * the last encountered entry for a matching group rules.
+		 * If there is no matching group entry, the default limits rule.
+		 */
+		if (sscanf (buf, "%s%[ACDFIKLMNOPRSTUacdfiklmnoprstu0-9 \t-]",
+		            name, tempbuf) == 2) {
+			if (strcmp (name, uname) == 0) {
+				strcpy (limits, tempbuf);
+				break;
+			} else if (strcmp (name, "*") == 0) {
+				strcpy (deflimits, tempbuf);
+			} else if (name[0] == '@') {
+				/* If the user is in the group, the group
+				 * limits apply unless later a line for
+				 * the specific user is found.
+				 */
+				if (user_in_group (uname, name+1)) {
+					strcpy (limits, tempbuf);
+				}
+			}
+		}
+	}
+	(void) fclose (fil);
+	if (limits[0] == '\0') {
+		/* no user specific limits */
+		if (deflimits[0] == '\0') {	/* no default limits */
+			return 0;
+		}
+		strcpy (limits, deflimits);	/* use the default limits */
+	}
+	return do_user_limits (limits, uname);
+}
+
+
+static void setup_usergroups (const struct passwd *info)
+{
+	const struct group *grp;
+
+/*
+ *	if not root, and UID == GID, and username is the same as primary
+ *	group name, set umask group bits to be the same as owner bits
+ *	(examples: 022 -> 002, 077 -> 007).
+ */
+	if ((0 != info->pw_uid) && (info->pw_uid == info->pw_gid)) {
+		/* local, no need for xgetgrgid */
+		grp = getgrgid (info->pw_gid);
+		if (   (NULL != grp)
+		    && (strcmp (info->pw_name, grp->gr_name) == 0)) {
+			mode_t tmpmask;
+			tmpmask = umask (0777);
+			tmpmask = (tmpmask & ~070) | ((tmpmask >> 3) & 070);
+			(void) umask (tmpmask);
+		}
+	}
+}
+
+/*
+ *	set the process nice, ulimit, and umask from the password file entry
+ */
+
+void setup_limits (const struct passwd *info)
+{
+	char *cp;
+
+	if (getdef_bool ("USERGROUPS_ENAB")) {
+		setup_usergroups (info);
+	}
+
+	/*
+	 * See if the GECOS field contains values for NICE, UMASK or ULIMIT.
+	 * If this feature is enabled in /etc/login.defs, we make those
+	 * values the defaults for this login session.
+	 */
+
+	if (getdef_bool ("QUOTAS_ENAB")) {
+		if (info->pw_uid != 0) {
+			if ((setup_user_limits (info->pw_name) & LOGIN_ERROR_LOGIN) != 0) {
+				(void) fputs (_("Too many logins.\n"), log_get_logfd());
+				(void) sleep (2); /* XXX: Should be FAIL_DELAY */
+				exit (EXIT_FAILURE);
+			}
+		}
+		for (cp = info->pw_gecos; cp != NULL; cp = strchr (cp, ',')) {
+			if (',' == *cp) {
+				cp++;
+			}
+
+			if (strncmp (cp, "pri=", 4) == 0) {
+				long  inc;
+
+				if (   (str2sl(&inc, cp + 4) == 0)
+				    && (inc >= -20) && (inc <= 20)) {
+					errno = 0;
+					if (   (nice (inc) != -1)
+					    || (0 != errno)) {
+						continue;
+					}
+				}
+
+				/* Failed to parse or failed to nice() */
+				SYSLOG ((LOG_WARN,
+				         "Can't set the nice value for user %s",
+				         info->pw_name));
+
+				continue;
+			}
+			if (strncmp (cp, "ulimit=", 7) == 0) {
+				long  blocks;
+				if (   (str2sl(&blocks, cp + 7) == -1)
+				    || (blocks != (int) blocks)
+				    || (set_filesize_limit (blocks) != 0)) {
+					SYSLOG ((LOG_WARN,
+					         "Can't set the ulimit for user %s",
+					         info->pw_name));
+				}
+				continue;
+			}
+			if (strncmp (cp, "umask=", 6) == 0) {
+				unsigned long  mask;
+
+				if (   (str2ul(&mask, cp + 6) == -1)
+				    || (mask != (mode_t) mask)) {
+					SYSLOG ((LOG_WARN,
+					         "Can't set umask value for user %s",
+					         info->pw_name));
+				} else {
+					(void) umask (mask);
+				}
+
+				continue;
+			}
+		}
+	}
+}
+
+#else				/* !USE_PAM */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* !USE_PAM */
+
diff --git a/lib/list.c b/lib/list.c
new file mode 100644
index 0000000..9fc6608
--- /dev/null
+++ b/lib/list.c
@@ -0,0 +1,245 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+
+#include "alloc.h"
+#include "prototypes.h"
+#include "defines.h"
+/*
+ * add_list - add a member to a list of group members
+ *
+ *	the array of member names is searched for the new member
+ *	name, and if not present it is added to a freshly allocated
+ *	list of users.
+ */
+/*@only@*/char **
+add_list(/*@returned@*/ /*@only@*/char **list, const char *member)
+{
+	int i;
+	char **tmp;
+
+	assert (NULL != member);
+	assert (NULL != list);
+
+	/*
+	 * Scan the list for the new name.  Return the original list
+	 * pointer if it is present.
+	 */
+
+	for (i = 0; list[i] != NULL; i++) {
+		if (strcmp (list[i], member) == 0) {
+			return list;
+		}
+	}
+
+	/*
+	 * Allocate a new list pointer large enough to hold all the
+	 * old entries, and the new entries as well.
+	 */
+
+	tmp = XMALLOC(i + 2, char *);
+
+	/*
+	 * Copy the original list to the new list, then append the
+	 * new member and NULL terminate the result.  This new list
+	 * is returned to the invoker.
+	 */
+
+	for (i = 0; list[i] != NULL; i++) {
+		tmp[i] = list[i];
+	}
+
+	tmp[i] = xstrdup (member);
+	tmp[i+1] = NULL;
+
+	return tmp;
+}
+
+/*
+ * del_list - delete a member from a list of group members
+ *
+ *	the array of member names is searched for the old member
+ *	name, and if present it is deleted from a freshly allocated
+ *	list of users.
+ */
+
+/*@only@*/char **
+del_list(/*@returned@*/ /*@only@*/char **list, const char *member)
+{
+	int i, j;
+	char **tmp;
+
+	assert (NULL != member);
+	assert (NULL != list);
+
+	/*
+	 * Scan the list for the old name.  Return the original list
+	 * pointer if it is not present.
+	 */
+
+	for (i = j = 0; list[i] != NULL; i++) {
+		if (strcmp (list[i], member) != 0) {
+			j++;
+		}
+	}
+
+	if (j == i) {
+		return list;
+	}
+
+	/*
+	 * Allocate a new list pointer large enough to hold all the
+	 * old entries.
+	 */
+
+	tmp = XMALLOC(j + 1, char *);
+
+	/*
+	 * Copy the original list except the deleted members to the
+	 * new list, then NULL terminate the result.  This new list
+	 * is returned to the invoker.
+	 */
+
+	for (i = j = 0; list[i] != NULL; i++) {
+		if (strcmp (list[i], member) != 0) {
+			tmp[j] = list[i];
+			j++;
+		}
+	}
+
+	tmp[j] = NULL;
+
+	return tmp;
+}
+
+/*
+ * Duplicate a list.
+ * The input list is not modified, but in order to allow the use of this
+ * function with list of members, the list elements are not enforced to be
+ * constant strings here.
+ */
+/*@only@*/char **
+dup_list(char *const *list)
+{
+	int i;
+	char **tmp;
+
+	assert (NULL != list);
+
+	for (i = 0; NULL != list[i]; i++);
+
+	tmp = XMALLOC(i + 1, char *);
+
+	i = 0;
+	while (NULL != *list) {
+		tmp[i] = xstrdup (*list);
+		i++;
+		list++;
+	}
+
+	tmp[i] = NULL;
+	return tmp;
+}
+
+/*
+ * Check if member is part of the input list
+ * The input list is not modified, but in order to allow the use of this
+ * function with list of members, the list elements are not enforced to be
+ * constant strings here.
+ */
+bool is_on_list (char *const *list, const char *member)
+{
+	assert (NULL != member);
+	assert (NULL != list);
+
+	while (NULL != *list) {
+		if (strcmp (*list, member) == 0) {
+			return true;
+		}
+		list++;
+	}
+
+	return false;
+}
+
+/*
+ * comma_to_list - convert comma-separated list to (char *) array
+ */
+
+/*@only@*/char **comma_to_list (const char *comma)
+{
+	char *members;
+	char **array;
+	int i;
+	char *cp;
+	char *cp2;
+
+	assert (NULL != comma);
+
+	/*
+	 * Make a copy since we are going to be modifying the list
+	 */
+
+	members = xstrdup (comma);
+
+	/*
+	 * Count the number of commas in the list
+	 */
+
+	for (cp = members, i = 0;; i++) {
+		cp2 = strchr (cp, ',');
+		if (NULL != cp2) {
+			cp = cp2 + 1;
+		} else {
+			break;
+		}
+	}
+
+	/*
+	 * Add 2 - one for the ending NULL, the other for the last item
+	 */
+
+	i += 2;
+
+	/*
+	 * Allocate the array we're going to store the pointers into.
+	 */
+
+	array = XMALLOC(i, char *);
+
+	/*
+	 * Empty list is special - 0 members, not 1 empty member.  --marekm
+	 */
+
+	if ('\0' == *members) {
+		*array = NULL;
+		free (members);
+		return array;
+	}
+
+	/*
+	 * Now go walk that list all over again, this time building the
+	 * array of pointers.
+	 */
+
+	for (cp = members, i = 0; cp != NULL; i++)
+		array[i] = strsep(&cp, ",");
+	array[i] = NULL;
+
+	/*
+	 * Return the new array of pointers
+	 */
+
+	return array;
+}
+
diff --git a/lib/lockpw.c b/lib/lockpw.c
index aaa317f..15e7c8f 100644
--- a/lib/lockpw.c
+++ b/lib/lockpw.c
@@ -81,5 +81,5 @@ int ulckpwdf (void)
 	return (pw_unlock () && spw_unlock ())? 0 : -1;
 }
 #else
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif
diff --git a/lib/log.c b/lib/log.c
new file mode 100644
index 0000000..9f54d45
--- /dev/null
+++ b/lib/log.c
@@ -0,0 +1,109 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <pwd.h>
+#include <fcntl.h>
+#include <time.h>
+#include "defines.h"
+#include <lastlog.h>
+#include "memzero.h"
+#include "prototypes.h"
+#include "string/strncpy.h"
+#include "string/strtcpy.h"
+
+
+/*
+ * dolastlog - create lastlog entry
+ *
+ *	A "last login" entry is created for the user being logged in.  The
+ *	UID is extracted from the global (struct passwd) entry and the
+ *	TTY information is gotten from the (struct utmpx).
+ */
+void dolastlog (
+	struct lastlog *ll,
+	const struct passwd *pw,
+	/*@unique@*/const char *line,
+	/*@unique@*/const char *host)
+{
+	int fd;
+	off_t offset;
+	struct lastlog newlog;
+	time_t ll_time;
+
+	/*
+	 * If the file does not exist, don't create it.
+	 */
+
+	fd = open (LASTLOG_FILE, O_RDWR);
+	if (-1 == fd) {
+		return;
+	}
+
+	/*
+	 * The file is indexed by UID number.  Seek to the record
+	 * for this UID.  Negative UID's will create problems, but ...
+	 */
+
+	offset = (off_t) pw->pw_uid * sizeof newlog;
+
+	if (lseek (fd, offset, SEEK_SET) != offset) {
+		SYSLOG ((LOG_WARN,
+		         "Can't read last lastlog entry for UID %lu in %s. Entry not updated.",
+		         (unsigned long) pw->pw_uid, LASTLOG_FILE));
+		(void) close (fd);
+		return;
+	}
+
+	/*
+	 * Read the old entry so we can tell the user when they last
+	 * logged in.  Then construct the new entry and write it out
+	 * the way we read the old one in.
+	 */
+
+	if (read (fd, &newlog, sizeof newlog) != (ssize_t) sizeof newlog) {
+		memzero (&newlog, sizeof newlog);
+	}
+	if (NULL != ll) {
+		*ll = newlog;
+	}
+
+	ll_time = newlog.ll_time;
+	(void) time (&ll_time);
+	newlog.ll_time = ll_time;
+	STRTCPY(newlog.ll_line, line);
+#if HAVE_LL_HOST
+	STRNCPY(newlog.ll_host, host);
+#endif
+	if (   (lseek (fd, offset, SEEK_SET) != offset)
+	    || (write_full(fd, &newlog, sizeof newlog) == -1)) {
+		goto err_write;
+	}
+
+	if (close (fd) != 0 && errno != EINTR) {
+		goto err_close;
+	}
+
+	return;
+
+err_write:
+	{
+		int saved_errno = errno;
+		(void) close (fd);
+		errno = saved_errno;
+	}
+err_close:
+	SYSLOG ((LOG_WARN,
+	         "Can't write lastlog entry for UID %lu in %s: %m",
+	         (unsigned long) pw->pw_uid, LASTLOG_FILE));
+}
diff --git a/lib/logind.c b/lib/logind.c
new file mode 100644
index 0000000..ba7278f
--- /dev/null
+++ b/lib/logind.c
@@ -0,0 +1,52 @@
+/*
+ * SPDX-FileCopyrightText:  2023, Iker Pedrosa <ipedrosa@redhat.com>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "attr.h"
+#include "defines.h"
+#include "prototypes.h"
+
+#include <systemd/sd-login.h>
+
+int get_session_host (char **out)
+{
+    char *host = NULL;
+    char *session = NULL;
+    int ret;
+
+    ret = sd_pid_get_session (getpid(), &session);
+    if (ret < 0) {
+        return ret;
+    }
+    ret = sd_session_get_remote_host (session, &host);
+    if (ret < 0) {
+        goto done;
+    }
+
+    *out = host;
+
+done:
+    free (session);
+    return ret;
+}
+
+unsigned long active_sessions_count(const char *name, MAYBE_UNUSED unsigned long limit)
+{
+    struct passwd *pw;
+    unsigned long count = 0;
+
+    pw = prefix_getpwnam(name);
+    if (pw == NULL) {
+        return 0;
+    }
+
+    count = sd_uid_get_sessions(pw->pw_uid, 0, NULL);
+
+    return count;
+}
diff --git a/lib/loginprompt.c b/lib/loginprompt.c
new file mode 100644
index 0000000..9b2aa25
--- /dev/null
+++ b/lib/loginprompt.c
@@ -0,0 +1,111 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1993, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2011, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+#include <stdio.h>
+#include <signal.h>
+
+#include "alloc.h"
+#include "attr.h"
+#include "memzero.h"
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+
+static void login_exit (MAYBE_UNUSED int sig)
+{
+	_exit (EXIT_FAILURE);
+}
+
+/*
+ * login_prompt - prompt the user for their login name
+ *
+ * login_prompt() displays the standard login prompt.  If ISSUE_FILE
+ * is set in login.defs, this file is displayed before the prompt.
+ */
+
+void login_prompt (char *name, int namesize)
+{
+	char buf[1024];
+
+	char *cp;
+	int i;
+	FILE *fp;
+	const char *fname = getdef_str ("ISSUE_FILE");
+
+	sighandler_t sigquit;
+	sighandler_t sigtstp;
+
+	/*
+	 * There is a small chance that a QUIT character will be part of
+	 * some random noise during a prompt.  Deal with this by exiting
+	 * instead of core dumping.  Do the same thing for SIGTSTP.
+	 */
+
+	sigquit = signal (SIGQUIT, login_exit);
+	sigtstp = signal (SIGTSTP, login_exit);
+
+	/*
+	 * See if the user has configured the issue file to
+	 * be displayed and display it before the prompt.
+	 */
+
+	if (NULL != fname) {
+		fp = fopen (fname, "r");
+		if (NULL != fp) {
+			while ((i = getc (fp)) != EOF) {
+				(void) putc (i, stdout);
+			}
+
+			(void) fclose (fp);
+		}
+	}
+	(void) gethostname (buf, sizeof buf);
+	printf (_("\n%s login: "), buf);
+	(void) fflush (stdout);
+
+	/*
+	 * Read the user's response.  The trailing newline will be
+	 * removed.
+	 */
+
+	MEMZERO(buf);
+	if (fgets (buf, sizeof buf, stdin) != buf) {
+		exit (EXIT_FAILURE);
+	}
+
+	cp = strchr (buf, '\n');
+	if (NULL == cp) {
+		exit (EXIT_FAILURE);
+	}
+	*cp = '\0';		/* remove \n [ must be there ] */
+
+	/*
+	 * Skip leading whitespace.  This makes "  username" work right.
+	 * Then copy the rest (up to the end) into the username.
+	 */
+
+	for (cp = buf; *cp == ' ' || *cp == '\t'; cp++);
+
+	for (i = 0; i < namesize - 1 && *cp != '\0'; name[i++] = *cp++);
+
+	name[i] = '\0';
+
+	/*
+	 * Set the SIGQUIT handler back to its original value
+	 */
+
+	(void) signal (SIGQUIT, sigquit);
+	(void) signal (SIGTSTP, sigtstp);
+}
+
diff --git a/lib/mail.c b/lib/mail.c
new file mode 100644
index 0000000..d14bdb1
--- /dev/null
+++ b/lib/mail.c
@@ -0,0 +1,67 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1991, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <assert.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "alloc.h"
+#include "getdef.h"
+#include "string/sprintf.h"
+
+#ident "$Id$"
+
+
+void mailcheck (void)
+{
+	struct stat statbuf;
+	char *mailbox;
+
+	if (!getdef_bool ("MAIL_CHECK_ENAB")) {
+		return;
+	}
+
+	/*
+	 * Check incoming mail in Maildir format - J.
+	 */
+	mailbox = getenv ("MAILDIR");
+	if (NULL != mailbox) {
+		char  *newmail;
+
+		xasprintf(&newmail, "%s/new", mailbox);
+
+		if (stat (newmail, &statbuf) != -1 && statbuf.st_size != 0) {
+			if (statbuf.st_mtime > statbuf.st_atime) {
+				free(newmail);
+				(void) puts (_("You have new mail."));
+				return;
+			}
+		}
+		free(newmail);
+	}
+
+	mailbox = getenv ("MAIL");
+	if (NULL == mailbox) {
+		return;
+	}
+
+	if (   (stat (mailbox, &statbuf) == -1)
+	    || (statbuf.st_size == 0)) {
+		(void) puts (_("No mail."));
+	} else if (statbuf.st_atime > statbuf.st_mtime) {
+		(void) puts (_("You have mail."));
+	} else {
+		(void) puts (_("You have new mail."));
+	}
+}
+
diff --git a/lib/memzero.c b/lib/memzero.c
new file mode 100644
index 0000000..8979e5f
--- /dev/null
+++ b/lib/memzero.c
@@ -0,0 +1,17 @@
+/*
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stddef.h>
+
+#include "memzero.h"
+
+
+extern inline void memzero(void *ptr, size_t size);
+extern inline void strzero(char *s);
diff --git a/lib/memzero.h b/lib/memzero.h
new file mode 100644
index 0000000..1137e83
--- /dev/null
+++ b/lib/memzero.h
@@ -0,0 +1,49 @@
+/*
+ * SPDX-FileCopyrightText: 2022-2023, Christian Göttsche <cgzones@googlemail.com>
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIBMISC_MEMZERO_H_
+#define SHADOW_INCLUDE_LIBMISC_MEMZERO_H_
+
+
+#include <config.h>
+
+#include <stddef.h>
+#include <string.h>
+#include <strings.h>
+
+#include "sizeof.h"
+
+
+#define MEMZERO(arr)  memzero(arr, SIZEOF_ARRAY(arr))
+
+
+inline void memzero(void *ptr, size_t size);
+inline void strzero(char *s);
+
+
+inline void
+memzero(void *ptr, size_t size)
+{
+#if defined(HAVE_MEMSET_EXPLICIT)
+	memset_explicit(ptr, 0, size);
+#elif defined(HAVE_EXPLICIT_BZERO)
+	explicit_bzero(ptr, size);
+#else
+	bzero(ptr, size);
+	__asm__ __volatile__ ("" : : "r"(ptr) : "memory");
+#endif
+}
+
+
+inline void
+strzero(char *s)
+{
+	memzero(s, strlen(s));
+}
+
+
+#endif  // include guard
diff --git a/lib/motd.c b/lib/motd.c
new file mode 100644
index 0000000..d1d5bf6
--- /dev/null
+++ b/lib/motd.c
@@ -0,0 +1,60 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1991, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2010       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+
+#include "alloc.h"
+#include "defines.h"
+#include "getdef.h"
+#include "prototypes.h"
+/*
+ * motd -- output the /etc/motd file
+ *
+ * motd() determines the name of a login announcement file and outputs
+ * it to the user's terminal at login time.  The MOTD_FILE configuration
+ * option is a colon-delimited list of filenames.
+ */
+void motd (void)
+{
+	FILE *fp;
+	char *motdlist;
+	const char *motdfile;
+	char *mb;
+	int c;
+
+	motdfile = getdef_str ("MOTD_FILE");
+	if (NULL == motdfile) {
+		return;
+	}
+
+	motdlist = xstrdup (motdfile);
+
+	for (mb = motdlist; ;mb = NULL) {
+		motdfile = strtok (mb, ":");
+		if (NULL == motdfile) {
+			break;
+		}
+
+		fp = fopen (motdfile, "r");
+		if (NULL != fp) {
+			while ((c = getc (fp)) != EOF) {
+				putchar (c);
+			}
+			fclose (fp);
+		}
+	}
+	fflush (stdout);
+
+	free (motdlist);
+}
+
diff --git a/lib/must_be.h b/lib/must_be.h
new file mode 100644
index 0000000..a7365cb
--- /dev/null
+++ b/lib/must_be.h
@@ -0,0 +1,99 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIBMISC_MUST_BE_H_
+#define SHADOW_INCLUDE_LIBMISC_MUST_BE_H_
+
+
+#include <config.h>
+
+#include <assert.h>
+
+
+/*
+ * SYNOPSIS
+ *	int must_be(bool e);
+ *
+ * ARGUMENTS
+ *	e	Expression to be asserted.
+ *
+ * DESCRIPTION
+ *	This macro fails compilation if 'e' is false.  If 'e' is true,
+ *	it returns (int) 0, so it doesn't affect the expression in which
+ *	it is contained.
+ *
+ *	This macro is similar to static_assert(3).  While
+ *	static_assert(3) can only be used where a statement is allowed,
+ *	this must_be() macro can be used wherever an expression is
+ *	allowed.
+ *
+ * RETURN VALUE
+ *	0
+ *
+ * ERRORS
+ *	If 'e' is false, the compilation will fail, as when using
+ *	static_assert(3).
+ *
+ * EXAMPLES
+ *	#define must_be_array(a)  must_be(is_array(a))
+ *
+ *	#define NITEMS(a)  (sizeof(a) / sizeof(*(a)) + must_be_array(a))
+ *
+ *	int foo[42];
+ *	int bar[NITEMS(foo)];
+ */
+
+
+#define must_be(e)                                                            \
+(                                                                             \
+	0 * (int) sizeof(                                                     \
+		struct {                                                      \
+			static_assert(e, "");                                 \
+			int ISO_C_forbids_a_struct_with_no_members_;          \
+		}                                                             \
+	)                                                                     \
+)
+
+
+/*
+ * SYNOPSIS
+ *	int must_be_array(a);
+ *
+ * ARGUMENTS
+ *	a	Array.
+ *
+ * DESCRIPTION
+ *	This macro fails compilation if 'a' is not an array.  It is
+ *	useful in macros that accept an array as a parameter, where this
+ *	macro can validate the macro argument.  It prevent passing a
+ *	pointer to such macros, which would otherwise produce silent
+ *	bugs.
+ *
+ * RETURN VALUE
+ *	0
+ *
+ * ERRORS
+ *	If 'a' is not an array, the compilation will fail.
+ *
+ * EXAMPLES
+ *	int a[10];
+ *	int *p;
+ *
+ *	must_be_array(a);  // Ok
+ *	must_be_array(p);  // Compile-time error
+ *
+ * SEE ALSO
+ *	must_be()
+ */
+
+
+#define is_same_type(a, b)    __builtin_types_compatible_p(a, b)
+#define is_same_typeof(a, b)  is_same_type(typeof(a), typeof(b))
+#define is_array(a)           (!is_same_typeof((a), &(a)[0]))
+#define must_be_array(a)      must_be(is_array(a))
+
+
+#endif  // include guard
diff --git a/lib/myname.c b/lib/myname.c
new file mode 100644
index 0000000..1b02617
--- /dev/null
+++ b/lib/myname.c
@@ -0,0 +1,49 @@
+/*
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * myname.c - determine the current username and get the passwd entry
+ *
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "defines.h"
+#include <pwd.h>
+#include "prototypes.h"
+/*@null@*/ /*@only@*/struct passwd *get_my_pwent (void)
+{
+	struct passwd *pw;
+	const char *cp = getlogin ();
+	uid_t ruid = getuid ();
+
+	/*
+	 * Try getlogin() first - if it fails or returns a non-existent
+	 * username, or a username which doesn't match the real UID, fall
+	 * back to getpwuid(getuid()).  This should work reasonably with
+	 * usernames longer than the utmp limit (8 characters), as well as
+	 * shared UIDs - but not both at the same time...
+	 *
+	 * XXX - when running from su, will return the current user (not
+	 * the original user, like getlogin() does).  Does this matter?
+	 */
+	if ((NULL != cp) && ('\0' != *cp)) {
+		pw = xgetpwnam (cp);
+		if ((NULL != pw) && (pw->pw_uid == ruid)) {
+			return pw;
+		}
+		if (NULL != pw) {
+			pw_free (pw);
+		}
+	}
+
+	return xgetpwuid (ruid);
+}
+
diff --git a/lib/nscd.c b/lib/nscd.c
index 2c2251a..451a5a3 100644
--- a/lib/nscd.c
+++ b/lib/nscd.c
@@ -53,6 +53,6 @@ int nscd_flush_cache (const char *service)
 	return 0;
 }
 #else				/* USE_NSCD */
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/* USE_NSCD */
 
diff --git a/lib/nss.c b/lib/nss.c
index 23d0518..779d825 100644
--- a/lib/nss.c
+++ b/lib/nss.c
@@ -1,3 +1,5 @@
+#include <config.h>
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <dlfcn.h>
@@ -6,10 +8,14 @@
 #include <strings.h>
 #include <ctype.h>
 #include <stdatomic.h>
+
+#include "alloc.h"
 #include "prototypes.h"
 #include "../libsubid/subid.h"
 #include "shadowlog_internal.h"
 #include "shadowlog.h"
+#include "string/sprintf.h"
+
 
 #define NSSWITCH "/etc/nsswitch.conf"
 
@@ -40,10 +46,12 @@ static void nss_exit(void) {
 
 // nsswitch_path is an argument only to support testing.
 void nss_init(const char *nsswitch_path) {
-	FILE *nssfp = NULL;
-	char *line = NULL, *p, *token, *saveptr;
-	size_t len = 0;
-	FILE *shadow_logfd = log_get_logfd();
+	char    *line = NULL, *p, *token, *saveptr;
+	char    libname[64];
+	FILE    *nssfp = NULL;
+	FILE    *shadow_logfd = log_get_logfd();
+	void    *h;
+	size_t  len = 0;
 
 	if (atomic_flag_test_and_set(&nss_init_started)) {
 		// Another thread has started nss_init, wait for it to complete
@@ -59,82 +67,78 @@ void nss_init(const char *nsswitch_path) {
 	//   subid:	files
 	nssfp = fopen(nsswitch_path, "r");
 	if (!nssfp) {
+		if (errno != ENOENT)
+			fprintf(shadow_logfd, "Failed opening %s: %m\n", nsswitch_path);
+
 		atomic_store(&nss_init_completed, true);
 		return;
 	}
-	while ((getline(&line, &len, nssfp)) != -1) {
-		if (line[0] == '\0' || line[0] == '#')
+	p = NULL;
+	while (getline(&line, &len, nssfp) != -1) {
+		if (line[0] == '#')
 			continue;
 		if (strlen(line) < 8)
 			continue;
 		if (strncasecmp(line, "subid:", 6) != 0)
 			continue;
 		p = &line[6];
-		while ((*p) && isspace(*p))
+		while (isspace(*p))
 			p++;
-		if (!*p)
-			continue;
-		for (token = strtok_r(p, " \n\t", &saveptr);
-		     token;
-		     token = strtok_r(NULL, " \n\t", &saveptr)) {
-			char libname[65];
-			void *h;
-			if (strcmp(token, "files") == 0) {
-				subid_nss = NULL;
-				goto done;
-			}
-			if (strlen(token) > 50) {
-				fprintf(shadow_logfd, "Subid NSS module name too long (longer than 50 characters): %s\n", token);
-				fprintf(shadow_logfd, "Using files\n");
-				subid_nss = NULL;
-				goto done;
-			}
-			snprintf(libname, 64,  "libsubid_%s.so", token);
-			h = dlopen(libname, RTLD_LAZY);
-			if (!h) {
-				fprintf(shadow_logfd, "Error opening %s: %s\n", libname, dlerror());
-				fprintf(shadow_logfd, "Using files\n");
-				subid_nss = NULL;
-				goto done;
-			}
-			subid_nss = malloc(sizeof(*subid_nss));
-			if (!subid_nss) {
-				dlclose(h);
-				goto done;
-			}
-			subid_nss->has_range = dlsym(h, "shadow_subid_has_range");
-			if (!subid_nss->has_range) {
-				fprintf(shadow_logfd, "%s did not provide @has_range@\n", libname);
-				dlclose(h);
-				free(subid_nss);
-				subid_nss = NULL;
-				goto done;
-			}
-			subid_nss->list_owner_ranges = dlsym(h, "shadow_subid_list_owner_ranges");
-			if (!subid_nss->list_owner_ranges) {
-				fprintf(shadow_logfd, "%s did not provide @list_owner_ranges@\n", libname);
-				dlclose(h);
-				free(subid_nss);
-				subid_nss = NULL;
-				goto done;
-			}
-			subid_nss->find_subid_owners = dlsym(h, "shadow_subid_find_subid_owners");
-			if (!subid_nss->find_subid_owners) {
-				fprintf(shadow_logfd, "%s did not provide @find_subid_owners@\n", libname);
-				dlclose(h);
-				free(subid_nss);
-				subid_nss = NULL;
-				goto done;
-			}
-			subid_nss->handle = h;
-			goto done;
-		}
+		if (*p != '\0')
+			break;
+		p = NULL;
+	}
+	if (p == NULL) {
+		goto null_subid;
+	}
+	token = strtok_r(p, " \n\t", &saveptr);
+	if (token == NULL) {
 		fprintf(shadow_logfd, "No usable subid NSS module found, using files\n");
 		// subid_nss has to be null here, but to ease reviews:
-		free(subid_nss);
-		subid_nss = NULL;
-		goto done;
+		goto null_subid;
 	}
+	if (strcmp(token, "files") == 0) {
+		goto null_subid;
+	}
+	if (strlen(token) > 50) {
+		fprintf(shadow_logfd, "Subid NSS module name too long (longer than 50 characters): %s\n", token);
+		fprintf(shadow_logfd, "Using files\n");
+		goto null_subid;
+	}
+	SNPRINTF(libname, "libsubid_%s.so", token);
+	h = dlopen(libname, RTLD_LAZY);
+	if (!h) {
+		fprintf(shadow_logfd, "Error opening %s: %s\n", libname, dlerror());
+		fprintf(shadow_logfd, "Using files\n");
+		goto null_subid;
+	}
+	subid_nss = MALLOC(1, struct subid_nss_ops);
+	if (!subid_nss) {
+		goto close_lib;
+	}
+	subid_nss->has_range = dlsym(h, "shadow_subid_has_range");
+	if (!subid_nss->has_range) {
+		fprintf(shadow_logfd, "%s did not provide @has_range@\n", libname);
+		goto close_lib;
+	}
+	subid_nss->list_owner_ranges = dlsym(h, "shadow_subid_list_owner_ranges");
+	if (!subid_nss->list_owner_ranges) {
+		fprintf(shadow_logfd, "%s did not provide @list_owner_ranges@\n", libname);
+		goto close_lib;
+	}
+	subid_nss->find_subid_owners = dlsym(h, "shadow_subid_find_subid_owners");
+	if (!subid_nss->find_subid_owners) {
+		fprintf(shadow_logfd, "%s did not provide @find_subid_owners@\n", libname);
+		goto close_lib;
+	}
+	subid_nss->handle = h;
+	goto done;
+
+close_lib:
+	dlclose(h);
+	free(subid_nss);
+null_subid:
+	subid_nss = NULL;
 
 done:
 	atomic_store(&nss_init_completed, true);
diff --git a/lib/obscure.c b/lib/obscure.c
new file mode 100644
index 0000000..549c2a8
--- /dev/null
+++ b/lib/obscure.c
@@ -0,0 +1,224 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+
+#include <ctype.h>
+#include <stdio.h>
+
+#include "alloc.h"
+#include "attr.h"
+#include "memzero.h"
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+
+#if WITH_LIBBSD == 0
+#include "freezero.h"
+#endif /* WITH_LIBBSD */
+
+/*
+ * can't be a palindrome - like `R A D A R' or `M A D A M'
+ */
+static bool palindrome (MAYBE_UNUSED const char *old, const char *new)
+{
+	size_t i, j;
+
+	i = strlen (new);
+
+	for (j = 0; j < i; j++) {
+		if (new[i - j - 1] != new[j]) {
+			return false;
+		}
+	}
+
+	return true;
+}
+
+/*
+ * more than half of the characters are different ones.
+ */
+
+static bool similar (/*@notnull@*/const char *old, /*@notnull@*/const char *new)
+{
+	int i, j;
+
+	/*
+	 * XXX - sometimes this fails when changing from a simple password
+	 * to a really long one (MD5).  For now, I just return success if
+	 * the new password is long enough.  Please feel free to suggest
+	 * something better...  --marekm
+	 */
+	if (strlen (new) >= 8) {
+		return false;
+	}
+
+	for (i = j = 0; ('\0' != new[i]) && ('\0' != old[i]); i++) {
+		if (strchr (new, old[i]) != NULL) {
+			j++;
+		}
+	}
+
+	if (i >= j * 2) {
+		return false;
+	}
+
+	return true;
+}
+
+static char *str_lower (/*@returned@*/char *string)
+{
+	char *cp;
+
+	for (cp = string; '\0' != *cp; cp++) {
+		*cp = tolower (*cp);
+	}
+	return string;
+}
+
+static /*@observer@*//*@null@*/const char *password_check (
+	/*@notnull@*/const char *old,
+	/*@notnull@*/const char *new,
+	/*@notnull@*/MAYBE_UNUSED const struct passwd *pwdp)
+{
+	const char *msg = NULL;
+	char *oldmono, *newmono, *wrapped;
+
+	if (strcmp (new, old) == 0) {
+		return _("no change");
+	}
+
+	newmono = str_lower (xstrdup (new));
+	oldmono = str_lower (xstrdup (old));
+	wrapped = XMALLOC(strlen(oldmono) * 2 + 1, char);
+	strcpy (wrapped, oldmono);
+	strcat (wrapped, oldmono);
+
+	if (palindrome (oldmono, newmono)) {
+		msg = _("a palindrome");
+	} else if (strcmp (oldmono, newmono) == 0) {
+		msg = _("case changes only");
+	} else if (similar (oldmono, newmono)) {
+		msg = _("too similar");
+	} else if (strstr (wrapped, newmono) != NULL) {
+		msg = _("rotated");
+	}
+	strzero (newmono);
+	strzero (oldmono);
+	strzero (wrapped);
+	free (newmono);
+	free (oldmono);
+	free (wrapped);
+
+	return msg;
+}
+
+static /*@observer@*//*@null@*/const char *obscure_msg (
+	/*@notnull@*/const char *old,
+	/*@notnull@*/const char *new,
+	/*@notnull@*/const struct passwd *pwdp)
+{
+	size_t maxlen, oldlen, newlen;
+	char *new1, *old1;
+	const char *msg;
+	const char *result;
+
+	oldlen = strlen (old);
+	newlen = strlen (new);
+
+	if (newlen < (size_t) getdef_num ("PASS_MIN_LEN", 0)) {
+		return _("too short");
+	}
+
+	/*
+	 * Remaining checks are optional.
+	 */
+	if (!getdef_bool ("OBSCURE_CHECKS_ENAB")) {
+		return NULL;
+	}
+
+	msg = password_check (old, new, pwdp);
+	if (NULL != msg) {
+		return msg;
+	}
+
+	result = getdef_str ("ENCRYPT_METHOD");
+	if (NULL == result) {
+	/* The traditional crypt() truncates passwords to 8 chars.  It is
+	   possible to circumvent the above checks by choosing an easy
+	   8-char password and adding some random characters to it...
+	   Example: "password$%^&*123".  So check it again, this time
+	   truncated to the maximum length.  Idea from npasswd.  --marekm */
+
+		if (getdef_bool ("MD5_CRYPT_ENAB")) {
+			return NULL;
+		}
+
+	} else {
+
+		if (   (strcmp (result, "MD5")    == 0)
+#ifdef USE_SHA_CRYPT
+		    || (strcmp (result, "SHA256") == 0)
+		    || (strcmp (result, "SHA512") == 0)
+#endif
+#ifdef USE_BCRYPT
+		    || (strcmp (result, "BCRYPT") == 0)
+#endif
+#ifdef USE_YESCRYPT
+		    || (strcmp (result, "YESCRYPT") == 0)
+#endif
+		    ) {
+			return NULL;
+		}
+
+	}
+	maxlen = getdef_num ("PASS_MAX_LEN", 8);
+	if (   (oldlen <= maxlen)
+	    && (newlen <= maxlen)) {
+		return NULL;
+	}
+
+	new1 = xstrdup (new);
+	old1 = xstrdup (old);
+	if (newlen > maxlen) {
+		new1[maxlen] = '\0';
+	}
+	if (oldlen > maxlen) {
+		old1[maxlen] = '\0';
+	}
+
+	msg = password_check (old1, new1, pwdp);
+
+	freezero (new1, newlen);
+	freezero (old1, oldlen);
+
+	return msg;
+}
+
+/*
+ * Obscure - see if password is obscure enough.
+ *
+ *	The programmer is encouraged to add as much complexity to this
+ *	routine as desired.  Included are some of my favorite ways to
+ *	check passwords.
+ */
+
+bool obscure (const char *old, const char *new, const struct passwd *pwdp)
+{
+	const char *msg = obscure_msg (old, new, pwdp);
+
+	if (NULL != msg) {
+		printf (_("Bad password: %s.  "), msg);
+		return false;
+	}
+	return true;
+}
diff --git a/lib/pam_defs.h b/lib/pam_defs.h
index 2dcda3c..dd016e5 100644
--- a/lib/pam_defs.h
+++ b/lib/pam_defs.h
@@ -15,7 +15,7 @@
 #endif
 
 
-static struct pam_conv conv = {
+static const struct pam_conv conv = {
 	SHADOW_PAM_CONVERSATION,
 	NULL
 };
diff --git a/lib/pam_pass.c b/lib/pam_pass.c
new file mode 100644
index 0000000..ff49173
--- /dev/null
+++ b/lib/pam_pass.c
@@ -0,0 +1,59 @@
+/*
+ * SPDX-FileCopyrightText: 1997 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ifdef USE_PAM
+
+#ident "$Id$"
+
+
+/*
+ * Change the user's password using PAM.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include "defines.h"
+#include "pam_defs.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+void do_pam_passwd (const char *user, bool silent, bool change_expired)
+{
+	pam_handle_t *pamh = NULL;
+	int flags = 0, ret;
+	FILE *shadow_logfd = log_get_logfd();
+
+	if (silent)
+		flags |= PAM_SILENT;
+	if (change_expired)
+		flags |= PAM_CHANGE_EXPIRED_AUTHTOK;
+
+	ret = pam_start ("passwd", user, &conv, &pamh);
+	if (ret != PAM_SUCCESS) {
+		fprintf (shadow_logfd,
+			 _("passwd: pam_start() failed, error %d\n"), ret);
+		exit (10);	/* XXX */
+	}
+
+	ret = pam_chauthtok (pamh, flags);
+	if (ret != PAM_SUCCESS) {
+		fprintf (shadow_logfd, _("passwd: %s\n"), pam_strerror (pamh, ret));
+		fputs (_("passwd: password unchanged\n"), shadow_logfd);
+		pam_end (pamh, ret);
+		exit (10);	/* XXX */
+	}
+
+	fputs (_("passwd: password updated successfully\n"), shadow_logfd);
+	(void) pam_end (pamh, PAM_SUCCESS);
+}
+#else				/* !USE_PAM */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* !USE_PAM */
diff --git a/lib/pam_pass_non_interactive.c b/lib/pam_pass_non_interactive.c
new file mode 100644
index 0000000..3d10908
--- /dev/null
+++ b/lib/pam_pass_non_interactive.c
@@ -0,0 +1,149 @@
+/*
+ * SPDX-FileCopyrightText: 2009 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id:$"
+
+#ifdef USE_PAM
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+
+#include <security/pam_appl.h>
+
+#include "alloc.h"
+#include "attr.h"
+#include "memzero.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+/*@null@*/ /*@only@*/static const char *non_interactive_password = NULL;
+static int ni_conv (int num_msg,
+                    const struct pam_message **msg,
+                    struct pam_response **resp,
+                    MAYBE_UNUSED void *appdata_ptr);
+static const struct pam_conv non_interactive_pam_conv = {
+	ni_conv,
+	NULL
+};
+
+
+
+static int ni_conv (int num_msg,
+                    const struct pam_message **msg,
+                    struct pam_response **resp,
+                    MAYBE_UNUSED void *appdata_ptr)
+{
+	struct pam_response *responses;
+	int count;
+
+	assert (NULL != non_interactive_password);
+
+	if (num_msg <= 0) {
+		return PAM_CONV_ERR;
+	}
+
+	responses = CALLOC (num_msg, struct pam_response);
+	if (NULL == responses) {
+		return PAM_CONV_ERR;
+	}
+
+	for (count=0; count < num_msg; count++) {
+		responses[count].resp_retcode = 0;
+
+		switch (msg[count]->msg_style) {
+		case PAM_PROMPT_ECHO_ON:
+			fprintf (log_get_logfd(),
+			         _("%s: PAM modules requesting echoing are not supported.\n"),
+			         log_get_progname());
+			goto failed_conversation;
+		case PAM_PROMPT_ECHO_OFF:
+			responses[count].resp = strdup (non_interactive_password);
+			if (NULL == responses[count].resp) {
+				goto failed_conversation;
+			}
+			break;
+		case PAM_ERROR_MSG:
+			if (   (NULL == msg[count]->msg)
+			    || (fprintf (log_get_logfd(), "%s\n", msg[count]->msg) <0)) {
+				goto failed_conversation;
+			}
+			responses[count].resp = NULL;
+			break;
+		case PAM_TEXT_INFO:
+			if (   (NULL == msg[count]->msg)
+			    || (fprintf (stdout, "%s\n", msg[count]->msg) <0)) {
+				goto failed_conversation;
+			}
+			responses[count].resp = NULL;
+			break;
+		default:
+			(void) fprintf (log_get_logfd(),
+			                _("%s: conversation type %d not supported.\n"),
+			                log_get_progname(), msg[count]->msg_style);
+			goto failed_conversation;
+		}
+	}
+
+	*resp = responses;
+
+	return PAM_SUCCESS;
+
+failed_conversation:
+	for (count=0; count < num_msg; count++) {
+		if (NULL != responses[count].resp) {
+			strzero(responses[count].resp);
+			free(responses[count].resp);
+			responses[count].resp = NULL;
+		}
+	}
+
+	free (responses);
+	*resp = NULL;
+
+	return PAM_CONV_ERR;
+}
+
+
+/*
+ * Change non interactively the user's password using PAM.
+ *
+ * Return 0 on success, 1 on failure.
+ */
+int do_pam_passwd_non_interactive (const char *pam_service,
+                                    const char *username,
+                                    const char* password)
+{
+	pam_handle_t *pamh = NULL;
+	int ret;
+
+	ret = pam_start (pam_service, username, &non_interactive_pam_conv, &pamh);
+	if (ret != PAM_SUCCESS) {
+		fprintf (log_get_logfd(),
+		         _("%s: (user %s) pam_start failure %d\n"),
+		         log_get_progname(), username, ret);
+		return 1;
+	}
+
+	non_interactive_password = password;
+	ret = pam_chauthtok (pamh, 0);
+	if (ret != PAM_SUCCESS) {
+		fprintf (log_get_logfd(),
+		         _("%s: (user %s) pam_chauthtok() failed, error:\n"
+		           "%s\n"),
+		         log_get_progname(), username, pam_strerror (pamh, ret));
+	}
+
+	(void) pam_end (pamh, PAM_SUCCESS);
+
+	return ((PAM_SUCCESS == ret) ? 0 : 1);
+}
+#else				/* !USE_PAM */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* !USE_PAM */
diff --git a/lib/port.c b/lib/port.c
index 0bea2ef..60ff898 100644
--- a/lib/port.c
+++ b/lib/port.c
@@ -79,7 +79,7 @@ static void endportent (void)
 		(void) fclose (ports);
 	}
 
-	ports = (FILE *) 0;
+	ports = NULL;
 }
 
 /*
@@ -127,14 +127,14 @@ static struct port *getportent (void)
 	 *      - parse off a list of days and times
 	 */
 
-      again:
+again:
 
 	/*
-	 * Get the next line and remove the last character, which
-	 * is a '\n'.  Lines which begin with '#' are all ignored.
+	 * Get the next line and remove optional trailing '\n'.
+	 * Lines which begin with '#' are all ignored.
 	 */
 
-	if (fgets (buf, (int) sizeof buf, ports) == 0) {
+	if (fgets (buf, sizeof buf, ports) == 0) {
 		errno = saveerr;
 		return 0;
 	}
@@ -149,18 +149,14 @@ static struct port *getportent (void)
 	 * TTY devices.
 	 */
 
-	buf[strlen (buf) - 1] = 0;
+	buf[strcspn (buf, "\n")] = 0;
 
 	port.pt_names = ttys;
 	for (cp = buf, j = 0; j < PORT_TTY; j++) {
 		port.pt_names[j] = cp;
-		while (('\0' != *cp) && (':' != *cp) && (',' != *cp)) {
-			cp++;
-		}
-
-		if ('\0' == *cp) {
+		cp = strpbrk(cp, ":,");
+		if (cp == NULL)
 			goto again;	/* line format error */
-		}
 
 		if (':' == *cp) {	/* end of tty name list */
 			break;
@@ -172,13 +168,13 @@ static struct port *getportent (void)
 	}
 	*cp = '\0';
 	cp++;
-	port.pt_names[j + 1] = (char *) 0;
+	port.pt_names[j] = NULL;
 
 	/*
 	 * Get the list of user names.  It is the second colon
 	 * separated field, and is a comma separated list of user
 	 * names.  The entry '*' is used to specify all usernames.
-	 * The last entry in the list is a (char *) 0 pointer.
+	 * The last entry in the list is a NULL pointer.
 	 */
 
 	if (':' != *cp) {
@@ -243,9 +239,7 @@ static struct port *getportent (void)
 		 * week or the other two values.
 		 */
 
-		for (i = 0;
-		     ('\0' != cp[i]) && ('\0' != cp[i + 1]) && isalpha (cp[i]);
-		     i += 2) {
+		for (i = 0; isalpha(cp[i]) && ('\0' != cp[i + 1]); i += 2) {
 			switch ((cp[i] << 8) | (cp[i + 1])) {
 			case ('S' << 8) | 'u':
 				port.pt_times[j].t_days |= 01;
@@ -294,7 +288,7 @@ static struct port *getportent (void)
 		 * representing the times of day.
 		 */
 
-		for (dtime = 0; ('\0' != cp[i]) && isdigit (cp[i]); i++) {
+		for (dtime = 0; isdigit (cp[i]); i++) {
 			dtime = dtime * 10 + cp[i] - '0';
 		}
 
@@ -304,9 +298,7 @@ static struct port *getportent (void)
 		port.pt_times[j].t_start = dtime;
 		cp = cp + i + 1;
 
-		for (dtime = 0, i = 0;
-		     ('\0' != cp[i]) && isdigit (cp[i]);
-		     i++) {
+		for (dtime = 0, i = 0; isdigit (cp[i]); i++) {
 			dtime = dtime * 10 + cp[i] - '0';
 		}
 
diff --git a/lib/prefix_flag.c b/lib/prefix_flag.c
new file mode 100644
index 0000000..bba7102
--- /dev/null
+++ b/lib/prefix_flag.c
@@ -0,0 +1,360 @@
+/*
+ * SPDX-FileCopyrightText: 2011       , Julian Pidancet
+ * SPDX-FileCopyrightText: 2011       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <assert.h>
+
+#include "defines.h"
+#include "alloc.h"
+#include "prototypes.h"
+/*@-exitarg@*/
+#include "exitcodes.h"
+#include "groupio.h"
+#include "pwio.h"
+#ifdef	SHADOWGRP
+#include "sgroupio.h"
+#endif
+#include "shadowio.h"
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif				/* ENABLE_SUBIDS */
+#include "getdef.h"
+#include "shadowlog.h"
+#include "string/sprintf.h"
+
+
+static char *passwd_db_file = NULL;
+static char *spw_db_file = NULL;
+static char *group_db_file = NULL;
+static char *sgroup_db_file = NULL;
+static char *suid_db_file = NULL;
+static char *sgid_db_file = NULL;
+static char *def_conf_file = NULL;
+static FILE* fp_pwent = NULL;
+static FILE* fp_grent = NULL;
+
+/*
+ * process_prefix_flag - prefix all paths if given the --prefix option
+ *
+ * This shall be called before accessing the passwd, group, shadow,
+ * gshadow, useradd's default, login.defs files (non exhaustive list)
+ * or authenticating the caller.
+ *
+ * The audit, syslog, or locale files shall be open before
+ */
+extern const char* process_prefix_flag (const char* short_opt, int argc, char **argv)
+{
+	/*
+	 * Parse the command line options.
+	 */
+	int i;
+	const char *prefix = NULL, *val;
+
+	for (i = 0; i < argc; i++) {
+		val = NULL;
+		if (   (strcmp (argv[i], "--prefix") == 0)
+		    || ((strncmp (argv[i], "--prefix=", 9) == 0)
+			&& (val = argv[i] + 9))
+		    || (strcmp (argv[i], short_opt) == 0)) {
+			if (NULL != prefix) {
+				fprintf (log_get_logfd(),
+				         _("%s: multiple --prefix options\n"),
+				         log_get_progname());
+				exit (E_BAD_ARG);
+			}
+
+			if (val) {
+				prefix = val;
+			} else if (i + 1 == argc) {
+				fprintf (log_get_logfd(),
+				         _("%s: option '%s' requires an argument\n"),
+				         log_get_progname(), argv[i]);
+				exit (E_BAD_ARG);
+			} else {
+				prefix = argv[++ i];
+			}
+		}
+	}
+
+
+
+	if (prefix != NULL) {
+		/* Drop privileges */
+		if (   (setregid (getgid (), getgid ()) != 0)
+		    || (setreuid (getuid (), getuid ()) != 0)) {
+			fprintf (log_get_logfd(),
+			         _("%s: failed to drop privileges (%s)\n"),
+			         log_get_progname(), strerror (errno));
+			exit (EXIT_FAILURE);
+		}
+
+		if ( prefix[0] == '\0' || !strcmp(prefix, "/"))
+			return ""; /* if prefix is "/" then we ignore the flag option */
+		/* should we prevent symbolic link from being used as a prefix? */
+
+		if ( prefix[0] != '/') {
+			fprintf (log_get_logfd(),
+				 _("%s: prefix must be an absolute path\n"),
+				 log_get_progname());
+			exit (E_BAD_ARG);
+		}
+
+		xasprintf(&passwd_db_file, "%s/%s", prefix, PASSWD_FILE);
+		pw_setdbname(passwd_db_file);
+
+		xasprintf(&group_db_file, "%s/%s", prefix, GROUP_FILE);
+		gr_setdbname(group_db_file);
+
+#ifdef  SHADOWGRP
+		xasprintf(&sgroup_db_file, "%s/%s", prefix, SGROUP_FILE);
+		sgr_setdbname(sgroup_db_file);
+#endif
+
+		xasprintf(&spw_db_file, "%s/%s", prefix, SHADOW_FILE);
+		spw_setdbname(spw_db_file);
+
+#ifdef ENABLE_SUBIDS
+		xasprintf(&suid_db_file, "%s/%s", prefix, SUBUID_FILE);
+		sub_uid_setdbname(suid_db_file);
+
+		xasprintf(&sgid_db_file, "%s/%s", prefix, SUBGID_FILE);
+		sub_gid_setdbname(sgid_db_file);
+#endif
+
+#ifdef USE_ECONF
+		setdef_config_file(prefix);
+#else
+		xasprintf(&def_conf_file, "%s/%s", prefix, "/etc/login.defs");
+		setdef_config_file(def_conf_file);
+#endif
+	}
+
+	if (prefix == NULL)
+		return "";
+	return prefix;
+}
+
+
+extern struct group *prefix_getgrnam(const char *name)
+{
+	if (group_db_file) {
+		FILE* fg;
+		struct group * grp = NULL;
+
+		fg = fopen(group_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((grp = fgetgrent(fg)) != NULL) {
+			if (!strcmp(name, grp->gr_name))
+				break;
+		}
+		fclose(fg);
+		return grp;
+	}
+
+	return getgrnam(name);
+}
+
+extern struct group *prefix_getgrgid(gid_t gid)
+{
+	if (group_db_file) {
+		FILE* fg;
+		struct group * grp = NULL;
+
+		fg = fopen(group_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((grp = fgetgrent(fg)) != NULL) {
+			if (gid == grp->gr_gid)
+				break;
+		}
+		fclose(fg);
+		return grp;
+	}
+
+	return getgrgid(gid);
+}
+
+extern struct passwd *prefix_getpwuid(uid_t uid)
+{
+	if (passwd_db_file) {
+		FILE* fg;
+		struct passwd *pwd = NULL;
+
+		fg = fopen(passwd_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((pwd = fgetpwent(fg)) != NULL) {
+			if (uid == pwd->pw_uid)
+				break;
+		}
+		fclose(fg);
+		return pwd;
+	}
+	else {
+		return getpwuid(uid);
+	}
+}
+extern struct passwd *prefix_getpwnam(const char* name)
+{
+	if (passwd_db_file) {
+		FILE* fg;
+		struct passwd *pwd = NULL;
+
+		fg = fopen(passwd_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((pwd = fgetpwent(fg)) != NULL) {
+			if (!strcmp(name, pwd->pw_name))
+				break;
+		}
+		fclose(fg);
+		return pwd;
+	}
+	else {
+		return getpwnam(name);
+	}
+}
+#if HAVE_FGETPWENT_R
+extern int prefix_getpwnam_r(const char* name, struct passwd* pwd,
+                             char* buf, size_t buflen, struct passwd** result)
+{
+	if (passwd_db_file) {
+		FILE* fg;
+		int ret = 0;
+
+		fg = fopen(passwd_db_file, "rt");
+		if (!fg)
+			return errno;
+		while ((ret = fgetpwent_r(fg, pwd, buf, buflen, result)) == 0) {
+			if (!strcmp(name, pwd->pw_name))
+				break;
+		}
+		fclose(fg);
+		return ret;
+	}
+	else {
+		return getpwnam_r(name, pwd, buf, buflen, result);
+	}
+}
+#endif
+extern struct spwd *prefix_getspnam(const char* name)
+{
+	if (spw_db_file) {
+		FILE* fg;
+		struct spwd *sp = NULL;
+
+		fg = fopen(spw_db_file, "rt");
+		if (!fg)
+			return NULL;
+		while ((sp = fgetspent(fg)) != NULL) {
+			if (!strcmp(name, sp->sp_namp))
+				break;
+		}
+		fclose(fg);
+		return sp;
+	}
+	else {
+		return getspnam(name);
+	}
+}
+
+extern void prefix_setpwent(void)
+{
+	if (!passwd_db_file) {
+		setpwent();
+		return;
+	}
+	if (fp_pwent)
+		fclose (fp_pwent);
+
+	fp_pwent = fopen(passwd_db_file, "rt");
+	if (!fp_pwent)
+		return;
+}
+extern struct passwd* prefix_getpwent(void)
+{
+	if (!passwd_db_file) {
+		return getpwent();
+	}
+	if (!fp_pwent) {
+		return NULL;
+	}
+	return fgetpwent(fp_pwent);
+}
+extern void prefix_endpwent(void)
+{
+	if (!passwd_db_file) {
+		endpwent();
+		return;
+	}
+	if (fp_pwent)
+		fclose(fp_pwent);
+	fp_pwent = NULL;
+}
+
+extern void prefix_setgrent(void)
+{
+	if (!group_db_file) {
+		setgrent();
+		return;
+	}
+	if (fp_grent)
+		fclose (fp_grent);
+
+	fp_grent = fopen(group_db_file, "rt");
+	if (!fp_grent)
+		return;
+}
+extern struct group* prefix_getgrent(void)
+{
+	if (!group_db_file) {
+		return getgrent();
+	}
+	return fgetgrent(fp_grent);
+}
+extern void prefix_endgrent(void)
+{
+	if (!group_db_file) {
+		endgrent();
+		return;
+	}
+	if (fp_grent)
+		fclose(fp_grent);
+	fp_grent = NULL;
+}
+
+extern struct group *prefix_getgr_nam_gid(const char *grname)
+{
+	char          *end;
+	long long     gid;
+	struct group  *g;
+
+	if (NULL == grname) {
+		return NULL;
+	}
+
+	if (!group_db_file)
+		return getgr_nam_gid(grname);
+
+	errno = 0;
+	gid = strtoll(grname, &end, 10);
+	if (   ('\0' != *grname)
+	    && ('\0' == *end)
+	    && (0 == errno)
+	    && (gid == (gid_t)gid))
+	{
+		return prefix_getgrgid(gid);
+	}
+
+	g = prefix_getgrnam(grname);
+	return g ? __gr_dup(g) : NULL;
+}
diff --git a/lib/prototypes.h b/lib/prototypes.h
index 1172b5d..5c56e77 100644
--- a/lib/prototypes.h
+++ b/lib/prototypes.h
@@ -10,7 +10,7 @@
 /*
  * prototypes.h
  *
- * prototypes of libmisc functions, and private lib functions.
+ * prototypes of some lib functions, and private lib functions.
  *
  * $Id$
  *
@@ -21,18 +21,17 @@
 
 #include <config.h>
 
+#include <sys/socket.h>
 #include <sys/stat.h>
-#ifdef USE_UTMPX
-#include <utmpx.h>
-#else
-#include <utmp.h>
-#endif
 #include <sys/types.h>
 #include <pwd.h>
 #include <grp.h>
 #include <shadow.h>
+#ifdef ENABLE_LASTLOG
 #include <lastlog.h>
+#endif /* ENABLE_LASTLOG */
 
+#include "attr.h"
 #include "defines.h"
 #include "commonio.h"
 
@@ -44,6 +43,7 @@ extern int add_groups (const char *);
 /* age.c */
 extern void agecheck (/*@null@*/const struct spwd *);
 extern int expire (const struct passwd *, /*@null@*/const struct spwd *);
+
 /* isexpired.c */
 extern int isexpired (const struct passwd *, /*@null@*/const struct spwd *);
 
@@ -92,11 +92,11 @@ void cleanup_report_del_group_gshadow (void *group_name);
 void cleanup_report_mod_passwd (void *cleanup_info);
 void cleanup_report_mod_group (void *cleanup_info);
 void cleanup_report_mod_gshadow (void *cleanup_info);
-void cleanup_unlock_group (/*@null@*/void *unused);
+void cleanup_unlock_group (/*@null@*/void *MAYBE_UNUSED);
 #ifdef SHADOWGRP
-void cleanup_unlock_gshadow (/*@null@*/void *unused);
+void cleanup_unlock_gshadow (/*@null@*/void *MAYBE_UNUSED);
 #endif
-void cleanup_unlock_passwd (/*@null@*/void *unused);
+void cleanup_unlock_passwd (/*@null@*/void *MAYBE_UNUSED);
 
 /* console.c */
 extern bool console (const char *);
@@ -108,21 +108,18 @@ extern int copy_tree (const char *src_root, const char *dst_root,
                       uid_t old_uid, uid_t new_uid,
                       gid_t old_gid, gid_t new_gid);
 
-/* date_to_str.c */
-extern void date_to_str (size_t size, char buf[size], long date);
-
 /* encrypt.c */
 extern /*@exposed@*//*@null@*/char *pw_encrypt (const char *, const char *);
 
-/* entry.c */
-extern void pw_entry (const char *, struct passwd *);
-
 /* env.c */
 extern void addenv (const char *, /*@null@*/const char *);
 extern void initenv (void);
 extern void set_env (int, char *const *);
 extern void sanitize_env (void);
 
+/* fd.c */
+extern void check_fds (void);
+
 /* fields.c */
 extern void change_field (char *, size_t, const char *);
 extern int valid_field (const char *, const char *);
@@ -152,11 +149,10 @@ extern int get_gid (const char *gidstr, gid_t *gid);
 /* getgr_nam_gid.c */
 extern /*@only@*//*@null@*/struct group *getgr_nam_gid (/*@null@*/const char *grname);
 
-/* getlong.c */
-extern int getlong (const char *numstr, /*@out@*/long int *result);
-
 /* get_pid.c */
 extern int get_pid (const char *pidstr, pid_t *pid);
+extern int get_pidfd_from_fd(const char *pidfdstr);
+extern int open_pidfd(const char *pidstr);
 
 /* getrange */
 extern int getrange (const char *range,
@@ -169,11 +165,9 @@ extern time_t gettime (void);
 /* get_uid.c */
 extern int get_uid (const char *uidstr, uid_t *uid);
 
-/* getulong.c */
-extern int getulong (const char *numstr, /*@out@*/unsigned long int *result);
-
 /* fputsx.c */
-extern /*@null@*/char *fgetsx (/*@returned@*/ /*@out@*/char *, int, FILE *);
+ATTR_ACCESS(write_only, 1, 2)
+extern /*@null@*/char *fgetsx(/*@returned@*/char *restrict, int, FILE *restrict);
 extern int fputsx (const char *, FILE *);
 
 /* groupio.c */
@@ -185,8 +179,7 @@ extern void __gr_set_changed (void);
 /* groupmem.c */
 extern /*@null@*/ /*@only@*/struct group *__gr_dup (const struct group *grent);
 extern void gr_free_members (struct group *grent);
-extern void gr_free (/*@out@*/ /*@only@*/struct group *grent);
-extern bool gr_append_member (struct group *grp, char *member);
+extern void gr_free(/*@only@*/struct group *grent);
 
 /* hushed.c */
 extern bool hushed (const char *username);
@@ -212,24 +205,26 @@ extern void setup_limits (const struct passwd *);
 #endif
 
 /* list.c */
-extern /*@only@*/ /*@out@*/char **add_list (/*@returned@*/ /*@only@*/char **, const char *);
-extern /*@only@*/ /*@out@*/char **del_list (/*@returned@*/ /*@only@*/char **, const char *);
-extern /*@only@*/ /*@out@*/char **dup_list (char *const *);
+extern /*@only@*/char **add_list (/*@returned@*/ /*@only@*/char **, const char *);
+extern /*@only@*/char **del_list (/*@returned@*/ /*@only@*/char **, const char *);
+extern /*@only@*/char **dup_list (char *const *);
 extern bool is_on_list (char *const *list, const char *member);
 extern /*@only@*/char **comma_to_list (const char *);
 
+#ifdef ENABLE_LASTLOG
 /* log.c */
 extern void dolastlog (
 	struct lastlog *ll,
 	const struct passwd *pw,
 	/*@unique@*/const char *line,
 	/*@unique@*/const char *host);
+#endif /* ENABLE_LASTLOG */
 
 /* login_nopam.c */
 extern int login_access (const char *user, const char *from);
 
 /* loginprompt.c */
-extern void login_prompt (const char *, char *, int);
+extern void login_prompt (char *, int);
 
 /* mail.c */
 extern void mailcheck (void);
@@ -304,9 +299,7 @@ extern int do_pam_passwd_non_interactive (const char *pam_service,
 #endif				/* USE_PAM */
 
 /* obscure.c */
-#ifndef USE_PAM
 extern bool obscure (const char *, const char *, const struct passwd *);
-#endif
 
 /* pam_pass.c */
 #ifdef USE_PAM
@@ -322,6 +315,10 @@ extern struct group *prefix_getgrnam(const char *name);
 extern struct group *prefix_getgrgid(gid_t gid);
 extern struct passwd *prefix_getpwuid(uid_t uid);
 extern struct passwd *prefix_getpwnam(const char* name);
+#if HAVE_FGETPWENT_R
+extern int prefix_getpwnam_r(const char* name, struct passwd* pwd,
+                             char* buf, size_t buflen, struct passwd** result);
+#endif
 extern struct spwd *prefix_getspnam(const char* name);
 extern struct group *prefix_getgr_nam_gid(const char *grname);
 extern void prefix_setpwent(void);
@@ -332,9 +329,7 @@ extern struct group* prefix_getgrent(void);
 extern void prefix_endgrent(void);
 
 /* pwd2spwd.c */
-#ifndef USE_PAM
 extern struct spwd *pwd_to_spwd (const struct passwd *);
-#endif
 
 /* pwdcheck.c */
 #ifndef USE_PAM
@@ -351,14 +346,19 @@ extern /*@dependent@*/ /*@null@*/struct commonio_entry *__pw_get_head (void);
 
 /* pwmem.c */
 extern /*@null@*/ /*@only@*/struct passwd *__pw_dup (const struct passwd *pwent);
-extern void pw_free (/*@out@*/ /*@only@*/struct passwd *pwent);
+extern void pw_free(/*@only@*/struct passwd *pwent);
+
+/* csrand.c */
+unsigned long csrand (void);
+unsigned long csrand_uniform (unsigned long n);
+unsigned long csrand_interval (unsigned long min, unsigned long max);
 
 /* remove_tree.c */
 extern int remove_tree (const char *root, bool remove_root);
 
 /* rlogin.c */
-extern int do_rlogin (const char *remote_host, char *name, size_t namelen,
-                      char *term, size_t termlen);
+extern int do_rlogin(const char *remote_host, char *name, size_t namesize,
+                     char *term, size_t termsize);
 
 /* root_flag.c */
 extern void process_root_flag (const char* short_opt, int argc, char **argv);
@@ -376,7 +376,7 @@ extern int check_selinux_permit (const char *perm_name);
 
 /* semanage.c */
 #ifdef WITH_SELINUX
-extern int set_seuser(const char *login_name, const char *seuser_name);
+extern int set_seuser(const char *login_name, const char *seuser_name, const char *serange);
 extern int del_seuser(const char *login_name);
 #endif
 
@@ -409,7 +409,7 @@ extern struct spwd *sgetspent (const char *string);
 /* sgroupio.c */
 extern void __sgr_del_entry (const struct commonio_entry *ent);
 extern /*@null@*/ /*@only@*/struct sgrp *__sgr_dup (const struct sgrp *sgent);
-extern void sgr_free (/*@out@*/ /*@only@*/struct sgrp *sgent);
+extern void sgr_free(/*@only@*/struct sgrp *sgent);
 extern /*@dependent@*/ /*@null@*/struct commonio_entry *__sgr_get_head (void);
 extern void __sgr_set_changed (void);
 
@@ -419,14 +419,15 @@ extern void __spw_del_entry (const struct commonio_entry *ent);
 
 /* shadowmem.c */
 extern /*@null@*/ /*@only@*/struct spwd *__spw_dup (const struct spwd *spent);
-extern void spw_free (/*@out@*/ /*@only@*/struct spwd *spent);
+extern void spw_free(/*@only@*/struct spwd *spent);
 
 /* shell.c */
 extern int shell (const char *file, /*@null@*/const char *arg, char *const envp[]);
 
 /* spawn.c */
-extern int run_command (const char *cmd, const char *argv[],
-                        /*@null@*/const char *envp[], /*@out@*/int *status);
+ATTR_ACCESS(write_only, 4)
+extern int run_command(const char *cmd, const char *argv[],
+                       /*@null@*/const char *envp[], int *restrict status);
 
 /* strtoday.c */
 extern long strtoday (const char *);
@@ -459,33 +460,68 @@ extern int set_filesize_limit (int blocks);
 /* user_busy.c */
 extern int user_busy (const char *name, uid_t uid);
 
-/* utmp.c */
-#ifndef USE_UTMPX
-extern /*@null@*/struct utmp *get_current_utmp (void);
-extern struct utmp *prepare_utmp (const char *name,
-                                  const char *line,
-                                  const char *host,
-                                  /*@null@*/const struct utmp *ut);
-extern int setutmp (struct utmp *ut);
-#else
-extern /*@null@*/struct utmpx *get_current_utmp (void);
-extern struct utmpx *prepare_utmpx (const char *name,
-                                    const char *line,
-                                    const char *host,
-                                    /*@null@*/const struct utmpx *ut);
-extern int setutmpx (struct utmpx *utx);
-#endif				/* USE_UTMPX */
+/*
+ * Session management: utmp.c or logind.c
+ */
+
+/**
+ * @brief Get host for the current session
+ *
+ * @param[out] out Host name
+ *
+ * @return 0 or a positive integer if the host was obtained properly,
+ *         another value on error.
+ */
+extern int get_session_host (char **out);
+#ifndef ENABLE_LOGIND
+/**
+ * @brief Update or create an utmp entry in utmp, wtmp, utmpw, or wtmpx
+ *
+ * @param[in] user username
+ * @param[in] tty tty
+ * @param[in] host hostname
+ *
+ * @return 0 if utmp was updated properly,
+ *         1 on error.
+ */
+extern int update_utmp (const char *user,
+                        const char *tty,
+                        const char *host);
+/**
+ * @brief Update the cumulative failure log
+ *
+ * @param[in] failent_user username
+ * @param[in] tty tty
+ * @param[in] host hostname
+ *
+ */
+extern void record_failure(const char *failent_user,
+                           const char *tty,
+                           const char *hostname);
+#endif /* ENABLE_LOGIND */
+
+/**
+ * @brief Number of active user sessions
+ *
+ * @param[in] name username
+ * @param[in] limit maximum number of active sessions
+ *
+ * @return number of active sessions.
+ *
+ */
+extern unsigned long active_sessions_count(const char *name,
+                                           unsigned long limit);
 
 /* valid.c */
 extern bool valid (const char *, const struct passwd *);
 
-/* xmalloc.c */
-extern /*@maynotreturn@*/ /*@only@*//*@out@*//*@notnull@*/void *xmalloc (size_t size)
-  /*@ensures MaxSet(result) == (size - 1); @*/;
-extern /*@maynotreturn@*/ /*@only@*//*@notnull@*/char *xstrdup (const char *);
+/* write_full.c */
+extern int write_full(int fd, const void *buf, size_t count);
 
 /* xgetpwnam.c */
 extern /*@null@*/ /*@only@*/struct passwd *xgetpwnam (const char *);
+/* xprefix_getpwnam.c */
+extern /*@null@*/ /*@only@*/struct passwd *xprefix_getpwnam (const char *);
 /* xgetpwuid.c */
 extern /*@null@*/ /*@only@*/struct passwd *xgetpwuid (uid_t);
 /* xgetgrnam.c */
diff --git a/lib/pwauth.c b/lib/pwauth.c
index 62de472..0cd3412 100644
--- a/lib/pwauth.c
+++ b/lib/pwauth.c
@@ -18,21 +18,26 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <unistd.h>
-#include "prototypes.h"
+
+#include "agetpass.h"
 #include "defines.h"
+#include "memzero.h"
+#include "prototypes.h"
 #include "pwauth.h"
 #include "getdef.h"
+#include "string/sprintf.h"
+
 #ifdef SKEY
 #include <skey.h>
 #endif
+
+
 #ifdef __linux__		/* standard password prompt by default */
 static const char *PROMPT = gettext_noop ("Password: ");
 #else
 static const char *PROMPT = gettext_noop ("%s's Password: ");
 #endif
 
-bool wipe_clear_pass = true;
-/*@null@*/char *clear_pass = NULL;
 
 /*
  * pw_auth - perform getpass/crypt authentication
@@ -47,16 +52,16 @@ int pw_auth (const char *cipher,
              int reason,
              /*@null@*/const char *input)
 {
-	char prompt[1024];
-	char *clear = NULL;
-	const char *cp;
-	const char *encrypted;
-	int retval;
+	int          retval;
+	char         prompt[1024];
+	char         *clear = NULL;
+	const char   *cp;
+	const char   *encrypted;
 
 #ifdef	SKEY
-	bool use_skey = false;
-	char challenge_info[40];
-	struct skey skey;
+	bool         use_skey = false;
+	char         challenge_info[40];
+	struct skey  skey;
 #endif
 
 	/*
@@ -137,15 +142,9 @@ int pw_auth (const char *cipher,
 		}
 #endif
 
-		snprintf (prompt, sizeof prompt, cp, user);
-		clear = getpass (prompt);
-		if (NULL == clear) {
-			static char c[1];
-
-			c[0] = '\0';
-			clear = c;
-		}
-		input = clear;
+		SNPRINTF(prompt, cp, user);
+		clear = agetpass(prompt);
+		input = (clear == NULL) ? "" : clear;
 	}
 
 	/*
@@ -171,14 +170,9 @@ int pw_auth (const char *cipher,
 	 * -- AR 8/22/1999
 	 */
 	if ((0 != retval) && ('\0' == input[0]) && use_skey) {
-		clear = getpass (prompt);
-		if (NULL == clear) {
-			static char c[1];
-
-			c[0] = '\0';
-			clear = c;
-		}
-		input = clear;
+		erase_pass(clear);
+		clear = agetpass(prompt);
+		input = (clear == NULL) ? "" : clear;
 	}
 
 	if ((0 != retval) && use_skey) {
@@ -192,20 +186,10 @@ int pw_auth (const char *cipher,
 		}
 	}
 #endif
+	erase_pass(clear);
 
-	/*
-	 * Things like RADIUS authentication may need the password -
-	 * if the external variable wipe_clear_pass is zero, we will
-	 * not wipe it (the caller should wipe clear_pass when it is
-	 * no longer needed).  --marekm
-	 */
-
-	clear_pass = clear;
-	if (wipe_clear_pass && (NULL != clear) && ('\0' != *clear)) {
-		strzero (clear);
-	}
 	return retval;
 }
 #else				/* !USE_PAM */
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/* !USE_PAM */
diff --git a/lib/pwd2spwd.c b/lib/pwd2spwd.c
new file mode 100644
index 0000000..eea9519
--- /dev/null
+++ b/lib/pwd2spwd.c
@@ -0,0 +1,62 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+
+/*
+ * pwd_to_spwd - create entries for new spwd structure
+ *
+ *	pwd_to_spwd() creates a new (struct spwd) containing the
+ *	information in the pointed-to (struct passwd).
+ */
+
+struct spwd *pwd_to_spwd (const struct passwd *pw)
+{
+	static struct spwd sp;
+
+	/*
+	 * Nice, easy parts first.  The name and passwd map directly
+	 * from the old password structure to the new one.
+	 */
+	sp.sp_namp = pw->pw_name;
+	sp.sp_pwdp = pw->pw_passwd;
+
+	{
+		/*
+		 * Defaults used if there is no pw_age information.
+		 */
+		sp.sp_min = 0;
+		sp.sp_max = 10000;
+		sp.sp_lstchg = gettime () / DAY;
+		if (0 == sp.sp_lstchg) {
+			/* Better disable aging than requiring a password
+			 * change */
+			sp.sp_lstchg = -1;
+		}
+	}
+
+	/*
+	 * These fields have no corresponding information in the password
+	 * file.  They are set to uninitialized values.
+	 */
+	sp.sp_warn = -1;
+	sp.sp_expire = -1;
+	sp.sp_inact = -1;
+	sp.sp_flag = SHADOW_SP_FLAG_UNSET;
+
+	return &sp;
+}
+
diff --git a/lib/pwd_init.c b/lib/pwd_init.c
new file mode 100644
index 0000000..b3f94e1
--- /dev/null
+++ b/lib/pwd_init.c
@@ -0,0 +1,56 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1997       , Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "defines.h"
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/resource.h>
+
+#include "prototypes.h"
+
+/*
+ * pwd_init - ignore signals, and set resource limits to safe
+ * values.  Call this before modifying password files, so that
+ * it is less likely to fail in the middle of operation.
+ */
+void pwd_init (void)
+{
+	struct rlimit rlim;
+
+	rlim.rlim_cur = rlim.rlim_max = 0;
+	setrlimit (RLIMIT_CORE, &rlim);
+
+	rlim.rlim_cur = rlim.rlim_max = RLIM_INFINITY;
+	setrlimit (RLIMIT_AS, &rlim);
+
+	setrlimit (RLIMIT_CPU, &rlim);
+	setrlimit (RLIMIT_DATA, &rlim);
+	setrlimit (RLIMIT_FSIZE, &rlim);
+	setrlimit (RLIMIT_NOFILE, &rlim);
+#ifdef RLIMIT_RSS
+	setrlimit (RLIMIT_RSS, &rlim);
+#endif
+	setrlimit (RLIMIT_STACK, &rlim);
+
+	signal (SIGALRM, SIG_IGN);
+	signal (SIGHUP, SIG_IGN);
+	signal (SIGINT, SIG_IGN);
+	signal (SIGPIPE, SIG_IGN);
+	signal (SIGQUIT, SIG_IGN);
+	signal (SIGTERM, SIG_IGN);
+	signal (SIGTSTP, SIG_IGN);
+	signal (SIGTTOU, SIG_IGN);
+
+	umask (077);
+}
diff --git a/lib/pwdcheck.c b/lib/pwdcheck.c
new file mode 100644
index 0000000..93c9f5c
--- /dev/null
+++ b/lib/pwdcheck.c
@@ -0,0 +1,40 @@
+/*
+ * SPDX-FileCopyrightText: 2000 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2008, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#ifndef USE_PAM
+
+#include <stdio.h>
+#include <shadow.h>
+
+#include "attr.h"
+#include "prototypes.h"
+#include "defines.h"
+#include "pwauth.h"
+#include "shadowlog.h"
+
+void passwd_check (const char *user, const char *passwd, MAYBE_UNUSED const char *progname)
+{
+	struct spwd *sp;
+
+	sp = getspnam (user); /* !USE_PAM, no need for xgetspnam */
+	if (NULL != sp) {
+		passwd = sp->sp_pwdp;
+	}
+	if (pw_auth (passwd, user, PW_LOGIN, NULL) != 0) {
+		SYSLOG ((LOG_WARN, "incorrect password for `%s'", user));
+		(void) sleep (1);
+		fprintf (log_get_logfd(), _("Incorrect password for %s.\n"), user);
+		exit (EXIT_FAILURE);
+	}
+}
+#else			/* USE_PAM */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif			/* USE_PAM */
diff --git a/lib/pwio.c b/lib/pwio.c
index e59b473..3497c75 100644
--- a/lib/pwio.c
+++ b/lib/pwio.c
@@ -26,7 +26,8 @@ static /*@null@*/ /*@only@*/void *passwd_dup (const void *ent)
 	return __pw_dup (pw);
 }
 
-static void passwd_free (/*@out@*/ /*@only@*/void *ent)
+static void
+passwd_free(/*@only@*/void *ent)
 {
 	struct passwd *pw = ent;
 
@@ -42,7 +43,7 @@ static const char *passwd_getname (const void *ent)
 
 static void *passwd_parse (const char *line)
 {
-	return (void *) sgetpwent (line);
+	return sgetpwent (line);
 }
 
 static int passwd_put (const void *ent, FILE * file)
@@ -137,7 +138,7 @@ int pw_open (int mode)
 
 int pw_update (const struct passwd *pw)
 {
-	return commonio_update (&passwd_db, (const void *) pw);
+	return commonio_update (&passwd_db, pw);
 }
 
 int pw_remove (const char *name)
@@ -182,15 +183,23 @@ struct commonio_db *__pw_get_db (void)
 
 static int pw_cmp (const void *p1, const void *p2)
 {
+	const struct commonio_entry *const *ce1;
+	const struct commonio_entry *const *ce2;
+	const struct passwd *pw1, *pw2;
 	uid_t u1, u2;
 
-	if ((*(struct commonio_entry **) p1)->eptr == NULL)
+	ce1 = p1;
+	pw1 = (*ce1)->eptr;
+	if (pw1 == NULL)
 		return 1;
-	if ((*(struct commonio_entry **) p2)->eptr == NULL)
+
+	ce2 = p2;
+	pw2 = (*ce2)->eptr;
+	if (pw2 == NULL)
 		return -1;
 
-	u1 = ((struct passwd *) (*(struct commonio_entry **) p1)->eptr)->pw_uid;
-	u2 = ((struct passwd *) (*(struct commonio_entry **) p2)->eptr)->pw_uid;
+	u1 = pw1->pw_uid;
+	u2 = pw2->pw_uid;
 
 	if (u1 < u2)
 		return -1;
diff --git a/lib/pwmem.c b/lib/pwmem.c
index 867e3f7..9c6e58d 100644
--- a/lib/pwmem.c
+++ b/lib/pwmem.c
@@ -13,7 +13,10 @@
 #ident "$Id$"
 
 #include <stdio.h>
+
+#include "alloc.h"
 #include "defines.h"
+#include "memzero.h"
 #include "prototypes.h"
 #include "pwio.h"
 
@@ -21,12 +24,11 @@
 {
 	struct passwd *pw;
 
-	pw = (struct passwd *) malloc (sizeof *pw);
+	pw = CALLOC (1, struct passwd);
 	if (NULL == pw) {
 		return NULL;
 	}
 	/* The libc might define other fields. They won't be copied. */
-	memset (pw, 0, sizeof *pw);
 	pw->pw_uid = pwent->pw_uid;
 	pw->pw_gid = pwent->pw_gid;
 	/*@-mustfreeonly@*/
@@ -68,7 +70,8 @@
 	return pw;
 }
 
-void pw_free (/*@out@*/ /*@only@*/struct passwd *pwent)
+void
+pw_free(/*@only@*/struct passwd *pwent)
 {
 	if (pwent != NULL) {
 		free (pwent->pw_name);
diff --git a/lib/readpassphrase.c b/lib/readpassphrase.c
new file mode 100644
index 0000000..5ff060c
--- /dev/null
+++ b/lib/readpassphrase.c
@@ -0,0 +1,198 @@
+/*	$OpenBSD: readpassphrase.c,v 1.26 2016/10/18 12:47:18 millert Exp $	*/
+
+/*
+ * Copyright (c) 2000-2002, 2007, 2010
+ *	Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <pwd.h>
+#include <signal.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <readpassphrase.h>
+
+#ifndef TCSASOFT
+#define TCSASOFT 0
+#endif
+
+#ifndef _NSIG
+#if defined(NSIG)
+#define _NSIG NSIG
+#else
+/* The SIGRTMAX define might be set to a function such as sysconf(). */
+#define _NSIG (SIGRTMAX + 1)
+#endif
+#endif
+
+static volatile sig_atomic_t signo[_NSIG];
+
+static void handler(int);
+
+char *
+readpassphrase(const char *prompt, char *buf, size_t bufsiz, int flags)
+{
+	ssize_t nr;
+	int input, output, save_errno, i, need_restart;
+	char ch, *p, *end;
+	struct termios term, oterm;
+	struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
+	struct sigaction savetstp, savettin, savettou, savepipe;
+
+	/* I suppose we could alloc on demand in this case (XXX). */
+	if (bufsiz == 0) {
+		errno = EINVAL;
+		return(NULL);
+	}
+
+restart:
+	for (i = 0; i < _NSIG; i++)
+		signo[i] = 0;
+	nr = -1;
+	save_errno = 0;
+	need_restart = 0;
+	/*
+	 * Read and write to /dev/tty if available.  If not, read from
+	 * stdin and write to stderr unless a tty is required.
+	 */
+	if ((flags & RPP_STDIN) ||
+	    (input = output = open(_PATH_TTY, O_RDWR)) == -1) {
+		if (flags & RPP_REQUIRE_TTY) {
+			errno = ENOTTY;
+			return(NULL);
+		}
+		input = STDIN_FILENO;
+		output = STDERR_FILENO;
+	}
+
+	/*
+	 * Turn off echo if possible.
+	 * If we are using a tty but are not the foreground pgrp this will
+	 * generate SIGTTOU, so do it *before* installing the signal handlers.
+	 */
+	if (input != STDIN_FILENO && tcgetattr(input, &oterm) == 0) {
+		memcpy(&term, &oterm, sizeof(term));
+		if (!(flags & RPP_ECHO_ON))
+			term.c_lflag &= ~(ECHO | ECHONL);
+#ifdef VSTATUS
+		if (term.c_cc[VSTATUS] != _POSIX_VDISABLE)
+			term.c_cc[VSTATUS] = _POSIX_VDISABLE;
+#endif
+		(void)tcsetattr(input, TCSAFLUSH|TCSASOFT, &term);
+	} else {
+		memset(&term, 0, sizeof(term));
+		term.c_lflag |= ECHO;
+		memset(&oterm, 0, sizeof(oterm));
+		oterm.c_lflag |= ECHO;
+	}
+
+	/*
+	 * Catch signals that would otherwise cause the user to end
+	 * up with echo turned off in the shell.  Don't worry about
+	 * things like SIGXCPU and SIGVTALRM for now.
+	 */
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;		/* don't restart system calls */
+	sa.sa_handler = handler;
+	(void)sigaction(SIGALRM, &sa, &savealrm);
+	(void)sigaction(SIGHUP, &sa, &savehup);
+	(void)sigaction(SIGINT, &sa, &saveint);
+	(void)sigaction(SIGPIPE, &sa, &savepipe);
+	(void)sigaction(SIGQUIT, &sa, &savequit);
+	(void)sigaction(SIGTERM, &sa, &saveterm);
+	(void)sigaction(SIGTSTP, &sa, &savetstp);
+	(void)sigaction(SIGTTIN, &sa, &savettin);
+	(void)sigaction(SIGTTOU, &sa, &savettou);
+
+	if (!(flags & RPP_STDIN))
+		(void)write(output, prompt, strlen(prompt));
+	end = buf + bufsiz - 1;
+	p = buf;
+	while ((nr = read(input, &ch, 1)) == 1 && ch != '\n' && ch != '\r') {
+		if (p < end) {
+			if ((flags & RPP_SEVENBIT))
+				ch &= 0x7f;
+			if (isalpha((unsigned char)ch)) {
+				if ((flags & RPP_FORCELOWER))
+					ch = (char)tolower((unsigned char)ch);
+				if ((flags & RPP_FORCEUPPER))
+					ch = (char)toupper((unsigned char)ch);
+			}
+			*p++ = ch;
+		}
+	}
+	*p = '\0';
+	save_errno = errno;
+	if (!(term.c_lflag & ECHO))
+		(void)write(output, "\n", 1);
+
+	/* Restore old terminal settings and signals. */
+	if (memcmp(&term, &oterm, sizeof(term)) != 0) {
+		const int sigttou = signo[SIGTTOU];
+
+		/* Ignore SIGTTOU generated when we are not the fg pgrp. */
+		while (tcsetattr(input, TCSAFLUSH|TCSASOFT, &oterm) == -1 &&
+		    errno == EINTR && !signo[SIGTTOU])
+			continue;
+		signo[SIGTTOU] = sigttou;
+	}
+	(void)sigaction(SIGALRM, &savealrm, NULL);
+	(void)sigaction(SIGHUP, &savehup, NULL);
+	(void)sigaction(SIGINT, &saveint, NULL);
+	(void)sigaction(SIGQUIT, &savequit, NULL);
+	(void)sigaction(SIGPIPE, &savepipe, NULL);
+	(void)sigaction(SIGTERM, &saveterm, NULL);
+	(void)sigaction(SIGTSTP, &savetstp, NULL);
+	(void)sigaction(SIGTTIN, &savettin, NULL);
+	(void)sigaction(SIGTTOU, &savettou, NULL);
+	if (input != STDIN_FILENO)
+		(void)close(input);
+
+	/*
+	 * If we were interrupted by a signal, resend it to ourselves
+	 * now that we have restored the signal handlers.
+	 */
+	for (i = 0; i < _NSIG; i++) {
+		if (signo[i]) {
+			kill(getpid(), i);
+			switch (i) {
+			case SIGTSTP:
+			case SIGTTIN:
+			case SIGTTOU:
+				need_restart = 1;
+			}
+		}
+	}
+	if (need_restart)
+		goto restart;
+
+	if (save_errno)
+		errno = save_errno;
+	return(nr == -1 ? NULL : buf);
+}
+
+static void handler(int s)
+{
+
+	signo[s] = 1;
+}
diff --git a/lib/readpassphrase.h b/lib/readpassphrase.h
new file mode 100644
index 0000000..2530b7f
--- /dev/null
+++ b/lib/readpassphrase.h
@@ -0,0 +1,47 @@
+/*	$OpenBSD: readpassphrase.h,v 1.4 2003/06/03 01:52:39 millert Exp $	*/
+
+/*
+ * Copyright (c) 2000, 2002 Todd C. Miller <Todd.Miller@courtesan.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+#ifndef LIBBSD_READPASSPHRASE_H
+#define LIBBSD_READPASSPHRASE_H
+
+#define RPP_ECHO_OFF    0x00		/* Turn off echo (default). */
+#define RPP_ECHO_ON     0x01		/* Leave echo on. */
+#define RPP_REQUIRE_TTY 0x02		/* Fail if there is no tty. */
+#define RPP_FORCELOWER  0x04		/* Force input to lower case. */
+#define RPP_FORCEUPPER  0x08		/* Force input to upper case. */
+#define RPP_SEVENBIT    0x10		/* Strip the high bit from input. */
+#define RPP_STDIN       0x20		/* Read from stdin, not /dev/tty */
+
+#ifdef LIBBSD_OVERLAY
+#include <sys/cdefs.h>
+#endif
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+char * readpassphrase(const char *, char *, size_t, int);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !LIBBSD_READPASSPHRASE_H */
diff --git a/lib/remove_tree.c b/lib/remove_tree.c
new file mode 100644
index 0000000..3d76b95
--- /dev/null
+++ b/lib/remove_tree.c
@@ -0,0 +1,101 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2001, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include "prototypes.h"
+#include "defines.h"
+
+static int remove_tree_at (int at_fd, const char *path, bool remove_root)
+{
+	DIR *dir;
+	const struct dirent *ent;
+	int dir_fd, rc = 0;
+
+	dir_fd = openat (at_fd, path, O_RDONLY | O_DIRECTORY | O_NOFOLLOW | O_CLOEXEC);
+	if (dir_fd < 0) {
+		return -1;
+	}
+
+	dir = fdopendir (dir_fd);
+	if (!dir) {
+		(void) close (dir_fd);
+		return -1;
+	}
+
+	/*
+	 * Open the source directory and delete each entry.
+	 */
+	while ((ent = readdir (dir))) {
+		struct stat ent_sb;
+
+		/*
+		 * Skip the "." and ".." entries
+		 */
+		if (strcmp (ent->d_name, ".") == 0 ||
+		    strcmp (ent->d_name, "..") == 0) {
+			continue;
+		}
+
+		rc = fstatat (dirfd(dir), ent->d_name, &ent_sb, AT_SYMLINK_NOFOLLOW);
+		if (rc < 0) {
+			break;
+		}
+
+		if (S_ISDIR (ent_sb.st_mode)) {
+			/*
+			 * Recursively delete this directory.
+			 */
+			if (remove_tree_at (dirfd(dir), ent->d_name, true) != 0) {
+				rc = -1;
+				break;
+			}
+		} else {
+			/*
+			 * Delete the file.
+			 */
+			if (unlinkat (dirfd(dir), ent->d_name, 0) != 0) {
+				rc = -1;
+				break;
+			}
+		}
+	}
+
+	(void) closedir (dir);
+
+	if (remove_root && (0 == rc)) {
+		if (unlinkat (at_fd, path, AT_REMOVEDIR) != 0) {
+			rc = -1;
+		}
+	}
+
+	return rc;
+}
+
+/*
+ * remove_tree - delete a directory tree
+ *
+ *	remove_tree() walks a directory tree and deletes all the files
+ *	and directories.
+ *	At the end, it deletes the root directory itself.
+ */
+int remove_tree (const char *root, bool remove_root)
+{
+	return remove_tree_at (AT_FDCWD, root, remove_root);
+}
diff --git a/lib/rlogin.c b/lib/rlogin.c
new file mode 100644
index 0000000..cbc05dd
--- /dev/null
+++ b/lib/rlogin.c
@@ -0,0 +1,135 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2008, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ifdef RLOGIN
+
+#ident "$Id$"
+
+#include "prototypes.h"
+#include "defines.h"
+#include <stdio.h>
+#include <pwd.h>
+#include <netdb.h>
+
+#include "atoi/str2i.h"
+
+
+static struct {
+	int spd_name;
+	int spd_baud;
+} speed_table[] =
+{
+	{ B50, 50},
+	{ B75, 75},
+	{ B110, 110},
+	{ B134, 134},
+	{ B150, 150},
+	{ B200, 200},
+	{ B300, 300},
+	{ B600, 600},
+	{ B1200, 1200},
+	{ B1800, 1800},
+	{ B2400, 2400},
+	{ B4800, 4800},
+	{ B9600, 9600},
+	{ B19200, 19200},
+	{ B38400, 38400},
+	{ -1, -1}
+};
+
+
+static void
+get_remote_string(char *buf, size_t size)
+{
+	for (;;) {
+		if (read (0, buf, 1) != 1) {
+			exit (EXIT_FAILURE);
+		}
+		if ('\0' == *buf) {
+			return;
+		}
+		--size;
+		if (size > 0) {
+			++buf;
+		}
+	}
+	/*NOTREACHED*/
+}
+
+
+int
+do_rlogin(const char *remote_host, char *name, size_t namesize, char *term,
+          size_t termsize)
+{
+	struct passwd *pwd;
+	char remote_name[32];
+	char *cp;
+	unsigned long remote_speed = 9600;
+	int speed_name = B9600;
+	int i;
+	TERMIO termio;
+
+	get_remote_string(remote_name, sizeof(remote_name));
+	get_remote_string(name, namesize);
+	get_remote_string(term, termsize);
+
+	cp = strchr (term, '/');
+	if (NULL != cp) {
+		*cp = '\0';
+		cp++;
+
+		if (str2ul(&remote_speed, cp) == -1)
+			remote_speed = 9600;
+	}
+	for (i = 0;
+	     (   (speed_table[i].spd_baud != remote_speed)
+	      && (speed_table[i].spd_name != -1));
+	     i++);
+
+	if (-1 != speed_table[i].spd_name) {
+		speed_name = speed_table[i].spd_name;
+	}
+
+	/*
+	 * Put the terminal in cooked mode with echo turned on.
+	 */
+
+	GTTY (0, &termio);
+	termio.c_iflag |= ICRNL | IXON;
+	termio.c_oflag |= OPOST | ONLCR;
+	termio.c_lflag |= ICANON | ECHO | ECHOE;
+#ifdef CBAUD
+	termio.c_cflag = (termio.c_cflag & ~CBAUD) | speed_name;
+#else
+	termio.c_cflag = (termio.c_cflag) | speed_name;
+#endif
+	STTY (0, &termio);
+
+	pwd = getpwnam (name); /* local, no need for xgetpwnam */
+	if (NULL == pwd) {
+		return 0;
+	}
+
+	/*
+	 * ruserok() returns 0 for success on modern systems, and 1 on
+	 * older ones.  If you are having trouble with people logging
+	 * in without giving a required password, THIS is the culprit -
+	 * go fix the #define in config.h.
+	 */
+
+#ifndef	RUSEROK
+	return 0;
+#else
+	return ruserok (remote_host, pwd->pw_uid == 0,
+			remote_name, name) == RUSEROK;
+#endif
+}
+#endif				/* RLOGIN */
diff --git a/lib/root_flag.c b/lib/root_flag.c
new file mode 100644
index 0000000..5572831
--- /dev/null
+++ b/lib/root_flag.c
@@ -0,0 +1,108 @@
+/*
+ * SPDX-FileCopyrightText: 2011       , Julian Pidancet
+ * SPDX-FileCopyrightText: 2011       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <assert.h>
+#include "defines.h"
+#include "prototypes.h"
+/*@-exitarg@*/
+#include "exitcodes.h"
+#include "shadowlog.h"
+
+static void change_root (const char* newroot);
+
+/*
+ * process_root_flag - chroot if given the --root option
+ *
+ * This shall be called before accessing the passwd, group, shadow,
+ * gshadow, useradd's default, login.defs files (non exhaustive list)
+ * or authenticating the caller.
+ *
+ * The audit, syslog, or locale files shall be open before
+ */
+extern void process_root_flag (const char* short_opt, int argc, char **argv)
+{
+	/*
+	 * Parse the command line options.
+	 */
+	int i;
+	const char *newroot = NULL, *val;
+
+	for (i = 0; i < argc; i++) {
+		val = NULL;
+		if (   (strcmp (argv[i], "--root") == 0)
+		    || ((strncmp (argv[i], "--root=", 7) == 0)
+			&& (val = argv[i] + 7))
+		    || (strcmp (argv[i], short_opt) == 0)) {
+			if (NULL != newroot) {
+				fprintf (log_get_logfd(),
+				         _("%s: multiple --root options\n"),
+				         log_get_progname());
+				exit (E_BAD_ARG);
+			}
+
+			if (val) {
+				newroot = val;
+			} else if (i + 1 == argc) {
+				fprintf (log_get_logfd(),
+				         _("%s: option '%s' requires an argument\n"),
+				         log_get_progname(), argv[i]);
+				exit (E_BAD_ARG);
+			} else {
+				newroot = argv[++ i];
+			}
+		}
+	}
+
+	if (NULL != newroot) {
+		change_root (newroot);
+	}
+}
+
+static void change_root (const char* newroot)
+{
+	/* Drop privileges */
+	if (   (setregid (getgid (), getgid ()) != 0)
+	    || (setreuid (getuid (), getuid ()) != 0)) {
+		fprintf (log_get_logfd(), _("%s: failed to drop privileges (%s)\n"),
+		         log_get_progname(), strerror (errno));
+		exit (EXIT_FAILURE);
+	}
+
+	if ('/' != newroot[0]) {
+		fprintf (log_get_logfd(),
+		         _("%s: invalid chroot path '%s', only absolute paths are supported.\n"),
+		         log_get_progname(), newroot);
+		exit (E_BAD_ARG);
+	}
+
+	if (access (newroot, F_OK) != 0) {
+		fprintf(log_get_logfd(),
+		        _("%s: cannot access chroot directory %s: %s\n"),
+		        log_get_progname(), newroot, strerror (errno));
+		exit (E_BAD_ARG);
+	}
+
+	if (chroot (newroot) != 0) {
+		fprintf(log_get_logfd(),
+			        _("%s: unable to chroot to directory %s: %s\n"),
+				log_get_progname(), newroot, strerror (errno));
+		exit (E_BAD_ARG);
+	}
+
+	if (chdir ("/") != 0) {
+		fprintf(log_get_logfd(),
+			_("%s: cannot chdir in chroot directory %s: %s\n"),
+		        log_get_progname(), newroot, strerror (errno));
+		exit (E_BAD_ARG);
+	}
+}
+
diff --git a/lib/run_part.c b/lib/run_part.c
index bce11d3..670d815 100644
--- a/lib/run_part.c
+++ b/lib/run_part.c
@@ -1,3 +1,5 @@
+#include <config.h>
+
 #include <dirent.h>
 #include <errno.h>
 #include <stdio.h>
@@ -8,9 +10,12 @@
 #include <sys/wait.h>
 #include <unistd.h>
 #include <lib/prototypes.h>
+
+#include "alloc.h"
 #include "run_part.h"
 #include "shadowlog_internal.h"
 
+
 int run_part (char *script_path, const char *name, const char *action)
 {
 	int pid;
@@ -53,25 +58,22 @@ int run_parts (const char *directory, const char *name, const char *action)
 	}
 
 	for (n=0; n<scanlist; n++) {
-		int path_length;
-		struct stat sb;
+		char         *s;
+		struct stat  sb;
 
-		path_length=strlen(directory) + strlen(namelist[n]->d_name) + 2;
-		char *s = (char*)malloc(path_length);
-		if (!s) {
-			printf ("could not allocate memory\n");
+		if (asprintf(&s, "%s/%s", directory, namelist[n]->d_name) == -1) {
+			fprintf(stderr, "could not allocate memory\n");
 			for (; n<scanlist; n++) {
-				free (namelist[n]);
+				free(namelist[n]);
 			}
-			free (namelist);
+			free(namelist);
 			return (1);
 		}
-		snprintf (s, path_length, "%s/%s", directory, namelist[n]->d_name);
 
 		execute_result = 0;
 		if (stat (s, &sb) == -1) {
 			perror ("stat");
-			free (s);
+			free(s);
 			for (; n<scanlist; n++) {
 				free (namelist[n]);
 			}
@@ -83,7 +85,7 @@ int run_parts (const char *directory, const char *name, const char *action)
 			execute_result = run_part (s, name, action);
 		}
 
-		free (s);
+		free(s);
 
 		if (execute_result!=0) {
 			fprintf (shadow_logfd,
diff --git a/lib/salt.c b/lib/salt.c
new file mode 100644
index 0000000..529d59c
--- /dev/null
+++ b/lib/salt.c
@@ -0,0 +1,452 @@
+/*
+ * SPDX-FileCopyrightText:  Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>
+ * SPDX-FileCopyrightText:  J.T. Conklin <jtc@netbsd.org>
+ *
+ * SPDX-License-Identifier: Unlicense
+ */
+
+/*
+ * salt.c - generate a random salt string for crypt()
+ *
+ * Written by Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>,
+ * it is in the public domain.
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+#include "shadowlog.h"
+
+#if (defined CRYPT_GENSALT_IMPLEMENTS_AUTO_ENTROPY && \
+     CRYPT_GENSALT_IMPLEMENTS_AUTO_ENTROPY)
+#define USE_XCRYPT_GENSALT 1
+#else
+#define USE_XCRYPT_GENSALT 0
+#endif
+
+/* Add the salt prefix. */
+#define MAGNUM(array,ch)	(array)[0]=(array)[2]='$',(array)[1]=(ch),(array)[3]='\0'
+
+#ifdef USE_BCRYPT
+/* Use $2b$ as prefix for compatibility with OpenBSD's bcrypt. */
+#define BCRYPTMAGNUM(array)	(array)[0]=(array)[3]='$',(array)[1]='2',(array)[2]='b',(array)[4]='\0'
+#define BCRYPT_SALT_SIZE 22
+/* Default number of rounds if not explicitly specified.  */
+#define B_ROUNDS_DEFAULT 13
+/* Minimum number of rounds.  */
+#define B_ROUNDS_MIN 4
+/* Maximum number of rounds.  */
+#define B_ROUNDS_MAX 31
+#endif /* USE_BCRYPT */
+
+#ifdef USE_SHA_CRYPT
+/* Fixed salt len for sha{256,512}crypt. */
+#define SHA_CRYPT_SALT_SIZE 16
+/* Default number of rounds if not explicitly specified.  */
+#define SHA_ROUNDS_DEFAULT 5000
+/* Minimum number of rounds.  */
+#define SHA_ROUNDS_MIN 1000
+/* Maximum number of rounds.  */
+#define SHA_ROUNDS_MAX 999999999
+#endif
+
+#ifdef USE_YESCRYPT
+/*
+ * Default number of base64 characters used for the salt.
+ * 24 characters gives a 144 bits (18 bytes) salt. Unlike the more
+ * traditional 128 bits (16 bytes) salt, this 144 bits salt is always
+ * represented by the same number of base64 characters without padding
+ * issue, even with a non-standard base64 encoding scheme.
+ */
+#define YESCRYPT_SALT_SIZE 24
+/* Default cost if not explicitly specified.  */
+#define Y_COST_DEFAULT 5
+/* Minimum cost.  */
+#define Y_COST_MIN 1
+/* Maximum cost.  */
+#define Y_COST_MAX 11
+#endif
+
+/* Fixed salt len for md5crypt. */
+#define MD5_CRYPT_SALT_SIZE 8
+
+/* Generate salt of size salt_size. */
+#define MAX_SALT_SIZE 44
+#define MIN_SALT_SIZE 8
+
+/* Maximum size of the generated salt string. */
+#define GENSALT_SETTING_SIZE 100
+
+/* local function prototypes */
+#if !USE_XCRYPT_GENSALT
+static /*@observer@*/const char *gensalt (size_t salt_size);
+#endif /* !USE_XCRYPT_GENSALT */
+#ifdef USE_SHA_CRYPT
+static /*@observer@*/unsigned long SHA_get_salt_rounds (/*@null@*/const int *prefered_rounds);
+static /*@observer@*/void SHA_salt_rounds_to_buf (char *buf, unsigned long rounds);
+#endif /* USE_SHA_CRYPT */
+#ifdef USE_BCRYPT
+static /*@observer@*/unsigned long BCRYPT_get_salt_rounds (/*@null@*/const int *prefered_rounds);
+static /*@observer@*/void BCRYPT_salt_rounds_to_buf (char *buf, unsigned long rounds);
+#endif /* USE_BCRYPT */
+#ifdef USE_YESCRYPT
+static /*@observer@*/unsigned long YESCRYPT_get_salt_cost (/*@null@*/const int *prefered_cost);
+static /*@observer@*/void YESCRYPT_salt_cost_to_buf (char *buf, unsigned long cost);
+#endif /* USE_YESCRYPT */
+
+
+#ifdef USE_SHA_CRYPT
+/* Return the the rounds number for the SHA crypt methods. */
+static /*@observer@*/unsigned long SHA_get_salt_rounds (/*@null@*/const int *prefered_rounds)
+{
+	unsigned long rounds;
+
+	if (NULL == prefered_rounds) {
+		long min_rounds = getdef_long ("SHA_CRYPT_MIN_ROUNDS", -1);
+		long max_rounds = getdef_long ("SHA_CRYPT_MAX_ROUNDS", -1);
+
+		if ((-1 == min_rounds) && (-1 == max_rounds)) {
+			rounds = SHA_ROUNDS_DEFAULT;
+		}
+		else {
+			if (-1 == min_rounds) {
+				min_rounds = max_rounds;
+			}
+
+			if (-1 == max_rounds) {
+				max_rounds = min_rounds;
+			}
+
+			if (min_rounds > max_rounds) {
+				max_rounds = min_rounds;
+			}
+
+			rounds = csrand_interval (min_rounds, max_rounds);
+		}
+	} else if (0 == *prefered_rounds) {
+		rounds = SHA_ROUNDS_DEFAULT;
+	} else {
+		rounds = (unsigned long) *prefered_rounds;
+	}
+
+	/* Sanity checks. The libc should also check this, but this
+	 * protects against a rounds_prefix overflow. */
+	if (rounds < SHA_ROUNDS_MIN) {
+		rounds = SHA_ROUNDS_MIN;
+	}
+
+	if (rounds > SHA_ROUNDS_MAX) {
+		rounds = SHA_ROUNDS_MAX;
+	}
+
+	return rounds;
+}
+
+/*
+ * Fill a salt prefix specifying the rounds number for the SHA crypt methods
+ * to a buffer.
+ */
+static /*@observer@*/void SHA_salt_rounds_to_buf (char *buf, unsigned long rounds)
+{
+	const size_t buf_begin = strlen (buf);
+
+	/* Nothing to do here if SHA_ROUNDS_DEFAULT is used. */
+	if (rounds == SHA_ROUNDS_DEFAULT) {
+		return;
+	}
+
+	/*
+	 * Check if the result buffer is long enough.
+	 * We are going to write a maximum of 17 bytes,
+	 * plus one byte for the terminator.
+	 *    rounds=XXXXXXXXX$
+	 *    00000000011111111
+	 *    12345678901234567
+	 */
+	assert (GENSALT_SETTING_SIZE > buf_begin + 17);
+
+	(void) snprintf (buf + buf_begin, 18, "rounds=%lu$", rounds);
+}
+#endif /* USE_SHA_CRYPT */
+
+#ifdef USE_BCRYPT
+/* Return the the rounds number for the BCRYPT method. */
+static /*@observer@*/unsigned long BCRYPT_get_salt_rounds (/*@null@*/const int *prefered_rounds)
+{
+	unsigned long rounds;
+
+	if (NULL == prefered_rounds) {
+		long min_rounds = getdef_long ("BCRYPT_MIN_ROUNDS", -1);
+		long max_rounds = getdef_long ("BCRYPT_MAX_ROUNDS", -1);
+
+		if ((-1 == min_rounds) && (-1 == max_rounds)) {
+			rounds = B_ROUNDS_DEFAULT;
+		} else {
+			if (-1 == min_rounds) {
+				min_rounds = max_rounds;
+			}
+
+			if (-1 == max_rounds) {
+				max_rounds = min_rounds;
+			}
+
+			if (min_rounds > max_rounds) {
+				max_rounds = min_rounds;
+			}
+
+			rounds = csrand_interval (min_rounds, max_rounds);
+		}
+	} else if (0 == *prefered_rounds) {
+		rounds = B_ROUNDS_DEFAULT;
+	} else {
+		rounds = (unsigned long) *prefered_rounds;
+	}
+
+	/* Sanity checks. */
+	if (rounds < B_ROUNDS_MIN) {
+		rounds = B_ROUNDS_MIN;
+	}
+
+#if USE_XCRYPT_GENSALT
+	if (rounds > B_ROUNDS_MAX) {
+		rounds = B_ROUNDS_MAX;
+	}
+#else /* USE_XCRYPT_GENSALT */
+	/*
+	 * Use 19 as an upper bound for now,
+	 * because musl doesn't allow rounds >= 20.
+	 * If musl ever supports > 20 rounds,
+	 * rounds should be set to B_ROUNDS_MAX.
+	 */
+	if (rounds > 19) {
+		rounds = 19;
+	}
+#endif /* USE_XCRYPT_GENSALT */
+
+	return rounds;
+}
+
+/*
+ * Fill a salt prefix specifying the rounds number for the BCRYPT method
+ * to a buffer.
+ */
+static /*@observer@*/void BCRYPT_salt_rounds_to_buf (char *buf, unsigned long rounds)
+{
+	const size_t buf_begin = strlen (buf);
+
+	/*
+	 * Check if the result buffer is long enough.
+	 * We are going to write three bytes,
+	 * plus one byte for the terminator.
+	 *    XX$
+	 *    000
+	 *    123
+	 */
+	assert (GENSALT_SETTING_SIZE > buf_begin + 3);
+
+	(void) snprintf (buf + buf_begin, 4, "%2.2lu$", rounds);
+}
+#endif /* USE_BCRYPT */
+
+#ifdef USE_YESCRYPT
+/* Return the the cost number for the YESCRYPT method. */
+static /*@observer@*/unsigned long YESCRYPT_get_salt_cost (/*@null@*/const int *prefered_cost)
+{
+	unsigned long cost;
+
+	if (NULL == prefered_cost) {
+		cost = getdef_num ("YESCRYPT_COST_FACTOR", Y_COST_DEFAULT);
+	} else if (0 == *prefered_cost) {
+		cost = Y_COST_DEFAULT;
+	} else {
+		cost = (unsigned long) *prefered_cost;
+	}
+
+	/* Sanity checks. */
+	if (cost < Y_COST_MIN) {
+		cost = Y_COST_MIN;
+	}
+
+	if (cost > Y_COST_MAX) {
+		cost = Y_COST_MAX;
+	}
+
+	return cost;
+}
+
+/*
+ * Fill a salt prefix specifying the cost for the YESCRYPT method
+ * to a buffer.
+ */
+static /*@observer@*/void YESCRYPT_salt_cost_to_buf (char *buf, unsigned long cost)
+{
+	const size_t buf_begin = strlen (buf);
+
+	/*
+	 * Check if the result buffer is long enough.
+	 * We are going to write four bytes,
+	 * plus one byte for the terminator.
+	 *    jXX$
+	 *    0000
+	 *    1234
+	 */
+	assert (GENSALT_SETTING_SIZE > buf_begin + 4);
+
+	buf[buf_begin + 0] = 'j';
+	if (cost < 3) {
+		buf[buf_begin + 1] = 0x36 + cost;
+	} else if (cost < 6) {
+		buf[buf_begin + 1] = 0x34 + cost;
+	} else {
+		buf[buf_begin + 1] = 0x3b + cost;
+	}
+	buf[buf_begin + 2] = cost >= 3 ? 'T' : '5';
+	buf[buf_begin + 3] = '$';
+	buf[buf_begin + 4] = '\0';
+}
+#endif /* USE_YESCRYPT */
+
+#if !USE_XCRYPT_GENSALT
+static /*@observer@*/const char *gensalt (size_t salt_size)
+{
+	static char salt[MAX_SALT_SIZE + 6];
+
+	bzero(salt, MAX_SALT_SIZE + 6);
+
+	assert (salt_size >= MIN_SALT_SIZE &&
+	        salt_size <= MAX_SALT_SIZE);
+	strcat (salt, l64a (csrand ()));
+	do {
+		strcat (salt, l64a (csrand ()));
+	} while (strlen (salt) < salt_size);
+
+	salt[salt_size] = '\0';
+
+	return salt;
+}
+#endif /* !USE_XCRYPT_GENSALT */
+
+/*
+ * Generate 8 base64 ASCII characters of random salt.  If MD5_CRYPT_ENAB
+ * in /etc/login.defs is "yes", the salt string will be prefixed by "$1$"
+ * (magic) and pw_encrypt() will execute the MD5-based FreeBSD-compatible
+ * version of crypt() instead of the standard one.
+ * Other methods can be set with ENCRYPT_METHOD
+ *
+ * The method can be forced with the meth parameter.
+ * If NULL, the method will be defined according to the ENCRYPT_METHOD
+ * variable, and if not set according to the MD5_CRYPT_ENAB variable,
+ * which can both be set inside the login.defs file.
+ *
+ * If meth is specified, an additional parameter can be provided.
+ *  * For the SHA256 and SHA512 method, this specifies the number of rounds
+ *    (if not NULL).
+ *  * For the YESCRYPT method, this specifies the cost factor (if not NULL).
+ */
+/*@observer@*/const char *crypt_make_salt (/*@null@*//*@observer@*/const char *meth, /*@null@*/void *arg)
+{
+	static char result[GENSALT_SETTING_SIZE];
+	size_t salt_len = MAX_SALT_SIZE;
+	const char *method;
+	unsigned long rounds = 0;
+
+	bzero(result, GENSALT_SETTING_SIZE);
+
+	if (NULL != meth)
+		method = meth;
+	else {
+		method = getdef_str ("ENCRYPT_METHOD");
+		if (NULL == method) {
+			method = getdef_bool ("MD5_CRYPT_ENAB") ? "MD5" : "DES";
+		}
+	}
+
+	if (0 == strcmp (method, "MD5")) {
+		MAGNUM(result, '1');
+		salt_len = MD5_CRYPT_SALT_SIZE;
+		rounds = 0;
+#ifdef USE_BCRYPT
+	} else if (0 == strcmp (method, "BCRYPT")) {
+		BCRYPTMAGNUM(result);
+		salt_len = BCRYPT_SALT_SIZE;
+		rounds = BCRYPT_get_salt_rounds (arg);
+		BCRYPT_salt_rounds_to_buf (result, rounds);
+#endif /* USE_BCRYPT */
+#ifdef USE_YESCRYPT
+	} else if (0 == strcmp (method, "YESCRYPT")) {
+		MAGNUM(result, 'y');
+		salt_len = YESCRYPT_SALT_SIZE;
+		rounds = YESCRYPT_get_salt_cost (arg);
+		YESCRYPT_salt_cost_to_buf (result, rounds);
+#endif /* USE_YESCRYPT */
+#ifdef USE_SHA_CRYPT
+	} else if (0 == strcmp (method, "SHA256")) {
+		MAGNUM(result, '5');
+		salt_len = SHA_CRYPT_SALT_SIZE;
+		rounds = SHA_get_salt_rounds (arg);
+		SHA_salt_rounds_to_buf (result, rounds);
+	} else if (0 == strcmp (method, "SHA512")) {
+		MAGNUM(result, '6');
+		salt_len = SHA_CRYPT_SALT_SIZE;
+		rounds = SHA_get_salt_rounds (arg);
+		SHA_salt_rounds_to_buf (result, rounds);
+#endif /* USE_SHA_CRYPT */
+	} else if (0 != strcmp (method, "DES")) {
+		fprintf (log_get_logfd(),
+			 _("Invalid ENCRYPT_METHOD value: '%s'.\n"
+			   "Defaulting to DES.\n"),
+			 method);
+		salt_len = MAX_SALT_SIZE;
+		rounds = 0;
+		bzero(result, GENSALT_SETTING_SIZE);
+	}
+
+#if USE_XCRYPT_GENSALT
+	/*
+	 * Prepare DES setting for crypt_gensalt(), if result
+	 * has not been filled with anything previously.
+	 */
+	if ('\0' == result[0]) {
+		/* Avoid -Wunused-but-set-variable. */
+		salt_len = GENSALT_SETTING_SIZE - 1;
+		rounds = 0;
+		memset(result, '.', salt_len);
+		result[salt_len] = '\0';
+	}
+
+	char *retval = crypt_gensalt (result, rounds, NULL, 0);
+
+	/* Should not happen, but... */
+	if (NULL == retval) {
+		fprintf (log_get_logfd(),
+			 _("Unable to generate a salt from setting "
+			   "\"%s\", check your settings in "
+			   "ENCRYPT_METHOD and the corresponding "
+			   "configuration for your selected hash "
+			   "method.\n"), result);
+
+		exit (1);
+	}
+
+	return retval;
+#else /* USE_XCRYPT_GENSALT */
+	/* Check if the result buffer is long enough. */
+	assert (GENSALT_SETTING_SIZE > strlen (result) + salt_len);
+
+	/* Concatenate a pseudo random salt. */
+	strncat (result, gensalt (salt_len),
+		 GENSALT_SETTING_SIZE - strlen (result) - 1);
+
+	return result;
+#endif /* USE_XCRYPT_GENSALT */
+}
diff --git a/lib/selinux.c b/lib/selinux.c
index ad639bd..6eb2894 100644
--- a/lib/selinux.c
+++ b/lib/selinux.c
@@ -188,7 +188,7 @@ int check_selinux_permit (const char *perm_name)
 		return 0;
 	}
 
-	selinux_set_callback (SELINUX_CB_LOG, (union selinux_callback) selinux_log_cb);
+	selinux_set_callback (SELINUX_CB_LOG, (union selinux_callback) { .func_log = selinux_log_cb });
 
 	if (getprevcon_raw (&user_context_raw) != 0) {
 		fprintf (shadow_logfd,
@@ -206,5 +206,5 @@ int check_selinux_permit (const char *perm_name)
 }
 
 #else				/* !WITH_SELINUX */
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/* !WITH_SELINUX */
diff --git a/lib/semanage.c b/lib/semanage.c
index 082a6e8..277e20e 100644
--- a/lib/semanage.c
+++ b/lib/semanage.c
@@ -16,19 +16,19 @@
 #endif
 #include <stdio.h>
 #include <stdarg.h>
+
 #include <selinux/selinux.h>
+
 #include <semanage/semanage.h>
+
+#include "attr.h"
 #include "prototypes.h"
 
 #include "shadowlog_internal.h"
 
-#ifndef DEFAULT_SERANGE
-#define DEFAULT_SERANGE "s0"
-#endif
-
 
 format_attr(printf, 3, 4)
-static void semanage_error_callback (unused void *varg,
+static void semanage_error_callback (MAYBE_UNUSED void *varg,
                                      semanage_handle_t *handle,
                                      const char *fmt, ...)
 {
@@ -101,6 +101,8 @@ static semanage_handle_t *semanage_init (void)
 	return handle;
 
 fail:
+	if (handle)
+		semanage_disconnect (handle);
 	semanage_handle_destroy (handle);
 	return NULL;
 }
@@ -109,7 +111,8 @@ fail:
 static int semanage_user_mod (semanage_handle_t *handle,
                               semanage_seuser_key_t *key,
                               const char *login_name,
-                              const char *seuser_name)
+                              const char *seuser_name,
+                              const char *serange)
 {
 	int ret;
 	semanage_seuser_t *seuser = NULL;
@@ -122,11 +125,12 @@ static int semanage_user_mod (semanage_handle_t *handle,
 		goto done;
 	}
 
-	if (semanage_mls_enabled(handle)) {
-		ret = semanage_seuser_set_mlsrange (handle, seuser, DEFAULT_SERANGE);
+	if (serange && semanage_mls_enabled(handle)) {
+		ret = semanage_seuser_set_mlsrange (handle, seuser, serange);
 		if (ret != 0) {
 			fprintf (shadow_logfd,
-			         _("Could not set serange for %s\n"), login_name);
+			         _("Could not set serange for %s to %s\n"),
+			         login_name, serange);
 			ret = 1;
 			goto done;
 		}
@@ -158,9 +162,10 @@ done:
 
 
 static int semanage_user_add (semanage_handle_t *handle,
-                             semanage_seuser_key_t *key,
+                             const semanage_seuser_key_t *key,
                              const char *login_name,
-                             const char *seuser_name)
+                             const char *seuser_name,
+                             const char *serange)
 {
 	int ret;
 	semanage_seuser_t *seuser = NULL;
@@ -181,11 +186,12 @@ static int semanage_user_add (semanage_handle_t *handle,
 		goto done;
 	}
 
-	if (semanage_mls_enabled(handle)) {
-		ret = semanage_seuser_set_mlsrange (handle, seuser, DEFAULT_SERANGE);
+	if (serange && semanage_mls_enabled(handle)) {
+		ret = semanage_seuser_set_mlsrange (handle, seuser, serange);
 		if (ret != 0) {
 			fprintf (shadow_logfd,
-			         _("Could not set serange for %s\n"), login_name);
+			         _("Could not set serange for %s to %s\n"),
+			         login_name, serange);
 			ret = 1;
 			goto done;
 		}
@@ -216,7 +222,7 @@ done:
 }
 
 
-int set_seuser (const char *login_name, const char *seuser_name)
+int set_seuser (const char *login_name, const char *seuser_name, const char *serange)
 {
 	semanage_handle_t *handle = NULL;
 	semanage_seuser_key_t *key = NULL;
@@ -250,7 +256,7 @@ int set_seuser (const char *login_name, const char *seuser_name)
 	}
 
 	if (0 != seuser_exists) {
-		ret = semanage_user_mod (handle, key, login_name, seuser_name);
+		ret = semanage_user_mod (handle, key, login_name, seuser_name, serange);
 		if (ret != 0) {
 			fprintf (shadow_logfd,
 			         _("Cannot modify SELinux user mapping\n"));
@@ -258,7 +264,7 @@ int set_seuser (const char *login_name, const char *seuser_name)
 			goto done;
 		}
 	} else {
-		ret = semanage_user_add (handle, key, login_name, seuser_name);
+		ret = semanage_user_add (handle, key, login_name, seuser_name, serange);
 		if (ret != 0) {
 			fprintf (shadow_logfd,
 			         _("Cannot add SELinux user mapping\n"));
@@ -279,6 +285,8 @@ int set_seuser (const char *login_name, const char *seuser_name)
 
 done:
 	semanage_seuser_key_free (key);
+	if (handle)
+		semanage_disconnect (handle);
 	semanage_handle_destroy (handle);
 	return ret;
 }
@@ -353,9 +361,12 @@ int del_seuser (const char *login_name)
 
 	ret = 0;
 done:
+	semanage_seuser_key_free (key);
+	if (handle)
+		semanage_disconnect (handle);
 	semanage_handle_destroy (handle);
 	return ret;
 }
 #else				/* !WITH_SELINUX */
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/* !WITH_SELINUX */
diff --git a/lib/setugid.c b/lib/setugid.c
new file mode 100644
index 0000000..6dbe38e
--- /dev/null
+++ b/lib/setugid.c
@@ -0,0 +1,125 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Separated from setup.c.  --marekm
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <grp.h>
+#include <errno.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+#include "getdef.h"
+
+/*
+ * setup_groups - set the group credentials
+ *	set the group ID to the value from the password file entry
+ *	set the supplementary group IDs
+ *
+ * In case of PAM enabled configurations, this shall be called before
+ * pam_setcred.
+ *
+ * Returns 0 on success, or -1 on failure.
+ */
+int setup_groups (const struct passwd *info)
+{
+	/*
+	 * Set the real group ID to the primary group ID in the password
+	 * file.
+	 */
+	if (setgid (info->pw_gid) == -1) {
+		int err = errno;
+		perror ("setgid");
+		SYSLOG ((LOG_ERR, "bad group ID `%d' for user `%s': %s\n",
+		         info->pw_gid, info->pw_name, strerror (err)));
+		closelog ();
+		return -1;
+	}
+#ifdef HAVE_INITGROUPS
+	/*
+	 * For systems which support multiple concurrent groups, go get
+	 * the group set from the /etc/group file.
+	 */
+	if (initgroups (info->pw_name, info->pw_gid) == -1) {
+		int err = errno;
+		perror ("initgroups");
+		SYSLOG ((LOG_ERR, "initgroups failed for user `%s': %s\n",
+		         info->pw_name, strerror (err)));
+		closelog ();
+		return -1;
+	}
+#endif
+	return 0;
+}
+
+/*
+ * change_uid - Set the real UID
+ *
+ * Returns 0 on success, or -1 on failure.
+ */
+int change_uid (const struct passwd *info)
+{
+	/*
+	 * Set the real UID to the UID value in the password file.
+	 */
+	if (setuid (info->pw_uid) != 0) {
+		int err = errno;
+		perror ("setuid");
+		SYSLOG ((LOG_ERR, "bad user ID `%d' for user `%s': %s\n",
+		         (int) info->pw_uid, info->pw_name, strerror (err)));
+		closelog ();
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ *	setup_uid_gid() performs the following steps -
+ *
+ *	set the group ID to the value from the password file entry
+ *	set the supplementary group IDs
+ *	optionally call specified function which may add more groups
+ *	set the user ID to the value from the password file entry
+ *
+ *	Returns 0 on success, or -1 on failure.
+ */
+
+#if defined (HAVE_INITGROUPS) && ! (defined USE_PAM)
+int setup_uid_gid (const struct passwd *info, bool is_console)
+#else
+int setup_uid_gid (const struct passwd *info)
+#endif
+{
+	if (setup_groups (info) < 0) {
+		return -1;
+	}
+
+#if defined (HAVE_INITGROUPS) && ! defined (USE_PAM)
+	if (is_console) {
+		const char *cp = getdef_str ("CONSOLE_GROUPS");
+
+		if ((NULL != cp) && (add_groups (cp) != 0)) {
+			perror ("Warning: add_groups");
+		}
+	}
+#endif				/* HAVE_INITGROUPS && !USE_PAM*/
+
+	if (change_uid (info) < 0) {
+		return -1;
+	}
+
+	return 0;
+}
+
diff --git a/lib/setupenv.c b/lib/setupenv.c
new file mode 100644
index 0000000..c9b7f26
--- /dev/null
+++ b/lib/setupenv.c
@@ -0,0 +1,285 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * Separated from setup.c.  --marekm
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <ctype.h>
+
+#include "alloc.h"
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+#include "getdef.h"
+#include "shadowlog.h"
+#include "string/sprintf.h"
+
+
+#ifndef USE_PAM
+static void
+addenv_path(const char *varname, const char *dirname, const char *filename)
+{
+	char  *buf;
+
+	xasprintf(&buf, "%s/%s", dirname, filename);
+	addenv(varname, buf);
+	free(buf);
+}
+
+static void read_env_file (const char *filename)
+{
+	FILE *fp;
+	char buf[1024];
+	char *cp, *name, *val;
+
+	fp = fopen (filename, "r");
+	if (NULL == fp) {
+		return;
+	}
+	while (fgets (buf, (int)(sizeof buf), fp) == buf) {
+		cp = strrchr (buf, '\n');
+		if (NULL == cp) {
+			break;
+		}
+		*cp = '\0';
+
+		cp = buf;
+		/* ignore whitespace and comments */
+		while (isspace (*cp)) {
+			cp++;
+		}
+		if (('\0' == *cp) || ('#' == *cp)) {
+			continue;
+		}
+		/*
+		 * ignore lines which don't follow the name=value format
+		 * (for example, the "export NAME" shell commands)
+		 */
+		name = cp;
+		while (('\0' != *cp) && !isspace (*cp) && ('=' != *cp)) {
+			cp++;
+		}
+		if ('=' != *cp) {
+			continue;
+		}
+		/* NUL-terminate the name */
+		*cp = '\0';
+		cp++;
+		val = cp;
+#if 0				/* XXX untested, and needs rewrite with fewer goto's :-) */
+/*
+ (state, char_type) -> (state, action)
+
+ state: unquoted, single_quoted, double_quoted, escaped, double_quoted_escaped
+ char_type: normal, white, backslash, single, double
+ action: remove_curr, remove_curr_skip_next, remove_prev, finish XXX
+*/
+	      no_quote:
+		if (*cp == '\\') {
+			/* remove the backslash */
+			remove_char (cp);
+			/* skip over the next character */
+			if (*cp)
+				cp++;
+			goto no_quote;
+		} else if (*cp == '\'') {
+			/* remove the quote */
+			remove_char (cp);
+			/* now within single quotes */
+			goto s_quote;
+		} else if (*cp == '"') {
+			/* remove the quote */
+			remove_char (cp);
+			/* now within double quotes */
+			goto d_quote;
+		} else if (*cp == '\0') {
+			/* end of string */
+			goto finished;
+		} else if (isspace (*cp)) {
+			/* unescaped whitespace - end of string */
+			*cp = '\0';
+			goto finished;
+		} else {
+			cp++;
+			goto no_quote;
+		}
+	      s_quote:
+		if (*cp == '\'') {
+			/* remove the quote */
+			remove_char (cp);
+			/* unquoted again */
+			goto no_quote;
+		} else if (*cp == '\0') {
+			/* end of string */
+			goto finished;
+		} else {
+			/* preserve everything within single quotes */
+			cp++;
+			goto s_quote;
+		}
+	      d_quote:
+		if (*cp == '\"') {
+			/* remove the quote */
+			remove_char (cp);
+			/* unquoted again */
+			goto no_quote;
+		} else if (*cp == '\\') {
+			cp++;
+			/* if backslash followed by double quote, remove backslash
+			   else skip over the backslash and following char */
+			if (*cp == '"')
+				remove_char (cp - 1);
+			else if (*cp)
+				cp++;
+			goto d_quote;
+		}
+		else if (*cp == '\0') {
+			/* end of string */
+			goto finished;
+		} else {
+			/* preserve everything within double quotes */
+			goto d_quote;
+		}
+	      finished:
+#endif				/* 0 */
+		/*
+		 * XXX - should handle quotes, backslash escapes, etc.
+		 * like the shell does.
+		 */
+		addenv (name, val);
+	}
+	(void) fclose (fp);
+}
+#endif				/* USE_PAM */
+
+
+/*
+ *	change to the user's home directory
+ *	set the HOME, SHELL, MAIL, PATH, and LOGNAME or USER environmental
+ *	variables.
+ */
+
+void setup_env (struct passwd *info)
+{
+#ifndef USE_PAM
+	const char *envf;
+#endif
+	const char *cp;
+
+	/*
+	 * Change the current working directory to be the home directory
+	 * of the user.  It is a fatal error for this process to be unable
+	 * to change to that directory.  There is no "default" home
+	 * directory.
+	 *
+	 * We no longer do it as root - should work better on NFS-mounted
+	 * home directories.  Some systems default to HOME=/, so we make
+	 * this a configurable option.  --marekm
+	 */
+
+	if (chdir (info->pw_dir) == -1) {
+		if (!getdef_bool ("DEFAULT_HOME") || chdir ("/") == -1) {
+			fprintf (log_get_logfd(), _("Unable to cd to '%s'\n"),
+				 info->pw_dir);
+			SYSLOG ((LOG_WARN,
+				 "unable to cd to `%s' for user `%s'\n",
+				 info->pw_dir, info->pw_name));
+			closelog ();
+			exit (EXIT_FAILURE);
+		}
+		(void) puts (_("No directory, logging in with HOME=/"));
+		free (info->pw_dir);
+		info->pw_dir = xstrdup ("/");
+	}
+
+	/*
+	 * Create the HOME environmental variable and export it.
+	 */
+
+	addenv ("HOME", info->pw_dir);
+
+	/*
+	 * Create the SHELL environmental variable and export it.
+	 */
+
+	if ((NULL == info->pw_shell) || ('\0' == *info->pw_shell)) {
+		free (info->pw_shell);
+		info->pw_shell = xstrdup (SHELL);
+	}
+
+	addenv ("SHELL", info->pw_shell);
+
+	/*
+	 * Export the user name.  For BSD derived systems, it's "USER", for
+	 * all others it's "LOGNAME".  We set both of them.
+	 */
+
+	addenv ("USER", info->pw_name);
+	addenv ("LOGNAME", info->pw_name);
+
+	/*
+	 * Create the PATH environmental variable and export it.
+	 */
+
+	cp = getdef_str ((info->pw_uid == 0) ? "ENV_SUPATH" : "ENV_PATH");
+
+	if (NULL == cp) {
+		/* not specified, use a minimal default */
+		addenv ((info->pw_uid == 0) ? "PATH=/sbin:/bin:/usr/sbin:/usr/bin" : "PATH=/bin:/usr/bin", NULL);
+	} else if (strchr (cp, '=')) {
+		/* specified as name=value (PATH=...) */
+		addenv (cp, NULL);
+	} else {
+		/* only value specified without "PATH=" */
+		addenv ("PATH", cp);
+	}
+
+#ifndef USE_PAM
+	/*
+	 * Create the MAIL environmental variable and export it.  login.defs
+	 * knows the prefix.
+	 */
+
+	if (getdef_bool ("MAIL_CHECK_ENAB")) {
+		cp = getdef_str ("MAIL_DIR");
+		if (NULL != cp) {
+			addenv_path ("MAIL", cp, info->pw_name);
+		} else {
+			cp = getdef_str ("MAIL_FILE");
+			if (NULL != cp) {
+				addenv_path ("MAIL", info->pw_dir, cp);
+			} else {
+#if defined(MAIL_SPOOL_FILE)
+				addenv_path ("MAIL", info->pw_dir, MAIL_SPOOL_FILE);
+#elif defined(MAIL_SPOOL_DIR)
+				addenv_path ("MAIL", MAIL_SPOOL_DIR, info->pw_name);
+#endif
+			}
+		}
+	}
+
+	/*
+	 * Read environment from optional config file.  --marekm
+	 */
+	envf = getdef_str ("ENVIRON_FILE");
+	if (NULL != envf) {
+		read_env_file (envf);
+	}
+#endif				/* !USE_PAM */
+}
+
diff --git a/lib/sgetgrent.c b/lib/sgetgrent.c
index ad4fcc8..6cde15c 100644
--- a/lib/sgetgrent.c
+++ b/lib/sgetgrent.c
@@ -14,6 +14,9 @@
 #include <stdio.h>
 #include <sys/types.h>
 #include <grp.h>
+#include <string.h>
+
+#include "alloc.h"
 #include "defines.h"
 #include "prototypes.h"
 
@@ -25,19 +28,15 @@
  *	list() converts the comma-separated list of member names into
  *	an array of character pointers.
  *
- *	WARNING: I profiled this once with and without strchr() calls
- *	and found that using a register variable and an explicit loop
- *	works best.  For large /etc/group files, this is a major win.
- *
  * FINALLY added dynamic allocation.  Still need to fix sgetsgent().
  *  --marekm
  */
-static char **list (char *s)
+static char **
+list(char *s)
 {
-	static char **members = 0;
-	static int size = 0;	/* max members + 1 */
-	int i;
-	char **rbuf;
+	static char **members = NULL;
+	static size_t size = 0;	/* max members + 1 */
+	size_t i;
 
 	i = 0;
 	for (;;) {
@@ -45,40 +44,24 @@ static char **list (char *s)
 		   member name, or terminating NULL).  */
 		if (i >= size) {
 			size = i + 100;	/* at least: i + 1 */
-			if (members) {
-				rbuf =
-				    realloc (members, size * sizeof (char *));
-			} else {
-				/* for old (before ANSI C) implementations of
-				   realloc() that don't handle NULL properly */
-				rbuf = malloc (size * sizeof (char *));
-			}
-			if (!rbuf) {
-				free (members);
-				members = 0;
+			members = REALLOCF(members, size, char *);
+			if (!members) {
 				size = 0;
-				return (char **) 0;
+				return NULL;
 			}
-			members = rbuf;
 		}
 		if (!s || s[0] == '\0')
 			break;
-		members[i++] = s;
-		while (('\0' != *s) && (',' != *s)) {
-			s++;
-		}
-		if ('\0' != *s) {
-			*s++ = '\0';
-		}
+		members[i++] = strsep(&s, ",");
 	}
-	members[i] = (char *) 0;
+	members[i] = NULL;
 	return members;
 }
 
 
 struct group *sgetgrent (const char *buf)
 {
-	static char *grpbuf = 0;
+	static char *grpbuf = NULL;
 	static size_t size = 0;
 	static char *grpfields[NFIELDS];
 	static struct group grent;
@@ -90,10 +73,10 @@ struct group *sgetgrent (const char *buf)
 		   allocate a larger block */
 		free (grpbuf);
 		size = strlen (buf) + 1000;	/* at least: strlen(buf) + 1 */
-		grpbuf = malloc (size);
-		if (!grpbuf) {
+		grpbuf = MALLOC(size, char);
+		if (grpbuf == NULL) {
 			size = 0;
-			return 0;
+			return NULL;
 		}
 	}
 	strcpy (grpbuf, buf);
@@ -103,25 +86,20 @@ struct group *sgetgrent (const char *buf)
 		*cp = '\0';
 	}
 
-	for (cp = grpbuf, i = 0; (i < NFIELDS) && (NULL != cp); i++) {
-		grpfields[i] = cp;
-		cp = strchr (cp, ':');
-		if (NULL != cp) {
-			*cp = '\0';
-			cp++;
-		}
-	}
+	for (cp = grpbuf, i = 0; (i < NFIELDS) && (NULL != cp); i++)
+		grpfields[i] = strsep(&cp, ":");
+
 	if (i < (NFIELDS - 1) || *grpfields[2] == '\0' || cp != NULL) {
-		return (struct group *) 0;
+		return NULL;
 	}
 	grent.gr_name = grpfields[0];
 	grent.gr_passwd = grpfields[1];
-	if (get_gid (grpfields[2], &grent.gr_gid) == 0) {
-		return (struct group *) 0;
+	if (get_gid(grpfields[2], &grent.gr_gid) == -1) {
+		return NULL;
 	}
 	grent.gr_mem = list (grpfields[3]);
 	if (NULL == grent.gr_mem) {
-		return (struct group *) 0;	/* out of memory */
+		return NULL;	/* out of memory */
 	}
 
 	return &grent;
diff --git a/lib/sgetpwent.c b/lib/sgetpwent.c
index 1c8c63e..75c9177 100644
--- a/lib/sgetpwent.c
+++ b/lib/sgetpwent.c
@@ -12,9 +12,11 @@
 #ident "$Id$"
 
 #include <sys/types.h>
-#include "defines.h"
 #include <stdio.h>
 #include <pwd.h>
+#include <string.h>
+
+#include "defines.h"
 #include "prototypes.h"
 #include "shadowlog_internal.h"
 
@@ -32,7 +34,8 @@
  *	performance reasons.  I am going to come up with some conditional
  *	compilation glarp to improve on this in the future.
  */
-struct passwd *sgetpwent (const char *buf)
+struct passwd *
+sgetpwent(const char *buf)
 {
 	static struct passwd pwent;
 	static char pwdbuf[PASSWD_ENTRY_MAX_LENGTH];
@@ -58,19 +61,8 @@ struct passwd *sgetpwent (const char *buf)
 	 * field.  The fields are converted into NUL terminated strings.
 	 */
 
-	for (cp = pwdbuf, i = 0; (i < NFIELDS) && (NULL != cp); i++) {
-		fields[i] = cp;
-		while (('\0' != *cp) && (':' != *cp)) {
-			cp++;
-		}
-
-		if ('\0' != *cp) {
-			*cp = '\0';
-			cp++;
-		} else {
-			cp = NULL;
-		}
-	}
+	for (cp = pwdbuf, i = 0; (i < NFIELDS) && (NULL != cp); i++)
+		fields[i] = strsep(&cp, ":");
 
 	/* something at the end, columns over shot */
 	if ( cp != NULL ) {
@@ -94,10 +86,10 @@ struct passwd *sgetpwent (const char *buf)
 
 	pwent.pw_name = fields[0];
 	pwent.pw_passwd = fields[1];
-	if (get_uid (fields[2], &pwent.pw_uid) == 0) {
+	if (get_uid(fields[2], &pwent.pw_uid) == -1) {
 		return NULL;
 	}
-	if (get_gid (fields[3], &pwent.pw_gid) == 0) {
+	if (get_gid(fields[3], &pwent.pw_gid) == -1) {
 		return NULL;
 	}
 	pwent.pw_gecos = fields[4];
diff --git a/lib/sgetspent.c b/lib/sgetspent.c
index f1d4b20..bd2ef8b 100644
--- a/lib/sgetspent.c
+++ b/lib/sgetspent.c
@@ -14,17 +14,26 @@
 
 #ident "$Id$"
 
+#include <stddef.h>
+#include <stdio.h>
 #include <sys/types.h>
+#include <string.h>
+
+#include "atoi/str2i.h"
 #include "prototypes.h"
 #include "shadowlog_internal.h"
 #include "defines.h"
-#include <stdio.h>
+
+
 #define	FIELDS	9
 #define	OFIELDS	5
+
+
 /*
  * sgetspent - convert string in shadow file format to (struct spwd *)
  */
-struct spwd *sgetspent (const char *string)
+struct spwd *
+sgetspent(const char *string)
 {
 	static char spwbuf[PASSWD_ENTRY_MAX_LENGTH];
 	static struct spwd spwd;
@@ -41,7 +50,7 @@ struct spwd *sgetspent (const char *string)
 		fprintf (shadow_logfd,
 		         "%s: Too long passwd entry encountered, file corruption?\n",
 		         shadow_progname);
-		return 0;	/* fail if too long */
+		return NULL;	/* fail if too long */
 	}
 	strcpy (spwbuf, string);
 
@@ -57,9 +66,7 @@ struct spwd *sgetspent (const char *string)
 
 	for (cp = spwbuf, i = 0; ('\0' != *cp) && (i < FIELDS); i++) {
 		fields[i] = cp;
-		while (('\0' != *cp) && (':' != *cp)) {
-			cp++;
-		}
+		cp = strchrnul(cp, ':');
 
 		if ('\0' != *cp) {
 			*cp = '\0';
@@ -67,13 +74,12 @@ struct spwd *sgetspent (const char *string)
 		}
 	}
 
-	if (i == (FIELDS - 1)) {
-		fields[i++] = cp;
-	}
+	if (i == (FIELDS - 1))
+		fields[i++] = "";
 
 	if ( ((NULL != cp) && ('\0' != *cp)) ||
 	     ((i != FIELDS) && (i != OFIELDS)) ) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -92,9 +98,9 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[2][0] == '\0') {
 		spwd.sp_lstchg = -1;
-	} else if (   (getlong (fields[2], &spwd.sp_lstchg) == 0)
+	} else if (   (str2sl(&spwd.sp_lstchg, fields[2]) == -1)
 	           || (spwd.sp_lstchg < 0)) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -103,9 +109,9 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[3][0] == '\0') {
 		spwd.sp_min = -1;
-	} else if (   (getlong (fields[3], &spwd.sp_min) == 0)
+	} else if (   (str2sl(&spwd.sp_min, fields[3]) == -1)
 	           || (spwd.sp_min < 0)) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -114,9 +120,9 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[4][0] == '\0') {
 		spwd.sp_max = -1;
-	} else if (   (getlong (fields[4], &spwd.sp_max) == 0)
+	} else if (   (str2sl(&spwd.sp_max, fields[4]) == -1)
 	           || (spwd.sp_max < 0)) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -139,9 +145,9 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[5][0] == '\0') {
 		spwd.sp_warn = -1;
-	} else if (   (getlong (fields[5], &spwd.sp_warn) == 0)
+	} else if (   (str2sl(&spwd.sp_warn, fields[5]) == -1)
 	           || (spwd.sp_warn < 0)) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -151,9 +157,9 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[6][0] == '\0') {
 		spwd.sp_inact = -1;
-	} else if (   (getlong (fields[6], &spwd.sp_inact) == 0)
+	} else if (   (str2sl(&spwd.sp_inact, fields[6]) == -1)
 	           || (spwd.sp_inact < 0)) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -163,9 +169,9 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[7][0] == '\0') {
 		spwd.sp_expire = -1;
-	} else if (   (getlong (fields[7], &spwd.sp_expire) == 0)
+	} else if (   (str2sl(&spwd.sp_expire, fields[7]) == -1)
 	           || (spwd.sp_expire < 0)) {
-		return 0;
+		return NULL;
 	}
 
 	/*
@@ -175,13 +181,12 @@ struct spwd *sgetspent (const char *string)
 
 	if (fields[8][0] == '\0') {
 		spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
-	} else if (getulong (fields[8], &spwd.sp_flag) == 0) {
-		return 0;
+	} else if (str2ul(&spwd.sp_flag, fields[8]) == -1) {
+		return NULL;
 	}
 
 	return (&spwd);
 }
 #else
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif
-
diff --git a/lib/sgroupio.c b/lib/sgroupio.c
index 871749b..0297df4 100644
--- a/lib/sgroupio.c
+++ b/lib/sgroupio.c
@@ -14,10 +14,12 @@
 
 #ident "$Id$"
 
+#include "alloc.h"
 #include "prototypes.h"
 #include "defines.h"
 #include "commonio.h"
 #include "getdef.h"
+#include "memzero.h"
 #include "sgroupio.h"
 
 /*@null@*/ /*@only@*/struct sgrp *__sgr_dup (const struct sgrp *sgent)
@@ -25,13 +27,12 @@
 	struct sgrp *sg;
 	int i;
 
-	sg = (struct sgrp *) malloc (sizeof *sg);
+	sg = CALLOC (1, struct sgrp);
 	if (NULL == sg) {
 		return NULL;
 	}
 	/* Do the same as the other _dup function, even if we know the
 	 * structure. */
-	memset (sg, 0, sizeof *sg);
 	/*@-mustfreeonly@*/
 	sg->sg_name = strdup (sgent->sg_name);
 	/*@=mustfreeonly@*/
@@ -50,7 +51,7 @@
 
 	for (i = 0; NULL != sgent->sg_adm[i]; i++);
 	/*@-mustfreeonly@*/
-	sg->sg_adm = (char **) malloc ((i + 1) * sizeof (char *));
+	sg->sg_adm = MALLOC(i + 1, char *);
 	/*@=mustfreeonly@*/
 	if (NULL == sg->sg_adm) {
 		free (sg->sg_passwd);
@@ -75,7 +76,7 @@
 
 	for (i = 0; NULL != sgent->sg_mem[i]; i++);
 	/*@-mustfreeonly@*/
-	sg->sg_mem = (char **) malloc ((i + 1) * sizeof (char *));
+	sg->sg_mem = MALLOC(i + 1, char *);
 	/*@=mustfreeonly@*/
 	if (NULL == sg->sg_mem) {
 		for (i = 0; NULL != sg->sg_adm[i]; i++) {
@@ -116,14 +117,16 @@ static /*@null@*/ /*@only@*/void *gshadow_dup (const void *ent)
 	return __sgr_dup (sg);
 }
 
-static void gshadow_free (/*@out@*/ /*@only@*/void *ent)
+static void
+gshadow_free(/*@only@*/void *ent)
 {
 	struct sgrp *sg = ent;
 
 	sgr_free (sg);
 }
 
-void sgr_free (/*@out@*/ /*@only@*/struct sgrp *sgent)
+void
+sgr_free(/*@only@*/struct sgrp *sgent)
 {
 	size_t i;
 	free (sgent->sg_name);
@@ -151,7 +154,7 @@ static const char *gshadow_getname (const void *ent)
 
 static void *gshadow_parse (const char *line)
 {
-	return (void *) sgetsgent (line);
+	return sgetsgent (line);
 }
 
 static int gshadow_put (const void *ent, FILE * file)
@@ -253,7 +256,7 @@ int sgr_open (int mode)
 
 int sgr_update (const struct sgrp *sg)
 {
-	return commonio_update (&gshadow_db, (const void *) sg);
+	return commonio_update (&gshadow_db, sg);
 }
 
 int sgr_remove (const char *name)
@@ -302,5 +305,5 @@ int sgr_sort ()
 	return commonio_sort_wrt (&gshadow_db, __gr_get_db ());
 }
 #else
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif
diff --git a/lib/shadow.c b/lib/shadow.c
index b628b65..f17d09e 100644
--- a/lib/shadow.c
+++ b/lib/shadow.c
@@ -18,54 +18,15 @@
 #include "prototypes.h"
 #include "defines.h"
 #include <stdio.h>
-#ifdef	USE_NIS
-static bool nis_used;
-static bool nis_ignore;
-static enum { native, start, middle, native2 } nis_state;
-static bool nis_bound;
-static char *nis_domain;
-static char *nis_key;
-static int nis_keylen;
-static char *nis_val;
-static int nis_vallen;
-
-#define	IS_NISCHAR(c) ((c)=='+')
-#endif
+
+#include "atoi/str2i.h"
+
 
 static FILE *shadow;
 
 #define	FIELDS	9
 #define	OFIELDS	5
 
-#ifdef	USE_NIS
-
-/*
- * __setspNIS - turn on or off NIS searches
- */
-
-void __setspNIS (bool flag)
-{
-	nis_ignore = !flag;
-
-	if (nis_ignore) {
-		nis_used = false;
-	}
-}
-
-/*
- * bind_nis - bind to NIS server
- */
-
-static int bind_nis (void)
-{
-	if (yp_get_default_domain (&nis_domain)) {
-		return -1;
-	}
-
-	nis_bound = true;
-	return 0;
-}
-#endif
 
 /*
  * setspent - initialize access to shadow text and DBM files
@@ -78,10 +39,6 @@ void setspent (void)
 	}else {
 		shadow = fopen (SHADOW_FILE, "r");
 	}
-
-#ifdef	USE_NIS
-	nis_state = native;
-#endif
 }
 
 /*
@@ -94,7 +51,7 @@ void endspent (void)
 		(void) fclose (shadow);
 	}
 
-	shadow = (FILE *) 0;
+	shadow = NULL;
 }
 
 /*
@@ -150,11 +107,6 @@ static struct spwd *my_sgetspent (const char *string)
 	 */
 
 	spwd.sp_namp = fields[0];
-#ifdef	USE_NIS
-	if (IS_NISCHAR (fields[0][0])) {
-		nis_used = true;
-	}
-#endif
 	spwd.sp_pwdp = fields[1];
 
 	/*
@@ -166,16 +118,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[2][0] == '\0') {
 		spwd.sp_lstchg = -1;
 	} else {
-		if (getlong (fields[2], &spwd.sp_lstchg) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_lstchg = -1;
-			} else
-#endif
-				return 0;
-		} else if (spwd.sp_lstchg < 0) {
+		if (str2sl(&spwd.sp_lstchg, fields[2]) == -1)
+			return 0;
+		if (spwd.sp_lstchg < 0)
 			return 0;
-		}
 	}
 
 	/*
@@ -185,18 +131,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[3][0] == '\0') {
 		spwd.sp_min = -1;
 	} else {
-		if (getlong (fields[3], &spwd.sp_min) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_min = -1;
-			} else
-#endif
-			{
-				return 0;
-			}
-		} else if (spwd.sp_min < 0) {
+		if (str2sl(&spwd.sp_min, fields[3]) == -1)
+			return 0;
+		if (spwd.sp_min < 0)
 			return 0;
-		}
 	}
 
 	/*
@@ -206,16 +144,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[4][0] == '\0') {
 		spwd.sp_max = -1;
 	} else {
-		if (getlong (fields[4], &spwd.sp_max) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_max = -1;
-			} else
-#endif
-				return 0;
-		} else if (spwd.sp_max < 0) {
+		if (str2sl(&spwd.sp_max, fields[4]) == -1)
+			return 0;
+		if (spwd.sp_max < 0)
 			return 0;
-		}
 	}
 
 	/*
@@ -239,18 +171,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[5][0] == '\0') {
 		spwd.sp_warn = -1;
 	} else {
-		if (getlong (fields[5], &spwd.sp_warn) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_warn = -1;
-			} else
-#endif
-			{
-				return 0;
-			}
-		} else if (spwd.sp_warn < 0) {
+		if (str2sl(&spwd.sp_warn, fields[5]) == -1)
+			return 0;
+		if (spwd.sp_warn < 0)
 			return 0;
-		}
 	}
 
 	/*
@@ -261,18 +185,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[6][0] == '\0') {
 		spwd.sp_inact = -1;
 	} else {
-		if (getlong (fields[6], &spwd.sp_inact) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_inact = -1;
-			} else
-#endif
-			{
-				return 0;
-			}
-		} else if (spwd.sp_inact < 0) {
+		if (str2sl(&spwd.sp_inact, fields[6]) == -1)
+			return 0;
+		if (spwd.sp_inact < 0)
 			return 0;
-		}
 	}
 
 	/*
@@ -283,18 +199,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[7][0] == '\0') {
 		spwd.sp_expire = -1;
 	} else {
-		if (getlong (fields[7], &spwd.sp_expire) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_expire = -1;
-			} else
-#endif
-			{
-				return 0;
-			}
-		} else if (spwd.sp_expire < 0) {
+		if (str2sl(&spwd.sp_expire, fields[7]) == -1)
+			return 0;
+		if (spwd.sp_expire < 0)
 			return 0;
-		}
 	}
 
 	/*
@@ -305,18 +213,10 @@ static struct spwd *my_sgetspent (const char *string)
 	if (fields[8][0] == '\0') {
 		spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
 	} else {
-		if (getulong (fields[8], &spwd.sp_flag) == 0) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
-			} else
-#endif
-			{
-				return 0;
-			}
-		} else if (spwd.sp_flag < 0) {
+		if (str2ul(&spwd.sp_flag, fields[8]) == -1)
+			return 0;
+		if (spwd.sp_flag < 0)
 			return 0;
-		}
 	}
 
 	return (&spwd);
@@ -335,21 +235,12 @@ struct spwd *fgetspent (FILE * fp)
 		return (0);
 	}
 
-#ifdef	USE_NIS
-	while (fgets (buf, (int) sizeof buf, fp) != (char *) 0)
-#else
-	if (fgets (buf, (int) sizeof buf, fp) != (char *) 0)
-#endif
+	if (fgets (buf, sizeof buf, fp) != NULL)
 	{
 		cp = strchr (buf, '\n');
 		if (NULL != cp) {
 			*cp = '\0';
 		}
-#ifdef	USE_NIS
-		if (nis_ignore && IS_NISCHAR (buf[0])) {
-			continue;
-		}
-#endif
 		return my_sgetspent (buf);
 	}
 	return 0;
@@ -361,92 +252,10 @@ struct spwd *fgetspent (FILE * fp)
 
 struct spwd *getspent (void)
 {
-#ifdef	USE_NIS
-	int nis_1_user = 0;
-	struct spwd *val;
-#endif
 	if (NULL == shadow) {
 		setspent ();
 	}
-
-#ifdef	USE_NIS
-      again:
-	/*
-	 * See if we are reading from the local file.
-	 */
-
-	if (nis_state == native || nis_state == native2) {
-
-		/*
-		 * Get the next entry from the shadow file.  Return NULL
-		 * right away if there is none.
-		 */
-
-		val = fgetspent (shadow);
-		if (NULL == val)
-			return 0;
-
-		/*
-		 * If this entry began with a NIS escape character, we have
-		 * to see if this is just a single user, or if the entire
-		 * map is being asked for.
-		 */
-
-		if (IS_NISCHAR (val->sp_namp[0])) {
-			if (val->sp_namp[1])
-				nis_1_user = 1;
-			else
-				nis_state = start;
-		}
-
-		/*
-		 * If this isn't a NIS user and this isn't an escape to go
-		 * use a NIS map, it must be a regular local user.
-		 */
-
-		if (nis_1_user == 0 && nis_state != start)
-			return val;
-
-		/*
-		 * If this is an escape to use an NIS map, switch over to
-		 * that bunch of code.
-		 */
-
-		if (nis_state == start)
-			goto again;
-
-		/*
-		 * NEEDSWORK.  Here we substitute pieces-parts of this entry.
-		 */
-
-		return 0;
-	} else {
-		if (!nis_bound) {
-			if (bind_nis ()) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		if (nis_state == start) {
-			if (yp_first (nis_domain, "shadow.bynam", &nis_key,
-			              &nis_keylen, &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-			nis_state = middle;
-		} else if (nis_state == middle) {
-			if (yp_next (nis_domain, "shadow.bynam", nis_key,
-			             nis_keylen, &nis_key, &nis_keylen,
-			             &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		return my_sgetspent (nis_val);
-	}
-#else
 	return (fgetspent (shadow));
-#endif
 }
 
 /*
@@ -457,74 +266,16 @@ struct spwd *getspnam (const char *name)
 {
 	struct spwd *sp;
 
-#ifdef	USE_NIS
-	static char save_name[16];
-	bool nis_disabled = false;
-#endif
-
 	setspent ();
 
-#ifdef	USE_NIS
-	/*
-	 * Search the shadow.byname map for this user.
-	 */
-
-	if (!nis_ignore && !nis_bound) {
-		bind_nis ();
-	}
-
-	if (!nis_ignore && nis_bound) {
-		char *cp;
-
-		if (yp_match (nis_domain, "shadow.byname", name,
-		              strlen (name), &nis_val, &nis_vallen) == 0) {
-
-			cp = strchr (nis_val, '\n');
-			if (NULL != cp) {
-				*cp = '\0';
-			}
-
-			nis_state = middle;
-			sp = my_sgetspent (nis_val);
-			if (NULL != sp) {
-				strcpy (save_name, sp->sp_namp);
-				nis_key = save_name;
-				nis_keylen = strlen (save_name);
-			}
-			endspent ();
-			return sp;
-		} else {
-			nis_state = native2;
-		}
-	}
-#endif
-#ifdef	USE_NIS
-	/*
-	 * NEEDSWORK -- this is a mess, and it is the same mess in the
-	 * other three files.  I can't just blindly turn off NIS because
-	 * this might be the first pass through the local files.  In
-	 * that case, I never discover that NIS is present.
-	 */
-
-	if (nis_used) {
-		nis_ignore = true;
-		nis_disabled = true;
-	}
-#endif
-	while ((sp = getspent ()) != (struct spwd *) 0) {
+	while ((sp = getspent ()) != NULL) {
 		if (strcmp (name, sp->sp_namp) == 0) {
 			break;
 		}
 	}
-#ifdef	USE_NIS
-	if (nis_disabled) {
-		nis_ignore = false;
-	}
-#endif
 	endspent ();
 	return (sp);
 }
 #else
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif
-
diff --git a/lib/shadowio.c b/lib/shadowio.c
index 683b6c8..d2c3b47 100644
--- a/lib/shadowio.c
+++ b/lib/shadowio.c
@@ -31,7 +31,8 @@ static /*@null@*/ /*@only@*/void *shadow_dup (const void *ent)
 	return __spw_dup (sp);
 }
 
-static void shadow_free (/*@out@*//*@only@*/void *ent)
+static void
+shadow_free(/*@only@*/void *ent)
 {
 	struct spwd *sp = ent;
 
@@ -47,7 +48,7 @@ static const char *shadow_getname (const void *ent)
 
 static void *shadow_parse (const char *line)
 {
-	return (void *) sgetspent (line);
+	return sgetspent (line);
 }
 
 static int shadow_put (const void *ent, FILE * file)
@@ -164,7 +165,7 @@ int spw_open (int mode)
 
 int spw_update (const struct spwd *sp)
 {
-	return commonio_update (&shadow_db, (const void *) sp);
+	return commonio_update (&shadow_db, sp);
 }
 
 int spw_remove (const char *name)
diff --git a/lib/shadowlog_internal.h b/lib/shadowlog_internal.h
index 72a0e0c..f972a3c 100644
--- a/lib/shadowlog_internal.h
+++ b/lib/shadowlog_internal.h
@@ -2,6 +2,6 @@
 #define _SHADOWLOG_INTERNAL_H
 
 extern const char *shadow_progname; /* Program name showed in error messages */
-extern FILE *shadow_logfd;  /* file descripter to which error messages are printed */
+extern FILE *shadow_logfd;  /* file descriptor to which error messages are printed */
 
 #endif /* _SHADOWLOG_INTERNAL_H */
diff --git a/lib/shadowmem.c b/lib/shadowmem.c
index 82f99e7..9d8f193 100644
--- a/lib/shadowmem.c
+++ b/lib/shadowmem.c
@@ -16,18 +16,20 @@
 #include "defines.h"
 #include <shadow.h>
 #include <stdio.h>
+
+#include "alloc.h"
+#include "memzero.h"
 #include "shadowio.h"
 
 /*@null@*/ /*@only@*/struct spwd *__spw_dup (const struct spwd *spent)
 {
 	struct spwd *sp;
 
-	sp = (struct spwd *) malloc (sizeof *sp);
+	sp = CALLOC (1, struct spwd);
 	if (NULL == sp) {
 		return NULL;
 	}
 	/* The libc might define other fields. They won't be copied. */
-	memset (sp, 0, sizeof *sp);
 	sp->sp_lstchg = spent->sp_lstchg;
 	sp->sp_min    = spent->sp_min;
 	sp->sp_max    = spent->sp_max;
@@ -54,7 +56,8 @@
 	return sp;
 }
 
-void spw_free (/*@out@*/ /*@only@*/struct spwd *spent)
+void
+spw_free(/*@only@*/struct spwd *spent)
 {
 	if (spent != NULL) {
 		free (spent->sp_namp);
diff --git a/lib/shell.c b/lib/shell.c
new file mode 100644
index 0000000..25ef3e3
--- /dev/null
+++ b/lib/shell.c
@@ -0,0 +1,82 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1991, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2009       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <errno.h>
+#include "prototypes.h"
+#include "defines.h"
+#include "string/sprintf.h"
+
+
+extern char **newenvp;
+extern size_t newenvc;
+
+/*
+ * shell - execute the named program
+ *
+ *	shell begins by trying to figure out what argv[0] is going to
+ *	be for the named process.  The user may pass in that argument,
+ *	or it will be the last pathname component of the file with a
+ *	'-' prepended.
+ *	Then, it executes the named file.
+ */
+
+int shell (const char *file, /*@null@*/const char *arg, char *const envp[])
+{
+	int   err;
+	char  arg0[1024];
+
+	if (file == NULL) {
+		errno = EINVAL;
+		return errno;
+	}
+
+	/*
+	 * The argv[0]'th entry is usually the path name, but
+	 * for various reasons the invoker may want to override
+	 * that.  So, we determine the 0'th entry only if they
+	 * don't want to tell us what it is themselves.
+	 */
+	if (arg == NULL) {
+		SNPRINTF(arg0, "-%s", Basename(file));
+		arg = arg0;
+	}
+
+	/*
+	 * First we try the direct approach.  The system should be
+	 * able to figure out what we are up to without too much
+	 * grief.
+	 */
+	(void) execle (file, arg, (char *) NULL, envp);
+	err = errno;
+
+	if (access (file, R_OK|X_OK) == 0) {
+		/*
+		 * Assume this is a shell script (with no shebang).
+		 * Interpret it with /bin/sh
+		 */
+		(void) execle (SHELL, "sh", "-", file, (char *) NULL, envp);
+		err = errno;
+	}
+
+	/*
+	 * Obviously something is really wrong - I can't figure out
+	 * how to execute this stupid shell, so I might as well give
+	 * up in disgust ...
+	 */
+	SNPRINTF(arg0, _("Cannot execute %s"), file);
+	errno = err;
+	perror (arg0);
+	return err;
+}
+
diff --git a/lib/sizeof.h b/lib/sizeof.h
new file mode 100644
index 0000000..6847068
--- /dev/null
+++ b/lib/sizeof.h
@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText: 2022-2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIBMISC_SIZEOF_H_
+#define SHADOW_INCLUDE_LIBMISC_SIZEOF_H_
+
+
+#include <config.h>
+
+#include <limits.h>
+
+#include "must_be.h"
+
+
+#define memberof(T, member)  ((T){}.member)
+#define WIDTHOF(x)           (sizeof(x) * CHAR_BIT)
+#define SIZEOF_ARRAY(a)      (sizeof(a) + must_be_array(a))
+#define NITEMS(a)            (SIZEOF_ARRAY((a)) / sizeof((a)[0]))
+#define STRLEN(s)            (NITEMS(s) - 1)
+
+
+#endif  // include guard
diff --git a/lib/spawn.c b/lib/spawn.c
index ce1a97d..57a4121 100644
--- a/lib/spawn.c
+++ b/lib/spawn.c
@@ -17,8 +17,9 @@
 
 #include "shadowlog_internal.h"
 
-int run_command (const char *cmd, const char *argv[],
-                 /*@null@*/const char *envp[], /*@out@*/int *status)
+int
+run_command(const char *cmd, const char *argv[],
+            /*@null@*/const char *envp[], int *restrict status)
 {
 	pid_t pid, wpid;
 
diff --git a/lib/sssd.c b/lib/sssd.c
index 786ccd6..fadb378 100644
--- a/lib/sssd.c
+++ b/lib/sssd.c
@@ -4,8 +4,11 @@
 #ifdef USE_SSSD
 
 #include <stdio.h>
+#include <sys/stat.h>
 #include <sys/wait.h>
 #include <sys/types.h>
+
+#include "alloc.h"
 #include "exitcodes.h"
 #include "defines.h"
 #include "prototypes.h"
@@ -19,12 +22,17 @@ int sssd_flush_cache (int dbflags)
 {
 	int status, code, rv;
 	const char *cmd = "/usr/sbin/sss_cache";
+	struct stat sb;
 	char *sss_cache_args = NULL;
 	const char *spawnedArgs[] = {"sss_cache", NULL, NULL};
 	const char *spawnedEnv[] = {NULL};
 	int i = 0;
 
-	sss_cache_args = malloc(4);
+	rv = stat(cmd, &sb);
+	if (rv == -1 && errno == ENOENT)
+		return 0;
+
+	sss_cache_args = MALLOC(4, char);
 	if (sss_cache_args == NULL) {
 	    return -1;
 	}
@@ -70,6 +78,6 @@ int sssd_flush_cache (int dbflags)
 	return 0;
 }
 #else				/* USE_SSSD */
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/* USE_SSSD */
 
diff --git a/lib/string/sprintf.c b/lib/string/sprintf.c
new file mode 100644
index 0000000..cf3c210
--- /dev/null
+++ b/lib/string/sprintf.c
@@ -0,0 +1,24 @@
+/*
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include "string/sprintf.h"
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+
+
+extern inline int xasprintf(char **restrict s, const char *restrict fmt, ...);
+extern inline int xvasprintf(char **restrict s, const char *restrict fmt,
+    va_list ap);
+
+extern inline int snprintf_(char *restrict s, size_t size,
+    const char *restrict fmt, ...);
+extern inline int vsnprintf_(char *restrict s, size_t size,
+    const char *restrict fmt, va_list ap);
diff --git a/lib/string/sprintf.h b/lib/string/sprintf.h
new file mode 100644
index 0000000..7485369
--- /dev/null
+++ b/lib/string/sprintf.h
@@ -0,0 +1,97 @@
+/*
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_SPRINTF_H_
+#define SHADOW_INCLUDE_LIB_SPRINTF_H_
+
+
+#include <config.h>
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "attr.h"
+#include "defines.h"
+#include "sizeof.h"
+
+
+#define SNPRINTF(s, fmt, ...)                                                 \
+	snprintf_(s, NITEMS(s), fmt __VA_OPT__(,) __VA_ARGS__)
+
+
+format_attr(printf, 2, 3)
+inline int xasprintf(char **restrict s, const char *restrict fmt, ...);
+format_attr(printf, 2, 0)
+inline int xvasprintf(char **restrict s, const char *restrict fmt, va_list ap);
+
+format_attr(printf, 3, 4)
+inline int snprintf_(char *restrict s, size_t size, const char *restrict fmt,
+    ...);
+format_attr(printf, 3, 0)
+inline int vsnprintf_(char *restrict s, size_t size, const char *restrict fmt,
+    va_list ap);
+
+
+inline int
+xasprintf(char **restrict s, const char *restrict fmt, ...)
+{
+	int      len;
+	va_list  ap;
+
+	va_start(ap, fmt);
+	len = xvasprintf(s, fmt, ap);
+	va_end(ap);
+
+	return len;
+}
+
+
+inline int
+xvasprintf(char **restrict s, const char *restrict fmt, va_list ap)
+{
+	int  len;
+
+	len = vasprintf(s, fmt, ap);
+	if (len == -1) {
+		perror("asprintf");
+		exit(EXIT_FAILURE);
+	}
+
+	return len;
+}
+
+
+inline int
+snprintf_(char *restrict s, size_t size, const char *restrict fmt, ...)
+{
+	int      len;
+	va_list  ap;
+
+	va_start(ap, fmt);
+	len = vsnprintf_(s, size, fmt, ap);
+	va_end(ap);
+
+	return len;
+}
+
+
+inline int
+vsnprintf_(char *restrict s, size_t size, const char *restrict fmt, va_list ap)
+{
+	int  len;
+
+	len = vsnprintf(s, size, fmt, ap);
+	if (len == -1)
+		return -1;
+	if ((size_t) len >= size)
+		return -1;
+
+	return len;
+}
+
+
+#endif  // include guard
diff --git a/lib/string/stpecpy.c b/lib/string/stpecpy.c
new file mode 100644
index 0000000..9759388
--- /dev/null
+++ b/lib/string/stpecpy.c
@@ -0,0 +1,20 @@
+/*
+ * SPDX-FileCopyrightText:  2022 - 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#if !defined(HAVE_STPECPY)
+
+#ident "$Id$"
+
+#include "string/stpecpy.h"
+
+
+extern inline char *stpecpy(char *dst, char *end, const char *restrict src);
+
+
+#endif  // !HAVE_STPECPY
diff --git a/lib/string/stpecpy.h b/lib/string/stpecpy.h
new file mode 100644
index 0000000..2324baa
--- /dev/null
+++ b/lib/string/stpecpy.h
@@ -0,0 +1,90 @@
+/*
+ * SPDX-FileCopyrightText:  2022 - 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_STPECPY_H_
+#define SHADOW_INCLUDE_LIB_STPECPY_H_
+
+
+#include <config.h>
+
+#if !defined(HAVE_STPECPY)
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "attr.h"
+
+
+ATTR_STRING(3)
+inline char *stpecpy(char *dst, char *end, const char *restrict src);
+
+
+/*
+ * SYNOPSIS
+ *	[[gnu::null_terminated_string_arg(3)]]
+ *	char *_Nullable stpecpy(char *_Nullable dst, char end[0],
+ *	                        const char *restrict src);
+ *
+ * ARGUMENTS
+ *	dst	Destination buffer where to copy a string.
+ *
+ *	end	Pointer to one after the last element of the buffer
+ *		pointed to by `dst`.  Usually, it should be calculated
+ *		as `dst + NITEMS(dst)`.
+ *
+ *	src	Source string to be copied into dst.
+ *
+ * DESCRIPTION
+ *	This function copies the string pointed to by src, into a string
+ *	at the buffer pointed to by dst.  If the destination buffer,
+ *	limited by a pointer to its end --one after its last element--,
+ *	isn't large enough to hold the copy, the resulting string is
+ *	truncated.
+ *
+ *	This function can be chained with calls to [v]stpeprintf().
+ *
+ * RETURN VALUE
+ *	dst + strlen(dst)
+ *		•  On success, this function returns a pointer to the
+ *		   terminating NUL byte.
+ *
+ *	end
+ *		•  If this call truncated the resulting string.
+ *		•  If `dst == end` (a previous chained call to these
+ *		   functions truncated).
+ *	NULL
+ *		•  If `dst == NULL` (a previous chained call to
+ *		   [v]stpeprintf() failed).
+ *
+ * ERRORS
+ *	This function doesn't set errno.
+ */
+
+
+inline char *
+stpecpy(char *dst, char *end, const char *restrict src)
+{
+	bool    trunc;
+	size_t  dsize, dlen, slen;
+
+	if (dst == end)
+		return end;
+	if (dst == NULL)
+		return NULL;
+
+	dsize = end - dst;
+	slen = strnlen(src, dsize);
+	trunc = (slen == dsize);
+	dlen = slen - trunc;
+
+	return stpcpy(mempcpy(dst, src, dlen), "") + trunc;
+}
+
+
+#endif  // !HAVE_STPECPY
+#endif  // include guard
diff --git a/lib/string/stpeprintf.c b/lib/string/stpeprintf.c
new file mode 100644
index 0000000..cecd95d
--- /dev/null
+++ b/lib/string/stpeprintf.c
@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText:  2022 - 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#if !defined(HAVE_STPEPRINTF)
+
+#ident "$Id$"
+
+#include "string/stpeprintf.h"
+
+#include <stdarg.h>
+
+
+extern inline char *stpeprintf(char *dst, char *end, const char *restrict fmt,
+    ...);
+extern inline char *vstpeprintf(char *dst, char *end, const char *restrict fmt,
+    va_list ap);
+
+
+#endif  // !HAVE_STPEPRINTF
diff --git a/lib/string/stpeprintf.h b/lib/string/stpeprintf.h
new file mode 100644
index 0000000..14ee7b6
--- /dev/null
+++ b/lib/string/stpeprintf.h
@@ -0,0 +1,120 @@
+/*
+ * SPDX-FileCopyrightText:  2022 - 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier:  BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_STPEPRINTF_H_
+#define SHADOW_INCLUDE_LIB_STPEPRINTF_H_
+
+
+#include <config.h>
+
+#if !defined(HAVE_STPEPRINTF)
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#include "attr.h"
+#include "defines.h"
+
+
+format_attr(printf, 3, 4)
+inline char *stpeprintf(char *dst, char *end, const char *restrict fmt, ...);
+
+format_attr(printf, 3, 0)
+inline char *vstpeprintf(char *dst, char *end, const char *restrict fmt,
+    va_list ap);
+
+
+/*
+ * SYNOPSIS
+ *	[[gnu::format(printf, 3, 4)]]
+ *	char *_Nullable stpeprintf(char *_Nullable dst, char end[0],
+ *	                           const char *restrict fmt, ...);
+ *
+ *	[[gnu::format(printf, 3, 0)]]
+ *	char *_Nullable vstpeprintf(char *_Nullable dst, char end[0],
+ *	                           const char *restrict fmt, va_list ap);
+ *
+ *
+ * ARGUMENTS
+ *	dst	Destination buffer where to write a string.
+ *
+ *	end	Pointer to one after the last element of the buffer
+ *		pointed to by `dst`.  Usually, it should be calculated
+ *		as `dst + NITEMS(dst)`.
+ *
+ *	fmt	Format string
+ *
+ *	...
+ *	ap	Variadic argument list
+ *
+ * DESCRIPTION
+ *	These functions are very similar to [v]snprintf(3).
+ *
+ *	The destination buffer is limited by a pointer to its end --one
+ *	after its last element-- instead of a size.  This allows
+ *	chaining calls to it safely, unlike [v]snprintf(3), which is
+ *	difficult to chain without invoking Undefined Behavior.
+ *
+ * RETURN VALUE
+ *	dst + strlen(dst)
+ *		•  On success, these functions return a pointer to the
+ *		   terminating NUL byte.
+ *
+ *	end
+ *		•  If this call truncated the resulting string.
+ *		•  If `dst == end` (a previous chained call to these
+ *		   functions truncated).
+ *	NULL
+ *		•  If this function failed (see ERRORS).
+ *		•  If `dst == NULL` (a previous chained call to these
+ *		   functions failed).
+ *
+ * ERRORS
+ *	These functions may fail for the same reasons as vsnprintf(3).
+ */
+
+
+inline char *
+stpeprintf(char *dst, char *end, const char *restrict fmt, ...)
+{
+	char     *p;
+	va_list  ap;
+
+	va_start(ap, fmt);
+	p = vstpeprintf(dst, end, fmt, ap);
+	va_end(ap);
+
+	return p;
+}
+
+
+inline char *
+vstpeprintf(char *dst, char *end, const char *restrict fmt, va_list ap)
+{
+	int        len;
+	ptrdiff_t  size;
+
+	if (dst == end)
+		return end;
+	if (dst == NULL)
+		return NULL;
+
+	size = end - dst;
+	len = vsnprintf(dst, size, fmt, ap);
+
+	if (len == -1)
+		return NULL;
+	if (len >= size)
+		return end;
+
+	return dst + len;
+}
+
+
+#endif  // !HAVE_STPEPRINTF
+#endif  // include guard
diff --git a/lib/string/strftime.c b/lib/string/strftime.c
new file mode 100644
index 0000000..ea1deb3
--- /dev/null
+++ b/lib/string/strftime.c
@@ -0,0 +1,7 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "strftime.h"
diff --git a/lib/string/strftime.h b/lib/string/strftime.h
new file mode 100644
index 0000000..bebb31a
--- /dev/null
+++ b/lib/string/strftime.h
@@ -0,0 +1,19 @@
+// SPDX-FileCopyrightText: 2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRFTIME_H_
+#define SHADOW_INCLUDE_LIB_STRFTIME_H_
+
+
+#include <config.h>
+
+#include <time.h>
+
+#include "sizeof.h"
+
+
+#define STRFTIME(dst, fmt, ...)  strftime(dst, NITEMS(dst), fmt, __VA_ARGS__)
+
+
+#endif  // include guard
diff --git a/lib/string/strncpy.h b/lib/string/strncpy.h
new file mode 100644
index 0000000..fc6fcc9
--- /dev/null
+++ b/lib/string/strncpy.h
@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRNCPY_H_
+#define SHADOW_INCLUDE_LIB_STRNCPY_H_
+
+
+#include <config.h>
+
+#include <string.h>
+
+#include "sizeof.h"
+
+
+#define STRNCPY(dst, src)  strncpy(dst, src, NITEMS(dst))
+
+
+#endif  // include guard
diff --git a/lib/string/strtcpy.c b/lib/string/strtcpy.c
new file mode 100644
index 0000000..74de4fc
--- /dev/null
+++ b/lib/string/strtcpy.c
@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: 2022-2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#include <stddef.h>
+#include <sys/types.h>
+
+#ident "$Id$"
+
+#include "string/strtcpy.h"
+
+
+extern inline ssize_t strtcpy(char *restrict dst, const char *restrict src,
+    size_t dsize);
diff --git a/lib/string/strtcpy.h b/lib/string/strtcpy.h
new file mode 100644
index 0000000..4ff6e11
--- /dev/null
+++ b/lib/string/strtcpy.h
@@ -0,0 +1,80 @@
+/*
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRTCPY_H_
+#define SHADOW_INCLUDE_LIB_STRTCPY_H_
+
+
+#include <config.h>
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/types.h>
+
+#include "attr.h"
+#include "defines.h"
+#include "sizeof.h"
+
+
+/*
+ * SYNOPSIS
+ *	[[gnu::null_terminated_string_arg(2)]]
+ *	int STRTCPY(char dst[restrict], const char *restrict src);
+ *
+ * ARGUMENTS
+ *	dst	Destination buffer where to copy a string.
+ *	src	Source string to be copied into dst.
+ *
+ * DESCRIPTION
+ *	This macro copies the string pointed to by src, into a string
+ *	at the buffer pointed to by dst.  If the destination buffer,
+ *	isn't large enough to hold the copy, the resulting string is
+ *	truncated.  The size of the buffer is calculated internally via
+ *	NITEMS().
+ *
+ * RETURN VALUE
+ *	-1	If this call truncated the resulting string.
+ *
+ *	strlen(dst)
+ *		On success.
+ *
+ * ERRORS
+ *	This function doesn't set errno.
+ */
+
+
+#define STRTCPY(dst, src)  strtcpy(dst, src, NITEMS(dst))
+
+
+ATTR_STRING(2)
+inline ssize_t strtcpy(char *restrict dst, const char *restrict src,
+    size_t dsize);
+
+
+inline ssize_t
+strtcpy(char *restrict dst, const char *restrict src, size_t dsize)
+{
+	bool    trunc;
+	size_t  dlen, slen;
+
+	if (dsize == 0)
+		return -1;
+
+	slen = strnlen(src, dsize);
+	trunc = (slen == dsize);
+	dlen = slen - trunc;
+
+	stpcpy(mempcpy(dst, src, dlen), "");
+
+	if (trunc)
+		return -1;
+
+	return slen;
+}
+
+
+#endif  // include guard
diff --git a/lib/string/zustr2stp.h b/lib/string/zustr2stp.h
new file mode 100644
index 0000000..152102b
--- /dev/null
+++ b/lib/string/zustr2stp.h
@@ -0,0 +1,58 @@
+// SPDX-FileCopyrightText: 2022-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_STRING_ZUSTR2STP_H_
+#define SHADOW_INCLUDE_LIB_STRING_ZUSTR2STP_H_
+
+
+#include <config.h>
+
+#include <assert.h>
+#include <string.h>
+
+#include "must_be.h"
+#include "sizeof.h"
+
+
+/*
+ * SYNOPSIS
+ *	char *ZUSTR2STP(char *restrict dst, const char src[restrict]);
+ *
+ * ARGUMENTS
+ *	dst	Destination buffer.
+ *	src	Source null-padded character sequence.
+ *
+ * DESCRIPTION
+ *	This macro copies at most NITEMS(src) non-null bytes from the
+ *	array pointed to by src, followed by a null character, to the
+ *	buffer pointed to by dst.
+ *
+ * RETURN VALUE
+ *	dst + strlen(dst)
+ *		This function returns a pointer to the terminating NUL
+ *		byte.
+ *
+ * CAVEATS
+ *	This function doesn't know the size of the destination buffer.
+ *	It assumes it will always be large enough.  Since the size of
+ *	the source buffer is known to the caller, it should make sure to
+ *	allocate a destination buffer of at least `NITEMS(src) + 1`.
+ *
+ * EXAMPLES
+ *	char  hostname[NITEMS(utmp->ut_host) + 1];
+ *
+ *	len = ZUSTR2STP(hostname, utmp->ut_host) - hostname;
+ *	puts(hostname);
+ */
+
+
+#define ZUSTR2STP(dst, src)                                                   \
+({                                                                            \
+	static_assert(!is_array(dst) || sizeof(dst) > SIZEOF_ARRAY(src), ""); \
+                                                                              \
+	stpcpy(mempcpy(dst, src, strnlen(src, NITEMS(src))), "");             \
+})
+
+
+#endif  // include guard
diff --git a/lib/strtoday.c b/lib/strtoday.c
new file mode 100644
index 0000000..dabd5b5
--- /dev/null
+++ b/lib/strtoday.c
@@ -0,0 +1,77 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include <ctype.h>
+
+#ident "$Id$"
+
+#include "atoi/str2i.h"
+#include "prototypes.h"
+#include "getdate.h"
+
+
+/*
+ * strtoday() now uses get_date() (borrowed from GNU shellutils)
+ * which can handle many date formats, for example:
+ *	1970-09-17	# ISO 8601.
+ *	70-9-17		# This century assumed by default.
+ *	70-09-17	# Leading zeros are ignored.
+ *	9/17/72		# Common U.S. writing.
+ *	24 September 1972
+ *	24 Sept 72	# September has a special abbreviation.
+ *	24 Sep 72	# Three-letter abbreviations always allowed.
+ *	Sep 24, 1972
+ *	24-sep-72
+ *	24sep72
+ */
+long strtoday (const char *str)
+{
+	time_t t;
+	bool isnum = true;
+	const char *s = str;
+
+	/*
+	 * get_date() interprets an empty string as the current date,
+	 * which is not what we expect, unless you're a BOFH :-).
+	 * (useradd sets sp_expire = current date for new lusers)
+	 */
+	if ((NULL == str) || ('\0' == *str)) {
+		return -1;
+	}
+
+	/* If a numerical value is provided, this is already a number of
+	 * days since EPOCH.
+	 */
+	if ('-' == *s) {
+		s++;
+	}
+	while (' ' == *s) {
+		s++;
+	}
+	while (isnum && ('\0' != *s)) {
+		if (!isdigit (*s)) {
+			isnum = false;
+		}
+		s++;
+	}
+	if (isnum) {
+		long retdate;
+		if (str2sl(&retdate, str) == -1)
+			return -2;
+		return retdate;
+	}
+
+	t = get_date(str, NULL);
+	if ((time_t) - 1 == t) {
+		return -2;
+	}
+	return t / DAY;
+}
diff --git a/lib/sub.c b/lib/sub.c
new file mode 100644
index 0000000..d8e2447
--- /dev/null
+++ b/lib/sub.c
@@ -0,0 +1,69 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1991, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2006, Tomasz Kłoczko
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <pwd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include "prototypes.h"
+#include "defines.h"
+#define	MAX_SUBROOT2	"maximum subsystem depth reached\n"
+#define	BAD_SUBROOT2	"invalid root `%s' for user `%s'\n"
+#define	NO_SUBROOT2	"no subsystem root `%s' for user `%s'\n"
+#define	MAX_DEPTH	1024
+/*
+ * subsystem - change to subsystem root
+ *
+ *	A subsystem login is indicated by the presence of a "*" as
+ *	the first character of the login shell.  The given home
+ *	directory will be used as the root of a new filesystem which
+ *	the user is actually logged into.
+ */
+void subsystem (const struct passwd *pw)
+{
+	static int depth = 0;
+
+	/*
+	 * Prevent endless loop on misconfigured systems.
+	 */
+	if (++depth > MAX_DEPTH) {
+		printf (_("Maximum subsystem depth reached\n"));
+		SYSLOG ((LOG_WARN, MAX_SUBROOT2));
+		closelog ();
+		exit (EXIT_FAILURE);
+	}
+
+	/*
+	 * The new root directory must begin with a "/" character.
+	 */
+
+	if (pw->pw_dir[0] != '/') {
+		printf (_("Invalid root directory '%s'\n"), pw->pw_dir);
+		SYSLOG ((LOG_WARN, BAD_SUBROOT2, pw->pw_dir, pw->pw_name));
+		closelog ();
+		exit (EXIT_FAILURE);
+	}
+
+	/*
+	 * The directory must be accessible and the current process
+	 * must be able to change into it.
+	 */
+
+	if (   (chroot (pw->pw_dir) != 0)
+	    || (chdir ("/") != 0)) {
+		(void) printf (_("Can't change root directory to '%s'\n"),
+		               pw->pw_dir);
+		SYSLOG ((LOG_WARN, NO_SUBROOT2, pw->pw_dir, pw->pw_name));
+		closelog ();
+		exit (EXIT_FAILURE);
+	}
+}
+
diff --git a/lib/subordinateio.c b/lib/subordinateio.c
index bd1af26..e7cd4b4 100644
--- a/lib/subordinateio.c
+++ b/lib/subordinateio.c
@@ -16,6 +16,12 @@
 #include <pwd.h>
 #include <ctype.h>
 #include <fcntl.h>
+#include <string.h>
+
+#include "alloc.h"
+#include "atoi/str2i.h"
+#include "string/sprintf.h"
+
 
 #define ID_SIZE 31
 
@@ -32,7 +38,7 @@ static /*@null@*/ /*@only@*/void *subordinate_dup (const void *ent)
 	const struct subordinate_range *rangeent = ent;
 	struct subordinate_range *range;
 
-	range = (struct subordinate_range *) malloc (sizeof *range);
+	range = MALLOC(1, struct subordinate_range);
 	if (NULL == range) {
 		return NULL;
 	}
@@ -52,7 +58,8 @@ static /*@null@*/ /*@only@*/void *subordinate_dup (const void *ent)
  *
  * @ent: pointer to a subordinate_range struct to free.
  */
-static void subordinate_free (/*@out@*/ /*@only@*/void *ent)
+static void
+subordinate_free(/*@only@*/void *ent)
 {
 	struct subordinate_range *rangeent = ent;
 
@@ -69,7 +76,8 @@ static void subordinate_free (/*@out@*/ /*@only@*/void *ent)
  * in @line, or NULL on failure.  Note that the returned value should not
  * be freed by the caller.
  */
-static void *subordinate_parse (const char *line)
+static void *
+subordinate_parse(const char *line)
 {
 	static struct subordinate_range range;
 	static char rangebuf[1024];
@@ -90,19 +98,8 @@ static void *subordinate_parse (const char *line)
 	 * field.  The fields are converted into NUL terminated strings.
 	 */
 
-	for (cp = rangebuf, i = 0; (i < SUBID_NFIELDS) && (NULL != cp); i++) {
-		fields[i] = cp;
-		while (('\0' != *cp) && (':' != *cp)) {
-			cp++;
-		}
-
-		if ('\0' != *cp) {
-			*cp = '\0';
-			cp++;
-		} else {
-			cp = NULL;
-		}
-	}
+	for (cp = rangebuf, i = 0; (i < SUBID_NFIELDS) && (NULL != cp); i++)
+		fields[i] = strsep(&cp, ":");
 
 	/*
 	 * There must be exactly SUBID_NFIELDS colon separated fields or
@@ -111,9 +108,9 @@ static void *subordinate_parse (const char *line)
 	if (i != SUBID_NFIELDS || *fields[0] == '\0' || *fields[1] == '\0' || *fields[2] == '\0')
 		return NULL;
 	range.owner = fields[0];
-	if (getulong (fields[1], &range.start) == 0)
+	if (str2ul(&range.start, fields[1]) == -1)
 		return NULL;
-	if (getulong (fields[2], &range.count) == 0)
+	if (str2ul(&range.count, fields[2]) == -1)
 		return NULL;
 
 	return &range;
@@ -208,7 +205,7 @@ static const struct subordinate_range *find_range(struct commonio_db *db,
         /*
          * We only do special handling for these two files
          */
-        if ((0 != strcmp(db->filename, "/etc/subuid")) && (0 != strcmp(db->filename, "/etc/subgid")))
+        if ((0 != strcmp(db->filename, SUBUID_FILE)) && (0 != strcmp(db->filename, SUBGID_FILE)))
                 return NULL;
 
         /*
@@ -218,9 +215,9 @@ static const struct subordinate_range *find_range(struct commonio_db *db,
          * (It may be specified as literal UID or as another username which
          * has the same UID as the username we are looking for.)
          */
-        struct passwd *pwd;
+        char           owner_uid_string[33];
         uid_t          owner_uid;
-        char           owner_uid_string[33] = "";
+        struct passwd  *pwd;
 
 
         /* Get UID of the username we are looking for */
@@ -230,7 +227,8 @@ static const struct subordinate_range *find_range(struct commonio_db *db,
                 return NULL;
         }
         owner_uid = pwd->pw_uid;
-        sprintf(owner_uid_string, "%lu", (unsigned long int)owner_uid);
+        if (SNPRINTF(owner_uid_string, "%lu", (unsigned long) owner_uid) == -1)
+                return NULL;
 
         commonio_rewind(db);
         while ((range = commonio_next(db)) != NULL) {
@@ -313,19 +311,16 @@ static bool have_range(struct commonio_db *db,
 
 static bool append_range(struct subid_range **ranges, const struct subordinate_range *new, int n)
 {
-	if (!*ranges) {
-		*ranges = malloc(sizeof(struct subid_range));
-		if (!*ranges)
-			return false;
-	} else {
-		struct subid_range *alloced;
-		alloced = realloc(*ranges, (n + 1) * (sizeof(struct subid_range)));
-		if (!alloced)
-			return false;
-		*ranges = alloced;
-	}
-	(*ranges)[n].start = new->start;
-	(*ranges)[n].count = new->count;
+	struct subid_range  *sr;
+
+	sr = REALLOC(*ranges, n + 1, struct subid_range);
+	if (!sr)
+		return false;
+
+	sr[n].start = new->start;
+	sr[n].count = new->count;
+	*ranges = sr;
+
 	return true;
 }
 
@@ -353,15 +348,19 @@ void free_subordinate_ranges(struct subordinate_range **ranges, int count)
  */
 static int subordinate_range_cmp (const void *p1, const void *p2)
 {
-	struct subordinate_range *range1, *range2;
+	const struct commonio_entry *const *ce1;
+	const struct commonio_entry *const *ce2;
+	const struct subordinate_range *range1, *range2;
 
-	if ((*(struct commonio_entry **) p1)->eptr == NULL)
+	ce1 = p1;
+	range1 = (*ce1)->eptr;
+	if (range1 == NULL)
 		return 1;
-	if ((*(struct commonio_entry **) p2)->eptr == NULL)
-		return -1;
 
-	range1 = ((struct subordinate_range *) (*(struct commonio_entry **) p1)->eptr);
-	range2 = ((struct subordinate_range *) (*(struct commonio_entry **) p2)->eptr);
+	ce2 = p2;
+	range2 = (*ce2)->eptr;
+	if (range2 == NULL)
+		return -1;
 
 	if (range1->start < range2->start)
 		return -1;
@@ -556,7 +555,7 @@ static int remove_range (struct commonio_db *db,
 }
 
 static struct commonio_db subordinate_uid_db = {
-	"/etc/subuid",		/* filename */
+	SUBUID_FILE,		/* filename */
 	&subordinate_ops,	/* ops */
 	NULL,			/* fp */
 #ifdef WITH_SELINUX
@@ -620,17 +619,28 @@ bool have_sub_uids(const char *owner, uid_t start, unsigned long count)
 	return have_range (&subordinate_uid_db, owner, start, count);
 }
 
+/*
+ * sub_uid_add: add a subuid range, perhaps through nss.
+ *
+ * Return 1 if the range is already present or on success.  On error
+ * return 0 and set errno appropriately.
+ */
 int sub_uid_add (const char *owner, uid_t start, unsigned long count)
 {
-	if (get_subid_nss_handle())
-		return -EOPNOTSUPP;
+	if (get_subid_nss_handle()) {
+		errno = EOPNOTSUPP;
+		return 0;
+	}
 	return add_range (&subordinate_uid_db, owner, start, count);
 }
 
+/* Return 1 on success.  on failure, return 0 and set errno appropriately */
 int sub_uid_remove (const char *owner, uid_t start, unsigned long count)
 {
-	if (get_subid_nss_handle())
-		return -EOPNOTSUPP;
+	if (get_subid_nss_handle()) {
+		errno = EOPNOTSUPP;
+		return 0;
+	}
 	return remove_range (&subordinate_uid_db, owner, start, count);
 }
 
@@ -652,7 +662,7 @@ uid_t sub_uid_find_free_range(uid_t min, uid_t max, unsigned long count)
 }
 
 static struct commonio_db subordinate_gid_db = {
-	"/etc/subgid",		/* filename */
+	SUBGID_FILE,		/* filename */
 	&subordinate_ops,	/* ops */
 	NULL,			/* fp */
 #ifdef WITH_SELINUX
@@ -716,17 +726,28 @@ bool local_sub_gid_assigned(const char *owner)
 	return range_exists (&subordinate_gid_db, owner);
 }
 
+/*
+ * sub_gid_add: add a subgid range, perhaps through nss.
+ *
+ * Return 1 if the range is already present or on success.  On error
+ * return 0 and set errno appropriately.
+ */
 int sub_gid_add (const char *owner, gid_t start, unsigned long count)
 {
-	if (get_subid_nss_handle())
-		return -EOPNOTSUPP;
+	if (get_subid_nss_handle()) {
+		errno = EOPNOTSUPP;
+		return 0;
+	}
 	return add_range (&subordinate_gid_db, owner, start, count);
 }
 
+/* Return 1 on success.  on failure, return 0 and set errno appropriately */
 int sub_gid_remove (const char *owner, gid_t start, unsigned long count)
 {
-	if (get_subid_nss_handle())
-		return -EOPNOTSUPP;
+	if (get_subid_nss_handle()) {
+		errno = EOPNOTSUPP;
+		return 0;
+	}
 	return remove_range (&subordinate_gid_db, owner, start, count);
 }
 
@@ -910,7 +931,7 @@ static int append_uids(uid_t **uids, const char *owner, int n)
 			return n;
 	}
 
-	ret = realloc(*uids, (n + 1) * sizeof(uid_t));
+	ret = REALLOC(*uids, n + 1, uid_t);
 	if (!ret) {
 		free(*uids);
 		return -1;
@@ -985,7 +1006,7 @@ bool new_subid_range(struct subordinate_range *range, enum subid_type id_type, b
 	switch (id_type) {
 	case ID_TYPE_UID:
 		if (!sub_uid_lock()) {
-			printf("Failed loging subuids (errno %d)\n", errno);
+			printf("Failed locking subuids (errno %d)\n", errno);
 			return false;
 		}
 		if (!sub_uid_open(O_CREAT | O_RDWR)) {
@@ -997,7 +1018,7 @@ bool new_subid_range(struct subordinate_range *range, enum subid_type id_type, b
 		break;
 	case ID_TYPE_GID:
 		if (!sub_gid_lock()) {
-			printf("Failed loging subgids (errno %d)\n", errno);
+			printf("Failed locking subgids (errno %d)\n", errno);
 			return false;
 		}
 		if (!sub_gid_open(O_CREAT | O_RDWR)) {
@@ -1057,7 +1078,7 @@ bool release_subid_range(struct subordinate_range *range, enum subid_type id_typ
 	switch (id_type) {
 	case ID_TYPE_UID:
 		if (!sub_uid_lock()) {
-			printf("Failed loging subuids (errno %d)\n", errno);
+			printf("Failed locking subuids (errno %d)\n", errno);
 			return false;
 		}
 		if (!sub_uid_open(O_CREAT | O_RDWR)) {
@@ -1069,7 +1090,7 @@ bool release_subid_range(struct subordinate_range *range, enum subid_type id_typ
 		break;
 	case ID_TYPE_GID:
 		if (!sub_gid_lock()) {
-			printf("Failed loging subgids (errno %d)\n", errno);
+			printf("Failed locking subgids (errno %d)\n", errno);
 			return false;
 		}
 		if (!sub_gid_open(O_CREAT | O_RDWR)) {
@@ -1097,6 +1118,6 @@ bool release_subid_range(struct subordinate_range *range, enum subid_type id_typ
 }
 
 #else				/* !ENABLE_SUBIDS */
-extern int errno;		/* warning: ANSI C forbids an empty source file */
+extern int ISO_C_forbids_an_empty_translation_unit;
 #endif				/* !ENABLE_SUBIDS */
 
diff --git a/lib/sulog.c b/lib/sulog.c
new file mode 100644
index 0000000..2ef22b2
--- /dev/null
+++ b/lib/sulog.c
@@ -0,0 +1,83 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1992, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <time.h>
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+
+/*
+ * sulog - log a SU command execution result
+ */
+void sulog (const char *tty, bool success, const char *oldname, const char *name)
+{
+	const char *sulog_file;
+	time_t now;
+	struct tm *tm;
+	FILE *fp;
+	mode_t oldmask;
+	gid_t oldgid = 0;
+
+	if (success) {
+		SYSLOG ((LOG_INFO,
+			"Successful su for %s by %s",name,oldname));
+	} else {
+		SYSLOG ((LOG_NOTICE,
+			"FAILED su for %s by %s",name,oldname));
+	}
+
+	sulog_file = getdef_str ("SULOG_FILE");
+	if (NULL == sulog_file) {
+		return;
+	}
+
+	oldgid = getgid ();
+	oldmask = umask (077);
+	/* Switch to group root to avoid creating the sulog file with
+	 * the wrong group ownership. */
+	if ((oldgid != 0) && (setgid (0) != 0)) {
+		SYSLOG ((LOG_INFO,
+		         "su session not logged to %s", sulog_file));
+		/* Continue, but do not switch back to oldgid later */
+		oldgid = 0;
+	}
+	fp = fopen (sulog_file, "a+");
+	(void) umask (oldmask);
+	if ((oldgid != 0) && (setgid (oldgid) != 0)) {
+		perror ("setgid");
+		SYSLOG ((LOG_ERR,
+		         "can't switch back to group `%d' in sulog",
+		         oldgid));
+		/* Do not return if the group permission were raised. */
+		exit (EXIT_FAILURE);
+	}
+	if (fp == NULL) {
+		return;		/* can't open or create logfile */
+	}
+
+	(void) time (&now);
+	tm = localtime (&now);
+
+	fprintf (fp, "SU %.02d/%.02d %.02d:%.02d %c %s %s-%s\n",
+		 tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min,
+		 success ? '+' : '-', tty, oldname, name);
+
+	(void) fflush (fp);
+	fsync (fileno (fp));
+	fclose (fp);
+	/* TODO: log if failure */
+}
+
diff --git a/lib/tcbfuncs.c b/lib/tcbfuncs.c
index 1ed5d03..b5915fc 100644
--- a/lib/tcbfuncs.c
+++ b/lib/tcbfuncs.c
@@ -141,7 +141,7 @@ static /*@null@*/ char *shadowtcb_path_rel_existing (const char *name)
 		         shadow_progname, link);
 		return NULL;
 	}
-	link[(size_t)ret] = '\0';
+	link[ret] = '\0';
 	rval = strdup (link);
 	if (NULL == rval) {
 		OUT_OF_MEMORY;
@@ -527,7 +527,7 @@ shadowtcb_status shadowtcb_create (const char *name, uid_t uid)
 	struct stat tcbdir_stat;
 	gid_t shadowgid, authgid;
 	struct group *gr;
-	int fd;
+	int fd = -1;
 	shadowtcb_status ret = SHADOWTCB_FAILURE;
 
 	if (!getdef_bool ("USE_TCB")) {
@@ -566,14 +566,13 @@ shadowtcb_status shadowtcb_create (const char *name, uid_t uid)
 		         shadow_progname, shadow, strerror (errno));
 		goto out_free;
 	}
-	close (fd);
-	if (chown (shadow, 0, authgid) != 0) {
+	if (fchown (fd, 0, authgid) != 0) {
 		fprintf (shadow_logfd,
 		         _("%s: Cannot change owner of %s: %s\n"),
 		         shadow_progname, shadow, strerror (errno));
 		goto out_free;
 	}
-	if (chmod (shadow, (mode_t) ((authgid == shadowgid) ? 0600 : 0640)) != 0) {
+	if (fchmod (fd, (mode_t) ((authgid == shadowgid) ? 0600 : 0640)) != 0) {
 		fprintf (shadow_logfd,
 		         _("%s: Cannot change mode of %s: %s\n"),
 		         shadow_progname, shadow, strerror (errno));
@@ -597,6 +596,8 @@ shadowtcb_status shadowtcb_create (const char *name, uid_t uid)
 	}
 	ret = SHADOWTCB_SUCCESS;
 out_free:
+	if (fd != -1)
+		close(fd);
 	free (dir);
 	free (shadow);
 	return ret;
diff --git a/lib/time/day_to_str.c b/lib/time/day_to_str.c
new file mode 100644
index 0000000..e3e4221
--- /dev/null
+++ b/lib/time/day_to_str.c
@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2021-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-FileCopyrightText: 2024, Tobias Stoeckmann <tobias@stoeckmann.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#include <config.h>
+
+#include "time/day_to_str.h"
+
+
+extern inline void day_to_str(size_t size, char buf[size], long day);
diff --git a/lib/time/day_to_str.h b/lib/time/day_to_str.h
new file mode 100644
index 0000000..96cec6e
--- /dev/null
+++ b/lib/time/day_to_str.h
@@ -0,0 +1,51 @@
+// SPDX-FileCopyrightText: 2021-2024, Alejandro Colomar <alx@kernel.org>
+// SPDX-FileCopyrightText: 2024, Tobias Stoeckmann <tobias@stoeckmann.org>
+// SPDX-License-Identifier: BSD-3-Clause
+
+
+#ifndef SHADOW_INCLUDE_LIB_TIME_DAY_TO_STR_H_
+#define SHADOW_INCLUDE_LIB_TIME_DAY_TO_STR_H_
+
+
+#include <config.h>
+
+#include <time.h>
+
+#include "defines.h"
+#include "sizeof.h"
+#include "string/strtcpy.h"
+
+
+#define DAY_TO_STR(str, day)   day_to_str(NITEMS(str), str, day)
+
+
+inline void day_to_str(size_t size, char buf[size], long day);
+
+
+inline void
+day_to_str(size_t size, char buf[size], long day)
+{
+	time_t     date;
+	struct tm  tm;
+
+	if (day < 0) {
+		strtcpy(buf, "never", size);
+		return;
+	}
+
+	if (__builtin_mul_overflow(day, DAY, &date)) {
+		strtcpy(buf, "future", size);
+		return;
+	}
+
+	if (gmtime_r(&date, &tm) == NULL) {
+		strtcpy(buf, "future", size);
+		return;
+	}
+
+	if (strftime(buf, size, "%Y-%m-%d", &tm) == 0)
+		strtcpy(buf, "future", size);
+}
+
+
+#endif  // include guard
diff --git a/lib/ttytype.c b/lib/ttytype.c
new file mode 100644
index 0000000..a9fb0e8
--- /dev/null
+++ b/lib/ttytype.c
@@ -0,0 +1,65 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include "prototypes.h"
+#include "defines.h"
+#include "getdef.h"
+/*
+ * ttytype - set ttytype from port to terminal type mapping database
+ */
+void ttytype (const char *line)
+{
+	FILE *fp;
+	char buf[BUFSIZ];
+	const char *typefile;
+	char *cp;
+	char type[1024] = "";
+	char port[1024];
+
+	if (getenv ("TERM") != NULL) {
+		return;
+	}
+	typefile = getdef_str ("TTYTYPE_FILE");
+	if (NULL == typefile) {
+		return;
+	}
+
+	fp = fopen (typefile, "r");
+	if (NULL == fp) {
+		if (errno != ENOENT)
+			perror (typefile);
+		return;
+	}
+	while (fgets (buf, sizeof buf, fp) == buf) {
+		if (buf[0] == '#') {
+			continue;
+		}
+
+		cp = strchr (buf, '\n');
+		if (NULL != cp) {
+			*cp = '\0';
+		}
+
+		if (   (sscanf (buf, "%1023s %1023s", type, port) == 2)
+		    && (strcmp (line, port) == 0)) {
+			break;
+		}
+	}
+	if ((feof (fp) == 0) && (ferror (fp) == 0) && (type[0] != '\0')) {
+		addenv ("TERM", type);
+	}
+
+	(void) fclose (fp);
+}
+
diff --git a/lib/tz.c b/lib/tz.c
new file mode 100644
index 0000000..83b295c
--- /dev/null
+++ b/lib/tz.c
@@ -0,0 +1,58 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1991 - 1994, Chip Rosenthal
+ * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2010, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ifndef USE_PAM
+
+#ident "$Id$"
+
+#include <stdio.h>
+#include <string.h>
+#include "defines.h"
+#include "prototypes.h"
+#include "getdef.h"
+
+/*
+ * tz - return local timezone name
+ *
+ * tz() determines the name of the local timezone by reading the
+ * contents of the file named by ``fname''.
+ */
+/*@observer@*/const char *tz (const char *fname)
+{
+	FILE *fp = NULL;
+	static char tzbuf[BUFSIZ];
+	const char *def_tz = "TZ=CST6CDT";
+
+	fp = fopen (fname, "r");
+	if (   (NULL == fp)
+	    || (fgets (tzbuf, sizeof (tzbuf), fp) == NULL)) {
+		def_tz = getdef_str ("ENV_TZ");
+		if ((NULL == def_tz) || ('/' == def_tz[0])) {
+			def_tz = "TZ=CST6CDT";
+		}
+
+		strcpy (tzbuf, def_tz);
+	} else {
+		/* Remove optional trailing '\n'. */
+		tzbuf[strcspn (tzbuf, "\n")] = '\0';
+	}
+
+	if (NULL != fp) {
+		(void) fclose (fp);
+	}
+
+	return tzbuf;
+}
+#else				/* !USE_PAM */
+extern int ISO_C_forbids_an_empty_translation_unit;
+#endif				/* !USE_PAM */
+
diff --git a/lib/ulimit.c b/lib/ulimit.c
new file mode 100644
index 0000000..45a184a
--- /dev/null
+++ b/lib/ulimit.c
@@ -0,0 +1,29 @@
+/*
+ * SPDX-FileCopyrightText: 1990 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1997, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008       , Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/time.h>
+#include <sys/resource.h>
+#include "prototypes.h"
+
+int set_filesize_limit (int blocks)
+{
+	int ret = -1;
+	struct rlimit rlimit_fsize;
+
+	rlimit_fsize.rlim_cur = 512L * blocks;
+	rlimit_fsize.rlim_max = rlimit_fsize.rlim_cur;
+	ret = setrlimit (RLIMIT_FSIZE, &rlimit_fsize);
+
+	return ret;
+}
+
diff --git a/lib/user_busy.c b/lib/user_busy.c
new file mode 100644
index 0000000..a622376
--- /dev/null
+++ b/lib/user_busy.c
@@ -0,0 +1,269 @@
+/*
+ * SPDX-FileCopyrightText: 1991 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 2000, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2000 - 2006, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id: $"
+
+#include <assert.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "defines.h"
+#include "prototypes.h"
+#ifdef ENABLE_SUBIDS
+#include "subordinateio.h"
+#endif				/* ENABLE_SUBIDS */
+#include "shadowlog.h"
+#include "string/sprintf.h"
+
+
+#ifdef __linux__
+static int check_status (const char *name, const char *sname, uid_t uid);
+static int user_busy_processes (const char *name, uid_t uid);
+#else				/* !__linux__ */
+static int user_busy_utmp (const char *name);
+#endif				/* !__linux__ */
+
+/*
+ * user_busy - check if a user is currently running processes
+ */
+int user_busy (const char *name, uid_t uid)
+{
+	/* There are no standard ways to get the list of processes.
+	 * An option could be to run an external tool (ps).
+	 */
+#ifdef __linux__
+	/* On Linux, directly parse /proc */
+	return user_busy_processes (name, uid);
+#else				/* !__linux__ */
+	/* If we cannot rely on /proc, check if there is a record in utmp
+	 * indicating that the user is still logged in */
+	return user_busy_utmp (name);
+#endif				/* !__linux__ */
+}
+
+
+#ifndef __linux__
+static int
+user_busy_utmp(const char *name)
+{
+	struct utmpx  *utent;
+
+	setutxent();
+	while ((utent = getutxent()) != NULL)
+	{
+		if (utent->ut_type != USER_PROCESS) {
+			continue;
+		}
+		if (strncmp (utent->ut_user, name, sizeof utent->ut_user) != 0) {
+			continue;
+		}
+		if (kill (utent->ut_pid, 0) != 0) {
+			continue;
+		}
+
+		fprintf (log_get_logfd(),
+		         _("%s: user %s is currently logged in\n"),
+		         log_get_progname(), name);
+		return 1;
+	}
+
+	return 0;
+}
+#endif				/* !__linux__ */
+
+
+#ifdef __linux__
+#ifdef ENABLE_SUBIDS
+#define in_parentuid_range(uid) ((uid) >= parentuid && (uid) < parentuid + range)
+static int different_namespace (const char *sname)
+{
+	/* 41: /proc/xxxxxxxxxx/task/xxxxxxxxxx/ns/user + \0 */
+	char     path[41];
+	char     buf[512], buf2[512];
+	ssize_t  llen1, llen2;
+
+	SNPRINTF(path, "/proc/%s/ns/user", sname);
+
+	if ((llen1 = readlink (path, buf, sizeof(buf))) == -1)
+		return 0;
+
+	if ((llen2 = readlink ("/proc/self/ns/user", buf2, sizeof(buf2))) == -1)
+		return 0;
+
+	if (llen1 == llen2 && memcmp (buf, buf2, llen1) == 0)
+		return 0; /* same namespace */
+
+	return 1;
+}
+#endif                          /* ENABLE_SUBIDS */
+
+
+static int check_status (const char *name, const char *sname, uid_t uid)
+{
+	/* 40: /proc/xxxxxxxxxx/task/xxxxxxxxxx/status + \0 */
+	char  status[40];
+	char  line[1024];
+	FILE  *sfile;
+
+	SNPRINTF(status, "/proc/%s/status", sname);
+
+	sfile = fopen (status, "r");
+	if (NULL == sfile) {
+		return 0;
+	}
+	while (fgets (line, sizeof (line), sfile) == line) {
+		if (strncmp (line, "Uid:\t", 5) == 0) {
+			unsigned long ruid, euid, suid;
+
+			assert (uid == (unsigned long) uid);
+			(void) fclose (sfile);
+			if (sscanf (line,
+			            "Uid:\t%lu\t%lu\t%lu\n",
+			            &ruid, &euid, &suid) == 3) {
+				if (   (ruid == (unsigned long) uid)
+				    || (euid == (unsigned long) uid)
+				    || (suid == (unsigned long) uid) ) {
+					return 1;
+				}
+#ifdef ENABLE_SUBIDS
+				if (    different_namespace (sname)
+				     && (   have_sub_uids(name, ruid, 1)
+				         || have_sub_uids(name, euid, 1)
+				         || have_sub_uids(name, suid, 1))
+				   ) {
+					return 1;
+				}
+#endif				/* ENABLE_SUBIDS */
+			} else {
+				/* Ignore errors. This is just a best effort. */
+			}
+			return 0;
+		}
+	}
+	(void) fclose (sfile);
+	return 0;
+}
+
+static int user_busy_processes (const char *name, uid_t uid)
+{
+	DIR            *proc;
+	DIR            *task_dir;
+	char           *tmp_d_name;
+	/* 22: /proc/xxxxxxxxxx/task + \0 */
+	char           task_path[22];
+	char           root_path[22];
+	pid_t          pid;
+	struct stat    sbroot;
+	struct stat    sbroot_process;
+	struct dirent  *ent;
+
+#ifdef ENABLE_SUBIDS
+	sub_uid_open (O_RDONLY);
+#endif				/* ENABLE_SUBIDS */
+
+	proc = opendir ("/proc");
+	if (proc == NULL) {
+		perror ("opendir /proc");
+#ifdef ENABLE_SUBIDS
+		sub_uid_close();
+#endif
+		return 0;
+	}
+	if (stat ("/", &sbroot) != 0) {
+		perror ("stat (\"/\")");
+		(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+		sub_uid_close();
+#endif
+		return 0;
+	}
+
+	while ((ent = readdir (proc)) != NULL) {
+		tmp_d_name = ent->d_name;
+		/*
+		 * Ingo Molnar's patch introducing NPTL for 2.4 hides
+		 * threads in the /proc directory by prepending a period.
+		 * This patch is applied by default in some RedHat
+		 * kernels.
+		 */
+		if (   (strcmp (tmp_d_name, ".") == 0)
+		    || (strcmp (tmp_d_name, "..") == 0)) {
+			continue;
+		}
+		if (*tmp_d_name == '.') {
+			tmp_d_name++;
+		}
+
+		/* Check if this is a valid PID */
+		if (get_pid(tmp_d_name, &pid) == -1) {
+			continue;
+		}
+
+		/* Check if the process is in our chroot */
+		SNPRINTF(root_path, "/proc/%lu/root", (unsigned long) pid);
+		if (stat (root_path, &sbroot_process) != 0) {
+			continue;
+		}
+		if (   (sbroot.st_dev != sbroot_process.st_dev)
+		    || (sbroot.st_ino != sbroot_process.st_ino)) {
+			continue;
+		}
+
+		if (check_status (name, tmp_d_name, uid) != 0) {
+			(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+			sub_uid_close();
+#endif
+			fprintf (log_get_logfd(),
+			         _("%s: user %s is currently used by process %d\n"),
+			         log_get_progname(), name, pid);
+			return 1;
+		}
+
+		SNPRINTF(task_path, "/proc/%lu/task", (unsigned long) pid);
+		task_dir = opendir (task_path);
+		if (task_dir != NULL) {
+			while ((ent = readdir (task_dir)) != NULL) {
+				pid_t tid;
+				if (get_pid(ent->d_name, &tid) == -1) {
+					continue;
+				}
+				if (tid == pid) {
+					continue;
+				}
+				if (check_status (name, task_path+6, uid) != 0) {
+					(void) closedir (proc);
+					(void) closedir (task_dir);
+#ifdef ENABLE_SUBIDS
+					sub_uid_close();
+#endif
+					fprintf (log_get_logfd(),
+					         _("%s: user %s is currently used by process %d\n"),
+					         log_get_progname(), name, pid);
+					return 1;
+				}
+			}
+			(void) closedir (task_dir);
+		} else {
+			/* Ignore errors. This is just a best effort */
+		}
+	}
+
+	(void) closedir (proc);
+#ifdef ENABLE_SUBIDS
+	sub_uid_close();
+#endif				/* ENABLE_SUBIDS */
+	return 0;
+}
+#endif				/* __linux__ */
+
diff --git a/lib/utent.c b/lib/utent.c
deleted file mode 100644
index d5e6dae..0000000
--- a/lib/utent.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * SPDX-FileCopyrightText: 1993 - 1994, Julianne Frances Haugh
- * SPDX-FileCopyrightText: 1996 - 1998, Marek Michałkiewicz
- * SPDX-FileCopyrightText: 2005       , Tomasz Kłoczko
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <config.h>
-
-#ifndef	HAVE_GETUTENT
-
-#include "defines.h"
-#include <stdio.h>
-#include <fcntl.h>
-#include <utmp.h>
-
-#ifndef	lint
-static char rcsid[] = "$Id$";
-#endif
-
-static int utmp_fd = -1;
-static struct utmp utmp_buf;
-
-/*
- * setutent - open or rewind the utmp file
- */
-
-void setutent (void)
-{
-	if (utmp_fd == -1)
-		if ((utmp_fd = open (_UTMP_FILE, O_RDWR)) == -1)
-			utmp_fd = open (_UTMP_FILE, O_RDONLY);
-
-	if (utmp_fd != -1)
-		lseek (utmp_fd, (off_t) 0L, SEEK_SET);
-}
-
-/*
- * endutent - close the utmp file
- */
-
-void endutent (void)
-{
-	if (utmp_fd != -1)
-		close (utmp_fd);
-
-	utmp_fd = -1;
-}
-
-/*
- * getutent - get the next record from the utmp file
- */
-
-struct utmp *getutent (void)
-{
-	if (utmp_fd == -1)
-		setutent ();
-
-	if (utmp_fd == -1)
-		return 0;
-
-	if (read (utmp_fd, &utmp_buf, sizeof utmp_buf) != sizeof utmp_buf)
-		return 0;
-
-	return &utmp_buf;
-}
-#else
-extern int errno;		/* warning: ANSI C forbids an empty source file */
-#endif
diff --git a/lib/utmp.c b/lib/utmp.c
new file mode 100644
index 0000000..08e9b62
--- /dev/null
+++ b/lib/utmp.c
@@ -0,0 +1,434 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2001 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#include "defines.h"
+#include "prototypes.h"
+#include "getdef.h"
+
+#include <utmpx.h>
+#include <assert.h>
+#include <sys/param.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+#include "alloc.h"
+#include "sizeof.h"
+#include "string/strncpy.h"
+#include "string/strtcpy.h"
+#include "string/zustr2stp.h"
+
+#ident "$Id$"
+
+
+#define UTX_LINESIZE  NITEMS(memberof(struct utmpx, ut_line))
+
+
+/*
+ * is_my_tty -- determine if "tty" is the same TTY stdin is using
+ */
+static bool
+is_my_tty(const char tty[UTX_LINESIZE])
+{
+	char         full_tty[STRLEN("/dev/") + UTX_LINESIZE + 1];
+	/* tmptty shall be bigger than full_tty */
+	static char  tmptty[sizeof(full_tty) + 1];
+
+	full_tty[0] = '\0';
+	if (tty[0] != '/')
+		strcpy (full_tty, "/dev/");
+	strncat(full_tty, tty, UTX_LINESIZE);
+
+	if ('\0' == tmptty[0]) {
+		const char *tname = ttyname (STDIN_FILENO);
+		if (NULL != tname)
+			STRTCPY(tmptty, tname);
+	}
+
+	if ('\0' == tmptty[0]) {
+		(void) puts (_("Unable to determine your tty name."));
+		exit (EXIT_FAILURE);
+	}
+
+	return strcmp (full_tty, tmptty) == 0;
+}
+
+
+/*
+ * failtmp - update the cumulative failure log
+ *
+ *	failtmp updates the (struct utmpx) formatted failure log which
+ *	maintains a record of all login failures.
+ */
+static void
+failtmp(const char *username, const struct utmpx *failent)
+{
+	const char *ftmp;
+	int fd;
+
+	/*
+	 * Get the name of the failure file.  If no file has been defined
+	 * in login.defs, don't do this.
+	 */
+
+	ftmp = getdef_str ("FTMP_FILE");
+	if (NULL == ftmp) {
+		return;
+	}
+
+	/*
+	 * Open the file for append.  It must already exist for this
+	 * feature to be used.
+	 */
+
+	fd = open (ftmp, O_WRONLY | O_APPEND);
+	if (-1 == fd) {
+		if (errno != ENOENT) {
+			SYSLOG ((LOG_WARN,
+			        "Can't append failure of user %s to %s: %m",
+			        username, ftmp));
+		}
+		return;
+	}
+
+	/*
+	 * Append the new failure record and close the log file.
+	 */
+
+	if (write_full(fd, failent, sizeof *failent) == -1) {
+		goto err_write;
+	}
+
+	if (close (fd) != 0 && errno != EINTR) {
+		goto err_close;
+	}
+
+	return;
+
+err_write:
+	{
+		int saved_errno = errno;
+		(void) close (fd);
+		errno = saved_errno;
+	}
+err_close:
+	SYSLOG ((LOG_WARN,
+	         "Can't append failure of user %s to %s: %m",
+	         username, ftmp));
+}
+
+
+/*
+ * get_current_utmp - return the most probable utmp entry for the current
+ *                    session
+ *
+ *	The utmp file is scanned for an entry with the same process ID.
+ *	The line entered by the *getty / telnetd, etc. should also match
+ *	the current terminal.
+ *
+ *	When an entry is returned by get_current_utmp, and if the utmpx
+ *	structure has a ut_id field, this field should be used to update
+ *	the entry information.
+ *
+ *	Return NULL if no entries exist in utmp for the current process.
+ */
+static /*@null@*/ /*@only@*/struct utmpx *
+get_current_utmp(void)
+{
+	struct utmpx  *ut;
+	struct utmpx  *ret = NULL;
+
+	setutxent();
+
+	/* First, try to find a valid utmp entry for this process.  */
+	while ((ut = getutxent()) != NULL) {
+		if (   (ut->ut_pid == getpid ())
+		    && ('\0' != ut->ut_id[0])
+		    && (   (LOGIN_PROCESS == ut->ut_type)
+		        || (USER_PROCESS  == ut->ut_type))
+		    /* A process may have failed to close an entry
+		     * Check if this entry refers to the current tty */
+		    && is_my_tty(ut->ut_line))
+		{
+			break;
+		}
+	}
+
+	if (NULL != ut) {
+		ret = XMALLOC(1, struct utmpx);
+		memcpy (ret, ut, sizeof (*ret));
+	}
+
+	endutxent();
+
+	return ret;
+}
+
+
+int
+get_session_host(char **out)
+{
+	int           ret = 0;
+	struct utmpx  *ut;
+
+	ut = get_current_utmp();
+
+#if defined(HAVE_STRUCT_UTMPX_UT_HOST)
+	if ((ut != NULL) && (ut->ut_host[0] != '\0')) {
+		char  *hostname;
+
+		hostname = XMALLOC(sizeof(ut->ut_host) + 1, char);
+		ZUSTR2STP(hostname, ut->ut_host);
+		*out = hostname;
+		free (ut);
+	} else {
+		*out = NULL;
+		ret = -2;
+	}
+#else
+	*out = NULL;
+	ret = -2;
+#endif
+
+	return ret;
+}
+
+
+#if !defined(USE_PAM) && !defined(HAVE_UPDWTMPX)
+/*
+ * Some systems already have updwtmpx().  Others
+ * don't, so we re-implement these functions if necessary.
+ */
+static void
+updwtmpx(const char *filename, const struct utmpx *ut)
+{
+	int fd;
+
+	fd = open (filename, O_APPEND | O_WRONLY, 0);
+	if (fd >= 0) {
+		write_full(fd, ut, sizeof(*ut));
+		close (fd);
+	}
+}
+#endif
+
+
+/*
+ * prepare_utmp - prepare an utmp entry so that it can be logged in a
+ *                utmp/wtmp file.
+ *
+ *	It accepts an utmp entry in input (ut) to return an entry with
+ *	the right ut_id. This is typically an entry returned by
+ *	get_current_utmp
+ *	If ut is NULL, ut_id will be forged based on the line argument.
+ *
+ *	The ut_host field of the input structure may also be kept, and is
+ *	used to define the ut_addr/ut_addr_v6 fields. (if these fields
+ *	exist)
+ *
+ *	Other fields are discarded and filed with new values (if they
+ *	exist).
+ *
+ *	The returned structure shall be freed by the caller.
+ */
+static /*@only@*/struct utmpx *
+prepare_utmp(const char *name, const char *line, const char *host,
+             /*@null@*/const struct utmpx *ut)
+{
+	char            *hostname = NULL;
+	struct utmpx    *utent;
+	struct timeval  tv;
+
+	assert (NULL != name);
+	assert (NULL != line);
+
+
+
+	if (   (NULL != host)
+	    && ('\0' != host[0])) {
+		hostname = XMALLOC(strlen(host) + 1, char);
+		strcpy (hostname, host);
+#if defined(HAVE_STRUCT_UTMPX_UT_HOST)
+	} else if (   (NULL != ut)
+	           && ('\0' != ut->ut_host[0])) {
+		hostname = XMALLOC(NITEMS(ut->ut_host) + 1, char);
+		ZUSTR2STP(hostname, ut->ut_host);
+#endif
+	}
+
+	if (strncmp(line, "/dev/", 5) == 0) {
+		line += 5;
+	}
+
+
+	utent = XCALLOC(1, struct utmpx);
+
+
+	utent->ut_type = USER_PROCESS;
+	utent->ut_pid = getpid ();
+	STRNCPY(utent->ut_line, line);
+	if (NULL != ut) {
+		STRNCPY(utent->ut_id, ut->ut_id);
+	} else {
+		/* XXX - assumes /dev/tty?? */
+		STRNCPY(utent->ut_id, line + 3);
+	}
+#if defined(HAVE_STRUCT_UTMPX_UT_NAME)
+	STRNCPY(utent->ut_name, name);
+#endif
+	STRNCPY(utent->ut_user, name);
+	if (NULL != hostname) {
+		struct addrinfo *info = NULL;
+#if defined(HAVE_STRUCT_UTMPX_UT_HOST)
+		STRNCPY(utent->ut_host, hostname);
+#endif
+#if defined(HAVE_STRUCT_UTMPX_UT_SYSLEN)
+		utent->ut_syslen = MIN (strlen (hostname),
+		                        sizeof (utent->ut_host));
+#endif
+#if defined(HAVE_STRUCT_UTMPX_UT_ADDR) || defined(HAVE_STRUCT_UTMPX_UT_ADDR_V6)
+		if (getaddrinfo (hostname, NULL, NULL, &info) == 0) {
+			/* getaddrinfo might not be reliable.
+			 * Just try to log what may be useful.
+			 */
+			if (info->ai_family == AF_INET) {
+				struct sockaddr_in *sa =
+					(struct sockaddr_in *) info->ai_addr;
+# if defined(HAVE_STRUCT_UTMPX_UT_ADDR)
+				memcpy (&(utent->ut_addr),
+				        &(sa->sin_addr),
+				        MIN (sizeof (utent->ut_addr),
+				             sizeof (sa->sin_addr)));
+# endif
+# if defined(HAVE_STRUCT_UTMPX_UT_ADDR_V6)
+				memcpy (utent->ut_addr_v6,
+				        &(sa->sin_addr),
+				        MIN (sizeof (utent->ut_addr_v6),
+				             sizeof (sa->sin_addr)));
+			} else if (info->ai_family == AF_INET6) {
+				struct sockaddr_in6 *sa =
+					(struct sockaddr_in6 *) info->ai_addr;
+				memcpy (utent->ut_addr_v6,
+				        &(sa->sin6_addr),
+				        MIN (sizeof (utent->ut_addr_v6),
+				             sizeof (sa->sin6_addr)));
+# endif
+			}
+			freeaddrinfo (info);
+		}
+#endif
+		free (hostname);
+	}
+	/* ut_exit is only for DEAD_PROCESS */
+	utent->ut_session = getsid (0);
+	if (gettimeofday (&tv, NULL) == 0) {
+#if defined(HAVE_STRUCT_UTMPX_UT_TIME)
+		utent->ut_time = tv.tv_sec;
+#endif
+#if defined(HAVE_STRUCT_UTMPX_UT_XTIME)
+		utent->ut_xtime = tv.tv_usec;
+#endif
+		utent->ut_tv.tv_sec  = tv.tv_sec;
+		utent->ut_tv.tv_usec = tv.tv_usec;
+	}
+
+	return utent;
+}
+
+
+/*
+ * setutmp - Update an entry in utmp and log an entry in wtmp
+ *
+ *	Return 1 on failure and 0 on success.
+ */
+static int
+setutmp(struct utmpx *ut)
+{
+	int err = 0;
+
+	assert (NULL != ut);
+
+	setutxent();
+	if (pututxline(ut) == NULL) {
+		err = 1;
+	}
+	endutxent();
+
+#if !defined(USE_PAM)
+	/* This is done by pam_lastlog */
+	updwtmpx(_WTMP_FILE, ut);
+#endif
+
+	return err;
+}
+
+
+int
+update_utmp(const char *user, const char *tty, const char *host)
+{
+	struct utmpx  *utent, *ut;
+
+	utent = get_current_utmp ();
+	ut = prepare_utmp  (user, tty, host, utent);
+
+	(void) setutmp  (ut);	/* make entry in the utmp & wtmp files */
+
+	free(utent);
+	free(ut);
+
+	return 0;
+}
+
+
+void
+record_failure(const char *failent_user, const char *tty, const char *hostname)
+{
+	struct utmpx  *utent, *failent;
+
+	if (getdef_str ("FTMP_FILE") != NULL) {
+		utent = get_current_utmp ();
+		failent = prepare_utmp (failent_user, tty, hostname, utent);
+		failtmp (failent_user, failent);
+		free (utent);
+		free (failent);
+	}
+}
+
+
+unsigned long
+active_sessions_count(const char *name, unsigned long limit)
+{
+	struct utmpx   *ut;
+	unsigned long  count = 0;
+
+	setutxent();
+	while ((ut = getutxent()))
+	{
+		if (USER_PROCESS != ut->ut_type) {
+			continue;
+		}
+		if ('\0' == ut->ut_user[0]) {
+			continue;
+		}
+		if (strncmp (name, ut->ut_user, sizeof (ut->ut_user)) != 0) {
+			continue;
+		}
+		count++;
+		if (count > limit) {
+			break;
+		}
+	}
+	endutxent();
+
+	return count;
+}
diff --git a/lib/valid.c b/lib/valid.c
new file mode 100644
index 0000000..326635f
--- /dev/null
+++ b/lib/valid.c
@@ -0,0 +1,82 @@
+/*
+ * SPDX-FileCopyrightText: 1989 - 1993, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 1996 - 1999, Marek Michałkiewicz
+ * SPDX-FileCopyrightText: 2003 - 2005, Tomasz Kłoczko
+ * SPDX-FileCopyrightText: 2007 - 2008, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <sys/types.h>
+#include <stdio.h>
+#include "prototypes.h"
+#include "defines.h"
+#include <pwd.h>
+/*
+ * valid - compare encrypted passwords
+ *
+ *	Valid() compares the DES encrypted password from the password file
+ *	against the password which the user has entered after it has been
+ *	encrypted using the same salt as the original.  Entries which do
+ *	not have a password file entry have a NULL pw_name field and this
+ *	is used to indicate that a dummy salt must be used to encrypt the
+ *	password anyway.
+ */
+bool valid (const char *password, const struct passwd *ent)
+{
+	const char *encrypted;
+	/*@observer@*/const char *salt;
+
+	/*
+	 * Start with blank or empty password entries.  Always encrypt
+	 * a password if no such user exists.  Only if the ID exists and
+	 * the password is really empty do you return quickly.  This
+	 * routine is meant to waste CPU time.
+	 */
+
+	if ((NULL != ent->pw_name) && ('\0' == ent->pw_passwd[0])) {
+		if ('\0' == password[0]) {
+			return true;	/* user entered nothing */
+		} else {
+			return false;	/* user entered something! */
+		}
+	}
+
+	/*
+	 * If there is no entry then we need a salt to use.
+	 */
+
+	if ((NULL == ent->pw_name) || ('\0' == ent->pw_passwd[0])) {
+		salt = "xx";
+	} else {
+		salt = ent->pw_passwd;
+	}
+
+	/*
+	 * Now, perform the encryption using the salt from before on
+	 * the users input.  Since we always encrypt the string, it
+	 * should be very difficult to determine if the user exists by
+	 * looking at execution time.
+	 */
+
+	encrypted = pw_encrypt (password, salt);
+
+	/*
+	 * One last time we must deal with there being no password file
+	 * entry for the user.  We use the pw_name == NULL idiom to
+	 * cause non-existent users to not be validated.
+	 */
+
+	if (   (NULL != ent->pw_name)
+	    && (NULL != encrypted)
+	    && (strcmp (encrypted, ent->pw_passwd) == 0)) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
diff --git a/lib/write_full.c b/lib/write_full.c
new file mode 100644
index 0000000..4ef902c
--- /dev/null
+++ b/lib/write_full.c
@@ -0,0 +1,77 @@
+/*
+ * SPDX-FileCopyrightText: 2023, Christian Göttsche <cgzones@googlemail.com>
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "prototypes.h"
+
+
+/*
+ * SYNOPSIS
+ *	int write_full(int fd, const void *buf, size_t count);
+ *
+ * ARGUMENTS
+ *	fd	File descriptor.
+ *	buf	Source buffer to write(2) into 'fd'.
+ *	count	Size of 'buf'.
+ *
+ * DESCRIPTION
+ *	Write 'count' bytes from the buffer starting at 'buf' to the
+ *	file referred to by 'fd'.
+ *
+ *	This function is similar to write(2), except that it retries
+ *	in case of a short write.
+ *
+ *	Since this function either performs a full write, or fails, the
+ *	return value is simpler than for write(2).
+ *
+ * RETURN VALUE
+ *	0	On success.
+ *	-1	On error.
+ *
+ * ERRORS
+ *	See write(2).
+ *
+ * CAVEATS
+ *	This function can still perform partial writes: if the function
+ *	fails in the loop after one or more write(2) calls have
+ *	succeeded, it will report a failure, but some data may have been
+ *	written.  In such a case, it's the caller's responsibility to
+ *	make sure that the partial write is not problematic, and
+ *	remediate it if it is --maybe by trying to remove the file--.
+ */
+
+
+int
+write_full(int fd, const void *buf, size_t count)
+{
+	ssize_t              w;
+	const unsigned char  *p;
+
+	p = buf;
+
+	while (count > 0) {
+		w = write(fd, p, count);
+		if (w == -1) {
+			if (errno == EINTR)
+				continue;
+
+			return -1;
+		}
+
+		p += w;
+		count -= w;
+	}
+
+	return 0;
+}
diff --git a/lib/xgetXXbyYY.c b/lib/xgetXXbyYY.c
new file mode 100644
index 0000000..7d5e914
--- /dev/null
+++ b/lib/xgetXXbyYY.c
@@ -0,0 +1,118 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the name or name_r functions.
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "alloc.h"
+#include "prototypes.h"
+#include "shadowlog.h"
+
+#define XFUNCTION_NAME XPREFIX (FUNCTION_NAME)
+#define XPREFIX(name) XPREFIX1 (name)
+#define XPREFIX1(name) x##name
+#define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+#define STRINGIZE(name) STRINGIZE1 (name)
+#define STRINGIZE1(name) #name
+
+/*@null@*/ /*@only@*/LOOKUP_TYPE *XFUNCTION_NAME (ARG_TYPE ARG_NAME)
+{
+#if HAVE_FUNCTION_R
+	LOOKUP_TYPE *result=NULL;
+	char *buffer=NULL;
+	/* we have to start with something */
+	size_t length = 0x100;
+
+	result = MALLOC(1, LOOKUP_TYPE);
+	if (NULL == result) {
+		goto oom;
+	}
+
+	while (true) {
+		int status;
+		LOOKUP_TYPE *resbuf = NULL;
+		buffer = XREALLOC(buffer, length, char);
+		status = REENTRANT_NAME(ARG_NAME, result, buffer,
+		                        length, &resbuf);
+		if ((0 == status) && (resbuf == result)) {
+			/* Build a result structure that can be freed by
+			 * the shadow *_free functions. */
+			LOOKUP_TYPE *ret_result = DUP_FUNCTION(result);
+			if (NULL == ret_result) {
+				goto oom;
+			}
+			free(buffer);
+			free(result);
+			return ret_result;
+		}
+
+		if (ERANGE != status) {
+			break;
+		}
+
+		if (length == SIZE_MAX) {
+			break;
+		}
+
+		length = (length <= SIZE_MAX / 4) ? length * 4 : SIZE_MAX;
+	}
+
+	free(buffer);
+	free(result);
+	return NULL;
+
+#else /* !HAVE_FUNCTION_R */
+
+	/* No reentrant function.
+	 * Duplicate the structure to avoid other call to overwrite it.
+	 *
+	 * We should also restore the initial structure. But that would be
+	 * overkill.
+	 */
+	LOOKUP_TYPE *result = FUNCTION_NAME(ARG_NAME);
+
+	if (result) {
+		result = DUP_FUNCTION(result);
+		if (NULL == result) {
+			goto oom;
+		}
+	}
+
+	return result;
+#endif
+
+oom:
+	fprintf (log_get_logfd(), _("%s: out of memory\n"),
+		 "x" STRINGIZE(FUNCTION_NAME));
+	exit (13);
+}
+
diff --git a/lib/xgetgrgid.c b/lib/xgetgrgid.c
new file mode 100644
index 0000000..6419196
--- /dev/null
+++ b/lib/xgetgrgid.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the getgrgid or getgrgid_r functions.
+ */
+
+#include <config.h>
+
+#include "groupio.h"
+
+#define LOOKUP_TYPE	struct group
+#define FUNCTION_NAME	getgrgid
+#define ARG_TYPE	gid_t
+#define ARG_NAME	gid
+#define DUP_FUNCTION	__gr_dup
+#define HAVE_FUNCTION_R 1
+
+#include "xgetXXbyYY.c"
+
diff --git a/lib/xgetgrnam.c b/lib/xgetgrnam.c
new file mode 100644
index 0000000..35ad9ee
--- /dev/null
+++ b/lib/xgetgrnam.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the getgrnam or getgrnam_r functions.
+ */
+
+#include <config.h>
+
+#include "groupio.h"
+
+#define LOOKUP_TYPE	struct group
+#define FUNCTION_NAME	getgrnam
+#define ARG_TYPE	const char *
+#define ARG_NAME	name
+#define DUP_FUNCTION	__gr_dup
+#define HAVE_FUNCTION_R 1
+
+#include "xgetXXbyYY.c"
+
diff --git a/lib/xgetpwnam.c b/lib/xgetpwnam.c
new file mode 100644
index 0000000..4387e79
--- /dev/null
+++ b/lib/xgetpwnam.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the getpwnam or getpwnam_r functions.
+ */
+
+#include <config.h>
+
+#include "pwio.h"
+
+#define LOOKUP_TYPE	struct passwd
+#define FUNCTION_NAME	getpwnam
+#define ARG_TYPE	const char *
+#define ARG_NAME	name
+#define DUP_FUNCTION	__pw_dup
+#define HAVE_FUNCTION_R 1
+
+#include "xgetXXbyYY.c"
+
diff --git a/lib/xgetpwuid.c b/lib/xgetpwuid.c
new file mode 100644
index 0000000..d663a42
--- /dev/null
+++ b/lib/xgetpwuid.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the getpwuid or getpwuid_r functions.
+ */
+
+#include <config.h>
+
+#include "pwio.h"
+
+#define LOOKUP_TYPE	struct passwd
+#define FUNCTION_NAME	getpwuid
+#define ARG_TYPE	uid_t
+#define ARG_NAME	uid
+#define DUP_FUNCTION	__pw_dup
+#define HAVE_FUNCTION_R 1
+
+#include "xgetXXbyYY.c"
+
diff --git a/lib/xgetspnam.c b/lib/xgetspnam.c
new file mode 100644
index 0000000..ebda94b
--- /dev/null
+++ b/lib/xgetspnam.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2008 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the getspnam or getspnam_r functions.
+ */
+
+#include <config.h>
+
+#include "shadowio.h"
+
+#define LOOKUP_TYPE	struct spwd
+#define FUNCTION_NAME	getspnam
+#define ARG_TYPE	const char *
+#define ARG_NAME	name
+#define DUP_FUNCTION	__spw_dup
+#define HAVE_FUNCTION_R (defined HAVE_GETSPNAM_R)
+
+#include "xgetXXbyYY.c"
+
diff --git a/lib/xprefix_getpwnam.c b/lib/xprefix_getpwnam.c
new file mode 100644
index 0000000..cec0106
--- /dev/null
+++ b/lib/xprefix_getpwnam.c
@@ -0,0 +1,41 @@
+/*
+ * SPDX-FileCopyrightText: 2007 - 2009, Nicolas François
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/*
+ * According to the Linux-PAM documentation:
+ *
+ *  4.1. Care about standard library calls
+ *
+ *  In general, writers of authorization-granting applications should
+ *  assume that each module is likely to call any or all 'libc' functions.
+ *  For 'libc' functions that return pointers to static/dynamically
+ *  allocated structures (ie.  the library allocates the memory and the
+ *  user is not expected to 'free()' it) any module call to this function
+ *  is likely to corrupt a pointer previously obtained by the application.
+ *  The application programmer should either re-call such a 'libc'
+ *  function after a call to the Linux-PAM library, or copy the structure
+ *  contents to some safe area of memory before passing control to the
+ *  Linux-PAM library.
+ *
+ *  Two important function classes that fall into this category are
+ *  getpwnam(3) and syslog(3).
+ *
+ * This file provides wrapper to the prefix_getpwnam or prefix_getpwnam_r functions.
+ */
+
+#include <config.h>
+
+#include "pwio.h"
+
+#define LOOKUP_TYPE	struct passwd
+#define FUNCTION_NAME	prefix_getpwnam
+#define ARG_TYPE	const char *
+#define ARG_NAME	name
+#define DUP_FUNCTION	__pw_dup
+#define HAVE_FUNCTION_R HAVE_FGETPWENT_R
+
+#include "xgetXXbyYY.c"
+
diff --git a/lib/yesno.c b/lib/yesno.c
new file mode 100644
index 0000000..029cd81
--- /dev/null
+++ b/lib/yesno.c
@@ -0,0 +1,87 @@
+/*
+ * SPDX-FileCopyrightText: 1992 - 1994, Julianne Frances Haugh
+ * SPDX-FileCopyrightText: 2007 - 2008, Nicolas François
+ * SPDX-FileCopyrightText: 2023, Alejandro Colomar <alx@kernel.org>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <config.h>
+
+#ident "$Id$"
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "prototypes.h"
+
+
+/*
+ * Synopsis
+ *	bool yes_or_no(bool read_only);
+ *
+ * Arguments
+ *	read_only
+ *		In read-only mode, all questions are answered "no".  It
+ *		will print "No" to stdout.
+ *
+ * Description
+ *	After a yes/no question, this function gets the answer from the
+ *	user.
+ *
+ *	Calls to this function will normally be preceeded by a prompt on
+ *	stdout, so we should fflush(3).
+ *
+ * Return value
+ *	false	"no"
+ *	true	"yes"
+ *
+ * See also
+ *	rpmatch(3)
+ */
+
+
+#if !defined(HAVE_RPMATCH)
+static int rpmatch(const char *response);
+#endif
+
+
+bool
+yes_or_no(bool read_only)
+{
+	bool   ret;
+	char   *buf;
+	size_t size;
+
+	if (read_only) {
+		puts(_("No"));
+		return false;
+	}
+
+	fflush(stdout);
+
+	buf = NULL;
+	ret = false;
+	size = 0;
+	if (getline(&buf, &size, stdin) != -1)
+		ret = rpmatch(buf) == 1;
+
+	free(buf);
+	return ret;
+}
+
+
+#if !defined(HAVE_RPMATCH)
+static int
+rpmatch(const char *response)
+{
+	if (response[0] == 'y' || response[0] == 'Y')
+		return 1;
+
+	if (response[0] == 'n' || response[0] == 'n')
+		return 0;
+
+	return -1;
+}
+#endif