Adding upstream version 2.11.2.upstream/2.11.2 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 15:19:27 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-07 15:19:27 +0000
commit: e0023883c6d2e6745a19e4b48e186ed156c1fca8 (patch)
tree: 1a48b8056ec984385d0d862b683535d04d6ed215 /lib
parent: Initial commit. (diff)
download: man-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.tar.xz
man-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.zip
38 files changed, 6829 insertions, 0 deletions
diff --git a/lib/Makefile.am b/lib/Makefile.am
new file mode 100644
index 0000000..8623ea4
--- /dev/null
+++ b/lib/Makefile.am
@@ -0,0 +1,78 @@
+## Process this file with automake to produce Makefile.in
+##
+## Copyright (C) 1994, 1995 Graeme Wilford.
+## Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Colin Watson.
+##
+## This file is part of man-db.
+##
+## man-db 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 2 of the License, or
+## (at your option) any later version.
+##
+## man-db 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 man-db; if not, write to the Free Software Foundation,
+## Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
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+
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+	-I$(top_builddir)/gl/lib \
+	-DLOCALEDIR=\"$(localedir)\" \
+	$(libseccomp_CFLAGS)
+
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+	appendstr.c \
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+	cleanup.c \
+	cleanup.h \
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+	compression.h \
+	debug.c \
+	debug.h \
+	encodings.c \
+	encodings.h \
+	fatal.c \
+	fatal.h \
+	filenames.c \
+	filenames.h \
+	glcontainers.c \
+	glcontainers.h \
+	linelength.c \
+	linelength.h \
+	mp.h \
+	orderfiles.c \
+	orderfiles.h \
+	pathsearch.c \
+	pathsearch.h \
+	sandbox.c \
+	sandbox.h \
+	security.c \
+	security.h \
+	tempfile.c \
+	tempfile.h \
+	util.c \
+	util.h \
+	wordfnmatch.c \
+	wordfnmatch.h \
+	xregcomp.c \
+	xregcomp.h
+
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diff --git a/lib/Makefile.in b/lib/Makefile.in
new file mode 100644
index 0000000..c567af8
--- /dev/null
+++ b/lib/Makefile.in
@@ -0,0 +1,2210 @@
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+GL_GNULIB_MEMMEM = @GL_GNULIB_MEMMEM@
+GL_GNULIB_MEMPCPY = @GL_GNULIB_MEMPCPY@
+GL_GNULIB_MEMRCHR = @GL_GNULIB_MEMRCHR@
+GL_GNULIB_MKDIR = @GL_GNULIB_MKDIR@
+GL_GNULIB_MKDIRAT = @GL_GNULIB_MKDIRAT@
+GL_GNULIB_MKDTEMP = @GL_GNULIB_MKDTEMP@
+GL_GNULIB_MKFIFO = @GL_GNULIB_MKFIFO@
+GL_GNULIB_MKFIFOAT = @GL_GNULIB_MKFIFOAT@
+GL_GNULIB_MKNOD = @GL_GNULIB_MKNOD@
+GL_GNULIB_MKNODAT = @GL_GNULIB_MKNODAT@
+GL_GNULIB_MKOSTEMP = @GL_GNULIB_MKOSTEMP@
+GL_GNULIB_MKOSTEMPS = @GL_GNULIB_MKOSTEMPS@
+GL_GNULIB_MKSTEMP = @GL_GNULIB_MKSTEMP@
+GL_GNULIB_MKSTEMPS = @GL_GNULIB_MKSTEMPS@
+GL_GNULIB_MKTIME = @GL_GNULIB_MKTIME@
+GL_GNULIB_NANOSLEEP = @GL_GNULIB_NANOSLEEP@
+GL_GNULIB_NL_LANGINFO = @GL_GNULIB_NL_LANGINFO@
+GL_GNULIB_NONBLOCKING = @GL_GNULIB_NONBLOCKING@
+GL_GNULIB_OBSTACK_PRINTF = @GL_GNULIB_OBSTACK_PRINTF@
+GL_GNULIB_OBSTACK_PRINTF_POSIX = @GL_GNULIB_OBSTACK_PRINTF_POSIX@
+GL_GNULIB_OPEN = @GL_GNULIB_OPEN@
+GL_GNULIB_OPENAT = @GL_GNULIB_OPENAT@
+GL_GNULIB_OPENDIR = @GL_GNULIB_OPENDIR@
+GL_GNULIB_OVERRIDES_STRUCT_STAT = @GL_GNULIB_OVERRIDES_STRUCT_STAT@
+GL_GNULIB_PCLOSE = @GL_GNULIB_PCLOSE@
+GL_GNULIB_PERROR = @GL_GNULIB_PERROR@
+GL_GNULIB_PIPE = @GL_GNULIB_PIPE@
+GL_GNULIB_PIPE2 = @GL_GNULIB_PIPE2@
+GL_GNULIB_POPEN = @GL_GNULIB_POPEN@
+GL_GNULIB_POSIX_MEMALIGN = @GL_GNULIB_POSIX_MEMALIGN@
+GL_GNULIB_POSIX_OPENPT = @GL_GNULIB_POSIX_OPENPT@
+GL_GNULIB_PREAD = @GL_GNULIB_PREAD@
+GL_GNULIB_PRINTF = @GL_GNULIB_PRINTF@
+GL_GNULIB_PRINTF_POSIX = @GL_GNULIB_PRINTF_POSIX@
+GL_GNULIB_PSELECT = @GL_GNULIB_PSELECT@
+GL_GNULIB_PTHREAD_SIGMASK = @GL_GNULIB_PTHREAD_SIGMASK@
+GL_GNULIB_PTSNAME = @GL_GNULIB_PTSNAME@
+GL_GNULIB_PTSNAME_R = @GL_GNULIB_PTSNAME_R@
+GL_GNULIB_PUTC = @GL_GNULIB_PUTC@
+GL_GNULIB_PUTCHAR = @GL_GNULIB_PUTCHAR@
+GL_GNULIB_PUTENV = @GL_GNULIB_PUTENV@
+GL_GNULIB_PUTS = @GL_GNULIB_PUTS@
+GL_GNULIB_PWRITE = @GL_GNULIB_PWRITE@
+GL_GNULIB_QSORT_R = @GL_GNULIB_QSORT_R@
+GL_GNULIB_RAISE = @GL_GNULIB_RAISE@
+GL_GNULIB_RANDOM = @GL_GNULIB_RANDOM@
+GL_GNULIB_RANDOM_R = @GL_GNULIB_RANDOM_R@
+GL_GNULIB_RAWMEMCHR = @GL_GNULIB_RAWMEMCHR@
+GL_GNULIB_READ = @GL_GNULIB_READ@
+GL_GNULIB_READDIR = @GL_GNULIB_READDIR@
+GL_GNULIB_READLINK = @GL_GNULIB_READLINK@
+GL_GNULIB_READLINKAT = @GL_GNULIB_READLINKAT@
+GL_GNULIB_REALLOCARRAY = @GL_GNULIB_REALLOCARRAY@
+GL_GNULIB_REALLOC_GNU = @GL_GNULIB_REALLOC_GNU@
+GL_GNULIB_REALLOC_POSIX = @GL_GNULIB_REALLOC_POSIX@
+GL_GNULIB_REALPATH = @GL_GNULIB_REALPATH@
+GL_GNULIB_RECV = @GL_GNULIB_RECV@
+GL_GNULIB_RECVFROM = @GL_GNULIB_RECVFROM@
+GL_GNULIB_REMOVE = @GL_GNULIB_REMOVE@
+GL_GNULIB_RENAME = @GL_GNULIB_RENAME@
+GL_GNULIB_RENAMEAT = @GL_GNULIB_RENAMEAT@
+GL_GNULIB_REWINDDIR = @GL_GNULIB_REWINDDIR@
+GL_GNULIB_RMDIR = @GL_GNULIB_RMDIR@
+GL_GNULIB_RPMATCH = @GL_GNULIB_RPMATCH@
+GL_GNULIB_SCANDIR = @GL_GNULIB_SCANDIR@
+GL_GNULIB_SCANF = @GL_GNULIB_SCANF@
+GL_GNULIB_SECURE_GETENV = @GL_GNULIB_SECURE_GETENV@
+GL_GNULIB_SELECT = @GL_GNULIB_SELECT@
+GL_GNULIB_SEND = @GL_GNULIB_SEND@
+GL_GNULIB_SENDTO = @GL_GNULIB_SENDTO@
+GL_GNULIB_SETENV = @GL_GNULIB_SETENV@
+GL_GNULIB_SETHOSTNAME = @GL_GNULIB_SETHOSTNAME@
+GL_GNULIB_SETLOCALE = @GL_GNULIB_SETLOCALE@
+GL_GNULIB_SETLOCALE_NULL = @GL_GNULIB_SETLOCALE_NULL@
+GL_GNULIB_SETSOCKOPT = @GL_GNULIB_SETSOCKOPT@
+GL_GNULIB_SHUTDOWN = @GL_GNULIB_SHUTDOWN@
+GL_GNULIB_SIGABBREV_NP = @GL_GNULIB_SIGABBREV_NP@
+GL_GNULIB_SIGACTION = @GL_GNULIB_SIGACTION@
+GL_GNULIB_SIGDESCR_NP = @GL_GNULIB_SIGDESCR_NP@
+GL_GNULIB_SIGNAL_H_SIGPIPE = @GL_GNULIB_SIGNAL_H_SIGPIPE@
+GL_GNULIB_SIGPROCMASK = @GL_GNULIB_SIGPROCMASK@
+GL_GNULIB_SLEEP = @GL_GNULIB_SLEEP@
+GL_GNULIB_SNPRINTF = @GL_GNULIB_SNPRINTF@
+GL_GNULIB_SOCKET = @GL_GNULIB_SOCKET@
+GL_GNULIB_SPRINTF_POSIX = @GL_GNULIB_SPRINTF_POSIX@
+GL_GNULIB_STAT = @GL_GNULIB_STAT@
+GL_GNULIB_STDIO_H_NONBLOCKING = @GL_GNULIB_STDIO_H_NONBLOCKING@
+GL_GNULIB_STDIO_H_SIGPIPE = @GL_GNULIB_STDIO_H_SIGPIPE@
+GL_GNULIB_STPCPY = @GL_GNULIB_STPCPY@
+GL_GNULIB_STPNCPY = @GL_GNULIB_STPNCPY@
+GL_GNULIB_STRCASESTR = @GL_GNULIB_STRCASESTR@
+GL_GNULIB_STRCHRNUL = @GL_GNULIB_STRCHRNUL@
+GL_GNULIB_STRDUP = @GL_GNULIB_STRDUP@
+GL_GNULIB_STRERROR = @GL_GNULIB_STRERROR@
+GL_GNULIB_STRERRORNAME_NP = @GL_GNULIB_STRERRORNAME_NP@
+GL_GNULIB_STRERROR_R = @GL_GNULIB_STRERROR_R@
+GL_GNULIB_STRFTIME = @GL_GNULIB_STRFTIME@
+GL_GNULIB_STRNCAT = @GL_GNULIB_STRNCAT@
+GL_GNULIB_STRNDUP = @GL_GNULIB_STRNDUP@
+GL_GNULIB_STRNLEN = @GL_GNULIB_STRNLEN@
+GL_GNULIB_STRPBRK = @GL_GNULIB_STRPBRK@
+GL_GNULIB_STRPTIME = @GL_GNULIB_STRPTIME@
+GL_GNULIB_STRSEP = @GL_GNULIB_STRSEP@
+GL_GNULIB_STRSIGNAL = @GL_GNULIB_STRSIGNAL@
+GL_GNULIB_STRSTR = @GL_GNULIB_STRSTR@
+GL_GNULIB_STRTOD = @GL_GNULIB_STRTOD@
+GL_GNULIB_STRTOIMAX = @GL_GNULIB_STRTOIMAX@
+GL_GNULIB_STRTOK_R = @GL_GNULIB_STRTOK_R@
+GL_GNULIB_STRTOL = @GL_GNULIB_STRTOL@
+GL_GNULIB_STRTOLD = @GL_GNULIB_STRTOLD@
+GL_GNULIB_STRTOLL = @GL_GNULIB_STRTOLL@
+GL_GNULIB_STRTOUL = @GL_GNULIB_STRTOUL@
+GL_GNULIB_STRTOULL = @GL_GNULIB_STRTOULL@
+GL_GNULIB_STRTOUMAX = @GL_GNULIB_STRTOUMAX@
+GL_GNULIB_STRVERSCMP = @GL_GNULIB_STRVERSCMP@
+GL_GNULIB_SYMLINK = @GL_GNULIB_SYMLINK@
+GL_GNULIB_SYMLINKAT = @GL_GNULIB_SYMLINKAT@
+GL_GNULIB_SYSTEM_POSIX = @GL_GNULIB_SYSTEM_POSIX@
+GL_GNULIB_TCGETSID = @GL_GNULIB_TCGETSID@
+GL_GNULIB_TIMEGM = @GL_GNULIB_TIMEGM@
+GL_GNULIB_TIMESPEC_GET = @GL_GNULIB_TIMESPEC_GET@
+GL_GNULIB_TIMESPEC_GETRES = @GL_GNULIB_TIMESPEC_GETRES@
+GL_GNULIB_TIME_R = @GL_GNULIB_TIME_R@
+GL_GNULIB_TIME_RZ = @GL_GNULIB_TIME_RZ@
+GL_GNULIB_TMPFILE = @GL_GNULIB_TMPFILE@
+GL_GNULIB_TOWCTRANS = @GL_GNULIB_TOWCTRANS@
+GL_GNULIB_TRUNCATE = @GL_GNULIB_TRUNCATE@
+GL_GNULIB_TTYNAME_R = @GL_GNULIB_TTYNAME_R@
+GL_GNULIB_TZSET = @GL_GNULIB_TZSET@
+GL_GNULIB_UNISTD_H_GETOPT = @GL_GNULIB_UNISTD_H_GETOPT@
+GL_GNULIB_UNISTD_H_NONBLOCKING = @GL_GNULIB_UNISTD_H_NONBLOCKING@
+GL_GNULIB_UNISTD_H_SIGPIPE = @GL_GNULIB_UNISTD_H_SIGPIPE@
+GL_GNULIB_UNLINK = @GL_GNULIB_UNLINK@
+GL_GNULIB_UNLINKAT = @GL_GNULIB_UNLINKAT@
+GL_GNULIB_UNLOCKPT = @GL_GNULIB_UNLOCKPT@
+GL_GNULIB_UNSETENV = @GL_GNULIB_UNSETENV@
+GL_GNULIB_USLEEP = @GL_GNULIB_USLEEP@
+GL_GNULIB_UTIME = @GL_GNULIB_UTIME@
+GL_GNULIB_UTIMENSAT = @GL_GNULIB_UTIMENSAT@
+GL_GNULIB_VASPRINTF = @GL_GNULIB_VASPRINTF@
+GL_GNULIB_VDPRINTF = @GL_GNULIB_VDPRINTF@
+GL_GNULIB_VFPRINTF = @GL_GNULIB_VFPRINTF@
+GL_GNULIB_VFPRINTF_POSIX = @GL_GNULIB_VFPRINTF_POSIX@
+GL_GNULIB_VFSCANF = @GL_GNULIB_VFSCANF@
+GL_GNULIB_VPRINTF = @GL_GNULIB_VPRINTF@
+GL_GNULIB_VPRINTF_POSIX = @GL_GNULIB_VPRINTF_POSIX@
+GL_GNULIB_VSCANF = @GL_GNULIB_VSCANF@
+GL_GNULIB_VSNPRINTF = @GL_GNULIB_VSNPRINTF@
+GL_GNULIB_VSPRINTF_POSIX = @GL_GNULIB_VSPRINTF_POSIX@
+GL_GNULIB_WCPCPY = @GL_GNULIB_WCPCPY@
+GL_GNULIB_WCPNCPY = @GL_GNULIB_WCPNCPY@
+GL_GNULIB_WCRTOMB = @GL_GNULIB_WCRTOMB@
+GL_GNULIB_WCSCASECMP = @GL_GNULIB_WCSCASECMP@
+GL_GNULIB_WCSCAT = @GL_GNULIB_WCSCAT@
+GL_GNULIB_WCSCHR = @GL_GNULIB_WCSCHR@
+GL_GNULIB_WCSCMP = @GL_GNULIB_WCSCMP@
+GL_GNULIB_WCSCOLL = @GL_GNULIB_WCSCOLL@
+GL_GNULIB_WCSCPY = @GL_GNULIB_WCSCPY@
+GL_GNULIB_WCSCSPN = @GL_GNULIB_WCSCSPN@
+GL_GNULIB_WCSDUP = @GL_GNULIB_WCSDUP@
+GL_GNULIB_WCSFTIME = @GL_GNULIB_WCSFTIME@
+GL_GNULIB_WCSLEN = @GL_GNULIB_WCSLEN@
+GL_GNULIB_WCSNCASECMP = @GL_GNULIB_WCSNCASECMP@
+GL_GNULIB_WCSNCAT = @GL_GNULIB_WCSNCAT@
+GL_GNULIB_WCSNCMP = @GL_GNULIB_WCSNCMP@
+GL_GNULIB_WCSNCPY = @GL_GNULIB_WCSNCPY@
+GL_GNULIB_WCSNLEN = @GL_GNULIB_WCSNLEN@
+GL_GNULIB_WCSNRTOMBS = @GL_GNULIB_WCSNRTOMBS@
+GL_GNULIB_WCSPBRK = @GL_GNULIB_WCSPBRK@
+GL_GNULIB_WCSRCHR = @GL_GNULIB_WCSRCHR@
+GL_GNULIB_WCSRTOMBS = @GL_GNULIB_WCSRTOMBS@
+GL_GNULIB_WCSSPN = @GL_GNULIB_WCSSPN@
+GL_GNULIB_WCSSTR = @GL_GNULIB_WCSSTR@
+GL_GNULIB_WCSTOK = @GL_GNULIB_WCSTOK@
+GL_GNULIB_WCSWIDTH = @GL_GNULIB_WCSWIDTH@
+GL_GNULIB_WCSXFRM = @GL_GNULIB_WCSXFRM@
+GL_GNULIB_WCTOB = @GL_GNULIB_WCTOB@
+GL_GNULIB_WCTOMB = @GL_GNULIB_WCTOMB@
+GL_GNULIB_WCTRANS = @GL_GNULIB_WCTRANS@
+GL_GNULIB_WCTYPE = @GL_GNULIB_WCTYPE@
+GL_GNULIB_WCWIDTH = @GL_GNULIB_WCWIDTH@
+GL_GNULIB_WMEMCHR = @GL_GNULIB_WMEMCHR@
+GL_GNULIB_WMEMCMP = @GL_GNULIB_WMEMCMP@
+GL_GNULIB_WMEMCPY = @GL_GNULIB_WMEMCPY@
+GL_GNULIB_WMEMMOVE = @GL_GNULIB_WMEMMOVE@
+GL_GNULIB_WMEMPCPY = @GL_GNULIB_WMEMPCPY@
+GL_GNULIB_WMEMSET = @GL_GNULIB_WMEMSET@
+GL_GNULIB_WRITE = @GL_GNULIB_WRITE@
+GL_GNULIB__EXIT = @GL_GNULIB__EXIT@
+GMSGFMT = @GMSGFMT@
+GMSGFMT_015 = @GMSGFMT_015@
+GNULIBHEADERS_OVERRIDE_WINT_T = @GNULIBHEADERS_OVERRIDE_WINT_T@
+GNULIB_GETTIMEOFDAY = @GNULIB_GETTIMEOFDAY@
+GREP = @GREP@
+HAVE_ACCEPT4 = @HAVE_ACCEPT4@
+HAVE_ALIGNED_ALLOC = @HAVE_ALIGNED_ALLOC@
+HAVE_ALLOCA_H = @HAVE_ALLOCA_H@
+HAVE_ALPHASORT = @HAVE_ALPHASORT@
+HAVE_ATOLL = @HAVE_ATOLL@
+HAVE_BTOWC = @HAVE_BTOWC@
+HAVE_C99_STDINT_H = @HAVE_C99_STDINT_H@
+HAVE_CANONICALIZE_FILE_NAME = @HAVE_CANONICALIZE_FILE_NAME@
+HAVE_CHOWN = @HAVE_CHOWN@
+HAVE_CLOSEDIR = @HAVE_CLOSEDIR@
+HAVE_COPY_FILE_RANGE = @HAVE_COPY_FILE_RANGE@
+HAVE_CRTDEFS_H = @HAVE_CRTDEFS_H@
+HAVE_DECL_DIRFD = @HAVE_DECL_DIRFD@
+HAVE_DECL_ECVT = @HAVE_DECL_ECVT@
+HAVE_DECL_ENVIRON = @HAVE_DECL_ENVIRON@
+HAVE_DECL_EXECVPE = @HAVE_DECL_EXECVPE@
+HAVE_DECL_FCHDIR = @HAVE_DECL_FCHDIR@
+HAVE_DECL_FCLOSEALL = @HAVE_DECL_FCLOSEALL@
+HAVE_DECL_FCVT = @HAVE_DECL_FCVT@
+HAVE_DECL_FDATASYNC = @HAVE_DECL_FDATASYNC@
+HAVE_DECL_FDOPENDIR = @HAVE_DECL_FDOPENDIR@
+HAVE_DECL_FPURGE = @HAVE_DECL_FPURGE@
+HAVE_DECL_FSEEKO = @HAVE_DECL_FSEEKO@
+HAVE_DECL_FTELLO = @HAVE_DECL_FTELLO@
+HAVE_DECL_GCVT = @HAVE_DECL_GCVT@
+HAVE_DECL_GETDELIM = @HAVE_DECL_GETDELIM@
+HAVE_DECL_GETDOMAINNAME = @HAVE_DECL_GETDOMAINNAME@
+HAVE_DECL_GETLINE = @HAVE_DECL_GETLINE@
+HAVE_DECL_GETLOADAVG = @HAVE_DECL_GETLOADAVG@
+HAVE_DECL_GETLOGIN = @HAVE_DECL_GETLOGIN@
+HAVE_DECL_GETLOGIN_R = @HAVE_DECL_GETLOGIN_R@
+HAVE_DECL_GETPAGESIZE = @HAVE_DECL_GETPAGESIZE@
+HAVE_DECL_GETUSERSHELL = @HAVE_DECL_GETUSERSHELL@
+HAVE_DECL_IMAXABS = @HAVE_DECL_IMAXABS@
+HAVE_DECL_IMAXDIV = @HAVE_DECL_IMAXDIV@
+HAVE_DECL_INITSTATE = @HAVE_DECL_INITSTATE@
+HAVE_DECL_LOCALTIME_R = @HAVE_DECL_LOCALTIME_R@
+HAVE_DECL_MEMMEM = @HAVE_DECL_MEMMEM@
+HAVE_DECL_MEMRCHR = @HAVE_DECL_MEMRCHR@
+HAVE_DECL_OBSTACK_PRINTF = @HAVE_DECL_OBSTACK_PRINTF@
+HAVE_DECL_SETENV = @HAVE_DECL_SETENV@
+HAVE_DECL_SETHOSTNAME = @HAVE_DECL_SETHOSTNAME@
+HAVE_DECL_SETSTATE = @HAVE_DECL_SETSTATE@
+HAVE_DECL_SNPRINTF = @HAVE_DECL_SNPRINTF@
+HAVE_DECL_STRDUP = @HAVE_DECL_STRDUP@
+HAVE_DECL_STRERROR_R = @HAVE_DECL_STRERROR_R@
+HAVE_DECL_STRNCASECMP = @HAVE_DECL_STRNCASECMP@
+HAVE_DECL_STRNDUP = @HAVE_DECL_STRNDUP@
+HAVE_DECL_STRNLEN = @HAVE_DECL_STRNLEN@
+HAVE_DECL_STRSIGNAL = @HAVE_DECL_STRSIGNAL@
+HAVE_DECL_STRTOIMAX = @HAVE_DECL_STRTOIMAX@
+HAVE_DECL_STRTOK_R = @HAVE_DECL_STRTOK_R@
+HAVE_DECL_STRTOUMAX = @HAVE_DECL_STRTOUMAX@
+HAVE_DECL_TCGETSID = @HAVE_DECL_TCGETSID@
+HAVE_DECL_TRUNCATE = @HAVE_DECL_TRUNCATE@
+HAVE_DECL_TTYNAME_R = @HAVE_DECL_TTYNAME_R@
+HAVE_DECL_UNSETENV = @HAVE_DECL_UNSETENV@
+HAVE_DECL_VSNPRINTF = @HAVE_DECL_VSNPRINTF@
+HAVE_DECL_WCSDUP = @HAVE_DECL_WCSDUP@
+HAVE_DECL_WCTOB = @HAVE_DECL_WCTOB@
+HAVE_DECL_WCWIDTH = @HAVE_DECL_WCWIDTH@
+HAVE_DIRENT_H = @HAVE_DIRENT_H@
+HAVE_DPRINTF = @HAVE_DPRINTF@
+HAVE_DUP3 = @HAVE_DUP3@
+HAVE_DUPLOCALE = @HAVE_DUPLOCALE@
+HAVE_EUIDACCESS = @HAVE_EUIDACCESS@
+HAVE_EXECVPE = @HAVE_EXECVPE@
+HAVE_EXPLICIT_BZERO = @HAVE_EXPLICIT_BZERO@
+HAVE_FACCESSAT = @HAVE_FACCESSAT@
+HAVE_FCHDIR = @HAVE_FCHDIR@
+HAVE_FCHMODAT = @HAVE_FCHMODAT@
+HAVE_FCHOWNAT = @HAVE_FCHOWNAT@
+HAVE_FCNTL = @HAVE_FCNTL@
+HAVE_FDATASYNC = @HAVE_FDATASYNC@
+HAVE_FDOPENDIR = @HAVE_FDOPENDIR@
+HAVE_FEATURES_H = @HAVE_FEATURES_H@
+HAVE_FFS = @HAVE_FFS@
+HAVE_FFSL = @HAVE_FFSL@
+HAVE_FFSLL = @HAVE_FFSLL@
+HAVE_FLOCK = @HAVE_FLOCK@
+HAVE_FNMATCH = @HAVE_FNMATCH@
+HAVE_FNMATCH_H = @HAVE_FNMATCH_H@
+HAVE_FREELOCALE = @HAVE_FREELOCALE@
+HAVE_FSEEKO = @HAVE_FSEEKO@
+HAVE_FSTATAT = @HAVE_FSTATAT@
+HAVE_FSYNC = @HAVE_FSYNC@
+HAVE_FTELLO = @HAVE_FTELLO@
+HAVE_FTRUNCATE = @HAVE_FTRUNCATE@
+HAVE_FUTIMENS = @HAVE_FUTIMENS@
+HAVE_GETDTABLESIZE = @HAVE_GETDTABLESIZE@
+HAVE_GETENTROPY = @HAVE_GETENTROPY@
+HAVE_GETGROUPS = @HAVE_GETGROUPS@
+HAVE_GETHOSTNAME = @HAVE_GETHOSTNAME@
+HAVE_GETLOGIN = @HAVE_GETLOGIN@
+HAVE_GETOPT_H = @HAVE_GETOPT_H@
+HAVE_GETPAGESIZE = @HAVE_GETPAGESIZE@
+HAVE_GETPASS = @HAVE_GETPASS@
+HAVE_GETRANDOM = @HAVE_GETRANDOM@
+HAVE_GETSUBOPT = @HAVE_GETSUBOPT@
+HAVE_GETTIMEOFDAY = @HAVE_GETTIMEOFDAY@
+HAVE_GETUMASK = @HAVE_GETUMASK@
+HAVE_GLOB = @HAVE_GLOB@
+HAVE_GLOB_H = @HAVE_GLOB_H@
+HAVE_GLOB_PATTERN_P = @HAVE_GLOB_PATTERN_P@
+HAVE_GRANTPT = @HAVE_GRANTPT@
+HAVE_GROUP_MEMBER = @HAVE_GROUP_MEMBER@
+HAVE_IMAXDIV_T = @HAVE_IMAXDIV_T@
+HAVE_INITSTATE = @HAVE_INITSTATE@
+HAVE_INTTYPES_H = @HAVE_INTTYPES_H@
+HAVE_ISBLANK = @HAVE_ISBLANK@
+HAVE_ISWBLANK = @HAVE_ISWBLANK@
+HAVE_ISWCNTRL = @HAVE_ISWCNTRL@
+HAVE_LANGINFO_ALTMON = @HAVE_LANGINFO_ALTMON@
+HAVE_LANGINFO_CODESET = @HAVE_LANGINFO_CODESET@
+HAVE_LANGINFO_ERA = @HAVE_LANGINFO_ERA@
+HAVE_LANGINFO_H = @HAVE_LANGINFO_H@
+HAVE_LANGINFO_T_FMT_AMPM = @HAVE_LANGINFO_T_FMT_AMPM@
+HAVE_LANGINFO_YESEXPR = @HAVE_LANGINFO_YESEXPR@
+HAVE_LCHMOD = @HAVE_LCHMOD@
+HAVE_LCHOWN = @HAVE_LCHOWN@
+HAVE_LINK = @HAVE_LINK@
+HAVE_LINKAT = @HAVE_LINKAT@
+HAVE_LSTAT = @HAVE_LSTAT@
+HAVE_MAX_ALIGN_T = @HAVE_MAX_ALIGN_T@
+HAVE_MBRLEN = @HAVE_MBRLEN@
+HAVE_MBRTOWC = @HAVE_MBRTOWC@
+HAVE_MBSINIT = @HAVE_MBSINIT@
+HAVE_MBSLEN = @HAVE_MBSLEN@
+HAVE_MBSNRTOWCS = @HAVE_MBSNRTOWCS@
+HAVE_MBSRTOWCS = @HAVE_MBSRTOWCS@
+HAVE_MBTOWC = @HAVE_MBTOWC@
+HAVE_MEMPCPY = @HAVE_MEMPCPY@
+HAVE_MKDIRAT = @HAVE_MKDIRAT@
+HAVE_MKDTEMP = @HAVE_MKDTEMP@
+HAVE_MKFIFO = @HAVE_MKFIFO@
+HAVE_MKFIFOAT = @HAVE_MKFIFOAT@
+HAVE_MKNOD = @HAVE_MKNOD@
+HAVE_MKNODAT = @HAVE_MKNODAT@
+HAVE_MKOSTEMP = @HAVE_MKOSTEMP@
+HAVE_MKOSTEMPS = @HAVE_MKOSTEMPS@
+HAVE_MKSTEMP = @HAVE_MKSTEMP@
+HAVE_MKSTEMPS = @HAVE_MKSTEMPS@
+HAVE_MSVC_INVALID_PARAMETER_HANDLER = @HAVE_MSVC_INVALID_PARAMETER_HANDLER@
+HAVE_NANOSLEEP = @HAVE_NANOSLEEP@
+HAVE_NEWLOCALE = @HAVE_NEWLOCALE@
+HAVE_NL_LANGINFO = @HAVE_NL_LANGINFO@
+HAVE_OPENAT = @HAVE_OPENAT@
+HAVE_OPENDIR = @HAVE_OPENDIR@
+HAVE_OS_H = @HAVE_OS_H@
+HAVE_PCLOSE = @HAVE_PCLOSE@
+HAVE_PIPE = @HAVE_PIPE@
+HAVE_PIPE2 = @HAVE_PIPE2@
+HAVE_POPEN = @HAVE_POPEN@
+HAVE_POSIX_MEMALIGN = @HAVE_POSIX_MEMALIGN@
+HAVE_POSIX_OPENPT = @HAVE_POSIX_OPENPT@
+HAVE_POSIX_SIGNALBLOCKING = @HAVE_POSIX_SIGNALBLOCKING@
+HAVE_PREAD = @HAVE_PREAD@
+HAVE_PSELECT = @HAVE_PSELECT@
+HAVE_PTHREAD_SIGMASK = @HAVE_PTHREAD_SIGMASK@
+HAVE_PTSNAME = @HAVE_PTSNAME@
+HAVE_PTSNAME_R = @HAVE_PTSNAME_R@
+HAVE_PWRITE = @HAVE_PWRITE@
+HAVE_QSORT_R = @HAVE_QSORT_R@
+HAVE_RAISE = @HAVE_RAISE@
+HAVE_RANDOM = @HAVE_RANDOM@
+HAVE_RANDOM_H = @HAVE_RANDOM_H@
+HAVE_RANDOM_R = @HAVE_RANDOM_R@
+HAVE_RAWMEMCHR = @HAVE_RAWMEMCHR@
+HAVE_READDIR = @HAVE_READDIR@
+HAVE_READLINK = @HAVE_READLINK@
+HAVE_READLINKAT = @HAVE_READLINKAT@
+HAVE_REALLOCARRAY = @HAVE_REALLOCARRAY@
+HAVE_REALPATH = @HAVE_REALPATH@
+HAVE_RENAMEAT = @HAVE_RENAMEAT@
+HAVE_REWINDDIR = @HAVE_REWINDDIR@
+HAVE_RPMATCH = @HAVE_RPMATCH@
+HAVE_SA_FAMILY_T = @HAVE_SA_FAMILY_T@
+HAVE_SCANDIR = @HAVE_SCANDIR@
+HAVE_SECURE_GETENV = @HAVE_SECURE_GETENV@
+HAVE_SETENV = @HAVE_SETENV@
+HAVE_SETHOSTNAME = @HAVE_SETHOSTNAME@
+HAVE_SETSTATE = @HAVE_SETSTATE@
+HAVE_SIGABBREV_NP = @HAVE_SIGABBREV_NP@
+HAVE_SIGACTION = @HAVE_SIGACTION@
+HAVE_SIGDESCR_NP = @HAVE_SIGDESCR_NP@
+HAVE_SIGHANDLER_T = @HAVE_SIGHANDLER_T@
+HAVE_SIGINFO_T = @HAVE_SIGINFO_T@
+HAVE_SIGNED_SIG_ATOMIC_T = @HAVE_SIGNED_SIG_ATOMIC_T@
+HAVE_SIGNED_WCHAR_T = @HAVE_SIGNED_WCHAR_T@
+HAVE_SIGNED_WINT_T = @HAVE_SIGNED_WINT_T@
+HAVE_SIGSET_T = @HAVE_SIGSET_T@
+HAVE_SLEEP = @HAVE_SLEEP@
+HAVE_STDINT_H = @HAVE_STDINT_H@
+HAVE_STPCPY = @HAVE_STPCPY@
+HAVE_STPNCPY = @HAVE_STPNCPY@
+HAVE_STRCASECMP = @HAVE_STRCASECMP@
+HAVE_STRCASESTR = @HAVE_STRCASESTR@
+HAVE_STRCHRNUL = @HAVE_STRCHRNUL@
+HAVE_STRERRORNAME_NP = @HAVE_STRERRORNAME_NP@
+HAVE_STRINGS_H = @HAVE_STRINGS_H@
+HAVE_STRPBRK = @HAVE_STRPBRK@
+HAVE_STRPTIME = @HAVE_STRPTIME@
+HAVE_STRSEP = @HAVE_STRSEP@
+HAVE_STRTOD = @HAVE_STRTOD@
+HAVE_STRTOL = @HAVE_STRTOL@
+HAVE_STRTOLD = @HAVE_STRTOLD@
+HAVE_STRTOLL = @HAVE_STRTOLL@
+HAVE_STRTOUL = @HAVE_STRTOUL@
+HAVE_STRTOULL = @HAVE_STRTOULL@
+HAVE_STRUCT_RANDOM_DATA = @HAVE_STRUCT_RANDOM_DATA@
+HAVE_STRUCT_SIGACTION_SA_SIGACTION = @HAVE_STRUCT_SIGACTION_SA_SIGACTION@
+HAVE_STRUCT_SOCKADDR_STORAGE = @HAVE_STRUCT_SOCKADDR_STORAGE@
+HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY = @HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY@
+HAVE_STRUCT_TIMEVAL = @HAVE_STRUCT_TIMEVAL@
+HAVE_STRVERSCMP = @HAVE_STRVERSCMP@
+HAVE_SYMLINK = @HAVE_SYMLINK@
+HAVE_SYMLINKAT = @HAVE_SYMLINKAT@
+HAVE_SYSEXITS_H = @HAVE_SYSEXITS_H@
+HAVE_SYS_BITYPES_H = @HAVE_SYS_BITYPES_H@
+HAVE_SYS_CDEFS_H = @HAVE_SYS_CDEFS_H@
+HAVE_SYS_FILE_H = @HAVE_SYS_FILE_H@
+HAVE_SYS_INTTYPES_H = @HAVE_SYS_INTTYPES_H@
+HAVE_SYS_IOCTL_H = @HAVE_SYS_IOCTL_H@
+HAVE_SYS_LOADAVG_H = @HAVE_SYS_LOADAVG_H@
+HAVE_SYS_PARAM_H = @HAVE_SYS_PARAM_H@
+HAVE_SYS_RANDOM_H = @HAVE_SYS_RANDOM_H@
+HAVE_SYS_SELECT_H = @HAVE_SYS_SELECT_H@
+HAVE_SYS_SOCKET_H = @HAVE_SYS_SOCKET_H@
+HAVE_SYS_TIME_H = @HAVE_SYS_TIME_H@
+HAVE_SYS_TYPES_H = @HAVE_SYS_TYPES_H@
+HAVE_SYS_UIO_H = @HAVE_SYS_UIO_H@
+HAVE_TERMIOS_H = @HAVE_TERMIOS_H@
+HAVE_TIMEGM = @HAVE_TIMEGM@
+HAVE_TIMESPEC_GET = @HAVE_TIMESPEC_GET@
+HAVE_TIMESPEC_GETRES = @HAVE_TIMESPEC_GETRES@
+HAVE_TIMEZONE_T = @HAVE_TIMEZONE_T@
+HAVE_TYPE_VOLATILE_SIG_ATOMIC_T = @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
+HAVE_UNISTD_H = @HAVE_UNISTD_H@
+HAVE_UNLINKAT = @HAVE_UNLINKAT@
+HAVE_UNLOCKPT = @HAVE_UNLOCKPT@
+HAVE_USLEEP = @HAVE_USLEEP@
+HAVE_UTIME = @HAVE_UTIME@
+HAVE_UTIMENSAT = @HAVE_UTIMENSAT@
+HAVE_UTIME_H = @HAVE_UTIME_H@
+HAVE_VASPRINTF = @HAVE_VASPRINTF@
+HAVE_VDPRINTF = @HAVE_VDPRINTF@
+HAVE_VISIBILITY = @HAVE_VISIBILITY@
+HAVE_WCHAR_H = @HAVE_WCHAR_H@
+HAVE_WCHAR_T = @HAVE_WCHAR_T@
+HAVE_WCPCPY = @HAVE_WCPCPY@
+HAVE_WCPNCPY = @HAVE_WCPNCPY@
+HAVE_WCRTOMB = @HAVE_WCRTOMB@
+HAVE_WCSCASECMP = @HAVE_WCSCASECMP@
+HAVE_WCSCAT = @HAVE_WCSCAT@
+HAVE_WCSCHR = @HAVE_WCSCHR@
+HAVE_WCSCMP = @HAVE_WCSCMP@
+HAVE_WCSCOLL = @HAVE_WCSCOLL@
+HAVE_WCSCPY = @HAVE_WCSCPY@
+HAVE_WCSCSPN = @HAVE_WCSCSPN@
+HAVE_WCSDUP = @HAVE_WCSDUP@
+HAVE_WCSFTIME = @HAVE_WCSFTIME@
+HAVE_WCSLEN = @HAVE_WCSLEN@
+HAVE_WCSNCASECMP = @HAVE_WCSNCASECMP@
+HAVE_WCSNCAT = @HAVE_WCSNCAT@
+HAVE_WCSNCMP = @HAVE_WCSNCMP@
+HAVE_WCSNCPY = @HAVE_WCSNCPY@
+HAVE_WCSNLEN = @HAVE_WCSNLEN@
+HAVE_WCSNRTOMBS = @HAVE_WCSNRTOMBS@
+HAVE_WCSPBRK = @HAVE_WCSPBRK@
+HAVE_WCSRCHR = @HAVE_WCSRCHR@
+HAVE_WCSRTOMBS = @HAVE_WCSRTOMBS@
+HAVE_WCSSPN = @HAVE_WCSSPN@
+HAVE_WCSSTR = @HAVE_WCSSTR@
+HAVE_WCSTOK = @HAVE_WCSTOK@
+HAVE_WCSWIDTH = @HAVE_WCSWIDTH@
+HAVE_WCSXFRM = @HAVE_WCSXFRM@
+HAVE_WCTRANS_T = @HAVE_WCTRANS_T@
+HAVE_WCTYPE_H = @HAVE_WCTYPE_H@
+HAVE_WCTYPE_T = @HAVE_WCTYPE_T@
+HAVE_WINSOCK2_H = @HAVE_WINSOCK2_H@
+HAVE_WINT_T = @HAVE_WINT_T@
+HAVE_WMEMCHR = @HAVE_WMEMCHR@
+HAVE_WMEMCMP = @HAVE_WMEMCMP@
+HAVE_WMEMCPY = @HAVE_WMEMCPY@
+HAVE_WMEMMOVE = @HAVE_WMEMMOVE@
+HAVE_WMEMPCPY = @HAVE_WMEMPCPY@
+HAVE_WMEMSET = @HAVE_WMEMSET@
+HAVE_WS2TCPIP_H = @HAVE_WS2TCPIP_H@
+HAVE_XLOCALE_H = @HAVE_XLOCALE_H@
+HAVE__BOOL = @HAVE__BOOL@
+HAVE__EXIT = @HAVE__EXIT@
+IGNORE_UNUSED_LIBRARIES_CFLAGS = @IGNORE_UNUSED_LIBRARIES_CFLAGS@
+INCLUDE_NEXT = @INCLUDE_NEXT@
+INCLUDE_NEXT_AS_FIRST_DIRECTIVE = @INCLUDE_NEXT_AS_FIRST_DIRECTIVE@
+INSTALL = @INSTALL@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+INT32_MAX_LT_INTMAX_MAX = @INT32_MAX_LT_INTMAX_MAX@
+INT64_MAX_EQ_LONG_MAX = @INT64_MAX_EQ_LONG_MAX@
+INTLLIBS = @INTLLIBS@
+INTL_MACOSX_LIBS = @INTL_MACOSX_LIBS@
+LD = @LD@
+LDFLAGS = @LDFLAGS@
+LEX = @LEX@
+LEXLIB = @LEXLIB@
+LEX_OUTPUT_ROOT = @LEX_OUTPUT_ROOT@
+LIBCOMPRESS = @LIBCOMPRESS@
+LIBICONV = @LIBICONV@
+LIBINTL = @LIBINTL@
+LIBMAN_EXPORT_LDFLAGS = @LIBMAN_EXPORT_LDFLAGS@
+LIBMULTITHREAD = @LIBMULTITHREAD@
+LIBOBJS = @LIBOBJS@
+LIBPMULTITHREAD = @LIBPMULTITHREAD@
+LIBPTHREAD = @LIBPTHREAD@
+LIBS = @LIBS@
+LIBSOCKET = @LIBSOCKET@
+LIBSTDTHREAD = @LIBSTDTHREAD@
+LIBTHREAD = @LIBTHREAD@
+LIBTOOL = @LIBTOOL@
+LIB_CLOCK_GETTIME = @LIB_CLOCK_GETTIME@
+LIB_GETLOGIN = @LIB_GETLOGIN@
+LIB_GETRANDOM = @LIB_GETRANDOM@
+LIB_HARD_LOCALE = @LIB_HARD_LOCALE@
+LIB_MBRTOWC = @LIB_MBRTOWC@
+LIB_NANOSLEEP = @LIB_NANOSLEEP@
+LIB_NL_LANGINFO = @LIB_NL_LANGINFO@
+LIB_PTHREAD_SIGMASK = @LIB_PTHREAD_SIGMASK@
+LIB_SCHED_YIELD = @LIB_SCHED_YIELD@
+LIB_SELECT = @LIB_SELECT@
+LIB_SETLOCALE_NULL = @LIB_SETLOCALE_NULL@
+LIMITS_H = @LIMITS_H@
+LINGUAS = @LINGUAS@
+LIPO = @LIPO@
+LN_S = @LN_S@
+LOCALCHARSET_TESTS_ENVIRONMENT = @LOCALCHARSET_TESTS_ENVIRONMENT@
+LOCALENAME_ENHANCE_LOCALE_FUNCS = @LOCALENAME_ENHANCE_LOCALE_FUNCS@
+LOCALE_FR = @LOCALE_FR@
+LOCALE_FR_UTF8 = @LOCALE_FR_UTF8@
+LOCALE_JA = @LOCALE_JA@
+LOCALE_ZH_CN = @LOCALE_ZH_CN@
+LTALLOCA = @LTALLOCA@
+LTLIBICONV = @LTLIBICONV@
+LTLIBINTL = @LTLIBINTL@
+LTLIBMULTITHREAD = @LTLIBMULTITHREAD@
+LTLIBOBJS = @LTLIBOBJS@
+LTLIBTHREAD = @LTLIBTHREAD@
+LT_SYS_LIBRARY_PATH = @LT_SYS_LIBRARY_PATH@
+MAKEINFO = @MAKEINFO@
+MANDIR_LAYOUT = @MANDIR_LAYOUT@
+MANIFEST_TOOL = @MANIFEST_TOOL@
+MAN_SUBDIRS = @MAN_SUBDIRS@
+MKDIR_P = @MKDIR_P@
+MSGFMT = @MSGFMT@
+MSGFMT_015 = @MSGFMT_015@
+MSGMERGE = @MSGMERGE@
+NEXT_AS_FIRST_DIRECTIVE_CTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_CTYPE_H@
+NEXT_AS_FIRST_DIRECTIVE_DIRENT_H = @NEXT_AS_FIRST_DIRECTIVE_DIRENT_H@
+NEXT_AS_FIRST_DIRECTIVE_ERRNO_H = @NEXT_AS_FIRST_DIRECTIVE_ERRNO_H@
+NEXT_AS_FIRST_DIRECTIVE_FCNTL_H = @NEXT_AS_FIRST_DIRECTIVE_FCNTL_H@
+NEXT_AS_FIRST_DIRECTIVE_FLOAT_H = @NEXT_AS_FIRST_DIRECTIVE_FLOAT_H@
+NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H = @NEXT_AS_FIRST_DIRECTIVE_FNMATCH_H@
+NEXT_AS_FIRST_DIRECTIVE_GETOPT_H = @NEXT_AS_FIRST_DIRECTIVE_GETOPT_H@
+NEXT_AS_FIRST_DIRECTIVE_GLOB_H = @NEXT_AS_FIRST_DIRECTIVE_GLOB_H@
+NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = @NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H = @NEXT_AS_FIRST_DIRECTIVE_LANGINFO_H@
+NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
+NEXT_AS_FIRST_DIRECTIVE_LOCALE_H = @NEXT_AS_FIRST_DIRECTIVE_LOCALE_H@
+NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDARG_H = @NEXT_AS_FIRST_DIRECTIVE_STDARG_H@
+NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
+NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
+NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
+NEXT_AS_FIRST_DIRECTIVE_STDLIB_H = @NEXT_AS_FIRST_DIRECTIVE_STDLIB_H@
+NEXT_AS_FIRST_DIRECTIVE_STRINGS_H = @NEXT_AS_FIRST_DIRECTIVE_STRINGS_H@
+NEXT_AS_FIRST_DIRECTIVE_STRING_H = @NEXT_AS_FIRST_DIRECTIVE_STRING_H@
+NEXT_AS_FIRST_DIRECTIVE_SYSEXITS_H = @NEXT_AS_FIRST_DIRECTIVE_SYSEXITS_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_FILE_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_FILE_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_IOCTL_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_RANDOM_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_RANDOM_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SELECT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_SOCKET_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_STAT_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_TYPES_H@
+NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H = @NEXT_AS_FIRST_DIRECTIVE_SYS_UIO_H@
+NEXT_AS_FIRST_DIRECTIVE_TERMIOS_H = @NEXT_AS_FIRST_DIRECTIVE_TERMIOS_H@
+NEXT_AS_FIRST_DIRECTIVE_TIME_H = @NEXT_AS_FIRST_DIRECTIVE_TIME_H@
+NEXT_AS_FIRST_DIRECTIVE_UNISTD_H = @NEXT_AS_FIRST_DIRECTIVE_UNISTD_H@
+NEXT_AS_FIRST_DIRECTIVE_UTIME_H = @NEXT_AS_FIRST_DIRECTIVE_UTIME_H@
+NEXT_AS_FIRST_DIRECTIVE_WCHAR_H = @NEXT_AS_FIRST_DIRECTIVE_WCHAR_H@
+NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H = @NEXT_AS_FIRST_DIRECTIVE_WCTYPE_H@
+NEXT_CTYPE_H = @NEXT_CTYPE_H@
+NEXT_DIRENT_H = @NEXT_DIRENT_H@
+NEXT_ERRNO_H = @NEXT_ERRNO_H@
+NEXT_FCNTL_H = @NEXT_FCNTL_H@
+NEXT_FLOAT_H = @NEXT_FLOAT_H@
+NEXT_FNMATCH_H = @NEXT_FNMATCH_H@
+NEXT_GETOPT_H = @NEXT_GETOPT_H@
+NEXT_GLOB_H = @NEXT_GLOB_H@
+NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
+NEXT_LANGINFO_H = @NEXT_LANGINFO_H@
+NEXT_LIMITS_H = @NEXT_LIMITS_H@
+NEXT_LOCALE_H = @NEXT_LOCALE_H@
+NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDARG_H = @NEXT_STDARG_H@
+NEXT_STDDEF_H = @NEXT_STDDEF_H@
+NEXT_STDINT_H = @NEXT_STDINT_H@
+NEXT_STDIO_H = @NEXT_STDIO_H@
+NEXT_STDLIB_H = @NEXT_STDLIB_H@
+NEXT_STRINGS_H = @NEXT_STRINGS_H@
+NEXT_STRING_H = @NEXT_STRING_H@
+NEXT_SYSEXITS_H = @NEXT_SYSEXITS_H@
+NEXT_SYS_FILE_H = @NEXT_SYS_FILE_H@
+NEXT_SYS_IOCTL_H = @NEXT_SYS_IOCTL_H@
+NEXT_SYS_RANDOM_H = @NEXT_SYS_RANDOM_H@
+NEXT_SYS_SELECT_H = @NEXT_SYS_SELECT_H@
+NEXT_SYS_SOCKET_H = @NEXT_SYS_SOCKET_H@
+NEXT_SYS_STAT_H = @NEXT_SYS_STAT_H@
+NEXT_SYS_TIME_H = @NEXT_SYS_TIME_H@
+NEXT_SYS_TYPES_H = @NEXT_SYS_TYPES_H@
+NEXT_SYS_UIO_H = @NEXT_SYS_UIO_H@
+NEXT_TERMIOS_H = @NEXT_TERMIOS_H@
+NEXT_TIME_H = @NEXT_TIME_H@
+NEXT_UNISTD_H = @NEXT_UNISTD_H@
+NEXT_UTIME_H = @NEXT_UTIME_H@
+NEXT_WCHAR_H = @NEXT_WCHAR_H@
+NEXT_WCTYPE_H = @NEXT_WCTYPE_H@
+NM = @NM@
+NMEDIT = @NMEDIT@
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+OBJEXT = @OBJEXT@
+OTOOL = @OTOOL@
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+PKG_CONFIG_PATH = @PKG_CONFIG_PATH@
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+PRAGMA_COLUMNS = @PRAGMA_COLUMNS@
+PRAGMA_SYSTEM_HEADER = @PRAGMA_SYSTEM_HEADER@
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+PTHREAD_H_DEFINES_STRUCT_TIMESPEC = @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
+PTRDIFF_T_SUFFIX = @PTRDIFF_T_SUFFIX@
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+REPLACE_ALIGNED_ALLOC = @REPLACE_ALIGNED_ALLOC@
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+	  && gtags -i $(GTAGS_ARGS) "$$here"
+cscopelist: cscopelist-am
+
+cscopelist-am: $(am__tagged_files)
+	list='$(am__tagged_files)'; \
+	case "$(srcdir)" in \
+	  [\\/]* | ?:[\\/]*) sdir="$(srcdir)" ;; \
+	  *) sdir=$(subdir)/$(srcdir) ;; \
+	esac; \
+	for i in $$list; do \
+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
+	    echo "$$sdir/$$i"; \
+	  fi; \
+	done >> $(top_builddir)/cscope.files
+
+distclean-tags:
+	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES) $(DATA)
+installdirs:
+	for dir in "$(DESTDIR)$(pkglibdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libtool clean-pkglibLTLIBRARIES \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/libman_la-appendstr.Plo
+	-rm -f ./$(DEPDIR)/libman_la-cleanup.Plo
+	-rm -f ./$(DEPDIR)/libman_la-compression.Plo
+	-rm -f ./$(DEPDIR)/libman_la-debug.Plo
+	-rm -f ./$(DEPDIR)/libman_la-encodings.Plo
+	-rm -f ./$(DEPDIR)/libman_la-fatal.Plo
+	-rm -f ./$(DEPDIR)/libman_la-filenames.Plo
+	-rm -f ./$(DEPDIR)/libman_la-glcontainers.Plo
+	-rm -f ./$(DEPDIR)/libman_la-linelength.Plo
+	-rm -f ./$(DEPDIR)/libman_la-orderfiles.Plo
+	-rm -f ./$(DEPDIR)/libman_la-pathsearch.Plo
+	-rm -f ./$(DEPDIR)/libman_la-sandbox.Plo
+	-rm -f ./$(DEPDIR)/libman_la-security.Plo
+	-rm -f ./$(DEPDIR)/libman_la-tempfile.Plo
+	-rm -f ./$(DEPDIR)/libman_la-util.Plo
+	-rm -f ./$(DEPDIR)/libman_la-wordfnmatch.Plo
+	-rm -f ./$(DEPDIR)/libman_la-xregcomp.Plo
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-pkglibLTLIBRARIES
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/libman_la-appendstr.Plo
+	-rm -f ./$(DEPDIR)/libman_la-cleanup.Plo
+	-rm -f ./$(DEPDIR)/libman_la-compression.Plo
+	-rm -f ./$(DEPDIR)/libman_la-debug.Plo
+	-rm -f ./$(DEPDIR)/libman_la-encodings.Plo
+	-rm -f ./$(DEPDIR)/libman_la-fatal.Plo
+	-rm -f ./$(DEPDIR)/libman_la-filenames.Plo
+	-rm -f ./$(DEPDIR)/libman_la-glcontainers.Plo
+	-rm -f ./$(DEPDIR)/libman_la-linelength.Plo
+	-rm -f ./$(DEPDIR)/libman_la-orderfiles.Plo
+	-rm -f ./$(DEPDIR)/libman_la-pathsearch.Plo
+	-rm -f ./$(DEPDIR)/libman_la-sandbox.Plo
+	-rm -f ./$(DEPDIR)/libman_la-security.Plo
+	-rm -f ./$(DEPDIR)/libman_la-tempfile.Plo
+	-rm -f ./$(DEPDIR)/libman_la-util.Plo
+	-rm -f ./$(DEPDIR)/libman_la-wordfnmatch.Plo
+	-rm -f ./$(DEPDIR)/libman_la-xregcomp.Plo
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-pkglibLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libtool clean-pkglibLTLIBRARIES \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-man install-pdf \
+	install-pdf-am install-pkglibLTLIBRARIES install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-pkglibLTLIBRARIES
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/lib/README b/lib/README
new file mode 100644
index 0000000..6a99120
--- /dev/null
+++ b/lib/README
@@ -0,0 +1,23 @@
+These library source files have various authors and specific licenses,
+but may all be used as part of a complete work that is distributed under
+the terms of the GNU General Public License version 2 or later.
+
+See the files ../docs/COPYING.GPLv2 and ../docs/COPYING.LIB for relevant
+information.
+
+appendstr.*			author - Markus Armbruster
+cleanup.*			author - Markus Armbruster, Colin Watson
+compression.*			author - Wilf., Colin Watson
+debug.*				author - Colin Watson
+encodings.*			author - Colin Watson
+glcontainers.*			author - Colin Watson
+linelength.*			author - Martin Schulze, Jon Tombs, Colin Watson
+mp.h				author - Simon Tatham
+orderfiles.*			author - Colin Watson
+pathsearch.*			author - Colin Watson
+sandbox.*			author - Colin Watson
+security.*			author - John W. Eaton, Wilf., Colin Watson
+tempfile.*			author - Colin Watson
+util.*				author - John W. Eaton, Wilf., Colin Watson
+wordfnmatch.*			author - Colin Watson
+xregcomp.*			author - Colin Watson
diff --git a/lib/appendstr.c b/lib/appendstr.c
new file mode 100644
index 0000000..3be8bff
--- /dev/null
+++ b/lib/appendstr.c
@@ -0,0 +1,59 @@
+/* appendstr.c -- append to a dynamically allocated string
+   Copyright (C) 1994 Markus Armbruster
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Library Public License
+   as published by the Free Software Foundation; either version 2, 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; see the file docs/COPYING.LIB.  If not, write
+   to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
+   02139, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <string.h>
+#include <stdarg.h>
+
+#include "xalloc.h"
+
+#include "manconfig.h"
+
+#include "appendstr.h"
+
+/* append strings to first argument, which is realloced to the correct size
+   first arg may be NULL */
+char *appendstr (char *str, ...)
+{
+      va_list ap;
+      size_t len, newlen;
+      char *next, *end;
+
+      len = str ? strlen (str) : 0;
+
+      va_start (ap, str);
+      newlen = len + 1;
+      while ((next = va_arg (ap, char *)))
+              newlen += strlen (next);
+      va_end (ap);
+
+      str = xrealloc (str, newlen);
+      end = str + len;
+
+      va_start (ap, str);
+      while ((next = va_arg (ap, char *))) {
+              strcpy (end, next);
+              end += strlen (next);
+      }
+      va_end (ap);
+
+      return str;
+}
diff --git a/lib/appendstr.h b/lib/appendstr.h
new file mode 100644
index 0000000..9875faa
--- /dev/null
+++ b/lib/appendstr.h
@@ -0,0 +1,24 @@
+/* appendstr.h -- interface to appending to a dynamically allocated string
+ *
+ * Copyright (C) 1994 Markus Armbruster
+ * Copyright (C) 2022 Colin Watson
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Library Public License
+ * as published by the Free Software Foundation; either version 2, 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; see the file docs/COPYING.LIB.  If not, write
+ * to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA
+ * 02139, USA.
+ */
+
+#include "attribute.h"
+
+NODISCARD extern char *appendstr (char *, ...) ATTRIBUTE_SENTINEL ();
diff --git a/lib/cleanup.c b/lib/cleanup.c
new file mode 100644
index 0000000..42b603b
--- /dev/null
+++ b/lib/cleanup.c
@@ -0,0 +1,279 @@
+/*
+ * cleanup.c -- simple dynamic cleanup function management
+ * Copyright (C) 1995 Markus Armbruster.
+ * Copyright (C) 2007 Colin Watson.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; see the file docs/COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
+ * Floor, Boston, MA  02110-1301  USA.
+*/
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>		/* SunOS's loosing assert.h needs it */
+#include <assert.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "xalloc.h"
+
+#include "manconfig.h"		/* for FATAL */
+#include "cleanup.h"
+
+
+
+/* Dealing with signals */
+
+
+/* saved signal actions */
+#ifdef SIGHUP
+static struct sigaction saved_hup_action;
+#endif /* SIGHUP */
+static struct sigaction saved_int_action;
+static struct sigaction saved_term_action;
+
+
+/* Run cleanups, then reraise signal with default handler. */
+static _Noreturn void
+sighandler (int signo)
+{
+  struct sigaction act;
+  sigset_t set;
+
+  do_cleanups_sigsafe (true);
+
+  /* set default signal action */
+  memset (&act, 0, sizeof act);
+  act.sa_handler = SIG_DFL;
+  sigemptyset (&act.sa_mask);
+  act.sa_flags = 0;
+  if (sigaction (signo, &act, NULL)) {
+    /* should not happen */
+    _exit (FATAL);		/* exit() is taboo from signal handlers! */
+  }
+
+  /* unmask signo */
+  if (   sigemptyset (&set)
+      || sigaddset (&set, signo)
+      || sigprocmask (SIG_UNBLOCK, &set, NULL)) {
+    /* shouldn't happen */
+    _exit (FATAL);		/* exit() is taboo from signal handlers! */
+  }
+
+  /* signal has now default action and is unmasked,
+     reraise it to terminate program abnormally */
+  raise (signo);
+  abort();
+}
+
+
+/* Save signo's current action to oldact, if its handler is SIG_DFL
+   install sighandler, return 0 on success, -1 on failure. */
+static int
+trap_signal (int signo, struct sigaction *oldact)
+{
+  if (sigaction (signo, NULL, oldact)) {
+    return -1;
+  }
+
+  if (oldact->sa_handler == SIG_DFL) {
+    struct sigaction act;
+
+    memset (&act, 0, sizeof act);
+    act.sa_handler = sighandler;
+    sigemptyset (&act.sa_mask);
+    act.sa_flags = 0;
+    return sigaction (signo, &act, oldact);
+  }
+
+  return 0;
+}
+
+
+/* Trap some abnormal exits to call do_cleanups(). */
+static int
+trap_abnormal_exits (void)
+{
+#ifdef SIGHUP
+  if (trap_signal (SIGHUP, &saved_hup_action))
+    return -1;
+#endif /* SIGHUP */
+  if (trap_signal (SIGINT, &saved_int_action))
+    return -1;
+  if (trap_signal (SIGTERM, &saved_term_action))
+    return -1;
+  return 0;
+}
+
+
+/* Restore signo's action from oldact if its current handler is
+   sighandler, return 0 on success, -1 on failure. */
+static int
+untrap_signal (int signo, struct sigaction *oldact)
+{
+  struct sigaction act;
+  if (sigaction (signo, NULL, &act)) {
+    return -1;
+  }
+
+  if (act.sa_handler == sighandler) {
+    return sigaction (signo, oldact, NULL);
+  }
+
+  return 0;
+}
+
+
+/* Undo a previous trap_abnormal_exits(). */
+static int
+untrap_abnormal_exits (void)
+{
+#ifdef SIGHUP
+  if (untrap_signal (SIGHUP, &saved_hup_action))
+    return -1;
+#endif /* SIGHUP */
+  if (untrap_signal (SIGINT, &saved_int_action))
+    return -1;
+  if (untrap_signal (SIGTERM, &saved_term_action))
+    return -1;
+  return 0;
+}
+
+
+
+typedef struct {
+  cleanup_fun fun;
+  void *arg;
+  int sigsafe;
+} slot;
+
+static slot *stack = NULL;	/* stack of cleanup functions */
+static unsigned nslots = 0;	/* #slots in stack */
+static unsigned tos = 0;	/* top of stack, 0 <= tos <= nslots */
+
+/* Call cleanup functions in stack from from top to bottom,
+ * Automatically called on program termination via exit(3) or default
+ * action for SIGHUP, SIGINT or SIGTERM.
+ * Since this may be called from a signal handler, do not use free().
+ * If in_sighandler is true, cleanup functions with sigsafe=0 will not be
+ * called.
+ */
+void
+do_cleanups_sigsafe (bool in_sighandler)
+{
+  unsigned i;
+
+  assert (tos <= nslots);
+  for (i = tos; i > 0; --i)
+    if (!in_sighandler || stack[i-1].sigsafe)
+      stack[i-1].fun (stack[i-1].arg);
+}
+
+/* Call cleanup functions in stack from from top to bottom,
+ * Automatically called on program termination via exit(3).
+ */
+void
+do_cleanups (void)
+{
+  do_cleanups_sigsafe (false);
+  tos = 0;
+  nslots = 0;
+  free (stack);
+  stack = NULL;
+}
+
+
+/* Push a cleanup function on the cleanup stack,
+ * return 0 on success, -1 on failure.
+ * Caution: the cleanup function may be called from signal handlers if
+ * sigsafe=1. If you just want a convenient atexit() wrapper, pass
+ * sigsafe=0.
+ */
+int
+push_cleanup (cleanup_fun fun, void *arg, int sigsafe)
+{
+  static bool handler_installed = false;
+
+  assert (tos <= nslots);
+
+  if (!handler_installed) {
+    if (atexit (do_cleanups))
+      return -1;
+    handler_installed = true;
+  }
+
+  if (tos == nslots) {
+    /* stack is full, allocate another slot */
+    /* stack is not expected to grow much, otherwise we would double it */
+    slot *new_stack;
+
+    if (stack) {
+      new_stack = xnrealloc (stack, nslots+1, sizeof (slot));
+    } else {
+      new_stack = xnmalloc (nslots+1, sizeof (slot));
+    }
+
+    if (!new_stack) return -1;
+    stack = new_stack;
+    ++nslots;
+  }
+
+  assert (tos < nslots);
+  stack[tos].fun = fun;
+  stack[tos].arg = arg;
+  stack[tos].sigsafe = sigsafe;
+  ++tos;
+
+
+  trap_abnormal_exits();
+
+  return 0;
+}
+
+
+/* Remove topmost cleanup function from the cleanup stack that matches the
+ * given values.
+ */
+void
+pop_cleanup (cleanup_fun fun, void *arg)
+{
+  unsigned i, j;
+
+  assert (tos > 0);
+
+  for (i = tos; i > 0; --i) {
+    if (stack[i-1].fun == fun && stack[i-1].arg == arg) {
+      for (j = i; j < tos; ++j)
+        stack[j-1] = stack[j];
+      --tos;
+      break;
+    }
+  }
+
+  if (tos == 0) untrap_abnormal_exits();
+}
+
+
+/* Pop all cleanup functions from the cleanup stack. */
+void
+pop_all_cleanups (void)
+{
+  tos = 0;
+  untrap_abnormal_exits();
+}
diff --git a/lib/cleanup.h b/lib/cleanup.h
new file mode 100644
index 0000000..5415b7f
--- /dev/null
+++ b/lib/cleanup.h
@@ -0,0 +1,35 @@
+/*
+ * cleanup.h -- simple dynamic cleanup function management
+ * Copyright (C) 1995 Markus Armbruster.
+ * Copyright (C) 2007 Colin Watson.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; see the file docs/COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 51 Franklin St, Fifth
+ * Floor, Boston, MA  02110-1301  USA.
+ */
+
+#ifndef _CLEANUP_H
+#define _CLEANUP_H
+
+#include <stdbool.h>
+
+typedef void (*cleanup_fun) (void *);
+
+extern void do_cleanups_sigsafe (bool);
+extern void do_cleanups (void);
+extern int push_cleanup (cleanup_fun, void *, int);
+extern void pop_cleanup (cleanup_fun, void *);
+extern void pop_all_cleanups (void);
+
+#endif /* _CLEANUP_H */
diff --git a/lib/compression.c b/lib/compression.c
new file mode 100644
index 0000000..fe4696c
--- /dev/null
+++ b/lib/compression.c
@@ -0,0 +1,195 @@
+/*
+ * compression.c: code to find decompressor / compression extension
+ *
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001-2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Sat Aug 20 15:01:02 BST 1994  Wilf. (G.Wilford@ee.surrey.ac.uk)
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <errno.h>
+#include <signal.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "error.h"
+#include "xstrndup.h"
+#include "xvasprintf.h"
+
+#include "manconfig.h"
+
+#include "appendstr.h"
+#include "compression.h"
+
+/*--------------------------------------------------------------------------*/
+/* This is where we define the decompressors used to decompress any nroff   */
+/* source that we find. All cat pages are compressed with either gzip (if   */
+/* available) or compress. This is not the place to define _the_ cat page   */
+/* decompressor - see ./manconfig.h for that.                               */
+/*                                                                          */
+/* To add a decompressor all you need to know is its name (preferrably its  */
+/* location), and the unique extension that it gives to files compressed    */
+/* with it. Here is an example. You have a compressor named foobar and      */
+/* compressed files have an extension of .fb . It is located in /usr/bin    */
+/* and requires a -d option to be used as a decompressor. Add the following */
+/* line to the structure below.                                             */
+/*                                                                          */
+/* {"/usr/bin/foobar -d", "fb", NULL},                                      */
+/*--------------------------------------------------------------------------*/
+
+struct compression comp_list[] = {
+
+/* If we have gzip, incorporate the following */
+#ifdef HAVE_GZIP
+	{PROG_GUNZIP, "gz", NULL},
+	{PROG_GUNZIP, "z", NULL},
+#endif /* HAVE_GZIP */
+
+/* If we have compress, incorporate the following */
+#ifdef HAVE_COMPRESS
+	{PROG_UNCOMPRESS, "Z", NULL},
+/* Else if we have gzip, incorporate the following */
+#elif defined (HAVE_GZIP)
+	{PROG_GUNZIP, "Z", NULL},
+#endif /* HAVE_COMPRESS || HAVE_GZIP */
+
+/* If we have bzip2, incorporate the following */
+#ifdef HAVE_BZIP2
+	{PROG_BUNZIP2, "bz2", NULL},
+#endif /* HAVE_BZIP2 */
+
+/* If we have xz, incorporate the following */
+#ifdef HAVE_XZ
+	{PROG_UNXZ, "xz", NULL},
+	{PROG_UNXZ, "lzma", NULL},
+/* Else if we have lzma, incorporate the following */
+#elif defined (HAVE_LZMA)
+	{PROG_UNLZMA, "lzma", NULL},
+#endif /* HAVE_XZ || HAVE_LZMA */
+
+/* If we have lzip, incorporate the following */
+#ifdef HAVE_LZIP
+	{PROG_UNLZIP, "lz", NULL},
+#endif /* HAVE_LZIP */
+
+/* If we have zstd, incorporate the following */
+#ifdef HAVE_ZSTD
+	{PROG_UNZSTD, "zst", NULL},
+	{PROG_UNZSTD, "zstd", NULL},
+#endif /* HAVE_ZSTD */
+
+/*------------------------------------------------------*/
+/* Add your decompressor(s) and extension(s) below here */
+/*------------------------------------------------------*/
+
+/*----------------*/
+/* and above here */
+/*----------------*/
+
+/* ... and the last structure is */
+	{NULL, NULL, NULL}
+};
+
+/* Take filename as arg, return structure containing decompressor
+   and extension, or NULL if no comp extension found.
+   If want_stem, set comp->stem to the filename without extension, which
+   the caller should free.
+
+   eg.
+   	filename = /usr/man/man1/foo.1.gz
+
+	comp->prog = "/usr/bin/gzip -dc";
+   	comp->ext = "gz";
+   	comp->stem = "/usr/man/man1/foo.1";
+ */
+struct compression *comp_info (const char *filename, bool want_stem)
+{
+	const char *ext;
+	static struct compression hpux_comp =
+		{PROG_GUNZIP " -S \"\"", "", NULL};
+
+	ext = strrchr (filename, '.');
+
+	if (ext) {
+		struct compression *comp;
+		for (comp = comp_list; comp->ext; comp++) {
+			if (strcmp (comp->ext, ext + 1) == 0) {
+				if (want_stem)
+					comp->stem = xstrndup (filename,
+							       ext - filename);
+				else
+					comp->stem = NULL;
+				return comp;
+			}
+		}
+	}
+
+	if (*PROG_GUNZIP) {
+		ext = strstr (filename, ".Z/");
+		if (ext) {
+			if (want_stem)
+				hpux_comp.stem = xstrndup (filename,
+							   ext - filename);
+			else
+				hpux_comp.stem = NULL;
+			return &hpux_comp;
+		}
+	}
+
+	return NULL;
+}
+
+/* take filename w/o comp ext. as arg, return comp->stem as a relative
+   compressed file or NULL if none found */
+struct compression *comp_file (const char *filename)
+{
+	size_t len;
+	char *compfile;
+	struct compression *comp;
+
+	compfile = xasprintf ("%s.", filename);
+	assert (compfile);
+	len = strlen (compfile);
+
+	for (comp = comp_list; comp->ext; comp++) {
+		struct stat buf;
+
+		compfile = appendstr (compfile, comp->ext, (void *) 0);
+
+		if (stat (compfile, &buf) == 0) {
+			comp->stem = compfile;
+			return comp;
+		}
+
+		*(compfile + len) = '\0';
+	}
+	free (compfile);
+	return NULL;
+}
diff --git a/lib/compression.h b/lib/compression.h
new file mode 100644
index 0000000..52ede35
--- /dev/null
+++ b/lib/compression.h
@@ -0,0 +1,42 @@
+/*
+ * compression.h: interface to finding decompressor / compression extension
+ *
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001-2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <stdbool.h>
+
+struct compression {
+	/* The following are const because they should be pointers to parts
+	 * of strings allocated elsewhere and should not be written through
+	 * or freed themselves.
+	 */
+	const char *prog;
+	const char *ext;
+	/* The following should be freed when discarding an instance of this
+	 * structure.
+	 */
+	char *stem;
+};
+
+extern struct compression comp_list[];
+
+extern struct compression *comp_info (const char *filename, bool want_stem);
+extern struct compression *comp_file (const char *filename);
diff --git a/lib/debug.c b/lib/debug.c
new file mode 100644
index 0000000..d55d810
--- /dev/null
+++ b/lib/debug.c
@@ -0,0 +1,78 @@
+/*
+ * debug.c: debugging messages
+ *
+ * Copyright (C) 2007 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+
+#include "attribute.h"
+
+#include "manconfig.h"
+
+#include "debug.h"
+
+bool debug_level = false;
+
+void init_debug (void)
+{
+	const char *man_debug = getenv ("MAN_DEBUG");
+	if (man_debug && STREQ (man_debug, "1"))
+		debug_level = true;
+}
+
+static void ATTRIBUTE_FORMAT ((__printf__, 1, 0)) vdebug (const char *message,
+							  va_list args)
+{
+	if (debug_level)
+		vfprintf (stderr, message, args);
+}
+
+void debug (const char *message, ...)
+{
+	if (debug_level) {
+		va_list args;
+
+		va_start (args, message);
+		vdebug (message, args);
+		va_end (args);
+	}
+}
+
+void debug_error (const char *message, ...)
+{
+	if (debug_level) {
+		va_list args;
+
+		va_start (args, message);
+		vdebug (message, args);
+		va_end (args);
+
+		debug (": %s\n", strerror (errno));
+	}
+}
diff --git a/lib/debug.h b/lib/debug.h
new file mode 100644
index 0000000..1421eea
--- /dev/null
+++ b/lib/debug.h
@@ -0,0 +1,32 @@
+/*
+ * debug.h: interface to debugging messages
+ *
+ * Copyright (C) 2007-2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <stdbool.h>
+
+#include "attribute.h"
+
+extern bool debug_level;	/* shows whether -d issued */
+extern void init_debug (void);
+extern void debug (const char *message, ...)
+	ATTRIBUTE_FORMAT ((__printf__, 1, 2));
+extern void debug_error (const char *message, ...)
+	ATTRIBUTE_FORMAT ((__printf__, 1, 2));
diff --git a/lib/encodings.c b/lib/encodings.c
new file mode 100644
index 0000000..68c06c6
--- /dev/null
+++ b/lib/encodings.c
@@ -0,0 +1,780 @@
+/*
+ * encodings.c: locale and encoding handling for man
+ *
+ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ *               Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <locale.h>
+#include <ctype.h>
+
+#include "attribute.h"
+#include "gettext.h"
+#include "localcharset.h"
+#include "xalloc.h"
+#include "xstrndup.h"
+
+#include "manconfig.h"
+
+#include "debug.h"
+#include "encodings.h"
+#include "pathsearch.h"
+
+
+/* Due to historical limitations in groff (which may be removed in the
+ * future), there is no mechanism for a man page to specify its own
+ * encoding. This means that each national language directory needs to carry
+ * with it information about its encoding, and each groff device needs to
+ * have a default encoding associated with it. Out of the box, groff
+ * formally allows only ISO-8859-1 on input; however, patches originating
+ * with Debian and imported by many other GNU/Linux distributions change
+ * this somewhat.
+ *
+ * Eventually, groff will support proper Unicode input, and much of this
+ * horror can go away.
+ *
+ * Do *not* confuse source encoding with groff encoding. The encoding
+ * specified in this table is the encoding in which the source man pages in
+ * each language directory are expected to be written. The groff encoding is
+ * determined by the selected groff device and sometimes also by the user's
+ * locale.
+ *
+ * The standard output encoding is the encoding assumed for cat pages for
+ * each language directory. It must *not* be used to discover the actual
+ * output encoding displayed to the user; that is determined by the locale.
+ * TODO: it would be useful to be able to change the standard output
+ * encoding in the configuration file.
+ *
+ * This table is expected to change over time, particularly as man pages
+ * begin to move towards UTF-8. Feel free to patch this for your
+ * distribution; send me updates for languages I've missed.
+ *
+ * Explicit encodings in the directory name (e.g. de_DE.UTF-8) override this
+ * table.
+ */
+struct directory_entry {
+	const char *lang_dir;
+	const char *source_encoding;
+};
+
+static struct directory_entry directory_table[] = {
+	{ "C",		"ISO-8859-1"	}, /* English */
+	{ "POSIX",	"ISO-8859-1"	}, /* English */
+	{ "da",		"ISO-8859-1"	}, /* Danish */
+	{ "de",		"ISO-8859-1"	}, /* German */
+	{ "en",		"ISO-8859-1"	}, /* English */
+	{ "es",		"ISO-8859-1"	}, /* Spanish */
+	{ "et",		"ISO-8859-1"	}, /* Estonian */
+	{ "fi",		"ISO-8859-1"	}, /* Finnish */
+	{ "fr",		"ISO-8859-1"	}, /* French */
+	{ "ga",		"ISO-8859-1"	}, /* Irish */
+	{ "gl",		"ISO-8859-1"	}, /* Galician */
+	{ "id",		"ISO-8859-1"	}, /* Indonesian */
+	{ "is",		"ISO-8859-1"	}, /* Icelandic */
+	{ "it",		"ISO-8859-1"	}, /* Italian */
+	{ "nb",		"ISO-8859-1"	}, /* Norwegian Bokmål */
+	{ "nl",		"ISO-8859-1"	}, /* Dutch */
+	{ "nn",		"ISO-8859-1"	}, /* Norwegian Nynorsk */
+	{ "no",		"ISO-8859-1"	}, /* Norwegian */
+	{ "pt",		"ISO-8859-1"	}, /* Portuguese */
+	{ "sv",		"ISO-8859-1"	}, /* Swedish */
+
+#ifdef MULTIBYTE_GROFF
+	/* These languages require a patched version of groff with the
+	 * ascii8 and nippon devices.
+	 */
+	{ "be",		"CP1251"	}, /* Belarusian */
+	{ "bg",		"CP1251"	}, /* Bulgarian */
+	{ "cs",		"ISO-8859-2"	}, /* Czech */
+	{ "el",		"ISO-8859-7"	}, /* Greek */
+	{ "hr",		"ISO-8859-2"	}, /* Croatian */
+	{ "hu",		"ISO-8859-2"	}, /* Hungarian */
+	{ "ja",		"EUC-JP"	}, /* Japanese */
+	{ "ko",		"EUC-KR"	}, /* Korean */
+	{ "lt",		"ISO-8859-13"	}, /* Lithuanian */
+	{ "lv",		"ISO-8859-13"	}, /* Latvian */
+	{ "mk",		"ISO-8859-5"	}, /* Macedonian */
+	{ "pl",		"ISO-8859-2"	}, /* Polish */
+	{ "ro",		"ISO-8859-2"	}, /* Romanian */
+	{ "ru",		"KOI8-R"	}, /* Russian */
+	{ "sk",		"ISO-8859-2"	}, /* Slovak */
+	{ "sl",		"ISO-8859-2"	}, /* Slovenian */
+	/* sr@latin must precede sr, due to top-down left-substring matching later */
+	{ "sr@latin",	"ISO-8859-2"	}, /* Serbian Latin */
+	{ "sr",		"ISO-8859-5"	}, /* Serbian */
+	{ "tr",		"ISO-8859-9"	}, /* Turkish */
+	{ "uk",		"KOI8-U"	}, /* Ukrainian */
+	{ "vi",		"TCVN5712-1"	}, /* Vietnamese */
+	{ "zh_CN",	"GBK"		}, /* Simplified Chinese */
+	{ "zh_SG",	"GBK"		}, /* Simplified Chinese, Singapore */
+	{ "zh_HK",	"BIG5HKSCS"	}, /* Traditional Chinese, Hong Kong */
+	{ "zh_TW",	"BIG5"		}, /* Traditional Chinese */
+#endif /* MULTIBYTE_GROFF */
+
+	{ NULL,		NULL		}
+};
+
+static const char fallback_source_encoding[] = "ISO-8859-1";
+
+/* Unfortunately, there is no portable way to inspect iconv's internal table
+ * of character set aliases. We copy the most interesting ones here so that
+ * we can deal with them if they appear in directory names. Note that all
+ * names will be converted to upper case before looking them up in this
+ * table.
+ */
+struct charset_alias_entry {
+	const char *alias;
+	const char *canonical_name;
+};
+
+static struct charset_alias_entry charset_alias_table[] = {
+	/* The FHS is silly and requires numeric-only aliases that iconv
+	 * does not support.
+	 */
+	{ "88591",		"ISO-8859-1"		},
+	{ "88592",		"ISO-8859-2"		},
+	{ "88593",		"ISO-8859-3"		},
+	{ "88594",		"ISO-8859-4"		},
+	{ "88595",		"ISO-8859-5"		},
+	{ "88596",		"ISO-8859-6"		},
+	{ "88597",		"ISO-8859-7"		},
+	{ "88598",		"ISO-8859-8"		},
+	{ "88599",		"ISO-8859-9"		},
+	{ "885910",		"ISO-8859-10"		},
+	{ "885911",		"ISO-8859-11"		},
+	{ "885913",		"ISO-8859-13"		},
+	{ "885914",		"ISO-8859-14"		},
+	{ "885915",		"ISO-8859-15"		},
+	{ "885916",		"ISO-8859-16"		},
+
+	{ "ASCII",		"ANSI_X3.4-1968"	},
+	{ "BIG-5",		"BIG5"			},
+	{ "BIG5-HKSCS",		"BIG5HKSCS"		},
+	{ "EUCCN",		"EUC-CN"		},
+	{ "EUCJP",		"EUC-JP"		},
+	{ "EUCKR",		"EUC-KR"		},
+	{ "EUCTW",		"EUC-TW"		},
+	{ "GB2312",		"EUC-CN"		},
+	{ "ISO8859-1",		"ISO-8859-1"		},
+	{ "ISO8859-2",		"ISO-8859-2"		},
+	{ "ISO8859-3",		"ISO-8859-3"		},
+	{ "ISO8859-4",		"ISO-8859-4"		},
+	{ "ISO8859-5",		"ISO-8859-5"		},
+	{ "ISO8859-6",		"ISO-8859-6"		},
+	{ "ISO8859-7",		"ISO-8859-7"		},
+	{ "ISO8859-8",		"ISO-8859-8"		},
+	{ "ISO8859-9",		"ISO-8859-9"		},
+	{ "ISO8859-10",		"ISO-8859-10"		},
+	{ "ISO8859-11",		"ISO-8859-11"		},
+	{ "ISO8859-13",		"ISO-8859-13"		},
+	{ "ISO8859-14",		"ISO-8859-14"		},
+	{ "ISO8859-15",		"ISO-8859-15"		},
+	{ "ISO8859-16",		"ISO-8859-16"		},
+	{ "KOI8R",		"KOI8-R"		},
+	{ "KOI8U",		"KOI8-U"		},
+	{ "UJIS",		"EUC-JP"		},
+	{ "US-ASCII",		"ANSI_X3.4-1968"	},
+	{ "UTF8",		"UTF-8"			},
+
+	{ NULL,			NULL			}
+};
+
+/* The default groff terminal output device to be used is determined based
+ * on locale_charset (), which returns the character set used by the current
+ * locale.
+ */
+struct charset_entry {
+	const char *charset_from_locale;
+	const char *default_device;
+};
+
+static struct charset_entry charset_table[] = {
+	{ "ANSI_X3.4-1968",	"ascii"		},
+#ifndef HEIRLOOM_NROFF
+	{ "ISO-8859-1",		"latin1"	},
+#endif /* HEIRLOOM_NROFF */
+	{ "UTF-8",		"utf8"		},
+
+#ifndef HEIRLOOM_NROFF
+# ifdef MULTIBYTE_GROFF
+	{ "BIG5",		"nippon"	},
+	{ "BIG5HKSCS",		"nippon"	},
+	{ "EUC-CN",		"nippon"	},
+	{ "EUC-JP",		"nippon"	},
+	{ "EUC-TW",		"nippon"	},
+	{ "GBK",		"nippon"	},
+# else /* !MULTIBYTE_GROFF */
+	/* If we have a smarter version of groff, this is better dealt with
+	 * using either ascii8 (Debian multibyte patch) or preconv (as of
+	 * groff 1.20). This is a not-quite-right stopgap in case we have
+	 * neither.
+	 */
+	{ "ISO-8859-15",    	"latin1"	},
+# endif /* MULTIBYTE_GROFF */
+#endif /* HEIRLOOM_NROFF */
+
+	{ NULL,			NULL		}
+};
+
+static const char *fallback_default_device =
+#ifdef MULTIBYTE_GROFF
+	"ascii8"
+#else /* !MULTIBYTE_GROFF */
+	"ascii"
+#endif /* MULTIBYTE_GROFF */
+	;
+
+/* The encoding used for the text passed to groff is a function of the
+ * selected groff device. Traditional devices expect ISO-8859-1 on input
+ * (yes, even the utf8 device); devices added in the Debian multibyte patch
+ * expect other encodings. The ascii8 device passes top-bit-set characters
+ * straight through so is (probably ...) encoding-agnostic. If this encoding
+ * does not match the source encoding, an iconv pipe is used (if available)
+ * to perform recoding.
+ */
+struct device_entry {
+	const char *roff_device;
+	const char *roff_encoding;
+	const char *output_encoding;
+};
+
+static struct device_entry device_table[] = {
+	/* nroff devices */
+	{ "ascii",	"ANSI_X3.4-1968",	"ANSI_X3.4-1968"	},
+	{ "latin1",	"ISO-8859-1",		"ISO-8859-1"		},
+	{ "utf8",	"ISO-8859-1",		"UTF-8"			},
+
+#ifdef MULTIBYTE_GROFF
+	{ "ascii8",	NULL,			NULL			},
+	{ "nippon",	NULL,			NULL			},
+#endif /* MULTIBYTE_GROFF */
+
+#ifdef HEIRLOOM_NROFF
+	/* Not strictly accurate, but we only use this in UTF-8 locales. */
+	{ "locale",	"UTF-8",		"UTF-8"			},
+#endif /* HEIRLOOM_NROFF */
+
+	/* troff devices */
+	{ "X75",	NULL,			NULL			},
+	{ "X75-12",	NULL,			NULL			},
+	{ "X100",	NULL,			NULL			},
+	{ "X100-12",	NULL,			NULL			},
+	{ "dvi",	NULL,			NULL			},
+	{ "html",	NULL,			NULL			},
+	{ "lbp",	NULL,			NULL			},
+	{ "lj4",	NULL,			NULL			},
+	{ "ps",		NULL,			NULL			},
+
+	{ NULL,		NULL,			NULL			}
+};
+
+static const char fallback_roff_encoding[] = "ISO-8859-1";
+
+/* Setting less_charset to iso8859 tells the less pager that characters
+ * between 0xA0 and 0xFF are displayable, not that its input is encoded in
+ * ISO-8859-*. TODO: Perhaps using LESSCHARDEF would be better.
+ *
+ * Character set names compatible only with jless go in jless_charset.
+ */
+struct less_charset_entry {
+	const char *charset_from_locale;
+	const char *less_charset;
+	const char *jless_charset;
+};
+
+static struct less_charset_entry less_charset_table[] = {
+	{ "ANSI_X3.4-1968",	"ascii",	NULL		},
+	{ "ISO-8859-1",		"iso8859",	NULL		},
+	{ "UTF-8",		"utf-8",	NULL		},
+
+#ifdef MULTIBYTE_GROFF
+	{ "CP1251",		"windows",	NULL		},
+	{ "EUC-JP",		"iso8859",	"japanese-ujis"	},
+	{ "KOI8-R",		"koi8-r",	NULL		},
+	/* close enough? */
+	{ "KOI8-U",		"koi8-r",	NULL		},
+#endif /* MULTIBYTE_GROFF */
+
+	{ NULL,			NULL,		NULL		}
+};
+
+static const char fallback_less_charset[] = "iso8859";
+
+const char *groff_preconv = NULL;
+
+/* Is the groff "preconv" helper available? If so, return its name.
+ * Otherwise, return NULL.
+ */
+const char *get_groff_preconv (void)
+{
+	if (groff_preconv) {
+		if (*groff_preconv)
+			return groff_preconv;
+		else
+			return NULL;
+	}
+
+	if (pathsearch_executable ("gpreconv"))
+		groff_preconv = "gpreconv";
+	else if (pathsearch_executable ("preconv"))
+		groff_preconv = "preconv";
+	else
+		groff_preconv = "";
+
+	if (*groff_preconv)
+		return groff_preconv;
+	else
+		return NULL;
+}
+
+/* Return the assumed encoding of the source man page, based on the
+ * directory in which it was found. The caller should attempt to recode from
+ * this to whatever encoding is expected by groff.
+ *
+ * The caller should free the returned string when it is finished with it.
+ */
+char * ATTRIBUTE_MALLOC get_page_encoding (const char *lang)
+{
+	const struct directory_entry *entry;
+	const char *dot;
+
+	if (!lang || !*lang) {
+		/* Guess based on the locale. */
+		lang = setlocale (LC_MESSAGES, NULL);
+		if (!lang)
+			return xstrdup (fallback_source_encoding);
+	}
+
+	dot = strchr (lang, '.');
+	if (dot) {
+		/* The FHS has the worst specification of what's supposed to
+		 * go after the dot here that I've ever seen. To quote from
+		 * version 2.1:
+		 *
+		 * "It is recommended that this be a numeric representation
+		 * if possible (ISO standards, especially), not include
+		 * additional punctuation symbols, and that any letters be
+		 * in lowercase."
+		 *
+		 * Any sane standard would use directory names like
+		 * de_DE.ISO-8859-1; the examples in the FHS recommend
+		 * de_DE.88591 instead. Considering that there is no other
+		 * conceivable use for encodings in directory names other
+		 * than to pass them to iconv or similar, this is quite
+		 * startlingly useless.
+		 *
+		 * While we now support this thanks to
+		 * get_canonical_charset_name, the FHS specification is
+		 * obviously wrong and I plan to petition to have it
+		 * changed. I recommend ignoring this part of the FHS.
+		 */
+		char *dir_encoding =
+			xstrndup (dot + 1, strcspn (dot + 1, ",@"));
+		char *canonical_dir_encoding =
+			xstrdup (get_canonical_charset_name (dir_encoding));
+		free (dir_encoding);
+		return canonical_dir_encoding;
+	}
+
+	for (entry = directory_table; entry->lang_dir; ++entry)
+		if (STRNEQ (entry->lang_dir, lang, strlen (entry->lang_dir)))
+			return xstrdup (entry->source_encoding);
+
+	return xstrdup (fallback_source_encoding);
+}
+
+/* Return the canonical encoding for source man pages in the specified
+ * language. This ignores any encoding specification in the language
+ * directory name. The source encoding should be used as a basis for
+ * determining the correct roff device to use: that is, the caller should
+ * behave as if it is recoding from the page encoding to the source encoding
+ * first, although in practice it should recode directly from the page
+ * encoding to the roff encoding.
+ *
+ * You should normally only call this function if the page encoding is
+ * UTF-8, in which case older versions of groff that lack preconv need to
+ * have the page recoded to some legacy encoding). If the page is in a
+ * legacy encoding, then attempting to recode from that to some other legacy
+ * encoding will probably do more harm than good.
+ *
+ * Here are a few concrete examples of why these distinctions are important:
+ *
+ *   /usr/share/man/en_GB.UTF-8, locale C
+ *     page encoding = UTF-8
+ *     source encoding = ISO-8859-1
+ *     roff encoding = ISO-8859-1
+ *     output encoding = UTF-8
+ *     UTF-8 -> iconv -> ISO-8859-1 -> groff -Tascii -> ANSI_X3.4-1968
+ *
+ *   /usr/share/man/pl_PL.UTF-8, locale pl_PL.UTF-8
+ *     page encoding = UTF-8
+ *     source encoding = ISO-8859-2
+ *     roff encoding = ISO-8859-2
+ *     output encoding = ISO-8859-2
+ *     UTF-8 -> iconv -> ISO-8859-2 -> groff -Tascii8
+ *                    -> ISO-8859-2 -> iconv -> UTF-8
+ *
+ *   /usr/share/man/ja_JP.EUC-JP, locale ja_JP.UTF-8
+ *     page encoding = EUC-JP
+ *     source encoding = EUC-JP
+ *     roff encoding = UTF-8
+ *     output encoding = UTF-8
+ *     EUC-JP -> iconv -> UTF-8 -> groff -Tutf8 -> UTF-8
+ *
+ *   /usr/share/man/en_GB.ISO-8859-15, locale en_GB.UTF-8
+ *     page encoding = ISO-8859-15
+ *     source encoding = ISO-8859-15
+ *     roff encoding = ISO-8859-15
+ *     output encoding = ISO-8859-15
+ *     ISO-8859-15 -> groff -Tascii8 -> ISO-8859-15 -> iconv -> UTF-8
+ */
+const char *get_source_encoding (const char *lang)
+{
+	const struct directory_entry *entry;
+
+	if (!lang || !*lang) {
+		/* Guess based on the locale. */
+		lang = setlocale (LC_MESSAGES, NULL);
+		if (!lang)
+			return fallback_source_encoding;
+	}
+
+	for (entry = directory_table; entry->lang_dir; ++entry)
+		if (STRNEQ (entry->lang_dir, lang, strlen (entry->lang_dir)))
+			return entry->source_encoding;
+
+	return fallback_source_encoding;
+}
+
+const char * ATTRIBUTE_NONNULL ((1)) ATTRIBUTE_RETURNS_NONNULL
+	get_canonical_charset_name (const char *charset)
+{
+	const struct charset_alias_entry *entry;
+	char *charset_upper = xstrdup (charset);
+	char *p;
+
+	for (p = charset_upper; *p; ++p)
+		*p = CTYPE (toupper, *p);
+
+	for (entry = charset_alias_table; entry->alias; ++entry)
+		if (STREQ (entry->alias, charset_upper)) {
+			free (charset_upper);
+			return entry->canonical_name;
+		}
+
+	free (charset_upper);
+	return charset;
+}
+
+/* Return the current locale's character set. */
+const char * ATTRIBUTE_RETURNS_NONNULL get_locale_charset (void)
+{
+	const char *charset;
+	char *saved_locale;
+
+	/* We need to modify LC_CTYPE temporarily in order to look at the
+	 * codeset, so save it first.
+	 */
+	saved_locale = setlocale (LC_CTYPE, NULL);
+	if (saved_locale)
+		saved_locale = xstrdup (saved_locale);
+
+	setlocale (LC_CTYPE, "");
+
+	charset = locale_charset ();
+
+	/* Restore LC_CTYPE to its value on entry to this function. */
+	setlocale (LC_CTYPE, saved_locale);
+	free (saved_locale);
+
+	if (!charset || !*charset)
+		charset = "ANSI_X3.4-1968";
+	return get_canonical_charset_name (charset);
+}
+
+/* Find a locale with this character set. This is a non-portable operation,
+ * but required to make col(1) work correctly with -E. If no locale can be
+ * found, or if none needs to be set, return NULL.
+ *
+ * The caller should free the returned string when it is finished with it.
+ */
+char *find_charset_locale (const char *charset)
+{
+	const char *canonical_charset = get_canonical_charset_name (charset);
+	char *saved_locale;
+	const char supported_path[] = "/usr/share/i18n/SUPPORTED";
+	FILE *supported = NULL;
+	char *line = NULL;
+	size_t n = 0;
+	char *locale = NULL;
+
+	if (STREQ (charset, get_locale_charset ()))
+		return NULL;
+
+	saved_locale = setlocale (LC_CTYPE, NULL);
+	if (saved_locale)
+		saved_locale = xstrdup (saved_locale);
+
+	supported = fopen (supported_path, "r");
+	while (supported && getline (&line, &n, supported) >= 0) {
+		const char *space = strchr (line, ' ');
+		if (space) {
+			char *encoding = xstrdup (space + 1);
+			char *newline = strchr (encoding, '\n');
+			if (newline)
+				*newline = 0;
+			if (STREQ (canonical_charset,
+				   get_canonical_charset_name (encoding))) {
+				locale = xstrndup (line, space - line);
+				/* Is this locale actually installed? */
+				if (setlocale (LC_CTYPE, locale)) {
+					free (encoding);
+					goto out;
+				} else {
+					free (locale);
+					locale = NULL;
+				}
+			}
+			free (encoding);
+		}
+		free (line);
+		line = NULL;
+	}
+
+	if (strlen (canonical_charset) >= 5 &&
+	    STRNEQ (canonical_charset, "UTF-8", 5)) {
+		locale = xstrdup ("C.UTF-8");
+		if (setlocale (LC_CTYPE, locale))
+			goto out;
+		free (locale);
+		locale = xstrdup ("en_US.UTF-8");
+		if (setlocale (LC_CTYPE, locale))
+			goto out;
+		free (locale);
+		locale = NULL;
+	}
+
+out:
+	free (line);
+	setlocale (LC_CTYPE, saved_locale);
+	free (saved_locale);
+	if (supported)
+		fclose (supported);
+	return locale;
+}
+
+/* Can we take this input encoding and produce this output encoding, perhaps
+ * with the help of some iconv pipes? */
+static bool ATTRIBUTE_PURE compatible_encodings (const char *input,
+						 const char *output)
+{
+	if (STREQ (input, output))
+		return true;
+
+	/* If the input is ASCII, recoding should be easy. Try it. */
+	if (STREQ (input, "ANSI_X3.4-1968"))
+		return true;
+
+	/* If the input is UTF-8, it's either a simple recoding of whatever
+	 * we want or else it probably won't work at all no matter what we
+	 * do. We might as well try it for now.
+	 */
+	if (STREQ (input, "UTF-8"))
+		return true;
+
+	/* If the output is ASCII, this is probably because the caller
+	 * explicitly asked for it, so we have little choice but to try.
+	 */
+	if (STREQ (output, "ANSI_X3.4-1968"))
+		return true;
+
+#ifdef MULTIBYTE_GROFF
+	/* Special case for some CJK UTF-8 locales, which take UTF-8 input
+	 * recoded from EUC-JP (etc.) and produce UTF-8 output. This is
+	 * rather filthy.
+	 */
+	if ((STREQ (input, "BIG5") || STREQ (input, "BIG5HKSCS") ||
+	     STREQ (input, "EUC-JP") ||
+	     STREQ (input, "EUC-CN") || STREQ (input, "GBK") ||
+	     STREQ (input, "EUC-KR") ||
+	     STREQ (input, "EUC-TW")) &&
+	    STREQ (output, "UTF-8"))
+		return true;
+#endif /* MULTIBYTE_GROFF */
+
+	return false;
+}
+
+/* Return the default groff device for the given character set. This may be
+ * overridden by the user. The page's source encoding is needed to ensure
+ * that the device is compatible: consider ru_RU.UTF-8, which needs ascii8
+ * and a trailing iconv pipe to recode to UTF-8.
+ *
+ * All this encoding compatibility stuff feels like a slightly nasty hack,
+ * but I haven't yet come up with a cleaner way to do it.
+ */
+const char *get_default_device (const char *charset_from_locale,
+				const char *source_encoding)
+{
+	const struct charset_entry *entry;
+
+	if (get_groff_preconv ()) {
+		/* ASCII is a special case, and the only way we can get
+		 * things like bullet marks to come out right is by using
+		 * the ascii device. People using such a basic locale
+		 * probably don't want anything fancy anyway.
+		 */
+		if (charset_from_locale &&
+		    STREQ (charset_from_locale, "ANSI_X3.4-1968"))
+			return "ascii";
+		else
+			return "utf8";
+	}
+
+	if (!charset_from_locale)
+		return fallback_default_device;
+
+	for (entry = charset_table; entry->charset_from_locale; ++entry) {
+		if (STREQ (entry->charset_from_locale, charset_from_locale)) {
+			const char *roff_encoding =
+				get_roff_encoding (entry->default_device,
+						   source_encoding);
+			if (compatible_encodings (source_encoding,
+						  roff_encoding))
+				return entry->default_device;
+		}
+	}
+
+	return fallback_default_device;
+}
+
+/* Is this a known *roff device name? */
+bool ATTRIBUTE_PURE is_roff_device (const char *device)
+{
+	const struct device_entry *entry;
+
+	for (entry = device_table; entry->roff_device; ++entry) {
+		if (STREQ (entry->roff_device, device))
+			return true;
+	}
+
+	return false;
+}
+
+/* Find the input encoding expected by groff, and set the LESSCHARSET
+ * environment variable appropriately.
+ */
+const char *get_roff_encoding (const char *device, const char *source_encoding)
+{
+	const struct device_entry *entry;
+	bool found = false;
+	const char *roff_encoding = NULL;
+
+	if (device) {
+		for (entry = device_table; entry->roff_device; ++entry) {
+			if (STREQ (entry->roff_device, device)) {
+				found = true;
+				roff_encoding = entry->roff_encoding;
+				break;
+			}
+		}
+	}
+
+	if (!found)
+		roff_encoding = fallback_roff_encoding;
+
+#ifdef MULTIBYTE_GROFF
+	/* An ugly special case is needed here. The utf8 device normally
+	 * takes ISO-8859-1 input. However, with the multibyte patch, when
+	 * recoding from CJK character sets it takes UTF-8 input instead.
+	 * This is evil, but there's not much that can be done about it
+	 * apart from waiting for groff 2.0.
+	 */
+	if (device && STREQ (device, "utf8") && !get_groff_preconv () &&
+	    STREQ (get_locale_charset (), "UTF-8")) {
+		const char *ctype = setlocale (LC_CTYPE, NULL);
+		if (STRNEQ (ctype, "ja_JP", 5) ||
+		    STRNEQ (ctype, "ko_KR", 5) ||
+		    STRNEQ (ctype, "zh_CN", 5) ||
+		    STRNEQ (ctype, "zh_HK", 5) ||
+		    STRNEQ (ctype, "zh_SG", 5) ||
+		    STRNEQ (ctype, "zh_TW", 5))
+			roff_encoding = "UTF-8";
+	}
+#endif /* MULTIBYTE_GROFF */
+
+	return roff_encoding ? roff_encoding : source_encoding;
+}
+
+/* Find the output encoding that this device will produce, or NULL if it
+ * will simply pass through the input encoding.
+ */
+const char * ATTRIBUTE_PURE get_output_encoding (const char *device)
+{
+	const struct device_entry *entry;
+
+	for (entry = device_table; entry->roff_device; ++entry)
+		if (STREQ (entry->roff_device, device))
+			return entry->output_encoding;
+
+	return NULL;
+}
+
+/* Return the value of LESSCHARSET appropriate for this locale. */
+const char * ATTRIBUTE_PURE get_less_charset (const char *charset_from_locale)
+{
+	const struct less_charset_entry *entry;
+
+	if (charset_from_locale) {
+		for (entry = less_charset_table; entry->charset_from_locale;
+		     ++entry)
+			if (STREQ (entry->charset_from_locale,
+				   charset_from_locale))
+				return entry->less_charset;
+	}
+
+	return fallback_less_charset;
+}
+
+/* Return the value of JLESSCHARSET appropriate for this locale. May return
+ * NULL.
+ */
+const char * ATTRIBUTE_PURE get_jless_charset (const char *charset_from_locale)
+{
+	const struct less_charset_entry *entry;
+
+	if (charset_from_locale) {
+		for (entry = less_charset_table; entry->charset_from_locale;
+		     ++entry)
+			if (STREQ (entry->charset_from_locale,
+				   charset_from_locale))
+				return entry->jless_charset;
+	}
+
+	return NULL;
+}
diff --git a/lib/encodings.h b/lib/encodings.h
new file mode 100644
index 0000000..6de48f7
--- /dev/null
+++ b/lib/encodings.h
@@ -0,0 +1,38 @@
+/*
+ * encodings.h: Interface to locale and encoding handling for man
+ *
+ * Copyright (C) 2003, 2004, 2006, 2007, 2008 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <stdbool.h>
+
+const char *get_groff_preconv (void);
+char *get_page_encoding (const char *lang);
+const char *get_source_encoding (const char *lang);
+const char *get_canonical_charset_name (const char *charset);
+const char *get_locale_charset (void);
+char *find_charset_locale (const char *charset);
+const char *get_default_device (const char *locale_charset,
+				const char *source_encoding);
+bool is_roff_device (const char *device);
+const char *get_roff_encoding (const char *device,
+			       const char *source_encoding);
+const char *get_output_encoding (const char *device);
+const char *get_less_charset (const char *locale_charset);
+const char *get_jless_charset (const char *locale_charset);
diff --git a/lib/fatal.c b/lib/fatal.c
new file mode 100644
index 0000000..b2b7895
--- /dev/null
+++ b/lib/fatal.c
@@ -0,0 +1,48 @@
+/*
+ * fatal.c: fatal error helper
+ *
+ * Copyright (C) 2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "verror.h"
+
+#include "manconfig.h"
+
+#include "fatal.h"
+
+void fatal (int errnum, const char *format, ...)
+{
+	va_list ap;
+
+	va_start (ap, format);
+	verror (FATAL, errnum, format, ap);
+	va_end (ap);
+
+	/* Never reached, because verror exits if given a non-zero status,
+	 * but the compiler may not be able to prove that.
+	 */
+	abort ();
+}
diff --git a/lib/fatal.h b/lib/fatal.h
new file mode 100644
index 0000000..7cc299e
--- /dev/null
+++ b/lib/fatal.h
@@ -0,0 +1,26 @@
+/*
+ * fatal.h: interface to fatal error helper
+ *
+ * Copyright (C) 2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "attribute.h"
+
+_Noreturn void fatal (int errnum, const char *format, ...)
+	ATTRIBUTE_FORMAT ((__printf__, 2, 3));
diff --git a/lib/filenames.c b/lib/filenames.c
new file mode 100644
index 0000000..5e592c3
--- /dev/null
+++ b/lib/filenames.c
@@ -0,0 +1,165 @@
+/*
+ * filenames.c: compose and dissect man page file names
+ *
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "dirname.h"
+#include "error.h"
+#include "xalloc.h"
+#include "xvasprintf.h"
+
+#include "gettext.h"
+#define _(String) gettext (String)
+
+#include "manconfig.h"
+
+#include "appendstr.h"
+#include "compression.h"
+#include "debug.h"
+#include "filenames.h"
+
+static void gripe_bogus_manpage (const char *manpage)
+{
+	error (0, 0, _("warning: %s: ignoring bogus filename"), manpage);
+}
+
+char *make_filename (const char *path, const char *name,
+		     struct mandata *in, const char *type)
+{
+	static char *file;
+
+	if (!name)
+		name = in->name;    /* comes from dblookup(), so non-NULL */
+
+	file = xasprintf ("%s/%s%s/%s.%s", path, type, in->sec, name, in->ext);
+
+	if (in->comp && *in->comp != '-')	/* Is there an extension? */
+		file = appendstr (file, ".", in->comp, (void *) 0);
+
+	debug ("Checking physical location: %s\n", file);
+	if (!CAN_ACCESS (file, R_OK)) {
+		free (file);
+		return NULL;
+	}
+
+	return file;
+}
+
+/* Fill in a mandata structure with information about a file name.
+ * file is the name to examine. info points to the structure to be filled
+ * in.
+ *
+ * Returns either a pointer to the buffer which the fields in info point
+ * into, to be freed by the caller, or NULL on error. The buffer will
+ * contain either three or four null-terminated strings: the directory name,
+ * the base of the file name in that directory, the section extension, and
+ * optionally the compression extension.
+ *
+ * Only the fields name, ext, sec, and comp are filled in by this function.
+ */
+struct mandata *filename_info (const char *file, bool warn_if_bogus)
+{
+	struct mandata *info;
+	char *basename, *dirname;
+	struct compression *comp;
+
+	info = XZALLOC (struct mandata);
+
+	basename = base_name (file);
+
+	/* Bogus files either have (i) no period, ie no extension, (ii)
+	   a compression extension, but no sectional extension, (iii)
+	   a missmatch between the section they are under and the
+	   sectional part of their extension. */
+
+	comp = comp_info (basename, true);
+	if (comp) {
+		info->comp = xstrdup (comp->ext);
+		*(basename + strlen (comp->stem)) = '\0';
+		free (comp->stem);
+	} else
+		info->comp = NULL;
+
+	{
+		char *ext = strrchr (basename, '.');
+		if (!ext) {
+			/* no section extension */
+			if (warn_if_bogus)
+				gripe_bogus_manpage (file);
+			free (basename);
+			free_mandata_struct (info);
+			return NULL;
+		}
+		*ext++ = '\0';			/* set section ext */
+		info->ext = xstrdup (ext);
+		if (!*info->ext) {
+			/* zero-length section extension */
+			if (warn_if_bogus)
+				gripe_bogus_manpage (file);
+			free (basename);
+			free_mandata_struct (info);
+			return NULL;
+		}
+	}
+
+	/* Set section name. */
+	dirname = dir_name (file);
+	info->sec = xstrdup (strrchr (dirname, '/') + 4);
+	free (dirname);
+
+	if (strlen (info->sec) >= 1 && strlen (info->ext) >= 1 &&
+	    info->sec[0] != info->ext[0]) {
+		/* mismatch in section */
+		if (warn_if_bogus)
+			gripe_bogus_manpage (file);
+		free (basename);
+		free_mandata_struct (info);
+		return NULL;
+	}
+
+	info->name = xstrdup (basename);
+
+	return info;
+}
+
+/* Free a mandata structure and its elements. */
+void free_mandata_struct (struct mandata *pinfo)
+{
+	if (pinfo) {
+		free (pinfo->name);
+		free (pinfo->ext);
+		free (pinfo->sec);
+		free (pinfo->pointer);
+		free (pinfo->comp);
+		free (pinfo->filter);
+		free (pinfo->whatis);
+	}
+	free (pinfo);
+}
diff --git a/lib/filenames.h b/lib/filenames.h
new file mode 100644
index 0000000..66bc48a
--- /dev/null
+++ b/lib/filenames.h
@@ -0,0 +1,56 @@
+/*
+ * filenames.h: Interface to composing and dissecting man page file names
+ *
+ * Copyright (C) 2001-2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef MAN_FILENAMES_H
+#define MAN_FILENAMES_H
+
+#include <stdbool.h>
+
+#include "timespec.h"
+
+struct mandata {
+	/* Name of page, if not equal to the key. */
+	char *name;
+	/* Filename extension without compression extension. */
+	char *ext;
+	/* Section name/number. */
+	char *sec;
+	/* ID (i.e. type) of this entry. */
+	char id;
+	/* ID-related file pointer. */
+	char *pointer;
+	/* Compression extension. */
+	char *comp;
+	/* Filters needed for the page. */
+	char *filter;
+	/* Whatis description for the page. */
+	char *whatis;
+	/* Modification time for file. */
+	struct timespec mtime;
+};
+
+extern char *make_filename (const char *path, const char *name,
+			    struct mandata *in, const char *type);
+extern struct mandata *filename_info (const char *file, bool warn_if_bogus);
+extern void free_mandata_struct (struct mandata *pinfo);
+
+#endif /* MAN_FILENAMES_H */
diff --git a/lib/glcontainers.c b/lib/glcontainers.c
new file mode 100644
index 0000000..4cbe4ba
--- /dev/null
+++ b/lib/glcontainers.c
@@ -0,0 +1,78 @@
+/*
+ * glcontainers.c: common Gnulib container helpers
+ *
+ * Copyright (C) 2019 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "attribute.h"
+#include "gl_xlist.h"
+#include "gl_xmap.h"
+#include "gl_xset.h"
+#include "hash-pjw-bare.h"
+
+#include "manconfig.h"
+
+#include "glcontainers.h"
+
+bool ATTRIBUTE_PURE string_equals (const void *s1, const void *s2)
+{
+	return STREQ ((const char *) s1, (const char *) s2);
+}
+
+size_t ATTRIBUTE_PURE string_hash (const void *s)
+{
+	return hash_pjw_bare (s, strlen ((const char *) s));
+}
+
+void plain_free (const void *s)
+{
+	/* gl_list declares the argument as const, but there doesn't seem to
+	 * be a good reason for this.
+	 */
+	free ((void *) s);
+}
+
+gl_list_t new_string_list (gl_list_implementation_t implementation,
+			   bool allow_duplicates)
+{
+	return gl_list_create_empty (implementation, string_equals,
+				     string_hash, plain_free,
+				     allow_duplicates);
+}
+
+gl_map_t new_string_map (gl_map_implementation_t implementation,
+			 gl_mapvalue_dispose_fn vdispose_fn)
+{
+	return gl_map_create_empty (implementation, string_equals, string_hash,
+				    plain_free, vdispose_fn);
+}
+
+gl_set_t new_string_set (gl_set_implementation_t implementation)
+{
+	return gl_set_create_empty (implementation, string_equals, string_hash,
+				    plain_free);
+}
diff --git a/lib/glcontainers.h b/lib/glcontainers.h
new file mode 100644
index 0000000..56ae099
--- /dev/null
+++ b/lib/glcontainers.h
@@ -0,0 +1,68 @@
+/*
+ * glcontainers.h: interface to common Gnulib container helpers
+ *
+ * Copyright (C) 2019 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef MAN_GLCONTAINERS_H
+#define MAN_GLCONTAINERS_H
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#include "gl_list.h"
+#include "gl_map.h"
+#include "gl_set.h"
+
+#include "mp.h"
+
+/* These types are compatible with those required by Gnulib container
+ * initialisation.
+ */
+
+bool string_equals (const void *s1, const void *s2);
+size_t string_hash (const void *s);
+void plain_free (const void *s);
+
+/* Convenience functions. */
+
+gl_list_t new_string_list (gl_list_implementation_t implementation,
+			   bool allow_duplicates);
+gl_map_t new_string_map (gl_map_implementation_t implementation,
+			 gl_mapvalue_dispose_fn vdispose_fn);
+gl_set_t new_string_set (gl_set_implementation_t implementation);
+
+/* Iterator macros. */
+
+#define GL_LIST_FOREACH(list, item) \
+    MPP_DECLARE (1, gl_list_iterator_t list##_iter = gl_list_iterator (list)) \
+    MPP_DECLARE (2, gl_list_node_t list##_node) \
+    MPP_WHILE (3, gl_list_iterator_next (&list##_iter, \
+                                         (const void **) &item, \
+                                         &list##_node)) \
+    MPP_FINALLY (4, gl_list_iterator_free (&list##_iter))
+
+#define GL_MAP_FOREACH(map, key, value) \
+    MPP_DECLARE (1, gl_map_iterator_t map##_iter = gl_map_iterator (map)) \
+    MPP_WHILE (2, gl_map_iterator_next (&map##_iter, \
+                                        (const void **) &key, \
+                                        (const void **) &value)) \
+    MPP_FINALLY (3, gl_map_iterator_free (&map##_iter))
+
+#endif /* MAN_GLCONTAINERS_H */
diff --git a/lib/linelength.c b/lib/linelength.c
new file mode 100644
index 0000000..875000d
--- /dev/null
+++ b/lib/linelength.c
@@ -0,0 +1,110 @@
+/*
+ * linelength.c: find the terminal line length
+ * Preferences: 1. MANWIDTH, 2. COLUMNS, 3. ioctl, 4. 80
+ *
+ * Originally adapted from Andries Brouwer's man implementation, also
+ * released under the GPL: authors believed to include Martin Schulze and
+ * Jon Tombs, dated 1995/09/02.
+ *
+ * Changes for man-db copyright (C) 2001, 2003, 2007 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "linelength.h"
+
+#ifndef _PATH_TTY
+# define _PATH_TTY "/dev/tty"
+#endif /* _PATH_TTY */
+
+static int line_length = -1;
+
+int get_line_length (void)
+{
+	const char *columns;
+	int width;
+#ifdef TIOCGWINSZ
+	int dev_tty, tty_fd = -1;
+#endif
+
+	if (line_length != -1)
+		return line_length;
+
+	line_length = 80;
+
+	columns = getenv ("MANWIDTH");
+	if (columns != NULL) {
+		width = atoi (columns);
+		if (width > 0)
+			return line_length = width;
+	}
+
+	columns = getenv ("COLUMNS");
+	if (columns != NULL) {
+		width = atoi (columns);
+		if (width > 0)
+			return line_length = width;
+	}
+
+#ifdef TIOCGWINSZ
+	/* Original TIOCGWINSZ approach was from Jon Tombs.
+	 * We don't require both stdin and stdout to be a tty, and line
+	 * length is primarily a property of output. However, if it happens
+	 * that stdin is connected to a terminal but stdout isn't, then that
+	 * may well be because the user is trying something like
+	 * 'MAN_KEEP_STDERR=1 man foo >/dev/null' to see just the error
+	 * messages, so use the window size from stdin as a fallback.
+	 * In some cases we may have neither (e.g. if man is running inside
+	 * lesspipe); /dev/tty should be a reliable way to get to the
+	 * current tty if it exists.
+	 */
+	dev_tty = open (_PATH_TTY, O_RDONLY);
+	if (dev_tty >= 0)
+		tty_fd = dev_tty;
+	else if (isatty (STDOUT_FILENO))
+		tty_fd = STDOUT_FILENO;
+	else if (isatty (STDIN_FILENO))
+		tty_fd = STDIN_FILENO;
+	if (tty_fd >= 0) {
+		int ret;
+		struct winsize wsz;
+
+		ret = ioctl (tty_fd, TIOCGWINSZ, &wsz);
+		if (dev_tty >= 0)
+			close (dev_tty);
+		if (ret)
+			perror ("TIOCGWINSZ failed");
+		else if (wsz.ws_col)
+			return line_length = wsz.ws_col;
+	}
+#endif
+
+	return line_length = 80;
+}
diff --git a/lib/linelength.h b/lib/linelength.h
new file mode 100644
index 0000000..49d958f
--- /dev/null
+++ b/lib/linelength.h
@@ -0,0 +1,23 @@
+/*
+ * linelength.h: interface to find the terminal line length
+ *
+ * Copyright (C) 2007 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+
+int get_line_length (void);
diff --git a/lib/mp.h b/lib/mp.h
new file mode 100644
index 0000000..df31eae
--- /dev/null
+++ b/lib/mp.h
@@ -0,0 +1,483 @@
+/*
+ * mp.h: header file providing macros for 'metaprogramming' custom
+ * loop constructions in standard C.
+ *
+ * Accompanies the article on the web at
+ *   https://www.chiark.greenend.org.uk/~sgtatham/mp/
+ */
+
+/*
+ * mp.h is copyright 2012 Simon Tatham.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT.  IN NO EVENT SHALL SIMON TATHAM BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * $Id$
+ */
+
+/*
+ * Macros beginning with 'MPI_' are internal to this header file, and
+ * intended only to be used by other macros defined _in_ this header
+ * file. Do not refer to them externally.
+ */
+
+/* Standard trickery to allow us to macro-expand and then token-paste */
+#define MPI_TOKPASTEINNER(x,y) x ## y
+#define MPI_TOKPASTE(x,y) MPI_TOKPASTEINNER(x,y)
+
+/* Method of constructing line-unique labels */
+#define MPI_LABEL(id1,id2)                                      \
+    MPI_TOKPASTE(MPI_LABEL_ ## id1 ## _ ## id2 ## _, __LINE__)
+
+/*
+ * Macros beginning with 'MPP_' and 'MPS_' are building blocks
+ * intended for metaprogrammers to make useful control constructions
+ * from.
+ *
+ * The prefixes distinguish their syntactic role. MPP_ macros are
+ * statement _prefixes_; you would typically build a custom control
+ * structure by defining a macro expanding to a sequence of them. MPS_
+ * macros are actual statements, which you might use in the various
+ * parameters of MPP_ macros that are expected to be statement-shaped.
+ */
+
+/*
+ * Safety considerations:
+ *
+ *  - All of these macros are C89-safe, except for MPP_DECLARE if you
+ *    pass an actual declaration and not just an assignment, since
+ *    that one relies on the C99 (and C++) extension of being able to
+ *    write a declaration in the initialisation clause of a for
+ *    statement.
+ *
+ *  - None of these macros uses switch, so case labels from a switch
+ *    outside the whole lot may be written inside the suffixed
+ *    statement/block.
+ *
+ *  - All of these constructions use 'goto' with labels constructed
+ *    programmatically, using __LINE__ to make them unique between
+ *    multiple invocations of the same loop macro. So don't put two
+ *    loop macros defined using these building blocks on the same
+ *    source line.
+ *
+ *  - All of these constructions can be prefixed to something that is
+ *    syntactically a single C statement, and generate something that
+ *    is also a single C statement. So they're if-else safe - you can
+ *    use an unbraced one of these constructs followed by an unbraced
+ *    statement within the then-clause of an outer if, and the else
+ *    will still bind to what it looks as if it ought to.
+ *
+ *  - Controlling what happens if the user writes a 'break' in the
+ *    suffixed statement is unavoidably rather fiddly. The macros
+ *    below fall into a few categories:
+ *
+ *     + naturally transparent to 'break' (MPP_BEFORE, MPP_IF). Macros
+ *       of this type will not affect the semantics of 'break' in the
+ *       suffixed statement at all - it will terminate the next
+ *       innermost loop or switch outside the construction.
+ *
+ *     + artificially transparent to 'break', by means of deliberately
+ *       catching and 'rethrowing' it. (MPP_BREAK_{THROW,CATCH};
+ *       MPP_BREAK_HANDLER; MPP_FINALLY.) These macros will propagate
+ *       a break outwards to the next containing loop, but in order to
+ *       do so they require that there _be_ a next containing loop,
+ *       since their expansion can't avoid including a break statement
+ *       which they themselves do not wrap in a loop. So you should
+ *       only use these when you know there is a containing loop (e.g.
+ *       because MPP_WHILE or MPP_DO_WHILE precedes them in your
+ *       construction).
+ *
+ *     + loop constructions. (MPP_WHILE and MPP_DO_WHILE). These
+ *       macros give 'break' the obvious semantics of terminating the
+ *       loop they define.
+ *
+ *     + break-unsafe macros, which have to include a C looping
+ *       construction to do something not essentially loopy, and hence
+ *       have the unfortunate side effect of causing 'break' to only
+ *       terminate the suffixed statement itself. On the other hand,
+ *       they can be used in contexts where there is no surrounding
+ *       loop at all (which is why I don't just fix them to contain a
+ *       built-in MPP_BREAK_{THROW,CATCH}).
+ *
+ *    If you are using these macros to build a looping construct, then
+ *    you will probably include an MPP_WHILE or MPP_DO_WHILE in your
+ *    stack, and you'll want 'break' to terminate that. So you just
+ *    need to be sure that break is correctly propagated from the
+ *    suffixed statement back to that loop, which you can do by
+ *    sticking to the break-transparent macros where possible and
+ *    using MPP_BREAK_{THROW,CATCH} to bypass any break-unsafe macro
+ *    such as MPP_DECLARE that you might need to use. Having done
+ *    that, 'break' will do what the user expects.
+ *
+ *    But if you're using the macros to wrap some context around a
+ *    statement you still intend to be executed only once, there will
+ *    be unavoidable side effects on 'break': you can't use the
+ *    artificially break-unsafe macros because the user might use your
+ *    construction in a context with no surrounding loop at all, so
+ *    you must stick to the naturally break-transparent and the
+ *    break-unsafe, and there aren't enough of the former to be really
+ *    useful. So you must just live with 'break' acquiring unhelpful
+ *    behaviour inside such a macro.
+ *
+ *  - Almost none of these macros is transparent to 'continue'. The
+ *    naturally break-transparent MPP_BEFORE is, but none of the rest
+ *    can possibly be, because as soon as you include any loop
+ *    construction in the stuff being prefixed to a statement, you
+ *    introduce the invariant that 'continue' is equivalent to jumping
+ *    to the end of the suffixed statement or block. This is not too
+ *    bad if you're defining a custom loop construction (it was quite
+ *    likely the behaviour you wanted for continue anyway), but if you
+ *    were trying to use MPP_DECLARE and/or MPP_BEFORE_AND_AFTER to
+ *    wrap a statement in some context but still only execute it once,
+ *    you'd have to be aware of that limitation.
+ *
+ *  - MPP_FINALLY and MPP_BREAK_HANDLER can only catch non-local exits
+ *    from the block _by break_. They are not true C++ try/finally, so
+ *    they can't catch other kinds of exit such as return, goto,
+ *    longjmp or exit.
+ *
+ *  - Finally, it almost goes without saying, but don't forget that
+ *    snippets of code you use as parameters to these macros must
+ *    avoid using commas not contained inside parentheses, or else the
+ *    C preprocessor will consider the comma to end that macro
+ *    parameter and start the next one. If there is any reason you
+ *    really need an unbracketed comma, you can work around this by
+ *    one of two methods:
+ *     - define a macro that expands to a comma ('#define COMMA ,')
+ *       and then use that macro in place of commas in your macro
+ *       argument. It won't be expanded to an actual comma until after
+ *       the argument-separation has finished.
+ *     - if you're allowed to use C99, define a variadic macro that
+ *       expands to its unmodified input argument list ('#define
+ *       WRAP(...) __VA_ARGS__') and then enclose comma-using code in
+ *       WRAP(). Again, this will protect the commas for just long
+ *       enough.
+ */
+
+/*
+ * MPP_BEFORE: run the code given in the argument 'before' and then
+ * the suffixed statement.
+ *
+ * 'before' should have the syntactic form of one or more declarations
+ * and statements, except that a trailing semicolon may be omitted.
+ * Any declarations will be in scope only within 'before', not within
+ * the suffixed statement.
+ *
+ * This macro, unusually among the collection, is naturally
+ * transparent to 'break' and also transparent to 'continue'.
+ */
+#define MPP_BEFORE(labid,before)                \
+    if (1) {                                    \
+        before;                                 \
+        goto MPI_LABEL(labid, body);            \
+    } else                                      \
+    MPI_LABEL(labid, body):
+
+/*
+ * MPP_AFTER: run the suffixed statement, and then the code given in
+ * the argument 'after'.
+ *
+ * 'after' should have the syntactic form of one or more declarations
+ * and statements, except that a trailing semicolon may be omitted.
+ * Any declaration in 'after' will be in scope only within 'after'.
+ *
+ * This macro is break-unsafe - it causes a 'break' to terminate the
+ * suffixed statement only. If you need different behaviour, you can
+ * use MPP_BREAK_CATCH and MPP_BREAK_THROW to pass a break past it -
+ * but beware that in that case the 'after' clause will not be
+ * executed, so MPP_FINALLY or MPP_BREAK_HANDLER may be useful too.
+ */
+#define MPP_AFTER(labid,after)                  \
+    if (1)                                      \
+        goto MPI_LABEL(labid, body);            \
+    else                                        \
+        while (1)                               \
+            if (1) {                            \
+                after;                          \
+                break;                          \
+            } else                              \
+            MPI_LABEL(labid, body):
+
+/*
+ * MPP_DECLARE: run the 'declaration' argument before the suffixed
+ * statement. The argument may have the form of either a C expression
+ * (e.g. an assignment) or a declaration; if the latter, it will be in
+ * scope within the suffixed statement.
+ *
+ * This macro is break-unsafe - it causes a 'break' to terminate the
+ * suffixed statement only. If you need different behaviour, you can
+ * use MPP_BREAK_CATCH and MPP_BREAK_THROW to pass a break past it.
+ */
+#define MPP_DECLARE(labid, declaration)                 \
+    if (0)                                              \
+        ;                                               \
+    else                                                \
+        for (declaration;;)                             \
+            if (1) {                                    \
+                goto MPI_LABEL(labid, body);            \
+              MPI_LABEL(labid, done): break;            \
+            } else                                      \
+                while (1)                               \
+                    if (1)                              \
+                        goto MPI_LABEL(labid, done);    \
+                    else                                \
+                    MPI_LABEL(labid, body):
+/* (The 'if(0) ; else' at the start of the above is just in case we
+ * encounter an old-style compiler that considers variables declared
+ * in for statements to have scope extending beyond the for statement.
+ * Putting another layer outside the 'for' ensures that the variable's
+ * scope is constrained to _that_ layer even if not to the for itself,
+ * and it doesn't leak into the calling scope. */
+
+/*
+ * MPP_WHILE: run the suffixed statement within a 'while (condition)'
+ * loop.
+ *
+ * In fact, just writing 'while (condition)' works fine for this, but
+ * it's nice to make it look like the rest of these macros!
+ *
+ * This macro defines an actual loop, and 'break' in the suffixed
+ * statement terminates that loop as you would expect.
+ */
+#define MPP_WHILE(labid, condition)             \
+    while (condition)
+
+/*
+ * MPP_DO_WHILE: run the suffixed statement within a loop with the
+ * semantics of 'do suffixed-statement while (condition)'.
+ *
+ * This macro defines an actual loop, and 'break' in the suffixed
+ * statement terminates that loop as you would expect.
+ */
+#define MPP_DO_WHILE(labid, condition)          \
+    if (1)                                      \
+        goto MPI_LABEL(labid, body);            \
+    else                                        \
+        while (condition)                       \
+        MPI_LABEL(labid, body):
+
+/*
+ * MPP_IF: run the suffixed statement only if 'condition' is true.
+ *
+ * This macro is naturally transparent to 'break' and also transparent
+ * to 'continue'.
+ */
+#define MPP_IF(labid, condition)                \
+    if (!(condition))                           \
+        ;                                       \
+    else
+
+/*
+ * MPP_BREAK_THROW and MPP_BREAK_CATCH: propagate 'break' control flow
+ * transfers past other prefixes that mess about with them.
+ *
+ * Write an MPP_BREAK_CATCH, then other metaprogramming prefixes from
+ * this collection, and then an MPP_BREAK_THROW with the same label
+ * id. If the statement following the MPP_BREAK_THROW terminates by
+ * 'break', then the effect will be as if the MPP_BREAK_CATCH had
+ * terminated by 'break', regardless of how the in-between prefixes
+ * would have handled a 'break'.
+ *
+ * These macros are artificially transparent to 'break': they pass
+ * break through, but include a 'break' statement at the top level of
+ * MPP_BREAK_CATCH, so that must always be contained inside some loop
+ * or switch construction.
+ *
+ * We also provide MPS_BREAK_THROW, which is a statement-type macro
+ * that manufactures a break event and passes it to a specified
+ * MPP_BREAK_CATCH.
+ */
+#define MPP_BREAK_CATCH(labid)                  \
+    if (0)                                      \
+    MPI_LABEL(labid, catch): break;             \
+    else
+
+#define MPP_BREAK_THROW(labid)                          \
+    if (1) {                                            \
+        goto MPI_LABEL(labid, body);                    \
+      MPI_LABEL(labid, finish):;                        \
+    } else                                              \
+        while (1)                                       \
+            if (1)                                      \
+                goto MPI_LABEL(labid, catch);           \
+            else                                        \
+                while (1)                               \
+                    if (1)                              \
+                        goto MPI_LABEL(labid, finish);  \
+                    else                                \
+                    MPI_LABEL(labid, body):
+
+#define MPS_BREAK_THROW(labid) goto MPI_LABEL(labid, catch)
+
+/*
+ * MPP_BREAK_HANDLER: handle a 'break' in the suffixed statement by
+ * executing the provided handler code and then terminating as if by
+ * break.
+ *
+ * 'handler' should have the syntactic form of one or more
+ * declarations and statements, except that a trailing semicolon may
+ * be omitted.
+ *
+ * This macro is artificially transparent to 'break': it passes break
+ * through, but includes a 'break' statement at the top level, so it
+ * must always be contained inside some loop or switch construction.
+ */
+#define MPP_BREAK_HANDLER(labid, handler)               \
+    if (1) {                                            \
+        goto MPI_LABEL(labid, body);                    \
+      MPI_LABEL(labid, break):                          \
+        {handler;}                                      \
+        break;                                          \
+      MPI_LABEL(labid, finish):;                        \
+    } else                                              \
+        while (1)                                       \
+            if (1)                                      \
+                goto MPI_LABEL(labid, break);           \
+            else                                        \
+                while (1)                               \
+                    if (1)                              \
+                        goto MPI_LABEL(labid, finish);  \
+                    else                                \
+                    MPI_LABEL(labid, body):
+
+/*
+ * MPP_FINALLY: execute the suffixed statement, and execute the
+ * provided 'finally' clause after it finishes. If it terminates by
+ * 'break', execute the same 'finally' clause but propagate the break
+ * to the containing statement.
+ *
+ * 'finally' should have the syntactic form of one or more
+ * declarations and statements, except that a trailing semicolon may
+ * be omitted.
+ *
+ * The 'finally' argument will be double-expanded. Of course it'll
+ * only be executed once in any given run, so that's not a concern for
+ * function side effects, but don't do anything fiddly like declaring
+ * a static variable to which you return a pointer and then expecting
+ * the pointer to be the same no matter which copy of 'finally' it
+ * came from.
+ *
+ * This macro is artificially transparent to 'break': it passes break
+ * through, but includes a 'break' statement at the top level, so it
+ * must always be contained inside some loop or switch construction.
+ */
+#define MPP_FINALLY(labid, finally)                     \
+    if (1) {                                            \
+        goto MPI_LABEL(labid, body);                    \
+      MPI_LABEL(labid, break):                          \
+        {finally;}                                      \
+        break;                                          \
+      MPI_LABEL(labid, finish):                         \
+        {finally;}                                      \
+    } else                                              \
+        while (1)                                       \
+            if (1)                                      \
+                goto MPI_LABEL(labid, break);           \
+            else                                        \
+                while (1)                               \
+                    if (1)                              \
+                        goto MPI_LABEL(labid, finish);  \
+                    else                                \
+                    MPI_LABEL(labid, body):
+
+/*
+ * MPP_BREAK_STOP: handle a 'break' in the suffixed statement by
+ * executing the provided handler code and then terminating as if
+ * normally.
+ *
+ * 'handler' should have the syntactic form of one or more
+ * declarations and statements, except that a trailing semicolon may
+ * be omitted.
+ */
+#define MPP_BREAK_STOP(labid, handler)                  \
+    if (1) {                                            \
+        goto MPI_LABEL(labid, body);                    \
+      MPI_LABEL(labid, break):                          \
+        {handler;}                                      \
+      MPI_LABEL(labid, finish):;                        \
+    } else                                              \
+        while (1)                                       \
+            if (1)                                      \
+                goto MPI_LABEL(labid, break);           \
+            else                                        \
+                while (1)                               \
+                    if (1)                              \
+                        goto MPI_LABEL(labid, finish);  \
+                    else                                \
+                    MPI_LABEL(labid, body):
+
+/*
+ * MPP_ELSE_ACCEPT, MPS_MAIN_INVOKE, MPS_ELSE_INVOKE: arrange to
+ * accept an optional 'else' clause after the suffixed statement, and
+ * provide two statement macros which jump to the main clause and the
+ * else clause. The main (non-else) clause will be be executed in the
+ * default case, and can be invoked again using MPS_MAIN_INVOKE;
+ * MPS_ELSE_INVOKE will invoke the else clause.
+ *
+ * Like MPP_BREAK_THROW and MPP_BREAK_CATCH, these macros should be
+ * used in groups with the same label id, so as to match them up to
+ * each other. MPS_ELSE_INVOKE and MPS_MAIN_INVOKE will go to the
+ * appropriate clauses corresponding to the MPP_ELSE_ACCEPT with the
+ * same id.
+ */
+#define MPP_ELSE_ACCEPT(labid)                  \
+    if (1)                                      \
+        goto MPI_LABEL(labid, body);            \
+    else                                        \
+    MPI_LABEL(labid, else):                     \
+        if (0)                                  \
+        MPI_LABEL(labid, body):
+
+#define MPS_MAIN_INVOKE(labid)                  \
+    goto MPI_LABEL(labid, body)
+
+#define MPS_ELSE_INVOKE(labid)                  \
+    goto MPI_LABEL(labid, else)
+
+/*
+ * MPP_ELSE_GENERAL: like MPP_ELSE_ACCEPT, but also lets you provide a
+ * snippet of code that will be run after the else clause terminates
+ * and one which will be run after the else clause breaks.
+ *
+ * You can use MPS_MAIN_INVOKE and MPS_ELSE_INVOKE with this as well
+ * as with MPP_ELSE_ACCEPT.
+ *
+ * Will mess up what happens after the main body, so you'll probably
+ * want to follow this macro with others such as MPP_AFTER and
+ * something to catch break in the main body too.
+ */
+#define MPP_ELSE_GENERAL(labid, after, breakhandler)    \
+    if (1)                                              \
+        goto MPI_LABEL(labid, body);                    \
+    else                                                \
+        while (1)                                       \
+            if (1) {                                    \
+                {breakhandler;}                         \
+                break;                                  \
+            } else                                      \
+                while (1)                               \
+                    if (1) {                            \
+                        {after;}                        \
+                        break;                          \
+                    } else                              \
+                    MPI_LABEL(labid, else):             \
+                        if (0)                          \
+                        MPI_LABEL(labid, body):
diff --git a/lib/orderfiles.c b/lib/orderfiles.c
new file mode 100644
index 0000000..05bafe9
--- /dev/null
+++ b/lib/orderfiles.c
@@ -0,0 +1,180 @@
+/*
+ * orderfiles.c: order file accesses to optimise disk load
+ *
+ * Copyright (C) 2014 Colin Watson.
+ *
+ * Inspired by and loosely based on dpkg/src/filesdb.c, which is:
+ *   Copyright (C) 1995 Ian Jackson <ian@chiark.greenend.org.uk>
+ *   Copyright (C) 2000,2001 Wichert Akkerman <wakkerma@debian.org>
+ *   Copyright (C) 2008-2014 Guillem Jover <guillem@debian.org>
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#ifdef HAVE_LINUX_FIEMAP_H
+#  include <linux/fiemap.h>
+#  include <linux/fs.h>
+#  include <sys/ioctl.h>
+#  include <sys/vfs.h>
+#endif /* HAVE_LINUX_FIEMAP_H */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "attribute.h"
+#include "gl_hash_map.h"
+#include "gl_rbtree_list.h"
+#include "gl_xlist.h"
+#include "gl_xmap.h"
+#include "xalloc.h"
+
+#include "manconfig.h"
+
+#include "glcontainers.h"
+#include "orderfiles.h"
+
+#if defined(HAVE_LINUX_FIEMAP_H)
+gl_map_t physical_offsets = NULL;
+
+static int compare_physical_offsets (const void *a, const void *b)
+{
+	const char *left = (const char *) a;
+	const char *right = (const char *) b;
+	const uint64_t *left_offset_p = gl_map_get (physical_offsets, left);
+	const uint64_t *right_offset_p = gl_map_get (physical_offsets, right);
+	uint64_t left_offset = left_offset_p ? *left_offset_p : UINT64_MAX;
+	uint64_t right_offset = right_offset_p ? *right_offset_p : UINT64_MAX;
+
+	if (left_offset < right_offset)
+		return -1;
+	else if (left_offset > right_offset)
+		return 1;
+	else
+		return 0;
+}
+
+void order_files (const char *dir, gl_list_t *basenamesp)
+{
+	gl_list_t basenames = *basenamesp, sorted_basenames;
+	int dir_fd_open_flags;
+	int dir_fd;
+	struct statfs fs;
+	const char *name;
+
+	dir_fd_open_flags = O_SEARCH | O_DIRECTORY;
+#ifdef O_PATH
+	dir_fd_open_flags |= O_PATH;
+#endif
+	dir_fd = open (dir, dir_fd_open_flags);
+	if (dir_fd < 0)
+		return;
+
+	if (fstatfs (dir_fd, &fs) < 0) {
+		close (dir_fd);
+		return;
+	}
+
+	/* Sort files by the physical locations of their first blocks, in an
+	 * attempt to minimise disk drive head movements.  This assumes that
+	 * files are small enough that they are likely to be in one block or
+	 * a small number of contiguous blocks, which seems a reasonable
+	 * assumption for manual pages.
+	 */
+	physical_offsets = gl_map_create_empty (GL_HASH_MAP, string_equals,
+						string_hash, NULL, plain_free);
+	sorted_basenames = new_string_list (GL_RBTREE_LIST, false);
+	GL_LIST_FOREACH (basenames, name) {
+		struct {
+			struct fiemap fiemap;
+			struct fiemap_extent extent;
+		} fm;
+		int fd;
+
+		fd = openat (dir_fd, name, O_RDONLY);
+		if (fd < 0)
+			continue;
+
+		memset (&fm, 0, sizeof (fm));
+		fm.fiemap.fm_start = 0;
+		fm.fiemap.fm_length = fs.f_bsize;
+		fm.fiemap.fm_flags = 0;
+		fm.fiemap.fm_extent_count = 1;
+
+		if (ioctl (fd, FS_IOC_FIEMAP, (unsigned long) &fm) == 0) {
+			uint64_t *offset = XMALLOC (uint64_t);
+			*offset = fm.extent.fe_physical;
+			/* Borrow the key from basenames; since
+			 * physical_offsets has a shorter lifetime, we don't
+			 * need to duplicate it.
+			 */
+			gl_map_put (physical_offsets, name, offset);
+		}
+
+		close (fd);
+		gl_sortedlist_add (sorted_basenames, compare_physical_offsets,
+				   xstrdup (name));
+	}
+	gl_map_free (physical_offsets);
+	physical_offsets = NULL;
+	close (dir_fd);
+	gl_list_free (basenames);
+	*basenamesp = sorted_basenames;
+}
+#elif defined(HAVE_POSIX_FADVISE)
+void order_files (const char *dir, gl_list_t *basenamesp)
+{
+	gl_list_t basenames = *basenamesp;
+	int dir_fd_open_flags;
+	int dir_fd;
+	const char *name;
+
+	dir_fd_open_flags = O_SEARCH | O_DIRECTORY;
+#ifdef O_PATH
+	dir_fd_open_flags |= O_PATH;
+#endif
+	dir_fd = open (dir, dir_fd_open_flags);
+	if (dir_fd < 0)
+		return;
+
+	/* While we can't actually order the files, we can at least ask the
+	 * kernel to preload them.
+	 */
+	GL_LIST_FOREACH (basenames, name) {
+		int fd = openat (dir_fd, name, O_RDONLY | O_NONBLOCK);
+		if (fd >= 0) {
+			posix_fadvise (fd, 0, 0, POSIX_FADV_WILLNEED);
+			close (fd);
+		}
+	}
+
+	close (dir_fd);
+}
+#else
+void order_files (const char *dir MAYBE_UNUSED,
+		  gl_list_t *basenamesp MAYBE_UNUSED)
+{
+}
+#endif
diff --git a/lib/orderfiles.h b/lib/orderfiles.h
new file mode 100644
index 0000000..dae41cc
--- /dev/null
+++ b/lib/orderfiles.h
@@ -0,0 +1,25 @@
+/*
+ * orderfiles.h: interface to ordering file accesses to optimise disk load
+ *
+ * Copyright (C) 2014 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "gl_list.h"
+
+void order_files (const char *dir, gl_list_t *basenamesp);
diff --git a/lib/pathsearch.c b/lib/pathsearch.c
new file mode 100644
index 0000000..34eac08
--- /dev/null
+++ b/lib/pathsearch.c
@@ -0,0 +1,146 @@
+/*
+ * pathsearch.c: $PATH-searching functions.
+ *
+ * Copyright (C) 2004, 2007, 2008, 2009, 2011 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <assert.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include "gettext.h"
+#define _(String) gettext (String)
+
+#include "xalloc.h"
+#include "xgetcwd.h"
+#include "xvasprintf.h"
+
+#include "manconfig.h"
+
+#include "fatal.h"
+#include "pathsearch.h"
+
+static bool pathsearch (const char *name, const mode_t bits)
+{
+	char *cwd = NULL;
+	char *path = getenv ("PATH");
+	char *pathtok;
+	const char *element;
+	struct stat st;
+	bool ret = false;
+
+	if (!path)
+		/* Eh? Oh well. */
+		return false;
+
+	if (strchr (name, '/')) {
+		/* Qualified name; look directly. */
+		if (stat (name, &st) == -1)
+			return false;
+		if (S_ISREG (st.st_mode) && (st.st_mode & bits))
+			return true;
+		return false;
+	}
+
+	pathtok = path = xstrdup (path);
+
+	/* Unqualified name; iterate over $PATH looking for it. */
+	for (element = strsep (&pathtok, ":"); element;
+	     element = strsep (&pathtok, ":")) {
+		char *filename;
+
+		if (!*element) {
+			if (!cwd)
+				cwd = xgetcwd ();
+			if (!cwd)
+				fatal (errno,
+				       _("can't determine current directory"));
+			element = cwd;
+		}
+
+		filename = xasprintf ("%s/%s", element, name);
+		assert (filename);
+		if (stat (filename, &st) == -1) {
+			free (filename);
+			continue;
+		}
+
+		free (filename);
+
+		if (S_ISREG (st.st_mode) && (st.st_mode & bits)) {
+			ret = true;
+			break;
+		}
+	}
+
+	free (path);
+	free (cwd);
+	return ret;
+}
+
+bool pathsearch_executable (const char *name)
+{
+	return pathsearch (name, 0111);
+}
+
+bool directory_on_path (const char *dir)
+{
+	char *cwd = NULL;
+	char *path = getenv ("PATH");
+	char *pathtok;
+	const char *element;
+	bool ret = false;
+
+	if (!path)
+		/* Eh? Oh well. */
+		return false;
+
+	pathtok = path = xstrdup (path);
+
+	for (element = strsep (&pathtok, ":"); element;
+	     element = strsep (&pathtok, ":")) {
+		if (!*element) {
+			if (!cwd)
+				cwd = xgetcwd ();
+			if (!cwd)
+				fatal (errno,
+				       _("can't determine current directory"));
+			element = cwd;
+		}
+
+		if (STREQ (element, dir)) {
+			ret = true;
+			break;
+		}
+	}
+
+	free (path);
+	free (cwd);
+	return ret;
+}
diff --git a/lib/pathsearch.h b/lib/pathsearch.h
new file mode 100644
index 0000000..d9b024d
--- /dev/null
+++ b/lib/pathsearch.h
@@ -0,0 +1,36 @@
+/*
+ * pathsearch.h: interface to $PATH-searching functions
+ *
+ * Copyright (C) 2004 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA.
+ */
+
+#ifndef PATHSEARCH_H
+#define PATHSEARCH_H
+
+#include <stdbool.h>
+
+/* Return true if NAME is found as an executable regular file on the $PATH,
+ * otherwise false.
+ */
+bool pathsearch_executable (const char *name);
+
+/* Return true if DIR matches an entry on the $PATH, otherwise false. */
+bool directory_on_path (const char *dir);
+
+#endif /* PATHSEARCH_H */
diff --git a/lib/sandbox.c b/lib/sandbox.c
new file mode 100644
index 0000000..f891e53
--- /dev/null
+++ b/lib/sandbox.c
@@ -0,0 +1,666 @@
+/*
+ * sandbox.c: Process sandboxing
+ *
+ * Copyright (C) 2017 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Some of the syscall lists in this file come from systemd, whose
+ * copyright/licensing statement is as follows.  Per LGPLv2.1 s. 3, I have
+ * altered the original references to LGPLv2.1 to refer to GPLv2 instead.
+ *
+ * Copyright 2014 Lennart Poettering
+ *
+ * systemd 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * systemd 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 systemd; If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef HAVE_LIBSECCOMP
+#  include <sys/ioctl.h>
+#  include <sys/ipc.h>
+#  include <sys/mman.h>
+#  include <sys/prctl.h>
+#  include <sys/shm.h>
+#  include <sys/socket.h>
+#  include <termios.h>
+#  include <seccomp.h>
+#endif /* HAVE_LIBSECCOMP */
+
+#include "attribute.h"
+#include "xalloc.h"
+#include "xstrndup.h"
+
+#include "manconfig.h"
+
+#include "debug.h"
+#include "fatal.h"
+#include "sandbox.h"
+
+struct man_sandbox {
+#ifdef HAVE_LIBSECCOMP
+	scmp_filter_ctx ctx;
+	scmp_filter_ctx permissive_ctx;
+#else /* !HAVE_LIBSECCOMP */
+	char dummy;
+#endif /* HAVE_LIBSECCOMP */
+};
+
+#ifdef HAVE_LIBSECCOMP
+static bool seccomp_filter_unavailable = false;
+
+static void gripe_seccomp_filter_unavailable (void)
+{
+	debug ("seccomp filtering requires a kernel configured with "
+	       "CONFIG_SECCOMP_FILTER\n");
+}
+
+static bool search_ld_preload (const char *needle)
+{
+	const char *ld_preload_env;
+	static char *ld_preload_file = NULL;
+
+	ld_preload_env = getenv ("LD_PRELOAD");
+	if (ld_preload_env && strstr (ld_preload_env, needle) != NULL)
+		return true;
+
+	if (!ld_preload_file) {
+		int fd;
+		struct stat st;
+		char *mapped = NULL;
+
+		fd = open ("/etc/ld.so.preload", O_RDONLY);
+		if (fd >= 0 && fstat (fd, &st) >= 0 && st.st_size)
+			mapped = mmap (NULL, st.st_size, PROT_READ,
+				       MAP_PRIVATE | MAP_FILE, fd, 0);
+		if (mapped) {
+			ld_preload_file = xstrndup (mapped, st.st_size);
+			munmap (mapped, st.st_size);
+		} else
+			ld_preload_file = xstrdup ("");
+		if (fd >= 0)
+			close (fd);
+	}
+	/* This isn't very accurate: /etc/ld.so.preload may contain
+	 * comments.  On the other hand, glibc says "it should only be used
+	 * for emergencies and testing".  File a bug if this is a problem
+	 * for you.
+	 */
+	if (strstr (ld_preload_file, needle) != NULL)
+		return true;
+
+	return false;
+}
+
+/* Can we load a seccomp filter into this process?
+ *
+ * This guard allows us to call sandbox_load in code paths that may
+ * conditionally do so again.
+ */
+static bool can_load_seccomp (void)
+{
+	const char *man_disable_seccomp;
+	int seccomp_status;
+
+	if (seccomp_filter_unavailable) {
+		gripe_seccomp_filter_unavailable ();
+		return false;
+	}
+
+	man_disable_seccomp = getenv ("MAN_DISABLE_SECCOMP");
+	if (man_disable_seccomp && *man_disable_seccomp) {
+		debug ("seccomp filter disabled by user request\n");
+		return false;
+	}
+
+	/* Valgrind causes the child process to make some system calls we
+	 * don't want to allow in general, so disable seccomp when running
+	 * on Valgrind.
+	 *
+	 * The correct approach seems to be to either require valgrind.h at
+	 * build-time or copy valgrind.h into this project and then use the
+	 * RUNNING_ON_VALGRIND macro, but I'd really rather not add a
+	 * build-dependency for this or take a copy of a >6000-line header
+	 * file.  Since the goal of this is only to disable the seccomp
+	 * filter under Valgrind, this will do for now.
+	 */
+	if (search_ld_preload ("/vgpreload")) {
+		debug ("seccomp filter disabled while running under "
+		       "Valgrind\n");
+		return false;
+	}
+
+	seccomp_status = prctl (PR_GET_SECCOMP);
+
+	if (seccomp_status == 0)
+		return true;
+
+	if (seccomp_status == -1) {
+		if (errno == EINVAL)
+			debug ("running kernel does not support seccomp\n");
+		else
+			debug ("unknown error getting seccomp status: %s\n",
+			       strerror (errno));
+	} else if (seccomp_status == 2)
+		debug ("seccomp already enabled\n");
+	else
+		debug ("unknown return value from PR_GET_SECCOMP: %d\n",
+		       seccomp_status);
+	return false;
+}
+#endif /* HAVE_LIBSECCOMP */
+
+#ifdef HAVE_LIBSECCOMP
+
+#define SC_ALLOW(name) \
+	do { \
+		int nr = seccomp_syscall_resolve_name (name); \
+		if (nr == __NR_SCMP_ERROR) \
+			break; \
+		if (seccomp_rule_add (ctx, SCMP_ACT_ALLOW, nr, 0) < 0) \
+			fatal (errno, "can't add seccomp rule"); \
+	} while (0)
+
+#define SC_ALLOW_PERMISSIVE(name) \
+	do { \
+		if (permissive) \
+			SC_ALLOW (name); \
+	} while (0)
+
+#define SC_ALLOW_ARG_1(name, cmp1) \
+	do { \
+		int nr = seccomp_syscall_resolve_name (name); \
+		if (nr == __NR_SCMP_ERROR) \
+			break; \
+		if (seccomp_rule_add (ctx, SCMP_ACT_ALLOW, nr, 1, cmp1) < 0) \
+			fatal (errno, "can't add seccomp rule"); \
+	} while (0)
+
+#define SC_ALLOW_ARG_2(name, cmp1, cmp2) \
+	do { \
+		int nr = seccomp_syscall_resolve_name (name); \
+		if (nr == __NR_SCMP_ERROR) \
+			break; \
+		if (seccomp_rule_add (ctx, SCMP_ACT_ALLOW, nr, \
+				      2, cmp1, cmp2) < 0) \
+			fatal (errno, "can't add seccomp rule"); \
+	} while (0)
+
+/* Create a seccomp filter.
+ *
+ * If permissive is true, then the returned filter will allow limited file
+ * creation (although not making executable files).  This obviously
+ * constitutes less effective confinement, but it's necessary for some
+ * subprocesses (such as groff) that need the ability to write to temporary
+ * files.  Confining these further requires additional tools that can do
+ * path-based filtering or similar, such as AppArmor.
+ */
+static scmp_filter_ctx make_seccomp_filter (bool permissive)
+{
+	scmp_filter_ctx ctx;
+	mode_t mode_mask = S_ISUID | S_ISGID | S_IXUSR | S_IXGRP | S_IXOTH;
+	int create_mask = O_CREAT
+#ifdef O_TMPFILE
+		| O_TMPFILE
+#endif /* O_TMPFILE */
+		;
+
+	if (!can_load_seccomp ())
+		return NULL;
+
+	debug ("initialising seccomp filter (permissive: %d)\n",
+	       (int) permissive);
+	ctx = seccomp_init (SCMP_ACT_ERRNO (ENOSYS));
+	if (!ctx)
+		fatal (errno, "can't initialise seccomp filter");
+
+	/* Allow sibling architectures for x86, since people sometimes mix
+	 * and match architectures there for performance reasons.
+	 */
+	switch (seccomp_arch_native ()) {
+		case SCMP_ARCH_X86:
+			seccomp_arch_add (ctx, SCMP_ARCH_X86_64);
+			seccomp_arch_add (ctx, SCMP_ARCH_X32);
+			break;
+		case SCMP_ARCH_X86_64:
+			seccomp_arch_add (ctx, SCMP_ARCH_X86);
+			seccomp_arch_add (ctx, SCMP_ARCH_X32);
+			break;
+		case SCMP_ARCH_X32:
+			seccomp_arch_add (ctx, SCMP_ARCH_X86);
+			seccomp_arch_add (ctx, SCMP_ARCH_X86_64);
+			break;
+	}
+
+	/* This sandbox is intended to allow operations that might
+	 * reasonably be needed in simple data-transforming pipes: it should
+	 * allow the process to do most reasonable things to itself, to read
+	 * and write data from and to already-open file descriptors, to open
+	 * files in read-only mode, and to fork new processes with the same
+	 * restrictions.  (If permissive is true, then it should also allow
+	 * limited file creation; see the header comment above.)
+	 *
+	 * Since I currently know of no library with suitable syscall lists,
+	 * the syscall lists here are taken from
+	 * systemd:src/shared/seccomp-util.c, last updated from commit
+	 * bca5a0eaccc849a669b4279e4bfcc6507083a07b (2019-08-01).
+	 */
+
+	/* systemd: SystemCallFilter=@default */
+	SC_ALLOW ("clock_getres");
+	SC_ALLOW ("clock_gettime");
+	SC_ALLOW ("clock_gettime64");
+	SC_ALLOW ("clock_nanosleep");
+	SC_ALLOW ("execve");
+	SC_ALLOW ("exit");
+	SC_ALLOW ("exit_group");
+	SC_ALLOW ("futex");
+	SC_ALLOW ("get_robust_list");
+	SC_ALLOW ("get_thread_area");
+	SC_ALLOW ("getegid");
+	SC_ALLOW ("getegid32");
+	SC_ALLOW ("geteuid");
+	SC_ALLOW ("geteuid32");
+	SC_ALLOW ("getgid");
+	SC_ALLOW ("getgid32");
+	SC_ALLOW ("getgroups");
+	SC_ALLOW ("getgroups32");
+	SC_ALLOW ("getpgid");
+	SC_ALLOW ("getpgrp");
+	SC_ALLOW ("getpid");
+	SC_ALLOW ("getppid");
+	SC_ALLOW ("getresgid");
+	SC_ALLOW ("getresgid32");
+	SC_ALLOW ("getresuid");
+	SC_ALLOW ("getresuid32");
+	SC_ALLOW ("getrlimit");
+	SC_ALLOW ("getsid");
+	SC_ALLOW ("gettid");
+	SC_ALLOW ("gettimeofday");
+	SC_ALLOW ("getuid");
+	SC_ALLOW ("getuid32");
+	SC_ALLOW ("membarrier");
+	SC_ALLOW ("nanosleep");
+	SC_ALLOW ("pause");
+	SC_ALLOW ("prlimit64");
+	SC_ALLOW ("restart_syscall");
+	SC_ALLOW ("rseq");
+	SC_ALLOW ("rt_sigreturn");
+	SC_ALLOW ("sched_yield");
+	SC_ALLOW ("set_robust_list");
+	SC_ALLOW ("set_thread_area");
+	SC_ALLOW ("set_tid_address");
+	SC_ALLOW ("set_tls");
+	SC_ALLOW ("sigreturn");
+	SC_ALLOW ("time");
+	SC_ALLOW ("ugetrlimit");
+
+	/* systemd: SystemCallFilter=@basic-io */
+	SC_ALLOW ("_llseek");
+	SC_ALLOW ("close");
+	SC_ALLOW ("dup");
+	SC_ALLOW ("dup2");
+	SC_ALLOW ("dup3");
+	SC_ALLOW ("lseek");
+	SC_ALLOW ("pread64");
+	SC_ALLOW ("preadv");
+	SC_ALLOW ("preadv2");
+	SC_ALLOW ("pwrite64");
+	SC_ALLOW ("pwritev");
+	SC_ALLOW ("pwritev2");
+	SC_ALLOW ("read");
+	SC_ALLOW ("readv");
+	SC_ALLOW ("write");
+	SC_ALLOW ("writev");
+
+	/* systemd: SystemCallFilter=@file-system (subset) */
+	SC_ALLOW ("access");
+	SC_ALLOW ("chdir");
+	if (permissive) {
+		SC_ALLOW_ARG_1 ("chmod",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+		SC_ALLOW_ARG_1 ("creat",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+	}
+	SC_ALLOW ("faccessat");
+	SC_ALLOW ("fallocate");
+	SC_ALLOW ("fchdir");
+	if (permissive) {
+		SC_ALLOW_ARG_1 ("fchmod",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+		SC_ALLOW_ARG_1 ("fchmodat",
+				SCMP_A2 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+	}
+	SC_ALLOW ("fcntl");
+	SC_ALLOW ("fcntl64");
+	SC_ALLOW ("fstat");
+	SC_ALLOW ("fstat64");
+	SC_ALLOW ("fstatat64");
+	SC_ALLOW ("fstatfs");
+	SC_ALLOW ("fstatfs64");
+	SC_ALLOW ("ftruncate");
+	SC_ALLOW ("ftruncate64");
+	SC_ALLOW_PERMISSIVE ("futimesat");
+	SC_ALLOW ("getcwd");
+	SC_ALLOW ("getdents");
+	SC_ALLOW ("getdents64");
+	SC_ALLOW_PERMISSIVE ("link");
+	SC_ALLOW_PERMISSIVE ("linkat");
+	SC_ALLOW ("lstat");
+	SC_ALLOW ("lstat64");
+	SC_ALLOW_PERMISSIVE ("mkdir");
+	SC_ALLOW_PERMISSIVE ("mkdirat");
+	SC_ALLOW ("mmap");
+	SC_ALLOW ("mmap2");
+	SC_ALLOW ("munmap");
+	SC_ALLOW ("newfstatat");
+	SC_ALLOW ("oldfstat");
+	SC_ALLOW ("oldlstat");
+	SC_ALLOW ("oldstat");
+	if (permissive) {
+		SC_ALLOW_ARG_2 ("open",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ, O_CREAT, O_CREAT),
+				SCMP_A2 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+		SC_ALLOW_ARG_2 ("openat",
+				SCMP_A2 (SCMP_CMP_MASKED_EQ, O_CREAT, O_CREAT),
+				SCMP_A3 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+#ifdef O_TMPFILE
+		SC_ALLOW_ARG_2 ("open",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ,
+					 O_TMPFILE, O_TMPFILE),
+				SCMP_A2 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+		SC_ALLOW_ARG_2 ("openat",
+				SCMP_A2 (SCMP_CMP_MASKED_EQ,
+					 O_TMPFILE, O_TMPFILE),
+				SCMP_A3 (SCMP_CMP_MASKED_EQ, mode_mask, 0));
+#endif /* O_TMPFILE */
+		SC_ALLOW_ARG_1 ("open",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ, create_mask, 0));
+		SC_ALLOW_ARG_1 ("openat",
+				SCMP_A2 (SCMP_CMP_MASKED_EQ, create_mask, 0));
+	} else {
+		SC_ALLOW_ARG_1 ("open",
+				SCMP_A1 (SCMP_CMP_MASKED_EQ, O_ACCMODE,
+					 O_RDONLY));
+		SC_ALLOW_ARG_1 ("openat",
+				SCMP_A2 (SCMP_CMP_MASKED_EQ, O_ACCMODE,
+					 O_RDONLY));
+	}
+	SC_ALLOW ("readlink");
+	SC_ALLOW ("readlinkat");
+	SC_ALLOW_PERMISSIVE ("rename");
+	SC_ALLOW_PERMISSIVE ("renameat");
+	SC_ALLOW_PERMISSIVE ("renameat2");
+	SC_ALLOW_PERMISSIVE ("rmdir");
+	SC_ALLOW ("stat");
+	SC_ALLOW ("stat64");
+	SC_ALLOW ("statfs");
+	SC_ALLOW ("statfs64");
+	SC_ALLOW ("statx");
+	SC_ALLOW_PERMISSIVE ("symlink");
+	SC_ALLOW_PERMISSIVE ("symlinkat");
+	SC_ALLOW_PERMISSIVE ("truncate");
+	SC_ALLOW_PERMISSIVE ("truncateat");
+	SC_ALLOW_PERMISSIVE ("unlink");
+	SC_ALLOW_PERMISSIVE ("unlinkat");
+	SC_ALLOW_PERMISSIVE ("utime");
+	SC_ALLOW_PERMISSIVE ("utimensat");
+	SC_ALLOW_PERMISSIVE ("utimes");
+
+	/* systemd: SystemCallFilter=@io-event */
+	SC_ALLOW ("_newselect");
+	SC_ALLOW ("epoll_create");
+	SC_ALLOW ("epoll_create1");
+	SC_ALLOW ("epoll_ctl");
+	SC_ALLOW ("epoll_ctl_old");
+	SC_ALLOW ("epoll_pwait");
+	SC_ALLOW ("epoll_wait");
+	SC_ALLOW ("epoll_wait_old");
+	SC_ALLOW ("eventfd");
+	SC_ALLOW ("eventfd2");
+	SC_ALLOW ("poll");
+	SC_ALLOW ("ppoll");
+	SC_ALLOW ("pselect6");
+	SC_ALLOW ("select");
+
+	/* systemd: SystemCallFilter=@ipc (subset) */
+	SC_ALLOW ("pipe");
+	SC_ALLOW ("pipe2");
+
+	/* systemd: SystemCallFilter=@process (subset) */
+	SC_ALLOW ("arch_prctl");
+	SC_ALLOW ("capget");
+	SC_ALLOW ("clone");
+	SC_ALLOW ("execveat");
+	SC_ALLOW ("fork");
+	SC_ALLOW ("getrusage");
+	SC_ALLOW ("prctl");
+	SC_ALLOW ("vfork");
+	SC_ALLOW ("wait4");
+	SC_ALLOW ("waitid");
+	SC_ALLOW ("waitpid");
+
+	/* systemd: SystemCallFilter=@signal */
+	SC_ALLOW ("rt_sigaction");
+	SC_ALLOW ("rt_sigpending");
+	SC_ALLOW ("rt_sigprocmask");
+	SC_ALLOW ("rt_sigsuspend");
+	SC_ALLOW ("rt_sigtimedwait");
+	SC_ALLOW ("sigaction");
+	SC_ALLOW ("sigaltstack");
+	SC_ALLOW ("signal");
+	SC_ALLOW ("signalfd");
+	SC_ALLOW ("signalfd4");
+	SC_ALLOW ("sigpending");
+	SC_ALLOW ("sigprocmask");
+	SC_ALLOW ("sigsuspend");
+
+	/* systemd: SystemCallFilter=@sync */
+	SC_ALLOW ("fdatasync");
+	SC_ALLOW ("fsync");
+	SC_ALLOW ("msync");
+	SC_ALLOW ("sync");
+	SC_ALLOW ("sync_file_range");
+	SC_ALLOW ("syncfs");
+
+	/* systemd: SystemCallFilter=@system-service (subset) */
+	SC_ALLOW ("brk");
+	SC_ALLOW ("fadvise64");
+	SC_ALLOW ("fadvise64_64");
+	SC_ALLOW ("getrandom");
+	if (permissive)
+		SC_ALLOW ("ioctl");
+	else {
+		SC_ALLOW_ARG_1 ("ioctl", SCMP_A1 (SCMP_CMP_EQ, TCGETS));
+		SC_ALLOW_ARG_1 ("ioctl", SCMP_A1 (SCMP_CMP_EQ, TIOCGWINSZ));
+	}
+	SC_ALLOW ("madvise");
+	SC_ALLOW ("mprotect");
+	SC_ALLOW ("mremap");
+	SC_ALLOW ("sched_getaffinity");
+	SC_ALLOW ("sysinfo");
+	SC_ALLOW ("uname");
+
+	/* Extra syscalls not in any of systemd's sets. */
+	SC_ALLOW ("arm_fadvise64_64");
+	SC_ALLOW ("arm_sync_file_range");
+	SC_ALLOW ("sync_file_range2");
+
+	/* Allow killing processes and threads.  This is unfortunate but
+	 * unavoidable: groff uses kill to explicitly pass on SIGPIPE to its
+	 * child processes, and we can't do any more sophisticated filtering
+	 * in seccomp.
+	 */
+	SC_ALLOW ("kill");
+	SC_ALLOW ("tgkill");
+
+	/* Allow some relatively harmless System V shared memory operations.
+	 * These seem to be popular among the sort of program that wants to
+	 * install itself in /etc/ld.so.preload or similar (e.g. antivirus
+	 * programs and VPNs).
+	 */
+	SC_ALLOW_ARG_1 ("shmat", SCMP_A2 (SCMP_CMP_EQ, SHM_RDONLY));
+	SC_ALLOW_ARG_1 ("shmctl", SCMP_A1 (SCMP_CMP_EQ, IPC_STAT));
+	SC_ALLOW ("shmdt");
+	SC_ALLOW ("shmget");
+
+	/* Some antivirus programs use an LD_PRELOAD wrapper that wants to
+	 * talk to a private daemon using a Unix-domain socket.  We really
+	 * don't want to allow these syscalls in general, but if such a
+	 * thing is in use we probably have no choice.
+	 *
+	 * snoopy is an execve monitoring tool that may log messages to
+	 * /dev/log.
+	 */
+	if (search_ld_preload ("libesets_pac.so") ||
+	    search_ld_preload ("libscep_pac.so") ||
+	    search_ld_preload ("libsnoopy.so")) {
+		SC_ALLOW ("connect");
+		SC_ALLOW ("recvmsg");
+		SC_ALLOW ("sendmsg");
+		SC_ALLOW ("sendto");
+		SC_ALLOW ("setsockopt");
+		SC_ALLOW_ARG_1 ("socket", SCMP_A0 (SCMP_CMP_EQ, AF_UNIX));
+	}
+	/* ESET sends messages to a System V message queue. */
+	if (search_ld_preload ("libesets_pac.so") ||
+	    search_ld_preload ("libscep_pac.so")) {
+		SC_ALLOW_ARG_1 ("msgget", SCMP_A1 (SCMP_CMP_EQ, 0));
+		SC_ALLOW ("msgsnd");
+	}
+
+	return ctx;
+}
+
+#undef SC_ALLOW_ARG_2
+#undef SC_ALLOW_ARG_1
+#undef SC_ALLOW
+
+#endif /* HAVE_LIBSECCOMP */
+
+/* Create a sandbox for processing untrusted data.
+ *
+ * This only sets up data structures; the caller must call sandbox_load to
+ * actually enter the sandbox.
+ */
+man_sandbox *sandbox_init (void)
+{
+	man_sandbox *sandbox = XZALLOC (man_sandbox);
+
+#ifdef HAVE_LIBSECCOMP
+	sandbox->ctx = make_seccomp_filter (false);
+	sandbox->permissive_ctx = make_seccomp_filter (true);
+#else /* !HAVE_LIBSECCOMP */
+	sandbox->dummy = 0;
+#endif /* HAVE_LIBSECCOMP */
+
+	return sandbox;
+}
+
+#ifdef HAVE_LIBSECCOMP
+static void _sandbox_load (man_sandbox *sandbox, bool permissive) {
+	if (can_load_seccomp ()) {
+		scmp_filter_ctx ctx;
+
+		if (permissive)
+			ctx = sandbox->permissive_ctx;
+		else
+			ctx = sandbox->ctx;
+		if (!ctx)
+			return;
+		debug ("loading seccomp filter (permissive: %d)\n",
+		       (int) permissive);
+		if (seccomp_load (ctx) < 0) {
+			if (errno == EINVAL || errno == EFAULT) {
+				/* The kernel doesn't give us particularly
+				 * fine-grained errors.  EINVAL could in
+				 * theory be an invalid BPF program, but
+				 * it's much more likely that the running
+				 * kernel doesn't support seccomp filtering.
+				 * EFAULT normally means a programming
+				 * error, but it could also be returned here
+				 * by some versions of qemu-user
+				 * (https://bugs.launchpad.net/bugs/1726394).
+				 */
+				gripe_seccomp_filter_unavailable ();
+				/* Don't try this again. */
+				seccomp_filter_unavailable = true;
+			} else
+				fatal (errno, "can't load seccomp filter");
+		}
+	}
+}
+#else /* !HAVE_LIBSECCOMP */
+static void _sandbox_load (man_sandbox *sandbox MAYBE_UNUSED,
+			   bool permissive MAYBE_UNUSED)
+{
+}
+#endif /* HAVE_LIBSECCOMP */
+
+/* Enter a sandbox for processing untrusted data. */
+void sandbox_load (void *data)
+{
+	man_sandbox *sandbox = data;
+
+	_sandbox_load (sandbox, false);
+}
+
+/* Enter a sandbox for processing untrusted data, allowing limited file
+ * creation.
+ */
+void sandbox_load_permissive (void *data)
+{
+	man_sandbox *sandbox = data;
+
+	_sandbox_load (sandbox, true);
+}
+
+/* Free a sandbox for processing untrusted data. */
+void sandbox_free (void *data) {
+	man_sandbox *sandbox = data;
+
+#ifdef HAVE_LIBSECCOMP
+	if (sandbox->ctx)
+		seccomp_release (sandbox->ctx);
+	if (sandbox->permissive_ctx)
+		seccomp_release (sandbox->permissive_ctx);
+#endif /* HAVE_LIBSECCOMP */
+
+	free (sandbox);
+}
diff --git a/lib/sandbox.h b/lib/sandbox.h
new file mode 100644
index 0000000..cb482ec
--- /dev/null
+++ b/lib/sandbox.h
@@ -0,0 +1,38 @@
+/*
+ * sandbox.h: Interface to process sandboxing
+ *
+ * Copyright (C) 2017 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef MAN_SANDBOX_H
+#define MAN_SANDBOX_H
+
+struct man_sandbox;
+typedef struct man_sandbox man_sandbox;
+
+extern man_sandbox *sandbox_init (void);
+
+/* These functions take a man_sandbox * argument, but have more generic
+ * types suitable for use with pipecmd_pre_exec.
+ */
+extern void sandbox_load (void *data);
+extern void sandbox_load_permissive (void *data);
+extern void sandbox_free (void *data);
+
+#endif /* MAN_SANDBOX_H */
diff --git a/lib/security.c b/lib/security.c
new file mode 100644
index 0000000..92cccc3
--- /dev/null
+++ b/lib/security.c
@@ -0,0 +1,177 @@
+/*
+ * security.c: Routines to aid secure uid operations
+ *
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2003, 2004, 2007, 2010, 2011 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Mon Aug  8 20:35:30 BST 1994  Wilf. (G.Wilford@ee.surrey.ac.uk)
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+#include <sys/types.h>
+
+#include "attribute.h"
+#include "error.h"
+#include "gettext.h"
+#define _(String) gettext (String)
+
+#include "manconfig.h"
+
+#include "cleanup.h"
+#include "debug.h"
+#include "fatal.h"
+#include "security.h"
+
+#ifdef MAN_OWNER
+
+   /*
+    * This is the name of the user that the preformatted man pages belong to.
+    * If you are running man as a setuid program, you should make sure
+    * that all of the cat pages and the directories that
+    * they live in are writeable by this user.
+    */
+
+#  include <pwd.h>
+#  include <unistd.h>
+
+#  include "idpriv.h"
+
+uid_t ruid;				/* initial real user id */
+uid_t euid;				/* initial effective user id */
+uid_t uid;				/* current euid */
+gid_t rgid;				/* initial real group id */
+gid_t egid;				/* initial effective group id */
+gid_t gid;				/* current egid */
+
+static struct passwd *man_owner;
+
+/* Keep a count of how many times we've dropped privileges, and only regain
+ * them if regain_effective_privs() is called an equal number of times.
+ */
+static int priv_drop_count = 0;
+
+static void gripe_set_euid (void)
+{
+	fatal (errno, _("can't set effective uid"));
+}
+
+#endif /* MAN_OWNER */
+
+void init_security (void)
+{
+#ifdef MAN_OWNER
+	ruid = getuid ();
+	uid = euid = geteuid ();
+	debug ("ruid=%d, euid=%d\n", (int) ruid, (int) euid);
+	rgid = getgid ();
+	gid = egid = getegid ();
+	debug ("rgid=%d, egid=%d\n", (int) rgid, (int) egid);
+	priv_drop_count = 0;
+	drop_effective_privs ();
+#endif /* MAN_OWNER */
+}
+
+bool ATTRIBUTE_PURE running_setuid (void)
+{
+#ifdef MAN_OWNER
+	return ruid != euid;
+#else /* !MAN_OWNER */
+	return false;
+#endif
+}
+
+#ifdef MAN_OWNER
+/* Return a pointer to the password entry structure for MAN_OWNER. This
+ * structure will be statically stored.
+ */
+struct passwd *get_man_owner (void)
+{
+	if (man_owner)
+		return man_owner;
+
+	man_owner = getpwnam (MAN_OWNER);
+	if (!man_owner)
+		error (FAIL, 0, _("the setuid man user \"%s\" does not exist"),
+		       MAN_OWNER);
+	assert (man_owner);
+	return man_owner;
+}
+#endif /* MAN_OWNER */
+
+/*
+ * function to gain user privs by either (a) dropping effective privs
+ * completely (saved ids) or (b) reversing euid w/ uid.
+ * Ignore if superuser.
+ */
+void drop_effective_privs (void)
+{
+#ifdef MAN_OWNER
+	if (uid != ruid) {
+		debug ("drop_effective_privs()\n");
+		if (idpriv_temp_drop ())
+			gripe_set_euid ();
+		uid = ruid;
+		gid = rgid;
+	}
+
+	priv_drop_count++;
+#endif /* MAN_OWNER */
+}
+
+/*
+ * function to (re)gain setuid privs by (a) setting euid from suid or (b)
+ * (re)reversing uid w/ euid. Ignore if superuser.
+ */
+void regain_effective_privs (void)
+{
+#ifdef MAN_OWNER
+	if (priv_drop_count) {
+		priv_drop_count--;
+		if (priv_drop_count)
+			return;
+	}
+
+	if (uid != euid) {
+		debug ("regain_effective_privs()\n");
+		if (idpriv_temp_restore ())
+			gripe_set_euid ();
+
+		uid = euid;
+		gid = egid;
+	}
+#endif /* MAN_OWNER */
+}
+
+/* Pipeline command pre-exec hook to permanently drop privileges. */
+void drop_privs (void *data MAYBE_UNUSED)
+{
+#ifdef MAN_OWNER
+	if (idpriv_drop ())
+		gripe_set_euid ();
+#endif /* MAN_OWNER */
+}
diff --git a/lib/security.h b/lib/security.h
new file mode 100644
index 0000000..3edf50b
--- /dev/null
+++ b/lib/security.h
@@ -0,0 +1,38 @@
+/*
+ * security.h: Interface to secure uid operations
+ *
+ * Copyright (C) 1990, 1991 John W. Eaton.
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002, 2004, 2008, 2010, 2011 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <stdbool.h>
+#ifdef MAN_OWNER
+#  include <pwd.h>
+#endif /* MAN_OWNER */
+
+/* security.c */
+extern void drop_effective_privs (void);
+extern void regain_effective_privs (void);
+extern void drop_privs (void *data);
+extern void init_security (void);
+extern bool running_setuid (void);
+#ifdef MAN_OWNER
+extern struct passwd *get_man_owner (void);
+#endif /* MAN_OWNER */
diff --git a/lib/tempfile.c b/lib/tempfile.c
new file mode 100644
index 0000000..5d8847c
--- /dev/null
+++ b/lib/tempfile.c
@@ -0,0 +1,94 @@
+/* tempfile.c: handle temporary directory creation (formerly also temporary
+ * files but this is no longer used).
+ *
+ * Copyright (C) 2001, 2003, 2007, 2009, 2011 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "attribute.h"
+#include "xvasprintf.h"
+
+#include "manconfig.h"
+
+#include "tempfile.h"
+
+static bool ATTRIBUTE_PURE running_setid (void)
+{
+#ifdef HAVE_GETUID
+	return getuid () != geteuid () || getgid () != getegid ();
+#else /* !HAVE_GETUID */
+	return false;
+#endif /* HAVE_GETUID */
+}
+
+static const char *path_search (void)
+{
+	const char *dir = NULL;
+
+	if (running_setid ()) {
+		dir = getenv ("TMPDIR");
+		if (!dir || !CAN_ACCESS (dir, W_OK))
+			dir = NULL;
+		if (!dir) {
+			dir = getenv ("TMP");
+			if (!dir || !CAN_ACCESS (dir, W_OK))
+				dir = NULL;
+		}
+	}
+#ifdef P_tmpdir
+	if (!dir) {
+		dir = P_tmpdir;
+		if (!dir || !CAN_ACCESS (dir, W_OK))
+			dir = NULL;
+	}
+#endif
+	if (!dir) {
+		dir = "/tmp";
+		if (!CAN_ACCESS (dir, W_OK))
+			dir = NULL;
+	}
+
+	return dir;
+}
+
+/* Get a sane temporary directory, looking in $TMPDIR, P_tmpdir, and finally
+ * /tmp.
+ */
+char *create_tempdir (const char *template)
+{
+	const char *dir = path_search ();
+	char *created_dirname;
+
+	if (!dir)
+		return NULL;
+	created_dirname = xasprintf ("%s/%sXXXXXX", dir, template);
+	assert (created_dirname);
+	if (!mkdtemp (created_dirname))
+		return NULL;
+	return created_dirname;
+}
diff --git a/lib/tempfile.h b/lib/tempfile.h
new file mode 100644
index 0000000..1a4a64c
--- /dev/null
+++ b/lib/tempfile.h
@@ -0,0 +1,24 @@
+/* tempfile.h: interface to temporary directory creation
+ *
+ * Copyright (C) 2001-2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "attribute.h"
+
+NODISCARD extern char *create_tempdir (const char *template);
diff --git a/lib/util.c b/lib/util.c
new file mode 100644
index 0000000..28a4487
--- /dev/null
+++ b/lib/util.c
@@ -0,0 +1,274 @@
+/*
+ * util.c
+ *
+ * Copyright (C) 1990, 1991 John W. Eaton.
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001, 2002, 2004, 2007, 2008, 2010 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * John W. Eaton
+ * jwe@che.utexas.edu
+ * Department of Chemical Engineering
+ * The University of Texas at Austin
+ * Austin, Texas  78712
+ *
+ * Wed May  4 15:44:47 BST 1994 Wilf. (G.Wilford@ee.surrey.ac.uk): slight
+ * changes to all routines, mainly cosmetic.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <assert.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <locale.h>
+
+#include "attribute.h"
+#include "stat-time.h"
+#include "timespec.h"
+#include "xalloc.h"
+#include "xstrndup.h"
+#include "xvasprintf.h"
+
+#include "gettext.h"
+
+#include "manconfig.h"
+
+#include "debug.h"
+#include "error.h"
+#include "util.h"
+
+/*
+ * Does file a have a different timestamp to file b?
+ *
+ * case:
+ *
+ *   a is man_page, b is cat_page
+ *
+ *   a and b have different times  returns  1/3  (ret & 1) == 1
+ *   a and b have same times       returns  0/2  (!(ret & 1)) == 1
+ *   a is zero in length           returns  + 2 (for Wilf. and his stray cats)
+ *   b is zero in length           returns  + 4
+ *   stat on a fails               returns   -1
+ *   stat on b fails               returns   -2
+ *   stat on a and b fails         returns   -3
+ */
+int is_changed (const char *fa, const char *fb)
+{
+	struct stat fa_sb;
+	struct stat fb_sb;
+	int fa_stat;
+	int fb_stat;
+	int status = 0;
+
+	debug ("is_changed: a=%s, b=%s", fa, fb);
+
+	fa_stat = stat (fa, &fa_sb);
+	if (fa_stat != 0)
+		status = 1;
+
+	fb_stat = stat (fb, &fb_sb);
+	if (fb_stat != 0)
+		status |= 2;
+
+	if (status != 0) {
+		debug (" (%d)\n", -status);
+		return -status;
+	}
+
+	if (fa_sb.st_size == 0)
+		status |= 2;
+
+	if (fb_sb.st_size == 0)
+		status |= 4;
+
+	status |= (timespec_cmp (get_stat_mtime (&fa_sb),
+				 get_stat_mtime (&fb_sb)) != 0);
+
+	debug (" (%d)\n", status);
+	return status;
+}
+
+/*
+ * Is path a directory?
+ */
+int is_directory (const char *path)
+{
+	struct stat sb;
+	int status;
+
+	status = stat (path, &sb);
+
+	if (status != 0)
+		return status;
+
+	return ((sb.st_mode & S_IFDIR) != 0);
+}
+
+/* Escape dangerous metacharacters before dumping into a shell command. */
+char *escape_shell (const char *unesc)
+{
+	char *esc, *escp;
+	const char *unescp;
+
+	if (!unesc)
+		return NULL;
+
+	escp = esc = xmalloc (strlen (unesc) * 2 + 1);
+	for (unescp = unesc; *unescp; unescp++)
+		if ((*unescp >= '0' && *unescp <= '9') ||
+		    (*unescp >= 'A' && *unescp <= 'Z') ||
+		    (*unescp >= 'a' && *unescp <= 'z') ||
+		    strchr (",-./:@_", *unescp))
+			*escp++ = *unescp;
+		else {
+			*escp++ = '\\';
+			*escp++ = *unescp;
+		}
+	*escp = 0;
+	return esc;
+}
+
+/* Remove a directory and all files in it.  Only recurse beyond that if
+ * RECURSE is set.
+ */
+int remove_directory (const char *directory, bool recurse)
+{
+	DIR *handle = opendir (directory);
+	struct dirent *entry;
+
+	if (!handle)
+		return -1;
+	while ((entry = readdir (handle)) != NULL) {
+		struct stat st;
+		char *path;
+
+		if (STREQ (entry->d_name, ".") || STREQ (entry->d_name, ".."))
+			continue;
+		path = xasprintf ("%s/%s", directory, entry->d_name);
+		assert (path);
+		if (stat (path, &st) == -1) {
+			free (path);
+			closedir (handle);
+			return -1;
+		}
+		if (recurse && S_ISDIR (st.st_mode)) {
+			if (remove_directory (path, recurse) == -1) {
+				free (path);
+				closedir (handle);
+				return -1;
+			}
+		} else if (S_ISREG (st.st_mode)) {
+			if (unlink (path) == -1) {
+				free (path);
+				closedir (handle);
+				return -1;
+			}
+		}
+		free (path);
+	}
+	closedir (handle);
+
+	if (rmdir (directory) == -1)
+		return -1;
+	return 0;
+}
+
+/* Returns an allocated copy of s, with leading and trailing spaces
+ * removed.
+ */
+char * ATTRIBUTE_MALLOC trim_spaces (const char *s)
+{
+	int length;
+	while (*s == ' ')
+		++s;
+	length = strlen (s);
+	while (length && s[length - 1] == ' ')
+		--length;
+	return xstrndup (s, length);
+}
+
+char *lang_dir (const char *filename)
+{
+	char *ld;	/* the lang dir: point to static data */
+	const char *fm;	/* the first "/man/" dir */
+	const char *sm;	/* the second "/man?/" dir */
+
+	ld = xstrdup ("");
+	if (!filename)
+		return ld;
+
+	/* Check whether filename is in a man page hierarchy. */
+	if (STRNEQ (filename, "man/", 4))
+		fm = filename;
+	else {
+		fm = strstr (filename, "/man/");
+		if (fm)
+			++fm;
+	}
+	if (!fm)
+		return ld;
+	sm = strstr (fm + 2, "/man");
+	if (!sm)
+		return ld;
+	if (sm[5] != '/')
+		return ld;
+	if (!strchr ("123456789lno", sm[4]))
+		return ld;
+
+	/* If there's no lang dir element, it's an English man page. */
+	if (sm == fm + 3) {
+		free (ld);
+		return xstrdup ("C");
+	}
+
+	/* found a lang dir */
+	fm += 4;
+	sm = strchr (fm, '/');
+	if (!sm)
+		return ld;
+	free (ld);
+	ld = xstrndup (fm, sm - fm);
+	debug ("found lang dir element %s\n", ld);
+	return ld;
+}
+
+void init_locale (void)
+{
+	char *locale = setlocale (LC_ALL, "");
+	if (!locale &&
+	    !getenv ("MAN_NO_LOCALE_WARNING") &&
+	    !getenv ("DPKG_RUNNING_VERSION"))
+		/* Obviously can't translate this. */
+		error (0, 0, "can't set the locale; make sure $LC_* and $LANG "
+			     "are correct");
+	setenv ("MAN_NO_LOCALE_WARNING", "1", 1);
+#ifdef ENABLE_NLS
+	bindtextdomain (PACKAGE, LOCALEDIR);
+	bindtextdomain (PACKAGE "-gnulib", LOCALEDIR);
+	textdomain (PACKAGE);
+#endif /* ENABLE_NLS */
+}
diff --git a/lib/util.h b/lib/util.h
new file mode 100644
index 0000000..aec8d17
--- /dev/null
+++ b/lib/util.h
@@ -0,0 +1,33 @@
+/*
+ * util.h
+ *
+ * Copyright (C) 1990, 1991 John W. Eaton.
+ * Copyright (C) 1994, 1995 Graeme W. Wilford. (Wilf.)
+ * Copyright (C) 2001-2022 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <stdbool.h>
+
+extern int is_changed (const char *fa, const char *fb);
+extern int is_directory (const char *path);
+extern char *escape_shell (const char *unesc);
+extern int remove_directory (const char *directory, bool recurse);
+extern char *trim_spaces (const char *s);
+extern char *lang_dir (const char *filename);
+extern void init_locale (void);
diff --git a/lib/wordfnmatch.c b/lib/wordfnmatch.c
new file mode 100644
index 0000000..b073a88
--- /dev/null
+++ b/lib/wordfnmatch.c
@@ -0,0 +1,66 @@
+/*
+ * wordfnmatch.c: fnmatch on word boundaries
+ *
+ * Copyright (C) 2001, 2003, 2008 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+#include "fnmatch.h"
+#include "xalloc.h"
+
+#include "manconfig.h"
+
+#include "wordfnmatch.h"
+
+/* TODO: How on earth do we allow multiple-word matches without
+ * reimplementing fnmatch()?
+ */
+bool word_fnmatch (const char *pattern, const char *string)
+{
+	char *dupstring = xstrdup (string);
+	const char *begin = dupstring;
+	char *p;
+
+	for (p = dupstring; *p; p++) {
+		if (CTYPE (isalpha, *p) || *p == '_')
+			continue;
+
+		/* Check for multiple non-word characters in a row. */
+		if (p <= begin + 1)
+			begin++;
+		else {
+			*p = '\0';
+			if (fnmatch (pattern, begin, FNM_CASEFOLD) == 0) {
+				free (dupstring);
+				return true;
+			}
+			begin = p + 1;
+		}
+	}
+
+	free (dupstring);
+	return false;
+}
diff --git a/lib/wordfnmatch.h b/lib/wordfnmatch.h
new file mode 100644
index 0000000..82e7cf7
--- /dev/null
+++ b/lib/wordfnmatch.h
@@ -0,0 +1,25 @@
+/*
+ * wordfnmatch.h: interface to fnmatch on word boundaries
+ *
+ * Copyright (C) 2001, 2003, 2008 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <stdbool.h>
+
+bool word_fnmatch (const char *lowpattern, const char *string);
diff --git a/lib/xregcomp.c b/lib/xregcomp.c
new file mode 100644
index 0000000..d8e1f18
--- /dev/null
+++ b/lib/xregcomp.c
@@ -0,0 +1,52 @@
+/*
+ * xregcomp.c: regcomp with error checking
+ *
+ * Copyright (C) 2008 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif /* HAVE_CONFIG_H */
+
+#include <stddef.h>
+
+#include "regex.h"
+
+#include "gettext.h"
+#include <locale.h>
+#define _(String) gettext (String)
+
+#include "manconfig.h"
+
+#include "fatal.h"
+#include "xalloc.h"
+#include "xregcomp.h"
+
+void xregcomp (regex_t *preg, const char *regex, int cflags)
+{
+	int err = regcomp (preg, regex, cflags);
+	if (err) {
+		size_t errstrsize;
+		char *errstr;
+		errstrsize = regerror (err, preg, NULL, 0);
+		errstr = xmalloc (errstrsize);
+		regerror (err, preg, errstr, errstrsize);
+		fatal (0, _("fatal: regex `%s': %s"), regex, errstr);
+	}
+}
diff --git a/lib/xregcomp.h b/lib/xregcomp.h
new file mode 100644
index 0000000..ca34b44
--- /dev/null
+++ b/lib/xregcomp.h
@@ -0,0 +1,25 @@
+/*
+ * xregcomp.h: interface to regcomp with error checking
+ *
+ * Copyright (C) 2008 Colin Watson.
+ *
+ * This file is part of man-db.
+ *
+ * man-db 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * man-db 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 man-db; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include "regex.h"
+
+void xregcomp (regex_t *preg, const char *regex, int cflags);
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 15:19:27 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-07 15:19:27 +0000
commit	e0023883c6d2e6745a19e4b48e186ed156c1fca8 (patch)
tree	1a48b8056ec984385d0d862b683535d04d6ed215 /lib
parent	Initial commit. (diff)
download	man-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.tar.xz man-db-e0023883c6d2e6745a19e4b48e186ed156c1fca8.zip