diff options
Diffstat (limited to 'examples/loadables')
51 files changed, 10214 insertions, 0 deletions
diff --git a/examples/loadables/Makefile.in b/examples/loadables/Makefile.in new file mode 100644 index 0000000..956f018 --- /dev/null +++ b/examples/loadables/Makefile.in @@ -0,0 +1,335 @@ +# +# Simple makefile for the sample loadable builtins +# +# Copyright (C) 1996-2022 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +PACKAGE = @PACKAGE_NAME@ +VERSION = @PACKAGE_VERSION@ + +# Include some boilerplate Gnu makefile definitions. +prefix = @prefix@ + +exec_prefix = @exec_prefix@ +bindir = @bindir@ +libdir = @libdir@ +infodir = @infodir@ +includedir = @includedir@ + +datarootdir = @datarootdir@ + +loadablesdir = @loadablesdir@ +headersdir = @headersdir@ + +topdir = @top_srcdir@ +BUILD_DIR = @BUILD_DIR@ +srcdir = @srcdir@ +VPATH = @srcdir@ + +# Support an alternate destination root directory for package building +DESTDIR = + +INSTALL = @INSTALL@ +INSTALL_PROGRAM = @INSTALL_PROGRAM@ +INSTALL_SCRIPT = @INSTALL_SCRIPT@ +INSTALL_DATA = @INSTALL_DATA@ +INSTALLMODE= -m 0755 + +@SET_MAKE@ +CC = @CC@ +RM = rm -f + +SHELL = @MAKE_SHELL@ + +host_os = @host_os@ +host_cpu = @host_cpu@ +host_vendor = @host_vendor@ + +STYLE_CFLAGS = @STYLE_CFLAGS@ +CFLAGS = @CFLAGS@ +LOCAL_CFLAGS = @LOCAL_CFLAGS@ +DEFS = @DEFS@ +LOCAL_DEFS = @LOCAL_DEFS@ + +CPPFLAGS = @CPPFLAGS@ + +BASHINCDIR = ${topdir}/include + +SUPPORT_SRC = $(topdir)/support/ + +LIBBUILD = ${BUILD_DIR}/lib + +INTL_LIBSRC = ${topdir}/lib/intl +INTL_BUILDDIR = ${LIBBUILD}/intl +INTL_INC = @INTL_INC@ +LIBINTL_H = @LIBINTL_H@ + +CCFLAGS = $(DEFS) $(LOCAL_DEFS) $(LOCAL_CFLAGS) $(CPPFLAGS) $(CFLAGS) $(STYLE_CFLAGS) + +# +# These values are generated for configure by ${topdir}/support/shobj-conf. +# If your system is not supported by that script, but includes facilities for +# dynamic loading of shared objects, please update the script and send the +# changes to bash-maintainers@gnu.org. +# +SHOBJ_CC = @SHOBJ_CC@ +SHOBJ_CFLAGS = @SHOBJ_CFLAGS@ +SHOBJ_LD = @SHOBJ_LD@ +SHOBJ_LDFLAGS = @SHOBJ_LDFLAGS@ @LDFLAGS@ +SHOBJ_XLDFLAGS = @SHOBJ_XLDFLAGS@ +SHOBJ_LIBS = @SHOBJ_LIBS@ +SHOBJ_STATUS = @SHOBJ_STATUS@ + +INC = -I. -I.. -I$(topdir) -I$(topdir)/lib -I$(topdir)/builtins -I${srcdir} \ + -I$(BASHINCDIR) -I$(BUILD_DIR) -I$(LIBBUILD) \ + -I$(BUILD_DIR)/builtins $(INTL_INC) + +.c.o: + $(SHOBJ_CC) $(SHOBJ_CFLAGS) $(CCFLAGS) $(INC) -c -o $@ $< + + +ALLPROG = print truefalse sleep finfo logname basename dirname fdflags \ + tty pathchk tee head mkdir rmdir mkfifo mktemp printenv id whoami \ + uname sync push ln unlink realpath strftime mypid setpgid seq rm \ + accept csv dsv cut stat getconf +OTHERPROG = necho hello cat pushd asort + +all: $(SHOBJ_STATUS) + +supported: $(ALLPROG) +others: $(OTHERPROG) + +unsupported: + @echo "Your system (${host_os}) is not supported by the" + @echo "${topdir}/support/shobj-conf script." + @echo "If your operating system provides facilities for dynamic" + @echo "loading of shared objects using the dlopen(3) interface," + @echo "please update the script and re-run configure." + @echo "Please send the changes you made to bash-maintainers@gnu.org" + @echo "for inclusion in future bash releases." + +everything: supported others + +print: print.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ print.o $(SHOBJ_LIBS) + +necho: necho.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ necho.o $(SHOBJ_LIBS) + +hello: hello.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ hello.o $(SHOBJ_LIBS) + +truefalse: truefalse.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ truefalse.o $(SHOBJ_LIBS) + +accept: accept.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ accept.o $(SHOBJ_LIBS) + +sleep: sleep.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sleep.o $(SHOBJ_LIBS) + +finfo: finfo.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ finfo.o $(SHOBJ_LIBS) + +cat: cat.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cat.o $(SHOBJ_LIBS) + +rm: rm.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ rm.o $(SHOBJ_LIBS) + +fdflags: fdflags.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ fdflags.o $(SHOBJ_LIBS) + +seq: seq.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ seq.o $(SHOBJ_LIBS) + +logname: logname.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ logname.o $(SHOBJ_LIBS) + +basename: basename.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ basename.o $(SHOBJ_LIBS) + +dirname: dirname.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ dirname.o $(SHOBJ_LIBS) + +tty: tty.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tty.o $(SHOBJ_LIBS) + +pathchk: pathchk.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pathchk.o $(SHOBJ_LIBS) + +tee: tee.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ tee.o $(SHOBJ_LIBS) + +mkdir: mkdir.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mkdir.o $(SHOBJ_LIBS) + +rmdir: rmdir.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ rmdir.o $(SHOBJ_LIBS) + +mkfifo: mkfifo.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mkfifo.o $(SHOBJ_LIBS) + +mktemp: mktemp.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mktemp.o $(SHOBJ_LIBS) + +head: head.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ head.o $(SHOBJ_LIBS) + +printenv: printenv.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ printenv.o $(SHOBJ_LIBS) + +getconf: getconf.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ getconf.o $(SHOBJ_LIBS) + +id: id.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ id.o $(SHOBJ_LIBS) + +whoami: whoami.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ whoami.o $(SHOBJ_LIBS) + +uname: uname.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ uname.o $(SHOBJ_LIBS) + +sync: sync.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ sync.o $(SHOBJ_LIBS) + +push: push.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ push.o $(SHOBJ_LIBS) + +ln: ln.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ ln.o $(SHOBJ_LIBS) + +unlink: unlink.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ unlink.o $(SHOBJ_LIBS) + +realpath: realpath.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ realpath.o $(SHOBJ_LIBS) + +csv: csv.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ csv.o $(SHOBJ_LIBS) + +dsv: dsv.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ dsv.o $(SHOBJ_LIBS) + +cut: cut.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ cut.o $(SHOBJ_LIBS) + +strftime: strftime.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ strftime.o $(SHOBJ_LIBS) + +mypid: mypid.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ mypid.o $(SHOBJ_LIBS) + +setpgid: setpgid.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ setpgid.o $(SHOBJ_LIBS) + +stat: stat.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ stat.o $(SHOBJ_LIBS) + +asort: asort.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ asort.o $(SHOBJ_LIBS) + +# pushd is a special case. We use the same source that the builtin version +# uses, with special compilation options. +# +pushd.c: ${topdir}/builtins/pushd.def + $(RM) $@ + ${BUILD_DIR}/builtins/mkbuiltins -D ${topdir}/builtins ${topdir}/builtins/pushd.def + +pushd.o: pushd.c + $(RM) $@ + $(SHOBJ_CC) -Wno-format-security -DHAVE_CONFIG_H -DPUSHD_AND_POPD -DLOADABLE_BUILTIN $(SHOBJ_CFLAGS) $(CFLAGS) $(CPPFLAGS) $(INC) -c -o $@ $< + +pushd: pushd.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ pushd.o $(SHOBJ_LIBS) + +clean: + $(RM) $(ALLPROG) $(OTHERPROG) *.o + -( cd perl && ${MAKE} ${MFLAGS} $@ ) + +mostlyclean: clean + -( cd perl && ${MAKE} ${MFLAGS} $@ ) + +distclean maintainer-clean: clean + $(RM) Makefile Makefile.inc Makefile.sample pushd.c + -( cd perl && ${MAKE} ${MFLAGS} $@ ) + +installdirs: + @${SHELL} $(SUPPORT_SRC)mkinstalldirs $(DESTDIR)$(loadablesdir) + +install-dev: installdirs + @$(INSTALL_DATA) Makefile.inc $(DESTDIR)$(loadablesdir)/Makefile.inc + @$(INSTALL_DATA) Makefile.sample $(DESTDIR)$(loadablesdir)/Makefile.sample + @$(INSTALL_DATA) $(srcdir)/loadables.h $(DESTDIR)$(loadablesdir)/loadables.h + @( cd $(BUILD_DIR) && ${MAKE} ${MFLAGS} DESTDIR="$(DESTDIR)" install-headers) + +install-supported: all installdirs install-dev + @echo installing example loadable builtins in $(DESTDIR)${loadablesdir} + @for prog in ${ALLPROG}; do \ + echo $$prog ; \ + $(INSTALL_PROGRAM) $(INSTALLMODE) $$prog $(DESTDIR)$(loadablesdir)/$$prog ;\ + done + +uninstall-dev: + -$(RM) $(DESTDIR)$(loadablesdir)/Makefile.inc $(DESTDIR)$(loadablesdir)/Makefile.sample + -$(RM) $(DESTDIR)$(loadablesdir)/loadables.h + -( cd $(BUILD_DIR) && ${MAKE} ${MFLAGS} DESTDIR="$(DESTDIR)" uninstall-headers) + +uninstall-supported: uninstall-dev + -( cd $(DESTDIR)${loadablesdir} && $(RM) ${ALLPROG} ) + +install-unsupported: +uninstall-unsupported: + +install: install-$(SHOBJ_STATUS) +uninstall: uninstall-$(SHOBJ_STATUS) + +print.o: print.c +truefalse.o: truefalse.c +accept.o: accept.c +sleep.o: sleep.c +finfo.o: finfo.c +getconf.o: getconf.c getconf.h +logname.o: logname.c +basename.o: basename.c +dirname.o: dirname.c +tty.o: tty.c +pathchk.o: pathchk.c +tee.o: tee.c +head.o: head.c +rmdir.o: rmdir.c +necho.o: necho.c +hello.o: hello.c +cat.o: cat.c +csv.o: csv.c +dsv.o: dsv.c +cut.o: cut.c +printenv.o: printenv.c +id.o: id.c +whoami.o: whoami.c +uname.o: uname.c +sync.o: sync.c +push.o: push.c +mkdir.o: mkdir.c +mktemp.o: mktemp.c +realpath.o: realpath.c +strftime.o: strftime.c +setpgid.o: setpgid.c +stat.o: stat.c +fdflags.o: fdflags.c +seq.o: seq.c +asort.o: asort.c diff --git a/examples/loadables/Makefile.inc.in b/examples/loadables/Makefile.inc.in new file mode 100644 index 0000000..ee3c303 --- /dev/null +++ b/examples/loadables/Makefile.inc.in @@ -0,0 +1,101 @@ +# +# Sample makefile for bash loadable builtin development +# +# Copyright (C) 2015-2022 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +PACKAGE = @PACKAGE_NAME@ +VERSION = @PACKAGE_VERSION@ + +PACKAGE_NAME = @PACKAGE_NAME@ +PACKAGE_VERSION = @PACKAGE_VERSION@ + +# Include some boilerplate Gnu makefile definitions. +prefix = @prefix@ + +exec_prefix = @exec_prefix@ +bindir = @bindir@ +libdir = @libdir@ +infodir = @infodir@ +includedir = @includedir@ + +datarootdir = @datarootdir@ + +loadablesdir = @loadablesdir@ +headersdir = @headersdir@ + +topdir = @top_srcdir@ +BUILD_DIR = @BUILD_DIR@ +srcdir = @srcdir@ +VPATH = @srcdir@ + +# Support an alternate destination root directory for package building +DESTDIR = + +INSTALL = @INSTALL@ +INSTALL_PROGRAM = @INSTALL_PROGRAM@ +INSTALL_SCRIPT = @INSTALL_SCRIPT@ +INSTALL_DATA = @INSTALL_DATA@ +INSTALLMODE= -m 0755 + +@SET_MAKE@ +CC = @CC@ +RM = rm -f + +SHELL = @MAKE_SHELL@ + +host_os = @host_os@ +host_cpu = @host_cpu@ +host_vendor = @host_vendor@ + +CFLAGS = @CFLAGS@ +LOCAL_CFLAGS = @LOCAL_CFLAGS@ +DEFS = @DEFS@ +LOCAL_DEFS = @LOCAL_DEFS@ + +CPPFLAGS = @CPPFLAGS@ + +BASHINCDIR = ${topdir}/include + +SUPPORT_SRC = $(topdir)/support/ + +LIBBUILD = ${BUILD_DIR}/lib + +INTL_LIBSRC = ${topdir}/lib/intl +INTL_BUILDDIR = ${LIBBUILD}/intl +INTL_INC = @INTL_INC@ +LIBINTL_H = @LIBINTL_H@ + +CCFLAGS = $(DEFS) $(LOCAL_DEFS) $(LOCAL_CFLAGS) $(CFLAGS) + +# +# These values are generated for configure by ${topdir}/support/shobj-conf. +# If your system is not supported by that script, but includes facilities for +# dynamic loading of shared objects, please update the script and send the +# changes to bash-maintainers@gnu.org. +# +SHOBJ_CC = @SHOBJ_CC@ +SHOBJ_CFLAGS = @SHOBJ_CFLAGS@ +SHOBJ_LD = @SHOBJ_LD@ +SHOBJ_LDFLAGS = @SHOBJ_LDFLAGS@ @LDFLAGS@ +SHOBJ_XLDFLAGS = @SHOBJ_XLDFLAGS@ +SHOBJ_LIBS = @SHOBJ_LIBS@ +SHOBJ_STATUS = @SHOBJ_STATUS@ + +INC = -I$(headersdir) -I$(headersdir)/include -I$(headersdir)/builtins + +.c.o: + $(SHOBJ_CC) $(SHOBJ_CFLAGS) $(CCFLAGS) $(INC) -c -o $@ $< diff --git a/examples/loadables/Makefile.sample.in b/examples/loadables/Makefile.sample.in new file mode 100644 index 0000000..fe9b06a --- /dev/null +++ b/examples/loadables/Makefile.sample.in @@ -0,0 +1,44 @@ +# +# Sample makefile for bash loadable builtin development +# +# Copyright (C) 2022 Free Software Foundation, Inc. + +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# these should match the ones in Makefile.in (for the make install target) + +prefix = @prefix@ +exec_prefix = @exec_prefix@ +libdir = @libdir@ + +# ${loadablesdir} is where the example loadable builtins and data files +# are installed (make install target in Makefile.in) + +loadablesdir = @loadablesdir@ +DESTDIR = + +# include Makefile.inc for all boilerplate definitions + +include $(DESTDIR)$(loadablesdir)/Makefile.inc + +# here, `example' is the name of the shared object +# replace `example' with the appropriate filename + +all: example + +example: example.o + $(SHOBJ_LD) $(SHOBJ_LDFLAGS) $(SHOBJ_XLDFLAGS) -o $@ example.o $(SHOBJ_LIBS) + +example.o: example.c diff --git a/examples/loadables/README b/examples/loadables/README new file mode 100644 index 0000000..c729a6a --- /dev/null +++ b/examples/loadables/README @@ -0,0 +1,82 @@ +Some examples of ready-to-dynamic-load builtins. Most of the +examples given are reimplementations of standard commands whose +execution time is dominated by process startup time. Some +exceptions are sleep, which allows you to sleep for fractions +of a second, finfo, which provides access to the rest of the +elements of the `stat' structure that `test' doesn't let you +see, csv, which allows you to manipulate data from comma-separated +values files, fdflags, which lets you change the flags associated +with one of the shell's file descriptors, and pushd/popd/dirs, which +allows you to compile them out of the shell. + +All of the new builtins in ksh93 that bash didn't already have +are included here, as is the ksh `print' builtin. + +The configure script in the top-level source directory uses the +support/shobj-conf script to set the right values in the Makefile, +so you should not need to change the Makefile. If your system +is not supported by support/shobj-conf, and it has the necessary +facilities for building shared objects and support for the +dlopen/dlsyn/dlclose/dlerror family of functions, please make +the necessary changes to support/shobj-conf and send the changes +to bash-maintainers@gnu.org. + +Loadable builtins are loaded into a running shell with + + enable -f filename builtin-name + +enable uses a simple reference-counting scheme to avoid unloading a +shared object that implements more than one loadable builtin before +all loadable builtins implemented in the object are removed. + +Many of the details needed by builtin writers are found in hello.c, +the canonical example. There is no real `builtin writers' programming +guide'. The file template.c provides a template to use for creating +new loadable builtins. + +The file "Makefile.inc" is created using the same values that configure +writes into Makefile.in, and is installed in the same directory as the +rest of the example builtins. It's intended to be a start at something +that can be modified or included to help you build your own loadables +without having to search for the right CFLAGS and LDFLAGS. + +basename.c Return non-directory portion of pathname. +cat.c cat(1) replacement with no options - the way cat was intended. +csv.c Process a line of csv data and store it in an indexed array. +cut.c Cut out selected portions of each line of a file. +dirname.c Return directory portion of pathname. +fdflags.c Change the flag associated with one of bash's open file descriptors. +finfo.c Print file info. +head.c Copy first part of files. +hello.c Obligatory "Hello World" / sample loadable. +id.c POSIX.2 user identity. +ln.c Make links. +loadables.h File loadable builtins can include for shell definitions. +logname.c Print login name of current user. +Makefile.in Simple makefile for the sample loadable builtins. +Makefile.inc.in Sample makefile to use for loadable builtin development. +mkdir.c Make directories. +mkfifo.c Create named pipes. +mktemp.c Make unique temporary file name. +mypid.c Add $MYPID variable, demonstrate use of unload hook function. +necho.c echo without options or argument interpretation. +pathchk.c Check pathnames for validity and portability. +print.c Loadable ksh-93 style print builtin. +printenv.c Minimal builtin clone of BSD printenv(1). +push.c Anyone remember TOPS-20? +realpath.c Canonicalize pathnames, resolving symlinks. +rm.c Remove files and directories. +rmdir.c Remove directory. +seq.c Print a sequence of decimal or floating point numbers. +setpgid.c Set a process's pgrp; example of how to wrap a system call. +sleep.c sleep for fractions of a second. +stat.c populate an associative array with information about a file +strftime.c Loadable builtin interface to strftime(3). +sync.c Sync the disks by forcing pending filesystem writes to complete. +tee.c Duplicate standard input. +template.c Example template for loadable builtin. +truefalse.c True and false builtins. +tty.c Return terminal name. +uname.c Print system information. +unlink.c Remove a directory entry. +whoami.c Print out username of current user. diff --git a/examples/loadables/accept.c b/examples/loadables/accept.c new file mode 100644 index 0000000..ff98423 --- /dev/null +++ b/examples/loadables/accept.c @@ -0,0 +1,245 @@ +/* accept - listen for and accept a remote network connection on a given port */ + +/* + Copyright (C) 2020 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include "bashtypes.h" +#include <errno.h> +#include <time.h> +#include <limits.h> +#include "typemax.h" + +#include <sys/socket.h> +#include <arpa/inet.h> +#include <netinet/in.h> + +#include "loadables.h" + +static int accept_bind_variable (char *, int); + +int +accept_builtin (list) + WORD_LIST *list; +{ + SHELL_VAR *v; + intmax_t iport; + int opt; + char *tmoutarg, *fdvar, *rhostvar, *rhost, *bindaddr; + unsigned short uport; + int servsock, clisock; + struct sockaddr_in server, client; + socklen_t clientlen; + struct timeval timeval; + struct linger linger = { 0, 0 }; + + rhostvar = tmoutarg = fdvar = rhost = bindaddr = (char *)NULL; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "b:r:t:v:")) != -1) + { + switch (opt) + { + case 'b': + bindaddr = list_optarg; + break; + case 'r': + rhostvar = list_optarg; + break; + case 't': + tmoutarg = list_optarg; + break; + case 'v': + fdvar = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + + list = loptend; + + /* Validate input and variables */ + if (tmoutarg) + { + long ival, uval; + opt = uconvert (tmoutarg, &ival, &uval, (char **)0); + if (opt == 0 || ival < 0 || uval < 0) + { + builtin_error ("%s: invalid timeout specification", tmoutarg); + return (EXECUTION_FAILURE); + } + timeval.tv_sec = ival; + timeval.tv_usec = uval; + /* XXX - should we warn if ival == uval == 0 ? */ + } + + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + if (legal_number (list->word->word, &iport) == 0 || iport < 0 || iport > TYPE_MAXIMUM (unsigned short)) + { + builtin_error ("%s: invalid port number", list->word->word); + return (EXECUTION_FAILURE); + } + uport = (unsigned short)iport; + + if (fdvar == 0) + fdvar = "ACCEPT_FD"; + + unbind_variable (fdvar); + if (rhostvar) + unbind_variable (rhostvar); + + if ((servsock = socket (AF_INET, SOCK_STREAM, IPPROTO_IP)) < 0) + { + builtin_error ("cannot create socket: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + + memset ((char *)&server, 0, sizeof (server)); + server.sin_family = AF_INET; + server.sin_port = htons(uport); + server.sin_addr.s_addr = bindaddr ? inet_addr (bindaddr) : htonl(INADDR_ANY); + + if (server.sin_addr.s_addr == INADDR_NONE) + { + builtin_error ("invalid address: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + + opt = 1; + setsockopt (servsock, SOL_SOCKET, SO_REUSEADDR, (void *)&opt, sizeof (opt)); + setsockopt (servsock, SOL_SOCKET, SO_LINGER, (void *)&linger, sizeof (linger)); + + if (bind (servsock, (struct sockaddr *)&server, sizeof (server)) < 0) + { + builtin_error ("socket bind failure: %s", strerror (errno)); + close (servsock); + return (EXECUTION_FAILURE); + } + + if (listen (servsock, 1) < 0) + { + builtin_error ("listen failure: %s", strerror (errno)); + close (servsock); + return (EXECUTION_FAILURE); + } + + if (tmoutarg) + { + fd_set iofds; + + FD_ZERO(&iofds); + FD_SET(servsock, &iofds); + + opt = select (servsock+1, &iofds, 0, 0, &timeval); + if (opt < 0) + builtin_error ("select failure: %s", strerror (errno)); + if (opt <= 0) + { + close (servsock); + return (EXECUTION_FAILURE); + } + } + + clientlen = sizeof (client); + if ((clisock = accept (servsock, (struct sockaddr *)&client, &clientlen)) < 0) + { + builtin_error ("client accept failure: %s", strerror (errno)); + close (servsock); + return (EXECUTION_FAILURE); + } + + close (servsock); + + accept_bind_variable (fdvar, clisock); + if (rhostvar) + { + rhost = inet_ntoa (client.sin_addr); + v = builtin_bind_variable (rhostvar, rhost, 0); + if (v == 0 || readonly_p (v) || noassign_p (v)) + builtin_error ("%s: cannot set variable", rhostvar); + } + + return (EXECUTION_SUCCESS); +} + +static int +accept_bind_variable (varname, intval) + char *varname; + int intval; +{ + SHELL_VAR *v; + char ibuf[INT_STRLEN_BOUND (int) + 1], *p; + + p = fmtulong (intval, 10, ibuf, sizeof (ibuf), 0); + v = builtin_bind_variable (varname, p, 0); /* XXX */ + if (v == 0 || readonly_p (v) || noassign_p (v)) + builtin_error ("%s: cannot set variable", varname); + return (v != 0); +} + +char *accept_doc[] = { + "Accept a network connection on a specified port.", + "" + "This builtin allows a bash script to act as a TCP/IP server.", + "", + "Options, if supplied, have the following meanings:", + " -b address use ADDRESS as the IP address to listen on; the", + " default is INADDR_ANY", + " -t timeout wait TIMEOUT seconds for a connection. TIMEOUT may", + " be a decimal number including a fractional portion", + " -v varname store the numeric file descriptor of the connected", + " socket into VARNAME. The default VARNAME is ACCEPT_FD", + " -r rhost store the IP address of the remote host into the shell", + " variable RHOST, in dotted-decimal notation", + "", + "If successful, the shell variable ACCEPT_FD, or the variable named by the", + "-v option, will be set to the fd of the connected socket, suitable for", + "use as 'read -u$ACCEPT_FD'. RHOST, if supplied, will hold the IP address", + "of the remote client. The return status is 0.", + "", + "On failure, the return status is 1 and ACCEPT_FD (or VARNAME) and RHOST,", + "if supplied, will be unset.", + "", + "The server socket fd will be closed before accept returns.", + (char *) NULL +}; + +struct builtin accept_struct = { + "accept", /* builtin name */ + accept_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + accept_doc, /* array of long documentation strings. */ + "accept [-b address] [-t timeout] [-v varname] [-r addrvar ] port", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/asort.c b/examples/loadables/asort.c new file mode 100644 index 0000000..e847ef8 --- /dev/null +++ b/examples/loadables/asort.c @@ -0,0 +1,279 @@ +/* + Copyright (C) 2020 Free Software Foundation, Inc. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ +#include <stdlib.h> +#include <string.h> +#include <inttypes.h> + +#include "bashtypes.h" +#include "shell.h" +#include "builtins.h" +#include "common.h" +#include "xmalloc.h" +#include "bashgetopt.h" + +typedef struct sort_element { + ARRAY_ELEMENT *v; // used when sorting array in-place + char *key; // used when sorting assoc array + char *value; // points to value of array element or assoc entry + double num; // used for numeric sort +} sort_element; + +static int reverse_flag; +static int numeric_flag; + +static int +compare(const void *p1, const void *p2) { + const sort_element e1 = *(sort_element *) p1; + const sort_element e2 = *(sort_element *) p2; + + if (numeric_flag) { + if (reverse_flag) + return (e2.num > e1.num) ? 1 : (e2.num < e1.num) ? -1 : 0; + else + return (e1.num > e2.num) ? 1 : (e1.num < e2.num) ? -1 : 0; + } + else { + if (reverse_flag) + return strcoll(e2.value, e1.value); + else + return strcoll(e1.value, e2.value); + } +} + +static int +sort_index(SHELL_VAR *dest, SHELL_VAR *source) { + HASH_TABLE *hash; + BUCKET_CONTENTS *bucket; + sort_element *sa; + ARRAY *array, *dest_array; + ARRAY_ELEMENT *ae; + size_t i, j, n; + char ibuf[INT_STRLEN_BOUND (intmax_t) + 1]; // used by fmtulong + char *key; + + dest_array = array_cell(dest); + + if (assoc_p(source)) { + hash = assoc_cell(source); + n = hash->nentries; + sa = xmalloc(n * sizeof(sort_element)); + i = 0; + for ( j = 0; j < hash->nbuckets; ++j ) { + bucket = hash->bucket_array[j]; + while ( bucket ) { + sa[i].v = NULL; + sa[i].key = bucket->key; + if ( numeric_flag ) + sa[i].num = strtod(bucket->data, NULL); + else + sa[i].value = bucket->data; + i++; + bucket = bucket->next; + } + } + } + else { + array = array_cell(source); + n = array_num_elements(array); + sa = xmalloc(n * sizeof(sort_element)); + i = 0; + + for (ae = element_forw(array->head); ae != array->head; ae = element_forw(ae)) { + sa[i].v = ae; + if (numeric_flag) + sa[i].num = strtod(element_value(ae), NULL); + else + sa[i].value = element_value(ae); + i++; + } + } + + // sanity check + if ( i != n ) { + builtin_error("%s: corrupt array", source->name); + return EXECUTION_FAILURE; + } + + qsort(sa, n, sizeof(sort_element), compare); + + array_flush(dest_array); + + for ( i = 0; i < n; ++i ) { + if ( assoc_p(source) ) + key = sa[i].key; + else + key = fmtulong((long unsigned)sa[i].v->ind, 10, ibuf, sizeof(ibuf), 0); + + array_insert(dest_array, i, key); + } + + return EXECUTION_SUCCESS; +} + +static int +sort_inplace(SHELL_VAR *var) { + size_t i, n; + ARRAY *a; + ARRAY_ELEMENT *ae; + sort_element *sa = 0; + + a = array_cell(var); + n = array_num_elements(a); + + if ( n == 0 ) + return EXECUTION_SUCCESS; + + sa = xmalloc(n * sizeof(sort_element)); + + i = 0; + for (ae = element_forw(a->head); ae != a->head; ae = element_forw(ae)) { + sa[i].v = ae; + if (numeric_flag) + sa[i].num = strtod(element_value(ae), NULL); + else + sa[i].value = element_value(ae); + i++; + } + + // sanity check + if ( i != n ) { + builtin_error("%s: corrupt array", var->name); + return EXECUTION_FAILURE; + } + + qsort(sa, n, sizeof(sort_element), compare); + + // for in-place sort, simply "rewire" the array elements + sa[0].v->prev = sa[n-1].v->next = a->head; + a->head->next = sa[0].v; + a->head->prev = sa[n-1].v; + a->max_index = n - 1; + for (i = 0; i < n; i++) { + sa[i].v->ind = i; + if (i > 0) + sa[i].v->prev = sa[i-1].v; + if (i < n - 1) + sa[i].v->next = sa[i+1].v; + } + xfree(sa); + return EXECUTION_SUCCESS; +} + +int +asort_builtin(WORD_LIST *list) { + SHELL_VAR *var, *var2; + char *word; + int opt, ret; + int index_flag = 0; + + numeric_flag = 0; + reverse_flag = 0; + + reset_internal_getopt(); + while ((opt = internal_getopt(list, "inr")) != -1) { + switch (opt) { + case 'i': index_flag = 1; break; + case 'n': numeric_flag = 1; break; + case 'r': reverse_flag = 1; break; + CASE_HELPOPT; + default: + builtin_usage(); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) { + builtin_usage(); + return EX_USAGE; + } + + if (legal_identifier (list->word->word) == 0) { + sh_invalidid (list->word->word); + return EXECUTION_FAILURE; + } + + if ( index_flag ) { + if ( list->next == 0 || list->next->next ) { + builtin_usage(); + return EX_USAGE; + } + if (legal_identifier (list->next->word->word) == 0) { + sh_invalidid (list->next->word->word); + return EXECUTION_FAILURE; + } + var = find_or_make_array_variable(list->word->word, 1); + if (var == 0) + return EXECUTION_FAILURE; + var2 = find_variable(list->next->word->word); + if ( !var2 || ( !array_p(var2) && !assoc_p(var2) ) ) { + builtin_error("%s: Not an array", list->next->word->word); + return EXECUTION_FAILURE; + } + return sort_index(var, var2); + } + + while (list) { + word = list->word->word; + var = find_variable(word); + list = list->next; + + if (var == 0 || array_p(var) == 0) { + builtin_error("%s: Not an array", word); + continue; + } + if (readonly_p(var) || noassign_p(var)) { + if (readonly_p(var)) + err_readonly(word); + continue; + } + + if ( (ret = sort_inplace(var)) != EXECUTION_SUCCESS ) + return ret; + } + return EXECUTION_SUCCESS; + +} + +char *asort_doc[] = { + "Sort arrays in-place.", + "", + "Options:", + " -n compare according to string numerical value", + " -r reverse the result of comparisons", + " -i sort using indices/keys", + "", + "If -i is supplied, SOURCE is not sorted in-place, but the indices (or keys", + "if associative) of SOURCE, after sorting it by its values, are placed as", + "values in the indexed array DEST", + "", + "Associative arrays may not be sorted in-place.", + "", + "Exit status:", + "Return value is zero unless an error happened (like invalid variable name", + "or readonly array).", + (char *)NULL +}; + +struct builtin asort_struct = { + "asort", + asort_builtin, + BUILTIN_ENABLED, + asort_doc, + "asort [-nr] array ... or asort [-nr] -i dest source", + 0 +}; diff --git a/examples/loadables/basename.c b/examples/loadables/basename.c new file mode 100644 index 0000000..29dd1a6 --- /dev/null +++ b/examples/loadables/basename.c @@ -0,0 +1,131 @@ +/* basename - return nondirectory portion of pathname */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> +#include "builtins.h" +#include "shell.h" +#include "common.h" +#include "bashgetopt.h" + +int +basename_builtin (list) + WORD_LIST *list; +{ + int slen, sufflen, off; + char *string, *suffix, *fn; + + if (no_options (list)) + return (EX_USAGE); + list = loptend; + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + string = list->word->word; + suffix = (char *)NULL; + if (list->next) + { + list = list->next; + suffix = list->word->word; + } + + if (list->next) + { + builtin_usage (); + return (EX_USAGE); + } + + slen = strlen (string); + + /* Strip trailing slashes */ + while (slen > 0 && string[slen - 1] == '/') + slen--; + + /* (2) If string consists entirely of slash characters, string shall be + set to a single slash character. In this case, skip steps (3) + through (5). */ + if (slen == 0) + { + fputs ("/\n", stdout); + return (EXECUTION_SUCCESS); + } + + /* (3) If there are any trailing slash characters in string, they + shall be removed. */ + string[slen] = '\0'; + + /* (4) If there are any slash characters remaining in string, the prefix + of string up to an including the last slash character in string + shall be removed. */ + while (--slen >= 0) + if (string[slen] == '/') + break; + + fn = string + slen + 1; + + /* (5) If the suffix operand is present, is not identical to the + characters remaining in string, and is identical to a suffix + of the characters remaining in string, the suffix suffix + shall be removed from string. Otherwise, string shall not be + modified by this step. */ + if (suffix) + { + sufflen = strlen (suffix); + slen = strlen (fn); + if (sufflen < slen) + { + off = slen - sufflen; + if (strcmp (fn + off, suffix) == 0) + fn[off] = '\0'; + } + } + printf ("%s\n", fn); + return (EXECUTION_SUCCESS); +} + +char *basename_doc[] = { + "Return non-directory portion of pathname.", + "", + "The STRING is converted to a filename corresponding to the last", + "pathname component in STRING. If the suffix string SUFFIX is", + "supplied, it is removed.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin basename_struct = { + "basename", /* builtin name */ + basename_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + basename_doc, /* array of long documentation strings. */ + "basename string [suffix]", /* usage synopsis */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/cat.c b/examples/loadables/cat.c new file mode 100644 index 0000000..71685f3 --- /dev/null +++ b/examples/loadables/cat.c @@ -0,0 +1,138 @@ +/* + * cat replacement + * + * no options - the way cat was intended + */ + +/* + Copyright (C) 1999-2009,2022 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <fcntl.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" + +#ifndef errno +extern int errno; +#endif + +extern char *strerror (); +extern char **make_builtin_argv (); + +static int +fcopy(fd, fn) +int fd; +char *fn; +{ + char buf[4096], *s; + int n, w, e; + + while (n = read(fd, buf, sizeof (buf))) { + if (n < 0) { + e = errno; + write(2, "cat: read error: ", 18); + write(2, fn, strlen(fn)); + write(2, ": ", 2); + s = strerror(e); + write(2, s, strlen(s)); + write(2, "\n", 1); + return 1; + } + QUIT; + w = write(1, buf, n); + if (w != n) { + e = errno; + write(2, "cat: write error: ", 18); + s = strerror(e); + write(2, s, strlen(s)); + write(2, "\n", 1); + return 1; + } + QUIT; + } + return 0; +} + +int +cat_main (argc, argv) +int argc; +char **argv; +{ + int i, fd, r; + char *s; + + if (argc == 1) + return (fcopy(0, "standard input")); + + for (i = r = 1; i < argc; i++) { + QUIT; + if (argv[i][0] == '-' && argv[i][1] == '\0') + fd = 0; + else { + fd = open(argv[i], O_RDONLY, 0666); + if (fd < 0) { + s = strerror(errno); + write(2, "cat: cannot open ", 17); + write(2, argv[i], strlen(argv[i])); + write(2, ": ", 2); + write(2, s, strlen(s)); + write(2, "\n", 1); + continue; + } + } + r = fcopy(fd, argv[i]); + if (fd != 0) + close(fd); + } + QUIT; + return (r); +} + +int +cat_builtin(list) +WORD_LIST *list; +{ + char **v; + int c, r; + + v = make_builtin_argv(list, &c); + QUIT; + r = cat_main(c, v); + free(v); + + return r; +} + +char *cat_doc[] = { + "Display files.", + "", + "Read each FILE and display it on the standard output. If any", + "FILE is `-' or if no FILE argument is given, the standard input", + "is read.", + (char *)0 +}; + +struct builtin cat_struct = { + "cat", + cat_builtin, + BUILTIN_ENABLED, + cat_doc, + "cat [-] [file ...]", + 0 +}; diff --git a/examples/loadables/csv.c b/examples/loadables/csv.c new file mode 100644 index 0000000..75b3772 --- /dev/null +++ b/examples/loadables/csv.c @@ -0,0 +1,206 @@ +/* csv - process a line of csv data and populate an indexed array with the + fields */ + +/* + Copyright (C) 2020 Free Software Foundation, Inc. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +/* See Makefile for compilation details. */ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include "bashansi.h" +#include <stdio.h> + +#include "loadables.h" + +#define CSV_ARRAY_DEFAULT "CSV" + +#define NQUOTE 0 +#define DQUOTE 1 + +/* Split LINE into comma-separated fields, storing each field into a separate + element of array variable CSV, starting at index 0. The format of LINE is + as described in RFC 4180. */ +static int +csvsplit (csv, line, dstring) + SHELL_VAR *csv; + char *line, *dstring; +{ + arrayind_t ind; + char *field, *prev, *buf, *xbuf; + int delim, qstate; + int b, rval; + + xbuf = 0; + ind = 0; + field = prev = line; + + do + { + if (*prev == '"') + { + if (xbuf == 0) + xbuf = xmalloc (strlen (prev) + 1); + buf = xbuf; + b = 0; + qstate = DQUOTE; + for (field = ++prev; *field; field++) + { + if (qstate == DQUOTE && *field == '"' && field[1] == '"') + buf[b++] = *field++; /* skip double quote */ + else if (qstate == DQUOTE && *field == '"') + qstate = NQUOTE; + else if (qstate == NQUOTE && *field == *dstring) + break; + else + /* This copies any text between a closing double quote and the + delimiter. If you want to change that, make sure to do the + copy only if qstate == DQUOTE. */ + buf[b++] = *field; + } + buf[b] = '\0'; + } + else + { + buf = prev; + field = prev + strcspn (prev, dstring); + } + + delim = *field; + *field = '\0'; + + bind_array_element (csv, ind, buf, 0); + ind++; + + *field = delim; + + if (delim == *dstring) + prev = field + 1; + } + while (delim == *dstring); + + if (xbuf) + free (xbuf); + + return (rval = ind); /* number of fields */ +} + +int +csv_builtin (list) + WORD_LIST *list; +{ + int opt, rval; + char *array_name, *csvstring; + SHELL_VAR *v; + + array_name = 0; + rval = EXECUTION_SUCCESS; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "a:")) != -1) + { + switch (opt) + { + case 'a': + array_name = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (array_name == 0) + array_name = CSV_ARRAY_DEFAULT; + + if (legal_identifier (array_name) == 0) + { + sh_invalidid (array_name); + return (EXECUTION_FAILURE); + } + + if (list == 0) + { + builtin_error ("csv string argument required"); + return (EX_USAGE); + } + + v = find_or_make_array_variable (array_name, 1); + if (v == 0 || readonly_p (v) || noassign_p (v)) + { + if (v && readonly_p (v)) + err_readonly (array_name); + return (EXECUTION_FAILURE); + } + else if (array_p (v) == 0) + { + builtin_error ("%s: not an indexed array", array_name); + return (EXECUTION_FAILURE); + } + if (invisible_p (v)) + VUNSETATTR (v, att_invisible); + array_flush (array_cell (v)); + + csvstring = list->word->word; + + if (csvstring == 0 || *csvstring == 0) + return (EXECUTION_SUCCESS); + + opt = csvsplit (v, csvstring, ","); + /* Maybe do something with OPT here, it's the number of fields */ + + return (rval); +} + +/* Called when builtin is enabled and loaded from the shared object. If this + function returns 0, the load fails. */ +int +csv_builtin_load (name) + char *name; +{ + return (1); +} + +/* Called when builtin is disabled. */ +void +csv_builtin_unload (name) + char *name; +{ +} + +char *csv_doc[] = { + "Read comma-separated fields from a string.", + "", + "Parse STRING, a line of comma-separated values, into individual fields,", + "and store them into the indexed array ARRAYNAME starting at index 0.", + "If ARRAYNAME is not supplied, \"CSV\" is the default array name.", + (char *)NULL +}; + +struct builtin csv_struct = { + "csv", /* builtin name */ + csv_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + csv_doc, /* array of long documentation strings. */ + "csv [-a ARRAY] string", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/cut.c b/examples/loadables/cut.c new file mode 100644 index 0000000..48f8004 --- /dev/null +++ b/examples/loadables/cut.c @@ -0,0 +1,631 @@ +/* cut,lcut - extract specified fields from a line and assign them to an array + or print them to the standard output */ + +/* + Copyright (C) 2020 Free Software Foundation, Inc. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +/* See Makefile for compilation details. */ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include "bashansi.h" +#include <stdio.h> +#include <fcntl.h> +#include <errno.h> + +#include "loadables.h" +#include "shmbutil.h" + +#define CUT_ARRAY_DEFAULT "CUTFIELDS" + +#define NOPOS -2 /* sentinel for unset startpos/endpos */ + +#define BOL 0 +#define EOL INT_MAX +#define NORANGE -1 /* just a position, no range */ + +#define BFLAG (1 << 0) +#define CFLAG (1 << 1) +#define DFLAG (1 << 2) +#define FFLAG (1 << 3) +#define SFLAG (1 << 4) + +struct cutpos +{ + int startpos, endpos; /* zero-based, correction done in getlist() */ +}; + +struct cutop +{ + int flags; + int delim; + int npos; + struct cutpos *poslist; +}; + +static int +poscmp (a, b) + void *a, *b; +{ + struct cutpos *p1, *p2; + + p1 = (struct cutpos *)a; + p2 = (struct cutpos *)b; + return (p1->startpos - p2->startpos); +} + +static int +getlist (arg, opp) + char *arg; + struct cutpos **opp; +{ + char *ntok, *ltok, *larg; + int s, e; + intmax_t num; + struct cutpos *poslist; + int npos, nsize; + + poslist = 0; + nsize = npos = 0; + s = e = 0; + larg = arg; + while (ltok = strsep (&larg, ",")) + { + if (*ltok == 0) + continue; + + ntok = strsep (<ok, "-"); + if (*ntok == 0) + s = BOL; + else + { + if (legal_number (ntok, &num) == 0 || (int)num != num || num <= 0) + { + builtin_error ("%s: invalid list value", ntok); + *opp = poslist; + return -1; + } + s = num; + s--; /* fields are 1-based */ + } + if (ltok == 0) + e = NORANGE; + else if (*ltok == 0) + e = EOL; + else + { + if (legal_number (ltok, &num) == 0 || (int)num != num || num <= 0) + { + builtin_error ("%s: invalid list value", ltok); + *opp = poslist; + return -1; + } + e = num; + e--; + if (e == s) + e = NORANGE; + } + + if (npos == nsize) + { + nsize += 4; + poslist = (struct cutpos *)xrealloc (poslist, nsize * sizeof (struct cutpos)); + } + poslist[npos].startpos = s; + poslist[npos].endpos = e; + npos++; + } + if (npos == 0) + { + builtin_error ("missing list of positions"); + *opp = poslist; + return -1; + } + + qsort (poslist, npos, sizeof(poslist[0]), poscmp); + *opp = poslist; + + return npos; +} + +static int +cutbytes (v, line, ops) + SHELL_VAR *v; + char *line; + struct cutop *ops; +{ + arrayind_t ind; + char *buf, *bmap; + size_t llen; + int i, b, n, s, e; + + llen = strlen (line); + buf = xmalloc (llen + 1); + bmap = xmalloc (llen + 1); + memset (bmap, 0, llen); + + for (n = 0; n < ops->npos; n++) + { + s = ops->poslist[n].startpos; /* no translation needed yet */ + e = ops->poslist[n].endpos; + if (e == NORANGE) + e = s; + else if (e == EOL || e >= llen) + e = llen - 1; + /* even if a column is specified multiple times, it will only be printed + once */ + for (i = s; i <= e; i++) + bmap[i] = 1; + } + + b = 0; + for (i = 0; i < llen; i++) + if (bmap[i]) + buf[b++] = line[i]; + buf[b] = 0; + + if (v) + { + ind = 0; + bind_array_element (v, ind, buf, 0); + ind++; + } + else + printf ("%s\n", buf); + + free (buf); + free (bmap); + + return ind; +} + +static int +cutchars (v, line, ops) + SHELL_VAR *v; + char *line; + struct cutop *ops; +{ + arrayind_t ind; + char *buf, *bmap; + wchar_t *wbuf, *wb2; + size_t llen, wlen; + int i, b, n, s, e; + + if (MB_CUR_MAX == 1) + return (cutbytes (v, line, ops)); + if (locale_utf8locale && utf8_mbsmbchar (line) == 0) + return (cutbytes (v, line, ops)); + + llen = strlen (line); + wbuf = (wchar_t *)xmalloc ((llen + 1) * sizeof (wchar_t)); + + wlen = mbstowcs (wbuf, line, llen); + if (MB_INVALIDCH (wlen)) + { + free (wbuf); + return (cutbytes (v, line, ops)); + } + + bmap = xmalloc (llen + 1); + memset (bmap, 0, llen); + + for (n = 0; n < ops->npos; n++) + { + s = ops->poslist[n].startpos; /* no translation needed yet */ + e = ops->poslist[n].endpos; + if (e == NORANGE) + e = s; + else if (e == EOL || e >= wlen) + e = wlen - 1; + /* even if a column is specified multiple times, it will only be printed + once */ + for (i = s; i <= e; i++) + bmap[i] = 1; + } + + wb2 = (wchar_t *)xmalloc ((wlen + 1) * sizeof (wchar_t)); + b = 0; + for (i = 0; i < wlen; i++) + if (bmap[i]) + wb2[b++] = wbuf[i]; + wb2[b] = 0; + + free (wbuf); + + buf = bmap; + n = wcstombs (buf, wb2, llen); + + if (v) + { + ind = 0; + bind_array_element (v, ind, buf, 0); + ind++; + } + else + printf ("%s\n", buf); + + free (buf); + free (wb2); + + return ind; +} + +/* The basic strategy is to cut the line into fields using strsep, populate + an array of fields from 0..nf, then select those fields using the same + bitmap approach as cut{bytes,chars} and assign them to the array variable + V or print them on stdout. This function obeys SFLAG. */ +static int +cutfields (v, line, ops) + SHELL_VAR *v; + char *line; + struct cutop *ops; +{ + arrayind_t ind; + char *buf, *bmap, *field, **fields, delim[2]; + size_t llen, fsize; + int i, b, n, s, e, nf; + + ind = 0; + + delim[0] = ops->delim; + delim[1] = '\0'; + + fields = 0; + nf = 0; + fsize = 0; + + field = buf = line; + do + { + field = strsep (&buf, delim); /* destructive */ + if (nf == fsize) + { + fsize += 8; + fields = xrealloc (fields, fsize * sizeof (char *)); + } + fields[nf] = field; + if (field) + nf++; + } + while (field); + + if (nf == 1) + { + free (fields); + if (ops->flags & SFLAG) + return ind; + if (v) + { + bind_array_element (v, ind, line, 0); + ind++; + } + else + printf ("%s\n", line); + return ind; + } + + bmap = xmalloc (nf + 1); + memset (bmap, 0, nf); + + for (n = 0; n < ops->npos; n++) + { + s = ops->poslist[n].startpos; /* no translation needed yet */ + e = ops->poslist[n].endpos; + if (e == NORANGE) + e = s; + else if (e == EOL || e >= nf) + e = nf - 1; + /* even if a column is specified multiple times, it will only be printed + once */ + for (i = s; i <= e; i++) + bmap[i] = 1; + } + + for (i = 1, b = 0; b < nf; b++) + { + if (bmap[b] == 0) + continue; + if (v) + { + bind_array_element (v, ind, fields[b], 0); + ind++; + } + else + { + if (i == 0) + putchar (ops->delim); + printf ("%s", fields[b]); + } + i = 0; + } + if (v == 0) + putchar ('\n'); + + return nf; +} + +static int +cutline (v, line, ops) + SHELL_VAR *v; + char *line; + struct cutop *ops; +{ + int rval; + + if (ops->flags & BFLAG) + rval = cutbytes (v, line, ops); + else if (ops->flags & CFLAG) + rval = cutchars (v, line, ops); + else + rval = cutfields (v, line, ops); + + return (rval >= 0 ? EXECUTION_SUCCESS : EXECUTION_FAILURE); +} + +static int +cutfile (v, list, ops) + SHELL_VAR *v; + WORD_LIST *list; + struct cutop *ops; +{ + int fd, unbuffered_read; + char *line, *b; + size_t llen; + WORD_LIST *l; + ssize_t n; + + line = 0; + llen = 0; + + l = list; + do + { + /* for each file */ + if (l == 0 || (l->word->word[0] == '-' && l->word->word[1] == '\0')) + fd = 0; + else + fd = open (l->word->word, O_RDONLY); + if (fd < 0) + { + file_error (l->word->word); + return (EXECUTION_FAILURE); + } + +#ifndef __CYGWIN__ + unbuffered_read = (lseek (fd, 0L, SEEK_CUR) < 0) && (errno == ESPIPE); +#else + unbuffered_read = 1; +#endif + + while ((n = zgetline (fd, &line, &llen, '\n', unbuffered_read)) != -1) + { + QUIT; + if (line[n] == '\n') + line[n] = '\0'; /* cutline expects no newline terminator */ + cutline (v, line, ops); /* can modify line */ + } + if (fd > 0) + close (fd); + + QUIT; + if (l) + l = l->next; + } + while (l); + + free (line); + return EXECUTION_SUCCESS; +} + +#define OPTSET(x) ((cutflags & (x)) ? 1 : 0) + +static int +cut_internal (which, list) + int which; /* not used yet */ + WORD_LIST *list; +{ + int opt, rval, cutflags, delim, npos; + char *array_name, *cutstring, *list_arg; + SHELL_VAR *v; + struct cutop op; + struct cutpos *poslist; + + v = 0; + rval = EXECUTION_SUCCESS; + + cutflags = 0; + array_name = 0; + list_arg = 0; + delim = '\t'; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "a:b:c:d:f:sn")) != -1) + { + switch (opt) + { + case 'a': + array_name = list_optarg; + break; + case 'b': + cutflags |= BFLAG; + list_arg = list_optarg; + break; + case 'c': + cutflags |= CFLAG; + list_arg = list_optarg; + break; + case 'd': + cutflags |= DFLAG; + delim = list_optarg[0]; + if (delim == 0 || list_optarg[1]) + { + builtin_error ("delimiter must be a single non-null character"); + return (EX_USAGE); + } + break; + case 'f': + cutflags |= FFLAG; + list_arg = list_optarg; + break; + case 'n': + break; + case 's': + cutflags |= SFLAG; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (array_name && (legal_identifier (array_name) == 0)) + { + sh_invalidid (array_name); + return (EXECUTION_FAILURE); + } + + if (list == 0 && which == 0) + { + builtin_error ("string argument required"); + return (EX_USAGE); + } + + /* options are mutually exclusive and one is required */ + if ((OPTSET (BFLAG) + OPTSET (CFLAG) + OPTSET (FFLAG)) != 1) + { + builtin_usage (); + return (EX_USAGE); + } + + if ((npos = getlist (list_arg, &poslist)) < 0) + { + free (poslist); + return (EXECUTION_FAILURE); + } + + if (array_name) + { + v = find_or_make_array_variable (array_name, 1); + if (v == 0 || readonly_p (v) || noassign_p (v)) + { + if (v && readonly_p (v)) + err_readonly (array_name); + return (EXECUTION_FAILURE); + } + else if (array_p (v) == 0) + { + builtin_error ("%s: not an indexed array", array_name); + return (EXECUTION_FAILURE); + } + if (invisible_p (v)) + VUNSETATTR (v, att_invisible); + array_flush (array_cell (v)); + } + + op.flags = cutflags; + op.delim = delim; + op.npos = npos; + op.poslist = poslist; + + /* we implement cut as a builtin with a cutfile() function that opens each + filename in LIST as a filename (or `-' for stdin) and runs cutline on + every line in the file. */ + if (which == 0) + { + cutstring = list->word->word; + if (cutstring == 0 || *cutstring == 0) + { + free (poslist); + return (EXECUTION_SUCCESS); + } + rval = cutline (v, cutstring, &op); + } + else + rval = cutfile (v, list, &op); + + return (rval); +} + +int +lcut_builtin (list) + WORD_LIST *list; +{ + return (cut_internal (0, list)); +} + +int +cut_builtin (list) + WORD_LIST *list; +{ + return (cut_internal (1, list)); +} + +char *lcut_doc[] = { + "Extract selected fields from a string.", + "", + "Select portions of LINE (as specified by LIST) and assign them to", + "elements of the indexed array ARRAY starting at index 0, or write", + "them to the standard output if -a is not specified.", + "", + "Items specified by LIST are either column positions or fields delimited", + "by a special character, and are described more completely in cut(1).", + "", + "Columns correspond to bytes (-b), characters (-c), or fields (-f). The", + "field delimiter is specified by -d (default TAB). Column numbering", + "starts at 1.", + (char *)NULL +}; + +struct builtin lcut_struct = { + "lcut", /* builtin name */ + lcut_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + lcut_doc, /* array of long documentation strings. */ + "lcut [-a ARRAY] [-b LIST] [-c LIST] [-f LIST] [-d CHAR] [-sn] line", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; + +char *cut_doc[] = { + "Extract selected fields from each line of a file.", + "", + "Select portions of each line (as specified by LIST) from each FILE", + "and write them to the standard output. cut reads from the standard", + "input if no FILE arguments are specified or if a FILE argument is a", + "single hyphen.", + "", + "Items specified by LIST are either column positions or fields delimited", + "by a special character, and are described more completely in cut(1).", + "", + "Columns correspond to bytes (-b), characters (-c), or fields (-f). The", + "field delimiter is specified by -d (default TAB). Column numbering", + "starts at 1.", + (char *)NULL +}; + +struct builtin cut_struct = { + "cut", /* builtin name */ + cut_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + cut_doc, /* array of long documentation strings. */ + "cut [-a ARRAY] [-b LIST] [-c LIST] [-f LIST] [-d CHAR] [-sn] [file ...]", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/dirname.c b/examples/loadables/dirname.c new file mode 100644 index 0000000..d802ca7 --- /dev/null +++ b/examples/loadables/dirname.c @@ -0,0 +1,119 @@ +/* dirname - return directory portion of pathname */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> +#include "builtins.h" +#include "shell.h" +#include "common.h" +#include "bashgetopt.h" + +int +dirname_builtin (list) + WORD_LIST *list; +{ + int slen; + char *string; + + if (no_options (list)) + return (EX_USAGE); + list = loptend; + + if (list == 0 || list->next) + { + builtin_usage (); + return (EX_USAGE); + } + + string = list->word->word; + slen = strlen (string); + + /* Strip trailing slashes */ + while (slen > 0 && string[slen - 1] == '/') + slen--; + + /* (2) If string consists entirely of slash characters, string shall be + set to a single slash character. In this case, skip steps (3) + through (8). */ + if (slen == 0) + { + fputs ("/\n", stdout); + return (EXECUTION_SUCCESS); + } + + /* (3) If there are any trailing slash characters in string, they + shall be removed. */ + string[slen] = '\0'; + + /* (4) If there are no slash characters remaining in string, string + shall be set to a single period character. In this case, skip + steps (5) through (8). + + (5) If there are any trailing nonslash characters in string, + they shall be removed. */ + + while (--slen >= 0) + if (string[slen] == '/') + break; + + if (slen < 0) + { + fputs (".\n", stdout); + return (EXECUTION_SUCCESS); + } + + /* (7) If there are any trailing slash characters in string, they + shall be removed. */ + while (--slen >= 0) + if (string[slen] != '/') + break; + string[++slen] = '\0'; + + /* (8) If the remaining string is empty, string shall be set to a single + slash character. */ + printf ("%s\n", (slen == 0) ? "/" : string); + return (EXECUTION_SUCCESS); +} + +char *dirname_doc[] = { + "Display directory portion of pathname.", + "", + "The STRING is converted to the name of the directory containing", + "the filename corresponding to the last pathname component in STRING.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin dirname_struct = { + "dirname", /* builtin name */ + dirname_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + dirname_doc, /* array of long documentation strings. */ + "dirname string", /* usage synopsis */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/dsv.c b/examples/loadables/dsv.c new file mode 100644 index 0000000..70e59cb --- /dev/null +++ b/examples/loadables/dsv.c @@ -0,0 +1,300 @@ +/* dsv - process a line of delimiter-separated data and populate an indexed + array with the fields */ + +/* + Copyright (C) 2022 Free Software Foundation, Inc. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +/* See Makefile for compilation details. */ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include "bashansi.h" +#include <stdio.h> + +#include "loadables.h" + +#define DSV_ARRAY_DEFAULT "DSV" + +#define NQUOTE 0 +#define DQUOTE 1 +#define SQUOTE 2 + +#define F_SHELLQUOTE 0x01 +#define F_GREEDY 0x02 +#define F_PRESERVE 0x04 + +/* Split LINE into delimiter-separated fields, storing each field into a + separate element of array variable DSV, starting at index 0. The format + of LINE is delimiter-separated values. By default, this splits lines of + CSV data as described in RFC 4180. If *DSTRING is any other value than + ',', this uses that character as a field delimiter. Pass F_SHELLQUOTE in + FLAGS to understand shell-like double-quoting and backslash-escaping in + double quotes instead of the "" CSV behavior, and shell-like single quotes. + Pass F_GREEDY in FLAGS to consume multiple leading and trailing instances + of *DSTRING and consecutive instances of *DSTRING in LINE without creating + null fields. If you want to preserve the quote characters in the generated + fields, pass F_PRESERVE; by default, this removes them. */ +static int +dsvsplit (dsv, line, dstring, flags) + SHELL_VAR *dsv; + char *line, *dstring; + int flags; +{ + arrayind_t ind; + char *field, *prev, *buf, *xbuf; + int delim, qstate; + int b, rval; + + xbuf = 0; + ind = 0; + field = prev = line; + + /* If we want a greedy split, consume leading instances of *DSTRING */ + if (flags & F_GREEDY) + { + while (*prev == *dstring) + prev++; + field = prev; + } + + do + { + if (*prev == '"') + { + if (xbuf == 0) + xbuf = xmalloc (strlen (prev) + 1); + buf = xbuf; + b = 0; + if (flags & F_PRESERVE) + buf[b++] = *prev; + qstate = DQUOTE; + for (field = ++prev; *field; field++) + { + if (qstate == DQUOTE && *field == '"' && field[1] == '"' && (flags & F_SHELLQUOTE) == 0) + buf[b++] = *field++; /* skip double quote */ + else if (qstate == DQUOTE && (flags & F_SHELLQUOTE) && *field == '\\' && strchr (slashify_in_quotes, field[1]) != 0) + buf[b++] = *++field; /* backslash quoted double quote */ + else if (qstate == DQUOTE && *field == '"') + { + qstate = NQUOTE; + if (flags & F_PRESERVE) + buf[b++] = *field; + } + else if (qstate == NQUOTE && *field == *dstring) + break; + else + /* This copies any text between a closing double quote and the + delimiter. If you want to change that, make sure to do the + copy only if qstate == DQUOTE. */ + buf[b++] = *field; + } + buf[b] = '\0'; + } + else if ((flags & F_SHELLQUOTE) && *prev == '\'') + { + if (xbuf == 0) + xbuf = xmalloc (strlen (prev) + 1); + buf = xbuf; + b = 0; + if (flags & F_PRESERVE) + buf[b++] = *prev; + qstate = SQUOTE; + for (field = ++prev; *field; field++) + { + if (qstate == SQUOTE && *field == '\'') + { + qstate = NQUOTE; + if (flags & F_PRESERVE) + buf[b++] = *field; + } + else if (qstate == NQUOTE && *field == *dstring) + break; + else + /* This copies any text between a closing single quote and the + delimiter. If you want to change that, make sure to do the + copy only if qstate == SQUOTE. */ + buf[b++] = *field; + } + buf[b] = '\0'; + } + else + { + buf = prev; + field = prev + strcspn (prev, dstring); + } + + delim = *field; + *field = '\0'; + + if ((flags & F_GREEDY) == 0 || buf[0]) + { + bind_array_element (dsv, ind, buf, 0); + ind++; + } + + *field = delim; + + if (delim == *dstring) + prev = field + 1; + } + while (delim == *dstring); + + if (xbuf) + free (xbuf); + + return (rval = ind); /* number of fields */ +} + +int +dsv_builtin (list) + WORD_LIST *list; +{ + int opt, rval, flags; + char *array_name, *dsvstring, *delims; + SHELL_VAR *v; + + array_name = 0; + rval = EXECUTION_SUCCESS; + + delims = ","; + flags = 0; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "a:d:Sgp")) != -1) + { + switch (opt) + { + case 'a': + array_name = list_optarg; + break; + case 'd': + delims = list_optarg; + break; + case 'S': + flags |= F_SHELLQUOTE; + break; + case 'g': + flags |= F_GREEDY; + break; + case 'p': + flags |= F_PRESERVE; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (array_name == 0) + array_name = DSV_ARRAY_DEFAULT; + + if (legal_identifier (array_name) == 0) + { + sh_invalidid (array_name); + return (EXECUTION_FAILURE); + } + + if (list == 0) + { + builtin_error ("dsv string argument required"); + return (EX_USAGE); + } + + v = find_or_make_array_variable (array_name, 1); + if (v == 0 || readonly_p (v) || noassign_p (v)) + { + if (v && readonly_p (v)) + err_readonly (array_name); + return (EXECUTION_FAILURE); + } + else if (array_p (v) == 0) + { + builtin_error ("%s: not an indexed array", array_name); + return (EXECUTION_FAILURE); + } + if (invisible_p (v)) + VUNSETATTR (v, att_invisible); + array_flush (array_cell (v)); + + dsvstring = list->word->word; + + if (dsvstring == 0 || *dsvstring == 0) + return (EXECUTION_SUCCESS); + + opt = dsvsplit (v, dsvstring, delims, flags); + /* Maybe do something with OPT here, it's the number of fields */ + + return (rval); +} + +/* Called when builtin is enabled and loaded from the shared object. If this + function returns 0, the load fails. */ +int +dsv_builtin_load (name) + char *name; +{ + return (1); +} + +/* Called when builtin is disabled. */ +void +dsv_builtin_unload (name) + char *name; +{ +} + +char *dsv_doc[] = { + "Read delimiter-separated fields from STRING.", + "", + "Parse STRING, a line of delimiter-separated values, into individual", + "fields, and store them into the indexed array ARRAYNAME starting at", + "index 0. The parsing understands and skips over double-quoted strings. ", + "If ARRAYNAME is not supplied, \"DSV\" is the default array name.", + "If the delimiter is a comma, the default, this parses comma-", + "separated values as specified in RFC 4180.", + "", + "The -d option specifies the delimiter. The delimiter is the first", + "character of the DELIMS argument. Specifying a DELIMS argument that", + "contains more than one character is not supported and will produce", + "unexpected results. The -S option enables shell-like quoting: double-", + "quoted strings can contain backslashes preceding special characters,", + "and the backslash will be removed; and single-quoted strings are", + "processed as the shell would process them. The -g option enables a", + "greedy split: sequences of the delimiter are skipped at the beginning", + "and end of STRING, and consecutive instances of the delimiter in STRING", + "do not generate empty fields. If the -p option is supplied, dsv leaves", + "quote characters as part of the generated field; otherwise they are", + "removed.", + "", + "The return value is 0 unless an invalid option is supplied or the ARRAYNAME", + "argument is invalid or readonly.", + (char *)NULL +}; + +struct builtin dsv_struct = { + "dsv", /* builtin name */ + dsv_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + dsv_doc, /* array of long documentation strings. */ + "dsv [-a ARRAYNAME] [-d DELIMS] [-Sgp] string", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/fdflags.c b/examples/loadables/fdflags.c new file mode 100644 index 0000000..9f2d089 --- /dev/null +++ b/examples/loadables/fdflags.c @@ -0,0 +1,374 @@ +/* Loadable builtin to get and set file descriptor flags. */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 2017-2022 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include <fcntl.h> +#include <errno.h> +#include "bashansi.h" +#include <stdio.h> + +#include "loadables.h" + +#ifndef FD_CLOEXEC +# define FD_CLOEXEC 1 +#endif + +static const struct +{ + const char *name; + int value; +} file_flags[] = +{ +#ifdef O_APPEND + { "append", O_APPEND }, +#else +# define O_APPEND 0 +#endif +#ifdef O_ASYNC + { "async", O_ASYNC }, +#else +# define O_ASYNC 0 +#endif +#ifdef O_SYNC + { "sync", O_SYNC }, +#else +# define O_SYNC 0 +#endif +#ifdef O_NONBLOCK + { "nonblock", O_NONBLOCK }, +#else +# define O_NONBLOCK 0 +#endif +#ifdef O_FSYNC + { "fsync", O_FSYNC }, +#else +# define O_FSYNC 0 +#endif +#ifdef O_DSYNC + { "dsync", O_DSYNC }, +#else +# define O_DSYNC 0 +#endif +#ifdef O_RSYNC + { "rsync", O_RSYNC }, +#else +# define O_RSYNC 0 +#endif +#ifdef O_ALT_IO + { "altio", O_ALT_IO }, +#else +# define O_ALT_IO 0 +#endif +#ifdef O_DIRECT + { "direct", O_DIRECT }, +#else +# define O_DIRECT 0 +#endif +#ifdef O_NOATIME + { "noatime", O_NOATIME }, +#else +# define O_NOATIME 0 +#endif +#ifdef O_NOSIGPIPE + { "nosigpipe", O_NOSIGPIPE }, +#else +# define O_NOSIGPIPE 0 +#endif + +#ifndef O_CLOEXEC +# define ALLFLAGS (O_APPEND|O_ASYNC|O_SYNC|O_NONBLOCK|O_FSYNC|O_DSYNC|\ + O_RSYNC|O_ALT_IO|O_DIRECT|O_NOATIME|O_NOSIGPIPE) + +/* An unused bit in the file status flags word we can use to pass around the + state of close-on-exec. */ +# define O_CLOEXEC ((~ALLFLAGS) ^ ((~ALLFLAGS) & ((~ALLFLAGS) - 1))) +#endif + +#ifdef O_CLOEXEC + { "cloexec", O_CLOEXEC }, +#endif +}; + +#define N_FLAGS (sizeof (file_flags) / sizeof (file_flags[0])) + +#ifndef errno +extern int errno; +#endif + +/* FIX THIS */ +static int +getallflags () +{ + int i, allflags; + + for (i = allflags = 0; i < N_FLAGS; i++) + allflags |= file_flags[i].value; + return allflags; +} + +static int +getflags(int fd, int p) +{ + int c, f; + int allflags; + + if ((c = fcntl(fd, F_GETFD)) == -1) + { + if (p) + builtin_error("can't get status for fd %d: %s", fd, strerror(errno)); + return -1; + } + + if ((f = fcntl(fd, F_GETFL)) == -1) + { + if (p) + builtin_error("Can't get flags for fd %d: %s", fd, strerror(errno)); + return -1; + } + + if (c) + f |= O_CLOEXEC; + + return f & getallflags(); +} + +static void +printone(int fd, int p, int verbose) +{ + int f; + size_t i; + + if ((f = getflags(fd, p)) == -1) + return; + + printf ("%d:", fd); + + for (i = 0; i < N_FLAGS; i++) + { + if (f & file_flags[i].value) + { + printf ("%s%s", verbose ? "+" : "", file_flags[i].name); + f &= ~file_flags[i].value; + } + else if (verbose) + printf ( "-%s", file_flags[i].name); + else + continue; + + if (f || (verbose && i != N_FLAGS - 1)) + putchar (','); + } + printf ("\n"); +} + +static int +parseflags(char *s, int *p, int *n) +{ + int f, *v; + size_t i; + + f = 0; + *p = *n = 0; + + for (s = strtok(s, ","); s; s = strtok(NULL, ",")) + { + switch (*s) + { + case '+': + v = p; + s++; + break; + case '-': + v = n; + s++; + break; + default: + v = &f; + break; + } + + for (i = 0; i < N_FLAGS; i++) + if (strcmp(s, file_flags[i].name) == 0) + { + *v |= file_flags[i].value; + break; + } + if (i == N_FLAGS) + builtin_error("invalid flag `%s'", s); + } + + return f; +} + +static void +setone(int fd, char *v, int verbose) +{ + int f, n, pos, neg, cloexec; + + f = getflags(fd, 1); + if (f == -1) + return; + + parseflags(v, &pos, &neg); + + cloexec = -1; + + if ((pos & O_CLOEXEC) && (f & O_CLOEXEC) == 0) + cloexec = FD_CLOEXEC; + if ((neg & O_CLOEXEC) && (f & O_CLOEXEC)) + cloexec = 0; + + if (cloexec != -1 && fcntl(fd, F_SETFD, cloexec) == -1) + builtin_error("can't set status for fd %d: %s", fd, strerror(errno)); + + pos &= ~O_CLOEXEC; + neg &= ~O_CLOEXEC; + f &= ~O_CLOEXEC; + + n = f; + n |= pos; + n &= ~neg; + + if (n != f && fcntl(fd, F_SETFL, n) == -1) + builtin_error("can't set flags for fd %d: %s", fd, strerror(errno)); +} + +static int +getmaxfd () +{ + int maxfd, ignore; + +#ifdef F_MAXFD + maxfd = fcntl (0, F_MAXFD); + if (maxfd > 0) + return maxfd; +#endif + + maxfd = getdtablesize (); + if (maxfd <= 0) + maxfd = HIGH_FD_MAX; + for (maxfd--; maxfd > 0; maxfd--) + if (fcntl (maxfd, F_GETFD, &ignore) != -1) + break; + + return maxfd; +} + +int +fdflags_builtin (WORD_LIST *list) +{ + int opt, maxfd, i, num, verbose, setflag; + char *setspec; + WORD_LIST *l; + intmax_t inum; + + setflag = verbose = 0; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "s:v")) != -1) + { + switch (opt) + { + case 's': + setflag = 1; + setspec = list_optarg; + break; + case 'v': + verbose = 1; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + + } + list = loptend; + + /* Maybe we could provide some default here, but we don't yet. */ + if (list == 0 && setflag) + return (EXECUTION_SUCCESS); + + if (list == 0) + { + maxfd = getmaxfd (); + if (maxfd < 0) + { + builtin_error ("can't get max fd: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + for (i = 0; i < maxfd; i++) + printone (i, 0, verbose); + return (EXECUTION_SUCCESS); + } + + opt = EXECUTION_SUCCESS; + for (l = list; l; l = l->next) + { + if (legal_number (l->word->word, &inum) == 0 || inum < 0) + { + builtin_error ("%s: invalid file descriptor", l->word->word); + opt = EXECUTION_FAILURE; + continue; + } + num = inum; /* truncate to int */ + if (setflag) + setone (num, setspec, verbose); + else + printone (num, 1, verbose); + } + + return (opt); +} + +char *fdflags_doc[] = +{ + "Display and modify file descriptor flags.", + "", + "Display or, if the -s option is supplied, set flags for each file", + "descriptor supplied as an argument. If the -v option is supplied,", + "the display is verbose, including each settable option name in the", + "form of a string such as that accepted by the -s option.", + "", + "The -s option accepts a string with a list of flag names, each preceded", + "by a `+' (set) or `-' (unset). Those changes are applied to each file", + "descriptor supplied as an argument.", + "", + "If no file descriptor arguments are supplied, the displayed information", + "consists of the status of flags for each of the shell's open files.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. The flags must include BUILTIN_ENABLED so the + builtin can be used. */ +struct builtin fdflags_struct = { + "fdflags", /* builtin name */ + fdflags_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + fdflags_doc, /* array of long documentation strings. */ + "fdflags [-v] [-s flags_string] [fd ...]", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/finfo.c b/examples/loadables/finfo.c new file mode 100644 index 0000000..8c278c3 --- /dev/null +++ b/examples/loadables/finfo.c @@ -0,0 +1,629 @@ +/* + * finfo - print file info + * + * Chet Ramey + * chet@po.cwru.edu + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <sys/types.h> +#ifdef MAJOR_IN_MKDEV +# include <sys/mkdev.h> +#endif +#ifdef MAJOR_IN_SYSMACROS +# include <sys/sysmacros.h> +#endif +#include "posixstat.h" +#include <stdio.h> +#include <pwd.h> +#include <grp.h> +#include <errno.h> +#include "posixtime.h" + +#include "bashansi.h" +#include "shell.h" +#include "builtins.h" +#include "common.h" +#include "getopt.h" + +#ifndef errno +extern int errno; +#endif + +extern char **make_builtin_argv (); + +static void perms(); +static int printst(); +static int printsome(); +static void printmode(); +static int printfinfo(); +static int finfo_main(); + +extern int sh_optind; +extern char *sh_optarg; +extern char *this_command_name; + +static char *prog; +static int pmask; + +#define OPT_UID 0x00001 +#define OPT_GID 0x00002 +#define OPT_DEV 0x00004 +#define OPT_INO 0x00008 +#define OPT_PERM 0x00010 +#define OPT_LNKNAM 0x00020 +#define OPT_FID 0x00040 +#define OPT_NLINK 0x00080 +#define OPT_RDEV 0x00100 +#define OPT_SIZE 0x00200 +#define OPT_ATIME 0x00400 +#define OPT_MTIME 0x00800 +#define OPT_CTIME 0x01000 +#define OPT_BLKSIZE 0x02000 +#define OPT_BLKS 0x04000 +#define OPT_FTYPE 0x08000 +#define OPT_PMASK 0x10000 +#define OPT_OPERM 0x20000 + +#define OPT_ASCII 0x1000000 + +#define OPTIONS "acdgiflmnopsuACGMP:U" + +static int +octal(s) +char *s; +{ + int r; + + r = *s - '0'; + while (*++s >= '0' && *s <= '7') + r = (r * 8) + (*s - '0'); + return r; +} + +static int +finfo_main(argc, argv) +int argc; +char **argv; +{ + register int i; + int mode, flags, opt; + + sh_optind = 0; /* XXX */ + prog = base_pathname(argv[0]); + if (argc == 1) { + builtin_usage(); + return(1); + } + flags = 0; + while ((opt = sh_getopt(argc, argv, OPTIONS)) != EOF) { + switch(opt) { + case 'a': flags |= OPT_ATIME; break; + case 'A': flags |= OPT_ATIME|OPT_ASCII; break; + case 'c': flags |= OPT_CTIME; break; + case 'C': flags |= OPT_CTIME|OPT_ASCII; break; + case 'd': flags |= OPT_DEV; break; + case 'i': flags |= OPT_INO; break; + case 'f': flags |= OPT_FID; break; + case 'g': flags |= OPT_GID; break; + case 'G': flags |= OPT_GID|OPT_ASCII; break; + case 'l': flags |= OPT_LNKNAM; break; + case 'm': flags |= OPT_MTIME; break; + case 'M': flags |= OPT_MTIME|OPT_ASCII; break; + case 'n': flags |= OPT_NLINK; break; + case 'o': flags |= OPT_OPERM; break; + case 'p': flags |= OPT_PERM; break; + case 'P': flags |= OPT_PMASK; pmask = octal(sh_optarg); break; + case 's': flags |= OPT_SIZE; break; + case 'u': flags |= OPT_UID; break; + case 'U': flags |= OPT_UID|OPT_ASCII; break; + default: builtin_usage (); return(1); + } + } + + argc -= sh_optind; + argv += sh_optind; + + if (argc == 0) { + builtin_usage(); + return(1); + } + + for (i = 0; i < argc; i++) + opt = flags ? printsome (argv[i], flags) : printfinfo(argv[i]); + + return(opt); +} + +static struct stat * +getstat(f) +char *f; +{ + static struct stat st; + int fd, r; + intmax_t lfd; + + if (strncmp(f, "/dev/fd/", 8) == 0) { + if ((legal_number(f + 8, &lfd) == 0) || (int)lfd != lfd) { + builtin_error("%s: invalid fd", f + 8); + return ((struct stat *)0); + } + fd = lfd; + r = fstat(fd, &st); + } else +#ifdef HAVE_LSTAT + r = lstat(f, &st); +#else + r = stat(f, &st); +#endif + if (r < 0) { + builtin_error("%s: cannot stat: %s", f, strerror(errno)); + return ((struct stat *)0); + } + return (&st); +} + +static int +printfinfo(f) +char *f; +{ + struct stat *st; + + st = getstat(f); + return (st ? printst(st) : 1); +} + +static int +getperm(m) +int m; +{ + return (m & (S_IRWXU|S_IRWXG|S_IRWXO|S_ISUID|S_ISGID)); +} + +static void +perms(m) +int m; +{ + char ubits[4], gbits[4], obits[4]; /* u=rwx,g=rwx,o=rwx */ + int i; + + i = 0; + if (m & S_IRUSR) + ubits[i++] = 'r'; + if (m & S_IWUSR) + ubits[i++] = 'w'; + if (m & S_IXUSR) + ubits[i++] = 'x'; + ubits[i] = '\0'; + + i = 0; + if (m & S_IRGRP) + gbits[i++] = 'r'; + if (m & S_IWGRP) + gbits[i++] = 'w'; + if (m & S_IXGRP) + gbits[i++] = 'x'; + gbits[i] = '\0'; + + i = 0; + if (m & S_IROTH) + obits[i++] = 'r'; + if (m & S_IWOTH) + obits[i++] = 'w'; + if (m & S_IXOTH) + obits[i++] = 'x'; + obits[i] = '\0'; + + if (m & S_ISUID) + ubits[2] = (m & S_IXUSR) ? 's' : 'S'; + if (m & S_ISGID) + gbits[2] = (m & S_IXGRP) ? 's' : 'S'; + if (m & S_ISVTX) + obits[2] = (m & S_IXOTH) ? 't' : 'T'; + + printf ("u=%s,g=%s,o=%s", ubits, gbits, obits); +} + +static void +printmode(mode) +int mode; +{ + if (S_ISBLK(mode)) + printf("S_IFBLK "); + if (S_ISCHR(mode)) + printf("S_IFCHR "); + if (S_ISDIR(mode)) + printf("S_IFDIR "); + if (S_ISREG(mode)) + printf("S_IFREG "); + if (S_ISFIFO(mode)) + printf("S_IFIFO "); + if (S_ISLNK(mode)) + printf("S_IFLNK "); + if (S_ISSOCK(mode)) + printf("S_IFSOCK "); +#ifdef S_ISWHT + if (S_ISWHT(mode)) + printf("S_ISWHT "); +#endif + perms(getperm(mode)); + printf("\n"); +} + +static int +printst(st) +struct stat *st; +{ + struct passwd *pw; + struct group *gr; + char *owner; + int ma, mi, d; + + ma = major (st->st_rdev); + mi = minor (st->st_rdev); +#if defined (makedev) + d = makedev (ma, mi); +#else + d = st->st_rdev & 0xFF; +#endif + printf("Device (major/minor): %d (%d/%d)\n", d, ma, mi); + + printf("Inode: %d\n", (int) st->st_ino); + printf("Mode: (%o) ", (int) st->st_mode); + printmode((int) st->st_mode); + printf("Link count: %d\n", (int) st->st_nlink); + pw = getpwuid(st->st_uid); + owner = pw ? pw->pw_name : "unknown"; + printf("Uid of owner: %d (%s)\n", (int) st->st_uid, owner); + gr = getgrgid(st->st_gid); + owner = gr ? gr->gr_name : "unknown"; + printf("Gid of owner: %d (%s)\n", (int) st->st_gid, owner); + printf("Device type: %d\n", (int) st->st_rdev); + printf("File size: %ld\n", (long) st->st_size); + printf("File last access time: %s", ctime (&st->st_atime)); + printf("File last modify time: %s", ctime (&st->st_mtime)); + printf("File last status change time: %s", ctime (&st->st_ctime)); + fflush(stdout); + return(0); +} + +static int +printsome(f, flags) +char *f; +int flags; +{ + struct stat *st; + struct passwd *pw; + struct group *gr; + int p; + char *b; + + st = getstat(f); + if (st == NULL) + return (1); + + /* Print requested info */ + if (flags & OPT_ATIME) { + if (flags & OPT_ASCII) + printf("%s", ctime(&st->st_atime)); + else + printf("%ld\n", st->st_atime); + } else if (flags & OPT_MTIME) { + if (flags & OPT_ASCII) + printf("%s", ctime(&st->st_mtime)); + else + printf("%ld\n", st->st_mtime); + } else if (flags & OPT_CTIME) { + if (flags & OPT_ASCII) + printf("%s", ctime(&st->st_ctime)); + else + printf("%ld\n", st->st_ctime); + } else if (flags & OPT_DEV) + printf("%lu\n", (unsigned long)st->st_dev); + else if (flags & OPT_INO) + printf("%lu\n", (unsigned long)st->st_ino); + else if (flags & OPT_FID) + printf("%lu:%lu\n", (unsigned long)st->st_dev, (unsigned long)st->st_ino); + else if (flags & OPT_NLINK) + printf("%lu\n", (unsigned long)st->st_nlink); + else if (flags & OPT_LNKNAM) { +#ifdef S_ISLNK + b = xmalloc(4096); + p = readlink(f, b, 4096); + if (p >= 0 && p < 4096) + b[p] = '\0'; + else { + p = errno; + strcpy(b, prog); + strcat(b, ": "); + strcat(b, strerror(p)); + } + printf("%s\n", b); + free(b); +#else + printf("%s\n", f); +#endif + } else if (flags & OPT_PERM) { + perms(st->st_mode); + printf("\n"); + } else if (flags & OPT_OPERM) + printf("%o\n", getperm(st->st_mode)); + else if (flags & OPT_PMASK) + printf("%o\n", getperm(st->st_mode) & pmask); + else if (flags & OPT_UID) { + pw = getpwuid(st->st_uid); + if (flags & OPT_ASCII) + printf("%s\n", pw ? pw->pw_name : "unknown"); + else + printf("%d\n", st->st_uid); + } else if (flags & OPT_GID) { + gr = getgrgid(st->st_gid); + if (flags & OPT_ASCII) + printf("%s\n", gr ? gr->gr_name : "unknown"); + else + printf("%d\n", st->st_gid); + } else if (flags & OPT_SIZE) + printf("%ld\n", (long) st->st_size); + + return (0); +} + +#ifndef NOBUILTIN +int +finfo_builtin(list) + WORD_LIST *list; +{ + int c, r; + char **v; + WORD_LIST *l; + + v = make_builtin_argv (list, &c); + r = finfo_main (c, v); + free (v); + + return r; +} + +static char *finfo_doc[] = { + "Display information about file attributes.", + "", + "Display information about each FILE. Only single operators should", + "be supplied. If no options are supplied, a summary of the info", + "available about each FILE is printed. If FILE is of the form", + "/dev/fd/XX, file descriptor XX is described. Operators, if supplied,", + "have the following meanings:", + "", + " -a last file access time", + " -A last file access time in ctime format", + " -c last file status change time", + " -C last file status change time in ctime format", + " -m last file modification time", + " -M last file modification time in ctime format", + " -d device", + " -i inode", + " -f composite file identifier (device:inode)", + " -g gid of owner", + " -G group name of owner", + " -l name of file pointed to by symlink", + " -n link count", + " -o permissions in octal", + " -p permissions in ascii", + " -P mask permissions ANDed with MASK (like with umask)", + " -s file size in bytes", + " -u uid of owner", + " -U user name of owner", + (char *)0 +}; + +struct builtin finfo_struct = { + "finfo", + finfo_builtin, + BUILTIN_ENABLED, + finfo_doc, + "finfo [-acdgiflmnopsuACGMPU] file [file...]", + 0 +}; +#endif + +#ifdef NOBUILTIN +#if defined (PREFER_STDARG) +# include <stdarg.h> +#else +# if defined (PREFER_VARARGS) +# include <varargs.h> +# endif +#endif + +char *this_command_name; + +main(argc, argv) +int argc; +char **argv; +{ + this_command_name = argv[0]; + exit(finfo_main(argc, argv)); +} + +void +builtin_usage() +{ + fprintf(stderr, "%s: usage: %s [-%s] [file ...]\n", prog, prog, OPTIONS); +} + +#ifndef HAVE_STRERROR +char * +strerror(e) +int e; +{ + static char ebuf[40]; + extern int sys_nerr; + extern char *sys_errlist[]; + + if (e < 0 || e > sys_nerr) { + sprintf(ebuf,"Unknown error code %d", e); + return (&ebuf[0]); + } + return (sys_errlist[e]); +} +#endif + +char * +xmalloc(s) +size_t s; +{ + char *ret; + extern char *malloc(); + + ret = malloc(s); + if (ret) + return (ret); + fprintf(stderr, "%s: cannot malloc %d bytes\n", prog, s); + exit(1); +} + +char * +base_pathname(p) +char *p; +{ + char *t; + + if (t = strrchr(p, '/')) + return(++t); + return(p); +} + +int +legal_number (string, result) + char *string; + long *result; +{ + int sign; + long value; + + sign = 1; + value = 0; + + if (result) + *result = 0; + + /* Skip leading whitespace characters. */ + while (whitespace (*string)) + string++; + + if (!*string) + return (0); + + /* We allow leading `-' or `+'. */ + if (*string == '-' || *string == '+') + { + if (!digit (string[1])) + return (0); + + if (*string == '-') + sign = -1; + + string++; + } + + while (digit (*string)) + { + if (result) + value = (value * 10) + digit_value (*string); + string++; + } + + /* Skip trailing whitespace, if any. */ + while (whitespace (*string)) + string++; + + /* Error if not at end of string. */ + if (*string) + return (0); + + if (result) + *result = value * sign; + + return (1); +} + +int sh_optind; +char *sh_optarg; +int sh_opterr; + +extern int optind; +extern char *optarg; + +int +sh_getopt(c, v, o) +int c; +char **v, *o; +{ + int r; + + r = getopt(c, v, o); + sh_optind = optind; + sh_optarg = optarg; + return r; +} + +#if defined (USE_VARARGS) +void +#if defined (PREFER_STDARG) +builtin_error (const char *format, ...) +#else +builtin_error (format, va_alist) + const char *format; + va_dcl +#endif +{ + va_list args; + + if (this_command_name && *this_command_name) + fprintf (stderr, "%s: ", this_command_name); + +#if defined (PREFER_STDARG) + va_start (args, format); +#else + va_start (args); +#endif + + vfprintf (stderr, format, args); + va_end (args); + fprintf (stderr, "\n"); +} +#else +void +builtin_error (format, arg1, arg2, arg3, arg4, arg5) + char *format, *arg1, *arg2, *arg3, *arg4, *arg5; +{ + if (this_command_name && *this_command_name) + fprintf (stderr, "%s: ", this_command_name); + + fprintf (stderr, format, arg1, arg2, arg3, arg4, arg5); + fprintf (stderr, "\n"); + fflush (stderr); +} +#endif /* !USE_VARARGS */ + +#endif diff --git a/examples/loadables/getconf.c b/examples/loadables/getconf.c new file mode 100644 index 0000000..75a0a56 --- /dev/null +++ b/examples/loadables/getconf.c @@ -0,0 +1,1163 @@ +/* Copyright (C) 1991-2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see <https://www.gnu.org/licenses/>. */ + +/* Modified by Chet Ramey <chet.ramey@case.edu> for inclusion in bash. */ + +#include <config.h> + +#include <unistd.h> +#include <errno.h> +#include <error.h> +#include <libintl.h> +#include <locale.h> +#include <string.h> +#include <stdlib.h> +#include <stdio.h> + +#include "typemax.h" +#include "loadables.h" +#include "getconf.h" + +#ifndef errno +extern int errno; +#endif + +/* Hack to `encode' values wider than long into a conf_variable */ +#define VAL_LLONG_MIN -1000 +#define VAL_LLONG_MAX -1001 +#define VAL_ULLONG_MAX -1002 +#define VAL_ULONG_MAX -1003 +#define VAL_SSIZE_MAX -1004 +#define VAL_SIZE_MAX -1005 + +struct conf + { + const char *name; + const long call_name; /* or value for CONSTANT */ + const enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT, UNDEFINED } call; + }; + +static const struct conf vars[] = + { +#ifdef _PC_LINK_MAX + { "LINK_MAX", _PC_LINK_MAX, PATHCONF }, + { "_POSIX_LINK_MAX", _PC_LINK_MAX, PATHCONF }, +#else + { "LINK_MAX", _POSIX_LINK_MAX, CONSTANT }, + { "_POSIX_LINK_MAX", _POSIX_LINK_MAX, CONSTANT }, +#endif +#ifdef _PC_MAX_CANON + { "MAX_CANON", _PC_MAX_CANON, PATHCONF }, + { "_POSIX_MAX_CANON", _PC_MAX_CANON, PATHCONF }, +#else + { "MAX_CANON", _POSIX_MAX_CANON, CONSTANT }, + { "_POSIX_MAX_CANON", _POSIX_MAX_CANON, CONSTANT }, +#endif +#ifdef _PC_MAX_INPUT + { "MAX_INPUT", _PC_MAX_INPUT, PATHCONF }, + { "_POSIX_MAX_INPUT", _PC_MAX_INPUT, PATHCONF }, +#else + { "MAX_INPUT", _POSIX_MAX_INPUT, CONSTANT }, + { "_POSIX_MAX_INPUT", _POSIX_MAX_INPUT, CONSTANT }, +#endif +#ifdef _PC_NAME_MAX + { "NAME_MAX", _PC_NAME_MAX, PATHCONF }, + { "_POSIX_NAME_MAX", _PC_NAME_MAX, PATHCONF }, +#else + { "NAME_MAX", _POSIX_NAME_MAX, CONSTANT }, + { "_POSIX_NAME_MAX", _POSIX_NAME_MAX, CONSTANT }, +#endif +#ifdef _PC_PATH_MAX + { "PATH_MAX", _PC_PATH_MAX, PATHCONF }, + { "_POSIX_PATH_MAX", _PC_PATH_MAX, PATHCONF }, +#else + { "PATH_MAX", _POSIX_PATH_MAX, CONSTANT }, + { "_POSIX_PATH_MAX", _POSIX_PATH_MAX, CONSTANT }, +#endif +#ifdef _PC_PIPE_BUF + { "PIPE_BUF", _PC_PIPE_BUF, PATHCONF }, + { "_POSIX_PIPE_BUF", _PC_PIPE_BUF, PATHCONF }, +#else + { "PIPE_BUF", _POSIX_PIPE_BUF, CONSTANT }, + { "_POSIX_PIPE_BUF", _POSIX_PIPE_BUF, CONSTANT }, +#endif +#ifdef _PC_SOCK_MAXBUF + { "SOCK_MAXBUF", _PC_SOCK_MAXBUF, PATHCONF }, +#endif +#ifdef _PC_ASYNC_IO + { "_POSIX_ASYNC_IO", _PC_ASYNC_IO, PATHCONF }, +#endif + { "_POSIX_CHOWN_RESTRICTED", _PC_CHOWN_RESTRICTED, PATHCONF }, + { "_POSIX_NO_TRUNC", _PC_NO_TRUNC, PATHCONF }, +#ifdef _PC_PRIO_IO + { "_POSIX_PRIO_IO", _PC_PRIO_IO, PATHCONF }, +#endif +#ifdef _PC_SYNC_IO + { "_POSIX_SYNC_IO", _PC_SYNC_IO, PATHCONF }, +#endif + { "_POSIX_VDISABLE", _PC_VDISABLE, PATHCONF }, + + { "ARG_MAX", _SC_ARG_MAX, SYSCONF }, + { "ATEXIT_MAX", _SC_ATEXIT_MAX, SYSCONF }, +#ifdef _SC_CHAR_BIT + { "CHAR_BIT", _SC_CHAR_BIT, SYSCONF }, +#else + { "CHAR_BIT", CHAR_BIT, CONSTANT }, +#endif +#ifdef _SC_CHAR_MAX + { "CHAR_MAX", _SC_CHAR_MAX, SYSCONF }, +#else + { "CHAR_BIT", CHAR_MAX, CONSTANT }, +#endif +#ifdef _SC_CHAR_MIN + { "CHAR_MIN", _SC_CHAR_MIN, SYSCONF }, +#else + { "CHAR_MIN", CHAR_MIN, CONSTANT }, +#endif + { "CHILD_MAX", _SC_CHILD_MAX, SYSCONF }, + { "CLK_TCK", _SC_CLK_TCK, SYSCONF }, +#ifdef _SC_INT_BIT + { "INT_BIT", _SC_INT_BIT, SYSCONF }, +#else + { "INT_BIT", INT_BIT, CONSTANT }, +#endif +#ifdef _SC_INT_MAX + { "INT_MAX", _SC_INT_MAX, SYSCONF }, +#else + { "INT_MAX", INT_MAX, CONSTANT }, +#endif +#ifdef _SC_INT_MIN + { "INT_MIN", _SC_INT_MIN, SYSCONF }, +#else + { "INT_MIN", INT_MIN, CONSTANT }, +#endif +#ifdef _SC_UIO_MAXIOV + { "IOV_MAX", _SC_UIO_MAXIOV, SYSCONF }, +#endif + { "LOGNAME_MAX", _SC_LOGIN_NAME_MAX, SYSCONF }, +#ifdef _SC_LONG_BIT + { "LONG_BIT", _SC_LONG_BIT, SYSCONF }, +#else + { "LONG_BIT", LONG_BIT, CONSTANT }, +#endif + { "LONG_MIN", LONG_MIN, CONSTANT }, + { "LONG_MAX", LONG_MAX, CONSTANT }, +#if HAVE_LONG_LONG_INT + { "LLONG_MIN", VAL_LLONG_MIN, CONSTANT }, + { "LLONG_MAX", VAL_LLONG_MAX, CONSTANT }, +#else + { "LLONG_MIN", LLONG_MIN, CONSTANT }, + { "LLONG_MAX", LLONG_MAX, CONSTANT }, +#endif +#ifdef _SC_MB_LEN_MAX + { "MB_LEN_MAX", _SC_MB_LEN_MAX, SYSCONF }, +#else + { "MB_LEN_MAX", MB_LEN_MAX, CONSTANT }, +#endif + { "NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF }, +#ifdef _SC_NL_ARGMAX + { "NL_ARGMAX", _SC_NL_ARGMAX, SYSCONF }, +#endif +#ifdef _SC_NL_LANGMAX + { "NL_LANGMAX", _SC_NL_LANGMAX, SYSCONF }, +#endif +#ifdef _SC_NL_MSGMAX + { "NL_MSGMAX", _SC_NL_MSGMAX, SYSCONF }, +#endif +#ifdef _SC_NL_NMAX + { "NL_NMAX", _SC_NL_NMAX, SYSCONF }, +#endif +#ifdef _SC_NL_SETMAX + { "NL_SETMAX", _SC_NL_SETMAX, SYSCONF }, +#endif +#ifdef _SC_NL_TEXTMAX + { "NL_TEXTMAX", _SC_NL_TEXTMAX, SYSCONF }, +#endif + { "NSS_BUFLEN_GROUP", _SC_GETGR_R_SIZE_MAX, SYSCONF }, + { "NSS_BUFLEN_PASSWD", _SC_GETPW_R_SIZE_MAX, SYSCONF }, +#ifdef _SC_NZERO + { "NZERO", _SC_NZERO, SYSCONF }, +#endif + { "OPEN_MAX", _SC_OPEN_MAX, SYSCONF }, + { "PAGESIZE", _SC_PAGESIZE, SYSCONF }, + { "PAGE_SIZE", _SC_PAGESIZE, SYSCONF }, +#ifdef _SC_PASS_MAX + { "PASS_MAX", _SC_PASS_MAX, SYSCONF }, +#endif + { "PTHREAD_DESTRUCTOR_ITERATIONS", _SC_THREAD_DESTRUCTOR_ITERATIONS, SYSCONF }, + { "PTHREAD_KEYS_MAX", _SC_THREAD_KEYS_MAX, SYSCONF }, + { "PTHREAD_STACK_MIN", _SC_THREAD_STACK_MIN, SYSCONF }, + { "PTHREAD_THREADS_MAX", _SC_THREAD_THREADS_MAX, SYSCONF }, +#ifdef _SC_SCHAR_MAX + { "SCHAR_MAX", _SC_SCHAR_MAX, SYSCONF }, +#else + { "SCHAR_MAX", SCHAR_MAX, CONSTANT }, +#endif +#ifdef _SC_SCHAR_MIN + { "SCHAR_MIN", _SC_SCHAR_MIN, SYSCONF }, +#else + { "SCHAR_MIN", SCHAR_MIN, CONSTANT }, +#endif +#ifdef _SC_SHRT_MAX + { "SHRT_MAX", _SC_SHRT_MAX, SYSCONF }, +#else + { "SHRT_MAX", SHRT_MAX, CONSTANT }, +#endif +#ifdef _SC_SHRT_MIN + { "SHRT_MIN", _SC_SHRT_MIN, SYSCONF }, +#else + { "SHRT_MIN", SHRT_MIN, CONSTANT }, +#endif +#ifdef _SC_SIZE_MAX + { "SIZE_MAX", _SC_SIZE_MAX, SYSCONF }, +#else + { "SIZE_MAX", VAL_SIZE_MAX, CONSTANT }, +#endif +#ifdef _SC_SSIZE_MAX + { "SSIZE_MAX", _SC_SSIZE_MAX, SYSCONF }, +#elif SIZEOF_SIZE_MAX == 8 + { "SSIZE_MAX", VAL_SSIZE_MAX, CONSTANT }, +#else + { "SSIZE_MAX", VAL_SSIZE_MAX, CONSTANT }, +#endif + { "TTY_NAME_MAX", _SC_TTY_NAME_MAX, SYSCONF }, + { "TZNAME_MAX", _SC_TZNAME_MAX, SYSCONF }, +#ifdef _SC_UCHAR_MAX + { "UCHAR_MAX", _SC_UCHAR_MAX, SYSCONF }, +#else + { "UCHAR_MAX", UCHAR_MAX, CONSTANT }, +#endif +#ifdef _SC_UINT_MAX + { "UINT_MAX", _SC_UINT_MAX, SYSCONF }, +#else + { "UINT_MAX", UINT_MAX, CONSTANT }, +#endif +#ifdef _SC_UIO_MAXIOV + { "UIO_MAXIOV", _SC_UIO_MAXIOV, SYSCONF }, +#endif +#ifdef _SC_ULONG_MAX + { "ULONG_MAX", _SC_ULONG_MAX, SYSCONF }, +#else + { "ULONG_MAX", VAL_ULONG_MAX, CONSTANT }, +#endif +#ifdef HAVE_LONG_LONG_INT + { "ULLONG_MAX", VAL_ULLONG_MAX, CONSTANT }, +#endif +#ifdef _SC_USHRT_MAX + { "USHRT_MAX", _SC_USHRT_MAX, SYSCONF }, +#else + { "USHRT_MAX", USHRT_MAX, CONSTANT }, +#endif +#ifdef _SC_WORD_BIT + { "WORD_BIT", _SC_WORD_BIT, SYSCONF }, +#else + { "WORD_BIT", WORD_BIT, CONSTANT }, +#endif +#ifdef _SC_AVPHYS_PAGES + { "_AVPHYS_PAGES", _SC_AVPHYS_PAGES, SYSCONF }, +#endif + { "_NPROCESSORS_CONF", _SC_NPROCESSORS_CONF, SYSCONF }, + { "_NPROCESSORS_ONLN", _SC_NPROCESSORS_ONLN, SYSCONF }, + { "_PHYS_PAGES", _SC_PHYS_PAGES, SYSCONF }, +#ifdef _SC_ARG_MAX + { "_POSIX_ARG_MAX", _SC_ARG_MAX, SYSCONF }, +#else + { "_POSIX_ARG_MAX", _POSIX_ARG_MAX, CONSTANT }, +#endif + { "_POSIX_ASYNCHRONOUS_IO", _SC_ASYNCHRONOUS_IO, SYSCONF }, +#ifdef _SC_CHILD_MAX + { "_POSIX_CHILD_MAX", _SC_CHILD_MAX, SYSCONF }, +#else + { "_POSIX_CHILD_MAX", _POSIX_CHILD_MAX, CONSTANT }, +#endif + { "_POSIX_FSYNC", _SC_FSYNC, SYSCONF }, + { "_POSIX_JOB_CONTROL", _SC_JOB_CONTROL, SYSCONF }, + { "_POSIX_MAPPED_FILES", _SC_MAPPED_FILES, SYSCONF }, + { "_POSIX_MEMLOCK", _SC_MEMLOCK, SYSCONF }, + { "_POSIX_MEMLOCK_RANGE", _SC_MEMLOCK_RANGE, SYSCONF }, + { "_POSIX_MEMORY_PROTECTION", _SC_MEMORY_PROTECTION, SYSCONF }, + { "_POSIX_MESSAGE_PASSING", _SC_MESSAGE_PASSING, SYSCONF }, + { "_POSIX_NGROUPS_MAX", _SC_NGROUPS_MAX, SYSCONF }, + { "_POSIX_OPEN_MAX", _SC_OPEN_MAX, SYSCONF }, +#ifdef _SC_PII + { "_POSIX_PII", _SC_PII, SYSCONF }, +#endif +#ifdef _SC_PII_INTERNET + { "_POSIX_PII_INTERNET", _SC_PII_INTERNET, SYSCONF }, +#endif +#ifdef _SC_PII_INTERNET_DGRAM + { "_POSIX_PII_INTERNET_DGRAM", _SC_PII_INTERNET_DGRAM, SYSCONF }, +#endif +#ifdef _SC_PII_INTERNET_STREAM + { "_POSIX_PII_INTERNET_STREAM", _SC_PII_INTERNET_STREAM, SYSCONF }, +#endif +#ifdef _SC_PII_OSI + { "_POSIX_PII_OSI", _SC_PII_OSI, SYSCONF }, +#endif +#ifdef _SC_PII_OSI_CLTS + { "_POSIX_PII_OSI_CLTS", _SC_PII_OSI_CLTS, SYSCONF }, +#endif +#ifdef _SC_PII_OSI_COTS + { "_POSIX_PII_OSI_COTS", _SC_PII_OSI_COTS, SYSCONF }, +#endif +#ifdef _SC_PII_OSI_M + { "_POSIX_PII_OSI_M", _SC_PII_OSI_M, SYSCONF }, +#endif +#ifdef _SC_PII_SOCKET + { "_POSIX_PII_SOCKET", _SC_PII_SOCKET, SYSCONF }, +#endif +#ifdef _SC_PII_XTI + { "_POSIX_PII_XTI", _SC_PII_XTI, SYSCONF }, +#endif +#ifdef _SC_POLL + { "_POSIX_POLL", _SC_POLL, SYSCONF }, +#endif +#ifdef _SC_PRIORITIZED_IO + { "_POSIX_PRIORITIZED_IO", _SC_PRIORITIZED_IO, SYSCONF }, +#endif + { "_POSIX_PRIORITY_SCHEDULING", _SC_PRIORITY_SCHEDULING, SYSCONF }, + { "_POSIX_REALTIME_SIGNALS", _SC_REALTIME_SIGNALS, SYSCONF }, + { "_POSIX_SAVED_IDS", _SC_SAVED_IDS, SYSCONF }, +#ifdef _SC_SELECT + { "_POSIX_SELECT", _SC_SELECT, SYSCONF }, +#endif + { "_POSIX_SEMAPHORES", _SC_SEMAPHORES, SYSCONF }, + { "_POSIX_SHARED_MEMORY_OBJECTS", _SC_SHARED_MEMORY_OBJECTS, SYSCONF }, +#ifdef _SC_SSIZE_MAX + { "_POSIX_SSIZE_MAX", _SC_SSIZE_MAX, SYSCONF }, +#elif SIZEOF_SIZE_T == 8 + { "_POSIX_SSIZE_MAX", VAL_SSIZE_MAX, CONSTANT }, +#else + { "_POSIX_SSIZE_MAX", VAL_SSIZE_MAX, CONSTANT }, +#endif +#ifdef _SC_STREAM_MAX + { "_POSIX_STREAM_MAX", _SC_STREAM_MAX, SYSCONF }, +#else + { "_POSIX_STREAM_MAX", _POSIX_STREAM_MAX, CONSTANT }, +#endif + { "_POSIX_SYNCHRONIZED_IO", _SC_SYNCHRONIZED_IO, SYSCONF }, + { "_POSIX_THREADS", _SC_THREADS, SYSCONF }, + { "_POSIX_THREAD_ATTR_STACKADDR", _SC_THREAD_ATTR_STACKADDR, SYSCONF }, + { "_POSIX_THREAD_ATTR_STACKSIZE", _SC_THREAD_ATTR_STACKSIZE, SYSCONF }, + { "_POSIX_THREAD_PRIORITY_SCHEDULING", _SC_THREAD_PRIORITY_SCHEDULING, SYSCONF }, + { "_POSIX_THREAD_PRIO_INHERIT", _SC_THREAD_PRIO_INHERIT, SYSCONF }, + { "_POSIX_THREAD_PRIO_PROTECT", _SC_THREAD_PRIO_PROTECT, SYSCONF }, +#ifdef _SC_THREAD_ROBUST_PRIO_INHERIT + { "_POSIX_THREAD_ROBUST_PRIO_INHERIT", _SC_THREAD_ROBUST_PRIO_INHERIT, + SYSCONF }, +#endif +#ifdef _SC_THREAD_ROBUST_PRIO_PROTECT + { "_POSIX_THREAD_ROBUST_PRIO_PROTECT", _SC_THREAD_ROBUST_PRIO_PROTECT, + SYSCONF }, +#endif + { "_POSIX_THREAD_PROCESS_SHARED", _SC_THREAD_PROCESS_SHARED, SYSCONF }, + { "_POSIX_THREAD_SAFE_FUNCTIONS", _SC_THREAD_SAFE_FUNCTIONS, SYSCONF }, + { "_POSIX_TIMERS", _SC_TIMERS, SYSCONF }, + { "TIMER_MAX", _SC_TIMER_MAX, SYSCONF }, +#ifdef _POSIX_TZNAME_MAX + { "_POSIX_TZNAME_MAX", _SC_TZNAME_MAX, SYSCONF }, +#else + { "_POSIX_TZNAME_MAX", _POSIX_TZNAME_MAX, CONSTANT }, +#endif + { "_POSIX_VERSION", _SC_VERSION, SYSCONF }, +#ifdef _SC_T_IOV_MAX + { "_T_IOV_MAX", _SC_T_IOV_MAX, SYSCONF }, +#endif +#ifdef _SC_XOPEN_CRYPT + { "_XOPEN_CRYPT", _SC_XOPEN_CRYPT, SYSCONF }, +#endif +#ifdef _SC_XOPEN_ENH_I18N + { "_XOPEN_ENH_I18N", _SC_XOPEN_ENH_I18N, SYSCONF }, +#endif +#ifdef _SC_XOPEN_LEGACY + { "_XOPEN_LEGACY", _SC_XOPEN_LEGACY, SYSCONF }, +#endif +#ifdef _SC_XOPEN_REALTIME + { "_XOPEN_REALTIME", _SC_XOPEN_REALTIME, SYSCONF }, +#endif +#ifdef _SC_XOPEN_REALTIME_THREADS + { "_XOPEN_REALTIME_THREADS", _SC_XOPEN_REALTIME_THREADS, SYSCONF }, +#endif +#ifdef _SC_XOPEN_SHM + { "_XOPEN_SHM", _SC_XOPEN_SHM, SYSCONF }, +#endif +#ifdef _SC_XOPEN_UNIX + { "_XOPEN_UNIX", _SC_XOPEN_UNIX, SYSCONF }, +#endif +#ifdef _SC_XOPEN_VERSION + { "_XOPEN_VERSION", _SC_XOPEN_VERSION, SYSCONF }, +#endif +#ifdef _SC_XOPEN_XCU_VERSION + { "_XOPEN_XCU_VERSION", _SC_XOPEN_XCU_VERSION, SYSCONF }, +#endif +#ifdef _SC_XOPEN_XPG2 + { "_XOPEN_XPG2", _SC_XOPEN_XPG2, SYSCONF }, +#endif +#ifdef _SC_XOPEN_XPG3 + { "_XOPEN_XPG3", _SC_XOPEN_XPG3, SYSCONF }, +#endif +#ifdef _SC_XOPEN_XPG4 + { "_XOPEN_XPG4", _SC_XOPEN_XPG4, SYSCONF }, +#endif + /* POSIX.2 */ +#ifdef _SC_BC_BASE_MAX + { "BC_BASE_MAX", _SC_BC_BASE_MAX, SYSCONF }, + { "POSIX2_BC_BASE_MAX", _SC_BC_BASE_MAX, SYSCONF }, +#else + { "BC_BASE_MAX", _POSIX2_BC_BASE_MAX, CONSTANT }, +#endif +#ifdef _SC_BC_BASE_MAX + { "BC_DIM_MAX", _SC_BC_DIM_MAX, SYSCONF }, + { "POSIX2_BC_DIM_MAX", _SC_BC_DIM_MAX, SYSCONF }, +#else + { "BC_DIM_MAX", _POSIX2_BC_DIM_MAX, CONSTANT }, +#endif +#ifdef _SC_BC_SCALE_MAX + { "BC_SCALE_MAX", _SC_BC_SCALE_MAX, SYSCONF }, + { "POSIX2_BC_SCALE_MAX", _SC_BC_SCALE_MAX, SYSCONF }, +#else + { "BC_SCALE_MAX", _POSIX2_BC_SCALE_MAX, CONSTANT }, +#endif +#ifdef _SC_BC_STRING_MAX + { "BC_STRING_MAX", _SC_BC_STRING_MAX, SYSCONF }, + { "POSIX2_BC_STRING_MAX", _SC_BC_STRING_MAX, SYSCONF }, +#else + { "BC_STRING_MAX", _POSIX2_BC_STRING_MAX, CONSTANT }, + { "POSIX2_BC_STRING_MAX", _POSIX2_BC_STRING_MAX, CONSTANT }, +#endif +#ifdef _SC_CHARCLASS_NAME_MAX + { "CHARCLASS_NAME_MAX", _SC_CHARCLASS_NAME_MAX, SYSCONF }, +#endif +#ifdef _SC_COLL_WEIGHTS_MAX + { "COLL_WEIGHTS_MAX", _SC_COLL_WEIGHTS_MAX, SYSCONF }, + { "POSIX2_COLL_WEIGHTS_MAX", _SC_COLL_WEIGHTS_MAX, SYSCONF }, +#else + { "COLL_WEIGHTS_MAX", _POSIX2_COLL_WEIGHTS_MAX, CONSTANT }, + { "POSIX2_COLL_WEIGHTS_MAX", _POSIX2_COLL_WEIGHTS_MAX, CONSTANT }, +#endif +#ifdef _SC_EQUIV_CLASS_MAX + { "EQUIV_CLASS_MAX", _SC_EQUIV_CLASS_MAX, SYSCONF }, +#else + { "EQUIV_CLASS_MAX", _POSIX2_EQUIV_CLASS_MAX, CONSTANT }, +#endif +#ifdef _SC_EXPR_NEST_MAX + { "EXPR_NEST_MAX", _SC_EXPR_NEST_MAX, SYSCONF }, + { "POSIX2_EXPR_NEST_MAX", _SC_EXPR_NEST_MAX, SYSCONF }, +#else + { "EXPR_NEST_MAX", _POSIX2_EXPR_NEST_MAX, CONSTANT }, + { "POSIX2_EXPR_NEST_MAX", _POSIX2_EXPR_NEST_MAX, CONSTANT }, +#endif +#ifdef _SC_LINE_MAX + { "LINE_MAX", _SC_LINE_MAX, SYSCONF }, + { "_POSIX2_LINE_MAX", _SC_LINE_MAX, SYSCONF }, + { "POSIX2_LINE_MAX", _SC_LINE_MAX, SYSCONF }, +#else + { "LINE_MAX", _POSIX2_LINE_MAX, CONSTANT }, + { "_POSIX2_LINE_MAX", _POSIX2_LINE_MAX, CONSTANT }, + { "POSIX2_LINE_MAX", _POSIX2_LINE_MAX, CONSTANT }, +#endif +#ifdef _SC_RE_DUP_MAX + { "POSIX2_RE_DUP_MAX", _SC_RE_DUP_MAX, SYSCONF }, + { "RE_DUP_MAX", _SC_RE_DUP_MAX, SYSCONF }, +#else + { "POSIX2_RE_DUP_MAX", _POSIX2_RE_DUP_MAX, CONSTANT }, + { "RE_DUP_MAX", _POSIX2_RE_DUP_MAX, CONSTANT }, +#endif + { "POSIX2_CHAR_TERM", _SC_2_CHAR_TERM, SYSCONF }, + { "POSIX2_C_BIND", _SC_2_C_BIND, SYSCONF }, + { "POSIX2_C_DEV", _SC_2_C_DEV, SYSCONF }, +#ifdef _SC_2_C_VERSION + { "POSIX2_C_VERSION", _SC_2_C_VERSION, SYSCONF }, +#endif + { "POSIX2_FORT_DEV", _SC_2_FORT_DEV, SYSCONF }, + { "POSIX2_FORT_RUN", _SC_2_FORT_RUN, SYSCONF }, + { "POSIX2_LOCALEDEF", _SC_2_LOCALEDEF, SYSCONF }, + { "POSIX2_SW_DEV", _SC_2_SW_DEV, SYSCONF }, + { "POSIX2_UPE", _SC_2_UPE, SYSCONF }, + { "POSIX2_VERSION", _SC_2_VERSION, SYSCONF }, + + { "PATH", _CS_PATH, CONFSTR }, + { "CS_PATH", _CS_PATH, CONFSTR }, + + /* LFS */ +#ifdef _CS_LFS_CFLAGS + { "LFS_CFLAGS", _CS_LFS_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_LFS_LDFLAGS + { "LFS_LDFLAGS", _CS_LFS_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_LFS_LIBS + { "LFS_LIBS", _CS_LFS_LIBS, CONFSTR }, +#endif +#ifdef _CS_LFS_LINTFLAGS + { "LFS_LINTFLAGS", _CS_LFS_LINTFLAGS, CONFSTR }, +#endif +#ifdef _CS_LFS64_CFLAGS + { "LFS64_CFLAGS", _CS_LFS64_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_LFS64_LDFLAGS + { "LFS64_LDFLAGS", _CS_LFS64_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_LFS64_LIBS + { "LFS64_LIBS", _CS_LFS64_LIBS, CONFSTR }, +#endif + +#ifdef _CS_LFS64_LINTFLAGS + { "LFS64_LINTFLAGS", _CS_LFS64_LINTFLAGS, CONFSTR }, +#endif + + /* Programming environments. */ +#ifdef _CS_V5_WIDTH_RESTRICTED_ENVS + { "_XBS5_WIDTH_RESTRICTED_ENVS", _CS_V5_WIDTH_RESTRICTED_ENVS, CONFSTR }, + { "XBS5_WIDTH_RESTRICTED_ENVS", _CS_V5_WIDTH_RESTRICTED_ENVS, CONFSTR }, +#endif + +#ifdef _SC_XBS5_ILP32_OFF32 + { "_XBS5_ILP32_OFF32", _SC_XBS5_ILP32_OFF32, SYSCONF }, +#endif +#ifdef _CS_XBS5_ILP32_OFF32_CFLAGS + { "XBS5_ILP32_OFF32_CFLAGS", _CS_XBS5_ILP32_OFF32_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_ILP32_OFF32_LDFLAGS + { "XBS5_ILP32_OFF32_LDFLAGS", _CS_XBS5_ILP32_OFF32_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_ILP32_OFF32_LIBS + { "XBS5_ILP32_OFF32_LIBS", _CS_XBS5_ILP32_OFF32_LIBS, CONFSTR }, +#endif +#ifdef _CS_XBS5_ILP32_OFF32_LINTFLAGS + { "XBS5_ILP32_OFF32_LINTFLAGS", _CS_XBS5_ILP32_OFF32_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_XBS5_ILP32_OFFBIG + { "_XBS5_ILP32_OFFBIG", _SC_XBS5_ILP32_OFFBIG, SYSCONF }, +#endif +#ifdef _CS_XBS5_ILP32_OFFBIG_CFLAGS + { "XBS5_ILP32_OFFBIG_CFLAGS", _CS_XBS5_ILP32_OFFBIG_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_ILP32_OFFBIG_LDFLAGS + { "XBS5_ILP32_OFFBIG_LDFLAGS", _CS_XBS5_ILP32_OFFBIG_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_ILP32_OFFBIG_LIBS + { "XBS5_ILP32_OFFBIG_LIBS", _CS_XBS5_ILP32_OFFBIG_LIBS, CONFSTR }, +#endif +#ifdef _CS_XBS5_ILP32_OFFBIG_LINTFLAGS + { "XBS5_ILP32_OFFBIG_LINTFLAGS", _CS_XBS5_ILP32_OFFBIG_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_XBS5_LP64_OFF64 + { "_XBS5_LP64_OFF64", _SC_XBS5_LP64_OFF64, SYSCONF }, +#endif +#ifdef _CS_XBS5_LP64_OFF64_CFLAGS + { "XBS5_LP64_OFF64_CFLAGS", _CS_XBS5_LP64_OFF64_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_LP64_OFF64_LDFLAGS + { "XBS5_LP64_OFF64_LDFLAGS", _CS_XBS5_LP64_OFF64_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_LP64_OFF64_LIBS + { "XBS5_LP64_OFF64_LIBS", _CS_XBS5_LP64_OFF64_LIBS, CONFSTR }, +#endif +#ifdef _CS_XBS5_LP64_OFF64_LINTFLAGS + { "XBS5_LP64_OFF64_LINTFLAGS", _CS_XBS5_LP64_OFF64_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_XBS5_LPBIG_OFFBIG + { "_XBS5_LPBIG_OFFBIG", _SC_XBS5_LPBIG_OFFBIG, SYSCONF }, +#endif +#ifdef _CS_XBS5_LPBIG_OFFBIG_CFLAGS + { "XBS5_LPBIG_OFFBIG_CFLAGS", _CS_XBS5_LPBIG_OFFBIG_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_LPBIG_OFFBIG_LDFLAGS + { "XBS5_LPBIG_OFFBIG_LDFLAGS", _CS_XBS5_LPBIG_OFFBIG_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_XBS5_LPBIG_OFFBIG_LIBS + { "XBS5_LPBIG_OFFBIG_LIBS", _CS_XBS5_LPBIG_OFFBIG_LIBS, CONFSTR }, +#endif +#ifdef _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS + { "XBS5_LPBIG_OFFBIG_LINTFLAGS", _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_V6_ILP32_OFF32 + { "_POSIX_V6_ILP32_OFF32", _SC_V6_ILP32_OFF32, SYSCONF }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_CFLAGS + { "POSIX_V6_ILP32_OFF32_CFLAGS", _CS_POSIX_V6_ILP32_OFF32_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_LDFLAGS + { "POSIX_V6_ILP32_OFF32_LDFLAGS", _CS_POSIX_V6_ILP32_OFF32_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_LIBS + { "POSIX_V6_ILP32_OFF32_LIBS", _CS_POSIX_V6_ILP32_OFF32_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS + { "POSIX_V6_ILP32_OFF32_LINTFLAGS", _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _CS_V6_WIDTH_RESTRICTED_ENVS + { "_POSIX_V6_WIDTH_RESTRICTED_ENVS", _CS_V6_WIDTH_RESTRICTED_ENVS, CONFSTR }, + { "POSIX_V6_WIDTH_RESTRICTED_ENVS", _CS_V6_WIDTH_RESTRICTED_ENVS, CONFSTR }, +#endif + +#ifdef _SC_V6_ILP32_OFFBIG + { "_POSIX_V6_ILP32_OFFBIG", _SC_V6_ILP32_OFFBIG, SYSCONF }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS + { "POSIX_V6_ILP32_OFFBIG_CFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_LDFLAGS + { "POSIX_V6_ILP32_OFFBIG_LDFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_LIBS + { "POSIX_V6_ILP32_OFFBIG_LIBS", _CS_POSIX_V6_ILP32_OFFBIG_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_ILP32_OFF32_LINTFLAGS + { "POSIX_V6_ILP32_OFFBIG_LINTFLAGS", _CS_POSIX_V6_ILP32_OFFBIG_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_V6_LP64_OFF64 + { "_POSIX_V6_LP64_OFF64", _SC_V6_LP64_OFF64, SYSCONF }, +#endif +#ifdef _CS_POSIX_V6_LP64_OFF64_CFLAGS + { "POSIX_V6_LP64_OFF64_CFLAGS", _CS_POSIX_V6_LP64_OFF64_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_LP64_OFF64_LDFLAGS + { "POSIX_V6_LP64_OFF64_LDFLAGS", _CS_POSIX_V6_LP64_OFF64_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_LP64_OFF64_LIBS + { "POSIX_V6_LP64_OFF64_LIBS", _CS_POSIX_V6_LP64_OFF64_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_LP64_OFF64_LINTFLAGS + { "POSIX_V6_LP64_OFF64_LINTFLAGS", _CS_POSIX_V6_LP64_OFF64_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_V6_LPBIG_OFFBIG + { "_POSIX_V6_LPBIG_OFFBIG", _SC_V6_LPBIG_OFFBIG, SYSCONF }, +#endif +#ifdef _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS + { "POSIX_V6_LPBIG_OFFBIG_CFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS + { "POSIX_V6_LPBIG_OFFBIG_LDFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_LPBIG_OFFBIG_LIBS + { "POSIX_V6_LPBIG_OFFBIG_LIBS", _CS_POSIX_V6_LPBIG_OFFBIG_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS + { "POSIX_V6_LPBIG_OFFBIG_LINTFLAGS", _CS_POSIX_V6_LPBIG_OFFBIG_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_V7_ILP32_OFF32 + { "_POSIX_V7_ILP32_OFF32", _SC_V7_ILP32_OFF32, SYSCONF }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFF32_CFLAGS + { "POSIX_V7_ILP32_OFF32_CFLAGS", _CS_POSIX_V7_ILP32_OFF32_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFF32_LDFLAGS + { "POSIX_V7_ILP32_OFF32_LDFLAGS", _CS_POSIX_V7_ILP32_OFF32_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFF32_LIBS + { "POSIX_V7_ILP32_OFF32_LIBS", _CS_POSIX_V7_ILP32_OFF32_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFF32_LINTFLAGS + { "POSIX_V7_ILP32_OFF32_LINTFLAGS", _CS_POSIX_V7_ILP32_OFF32_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _CS_V7_WIDTH_RESTRICTED_ENVS + { "_POSIX_V7_WIDTH_RESTRICTED_ENVS", _CS_V7_WIDTH_RESTRICTED_ENVS, CONFSTR }, + { "POSIX_V7_WIDTH_RESTRICTED_ENVS", _CS_V7_WIDTH_RESTRICTED_ENVS, CONFSTR }, +#endif + +#ifdef _SC_V7_ILP32_OFFBIG + { "_POSIX_V7_ILP32_OFFBIG", _SC_V7_ILP32_OFFBIG, SYSCONF }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS + { "POSIX_V7_ILP32_OFFBIG_CFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS + { "POSIX_V7_ILP32_OFFBIG_LDFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFFBIG_LIBS + { "POSIX_V7_ILP32_OFFBIG_LIBS", _CS_POSIX_V7_ILP32_OFFBIG_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_ILP32_OFFBIG_LINTFLAGS + { "POSIX_V7_ILP32_OFFBIG_LINTFLAGS", _CS_POSIX_V7_ILP32_OFFBIG_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_V7_LP64_OFF64 + { "_POSIX_V7_LP64_OFF64", _SC_V7_LP64_OFF64, SYSCONF }, +#endif +#ifdef _CS_POSIX_V7_LP64_OFF64_CFLAGS + { "POSIX_V7_LP64_OFF64_CFLAGS", _CS_POSIX_V7_LP64_OFF64_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_LP64_OFF64_LDFLAGS + { "POSIX_V7_LP64_OFF64_LDFLAGS", _CS_POSIX_V7_LP64_OFF64_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_LP64_OFF64_LIBS + { "POSIX_V7_LP64_OFF64_LIBS", _CS_POSIX_V7_LP64_OFF64_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_LP64_OFF64_LINTFLAGS + { "POSIX_V7_LP64_OFF64_LINTFLAGS", _CS_POSIX_V7_LP64_OFF64_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_V7_LPBIG_OFFBIG + { "_POSIX_V7_LPBIG_OFFBIG", _SC_V7_LPBIG_OFFBIG, SYSCONF }, +#endif +#ifdef _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS + { "POSIX_V7_LPBIG_OFFBIG_CFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_CFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS + { "POSIX_V7_LPBIG_OFFBIG_LDFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_LDFLAGS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_LPBIG_OFFBIG_LIBS + { "POSIX_V7_LPBIG_OFFBIG_LIBS", _CS_POSIX_V7_LPBIG_OFFBIG_LIBS, CONFSTR }, +#endif +#ifdef _CS_POSIX_V7_LPBIG_OFFBIG_LINTFLAGS + { "POSIX_V7_LPBIG_OFFBIG_LINTFLAGS", _CS_POSIX_V7_LPBIG_OFFBIG_LINTFLAGS, CONFSTR }, +#endif + +#ifdef _SC_ADVISORY_INFO + { "_POSIX_ADVISORY_INFO", _SC_ADVISORY_INFO, SYSCONF }, +#endif +#ifdef _SC_BARRIERS + { "_POSIX_BARRIERS", _SC_BARRIERS, SYSCONF }, +#endif +#ifdef _SC_BASE + { "_POSIX_BASE", _SC_BASE, SYSCONF }, +#endif +#ifdef _SC_C_LANG_SUPPORT + { "_POSIX_C_LANG_SUPPORT", _SC_C_LANG_SUPPORT, SYSCONF }, +#endif +#ifdef _SC_C_LANG_SUPPORT_R + { "_POSIX_C_LANG_SUPPORT_R", _SC_C_LANG_SUPPORT_R, SYSCONF }, +#endif + { "_POSIX_CLOCK_SELECTION", _SC_CLOCK_SELECTION, SYSCONF }, + { "_POSIX_CPUTIME", _SC_CPUTIME, SYSCONF }, + { "_POSIX_THREAD_CPUTIME", _SC_THREAD_CPUTIME, SYSCONF }, +#ifdef _SC_DEVICE_SPECIFIC + { "_POSIX_DEVICE_SPECIFIC", _SC_DEVICE_SPECIFIC, SYSCONF }, +#endif +#ifdef _SC_DEVICE_SPECIFIC_R + { "_POSIX_DEVICE_SPECIFIC_R", _SC_DEVICE_SPECIFIC_R, SYSCONF }, +#endif +#ifdef _SC_FD_MGMT + { "_POSIX_FD_MGMT", _SC_FD_MGMT, SYSCONF }, +#endif +#ifdef _SC_FIFO + { "_POSIX_FIFO", _SC_FIFO, SYSCONF }, +#endif +#ifdef _SC_PIPE + { "_POSIX_PIPE", _SC_PIPE, SYSCONF }, +#endif +#ifdef _SC_FILE_ATTRIBUTES + { "_POSIX_FILE_ATTRIBUTES", _SC_FILE_ATTRIBUTES, SYSCONF }, +#endif +#ifdef _SC_FILE_LOCKING + { "_POSIX_FILE_LOCKING", _SC_FILE_LOCKING, SYSCONF }, +#endif +#ifdef _SC_FILE_SYSTEM + { "_POSIX_FILE_SYSTEM", _SC_FILE_SYSTEM, SYSCONF }, +#endif + { "_POSIX_MONOTONIC_CLOCK", _SC_MONOTONIC_CLOCK, SYSCONF }, +#ifdef _SC_MULTI_PROCESS + { "_POSIX_MULTI_PROCESS", _SC_MULTI_PROCESS, SYSCONF }, +#endif +#ifdef _SC_SINGLE_PROCESS + { "_POSIX_SINGLE_PROCESS", _SC_SINGLE_PROCESS, SYSCONF }, +#endif +#ifdef _SC_NETWORKING + { "_POSIX_NETWORKING", _SC_NETWORKING, SYSCONF }, +#endif + { "_POSIX_READER_WRITER_LOCKS", _SC_READER_WRITER_LOCKS, SYSCONF }, + { "_POSIX_SPIN_LOCKS", _SC_SPIN_LOCKS, SYSCONF }, + { "_POSIX_REGEXP", _SC_REGEXP, SYSCONF }, +#ifdef _SC_REGEX_VERSION + { "_REGEX_VERSION", _SC_REGEX_VERSION, SYSCONF }, +#endif + { "_POSIX_SHELL", _SC_SHELL, SYSCONF }, +#ifdef _SC_SIGNALS + { "_POSIX_SIGNALS", _SC_SIGNALS, SYSCONF }, +#endif + { "_POSIX_SPAWN", _SC_SPAWN, SYSCONF }, +#ifdef _SC_SPORADIC_SERVER + { "_POSIX_SPORADIC_SERVER", _SC_SPORADIC_SERVER, SYSCONF }, +#endif +#ifdef _SC_THREAD_SPORADIC_SERVER + { "_POSIX_THREAD_SPORADIC_SERVER", _SC_THREAD_SPORADIC_SERVER, SYSCONF }, +#endif +#ifdef _SC_SYSTEM_DATABASE + { "_POSIX_SYSTEM_DATABASE", _SC_SYSTEM_DATABASE, SYSCONF }, +#endif +#ifdef _SC_SYSTEM_DATABASE_R + { "_POSIX_SYSTEM_DATABASE_R", _SC_SYSTEM_DATABASE_R, SYSCONF }, +#endif +#ifdef _SC_TIMEOUTS + { "_POSIX_TIMEOUTS", _SC_TIMEOUTS, SYSCONF }, +#endif +#ifdef _SC_TYPED_MEMORY_OBJECTS + { "_POSIX_TYPED_MEMORY_OBJECTS", _SC_TYPED_MEMORY_OBJECTS, SYSCONF }, +#endif +#ifdef _SC_USER_GROUPS + { "_POSIX_USER_GROUPS", _SC_USER_GROUPS, SYSCONF }, +#endif +#ifdef _SC_USER_GROUPS_R + { "_POSIX_USER_GROUPS_R", _SC_USER_GROUPS_R, SYSCONF }, +#endif + { "POSIX2_PBS", _SC_2_PBS, SYSCONF }, + { "POSIX2_PBS_ACCOUNTING", _SC_2_PBS_ACCOUNTING, SYSCONF }, + { "POSIX2_PBS_LOCATE", _SC_2_PBS_LOCATE, SYSCONF }, + { "POSIX2_PBS_TRACK", _SC_2_PBS_TRACK, SYSCONF }, + { "POSIX2_PBS_MESSAGE", _SC_2_PBS_MESSAGE, SYSCONF }, + { "SYMLOOP_MAX", _SC_SYMLOOP_MAX, SYSCONF }, + { "STREAM_MAX", _SC_STREAM_MAX, SYSCONF }, + { "AIO_LISTIO_MAX", _SC_AIO_LISTIO_MAX, SYSCONF }, + { "AIO_MAX", _SC_AIO_MAX, SYSCONF }, +#ifdef _SC_AIO_PRIO_DELTA_MAX + { "AIO_PRIO_DELTA_MAX", _SC_AIO_PRIO_DELTA_MAX, SYSCONF }, +#endif + { "DELAYTIMER_MAX", _SC_DELAYTIMER_MAX, SYSCONF }, + { "HOST_NAME_MAX", _SC_HOST_NAME_MAX, SYSCONF }, + { "LOGIN_NAME_MAX", _SC_LOGIN_NAME_MAX, SYSCONF }, + { "MQ_OPEN_MAX", _SC_MQ_OPEN_MAX, SYSCONF }, + { "MQ_PRIO_MAX", _SC_MQ_PRIO_MAX, SYSCONF }, +#ifdef _SC_DEVICE_IO + { "_POSIX_DEVICE_IO", _SC_DEVICE_IO, SYSCONF }, +#endif +#ifdef _SC_TRACE + { "_POSIX_TRACE", _SC_TRACE, SYSCONF }, +#endif +#ifdef _SC_TRACE_EVENT_FILTER + { "_POSIX_TRACE_EVENT_FILTER", _SC_TRACE_EVENT_FILTER, SYSCONF }, +#endif +#ifdef _SC_TRACE_INHERIT + { "_POSIX_TRACE_INHERIT", _SC_TRACE_INHERIT, SYSCONF }, +#endif +#ifdef _SC_TRACE_LOG + { "_POSIX_TRACE_LOG", _SC_TRACE_LOG, SYSCONF }, +#endif + { "RTSIG_MAX", _SC_RTSIG_MAX, SYSCONF }, +#ifdef _SC_SEM_NSEMS_MAX + { "SEM_NSEMS_MAX", _SC_SEM_NSEMS_MAX, SYSCONF }, +#endif +#ifdef _SC_SEM_VALUE_MAX + { "SEM_VALUE_MAX", _SC_SEM_VALUE_MAX, SYSCONF }, +#endif + { "SIGQUEUE_MAX", _SC_SIGQUEUE_MAX, SYSCONF }, + { "FILESIZEBITS", _PC_FILESIZEBITS, PATHCONF }, +#ifdef _PC_ALLOC_SIZE_MIN + { "POSIX_ALLOC_SIZE_MIN", _PC_ALLOC_SIZE_MIN, PATHCONF }, +#endif +#ifdef _PC_REC_INCR_XFER_SIZE + { "POSIX_REC_INCR_XFER_SIZE", _PC_REC_INCR_XFER_SIZE, PATHCONF }, +#endif +#ifdef _PC_REC_MAX_XFER_SIZE + { "POSIX_REC_MAX_XFER_SIZE", _PC_REC_MAX_XFER_SIZE, PATHCONF }, +#endif +#ifdef _PC_REC_MIN_XFER_SIZE + { "POSIX_REC_MIN_XFER_SIZE", _PC_REC_MIN_XFER_SIZE, PATHCONF }, +#endif +#ifdef _PC_REC_XFER_ALIGN + { "POSIX_REC_XFER_ALIGN", _PC_REC_XFER_ALIGN, PATHCONF }, +#endif + { "SYMLINK_MAX", _PC_SYMLINK_MAX, PATHCONF }, +#ifdef _PC_2_SYMLINKS + { "POSIX2_SYMLINKS", _PC_2_SYMLINKS, PATHCONF }, +#endif + +#ifdef _SC_LEVEL1_ICACHE_SIZE + { "LEVEL1_ICACHE_SIZE", _SC_LEVEL1_ICACHE_SIZE, SYSCONF }, + { "LEVEL1_ICACHE_ASSOC", _SC_LEVEL1_ICACHE_ASSOC, SYSCONF }, + { "LEVEL1_ICACHE_LINESIZE", _SC_LEVEL1_ICACHE_LINESIZE, SYSCONF }, + { "LEVEL1_DCACHE_SIZE", _SC_LEVEL1_DCACHE_SIZE, SYSCONF }, + { "LEVEL1_DCACHE_ASSOC", _SC_LEVEL1_DCACHE_ASSOC, SYSCONF }, + { "LEVEL1_DCACHE_LINESIZE", _SC_LEVEL1_DCACHE_LINESIZE, SYSCONF }, +#endif +#ifdef _SC_LEVEL2_CACHE_SIZE + { "LEVEL2_CACHE_SIZE", _SC_LEVEL2_CACHE_SIZE, SYSCONF }, + { "LEVEL2_CACHE_ASSOC", _SC_LEVEL2_CACHE_ASSOC, SYSCONF }, + { "LEVEL2_CACHE_LINESIZE", _SC_LEVEL2_CACHE_LINESIZE, SYSCONF }, +#endif +#ifdef _SC_LEVEL3_CACHE_SIZE + { "LEVEL3_CACHE_SIZE", _SC_LEVEL3_CACHE_SIZE, SYSCONF }, + { "LEVEL3_CACHE_ASSOC", _SC_LEVEL3_CACHE_ASSOC, SYSCONF }, + { "LEVEL3_CACHE_LINESIZE", _SC_LEVEL3_CACHE_LINESIZE, SYSCONF }, +#endif +#ifdef _SC_LEVEL4_CACHE_SIZE + { "LEVEL4_CACHE_SIZE", _SC_LEVEL4_CACHE_SIZE, SYSCONF }, + { "LEVEL4_CACHE_ASSOC", _SC_LEVEL4_CACHE_ASSOC, SYSCONF }, + { "LEVEL4_CACHE_LINESIZE", _SC_LEVEL4_CACHE_LINESIZE, SYSCONF }, +#endif + +#ifdef _SC_IPV6 + { "IPV6", _SC_IPV6, SYSCONF }, + { "_POSIX_IPV6", _SC_IPV6, SYSCONF }, +#endif +#ifdef _SC_RAW_SOCKETS + { "RAW_SOCKETS", _SC_RAW_SOCKETS, SYSCONF }, + { "_POSIX_RAW_SOCKETS", _SC_RAW_SOCKETS, SYSCONF }, +#endif + + { NULL, 0, SYSCONF } + }; + +static int getconf_print (const struct conf *, const char *, int); +static int getconf_all (void); +static int getconf_one (WORD_LIST *); +static int getconf_internal (const struct conf *, int); + +static int +getconf_internal (const struct conf *c, int all) +{ + long l, val; + intmax_t v; + uintmax_t uv; + unsigned long ul; +#if HAVE_LONG_LONG_INT + unsigned long long ull; + long long ll; +#endif + int r; + + val = c->call_name; + r = EXECUTION_SUCCESS; + if (val == VAL_ULONG_MAX) + { + ul = ULONG_MAX; + printf ("%lu", ul); + } +#if HAVE_LONG_LONG_INT + else if (val == VAL_ULLONG_MAX) + { + ull = ULLONG_MAX; + printf ("%llu", ull); + } + else if (val == VAL_LLONG_MIN || val == VAL_LLONG_MAX) + { + ll = (val == VAL_LLONG_MIN) ? LLONG_MIN : LLONG_MAX; + printf ("%lld", ll); + } +#endif +#if HAVE_LONG_LONG_INT + else if (val == VAL_SSIZE_MAX) + { + ll = SSIZE_MAX; + printf ("%lld", ll); + } + else if (val == VAL_SIZE_MAX) + { + ul = SIZE_MAX; + printf ("%lu", ul); + } +#else + else if (val == VAL_SSIZE_MAX) + { + v = SSIZE_MAX; + printf ("%jd", v); + } + else if (val == VAL_SIZE_MAX) + { + uv = SIZE_MAX; + printf ("%ju", uv); + } +#endif + else + printf ("%ld", val); + + if (r == EXECUTION_SUCCESS) + printf ("\n"); + + return (r); +} + +static int +getconf_all (void) +{ + const struct conf *c; + char *path; + int r; + + r = EXECUTION_SUCCESS; + for (c = vars; c->name != NULL; ++c) + { + printf("%-35s", c->name); + path = "/"; /* XXX for now */ + if (getconf_print (c, path, 1) == EXECUTION_FAILURE) + r = EXECUTION_FAILURE; + } + return (r); +} + +static int +getconf_one (WORD_LIST *list) +{ + const struct conf *c; + char *vname, *vpath; + + vname = list->word->word; + vpath = (list->next && list->next->word) ? list->next->word->word : 0; + + for (c = vars; c->name != NULL; ++c) + { + if (strcmp (c->name, vname) == 0 || (strncmp (c->name, "_POSIX_", 7) == 0 && + strcmp (c->name + 7, vname) == 0)) + break; + } + if (c->name == NULL) + { + builtin_error ("%s: unknown variable", vname); + return (EXECUTION_FAILURE); + } + + if (c->call_name == PATHCONF && list->next == 0) + { + builtin_usage (); + return (EX_USAGE); + } + else if (c->call_name != PATHCONF && list->next) + { + builtin_usage (); + return (EX_USAGE); + } + + return (getconf_print (c, vpath, 0)); +} + +static int +getconf_print (const struct conf *c, const char *vpath, int all) +{ + long value; + size_t clen; + char *cvalue; + int cn; + + cn = c->call_name; + switch (c->call) + { + case PATHCONF: + errno = 0; + value = pathconf (vpath, cn); + if (value == -1L) + { + if (errno) + builtin_error ("pathconf %s: %s: %s", c->name, vpath, strerror (errno)); + printf ("undefined\n"); + return (EXECUTION_FAILURE); + } + else + printf ("%ld\n", value); + return (EXECUTION_SUCCESS); + + case SYSCONF: + errno = 0; + value = sysconf (cn); + if (value == -1L) + { + if (errno) + builtin_error ("%s: %s", c->name, strerror (errno)); + printf ("undefined\n"); + return (EXECUTION_FAILURE); + } + else + printf ("%ld\n", value); + return (EXECUTION_SUCCESS); + + case CONFSTR: + errno = 0; + clen = confstr (cn, (char *) NULL, 0); + cvalue = (char *) malloc (clen); + if (cvalue == NULL) + { + builtin_error ("memory allocation failure"); + return (EXECUTION_FAILURE); + } + if (confstr (c->call_name, cvalue, clen) != clen) + { + if (errno != 0) + builtin_error ("%s: confstr: %s", c->name, strerror (errno)); + printf ("undefined\n"); + return (EXECUTION_FAILURE); + } + else + printf ("%.*s\n", (int) clen, cvalue); + free (cvalue); + return (EXECUTION_SUCCESS); + + case CONSTANT: + return (getconf_internal (c, all)); + + case UNDEFINED: + builtin_error ("%s: undefined", c->name); + return (EXECUTION_FAILURE); + } + + /* NOTREACHED */ + return (EX_USAGE); +} + +int +getconf_builtin (WORD_LIST *list) +{ + const struct conf *c; + int r, opt, aflag, vflag; + char *varg; + + aflag = vflag = 0; + varg = 0; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "ahv:")) != -1) + { + switch (opt) + { + case 'a': + aflag = 1; + break; + CASE_HELPOPT; + case 'h': + builtin_help (); + return (EX_USAGE); + case 'v': + return (EX_DISKFALLBACK); + default: + builtin_usage (); + return (EX_USAGE); + } + } + + list = loptend; + if ((aflag == 0 && list == 0) || (aflag && list) || list_length(list) > 2) + { + builtin_usage(); + return (EX_USAGE); + } + + r = aflag ? getconf_all () : getconf_one (list); + return r; +} + +static char *getconf_doc[] = { + "Display values of system limits and options.", + "", + "getconf writes the current value of a configurable system limit or", + "option variable to the standard output.", + (char *)NULL +}; + +struct builtin getconf_struct = { + "getconf", + getconf_builtin, + BUILTIN_ENABLED, + getconf_doc, + "getconf -[ah] or getconf [-v spec] sysvar or getconf [-v spec] pathvar pathname", + 0 +}; diff --git a/examples/loadables/getconf.h b/examples/loadables/getconf.h new file mode 100644 index 0000000..b8b9f10 --- /dev/null +++ b/examples/loadables/getconf.h @@ -0,0 +1,136 @@ +/* + Copyright (C) 2021 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ +/* getconf.h -- replacement definitions for ones the system doesn't provide + and don't appear in <typemax.h> */ + +#ifndef _GETCONF_H +#define _GETCONF_H + +/* Some systems do not define these; use POSIX.2 minimum recommended values. */ +#ifndef _POSIX2_COLL_WEIGHTS_MAX +# define _POSIX2_COLL_WEIGHTS_MAX 2 +#endif + +/* If we're on a posix system, but the system doesn't define the necessary + constants, use posix.1 minimum values. */ +#if defined (_POSIX_VERSION) + +#ifndef _POSIX_ARG_MAX +# define _POSIX_ARG_MAX 4096 +#endif +#ifndef _POSIX_CHILD_MAX +# define _POSIX_CHILD_MAX 6 +#endif +#ifndef _POSIX_LINK_MAX +# define _POSIX_LINK_MAX 8 +#endif +#ifndef _POSIX_MAX_CANON +# define _POSIX_MAX_CANON 255 +#endif +#ifndef _POSIX_MAX_INPUT +# define _POSIX_MAX_INPUT 255 +#endif +#ifndef _POSIX_NAME_MAX +# define _POSIX_NAME_MAX 14 +#endif +#ifndef _POSIX_NGROUPS_MAX +# define _POSIX_NGROUPS_MAX 0 +#endif +#ifndef _POSIX_OPEN_MAX +# define _POSIX_OPEN_MAX 16 +#endif +#ifndef _POSIX_PATH_MAX +# define _POSIX_PATH_MAX 255 +#endif +#ifndef _POSIX_PIPE_BUF +# define _POSIX_PIPE_BUF 512 +#endif +#ifndef _POSIX_SSIZE_MAX +# define _POSIX_SSIZE_MAX 32767 +#endif +#ifndef _POSIX_STREAM_MAX +# define _POSIX_STREAM_MAX 8 +#endif +#ifndef _POSIX_TZNAME_MAX +# define _POSIX_TZNAME_MAX 3 +#endif + +#ifndef _POSIX2_BC_BASE_MAX +# define _POSIX2_BC_BASE_MAX 99 +#endif +#ifndef _POSIX2_BC_DIM_MAX +# define _POSIX2_BC_DIM_MAX 2048 +#endif +#ifndef _POSIX2_BC_SCALE_MAX +# define _POSIX2_BC_SCALE_MAX 99 +#endif +#ifndef _POSIX2_BC_STRING_MAX +# define _POSIX2_BC_STRING_MAX 1000 +#endif +#ifndef _POSIX2_EQUIV_CLASS_MAX +# define _POSIX2_EQUIV_CLASS_MAX 2 +#endif +#ifndef _POSIX2_EXPR_NEST_MAX +# define _POSIX2_EXPR_NEST_MAX 32 +#endif +#ifndef _POSIX2_LINE_MAX +# define _POSIX2_LINE_MAX 2048 +#endif +#ifndef _POSIX2_RE_DUP_MAX +# define _POSIX2_RE_DUP_MAX 255 +#endif + +#endif /* _POSIX_VERSION */ + +/* ANSI/ISO C, POSIX.1-200x, XPG 4.2, and C language type limits. + Defined only if the system include files and <typemax.h> don't. */ + +#ifndef CHAR_MAX +# define CHAR_MAX 127 +#endif +#ifndef CHAR_MIN +# define CHAR_MIN -128 +#endif +#ifndef SCHAR_MAX +# define SCHAR_MAX 127 +#endif +#ifndef SCHAR_MIN +# define SCHAR_MIN -128 +#endif + +#ifndef INT_BIT +# define INT_BIT (sizeof (int) * CHAR_BIT) +#endif + +#ifndef LONG_BIT +# define LONG_BIT (sizeof (long int) * CHAR_BIT) +#endif + +#ifndef WORD_BIT +# define WORD_BIT (sizeof (int) * CHAR_BIT) +#endif + +#if !defined (PRIdMAX) +# if HAVE_LONG_LONG +# define PRIdMAX "lld" +# else +# define PRIdMAX "ld" +# endif +#endif + +#endif /* _GETCONF_H */ diff --git a/examples/loadables/head.c b/examples/loadables/head.c new file mode 100644 index 0000000..f9f022a --- /dev/null +++ b/examples/loadables/head.c @@ -0,0 +1,170 @@ +/* head - copy first part of files. */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include "bashtypes.h" +#include "posixstat.h" +#include "filecntl.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "bashansi.h" + +#include <stdio.h> +#include <errno.h> +#include "chartypes.h" + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +static void +munge_list (list) + WORD_LIST *list; +{ + WORD_LIST *l, *nl; + WORD_DESC *wd; + char *arg; + + for (l = list; l; l = l->next) + { + arg = l->word->word; + if (arg[0] != '-' || arg[1] == '-' || (DIGIT(arg[1]) == 0)) + return; + /* We have -[0-9]* */ + wd = make_bare_word (arg+1); + nl = make_word_list (wd, l->next); + l->word->word[1] = 'n'; + l->word->word[2] = '\0'; + l->next = nl; + l = nl; /* skip over new argument */ + } +} + +static int +file_head (fp, cnt) + FILE *fp; + int cnt; +{ + int ch; + + while (cnt--) + { + while ((ch = getc (fp)) != EOF) + { + QUIT; + if (putchar (ch) == EOF) + { + builtin_error ("write error: %s", strerror (errno)); + return EXECUTION_FAILURE; + } + QUIT; + if (ch == '\n') + break; + } + } + return (EXECUTION_SUCCESS); +} + +int +head_builtin (list) + WORD_LIST *list; +{ + int nline, opt, rval; + WORD_LIST *l; + FILE *fp; + + char *t; + + munge_list (list); /* change -num into -n num */ + + reset_internal_getopt (); + nline = 10; + while ((opt = internal_getopt (list, "n:")) != -1) + { + switch (opt) + { + case 'n': + nline = atoi (list_optarg); + if (nline <= 0) + { + builtin_error ("bad line count: %s", list_optarg); + return (EX_USAGE); + } + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) + return (file_head (stdin, nline)); + + for (rval = EXECUTION_SUCCESS, opt = 1, l = list; l; l = l->next) + { + fp = fopen (l->word->word, "r"); + if (fp == NULL) + { + builtin_error ("%s: %s", l->word->word, strerror (errno)); + continue; + } + if (list->next) /* more than one file */ + { + printf ("%s==> %s <==\n", opt ? "" : "\n", l->word->word); + opt = 0; + } + QUIT; + rval = file_head (fp, nline); + fclose (fp); + } + + return (rval); +} + +char *head_doc[] = { + "Display lines from beginning of file.", + "", + "Copy the first N lines from the input files to the standard output.", + "N is supplied as an argument to the `-n' option. If N is not given,", + "the first ten lines are copied.", + (char *)NULL +}; + +struct builtin head_struct = { + "head", /* builtin name */ + head_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + head_doc, /* array of long documentation strings. */ + "head [-n num] [file ...]", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/hello.c b/examples/loadables/hello.c new file mode 100644 index 0000000..b09362b --- /dev/null +++ b/examples/loadables/hello.c @@ -0,0 +1,96 @@ +/* Sample builtin to be dynamically loaded with enable -f and create a new + builtin. */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> + +#include "loadables.h" + +/* A builtin `xxx' is normally implemented with an `xxx_builtin' function. + If you're converting a command that uses the normal Unix argc/argv + calling convention, use argv = make_builtin_argv (list, &argc) and call + the original `main' something like `xxx_main'. Look at cat.c for an + example. + + Builtins should use internal_getopt to parse options. It is the same as + getopt(3), but it takes a WORD_LIST *. Look at print.c for an example + of its use. + + If the builtin takes no options, call no_options(list) before doing + anything else. If it returns a non-zero value, your builtin should + immediately return EX_USAGE. Look at logname.c for an example. + + A builtin command returns EXECUTION_SUCCESS for success and + EXECUTION_FAILURE to indicate failure. */ +int +hello_builtin (list) + WORD_LIST *list; +{ + printf("hello world\n"); + fflush (stdout); + return (EXECUTION_SUCCESS); +} + +int +hello_builtin_load (s) + char *s; +{ + printf ("hello builtin loaded\n"); + fflush (stdout); + return (1); +} + +void +hello_builtin_unload (s) + char *s; +{ + printf ("hello builtin unloaded\n"); + fflush (stdout); +} + +/* An array of strings forming the `long' documentation for a builtin xxx, + which is printed by `help xxx'. It must end with a NULL. By convention, + the first line is a short description. */ +char *hello_doc[] = { + "Sample builtin.", + "", + "this is the long doc for the sample hello builtin", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. The flags must include BUILTIN_ENABLED so the + builtin can be used. */ +struct builtin hello_struct = { + "hello", /* builtin name */ + hello_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + hello_doc, /* array of long documentation strings. */ + "hello", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/id.c b/examples/loadables/id.c new file mode 100644 index 0000000..f857b54 --- /dev/null +++ b/examples/loadables/id.c @@ -0,0 +1,329 @@ +/* + * id - POSIX.2 user identity + * + * (INCOMPLETE -- supplementary groups for other users not yet done) + * + * usage: id [-Ggu] [-nr] [user] + * + * The default output format looks something like: + * uid=xxx(chet) gid=xx groups=aa(aname), bb(bname), cc(cname) + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <stdio.h> +#include "bashtypes.h" +#include <pwd.h> +#include <grp.h> +#include "bashansi.h" + +#ifdef HAVE_LIMITS_H +# include <limits.h> +#else +# include <sys/param.h> +#endif + +#if !defined (HAVE_GETPW_DECLS) +extern struct passwd *getpwuid (); +#endif +extern struct group *getgrgid (); + +#include "shell.h" +#include "builtins.h" +#include "stdc.h" +#include "common.h" +#include "bashgetopt.h" + +#define ID_ALLGROUPS 0x001 /* -G */ +#define ID_GIDONLY 0x002 /* -g */ +#define ID_USENAME 0x004 /* -n */ +#define ID_USEREAL 0x008 /* -r */ +#define ID_USERONLY 0x010 /* -u */ + +#define ID_FLAGSET(s) ((id_flags & (s)) != 0) + +static int id_flags; + +static uid_t ruid, euid; +static gid_t rgid, egid; + +static char *id_user; + +static int inituser (); + +static int id_pruser (); +static int id_prgrp (); +static int id_prgroups (); +static int id_prall (); + +int +id_builtin (list) + WORD_LIST *list; +{ + int opt; + char *user; + + id_flags = 0; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "Ggnru")) != -1) + { + switch (opt) + { + case 'G': id_flags |= ID_ALLGROUPS; break; + case 'g': id_flags |= ID_GIDONLY; break; + case 'n': id_flags |= ID_USENAME; break; + case 'r': id_flags |= ID_USEREAL; break; + case 'u': id_flags |= ID_USERONLY; break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + user = list ? list->word->word : (char *)NULL; + + /* Check for some invalid option combinations */ + opt = ID_FLAGSET (ID_ALLGROUPS) + ID_FLAGSET (ID_GIDONLY) + ID_FLAGSET (ID_USERONLY); + if (opt > 1 || (opt == 0 && ((id_flags & (ID_USEREAL|ID_USENAME)) != 0))) + { + builtin_usage (); + return (EX_USAGE); + } + + if (list && list->next) + { + builtin_usage (); + return (EX_USAGE); + } + + if (inituser (user) < 0) + return (EXECUTION_FAILURE); + + opt = 0; + if (id_flags & ID_USERONLY) + opt += id_pruser ((id_flags & ID_USEREAL) ? ruid : euid); + else if (id_flags & ID_GIDONLY) + opt += id_prgrp ((id_flags & ID_USEREAL) ? rgid : egid); + else if (id_flags & ID_ALLGROUPS) + opt += id_prgroups (user); + else + opt += id_prall (user); + putchar ('\n'); + fflush (stdout); + + return (opt == 0 ? EXECUTION_SUCCESS : EXECUTION_FAILURE); +} + +static int +inituser (uname) + char *uname; +{ + struct passwd *pwd; + + if (uname) + { + pwd = getpwnam (uname); + if (pwd == 0) + { + builtin_error ("%s: no such user", uname); + return -1; + } + ruid = euid = pwd->pw_uid; + rgid = egid = pwd->pw_gid; + } + else + { + ruid = current_user.uid; + euid = current_user.euid; + rgid = current_user.gid; + egid = current_user.egid; + } + return 0; +} + +/* Print the name or value of user ID UID. */ +static int +id_pruser (uid) + int uid; +{ + struct passwd *pwd = NULL; + int r; + + r = 0; + if (id_flags & ID_USENAME) + { + pwd = getpwuid (uid); + if (pwd == NULL) + r = 1; + } + if (pwd) + printf ("%s", pwd->pw_name); + else + printf ("%u", (unsigned) uid); + + return r; +} + +/* Print the name or value of group ID GID. */ + +static int +id_prgrp (gid) + int gid; +{ + struct group *grp = NULL; + int r; + + r = 0; + if (id_flags & ID_USENAME) + { + grp = getgrgid (gid); + if (grp == NULL) + r = 1; + } + + if (grp) + printf ("%s", grp->gr_name); + else + printf ("%u", (unsigned) gid); + + return r; +} + +static int +id_prgroups (uname) + char *uname; +{ + int *glist, ng, i, r; + + r = 0; + id_prgrp (rgid); + if (egid != rgid) + { + putchar (' '); + id_prgrp (egid); + } + + if (uname) + { + builtin_error ("supplementary groups for other users not yet implemented"); + glist = (int *)NULL; + ng = 0; + r = 1; + } + else + glist = get_group_array (&ng); + + for (i = 0; i < ng; i++) + if (glist[i] != rgid && glist[i] != egid) + { + putchar (' '); + id_prgrp (glist[i]); + } + + return r; +} + +static int +id_prall (uname) + char *uname; +{ + int r, i, ng, *glist; + struct passwd *pwd; + struct group *grp; + + r = 0; + printf ("uid=%u", (unsigned) ruid); + pwd = getpwuid (ruid); + if (pwd == NULL) + r = 1; + else + printf ("(%s)", pwd->pw_name); + + printf (" gid=%u", (unsigned) rgid); + grp = getgrgid (rgid); + if (grp == NULL) + r = 1; + else + printf ("(%s)", grp->gr_name); + + if (euid != ruid) + { + printf (" euid=%u", (unsigned) euid); + pwd = getpwuid (euid); + if (pwd == NULL) + r = 1; + else + printf ("(%s)", pwd->pw_name); + } + + if (egid != rgid) + { + printf (" egid=%u", (unsigned) egid); + grp = getgrgid (egid); + if (grp == NULL) + r = 1; + else + printf ("(%s)", grp->gr_name); + } + + if (uname) + { + builtin_error ("supplementary groups for other users not yet implemented"); + glist = (int *)NULL; + ng = 0; + r = 1; + } + else + glist = get_group_array (&ng); + + if (ng > 0) + printf (" groups="); + for (i = 0; i < ng; i++) + { + if (i > 0) + printf (", "); + printf ("%u", (unsigned) glist[i]); + grp = getgrgid (glist[i]); + if (grp == NULL) + r = 1; + else + printf ("(%s)", grp->gr_name); + } + + return r; +} + +char *id_doc[] = { + "Display information about user." + "", + "Return information about user identity", + (char *)NULL +}; + +struct builtin id_struct = { + "id", + id_builtin, + BUILTIN_ENABLED, + id_doc, + "id [user]\n\tid -G [-n] [user]\n\tid -g [-nr] [user]\n\tid -u [-nr] [user]", + 0 +}; diff --git a/examples/loadables/ln.c b/examples/loadables/ln.c new file mode 100644 index 0000000..874e9db --- /dev/null +++ b/examples/loadables/ln.c @@ -0,0 +1,236 @@ +/* ln - make links */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include "bashtypes.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "posixstat.h" + +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +typedef int unix_link_syscall_t PARAMS((const char *, const char *)); + +#define LN_SYMLINK 0x01 +#define LN_UNLINK 0x02 +#define LN_NOFOLLOW 0x04 + +static unix_link_syscall_t *linkfn; +static int dolink (); + +int +ln_builtin (list) + WORD_LIST *list; +{ + int rval, opt, flags; + WORD_LIST *l; + char *sdir; + struct stat sb; + + flags = 0; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "fs")) != -1) + { + switch (opt) + { + case 'f': + flags |= LN_UNLINK; + break; + case 's': + flags |= LN_SYMLINK; + break; + case 'h': + case 'n': + flags |= LN_NOFOLLOW; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + linkfn = (flags & LN_SYMLINK) ? symlink : link; + + if (list->next == 0) /* ln target, equivalent to ln target . */ + return (dolink (list->word->word, ".", flags)); + + if (list->next->next == 0) /* ln target source */ + return (dolink (list->word->word, list->next->word->word, flags)); + + /* ln target1 target2 ... directory */ + + /* find last argument: target directory, and make sure it's an existing + directory. */ + for (l = list; l->next; l = l->next) + ; + sdir = l->word->word; + + if (stat(sdir, &sb) < 0) + { + builtin_error ("%s", sdir); + return (EXECUTION_FAILURE); + } + + if (S_ISDIR (sb.st_mode) == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + for (rval = EXECUTION_SUCCESS; list != l; list = list->next) + rval += dolink (list->word->word, sdir, flags); + + return rval; +} + +static char * +mkdirpath (dir, file) + char *dir, *file; +{ + int dlen, flen; + char *ret; + + dlen = strlen (dir); + flen = strlen (file); + + ret = xmalloc (2 + dlen + flen); + + strcpy (ret, dir); + if (ret[dlen - 1] != '/') + ret[dlen++] = '/'; + strcpy (ret + dlen, file); + return ret; +} + +#if defined (HAVE_LSTAT) +# define LSTAT lstat +# define LSTAT_OR_STAT_IF(c, f, b) ((c) ? lstat((f), (b)) : stat((f), (b))) +#else +# define LSTAT stat +# define LSTAT_OR_STAT_IF(c, f, b) (stat((f), (b))) +#endif + +static int +dolink (src, dst, flags) + char *src, *dst; + int flags; +{ + struct stat ssb, dsb; + int exists; + char *dst_path, *p; + + /* If we're not doing symlinks, the source must exist and not be a + directory. */ + if ((flags & LN_SYMLINK) == 0) + { + if (stat (src, &ssb) != 0) + { + builtin_error ("%s: %s", src, strerror (errno)); + return (EXECUTION_FAILURE); + } + if (S_ISDIR (ssb.st_mode)) + { + errno = EISDIR; + builtin_error ("%s: %s", src, strerror (errno)); + return (EXECUTION_FAILURE); + } + } + + /* If the destination is a directory, create the final filename by appending + the basename of the source to the destination. */ + dst_path = 0; + if ((LSTAT_OR_STAT_IF((flags & LN_NOFOLLOW), dst, &dsb) == 0) && S_ISDIR (dsb.st_mode)) + { + if ((p = strrchr (src, '/')) == 0) + p = src; + else + p++; + + dst_path = mkdirpath (dst, p); + dst = dst_path; + } + + exists = LSTAT (dst, &dsb) == 0; + + /* If -f was specified, and the destination exists, unlink it. */ + if ((flags & LN_UNLINK) && exists && unlink (dst) != 0) + { + builtin_error ("%s: cannot unlink: %s", dst, strerror (errno)); + FREE (dst_path); + return (EXECUTION_FAILURE); + } + + /* Perform the link. */ + if ((*linkfn) (src, dst) != 0) + { + builtin_error ("cannot link %s to %s: %s", dst, src, strerror (errno)); + FREE (dst_path); + return (EXECUTION_FAILURE); + } + + FREE (dst_path); + return (EXECUTION_SUCCESS); +} + +char *ln_doc[] = { + "Link files.", + "", + "Create a new directory entry with the same modes as the original", + "file. The -f option means to unlink any existing file, permitting", + "the link to occur. The -s option means to create a symbolic link.", + "By default, ln makes hard links. Specifying -n or its synonym -h", + "causes ln to not resolve symlinks in the target file or directory.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin ln_struct = { + "ln", /* builtin name */ + ln_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + ln_doc, /* array of long documentation strings. */ + "ln [-fhns] file1 [file2] OR ln [-fhns] file ... directory", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/loadables.h b/examples/loadables/loadables.h new file mode 100644 index 0000000..c730357 --- /dev/null +++ b/examples/loadables/loadables.h @@ -0,0 +1,34 @@ +/* loadables.h -- Include files needed by all loadable builtins */ + +/* Copyright (C) 2015 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + + +#ifndef __LOADABLES_H_ +#define __LOADABLES_H_ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#endif diff --git a/examples/loadables/logname.c b/examples/loadables/logname.c new file mode 100644 index 0000000..27e6591 --- /dev/null +++ b/examples/loadables/logname.c @@ -0,0 +1,74 @@ +/* logname - print login name of current user */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +int +logname_builtin (list) + WORD_LIST *list; +{ + char *np; + + if (no_options (list)) + return (EX_USAGE); + + np = getlogin (); + if (np == 0) + { + builtin_error ("cannot find username: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + printf ("%s\n", np); + return (EXECUTION_SUCCESS); +} + +char *logname_doc[] = { + "Display user login name.", + "", + "Write the current user's login name to the standard output", + "and exit. logname ignores the LOGNAME and USER variables.", + "logname ignores any non-option arguments.", + (char *)NULL +}; + +struct builtin logname_struct = { + "logname", + logname_builtin, + BUILTIN_ENABLED, + logname_doc, + "logname", + 0 +}; + diff --git a/examples/loadables/mkdir.c b/examples/loadables/mkdir.c new file mode 100644 index 0000000..a5b4930 --- /dev/null +++ b/examples/loadables/mkdir.c @@ -0,0 +1,245 @@ +/* mkdir - make directories */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#include "bashtypes.h" +#include "posixstat.h" +#include <errno.h> +#include <stdio.h> +#include "bashansi.h" +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +#define ISOCTAL(c) ((c) >= '0' && (c) <= '7') + +extern int parse_symbolic_mode (); + +static int make_path (); + +static int original_umask; + +int +mkdir_builtin (list) + WORD_LIST *list; +{ + int opt, pflag, mflag, omode, rval, nmode, parent_mode; + char *mode; + WORD_LIST *l; + + reset_internal_getopt (); + pflag = mflag = 0; + mode = (char *)NULL; + while ((opt = internal_getopt(list, "m:p")) != -1) + switch (opt) + { + case 'p': + pflag = 1; + break; + case 'm': + mflag = 1; + mode = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage(); + return (EX_USAGE); + } + list = loptend; + + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + if (mode == NULL) + omode = S_IRWXU | S_IRWXG | S_IRWXO; /* a=rwx */ + else if (ISOCTAL (*mode)) /* octal number */ + { + omode = read_octal (mode); + if (omode < 0) + { + builtin_error ("invalid file mode: %s", mode); + return (EXECUTION_FAILURE); + } + } + else /* symbolic mode */ + { + /* initial bits are a=rwx; the mode argument modifies them */ + omode = parse_symbolic_mode (mode, S_IRWXU | S_IRWXG | S_IRWXO); + if (omode < 0) + { + builtin_error ("invalid file mode: %s", mode); + return (EXECUTION_FAILURE); + } + } + + /* Make the new mode */ + original_umask = umask (0); + umask (original_umask); + + nmode = (S_IRWXU | S_IRWXG | S_IRWXO) & ~original_umask; + parent_mode = nmode | (S_IWUSR|S_IXUSR); /* u+wx */ + + /* Adjust new mode based on mode argument */ + nmode &= omode; + + for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next) + { + if (pflag && make_path (l->word->word, mflag, nmode, parent_mode)) + { + rval = EXECUTION_FAILURE; + continue; + } + else if (pflag == 0 && mkdir (l->word->word, nmode) < 0) + { + builtin_error ("cannot create directory `%s': %s", l->word->word, strerror (errno)); + rval = EXECUTION_FAILURE; + } + } + return rval; +} + +/* Make all the directories leading up to PATH, then create PATH. Note that + this changes the process's umask; make sure that all paths leading to a + return reset it to ORIGINAL_UMASK */ +static int +make_path (path, user_mode, nmode, parent_mode) + char *path; + int user_mode; + int nmode, parent_mode; +{ + int oumask; + struct stat sb; + char *p, *npath; + + if (stat (path, &sb) == 0) + { + if (S_ISDIR (sb.st_mode) == 0) + { + builtin_error ("`%s': file exists but is not a directory", path); + return 1; + } + + if (user_mode && chmod (path, nmode)) + { + builtin_error ("%s: %s", path, strerror (errno)); + return 1; + } + + return 0; + } + + oumask = umask (0); + npath = savestring (path); /* So we can write to it. */ + + /* Check whether or not we need to do anything with intermediate dirs. */ + + /* Skip leading slashes. */ + p = npath; + while (*p == '/') + p++; + + while (p = strchr (p, '/')) + { + *p = '\0'; + if (stat (npath, &sb) != 0) + { + if (mkdir (npath, 0)) + { + builtin_error ("cannot create directory `%s': %s", npath, strerror (errno)); + umask (original_umask); + free (npath); + return 1; + } + if (chmod (npath, parent_mode) != 0) + { + builtin_error ("cannot chmod directory `%s': %s", npath, strerror (errno)); + umask (original_umask); + free (npath); + return 1; + } + } + else if (S_ISDIR (sb.st_mode) == 0) + { + builtin_error ("`%s': file exists but is not a directory", npath); + umask (original_umask); + free (npath); + return 1; + } + + *p++ = '/'; /* restore slash */ + while (*p == '/') + p++; + } + + /* Create the final directory component. */ + if (stat (npath, &sb) && mkdir (npath, nmode)) + { + builtin_error ("cannot create directory `%s': %s", npath, strerror (errno)); + umask (original_umask); + free (npath); + return 1; + } + + umask (original_umask); + free (npath); + return 0; +} + +char *mkdir_doc[] = { + "Create directories.", + "", + "Make directories. Create the directories named as arguments, in", + "the order specified, using mode rwxrwxrwx as modified by the current", + "umask (see `help umask'). The -m option causes the file permission", + "bits of the final directory to be MODE. The MODE argument may be", + "an octal number or a symbolic mode like that used by chmod(1). If", + "a symbolic mode is used, the operations are interpreted relative to", + "an initial mode of \"a=rwx\". The -p option causes any required", + "intermediate directories in PATH to be created. The directories", + "are created with permission bits of rwxrwxrwx as modified by the current", + "umask, plus write and search permissions for the owner. mkdir", + "returns 0 if the directories are created successfully, and non-zero", + "if an error occurs.", + (char *)NULL +}; + +struct builtin mkdir_struct = { + "mkdir", + mkdir_builtin, + BUILTIN_ENABLED, + mkdir_doc, + "mkdir [-p] [-m mode] directory [directory ...]", + 0 +}; diff --git a/examples/loadables/mkfifo.c b/examples/loadables/mkfifo.c new file mode 100644 index 0000000..2bc4e98 --- /dev/null +++ b/examples/loadables/mkfifo.c @@ -0,0 +1,146 @@ +/* mkfifo - make FIFOs */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#include "bashtypes.h" +#include "posixstat.h" +#include <errno.h> +#include <stdio.h> +#include "bashansi.h" +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +#define ISOCTAL(c) ((c) >= '0' && (c) <= '7') + +extern int parse_symbolic_mode (); + +static int original_umask; + +int +mkfifo_builtin (list) + WORD_LIST *list; +{ + int opt, mflag, omode, rval, nmode, basemode; + char *mode; + WORD_LIST *l; + + mflag = 0; + mode = (char *)NULL; + + reset_internal_getopt (); + while ((opt = internal_getopt(list, "m:")) != -1) + switch (opt) + { + case 'm': + mflag = 1; + mode = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage(); + return (EX_USAGE); + } + list = loptend; + + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + basemode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; + if (mode == NULL) + omode = basemode; + else if (ISOCTAL (*mode)) /* octal number */ + { + omode = read_octal (mode); + if (omode < 0) + { + builtin_error ("invalid file mode: %s", mode); + return (EXECUTION_FAILURE); + } + } + else /* symbolic mode */ + { + /* initial bits are a=rwx; the mode argument modifies them */ + omode = parse_symbolic_mode (mode, basemode); + if (omode < 0) + { + builtin_error ("invalid file mode: %s", mode); + return (EXECUTION_FAILURE); + } + } + + /* Make the new mode */ + original_umask = umask (0); + umask (original_umask); + + nmode = basemode & ~original_umask; + /* Adjust new mode based on mode argument */ + nmode &= omode; + + for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next) + { + if (mkfifo (l->word->word, nmode) < 0) + { + builtin_error ("cannot create FIFO `%s': %s", l->word->word, strerror (errno)); + rval = EXECUTION_FAILURE; + } + } + return rval; +} + + +char *mkfifo_doc[] = { + "Create FIFOs (named pipes).", + "", + "Make FIFOs. Create the FIFOs named as arguments, in", + "the order specified, using mode a=rw as modified by the current", + "umask (see `help umask'). The -m option causes the file permission", + "bits of the final FIFO to be MODE. The MODE argument may be", + "an octal number or a symbolic mode like that used by chmod(1). If", + "a symbolic mode is used, the operations are interpreted relative to", + "an initial mode of \"a=rw\". mkfifo returns 0 if the FIFOs are", + "umask, plus write and search permissions for the owner. mkdir", + "created successfully, and non-zero if an error occurs.", + (char *)NULL +}; + +struct builtin mkfifo_struct = { + "mkfifo", + mkfifo_builtin, + BUILTIN_ENABLED, + mkfifo_doc, + "mkfifo [-m mode] fifo_name [fifo_name ...]", + 0 +}; diff --git a/examples/loadables/mktemp.c b/examples/loadables/mktemp.c new file mode 100644 index 0000000..1f7c9ad --- /dev/null +++ b/examples/loadables/mktemp.c @@ -0,0 +1,212 @@ +/* mktemp - create temporary file or directory */ + +/* + Copyright (C) 2019 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> +#include "bashansi.h" + +#include "loadables.h" + +#define DEFAULT_PREFIX "shtmp" + +int +mktemp_builtin (list) + WORD_LIST *list; +{ + WORD_LIST *l; + int rval, opt, fd, mflags, base_mflags; + int dflag, qflag, tflag, uflag, onetime; + char *prefix, *varname, *filename, *template; + SHELL_VAR *v; + + dflag = qflag = uflag = tflag = onetime = 0; + prefix = varname = 0; + rval = EXECUTION_SUCCESS; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "dqut:v:")) != -1) + { + switch (opt) + { + case 'd': + dflag = 1; + break; + case 'q': + qflag = 1; + break; + case 't': + tflag = 1; + prefix = list_optarg; + break; + case 'u': + uflag = 1; + break; + case 'v': + varname = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (varname) /* check for validity, not readonly */ + { + if (legal_identifier (varname) == 0) + { + if (qflag == 0) + sh_invalidid (varname); + return (EXECUTION_FAILURE); + } + v = find_variable (varname); + if (v && readonly_p (v)) + { + if (qflag == 0) + sh_readonly (varname); + return (EXECUTION_FAILURE); + } + } + + onetime = (list == 0); /* once through the loop, $TMPDIR/prefix.XXXXXX */ + + if (prefix == 0) + prefix = DEFAULT_PREFIX; + base_mflags = MT_USETMPDIR|MT_USERANDOM; /* USERANDOM not strictly needed */ + + while (list || onetime) + { + mflags = base_mflags; + onetime = 0; +#if defined (USE_MKTEMP) && defined (USE_MKSTEMP) + if (list) + { + template = list->word->word; + mflags |= MT_TEMPLATE; + } +#else + /* This is sub-optimal. */ + if (list) + { + /* Treat the basename as a prefix */ + template = strrchr (list->word->word, '/'); + if (template) + template++; + else + template = list->word->word; + } +#endif + else + template = prefix; + + if (dflag) + { + filename = sh_mktmpdir (template, mflags); + if (filename == 0) + { + if (qflag == 0) + builtin_error ("%s: cannot create directory", template); + rval = EXECUTION_FAILURE; + } + else + { + if (uflag) + rmdir (filename); + printf ("%s\n", filename); + } + } + else /* filename */ + { + fd = sh_mktmpfd (template, mflags, &filename); + if (fd < 0) + { + if (qflag == 0) + builtin_error ("%s: cannot create file", template); + rval = EXECUTION_FAILURE; + } + else + { + close (fd); + if (uflag) + unlink (filename); + printf ("%s\n", filename); + } + } + + /* Assign variable if requested */ + if (filename && varname) + { + v = builtin_bind_variable (varname, filename, 0); + if (v == 0 || readonly_p (v) || noassign_p (v)) + { + builtin_error ("%s: cannot set variable", varname); + rval = EXECUTION_FAILURE; + } + } + + FREE (filename); + + if (list) + list = list->next; + } + + return (rval); +} + +char *mktemp_doc[] = { + "Make unique temporary file name", + "", + "Take each supplied filename template and overwrite a portion of it", + "to create a filename, which is unique and may be used by the calling", + "script. TEMPLATE is a string ending in some number of 'X's. If", + "TEMPLATE is not supplied, shtmp.XXXXXX is used and $TMPDIR is used as", + "the name of the containing directory. Files are created u+rw; directories", + "are created u+rwx.", + "", + "Options, if supplied, have the following meanings:", + "", + " -d Create a directory instead of a file", + " -q Do not print error messages about file creation failure", + " -t PREFIX Use PREFIX as the directory in which to create files", + " -u Do not create anything; simply print a name", + " -v VAR Store the generated name into shell variable VAR", + "", + "Any PREFIX supplied with -t is ignored if TEMPLATE is supplied.", + "", + "The return status is true if the file or directory was created successfully;", + "false if an error occurs or VAR is invalid or readonly.", + + (char *)NULL +}; + +struct builtin mktemp_struct = { + "mktemp", /* builtin name */ + mktemp_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + mktemp_doc, /* array of long documentation strings. */ + "mktemp [-d] [-q] [-t prefix] [-u] [-v varname] [template] ...", + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/mypid.c b/examples/loadables/mypid.c new file mode 100644 index 0000000..fc1b267 --- /dev/null +++ b/examples/loadables/mypid.c @@ -0,0 +1,89 @@ +/* This module should be dynamically loaded with enable -f + * which would create a new builtin named mypid. You'll need + * the source code for GNU bash to recompile this module. + * + * Then, from within bash, enable -f ./mypid enable_mypid, where ./mypid + * is the binary obtained from running make. Hereafter, `${MYPID}' + * is a shell builtin variable. + * + * This defines an unload hook function that is called when the builtin is + * deleted with enable -d that will unbind the MYPID variable so future + * references to it do not attempt to access memory that is no longer part + * of this process's address space. + */ +#include <config.h> + +#include <stdio.h> +#include <errno.h> +#include <string.h> + +#include "builtins.h" +#include "shell.h" + +#define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \ + do \ + { SHELL_VAR *v = bind_variable (var, (val), 0); \ + if (v) \ + { \ + v->dynamic_value = gfunc; \ + v->assign_func = afunc; \ + } \ + } \ + while (0) + +static SHELL_VAR * +assign_mypid ( + SHELL_VAR *self, + char *value, + arrayind_t unused, + char *key ) +{ + return (self); +} + +static SHELL_VAR * +get_mypid (SHELL_VAR *var) +{ + int rv; + char *p; + + rv = getpid(); + p = itos (rv); + + FREE (value_cell (var)); + + VSETATTR (var, att_integer); + var_setvalue (var, p); + return (var); +} + +int +enable_mypid_builtin(WORD_LIST *list) +{ + INIT_DYNAMIC_VAR ("MYPID", (char *)NULL, get_mypid, assign_mypid); + + return 0; +} + +void +enable_mypid_builtin_unload (char *s) +{ + unbind_variable ("MYPID"); +} + +char const *enable_mypid_doc[] = { + "Enable $MYPID.", + "", + "Enables use of the ${MYPID} dynamic variable. ", + "It will yield the current pid of a subshell.", + (char *)0 +}; + +struct builtin enable_mypid_struct = { + "enable_mypid", + enable_mypid_builtin, + BUILTIN_ENABLED, + (char**)(void*)enable_mypid_doc, + "enable_mypid N", + 0 +}; diff --git a/examples/loadables/necho.c b/examples/loadables/necho.c new file mode 100644 index 0000000..dd2092b --- /dev/null +++ b/examples/loadables/necho.c @@ -0,0 +1,54 @@ +/* necho - echo without options or argument interpretation */ + +/* Sample builtin to be dynamically loaded with enable -f and replace an + existing builtin. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <stdio.h> +#include "builtins.h" +#include "shell.h" + +int +necho_builtin (list) +WORD_LIST *list; +{ + print_word_list (list, " "); + printf("\n"); + fflush (stdout); + return (EXECUTION_SUCCESS); +} + +char *necho_doc[] = { + "Display arguments.", + "", + "Print the arguments to the standard output separated", + "by space characters and terminated with a newline.", + (char *)NULL +}; + +struct builtin necho_struct = { + "echo", + necho_builtin, + BUILTIN_ENABLED, + necho_doc, + "echo [args]", + 0 +}; + diff --git a/examples/loadables/pathchk.c b/examples/loadables/pathchk.c new file mode 100644 index 0000000..c1151db --- /dev/null +++ b/examples/loadables/pathchk.c @@ -0,0 +1,381 @@ +/* pathchk - check pathnames for validity and portability */ + +/* Usage: pathchk [-p] path ... + + For each PATH, print a message if any of these conditions are false: + * all existing leading directories in PATH have search (execute) permission + * strlen (PATH) <= PATH_MAX + * strlen (each_directory_in_PATH) <= NAME_MAX + + Exit status: + 0 All PATH names passed all of the tests. + 1 An error occurred. + + Options: + -p Instead of performing length checks on the + underlying filesystem, test the length of the + pathname and its components against the POSIX.1 + minimum limits for portability, _POSIX_NAME_MAX + and _POSIX_PATH_MAX in 2.9.2. Also check that + the pathname contains no character not in the + portable filename character set. */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#include <sys/types.h> +#include "posixstat.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#if defined (HAVE_LIMITS_H) +# include <limits.h> +#endif + +#include "bashansi.h" + +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "stdc.h" +#include "bashgetopt.h" +#include "maxpath.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +#if !defined (_POSIX_PATH_MAX) +# define _POSIX_PATH_MAX 255 +#endif +#if !defined (_POSIX_NAME_MAX) +# define _POSIX_NAME_MAX 14 +#endif + +/* How do we get PATH_MAX? */ +#if defined (_POSIX_VERSION) && !defined (PATH_MAX) +# define PATH_MAX_FOR(p) pathconf ((p), _PC_PATH_MAX) +#endif + +/* How do we get NAME_MAX? */ +#if defined (_POSIX_VERSION) && !defined (NAME_MAX) +# define NAME_MAX_FOR(p) pathconf ((p), _PC_NAME_MAX) +#endif + +#if !defined (PATH_MAX_FOR) +# define PATH_MAX_FOR(p) PATH_MAX +#endif + +#if !defined (NAME_MAX_FOR) +# define NAME_MAX_FOR(p) NAME_MAX +#endif + +extern char *strerror (); + +static int validate_path (); + +int +pathchk_builtin (list) + WORD_LIST *list; +{ + int retval, pflag, opt; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "p")) != -1) + { + switch (opt) + { + case 'p': + pflag = 1; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + for (retval = 0; list; list = list->next) + retval |= validate_path (list->word->word, pflag); + + return (retval ? EXECUTION_FAILURE : EXECUTION_SUCCESS); +} + +char *pathchk_doc[] = { + "Check pathnames for validity.", + "", + "Check each pathname argument for validity (i.e., it may be used to", + "create or access a file without causing syntax errors) and portability", + "(i.e., no filename truncation will result). If the `-p' option is", + "supplied, more extensive portability checks are performed.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin pathchk_struct = { + "pathchk", /* builtin name */ + pathchk_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + pathchk_doc, /* array of long documentation strings. */ + "pathchk [-p] pathname ...", /* usage synopsis */ + 0 /* reserved for internal use */ +}; + +/* The remainder of this file is stolen shamelessly from `pathchk.c' in + the sh-utils-1.12 distribution, by + + David MacKenzie <djm@gnu.ai.mit.edu> + and Jim Meyering <meyering@cs.utexas.edu> */ + +/* Each element is nonzero if the corresponding ASCII character is + in the POSIX portable character set, and zero if it is not. + In addition, the entry for `/' is nonzero to simplify checking. */ +static char const portable_chars[256] = +{ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0-15 */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 16-31 */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, /* 32-47 */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, /* 48-63 */ + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 64-79 */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, /* 80-95 */ + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 96-111 */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, /* 112-127 */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +/* If PATH contains only portable characters, return 1, else 0. */ + +static int +portable_chars_only (path) + const char *path; +{ + const char *p; + + for (p = path; *p; ++p) + if (portable_chars[(const unsigned char) *p] == 0) + { + builtin_error ("path `%s' contains nonportable character `%c'", path, *p); + return 0; + } + return 1; +} + +/* On some systems, stat can return EINTR. */ + +#ifndef EINTR +# define SAFE_STAT(name, buf) stat (name, buf) +#else +# define SAFE_STAT(name, buf) safe_stat (name, buf) +static inline int +safe_stat (name, buf) + const char *name; + struct stat *buf; +{ + int ret; + + do + ret = stat (name, buf); + while (ret < 0 && errno == EINTR); + + return ret; +} +#endif + +/* Return 1 if PATH is a usable leading directory, 0 if not, + 2 if it doesn't exist. */ + +static int +dir_ok (path) + const char *path; +{ + struct stat stats; + + if (SAFE_STAT (path, &stats)) + return 2; + + if (!S_ISDIR (stats.st_mode)) + { + builtin_error ("`%s' is not a directory", path); + return 0; + } + + /* Use access to test for search permission because + testing permission bits of st_mode can lose with new + access control mechanisms. Of course, access loses if you're + running setuid. */ + if (access (path, X_OK) != 0) + { + if (errno == EACCES) + builtin_error ("directory `%s' is not searchable", path); + else + builtin_error ("%s: %s", path, strerror (errno)); + return 0; + } + + return 1; +} + +static char * +xstrdup (s) + char *s; +{ + return (savestring (s)); +} + +/* Make sure that + strlen (PATH) <= PATH_MAX + && strlen (each-existing-directory-in-PATH) <= NAME_MAX + + If PORTABILITY is nonzero, compare against _POSIX_PATH_MAX and + _POSIX_NAME_MAX instead, and make sure that PATH contains no + characters not in the POSIX portable filename character set, which + consists of A-Z, a-z, 0-9, ., _, -. + + Make sure that all leading directories along PATH that exist have + `x' permission. + + Return 0 if all of these tests are successful, 1 if any fail. */ + +static int +validate_path (path, portability) + char *path; + int portability; +{ + int path_max; + int last_elem; /* Nonzero if checking last element of path. */ + int exists; /* 2 if the path element exists. */ + char *slash; + char *parent; /* Last existing leading directory so far. */ + + if (portability && !portable_chars_only (path)) + return 1; + + if (*path == '\0') + return 0; + +#ifdef lint + /* Suppress `used before initialized' warning. */ + exists = 0; +#endif + + /* Figure out the parent of the first element in PATH. */ + parent = xstrdup (*path == '/' ? "/" : "."); + + slash = path; + last_elem = 0; + while (1) + { + int name_max; + int length; /* Length of partial path being checked. */ + char *start; /* Start of path element being checked. */ + + /* Find the end of this element of the path. + Then chop off the rest of the path after this element. */ + while (*slash == '/') + slash++; + start = slash; + slash = strchr (slash, '/'); + if (slash != NULL) + *slash = '\0'; + else + { + last_elem = 1; + slash = strchr (start, '\0'); + } + + if (!last_elem) + { + exists = dir_ok (path); + if (exists == 0) + { + free (parent); + return 1; + } + } + + length = slash - start; + /* Since we know that `parent' is a directory, it's ok to call + pathconf with it as the argument. (If `parent' isn't a directory + or doesn't exist, the behavior of pathconf is undefined.) + But if `parent' is a directory and is on a remote file system, + it's likely that pathconf can't give us a reasonable value + and will return -1. (NFS and tempfs are not POSIX . . .) + In that case, we have no choice but to assume the pessimal + POSIX minimums. */ + name_max = portability ? _POSIX_NAME_MAX : NAME_MAX_FOR (parent); + if (name_max < 0) + name_max = _POSIX_NAME_MAX; + if (length > name_max) + { + builtin_error ("name `%s' has length %d; exceeds limit of %d", + start, length, name_max); + free (parent); + return 1; + } + + if (last_elem) + break; + + if (exists == 1) + { + free (parent); + parent = xstrdup (path); + } + + *slash++ = '/'; + } + + /* `parent' is now the last existing leading directory in the whole path, + so it's ok to call pathconf with it as the argument. */ + path_max = portability ? _POSIX_PATH_MAX : PATH_MAX_FOR (parent); + if (path_max < 0) + path_max = _POSIX_PATH_MAX; + free (parent); + if (strlen (path) > path_max) + { + builtin_error ("path `%s' has length %lu; exceeds limit of %d", + path, (unsigned long)strlen (path), path_max); + return 1; + } + + return 0; +} diff --git a/examples/loadables/perl/Makefile.in b/examples/loadables/perl/Makefile.in new file mode 100644 index 0000000..59f39b6 --- /dev/null +++ b/examples/loadables/perl/Makefile.in @@ -0,0 +1,99 @@ +# +# Makefile for builtin perl interpreter +# +# +# Copyright (C) 1998 Free Software Foundation, Inc. +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# Include some boilerplate Gnu makefile definitions. +prefix = @prefix@ +exec_prefix = @exec_prefix@ + +bindir = @bindir@ +libdir = @libdir@ +infodir = @infodir@ +includedir = @includedir@ + +datarootdir = @datarootdir@ + +topdir = @top_srcdir@ +BUILD_DIR = @BUILD_DIR@ +srcdir = @srcdir@ +VPATH = @srcdir@ + +@SET_MAKE@ +CC = @CC@ +RM = rm -f + +SHELL = @MAKE_SHELL@ + +PERL5 = perl5 + +CFLAGS = @CFLAGS@ + +# +# These values are generated for configure by ${topdir}/support/shobj-conf. +# If your system is not supported by that script, but includes facilities for +# dynamic loading of shared objects, please update the script and send the +# changes to bash-maintainers@gnu.org. +# +SHOBJ_CC = @SHOBJ_CC@ +SHOBJ_CFLAGS = @SHOBJ_CFLAGS@ +SHOBJ_LD = @SHOBJ_LD@ +SHOBJ_LDFLAGS = @SHOBJ_LDFLAGS@ +SHOBJ_XLDFLAGS = @SHOBJ_XLDFLAGS@ +SHOBJ_LIBS = @SHOBJ_LIBS@ +SHOBJ_STATUS = @SHOBJ_STATUS@ + +# Values used for compiling the perl files +PERL_LDOPTS = `${PERL5} -MExtUtils::Embed -e ldopts` +PERL_CFLAGS = ${CCFLAGS} `${PERL5} -MExtUtils::Embed -e ccopts` + +SRC = bperl.c iperl.c perlxsi.c +OBJ = bperl.o iperl.o perlxsi.o + +BUILTIN = bperl5 + +INC = -I. -I.. -I$(topdir) -I$(topdir)/lib -I$(topdir)/builtins \ + -I$(topdir)/include -I$(BUILD_DIR) -I$(BUILD_DIR)/lib \ + -I$(BUILD_DIR)/builtins + + +${BUILTIN}: ${OBJ} + ${RM} $@ + ${SHOBJ_LD} ${SHOBJ_LDFLAGS} ${SHOBJ_XLDFLAGS} -o $@ ${OBJ} ${PERL_LDOPTS} ${SHOBJ_LIBS} + +bperl.o: bperl.c + ${RM} $@ + $(SHOBJ_CC) $(SHOBJ_CFLAGS) $(CFLAGS) $(INC) -c -o $@ ${srcdir}/bperl.c + +iperl.o: iperl.c + ${RM} $@ + $(SHOBJ_CC) ${SHOBJ_CFLAGS} $(PERL_CFLAGS) -c -o $@ ${srcdir}/iperl.c + +perlxsi.c: + ${PERL5} -MExtUtils::Embed -e xsinit -- -o $@ + +perlxsi.o: perlxsi.c + ${RM} $@ + ${SHOBJ_CC} ${SHOBJ_CFLAGS} $(PERL_CFLAGS) -c -o $@ perlxsi.c + +clean mostlyclean: + ${RM} ${OBJ} + ${RM} ${BUILTIN} + +distclean maintainer-clean: clean + ${RM} perlxsi.c diff --git a/examples/loadables/perl/README b/examples/loadables/perl/README new file mode 100644 index 0000000..a70a99b --- /dev/null +++ b/examples/loadables/perl/README @@ -0,0 +1,6 @@ +This illustrates how to build a perl interpreter into bash. It's not +especially useful; more a proof of concept (it provides none of the +bash internals to the perl interpreter, for example). + +This *may* require adding "-rpath /path/to/perl/CORE" and -lperl options +when compiling bash itself. diff --git a/examples/loadables/perl/bperl.c b/examples/loadables/perl/bperl.c new file mode 100644 index 0000000..5b15258 --- /dev/null +++ b/examples/loadables/perl/bperl.c @@ -0,0 +1,53 @@ +/* + * perl builtin + */ +#include <config.h> + +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "common.h" + +#ifndef errno +extern int errno; +#endif + +extern char **make_builtin_argv (WORD_LIST *, int *); +extern char **export_env; + +extern void perl_close(void); +extern int perl_main(int, char **, char **); + +int +bperl_builtin(WORD_LIST *list) +{ + char **v; + int c, r; + + v = make_builtin_argv(list, &c); + r = perl_main(c, v, export_env); + free(v); + + return r; +} + +void +bperl_builtin_unload (char *s) +{ + perl_close(); +} + +char *bperl_doc[] = { + "An interface to a perl5 interpreter.", + (char *)0 +}; + +struct builtin bperl_struct = { + "bperl", + bperl_builtin, + BUILTIN_ENABLED, + bperl_doc, + "bperl [perl options] [file ...]", + 0 +}; diff --git a/examples/loadables/perl/iperl.c b/examples/loadables/perl/iperl.c new file mode 100644 index 0000000..89438af --- /dev/null +++ b/examples/loadables/perl/iperl.c @@ -0,0 +1,38 @@ +#include <EXTERN.h> /* from the Perl distribution */ +#include <perl.h> /* from the Perl distribution */ + +#define iperl my_perl /* I guess the name `my_perl' is required */ + +extern void xs_init (pTHX); + +static PerlInterpreter *iperl; /*** The Perl interpreter ***/ + +static int first = 1; + +void +perl_close (void) +{ + PERL_SYS_TERM(); +} + +int +perl_main(int argc, char **argv, char **env) +{ + int r; + + if (first) { + first = 0; + PERL_SYS_INIT3(&argc, &argv, &env); + } + iperl = perl_alloc(); + perl_construct(iperl); + perl_parse(iperl, xs_init, argc, argv, (char **)NULL); + r = perl_run(iperl); + +PerlIO_flush(PerlIO_stdout()); +PerlIO_flush(PerlIO_stderr()); + + perl_destruct(iperl); + perl_free(iperl); + return (r); +} diff --git a/examples/loadables/print.c b/examples/loadables/print.c new file mode 100644 index 0000000..d6c5903 --- /dev/null +++ b/examples/loadables/print.c @@ -0,0 +1,193 @@ +/* + * print -- loadable ksh-93 style print builtin + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include "bashtypes.h" + +#include <errno.h> +#include <limits.h> +#include <stdio.h> + +#include "bashansi.h" +#include "shell.h" +#include "builtins.h" +#include "stdc.h" +#include "bashgetopt.h" +#include "builtext.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +int print_builtin (); +static int printargs (); + +static FILE *ofp; + +extern char *this_command_name; + +static char *print_doc[] = { + "Display arguments.", + "", + "Output the arguments. The -f option means to use the argument as a", + "format string as would be supplied to printf(1). The rest of the", + "options are as in ksh.", + (char *)NULL +}; + +struct builtin print_struct = { + "print", + print_builtin, + BUILTIN_ENABLED, + print_doc, + "print [-Rnprs] [-u unit] [-f format] [arguments]", + (char *)0 +}; + +#ifndef ISOPTION +#define ISOPTION(s, c) (s[0] == '-' && s[2] == '\0' && s[1] == c) +#endif + +int +print_builtin (list) + WORD_LIST *list; +{ + int c, r, nflag, raw, ofd, sflag; + intmax_t lfd; + char **v, *pfmt, *arg; + WORD_LIST *l; + + nflag = raw = sflag = 0; + ofd = 1; + pfmt = 0; + + reset_internal_getopt (); + while ((c = internal_getopt (list, "Rnprsu:f:")) != -1) + { + switch (c) + { + case 'R': + raw = 2; + loptend = lcurrent; + if (loptend && ISOPTION (loptend->word->word, 'n')) + { + loptend = loptend->next; + nflag = 1; + } + goto opt_end; + case 'r': + raw = 1; + break; + case 'n': + nflag = 1; + break; + case 's': + sflag = 1; + break; + case 'p': + break; /* NOP */ + case 'u': + if (all_digits (list_optarg) && legal_number (list_optarg, &lfd) && lfd == (int)lfd) + ofd = lfd; + else + { + for (l = list; l->next && l->next != lcurrent; l = l->next); + lcurrent = loptend = l; + goto opt_end; + } + break; + case 'f': + pfmt = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + +opt_end: + list = loptend; + + ofp = (ofd == 1) ? stdout : fdopen (dup (ofd), "w"); + + if (pfmt) + { + WORD_DESC *w; + WORD_LIST *nlist; + + w = make_word (pfmt); + nlist = make_word_list (w, list); + r = printf_builtin (nlist); + nlist->next = (WORD_LIST *)NULL; + dispose_words (nlist); + return (r); + } + + if (raw) + { + for (l = list; l; l = l->next) + { + fprintf (ofp, "%s", l->word->word); + if (l->next) + fprintf (ofp, " "); + } + if (nflag == 0) + fprintf (ofp, "\n"); + fflush (ofp); + return (0); + } + + r = printargs (list, ofp); + if (r && nflag == 0) + fprintf (ofp, "\n"); + if (ofd != 1) + fclose (ofp); + return 0; +} + +static int +printargs (list, ofp) + WORD_LIST *list; + FILE *ofp; +{ + WORD_LIST *l; + char *ostr; + int sawc; + + for (sawc = 0, l = list; l; l = l->next) + { + ostr = ansicstr (l->word->word, strlen (l->word->word), 0, &sawc, (int *)0); + if (ostr) + fprintf (ofp, "%s", ostr); + free (ostr); + if (sawc) + return (0); + if (l->next) + fprintf (ofp, " "); + } + return (1); +} diff --git a/examples/loadables/printenv.c b/examples/loadables/printenv.c new file mode 100644 index 0000000..8c7f720 --- /dev/null +++ b/examples/loadables/printenv.c @@ -0,0 +1,94 @@ +/* + * printenv -- minimal builtin clone of BSD printenv(1). + * + * usage: printenv [varname] + * + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <stdio.h> + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +extern char **export_env; + +int +printenv_builtin (list) + WORD_LIST *list; +{ + register char **envp; + int opt; + SHELL_VAR *var; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "")) != -1) + { + switch (opt) + { + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + /* printenv */ + if (list == 0) + { + maybe_make_export_env (); /* this allows minimal code */ + for (envp = export_env; *envp; envp++) + printf ("%s\n", *envp); + return (EXECUTION_SUCCESS); + } + + /* printenv varname */ + var = find_variable (list->word->word); + if (var == 0 || (exported_p (var) == 0)) + return (EXECUTION_FAILURE); + + if (function_p (var)) + print_var_function (var); + else + print_var_value (var, 0); + + printf("\n"); + return (EXECUTION_SUCCESS); +} + +char *printenv_doc[] = { + "Display environment.", + "", + "Print names and values of environment variables", + (char *)NULL +}; + +struct builtin printenv_struct = { + "printenv", + printenv_builtin, + BUILTIN_ENABLED, + printenv_doc, + "printenv [varname]", + 0 +}; diff --git a/examples/loadables/push.c b/examples/loadables/push.c new file mode 100644 index 0000000..b27455b --- /dev/null +++ b/examples/loadables/push.c @@ -0,0 +1,117 @@ +/* + * push - anyone remember TOPS-20? + * + */ + +/* + Copyright (C) 1999-2020 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "jobs.h" +#include "bashgetopt.h" +#include "common.h" + +#ifndef errno +extern int errno; +#endif + +extern pid_t dollar_dollar_pid; +extern int last_command_exit_value; + +int +push_builtin (list) + WORD_LIST *list; +{ + pid_t pid; + int xstatus, opt; + + xstatus = EXECUTION_SUCCESS; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "")) != -1) + { + switch (opt) + { + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + pid = make_child (savestring ("push"), 0); + if (pid == -1) + { + builtin_error ("cannot fork: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + else if (pid == 0) + { + /* Shell variable adjustments: $SHLVL, $$, $PPID, $! */ + adjust_shell_level (1); + dollar_dollar_pid = getpid (); + set_ppid (); + + /* Clean up job control stuff. */ + stop_making_children (); + cleanup_the_pipeline (); + delete_all_jobs (0); + + last_asynchronous_pid = NO_PID; + + /* Make sure the job control code has the right values for + the shell's process group and tty process group, and that + the signals are set correctly for job control. */ + initialize_job_control (0); + initialize_job_signals (); + + /* And read commands until exit. */ + reader_loop (); + exit_shell (last_command_exit_value); + } + else + { + stop_pipeline (0, (COMMAND *)NULL); + xstatus = wait_for (pid, 0); + return (xstatus); + } +} + +char *push_doc[] = { + "Create child shell.", + "", + "Create a child that is an exact duplicate of the running shell", + "and wait for it to exit. The $SHLVL, $!, $$, and $PPID variables", + "are adjusted in the child. The return value is the exit status", + "of the child.", + (char *)NULL +}; + +struct builtin push_struct = { + "push", + push_builtin, + BUILTIN_ENABLED, + push_doc, + "push", + 0 +}; diff --git a/examples/loadables/realpath.c b/examples/loadables/realpath.c new file mode 100644 index 0000000..ef83671 --- /dev/null +++ b/examples/loadables/realpath.c @@ -0,0 +1,207 @@ +/* + * realpath -- canonicalize pathnames, resolving symlinks + * + * usage: realpath [-cqsv] [-a name] pathname [pathname...] + * + * options: -a name assign each canonicalized pathname to indexed array + * variable NAME + * -c check whether or not each resolved path exists + * -q no output, exit status determines whether path is valid + * -s strip . and .. from the pathname only, no symlink resolution + * -v produce verbose output + * + * + * exit status: 0 if all pathnames resolved + * 1 if any of the pathname arguments could not be resolved + * + * + * Bash loadable builtin version + * + * Chet Ramey + * chet@po.cwru.edu + */ + +/* + Copyright (C) 1999-2009,2021,2022 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include <sys/types.h> +#include <sys/stat.h> + +#include <stdio.h> +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif +#include "bashansi.h" +#include <maxpath.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#ifndef errno +extern int errno; +#endif + +extern char *sh_realpath(); + +int +realpath_builtin(WORD_LIST *list) +{ + int opt, cflag, vflag, qflag, sflag, aflag, es; + char *r, realbuf[PATH_MAX], *p, *newpath; + struct stat sb; +#if defined (ARRAY_VARS) + arrayind_t ind; + char *aname; + SHELL_VAR *v; +#endif + + if (list == 0) { + builtin_usage(); + return (EX_USAGE); + } + + vflag = cflag = qflag = aflag = sflag = 0; +#if defined (ARRAY_VARS) + aname = NULL; + v = NULL; + ind = 0; +#endif + reset_internal_getopt(); + while ((opt = internal_getopt (list, "a:cqsv")) != -1) { + switch (opt) { +#if defined (ARRAY_VARS) + case 'a': + aflag = 1; + aname = list_optarg; + break; +#endif + case 'c': + cflag = 1; + break; + case 'q': + qflag = 1; + break; + case 's': + sflag = 1; + break; + case 'v': + vflag = 1; + break; + CASE_HELPOPT; + default: + builtin_usage(); + return (EX_USAGE); + } + } + + list = loptend; + + if (list == 0) { + builtin_usage(); + return (EX_USAGE); + } + +#if defined (ARRAY_VARS) + if (aflag && legal_identifier (aname) == 0) { + sh_invalidid(aname); + return (EXECUTION_FAILURE); + } + if (aname && builtin_unbind_variable (aname) == -2) + return (EXECUTION_FAILURE); + if (aname) { + v = find_or_make_array_variable (aname, 1); + if (v == 0 || readonly_p (v) || noassign_p (v)) { + if (v && readonly_p (v)) + err_readonly (aname); + return (EXECUTION_FAILURE); + } else if (array_p (v) == 0) { + builtin_error ("%s: not an indexed array", aname); + return (EXECUTION_FAILURE); + } + if (invisible_p (v)) + VUNSETATTR (v, att_invisible); + array_flush (array_cell (v)); + } +#endif + + for (es = EXECUTION_SUCCESS; list; list = list->next) { + p = list->word->word; + if (sflag) { + /* sh_canonpath doesn't convert to absolute pathnames */ + newpath = make_absolute(p, get_string_value("PWD")); + r = sh_canonpath(newpath, PATH_CHECKDOTDOT|PATH_CHECKEXISTS); + free(newpath); + } else + r = sh_realpath(p, realbuf); + if (r == 0) { + es = EXECUTION_FAILURE; + if (qflag == 0) + builtin_error("%s: cannot resolve: %s", p, strerror(errno)); + continue; + } + if (cflag && (stat(r, &sb) < 0)) { + es = EXECUTION_FAILURE; + if (qflag == 0) + builtin_error("%s: %s", p, strerror(errno)); + continue; + } + if (aflag) { + bind_array_element (v, ind, r, 0); + ind++; + } + if (qflag == 0) { + if (vflag) + printf ("%s -> ", p); + printf("%s\n", r); + } + if (sflag) + free (r); + } + return es; +} + +char *realpath_doc[] = { + "Display pathname in canonical form.", + "", + "Display the canonicalized version of each PATHNAME argument, resolving", + "symbolic links.", + "The -a option stores each canonicalized PATHNAME argument into the indexed", + "array VARNAME.", + "The -c option checks whether or not each resolved name exists.", + "The -q option produces no output; the exit status determines the", + "validity of each PATHNAME, but any array assignment is still performed.", + "If the -s option is supplied, canonicalize . and .. pathname components", + "without resolving symbolic links.", + "The -v option produces verbose output.", + "The exit status is 0 if each PATHNAME was resolved; non-zero otherwise.", + (char *)NULL +}; + +struct builtin realpath_struct = { + "realpath", /* builtin name */ + realpath_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + realpath_doc, /* array of long documentation strings */ + "realpath [-a varname] [-cqsv] pathname [pathname...]", /* usage synopsis */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/rm.c b/examples/loadables/rm.c new file mode 100644 index 0000000..d8d1522 --- /dev/null +++ b/examples/loadables/rm.c @@ -0,0 +1,185 @@ +/* rm - remove files and directories with -r */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 2016 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include <stdio.h> +#include <errno.h> +#include <dirent.h> +#include "builtins.h" +#include "shell.h" +#include "common.h" +#include "bashgetopt.h" + +#if !defined (errno) +extern int errno; +#endif + +static int rm_file(const char *fname); + +static int force, recursive; + +static int +_remove_directory(const char *dirname) +{ + DIR *dir; + struct dirent *dp; + size_t dirlen; + int err; + + dirlen = strlen (dirname); + err = 0; + + if ((dir = opendir(dirname))) + { + while ((dp = readdir(dir))) + { +#ifdef __GNUC__ + char fname[dirlen + 1 + strlen (dp->d_name) + 1]; +#else + char *fname; + int fnsize; +#endif + + QUIT; + if (*dp->d_name == '.' && (dp->d_name[1] == 0 || (dp->d_name[1] == '.' && dp->d_name[2] == 0))) + continue; + +#ifdef __GNUC__ + snprintf(fname, sizeof (fname), "%s/%s", dirname, dp->d_name); +#else + fnsize = dirlen + 1 + strlen (dp->d_name) + 1; + fname = xmalloc (fnsize); + snprintf(fname, fnsize, "%s/%s", dirname, dp->d_name); +#endif + + if (rm_file (fname) && force == 0) + err = 1; +#ifndef __GNUC__ + free (fname); +#endif + QUIT; + } + + closedir(dir); + + if (err == 0 && rmdir (dirname) && force == 0) + err = 1; + } + else if (force == 0) + err = 1; + + if (err) + builtin_error ("%s: %s", dirname, strerror (errno)); + + return err; +} + +static int +rm_file(const char *fname) +{ + if (unlink (fname) == 0) + return 0; + + QUIT; + /* If FNAME is a directory glibc returns EISDIR but correct POSIX value + would be EPERM. If we get that error and FNAME is a directory and -r + was supplied, recursively remove the directory and its contents */ + if ((errno == EISDIR || errno == EPERM) && recursive && file_isdir (fname)) + return _remove_directory(fname); + else if (force) + return 0; + + builtin_error ("%s: %s", fname, strerror (errno)); + return 1; +} + +int +rm_builtin (list) + WORD_LIST *list; +{ + const char *name; + WORD_LIST *l; + int rval, opt; + + recursive = force = 0; + rval = EXECUTION_SUCCESS; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "Rrfi")) != -1) + { + switch (opt) + { + case 'R': + case 'r': + recursive = 1; + break; + case 'f': + force = 1; + break; + case 'i': + return (EX_DISKFALLBACK); + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) + { + if (force == 0) + { + builtin_usage (); + return (EXECUTION_FAILURE); + } + return (EXECUTION_SUCCESS); + } + + for (l = list; l; l = l->next) + { + QUIT; + if (rm_file(l->word->word) && force == 0) + rval = EXECUTION_FAILURE; + } + + return rval; +} + +char *rm_doc[] = { + "Remove files.", + "", + "rm removes the files specified as arguments.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin rm_struct = { + "rm", /* builtin name */ + rm_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + rm_doc, /* array of long documentation strings. */ + "rm [-rf] file ...", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/rmdir.c b/examples/loadables/rmdir.c new file mode 100644 index 0000000..001c2bd --- /dev/null +++ b/examples/loadables/rmdir.c @@ -0,0 +1,72 @@ +/* rmdir - remove directory */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include <stdio.h> +#include <errno.h> +#include "builtins.h" +#include "shell.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +int +rmdir_builtin (list) + WORD_LIST *list; +{ + int rval; + WORD_LIST *l; + + if (no_options (list)) + return (EX_USAGE); + + for (rval = EXECUTION_SUCCESS, l = list; l; l = l->next) + if (rmdir (l->word->word) < 0) + { + builtin_error ("%s: %s", l->word->word, strerror (errno)); + rval = EXECUTION_FAILURE; + } + + return rval; +} + +char *rmdir_doc[] = { + "Remove directory.", + "", + "rmdir removes the directory entry specified by each argument,", + "provided the directory is empty.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin rmdir_struct = { + "rmdir", /* builtin name */ + rmdir_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + rmdir_doc, /* array of long documentation strings. */ + "rmdir directory ...", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/seq.c b/examples/loadables/seq.c new file mode 100644 index 0000000..f8eec5b --- /dev/null +++ b/examples/loadables/seq.c @@ -0,0 +1,502 @@ +/* seq - print sequence of numbers to standard output. + Copyright (C) 2018-2020 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +/* Written as bash builtin by Chet Ramey. Portions from seq.c by Ulrich Drepper. */ + +#include <config.h> + +#include <sys/types.h> + +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif + +#include <stdio.h> +#include <errno.h> + +#include "bashansi.h" +#include "loadables.h" +#include "bashintl.h" + +#ifndef errno +extern int errno; +#endif + +#if defined (PRI_MACROS_BROKEN) +# undef PRIdMAX +#endif + +#if !defined (PRIdMAX) +# if HAVE_LONG_LONG +# define PRIdMAX "lld" +# else +# define PRIdMAX "ld" +# endif +#endif + +#if defined (HAVE_LONG_DOUBLE) && HAVE_DECL_STRTOLD && !defined(STRTOLD_BROKEN) +typedef long double floatmax_t; +# define FLOATMAX_CONV "L" +# define strtofltmax strtold +# define FLOATMAX_FMT "%Lg" +# define FLOATMAX_WFMT "%0.Lf" +# define USE_LONG_DOUBLE +#else +typedef double floatmax_t; +# define FLOATMAX_CONV "" +# define strtofltmax strtod +# define FLOATMAX_FMT "%g" +# define FLOATMAX_WFMT "%0.f" +#endif +static floatmax_t getfloatmax PARAMS((const char *)); +static char *genformat PARAMS((floatmax_t, floatmax_t, floatmax_t)); + +#define MAX(a, b) (((a) < (b))? (b) : (a)) + +static int conversion_error = 0; + +/* If true print all number with equal width. */ +static int equal_width; + +/* The string used to separate two numbers. */ +static char const *separator; + +/* The string output after all numbers have been output. */ +static char const terminator[] = "\n"; + +static char decimal_point; + +/* Pretty much the same as the version in builtins/printf.def */ +static floatmax_t +getfloatmax (arg) + const char *arg; +{ + floatmax_t ret; + char *ep; + + errno = 0; + ret = strtofltmax (arg, &ep); + + if (*ep) + { + sh_invalidnum ((char *)arg); + conversion_error = 1; + } + else if (errno == ERANGE) + { + builtin_error ("warning: %s: %s", arg, strerror(ERANGE)); + conversion_error = 1; + } + + if (ret == -0.0) + ret = 0.0; + + return (ret); +} + +/* If FORMAT is a valid printf format for a double argument, return + its long double equivalent, allocated from dynamic storage. This + was written by Ulrich Drepper, taken from coreutils:seq.c */ +static char * +long_double_format (char const *fmt) +{ + size_t i; + size_t length_modifier_offset; + int has_L; + + for (i = 0; ! (fmt[i] == '%' && fmt[i + 1] != '%'); i += (fmt[i] == '%') + 1) + { + if (!fmt[i]) + { + builtin_error ("format %s has no %% directive", fmt); + return 0; + } + } + + i++; + i += strspn (fmt + i, "-+#0 '"); /* zero or more flags */ + i += strspn (fmt + i, "0123456789"); /* optional minimum field width */ + if (fmt[i] == '.') /* optional precision */ + { + i++; + i += strspn (fmt + i, "0123456789"); + } + + length_modifier_offset = i; /* optional length modifier */ + /* we could ignore an 'l' length modifier here */ + has_L = (fmt[i] == 'L'); + i += has_L; + switch (fmt[i]) + { + case '\0': + builtin_error ("format %s ends in %%", fmt); + return 0; + case 'A': + case 'a': + case 'e': + case 'E': + case 'f': + case 'F': + case 'g': + case 'G': + break; + default: + builtin_error ("format %s has unknown `%%%c' directive", fmt, fmt[i]); + return 0; + } + for (i++; ; i += (fmt[i] == '%') + 1) + if (fmt[i] == '%' && fmt[i + 1] != '%') + { + builtin_error ("format %s has too many %% directives", fmt); + return 0; + } + else if (fmt[i] == 0) + { + size_t format_size = i + 1; + char *ldfmt = xmalloc (format_size + 1); + memcpy (ldfmt, fmt, length_modifier_offset); +#ifdef USE_LONG_DOUBLE + ldfmt[length_modifier_offset] = 'L'; + strcpy (ldfmt + length_modifier_offset + 1, + fmt + length_modifier_offset + has_L); +#else + strcpy (ldfmt + length_modifier_offset, fmt + length_modifier_offset); +#endif + return ldfmt; + } +} + +/* Return the number of digits following the decimal point in NUMBUF */ +static int +getprec (numbuf) + const char *numbuf; +{ + int p; + char *dp; + + if (dp = strchr (numbuf, decimal_point)) + dp++; /* skip over decimal point */ + for (p = 0; dp && *dp && ISDIGIT (*dp); dp++) + p++; + return p; +} + +/* Return the default format given FIRST, INCR, and LAST. */ +static char * +genformat (first, incr, last) + floatmax_t first, incr, last; +{ + static char buf[6 + 2 * INT_STRLEN_BOUND (int)]; + int wfirst, wlast, width; + int iprec, fprec, lprec, prec; + + if (equal_width == 0) + return (FLOATMAX_FMT); + + /* OK, we have to figure out the largest number of decimal places. This is + a little more expensive than using the original strings. */ + snprintf (buf, sizeof (buf), FLOATMAX_FMT, incr); + iprec = getprec (buf); + + wfirst = snprintf (buf, sizeof (buf), FLOATMAX_FMT, first); + fprec = getprec (buf); + + prec = MAX (fprec, iprec); + + wlast = snprintf (buf, sizeof (buf), FLOATMAX_FMT, last); + lprec = getprec (buf); + + /* increase first width by any increased precision in increment */ + wfirst += (prec - fprec); + + /* adjust last width to use precision from first/incr */ + wlast += (prec - lprec); + + if (lprec && prec == 0) + wlast--; /* no decimal point */ + if (lprec == 0 && prec) + wlast++; /* include decimal point */ + if (fprec == 0 && prec) + wfirst++; /* include decimal point */ + + width = MAX (wfirst, wlast); + if (width) + sprintf (buf, "%%0%d.%d%sf", width, prec, FLOATMAX_CONV); + else + sprintf (buf, "%%.%d%sf", prec, FLOATMAX_CONV); + + return buf; +} + +int +print_fltseq (fmt, first, last, incr) + const char *fmt; + floatmax_t first, last, incr; +{ + int n; + floatmax_t next; + const char *s; + + n = 0; /* iteration counter */ + s = ""; + for (next = first; incr >= 0 ? (next <= last) : (next >= last); next = first + n * incr) + { + QUIT; + if (*s && fputs (s, stdout) == EOF) + return (sh_chkwrite (EXECUTION_FAILURE)); + if (printf (fmt, next) < 0) + return (sh_chkwrite (EXECUTION_FAILURE)); + s = separator; + n++; + } + + if (n > 0 && fputs (terminator, stdout) == EOF) + return (sh_chkwrite (EXECUTION_FAILURE)); + return (sh_chkwrite (EXECUTION_SUCCESS)); +} + +/* must be <= INT_STRLEN_BOUND(intmax_t) */ +int +width_needed (num) + intmax_t num; +{ + int ret; + + ret = num < 0; /* sign */ + if (ret) + num = -num; + do + ret++; + while (num /= 10); + return ret; +} + +int +print_intseq (ifirst, ilast, iincr) + intmax_t ifirst, ilast, iincr; +{ + char intwfmt[6 + INT_STRLEN_BOUND(int) + sizeof (PRIdMAX)]; + const char *s; + intmax_t i, next; + + /* compute integer format string */ + if (equal_width) /* -w supplied */ + { + int wfirst, wlast, width; + + wfirst = width_needed (ifirst); + wlast = width_needed (ilast); + width = MAX(wfirst, wlast); + + /* The leading %s is for the separator */ + snprintf (intwfmt, sizeof (intwfmt), "%%s%%0%u" PRIdMAX, width); + } + + /* We could use braces.c:mkseq here but that allocates lots of memory */ + s = ""; + for (i = ifirst; (ifirst <= ilast) ? (i <= ilast) : (i >= ilast); i = next) + { + QUIT; + /* The leading %s is for the separator */ + if (printf (equal_width ? intwfmt : "%s%" PRIdMAX, s, i) < 0) + return (sh_chkwrite (EXECUTION_FAILURE)); + s = separator; + next = i + iincr; + } + + if (fputs (terminator, stdout) == EOF) + return (sh_chkwrite (EXECUTION_FAILURE)); + return (sh_chkwrite (EXECUTION_SUCCESS)); +} + +int +seq_builtin (list) + WORD_LIST *list; +{ + floatmax_t first, last, incr; + intmax_t ifirst, ilast, iincr; + WORD_LIST *l; + int opt, nargs, intseq, freefmt; + char *first_str, *incr_str, *last_str; + char const *fmtstr; /* The printf(3) format used for output. */ + + equal_width = 0; + separator = "\n"; + fmtstr = NULL; + + first = 1.0; + last = 0.0; + incr = 0.0; /* set later */ + ifirst = ilast = iincr = 0; + first_str = incr_str = last_str = 0; + + intseq = freefmt = 0; + opt = 0; + + reset_internal_getopt (); + while (opt != -1) + { + l = lcurrent ? lcurrent : list; + if (l && l->word && l->word->word && l->word->word[0] == '-' && + (l->word->word[1] == '.' || DIGIT (l->word->word[1]))) + { + loptend = l; + break; /* negative number */ + } + if ((opt = internal_getopt (list, "f:s:w")) == -1) + break; + + switch (opt) + { + case 'f': + fmtstr = list_optarg; + break; + case 's': + separator = list_optarg; + break; + case 'w': + equal_width = 1; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) + { + builtin_usage (); + return (EXECUTION_FAILURE); + } + + for (nargs = 1, l = list; l->next; l = l->next) + nargs++; + if (nargs > 3) + { + builtin_usage (); + return (EXECUTION_FAILURE); + } + + /* LAST */ + conversion_error = 0; + last = getfloatmax (last_str = l->word->word); + if (conversion_error) + return (EXECUTION_FAILURE); + + /* FIRST LAST */ + if (nargs > 1) + { + conversion_error = 0; + first = getfloatmax (first_str = list->word->word); + if (conversion_error) + return (EXECUTION_FAILURE); + } + + /* FIRST INCR LAST */ + if (nargs > 2) + { + conversion_error = 0; + incr = getfloatmax (incr_str = list->next->word->word); + if (conversion_error) + return (EXECUTION_FAILURE); + if (incr == 0.0) + { + builtin_error ("zero %screment", (first < last) ? "in" : "de"); + return (EXECUTION_FAILURE); + } + } + + /* Sanitize arguments */ + if (incr == 0.0) + incr = (first <= last) ? 1.0 : -1.0; + if ((incr < 0.0 && first < last) || (incr > 0 && first > last)) + { + builtin_error ("incorrect %screment", (first < last) ? "in" : "de"); + return (EXECUTION_FAILURE); + } + + /* validate format here */ + if (fmtstr) + { + fmtstr = long_double_format (fmtstr); + freefmt = 1; + if (fmtstr == 0) + return (EXECUTION_FAILURE); + } + + if (fmtstr != NULL && equal_width) + { + builtin_warning ("-w ignored when the format string is specified"); + equal_width = 0; + } + + /* Placeholder for later additional conditions */ + if (last_str && all_digits (last_str) && + (first_str == 0 || all_digits (first_str)) && + (incr_str == 0 || all_digits (incr_str)) && + fmtstr == NULL) + intseq = 1; + + if (intseq) + { + ifirst = (intmax_t)first; /* truncation */ + ilast = (intmax_t)last; + iincr = (intmax_t)incr; + + return (print_intseq (ifirst, ilast, iincr)); + } + + decimal_point = locale_decpoint (); + if (fmtstr == NULL) + fmtstr = genformat (first, incr, last); + + print_fltseq (fmtstr, first, last, incr); + + if (freefmt) + free ((void *)fmtstr); + return sh_chkwrite (EXECUTION_SUCCESS); +} + +/* Taken largely from GNU seq. */ +char *seq_doc[] = { + "Print numbers from FIRST to LAST, in steps of INCREMENT.", + "", + "-f FORMAT use printf style floating-point FORMAT", + "-s STRING use STRING to separate numbers (default: \\n)", + "-w equalize width by padding with leading zeroes", + "", + "If FIRST or INCREMENT is omitted, it defaults to 1. However, an", + "omitted INCREMENT defaults to -1 when LAST is smaller than FIRST.", + "The sequence of numbers ends when the sum of the current number and", + "INCREMENT would become greater than LAST.", + "FIRST, INCREMENT, and LAST are interpreted as floating point values.", + "", + "FORMAT must be suitable for printing one argument of type 'double';", + "it defaults to %.PRECf if FIRST, INCREMENT, and LAST are all fixed point", + "decimal numbers with maximum precision PREC, and to %g otherwise.", + (char *)NULL +}; + +struct builtin seq_struct = { + "seq", + seq_builtin, + BUILTIN_ENABLED, + seq_doc, + "seq [-f format] [-s separator] [-w] [FIRST [INCR]] LAST", + 0 +}; diff --git a/examples/loadables/setpgid.c b/examples/loadables/setpgid.c new file mode 100644 index 0000000..e56fd51 --- /dev/null +++ b/examples/loadables/setpgid.c @@ -0,0 +1,121 @@ +/* setpgid.c: bash loadable wrapper for setpgid system call + + An example of how to wrap a system call with a loadable builtin. + + Originally contributed by Jason Vas Dias <jason.vas.dias@gmail.com> + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include <errno.h> +#include <string.h> + +#include "bashtypes.h" +#include "posixtime.h" + +#include <stdio.h> + +#include "builtins.h" +#include "shell.h" +#include "common.h" + +#include "bashgetopt.h" + +#if !defined (_POSIX_VERSION) +# define setpgid(pid, pgrp) setpgrp (pid, pgrp) +#endif + +int +setpgid_builtin (list) + WORD_LIST *list; +{ + register WORD_LIST *wl; + intmax_t pid_arg, pgid_arg; + pid_t pid, pgid; + char *pidstr, *pgidstr; + + wl = list; + pid = pgid = 0; + + if (wl == 0 || wl->next == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + pidstr = wl->word ? wl->word->word : 0; + pgidstr = wl->next->word ? wl->next->word->word : 0; + + if (pidstr == 0 || pgidstr == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + if (legal_number (pidstr, &pid_arg) == 0) + { + builtin_error ("%s: pid argument must be numeric", pidstr); + return (EXECUTION_FAILURE); + } + if (pid_arg < 0) + { + builtin_error("%s: negative pid values not allowed", pidstr); + return (EXECUTION_FAILURE); + } + pid = pid_arg; + + if (legal_number (pgidstr, &pgid_arg) == 0) + { + builtin_error ("%s: pgrp argument must be numeric", pgidstr); + return (EXECUTION_FAILURE); + } + if (pgid_arg < 0) + { + builtin_error ("%s: negative pgrp values not allowed", pgidstr); + return (EXECUTION_FAILURE); + } + pgid = pgid_arg; + + errno = 0; + if (setpgid(pid, pgid) < 0) + { + builtin_error("setpgid failed: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } + return (EXECUTION_SUCCESS); +} + +const char *setpgid_doc[] = { + "invoke the setpgid(2) system call", + "", + "Arguments:", + " pid : numeric process identifier, >= 0", + " pgrpid: numeric process group identifier, >=0", + "See the setpgid(2) manual page.", + (const char *)NULL +}; + +struct builtin setpgid_struct = { + "setpgid", + setpgid_builtin, + BUILTIN_ENABLED, + (char **)setpgid_doc, + "setpgid pid pgrpid", + 0 +}; diff --git a/examples/loadables/sleep.c b/examples/loadables/sleep.c new file mode 100644 index 0000000..204601f --- /dev/null +++ b/examples/loadables/sleep.c @@ -0,0 +1,179 @@ +/* + * sleep -- sleep for fractions of a second + * + * usage: sleep seconds[.fraction] + * + * as an extension, we support the GNU time interval format (2m20s) + */ + +/* + Copyright (C) 1999-2021 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include "bashtypes.h" + +#if defined (TIME_WITH_SYS_TIME) +# include <sys/time.h> +# include <time.h> +#else +# if defined (HAVE_SYS_TIME_H) +# include <sys/time.h> +# else +# include <time.h> +# endif +#endif + +#if defined (HAVE_UNISTD_H) +#include <unistd.h> +#endif + +#include <stdio.h> +#include "chartypes.h" + +#include "loadables.h" + +#define S_SEC 1 +#define S_MIN (60*S_SEC) +#define S_HOUR (60*S_MIN) +#define S_DAY (24*S_HOUR) + +static int +parse_gnutimefmt (char *string, long *sp, long *up) +{ + int c, r; + char *s, *ep; + long tsec, tusec, accumsec, accumusec, t; + int mult; + + tsec = tusec = 0; + accumsec = accumusec = 0; + mult = 1; + + for (s = string; s && *s; s++) { + r = uconvert(s, &accumsec, &accumusec, &ep); + if (r == 0 && *ep == 0) + return r; + c = *ep; + mult = 1; + switch (c) { + case '\0': + case 's': + mult = S_SEC; + break; + case 'm': + mult = S_MIN; + break; + case 'h': + mult = S_HOUR; + break; + case 'd': + mult = S_DAY; + break; + default: + return 0; + } + + /* multiply the accumulated value by the multiplier */ + t = accumusec * mult; + accumsec = accumsec * mult + (t / 1000000); + accumusec = t % 1000000; + + /* add to running total */ + tsec += accumsec; + tusec += accumusec; + if (tusec >= 1000000) { + tsec++; + tusec -= 1000000; + } + + /* reset and continue */ + accumsec = accumusec = 0; + mult = 1; + if (c == 0) + break; + s = ep; + } + + if (sp) + *sp = tsec; + if (up) + *up = tusec; + + return 1; +} + +int +sleep_builtin (WORD_LIST *list) +{ + long sec, usec; + char *ep; + int r, mul; + time_t t; + + if (list == 0) { + builtin_usage(); + return(EX_USAGE); + } + + /* Skip over `--' */ + if (list->word && ISOPTION (list->word->word, '-')) + list = list->next; + + if (*list->word->word == '-' || list->next) { + builtin_usage (); + return (EX_USAGE); + } + + r = uconvert(list->word->word, &sec, &usec, &ep); + /* + * Maybe postprocess conversion failures here based on EP + * + * A heuristic: if the conversion failed, but the argument appears to + * contain a GNU-like interval specifier (e.g. "1m30s"), try to parse + * it. If we can't, return the right exit code to tell + * execute_builtin to try and execute a disk command instead. + */ + if (r == 0 && (strchr ("dhms", *ep) || strpbrk (list->word->word, "dhms"))) + r = parse_gnutimefmt (list->word->word, &sec, &usec); + + if (r) { + fsleep(sec, usec); + QUIT; + return(EXECUTION_SUCCESS); + } + builtin_error("%s: bad sleep interval", list->word->word); + return (EXECUTION_FAILURE); +} + +static char *sleep_doc[] = { + "Suspend execution for specified period.", + "" + "sleep suspends execution for a minimum of SECONDS[.FRACTION] seconds.", + "As an extension, sleep accepts GNU-style time intervals (e.g., 2m30s).", + (char *)NULL +}; + +struct builtin sleep_struct = { + "sleep", + sleep_builtin, + BUILTIN_ENABLED, + sleep_doc, + "sleep seconds[.fraction]", + 0 +}; diff --git a/examples/loadables/stat.c b/examples/loadables/stat.c new file mode 100644 index 0000000..1e60e7b --- /dev/null +++ b/examples/loadables/stat.c @@ -0,0 +1,464 @@ +/* stat - load up an associative array with stat information about a file */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 2016,2022 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <stdio.h> + +#include <sys/types.h> +#include "posixstat.h" +#include <stdio.h> +#include <pwd.h> +#include <grp.h> +#include <errno.h> +#include "posixtime.h" + +#include "bashansi.h" +#include "shell.h" +#include "builtins.h" +#include "common.h" +#include "bashgetopt.h" + +#ifndef errno +extern int errno; +#endif + +#define ST_NAME 0 +#define ST_DEV 1 +#define ST_INO 2 +#define ST_MODE 3 +#define ST_NLINK 4 +#define ST_UID 5 +#define ST_GID 6 +#define ST_RDEV 7 +#define ST_SIZE 8 +#define ST_ATIME 9 +#define ST_MTIME 10 +#define ST_CTIME 11 +#define ST_BLKSIZE 12 +#define ST_BLOCKS 13 +#define ST_CHASELINK 14 +#define ST_PERMS 15 + +#define ST_END 16 + +static char *arraysubs[] = + { + "name", "device", "inode", "type", "nlink", "uid", "gid", "rdev", + "size", "atime", "mtime", "ctime", "blksize", "blocks", "link", "perms", + 0 + }; + +#define DEFTIMEFMT "%a %b %e %k:%M:%S %Z %Y" +#ifndef TIMELEN_MAX +# define TIMELEN_MAX 128 +#endif + +static char *stattime (time_t, const char *); + +static int +getstat (fname, flags, sp) + const char *fname; + int flags; + struct stat *sp; +{ + intmax_t lfd; + int fd, r; + + if (strncmp (fname, "/dev/fd/", 8) == 0) + { + if ((legal_number(fname + 8, &lfd) == 0) || (int)lfd != lfd) + { + errno = EINVAL; + return -1; + } + fd = lfd; + r = fstat(fd, sp); + } +#ifdef HAVE_LSTAT + else if (flags & 1) + r = lstat(fname, sp); +#endif + else + r = stat(fname, sp); + + return r; +} + +static char * +statlink (fname, sp) + char *fname; + struct stat *sp; +{ +#if defined (HAVE_READLINK) + char linkbuf[PATH_MAX]; + int n; + + if (fname && S_ISLNK (sp->st_mode) && (n = readlink (fname, linkbuf, PATH_MAX)) > 0) + { + linkbuf[n] = '\0'; + return (savestring (linkbuf)); + } + else +#endif + return (savestring (fname)); +} + +static char * +octalperms (m) + int m; +{ + int operms; + char *ret; + + operms = 0; + + if (m & S_IRUSR) + operms |= 0400; + if (m & S_IWUSR) + operms |= 0200; + if (m & S_IXUSR) + operms |= 0100; + + if (m & S_IRGRP) + operms |= 0040; + if (m & S_IWGRP) + operms |= 0020; + if (m & S_IXGRP) + operms |= 0010; + + if (m & S_IROTH) + operms |= 0004; + if (m & S_IWOTH) + operms |= 0002; + if (m & S_IXOTH) + operms |= 0001; + + if (m & S_ISUID) + operms |= 04000; + if (m & S_ISGID) + operms |= 02000; + if (m & S_ISVTX) + operms |= 01000; + + ret = (char *)xmalloc (16); + snprintf (ret, 16, "%04o", operms); + return ret; +} + +static char * +statperms (m) + int m; +{ + char ubits[4], gbits[4], obits[4]; /* u=rwx,g=rwx,o=rwx */ + int i; + char *ret; + + i = 0; + if (m & S_IRUSR) + ubits[i++] = 'r'; + if (m & S_IWUSR) + ubits[i++] = 'w'; + if (m & S_IXUSR) + ubits[i++] = 'x'; + ubits[i] = '\0'; + + i = 0; + if (m & S_IRGRP) + gbits[i++] = 'r'; + if (m & S_IWGRP) + gbits[i++] = 'w'; + if (m & S_IXGRP) + gbits[i++] = 'x'; + gbits[i] = '\0'; + + i = 0; + if (m & S_IROTH) + obits[i++] = 'r'; + if (m & S_IWOTH) + obits[i++] = 'w'; + if (m & S_IXOTH) + obits[i++] = 'x'; + obits[i] = '\0'; + + if (m & S_ISUID) + ubits[2] = (m & S_IXUSR) ? 's' : 'S'; + if (m & S_ISGID) + gbits[2] = (m & S_IXGRP) ? 's' : 'S'; + if (m & S_ISVTX) + obits[2] = (m & S_IXOTH) ? 't' : 'T'; + + ret = (char *)xmalloc (32); + snprintf (ret, 32, "u=%s,g=%s,o=%s", ubits, gbits, obits); + return ret; +} + +static char * +statmode(mode) + int mode; +{ + char *modestr, *m; + + modestr = m = (char *)xmalloc (8); + if (S_ISBLK (mode)) + *m++ = 'b'; + if (S_ISCHR (mode)) + *m++ = 'c'; + if (S_ISDIR (mode)) + *m++ = 'd'; + if (S_ISREG(mode)) + *m++ = '-'; + if (S_ISFIFO(mode)) + *m++ = 'p'; + if (S_ISLNK(mode)) + *m++ = 'l'; + if (S_ISSOCK(mode)) + *m++ = 's'; + +#ifdef S_ISDOOR + if (S_ISDOOR (mode)) + *m++ = 'D'; +#endif +#ifdef S_ISWHT + if (S_ISWHT(mode)) + *m++ = 'W'; +#endif +#ifdef S_ISNWK + if (S_ISNWK(mode)) + *m++ = 'n'; +#endif +#ifdef S_ISMPC + if (S_ISMPC (mode)) + *m++ = 'm'; +#endif + + *m = '\0'; + return (modestr); +} + +static char * +stattime (t, timefmt) + time_t t; + const char *timefmt; +{ + char *tbuf, *ret; + const char *fmt; + size_t tlen; + struct tm *tm; + + fmt = timefmt ? timefmt : DEFTIMEFMT; + tm = localtime (&t); + + ret = xmalloc (TIMELEN_MAX); + + tlen = strftime (ret, TIMELEN_MAX, fmt, tm); + if (tlen == 0) + tlen = strftime (ret, TIMELEN_MAX, DEFTIMEFMT, tm); + + return ret; +} + +static char * +statval (which, fname, flags, fmt, sp) + int which; + char *fname; + int flags; + char *fmt; + struct stat *sp; +{ + int temp; + + switch (which) + { + case ST_NAME: + return savestring (fname); + case ST_DEV: + return itos (sp->st_dev); + case ST_INO: + return itos (sp->st_ino); + case ST_MODE: + return (statmode (sp->st_mode)); + case ST_NLINK: + return itos (sp->st_nlink); + case ST_UID: + return itos (sp->st_uid); + case ST_GID: + return itos (sp->st_gid); + case ST_RDEV: + return itos (sp->st_rdev); + case ST_SIZE: + return itos (sp->st_size); + case ST_ATIME: + return ((flags & 2) ? stattime (sp->st_atime, fmt) : itos (sp->st_atime)); + case ST_MTIME: + return ((flags & 2) ? stattime (sp->st_mtime, fmt) : itos (sp->st_mtime)); + case ST_CTIME: + return ((flags & 2) ? stattime (sp->st_ctime, fmt) : itos (sp->st_ctime)); + case ST_BLKSIZE: + return itos (sp->st_blksize); + case ST_BLOCKS: + return itos (sp->st_blocks); + case ST_CHASELINK: + return (statlink (fname, sp)); + case ST_PERMS: + temp = sp->st_mode & (S_IRWXU|S_IRWXG|S_IRWXO|S_ISUID|S_ISGID); + return (flags & 2) ? statperms (temp) : octalperms (temp); + default: + return savestring ("42"); + } +} + +static int +loadstat (vname, var, fname, flags, fmt, sp) + char *vname; + SHELL_VAR *var; + char *fname; + int flags; + char *fmt; + struct stat *sp; +{ + int i; + char *key, *value; + SHELL_VAR *v; + + for (i = 0; arraysubs[i]; i++) + { + key = savestring (arraysubs[i]); + value = statval (i, fname, flags, fmt, sp); + v = bind_assoc_variable (var, vname, key, value, ASS_FORCE); + } + return 0; +} + +int +stat_builtin (list) + WORD_LIST *list; +{ + int opt, flags; + char *aname, *fname, *timefmt; + struct stat st; + SHELL_VAR *v; + + aname = "STAT"; + flags = 0; + timefmt = 0; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "A:F:Ll")) != -1) + { + switch (opt) + { + case 'A': + aname = list_optarg; + break; + case 'L': + flags |= 1; /* operate on links rather than resolving them */ + break; + case 'l': + flags |= 2; + break; + case 'F': + timefmt = list_optarg; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + + if (legal_identifier (aname) == 0) + { + sh_invalidid (aname); + return (EXECUTION_FAILURE); + } + + list = loptend; + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + +#if 0 + unbind_variable (aname); +#endif + fname = list->word->word; + + if (getstat (fname, flags, &st) < 0) + { + builtin_error ("%s: cannot stat: %s", fname, strerror (errno)); + return (EXECUTION_FAILURE); + } + + v = find_or_make_array_variable (aname, 3); + if (v == 0) + { + builtin_error ("%s: cannot create variable", aname); + return (EXECUTION_FAILURE); + } + if (loadstat (aname, v, fname, flags, timefmt, &st) < 0) + { + builtin_error ("%s: cannot assign file status information", aname); + unbind_variable (aname); + return (EXECUTION_FAILURE); + } + + return (EXECUTION_SUCCESS); +} + +/* An array of strings forming the `long' documentation for a builtin xxx, + which is printed by `help xxx'. It must end with a NULL. By convention, + the first line is a short description. */ +char *stat_doc[] = { + "Load an associative array with file status information.", + "", + "Take a filename and load the status information returned by a", + "stat(2) call on that file into the associative array specified", + "by the -A option. The default array name is STAT.", + "", + "If the -L option is supplied, stat does not resolve symbolic links", + "and reports information about the link itself. The -l option results", + "in longer-form listings for some of the fields. When -l is used,", + "the -F option supplies a format string passed to strftime(3) to", + "display the file time information.", + "The exit status is 0 unless the stat fails or assigning the array", + "is unsuccessful.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. The flags must include BUILTIN_ENABLED so the + builtin can be used. */ +struct builtin stat_struct = { + "stat", /* builtin name */ + stat_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + stat_doc, /* array of long documentation strings. */ + "stat [-lL] [-A aname] file", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/strftime.c b/examples/loadables/strftime.c new file mode 100644 index 0000000..f4e194e --- /dev/null +++ b/examples/loadables/strftime.c @@ -0,0 +1,128 @@ +/* strftime - loadable builtin interface to strftime(3) */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "bashtypes.h" +#include "posixtime.h" + +#include <stdio.h> + +#include "builtins.h" +#include "shell.h" +#include "common.h" +#include "bashgetopt.h" + +int +strftime_builtin (list) + WORD_LIST *list; +{ + char *format, *tbuf; + size_t tbsize, tsize; + time_t secs; + struct tm *t; + int n; + intmax_t i; + + if (no_options (list)) + return (EX_USAGE); + list = loptend; + + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + format = list->word->word; + if (format == 0 || *format == 0) + { + printf ("\n"); + return (EXECUTION_SUCCESS); + } + + list = list->next; + + if (list && list->word->word) + { + n = legal_number (list->word->word, &i); + if (n == 0 || i < 0 || i != (time_t)i) + { + sh_invalidnum (list->word->word); + return (EXECUTION_FAILURE); + } + else + secs = i; + } + else + secs = NOW; + + t = localtime (&secs); + + tbsize = strlen (format) * 4; + tbuf = 0; + + /* Now try to figure out how big the buffer should really be. strftime(3) + will return the number of bytes placed in the buffer unless it's greater + than MAXSIZE, in which case it returns 0. */ + for (n = 1; n <= 8; n++) + { + tbuf = xrealloc (tbuf, tbsize * n); + tsize = strftime (tbuf, tbsize * n, format, t); + if (tsize) + break; + } + + if (tsize) + printf ("%s\n", tbuf); + free (tbuf); + + return (EXECUTION_SUCCESS); +} + +/* An array of strings forming the `long' documentation for a builtin xxx, + which is printed by `help xxx'. It must end with a NULL. */ +char *strftime_doc[] = { + "Display formatted time.", + "", + "Converts date and time format to a string and displays it on the", + "standard output. If the optional second argument is supplied, it", + "is used as the number of seconds since the epoch to use in the", + "conversion, otherwise the current time is used.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. The flags must include BUILTIN_ENABLED so the + builtin can be used. */ +struct builtin strftime_struct = { + "strftime", /* builtin name */ + strftime_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + strftime_doc, /* array of long documentation strings. */ + "strftime format [seconds]", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/sync.c b/examples/loadables/sync.c new file mode 100644 index 0000000..4fbeee1 --- /dev/null +++ b/examples/loadables/sync.c @@ -0,0 +1,53 @@ +/* sync - sync the disks by forcing pending filesystem writes to complete */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" + +int +sync_builtin (list) + WORD_LIST *list; +{ + sync(); + return (EXECUTION_SUCCESS); +} + +char *sync_doc[] = { + "Sync disks.", + "" + "Force completion of pending disk writes", + (char *)NULL +}; + +struct builtin sync_struct = { + "sync", /* builtin name */ + sync_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + sync_doc, /* array of long documentation strings. */ + "sync", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/tee.c b/examples/loadables/tee.c new file mode 100644 index 0000000..0365aa9 --- /dev/null +++ b/examples/loadables/tee.c @@ -0,0 +1,183 @@ +/* tee - duplicate standard input */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2021 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include "bashtypes.h" +#include "posixstat.h" +#include "filecntl.h" + +#include <signal.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include "bashansi.h" + +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#if !defined (errno) +extern int errno; +#endif + +typedef struct flist { + struct flist *next; + int fd; + char *fname; +} FLIST; + +static FLIST *tee_flist; + +#define TEE_BUFSIZE 8192 + +extern int interrupt_immediately; + +extern char *strerror (); + +int +tee_builtin (list) + WORD_LIST *list; +{ + int opt, append, nointr, rval, fd, fflags; + int n, nr, nw; + FLIST *fl; + char *buf, *bp; + + char *t; + + reset_internal_getopt (); + append = nointr = 0; + tee_flist = (FLIST *)NULL; + while ((opt = internal_getopt (list, "ai")) != -1) + { + switch (opt) + { + case 'a': + append = 1; + break; + case 'i': + nointr = 1; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (nointr == 0) + interrupt_immediately++; + + buf = xmalloc (TEE_BUFSIZE); + + /* Initialize output file list. */ + fl = tee_flist = (FLIST *)xmalloc (sizeof(FLIST)); + tee_flist->fd = 1; + tee_flist->fname = "stdout"; + tee_flist->next = (FLIST *)NULL; + + /* Add file arguments to list of output files. */ + fflags = append ? O_WRONLY|O_CREAT|O_APPEND : O_WRONLY|O_CREAT|O_TRUNC; + for (rval = EXECUTION_SUCCESS; list; list = list->next) + { + fd = open (list->word->word, fflags, 0666); + if (fd < 0) + { + builtin_error ("%s: cannot open: %s", list->word->word, strerror (errno)); + rval = EXECUTION_FAILURE; + } + else + { + fl->next = (FLIST *)xmalloc (sizeof(FLIST)); + fl->next->fd = fd; + fl->next->fname = list->word->word; + fl = fl->next; + fl->next = (FLIST *)NULL; + } + QUIT; + } + + while ((nr = read(0, buf, TEE_BUFSIZE)) > 0) + for (fl = tee_flist; fl; fl = fl->next) + { + n = nr; + bp = buf; + do + { + if ((nw = write (fl->fd, bp, n)) == -1) + { + builtin_error ("%s: write error: %s", fl->fname, strerror (errno)); + rval = EXECUTION_FAILURE; + break; + } + bp += nw; + QUIT; + } + while (n -= nw); + } + if (nr < 0) + builtin_error ("read error: %s", strerror (errno)); + + /* Deallocate resources -- this is a builtin command. */ + tee_flist = tee_flist->next; /* skip bogus close of stdout */ + while (tee_flist) + { + fl = tee_flist; + if (close (fl->fd) < 0) + { + builtin_error ("%s: close_error: %s", fl->fname, strerror (errno)); + rval = EXECUTION_FAILURE; + } + tee_flist = tee_flist->next; + free (fl); + } + + QUIT; + return (rval); +} + +char *tee_doc[] = { + "Duplicate standard output.", + "", + "Copy standard input to standard output, making a copy in each", + "filename argument. If the `-a' option is given, the specified", + "files are appended to, otherwise they are overwritten. If the", + "`-i' option is supplied, tee ignores interrupts.", + (char *)NULL +}; + +struct builtin tee_struct = { + "tee", /* builtin name */ + tee_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + tee_doc, /* array of long documentation strings. */ + "tee [-ai] [file ...]", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/template.c b/examples/loadables/template.c new file mode 100644 index 0000000..094b80c --- /dev/null +++ b/examples/loadables/template.c @@ -0,0 +1,75 @@ +/* template - example template for loadable builtin */ + +/* See Makefile for compilation details. */ + +#include <config.h> + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif +#include "bashansi.h" +#include <stdio.h> +#include <errno.h> + +#include "loadables.h" + +#if !defined (errno) +extern int errno; +#endif + +extern char *strerror (); + +int +template_builtin (list) + WORD_LIST *list; +{ + int opt, rval; + + rval = EXECUTION_SUCCESS; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "")) != -1) + { + switch (opt) + { + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + return (rval); +} + +/* Called when `template' is enabled and loaded from the shared object. If this + function returns 0, the load fails. */ +int +template_builtin_load (name) + char *name; +{ + return (1); +} + +/* Called when `template' is disabled. */ +void +template_builtin_unload (name) + char *name; +{ +} + +char *template_doc[] = { + "Short description.", + "" + "Longer description of builtin and usage.", + (char *)NULL +}; + +struct builtin template_struct = { + "template", /* builtin name */ + template_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + template_doc, /* array of long documentation strings. */ + "template", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/truefalse.c b/examples/loadables/truefalse.c new file mode 100644 index 0000000..e011fa1 --- /dev/null +++ b/examples/loadables/truefalse.c @@ -0,0 +1,72 @@ +/* true and false builtins */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#include "bashtypes.h" +#include "shell.h" +#include "builtins.h" +#include "common.h" + +int +true_builtin (list) + WORD_LIST *list; +{ + return EXECUTION_SUCCESS; +} + +int +false_builtin (list) + WORD_LIST *list; +{ + return EXECUTION_FAILURE; +} + +static char *true_doc[] = { + "Exit successfully.", + "", + "Return a successful result.", + (char *)NULL +}; + +static char *false_doc[] = { + "Exit unsuccessfully.", + "", + "Return an unsuccessful result.", + (char *)NULL +}; + +struct builtin true_struct = { + "true", + true_builtin, + BUILTIN_ENABLED, + true_doc, + "true", + 0 +}; + +struct builtin false_struct = { + "false", + false_builtin, + BUILTIN_ENABLED, + false_doc, + "false", + 0 +}; diff --git a/examples/loadables/tty.c b/examples/loadables/tty.c new file mode 100644 index 0000000..381df25 --- /dev/null +++ b/examples/loadables/tty.c @@ -0,0 +1,83 @@ +/* tty - return terminal name */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 1999-2021 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include <stdio.h> +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +extern char *ttyname (); + +int +tty_builtin (list) + WORD_LIST *list; +{ + int opt, sflag; + char *t; + + reset_internal_getopt (); + sflag = 0; + while ((opt = internal_getopt (list, "s")) != -1) + { + switch (opt) + { + case 's': + sflag = 1; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + t = ttyname (0); + QUIT; + if (sflag == 0) + puts (t ? t : "not a tty"); + return (t ? EXECUTION_SUCCESS : EXECUTION_FAILURE); +} + +char *tty_doc[] = { + "Display terminal name.", + "", + "tty writes the name of the terminal that is opened for standard", + "input to standard output. If the `-s' option is supplied, nothing", + "is written; the exit status determines whether or not the standard", + "input is connected to a tty.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin tty_struct = { + "tty", /* builtin name */ + tty_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + tty_doc, /* array of long documentation strings. */ + "tty [-s]", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/uname.c b/examples/loadables/uname.c new file mode 100644 index 0000000..106a1c8 --- /dev/null +++ b/examples/loadables/uname.c @@ -0,0 +1,162 @@ +/* + * uname - print system information + * + * usage: uname [-amnrsv] + * + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <stdio.h> + +#include "bashtypes.h" + +#if defined (HAVE_UNAME) +# include <sys/utsname.h> +#else +struct utsname { + char sysname[32]; + char nodename[32]; + char release[32]; + char version[32]; + char machine[32]; +}; +#endif + +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +#define FLAG_SYSNAME 0x01 /* -s */ +#define FLAG_NODENAME 0x02 /* -n */ +#define FLAG_RELEASE 0x04 /* -r */ +#define FLAG_VERSION 0x08 /* -v */ +#define FLAG_MACHINE 0x10 /* -m, -p */ + +#define FLAG_ALL 0x1f + +#ifndef errno +extern int errno; +#endif + +static void uprint(); + +static int uname_flags; + +int +uname_builtin (list) + WORD_LIST *list; +{ + int opt, r; + struct utsname uninfo; + + uname_flags = 0; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "amnprsv")) != -1) + { + switch (opt) + { + case 'a': + uname_flags |= FLAG_ALL; + break; + case 'm': + case 'p': + uname_flags |= FLAG_MACHINE; + break; + case 'n': + uname_flags |= FLAG_NODENAME; + break; + case 'r': + uname_flags |= FLAG_RELEASE; + break; + case 's': + uname_flags |= FLAG_SYSNAME; + break; + case 'v': + uname_flags |= FLAG_VERSION; + break; + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list) + { + builtin_usage (); + return (EX_USAGE); + } + + if (uname_flags == 0) + uname_flags = FLAG_SYSNAME; + + /* Only ancient systems will not have uname(2). */ +#ifdef HAVE_UNAME + if (uname (&uninfo) < 0) + { + builtin_error ("cannot get system name: %s", strerror (errno)); + return (EXECUTION_FAILURE); + } +#else + builtin_error ("cannot get system information: uname(2) not available"); + return (EXECUTION_FAILURE); +#endif + + uprint (FLAG_SYSNAME, uninfo.sysname); + uprint (FLAG_NODENAME, uninfo.nodename); + uprint (FLAG_RELEASE, uninfo.release); + uprint (FLAG_VERSION, uninfo.version); + uprint (FLAG_MACHINE, uninfo.machine); + + return (EXECUTION_SUCCESS); +} + +static void +uprint (flag, info) + int flag; + char *info; +{ + if (uname_flags & flag) + { + uname_flags &= ~flag; + printf ("%s%c", info, uname_flags ? ' ' : '\n'); + } +} + +char *uname_doc[] = { + "Display system information.", + "", + "Display information about the system hardware and OS.", + (char *)NULL +}; + +struct builtin uname_struct = { + "uname", + uname_builtin, + BUILTIN_ENABLED, + uname_doc, + "uname [-amnrsv]", + 0 +}; diff --git a/examples/loadables/unlink.c b/examples/loadables/unlink.c new file mode 100644 index 0000000..ff2a78a --- /dev/null +++ b/examples/loadables/unlink.c @@ -0,0 +1,74 @@ +/* unlink - remove a directory entry */ + +/* Should only be used to remove directories by a superuser prepared to let + fsck clean up the file system. */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include <stdio.h> +#include <errno.h> + +#include "builtins.h" +#include "shell.h" +#include "common.h" + +#ifndef errno +extern int errno; +#endif + +int +unlink_builtin (list) + WORD_LIST *list; +{ + if (list == 0) + { + builtin_usage (); + return (EX_USAGE); + } + + if (unlink (list->word->word) != 0) + { + builtin_error ("%s: cannot unlink: %s", list->word->word, strerror (errno)); + return (EXECUTION_FAILURE); + } + + return (EXECUTION_SUCCESS); +} + +char *unlink_doc[] = { + "Remove a directory entry.", + "", + "Forcibly remove a directory entry, even if it's a directory.", + (char *)NULL +}; + +struct builtin unlink_struct = { + "unlink", /* builtin name */ + unlink_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + unlink_doc, /* array of long documentation strings. */ + "unlink name", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; diff --git a/examples/loadables/whoami.c b/examples/loadables/whoami.c new file mode 100644 index 0000000..3e7e36e --- /dev/null +++ b/examples/loadables/whoami.c @@ -0,0 +1,75 @@ +/* + * whoami - print out username of current user + */ + +/* + Copyright (C) 1999-2009 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include <config.h> +#include <stdio.h> + +#include "builtins.h" +#include "shell.h" +#include "bashgetopt.h" +#include "common.h" + +int +whoami_builtin (list) + WORD_LIST *list; +{ + int opt; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "")) != -1) + { + switch (opt) + { + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + if (list) + { + builtin_usage (); + return (EX_USAGE); + } + + if (current_user.user_name == 0) + get_current_user_info (); + printf ("%s\n", current_user.user_name); + return (EXECUTION_SUCCESS); +} + +char *whoami_doc[] = { + "Print user name", + "", + "Display name of current user.", + (char *)NULL +}; + +struct builtin whoami_struct = { + "whoami", + whoami_builtin, + BUILTIN_ENABLED, + whoami_doc, + "whoami", + 0 +}; |