rc

[fork] interactive rc shell
Log | Files | Refs | README | LICENSE

commit cc11e3c80f687fb98dcbcd2249731f999ddb9189
parent 2ab8e78dfa862d4a378f766548442c24efa516cc
Author: Toby Goodwin <toby@paccrat.org>
Date:   Thu, 25 Aug 2016 22:09:42 +0100

do not return random value if sigaction fails (thanks @borkovic)

Diffstat:
M.gitignore | 13+++++++++++--
Dacconfig.h | 83-------------------------------------------------------------------------------
Daclocal.m4 | 1069-------------------------------------------------------------------------------
Msignal.c | 5+++--
4 files changed, 14 insertions(+), 1156 deletions(-)

diff --git a/.gitignore b/.gitignore @@ -1,14 +1,23 @@ *~ -.deps/ -Makefile autom4te.cache/ +compile config.h +config.h.in config.log config.status configure depcomp +.deps/ +install-sh +Makefile +Makefile.in missing +mksignal +mkstatval +*.o +rc sigmsgs.c sigmsgs.h stamp-h1 statval.h +tripping diff --git a/acconfig.h b/acconfig.h @@ -1,83 +0,0 @@ -/* Define to a suitable ssize_t. */ -#undef ssize_t - -/* Define to a suitable sig_atomic_t. */ -#undef sig_atomic_t - -/* Define if you want rc to hand off exec errors to (e.g.) /bin/sh. */ -#undef DEFAULTINTERP - -/* Define to the default path used if $PATH is empty when rc starts. */ -#undef DEFAULTPATH - -/* Define if your kernel has SysV special SIGCLD semantics. */ -#undef HAVE_SYSV_SIGCLD - -/* Define if your kernel supports `#!' magic numbers. */ -#undef HASH_BANG - -/* Define if you have /dev/fd. */ -#undef HAVE_DEV_FD - -/* Define if you have /proc/self/fd. */ -#undef HAVE_PROC_SELF_FD - -/* Define if you have named pipes. */ -#undef HAVE_FIFO - -/* Define if quad_t is a native type. */ -#undef HAVE_QUAD_T - -/* Define if you have rlim_t. */ -#undef HAVE_RLIM_T - -/* Define if you have sigsetjmp(). */ -#undef HAVE_SIGSETJMP - -/* Define in you have strerror(). */ -#undef HAVE_STRERROR - -/* Define if you want rc to encode strange characters in the environment. */ -#undef PROTECT_ENV - -/* Define if you have extra builtins. */ -#undef RC_ADDON - -/* Define if you want echo as a builtin. */ -#undef RC_ECHO - -/* Define if you want rc to support broken apps, like a job control shell. */ -#undef RC_JOB - -/* Define if you want to use editline. */ -#undef EDITLINE - -/* Define if you want to use GNU readline. */ -#undef READLINE - -/* Define if you have the older readline, with rl_deprep_terminal. */ -#undef READLINE_OLD - -/* Define if RLIMIT_foo defines need _KERNEL. */ -#undef RLIMIT_NEEDS_KERNEL - -/* Define if rlim_t is quad_t. */ -#undef RLIM_T_IS_QUAD_T - -/* Define to package name. */ -#undef PACKAGE - -/* Define to version. */ -#undef VERSION - -/* Define to release date. */ -#undef RELDATE - -/* Define if you have SA_INTERRUPT (and sigaction()). */ -#undef HAVE_SA_INTERRUPT - -/* Define if you have POSIX getgroups(). */ -#undef HAVE_POSIX_GETGROUPS - -/* Define if you have va_copy(). */ -#undef HAVE_VA_COPY diff --git a/aclocal.m4 b/aclocal.m4 @@ -1,1069 +0,0 @@ -# generated automatically by aclocal 1.13.4 -*- Autoconf -*- - -# Copyright (C) 1996-2013 Free Software Foundation, Inc. - -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY, to the extent permitted by law; without -# even the implied warranty of MERCHANTABILITY or FITNESS FOR A -# PARTICULAR PURPOSE. - -m4_ifndef([AC_CONFIG_MACRO_DIRS], [m4_defun([_AM_CONFIG_MACRO_DIRS], [])m4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])]) -m4_ifndef([AC_AUTOCONF_VERSION], - [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl -m4_if(m4_defn([AC_AUTOCONF_VERSION]), [2.69],, -[m4_warning([this file was generated for autoconf 2.69. -You have another version of autoconf. It may work, but is not guaranteed to. -If you have problems, you may need to regenerate the build system entirely. -To do so, use the procedure documented by the package, typically 'autoreconf'.])]) - -# Copyright (C) 2002-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_AUTOMAKE_VERSION(VERSION) -# ---------------------------- -# Automake X.Y traces this macro to ensure aclocal.m4 has been -# generated from the m4 files accompanying Automake X.Y. -# (This private macro should not be called outside this file.) -AC_DEFUN([AM_AUTOMAKE_VERSION], -[am__api_version='1.13' -dnl Some users find AM_AUTOMAKE_VERSION and mistake it for a way to -dnl require some minimum version. Point them to the right macro. -m4_if([$1], [1.13.4], [], - [AC_FATAL([Do not call $0, use AM_INIT_AUTOMAKE([$1]).])])dnl -]) - -# _AM_AUTOCONF_VERSION(VERSION) -# ----------------------------- -# aclocal traces this macro to find the Autoconf version. -# This is a private macro too. Using m4_define simplifies -# the logic in aclocal, which can simply ignore this definition. -m4_define([_AM_AUTOCONF_VERSION], []) - -# AM_SET_CURRENT_AUTOMAKE_VERSION -# ------------------------------- -# Call AM_AUTOMAKE_VERSION and AM_AUTOMAKE_VERSION so they can be traced. -# This function is AC_REQUIREd by AM_INIT_AUTOMAKE. -AC_DEFUN([AM_SET_CURRENT_AUTOMAKE_VERSION], -[AM_AUTOMAKE_VERSION([1.13.4])dnl -m4_ifndef([AC_AUTOCONF_VERSION], - [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl -_AM_AUTOCONF_VERSION(m4_defn([AC_AUTOCONF_VERSION]))]) - -# AM_AUX_DIR_EXPAND -*- Autoconf -*- - -# Copyright (C) 2001-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets -# $ac_aux_dir to '$srcdir/foo'. In other projects, it is set to -# '$srcdir', '$srcdir/..', or '$srcdir/../..'. -# -# Of course, Automake must honor this variable whenever it calls a -# tool from the auxiliary directory. The problem is that $srcdir (and -# therefore $ac_aux_dir as well) can be either absolute or relative, -# depending on how configure is run. This is pretty annoying, since -# it makes $ac_aux_dir quite unusable in subdirectories: in the top -# source directory, any form will work fine, but in subdirectories a -# relative path needs to be adjusted first. -# -# $ac_aux_dir/missing -# fails when called from a subdirectory if $ac_aux_dir is relative -# $top_srcdir/$ac_aux_dir/missing -# fails if $ac_aux_dir is absolute, -# fails when called from a subdirectory in a VPATH build with -# a relative $ac_aux_dir -# -# The reason of the latter failure is that $top_srcdir and $ac_aux_dir -# are both prefixed by $srcdir. In an in-source build this is usually -# harmless because $srcdir is '.', but things will broke when you -# start a VPATH build or use an absolute $srcdir. -# -# So we could use something similar to $top_srcdir/$ac_aux_dir/missing, -# iff we strip the leading $srcdir from $ac_aux_dir. That would be: -# am_aux_dir='\$(top_srcdir)/'`expr "$ac_aux_dir" : "$srcdir//*\(.*\)"` -# and then we would define $MISSING as -# MISSING="\${SHELL} $am_aux_dir/missing" -# This will work as long as MISSING is not called from configure, because -# unfortunately $(top_srcdir) has no meaning in configure. -# However there are other variables, like CC, which are often used in -# configure, and could therefore not use this "fixed" $ac_aux_dir. -# -# Another solution, used here, is to always expand $ac_aux_dir to an -# absolute PATH. The drawback is that using absolute paths prevent a -# configured tree to be moved without reconfiguration. - -AC_DEFUN([AM_AUX_DIR_EXPAND], -[dnl Rely on autoconf to set up CDPATH properly. -AC_PREREQ([2.50])dnl -# expand $ac_aux_dir to an absolute path -am_aux_dir=`cd $ac_aux_dir && pwd` -]) - -# AM_CONDITIONAL -*- Autoconf -*- - -# Copyright (C) 1997-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_CONDITIONAL(NAME, SHELL-CONDITION) -# ------------------------------------- -# Define a conditional. -AC_DEFUN([AM_CONDITIONAL], -[AC_PREREQ([2.52])dnl - m4_if([$1], [TRUE], [AC_FATAL([$0: invalid condition: $1])], - [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl -AC_SUBST([$1_TRUE])dnl -AC_SUBST([$1_FALSE])dnl -_AM_SUBST_NOTMAKE([$1_TRUE])dnl -_AM_SUBST_NOTMAKE([$1_FALSE])dnl -m4_define([_AM_COND_VALUE_$1], [$2])dnl -if $2; then - $1_TRUE= - $1_FALSE='#' -else - $1_TRUE='#' - $1_FALSE= -fi -AC_CONFIG_COMMANDS_PRE( -[if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then - AC_MSG_ERROR([[conditional "$1" was never defined. -Usually this means the macro was only invoked conditionally.]]) -fi])]) - -# Copyright (C) 1999-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - - -# There are a few dirty hacks below to avoid letting 'AC_PROG_CC' be -# written in clear, in which case automake, when reading aclocal.m4, -# will think it sees a *use*, and therefore will trigger all it's -# C support machinery. Also note that it means that autoscan, seeing -# CC etc. in the Makefile, will ask for an AC_PROG_CC use... - - -# _AM_DEPENDENCIES(NAME) -# ---------------------- -# See how the compiler implements dependency checking. -# NAME is "CC", "CXX", "OBJC", "OBJCXX", "UPC", or "GJC". -# We try a few techniques and use that to set a single cache variable. -# -# We don't AC_REQUIRE the corresponding AC_PROG_CC since the latter was -# modified to invoke _AM_DEPENDENCIES(CC); we would have a circular -# dependency, and given that the user is not expected to run this macro, -# just rely on AC_PROG_CC. -AC_DEFUN([_AM_DEPENDENCIES], -[AC_REQUIRE([AM_SET_DEPDIR])dnl -AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl -AC_REQUIRE([AM_MAKE_INCLUDE])dnl -AC_REQUIRE([AM_DEP_TRACK])dnl - -m4_if([$1], [CC], [depcc="$CC" am_compiler_list=], - [$1], [CXX], [depcc="$CXX" am_compiler_list=], - [$1], [OBJC], [depcc="$OBJC" am_compiler_list='gcc3 gcc'], - [$1], [OBJCXX], [depcc="$OBJCXX" am_compiler_list='gcc3 gcc'], - [$1], [UPC], [depcc="$UPC" am_compiler_list=], - [$1], [GCJ], [depcc="$GCJ" am_compiler_list='gcc3 gcc'], - [depcc="$$1" am_compiler_list=]) - -AC_CACHE_CHECK([dependency style of $depcc], - [am_cv_$1_dependencies_compiler_type], -[if test -z "$AMDEP_TRUE" && test -f "$am_depcomp"; then - # We make a subdir and do the tests there. Otherwise we can end up - # making bogus files that we don't know about and never remove. For - # instance it was reported that on HP-UX the gcc test will end up - # making a dummy file named 'D' -- because '-MD' means "put the output - # in D". - rm -rf conftest.dir - mkdir conftest.dir - # Copy depcomp to subdir because otherwise we won't find it if we're - # using a relative directory. - cp "$am_depcomp" conftest.dir - cd conftest.dir - # We will build objects and dependencies in a subdirectory because - # it helps to detect inapplicable dependency modes. For instance - # both Tru64's cc and ICC support -MD to output dependencies as a - # side effect of compilation, but ICC will put the dependencies in - # the current directory while Tru64 will put them in the object - # directory. - mkdir sub - - am_cv_$1_dependencies_compiler_type=none - if test "$am_compiler_list" = ""; then - am_compiler_list=`sed -n ['s/^#*\([a-zA-Z0-9]*\))$/\1/p'] < ./depcomp` - fi - am__universal=false - m4_case([$1], [CC], - [case " $depcc " in #( - *\ -arch\ *\ -arch\ *) am__universal=true ;; - esac], - [CXX], - [case " $depcc " in #( - *\ -arch\ *\ -arch\ *) am__universal=true ;; - esac]) - - for depmode in $am_compiler_list; do - # Setup a source with many dependencies, because some compilers - # like to wrap large dependency lists on column 80 (with \), and - # we should not choose a depcomp mode which is confused by this. - # - # We need to recreate these files for each test, as the compiler may - # overwrite some of them when testing with obscure command lines. - # This happens at least with the AIX C compiler. - : > sub/conftest.c - for i in 1 2 3 4 5 6; do - echo '#include "conftst'$i'.h"' >> sub/conftest.c - # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with - # Solaris 10 /bin/sh. - echo '/* dummy */' > sub/conftst$i.h - done - echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf - - # We check with '-c' and '-o' for the sake of the "dashmstdout" - # mode. It turns out that the SunPro C++ compiler does not properly - # handle '-M -o', and we need to detect this. Also, some Intel - # versions had trouble with output in subdirs. - am__obj=sub/conftest.${OBJEXT-o} - am__minus_obj="-o $am__obj" - case $depmode in - gcc) - # This depmode causes a compiler race in universal mode. - test "$am__universal" = false || continue - ;; - nosideeffect) - # After this tag, mechanisms are not by side-effect, so they'll - # only be used when explicitly requested. - if test "x$enable_dependency_tracking" = xyes; then - continue - else - break - fi - ;; - msvc7 | msvc7msys | msvisualcpp | msvcmsys) - # This compiler won't grok '-c -o', but also, the minuso test has - # not run yet. These depmodes are late enough in the game, and - # so weak that their functioning should not be impacted. - am__obj=conftest.${OBJEXT-o} - am__minus_obj= - ;; - none) break ;; - esac - if depmode=$depmode \ - source=sub/conftest.c object=$am__obj \ - depfile=sub/conftest.Po tmpdepfile=sub/conftest.TPo \ - $SHELL ./depcomp $depcc -c $am__minus_obj sub/conftest.c \ - >/dev/null 2>conftest.err && - grep sub/conftst1.h sub/conftest.Po > /dev/null 2>&1 && - grep sub/conftst6.h sub/conftest.Po > /dev/null 2>&1 && - grep $am__obj sub/conftest.Po > /dev/null 2>&1 && - ${MAKE-make} -s -f confmf > /dev/null 2>&1; then - # icc doesn't choke on unknown options, it will just issue warnings - # or remarks (even with -Werror). So we grep stderr for any message - # that says an option was ignored or not supported. - # When given -MP, icc 7.0 and 7.1 complain thusly: - # icc: Command line warning: ignoring option '-M'; no argument required - # The diagnosis changed in icc 8.0: - # icc: Command line remark: option '-MP' not supported - if (grep 'ignoring option' conftest.err || - grep 'not supported' conftest.err) >/dev/null 2>&1; then :; else - am_cv_$1_dependencies_compiler_type=$depmode - break - fi - fi - done - - cd .. - rm -rf conftest.dir -else - am_cv_$1_dependencies_compiler_type=none -fi -]) -AC_SUBST([$1DEPMODE], [depmode=$am_cv_$1_dependencies_compiler_type]) -AM_CONDITIONAL([am__fastdep$1], [ - test "x$enable_dependency_tracking" != xno \ - && test "$am_cv_$1_dependencies_compiler_type" = gcc3]) -]) - - -# AM_SET_DEPDIR -# ------------- -# Choose a directory name for dependency files. -# This macro is AC_REQUIREd in _AM_DEPENDENCIES. -AC_DEFUN([AM_SET_DEPDIR], -[AC_REQUIRE([AM_SET_LEADING_DOT])dnl -AC_SUBST([DEPDIR], ["${am__leading_dot}deps"])dnl -]) - - -# AM_DEP_TRACK -# ------------ -AC_DEFUN([AM_DEP_TRACK], -[AC_ARG_ENABLE([dependency-tracking], [dnl -AS_HELP_STRING( - [--enable-dependency-tracking], - [do not reject slow dependency extractors]) -AS_HELP_STRING( - [--disable-dependency-tracking], - [speeds up one-time build])]) -if test "x$enable_dependency_tracking" != xno; then - am_depcomp="$ac_aux_dir/depcomp" - AMDEPBACKSLASH='\' - am__nodep='_no' -fi -AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno]) -AC_SUBST([AMDEPBACKSLASH])dnl -_AM_SUBST_NOTMAKE([AMDEPBACKSLASH])dnl -AC_SUBST([am__nodep])dnl -_AM_SUBST_NOTMAKE([am__nodep])dnl -]) - -# Generate code to set up dependency tracking. -*- Autoconf -*- - -# Copyright (C) 1999-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - - -# _AM_OUTPUT_DEPENDENCY_COMMANDS -# ------------------------------ -AC_DEFUN([_AM_OUTPUT_DEPENDENCY_COMMANDS], -[{ - # Older Autoconf quotes --file arguments for eval, but not when files - # are listed without --file. Let's play safe and only enable the eval - # if we detect the quoting. - case $CONFIG_FILES in - *\'*) eval set x "$CONFIG_FILES" ;; - *) set x $CONFIG_FILES ;; - esac - shift - for mf - do - # Strip MF so we end up with the name of the file. - mf=`echo "$mf" | sed -e 's/:.*$//'` - # Check whether this is an Automake generated Makefile or not. - # We used to match only the files named 'Makefile.in', but - # some people rename them; so instead we look at the file content. - # Grep'ing the first line is not enough: some people post-process - # each Makefile.in and add a new line on top of each file to say so. - # Grep'ing the whole file is not good either: AIX grep has a line - # limit of 2048, but all sed's we know have understand at least 4000. - if sed -n 's,^#.*generated by automake.*,X,p' "$mf" | grep X >/dev/null 2>&1; then - dirpart=`AS_DIRNAME("$mf")` - else - continue - fi - # Extract the definition of DEPDIR, am__include, and am__quote - # from the Makefile without running 'make'. - DEPDIR=`sed -n 's/^DEPDIR = //p' < "$mf"` - test -z "$DEPDIR" && continue - am__include=`sed -n 's/^am__include = //p' < "$mf"` - test -z "$am__include" && continue - am__quote=`sed -n 's/^am__quote = //p' < "$mf"` - # Find all dependency output files, they are included files with - # $(DEPDIR) in their names. We invoke sed twice because it is the - # simplest approach to changing $(DEPDIR) to its actual value in the - # expansion. - for file in `sed -n " - s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \ - sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g'`; do - # Make sure the directory exists. - test -f "$dirpart/$file" && continue - fdir=`AS_DIRNAME(["$file"])` - AS_MKDIR_P([$dirpart/$fdir]) - # echo "creating $dirpart/$file" - echo '# dummy' > "$dirpart/$file" - done - done -} -])# _AM_OUTPUT_DEPENDENCY_COMMANDS - - -# AM_OUTPUT_DEPENDENCY_COMMANDS -# ----------------------------- -# This macro should only be invoked once -- use via AC_REQUIRE. -# -# This code is only required when automatic dependency tracking -# is enabled. FIXME. This creates each '.P' file that we will -# need in order to bootstrap the dependency handling code. -AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS], -[AC_CONFIG_COMMANDS([depfiles], - [test x"$AMDEP_TRUE" != x"" || _AM_OUTPUT_DEPENDENCY_COMMANDS], - [AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"]) -]) - -# Do all the work for Automake. -*- Autoconf -*- - -# Copyright (C) 1996-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# This macro actually does too much. Some checks are only needed if -# your package does certain things. But this isn't really a big deal. - -# AM_INIT_AUTOMAKE(PACKAGE, VERSION, [NO-DEFINE]) -# AM_INIT_AUTOMAKE([OPTIONS]) -# ----------------------------------------------- -# The call with PACKAGE and VERSION arguments is the old style -# call (pre autoconf-2.50), which is being phased out. PACKAGE -# and VERSION should now be passed to AC_INIT and removed from -# the call to AM_INIT_AUTOMAKE. -# We support both call styles for the transition. After -# the next Automake release, Autoconf can make the AC_INIT -# arguments mandatory, and then we can depend on a new Autoconf -# release and drop the old call support. -AC_DEFUN([AM_INIT_AUTOMAKE], -[AC_PREREQ([2.65])dnl -dnl Autoconf wants to disallow AM_ names. We explicitly allow -dnl the ones we care about. -m4_pattern_allow([^AM_[A-Z]+FLAGS$])dnl -AC_REQUIRE([AM_SET_CURRENT_AUTOMAKE_VERSION])dnl -AC_REQUIRE([AC_PROG_INSTALL])dnl -if test "`cd $srcdir && pwd`" != "`pwd`"; then - # Use -I$(srcdir) only when $(srcdir) != ., so that make's output - # is not polluted with repeated "-I." - AC_SUBST([am__isrc], [' -I$(srcdir)'])_AM_SUBST_NOTMAKE([am__isrc])dnl - # test to see if srcdir already configured - if test -f $srcdir/config.status; then - AC_MSG_ERROR([source directory already configured; run "make distclean" there first]) - fi -fi - -# test whether we have cygpath -if test -z "$CYGPATH_W"; then - if (cygpath --version) >/dev/null 2>/dev/null; then - CYGPATH_W='cygpath -w' - else - CYGPATH_W=echo - fi -fi -AC_SUBST([CYGPATH_W]) - -# Define the identity of the package. -dnl Distinguish between old-style and new-style calls. -m4_ifval([$2], -[AC_DIAGNOSE([obsolete], - [$0: two- and three-arguments forms are deprecated.]) -m4_ifval([$3], [_AM_SET_OPTION([no-define])])dnl - AC_SUBST([PACKAGE], [$1])dnl - AC_SUBST([VERSION], [$2])], -[_AM_SET_OPTIONS([$1])dnl -dnl Diagnose old-style AC_INIT with new-style AM_AUTOMAKE_INIT. -m4_if( - m4_ifdef([AC_PACKAGE_NAME], [ok]):m4_ifdef([AC_PACKAGE_VERSION], [ok]), - [ok:ok],, - [m4_fatal([AC_INIT should be called with package and version arguments])])dnl - AC_SUBST([PACKAGE], ['AC_PACKAGE_TARNAME'])dnl - AC_SUBST([VERSION], ['AC_PACKAGE_VERSION'])])dnl - -_AM_IF_OPTION([no-define],, -[AC_DEFINE_UNQUOTED([PACKAGE], ["$PACKAGE"], [Name of package]) - AC_DEFINE_UNQUOTED([VERSION], ["$VERSION"], [Version number of package])])dnl - -# Some tools Automake needs. -AC_REQUIRE([AM_SANITY_CHECK])dnl -AC_REQUIRE([AC_ARG_PROGRAM])dnl -AM_MISSING_PROG([ACLOCAL], [aclocal-${am__api_version}]) -AM_MISSING_PROG([AUTOCONF], [autoconf]) -AM_MISSING_PROG([AUTOMAKE], [automake-${am__api_version}]) -AM_MISSING_PROG([AUTOHEADER], [autoheader]) -AM_MISSING_PROG([MAKEINFO], [makeinfo]) -AC_REQUIRE([AM_PROG_INSTALL_SH])dnl -AC_REQUIRE([AM_PROG_INSTALL_STRIP])dnl -AC_REQUIRE([AC_PROG_MKDIR_P])dnl -# For better backward compatibility. To be removed once Automake 1.9.x -# dies out for good. For more background, see: -# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html> -# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html> -AC_SUBST([mkdir_p], ['$(MKDIR_P)']) -# We need awk for the "check" target. The system "awk" is bad on -# some platforms. -AC_REQUIRE([AC_PROG_AWK])dnl -AC_REQUIRE([AC_PROG_MAKE_SET])dnl -AC_REQUIRE([AM_SET_LEADING_DOT])dnl -_AM_IF_OPTION([tar-ustar], [_AM_PROG_TAR([ustar])], - [_AM_IF_OPTION([tar-pax], [_AM_PROG_TAR([pax])], - [_AM_PROG_TAR([v7])])]) -_AM_IF_OPTION([no-dependencies],, -[AC_PROVIDE_IFELSE([AC_PROG_CC], - [_AM_DEPENDENCIES([CC])], - [m4_define([AC_PROG_CC], - m4_defn([AC_PROG_CC])[_AM_DEPENDENCIES([CC])])])dnl -AC_PROVIDE_IFELSE([AC_PROG_CXX], - [_AM_DEPENDENCIES([CXX])], - [m4_define([AC_PROG_CXX], - m4_defn([AC_PROG_CXX])[_AM_DEPENDENCIES([CXX])])])dnl -AC_PROVIDE_IFELSE([AC_PROG_OBJC], - [_AM_DEPENDENCIES([OBJC])], - [m4_define([AC_PROG_OBJC], - m4_defn([AC_PROG_OBJC])[_AM_DEPENDENCIES([OBJC])])])dnl -AC_PROVIDE_IFELSE([AC_PROG_OBJCXX], - [_AM_DEPENDENCIES([OBJCXX])], - [m4_define([AC_PROG_OBJCXX], - m4_defn([AC_PROG_OBJCXX])[_AM_DEPENDENCIES([OBJCXX])])])dnl -]) -AC_REQUIRE([AM_SILENT_RULES])dnl -dnl The testsuite driver may need to know about EXEEXT, so add the -dnl 'am__EXEEXT' conditional if _AM_COMPILER_EXEEXT was seen. This -dnl macro is hooked onto _AC_COMPILER_EXEEXT early, see below. -AC_CONFIG_COMMANDS_PRE(dnl -[m4_provide_if([_AM_COMPILER_EXEEXT], - [AM_CONDITIONAL([am__EXEEXT], [test -n "$EXEEXT"])])])dnl -]) - -dnl Hook into '_AC_COMPILER_EXEEXT' early to learn its expansion. Do not -dnl add the conditional right here, as _AC_COMPILER_EXEEXT may be further -dnl mangled by Autoconf and run in a shell conditional statement. -m4_define([_AC_COMPILER_EXEEXT], -m4_defn([_AC_COMPILER_EXEEXT])[m4_provide([_AM_COMPILER_EXEEXT])]) - - -# When config.status generates a header, we must update the stamp-h file. -# This file resides in the same directory as the config header -# that is generated. The stamp files are numbered to have different names. - -# Autoconf calls _AC_AM_CONFIG_HEADER_HOOK (when defined) in the -# loop where config.status creates the headers, so we can generate -# our stamp files there. -AC_DEFUN([_AC_AM_CONFIG_HEADER_HOOK], -[# Compute $1's index in $config_headers. -_am_arg=$1 -_am_stamp_count=1 -for _am_header in $config_headers :; do - case $_am_header in - $_am_arg | $_am_arg:* ) - break ;; - * ) - _am_stamp_count=`expr $_am_stamp_count + 1` ;; - esac -done -echo "timestamp for $_am_arg" >`AS_DIRNAME(["$_am_arg"])`/stamp-h[]$_am_stamp_count]) - -# Copyright (C) 2001-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_PROG_INSTALL_SH -# ------------------ -# Define $install_sh. -AC_DEFUN([AM_PROG_INSTALL_SH], -[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl -if test x"${install_sh}" != xset; then - case $am_aux_dir in - *\ * | *\ *) - install_sh="\${SHELL} '$am_aux_dir/install-sh'" ;; - *) - install_sh="\${SHELL} $am_aux_dir/install-sh" - esac -fi -AC_SUBST([install_sh])]) - -# Copyright (C) 2003-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# Check whether the underlying file-system supports filenames -# with a leading dot. For instance MS-DOS doesn't. -AC_DEFUN([AM_SET_LEADING_DOT], -[rm -rf .tst 2>/dev/null -mkdir .tst 2>/dev/null -if test -d .tst; then - am__leading_dot=. -else - am__leading_dot=_ -fi -rmdir .tst 2>/dev/null -AC_SUBST([am__leading_dot])]) - -# Check to see how 'make' treats includes. -*- Autoconf -*- - -# Copyright (C) 2001-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_MAKE_INCLUDE() -# ----------------- -# Check to see how make treats includes. -AC_DEFUN([AM_MAKE_INCLUDE], -[am_make=${MAKE-make} -cat > confinc << 'END' -am__doit: - @echo this is the am__doit target -.PHONY: am__doit -END -# If we don't find an include directive, just comment out the code. -AC_MSG_CHECKING([for style of include used by $am_make]) -am__include="#" -am__quote= -_am_result=none -# First try GNU make style include. -echo "include confinc" > confmf -# Ignore all kinds of additional output from 'make'. -case `$am_make -s -f confmf 2> /dev/null` in #( -*the\ am__doit\ target*) - am__include=include - am__quote= - _am_result=GNU - ;; -esac -# Now try BSD make style include. -if test "$am__include" = "#"; then - echo '.include "confinc"' > confmf - case `$am_make -s -f confmf 2> /dev/null` in #( - *the\ am__doit\ target*) - am__include=.include - am__quote="\"" - _am_result=BSD - ;; - esac -fi -AC_SUBST([am__include]) -AC_SUBST([am__quote]) -AC_MSG_RESULT([$_am_result]) -rm -f confinc confmf -]) - -# Fake the existence of programs that GNU maintainers use. -*- Autoconf -*- - -# Copyright (C) 1997-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_MISSING_PROG(NAME, PROGRAM) -# ------------------------------ -AC_DEFUN([AM_MISSING_PROG], -[AC_REQUIRE([AM_MISSING_HAS_RUN]) -$1=${$1-"${am_missing_run}$2"} -AC_SUBST($1)]) - -# AM_MISSING_HAS_RUN -# ------------------ -# Define MISSING if not defined so far and test if it is modern enough. -# If it is, set am_missing_run to use it, otherwise, to nothing. -AC_DEFUN([AM_MISSING_HAS_RUN], -[AC_REQUIRE([AM_AUX_DIR_EXPAND])dnl -AC_REQUIRE_AUX_FILE([missing])dnl -if test x"${MISSING+set}" != xset; then - case $am_aux_dir in - *\ * | *\ *) - MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;; - *) - MISSING="\${SHELL} $am_aux_dir/missing" ;; - esac -fi -# Use eval to expand $SHELL -if eval "$MISSING --is-lightweight"; then - am_missing_run="$MISSING " -else - am_missing_run= - AC_MSG_WARN(['missing' script is too old or missing]) -fi -]) - -# -*- Autoconf -*- -# Obsolete and "removed" macros, that must however still report explicit -# error messages when used, to smooth transition. -# -# Copyright (C) 1996-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -AC_DEFUN([AM_CONFIG_HEADER], -[AC_DIAGNOSE([obsolete], -['$0': this macro is obsolete. -You should use the 'AC][_CONFIG_HEADERS' macro instead.])dnl -AC_CONFIG_HEADERS($@)]) - -AC_DEFUN([AM_PROG_CC_STDC], -[AC_PROG_CC -am_cv_prog_cc_stdc=$ac_cv_prog_cc_stdc -AC_DIAGNOSE([obsolete], -['$0': this macro is obsolete. -You should simply use the 'AC][_PROG_CC' macro instead. -Also, your code should no longer depend upon 'am_cv_prog_cc_stdc', -but upon 'ac_cv_prog_cc_stdc'.])]) - -AC_DEFUN([AM_C_PROTOTYPES], - [AC_FATAL([automatic de-ANSI-fication support has been removed])]) -AU_DEFUN([fp_C_PROTOTYPES], [AM_C_PROTOTYPES]) - -# Helper functions for option handling. -*- Autoconf -*- - -# Copyright (C) 2001-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# _AM_MANGLE_OPTION(NAME) -# ----------------------- -AC_DEFUN([_AM_MANGLE_OPTION], -[[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])]) - -# _AM_SET_OPTION(NAME) -# -------------------- -# Set option NAME. Presently that only means defining a flag for this option. -AC_DEFUN([_AM_SET_OPTION], -[m4_define(_AM_MANGLE_OPTION([$1]), [1])]) - -# _AM_SET_OPTIONS(OPTIONS) -# ------------------------ -# OPTIONS is a space-separated list of Automake options. -AC_DEFUN([_AM_SET_OPTIONS], -[m4_foreach_w([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])]) - -# _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET]) -# ------------------------------------------- -# Execute IF-SET if OPTION is set, IF-NOT-SET otherwise. -AC_DEFUN([_AM_IF_OPTION], -[m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])]) - -# Check to make sure that the build environment is sane. -*- Autoconf -*- - -# Copyright (C) 1996-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_SANITY_CHECK -# --------------- -AC_DEFUN([AM_SANITY_CHECK], -[AC_MSG_CHECKING([whether build environment is sane]) -# Reject unsafe characters in $srcdir or the absolute working directory -# name. Accept space and tab only in the latter. -am_lf=' -' -case `pwd` in - *[[\\\"\#\$\&\'\`$am_lf]]*) - AC_MSG_ERROR([unsafe absolute working directory name]);; -esac -case $srcdir in - *[[\\\"\#\$\&\'\`$am_lf\ \ ]]*) - AC_MSG_ERROR([unsafe srcdir value: '$srcdir']);; -esac - -# Do 'set' in a subshell so we don't clobber the current shell's -# arguments. Must try -L first in case configure is actually a -# symlink; some systems play weird games with the mod time of symlinks -# (eg FreeBSD returns the mod time of the symlink's containing -# directory). -if ( - am_has_slept=no - for am_try in 1 2; do - echo "timestamp, slept: $am_has_slept" > conftest.file - set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null` - if test "$[*]" = "X"; then - # -L didn't work. - set X `ls -t "$srcdir/configure" conftest.file` - fi - if test "$[*]" != "X $srcdir/configure conftest.file" \ - && test "$[*]" != "X conftest.file $srcdir/configure"; then - - # If neither matched, then we have a broken ls. This can happen - # if, for instance, CONFIG_SHELL is bash and it inherits a - # broken ls alias from the environment. This has actually - # happened. Such a system could not be considered "sane". - AC_MSG_ERROR([ls -t appears to fail. Make sure there is not a broken - alias in your environment]) - fi - if test "$[2]" = conftest.file || test $am_try -eq 2; then - break - fi - # Just in case. - sleep 1 - am_has_slept=yes - done - test "$[2]" = conftest.file - ) -then - # Ok. - : -else - AC_MSG_ERROR([newly created file is older than distributed files! -Check your system clock]) -fi -AC_MSG_RESULT([yes]) -# If we didn't sleep, we still need to ensure time stamps of config.status and -# generated files are strictly newer. -am_sleep_pid= -if grep 'slept: no' conftest.file >/dev/null 2>&1; then - ( sleep 1 ) & - am_sleep_pid=$! -fi -AC_CONFIG_COMMANDS_PRE( - [AC_MSG_CHECKING([that generated files are newer than configure]) - if test -n "$am_sleep_pid"; then - # Hide warnings about reused PIDs. - wait $am_sleep_pid 2>/dev/null - fi - AC_MSG_RESULT([done])]) -rm -f conftest.file -]) - -# Copyright (C) 2009-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_SILENT_RULES([DEFAULT]) -# -------------------------- -# Enable less verbose build rules; with the default set to DEFAULT -# ("yes" being less verbose, "no" or empty being verbose). -AC_DEFUN([AM_SILENT_RULES], -[AC_ARG_ENABLE([silent-rules], [dnl -AS_HELP_STRING( - [--enable-silent-rules], - [less verbose build output (undo: "make V=1")]) -AS_HELP_STRING( - [--disable-silent-rules], - [verbose build output (undo: "make V=0")])dnl -]) -case $enable_silent_rules in @%:@ ((( - yes) AM_DEFAULT_VERBOSITY=0;; - no) AM_DEFAULT_VERBOSITY=1;; - *) AM_DEFAULT_VERBOSITY=m4_if([$1], [yes], [0], [1]);; -esac -dnl -dnl A few 'make' implementations (e.g., NonStop OS and NextStep) -dnl do not support nested variable expansions. -dnl See automake bug#9928 and bug#10237. -am_make=${MAKE-make} -AC_CACHE_CHECK([whether $am_make supports nested variables], - [am_cv_make_support_nested_variables], - [if AS_ECHO([['TRUE=$(BAR$(V)) -BAR0=false -BAR1=true -V=1 -am__doit: - @$(TRUE) -.PHONY: am__doit']]) | $am_make -f - >/dev/null 2>&1; then - am_cv_make_support_nested_variables=yes -else - am_cv_make_support_nested_variables=no -fi]) -if test $am_cv_make_support_nested_variables = yes; then - dnl Using '$V' instead of '$(V)' breaks IRIX make. - AM_V='$(V)' - AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)' -else - AM_V=$AM_DEFAULT_VERBOSITY - AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY -fi -AC_SUBST([AM_V])dnl -AM_SUBST_NOTMAKE([AM_V])dnl -AC_SUBST([AM_DEFAULT_V])dnl -AM_SUBST_NOTMAKE([AM_DEFAULT_V])dnl -AC_SUBST([AM_DEFAULT_VERBOSITY])dnl -AM_BACKSLASH='\' -AC_SUBST([AM_BACKSLASH])dnl -_AM_SUBST_NOTMAKE([AM_BACKSLASH])dnl -]) - -# Copyright (C) 2001-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# AM_PROG_INSTALL_STRIP -# --------------------- -# One issue with vendor 'install' (even GNU) is that you can't -# specify the program used to strip binaries. This is especially -# annoying in cross-compiling environments, where the build's strip -# is unlikely to handle the host's binaries. -# Fortunately install-sh will honor a STRIPPROG variable, so we -# always use install-sh in "make install-strip", and initialize -# STRIPPROG with the value of the STRIP variable (set by the user). -AC_DEFUN([AM_PROG_INSTALL_STRIP], -[AC_REQUIRE([AM_PROG_INSTALL_SH])dnl -# Installed binaries are usually stripped using 'strip' when the user -# run "make install-strip". However 'strip' might not be the right -# tool to use in cross-compilation environments, therefore Automake -# will honor the 'STRIP' environment variable to overrule this program. -dnl Don't test for $cross_compiling = yes, because it might be 'maybe'. -if test "$cross_compiling" != no; then - AC_CHECK_TOOL([STRIP], [strip], :) -fi -INSTALL_STRIP_PROGRAM="\$(install_sh) -c -s" -AC_SUBST([INSTALL_STRIP_PROGRAM])]) - -# Copyright (C) 2006-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# _AM_SUBST_NOTMAKE(VARIABLE) -# --------------------------- -# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in. -# This macro is traced by Automake. -AC_DEFUN([_AM_SUBST_NOTMAKE]) - -# AM_SUBST_NOTMAKE(VARIABLE) -# -------------------------- -# Public sister of _AM_SUBST_NOTMAKE. -AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)]) - -# Check how to create a tarball. -*- Autoconf -*- - -# Copyright (C) 2004-2013 Free Software Foundation, Inc. -# -# This file is free software; the Free Software Foundation -# gives unlimited permission to copy and/or distribute it, -# with or without modifications, as long as this notice is preserved. - -# _AM_PROG_TAR(FORMAT) -# -------------------- -# Check how to create a tarball in format FORMAT. -# FORMAT should be one of 'v7', 'ustar', or 'pax'. -# -# Substitute a variable $(am__tar) that is a command -# writing to stdout a FORMAT-tarball containing the directory -# $tardir. -# tardir=directory && $(am__tar) > result.tar -# -# Substitute a variable $(am__untar) that extract such -# a tarball read from stdin. -# $(am__untar) < result.tar -# -AC_DEFUN([_AM_PROG_TAR], -[# Always define AMTAR for backward compatibility. Yes, it's still used -# in the wild :-( We should find a proper way to deprecate it ... -AC_SUBST([AMTAR], ['$${TAR-tar}']) - -# We'll loop over all known methods to create a tar archive until one works. -_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none' - -m4_if([$1], [v7], - [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'], - - [m4_case([$1], - [ustar], - [# The POSIX 1988 'ustar' format is defined with fixed-size fields. - # There is notably a 21 bits limit for the UID and the GID. In fact, - # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343 - # and bug#13588). - am_max_uid=2097151 # 2^21 - 1 - am_max_gid=$am_max_uid - # The $UID and $GID variables are not portable, so we need to resort - # to the POSIX-mandated id(1) utility. Errors in the 'id' calls - # below are definitely unexpected, so allow the users to see them - # (that is, avoid stderr redirection). - am_uid=`id -u || echo unknown` - am_gid=`id -g || echo unknown` - AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format]) - if test $am_uid -le $am_max_uid; then - AC_MSG_RESULT([yes]) - else - AC_MSG_RESULT([no]) - _am_tools=none - fi - AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format]) - if test $am_gid -le $am_max_gid; then - AC_MSG_RESULT([yes]) - else - AC_MSG_RESULT([no]) - _am_tools=none - fi], - - [pax], - [], - - [m4_fatal([Unknown tar format])]) - - AC_MSG_CHECKING([how to create a $1 tar archive]) - - # Go ahead even if we have the value already cached. We do so because we - # need to set the values for the 'am__tar' and 'am__untar' variables. - _am_tools=${am_cv_prog_tar_$1-$_am_tools} - - for _am_tool in $_am_tools; do - case $_am_tool in - gnutar) - for _am_tar in tar gnutar gtar; do - AM_RUN_LOG([$_am_tar --version]) && break - done - am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"' - am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"' - am__untar="$_am_tar -xf -" - ;; - plaintar) - # Must skip GNU tar: if it does not support --format= it doesn't create - # ustar tarball either. - (tar --version) >/dev/null 2>&1 && continue - am__tar='tar chf - "$$tardir"' - am__tar_='tar chf - "$tardir"' - am__untar='tar xf -' - ;; - pax) - am__tar='pax -L -x $1 -w "$$tardir"' - am__tar_='pax -L -x $1 -w "$tardir"' - am__untar='pax -r' - ;; - cpio) - am__tar='find "$$tardir" -print | cpio -o -H $1 -L' - am__tar_='find "$tardir" -print | cpio -o -H $1 -L' - am__untar='cpio -i -H $1 -d' - ;; - none) - am__tar=false - am__tar_=false - am__untar=false - ;; - esac - - # If the value was cached, stop now. We just wanted to have am__tar - # and am__untar set. - test -n "${am_cv_prog_tar_$1}" && break - - # tar/untar a dummy directory, and stop if the command works. - rm -rf conftest.dir - mkdir conftest.dir - echo GrepMe > conftest.dir/file - AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar]) - rm -rf conftest.dir - if test -s conftest.tar; then - AM_RUN_LOG([$am__untar <conftest.tar]) - AM_RUN_LOG([cat conftest.dir/file]) - grep GrepMe conftest.dir/file >/dev/null 2>&1 && break - fi - done - rm -rf conftest.dir - - AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool]) - AC_MSG_RESULT([$am_cv_prog_tar_$1])]) - -AC_SUBST([am__tar]) -AC_SUBST([am__untar]) -]) # _AM_PROG_TAR - -m4_include([acinclude.m4]) diff --git a/signal.c b/signal.c @@ -15,8 +15,9 @@ void (*sys_signal(int signum, void (*handler)(int)))(int) { new.sa_handler = handler; new.sa_flags = 0; /* clear SA_RESTART */ sigfillset(&new.sa_mask); - sigaction(signum, &new, &old); - return old.sa_handler; + if (sigaction(signum, &new, &old) == 0) + return old.sa_handler; + return SIG_DFL; } #else void (*sys_signal(int signum, void (*handler)(int)))(int) {