Commit 1301ac26 authored by Paul Eggert's avatar Paul Eggert

Merge: Use pthread_sigmask, not sigprocmask (Bug#9010).

parents 1b854618 67517972
2011-07-08 Paul Eggert <eggert@cs.ucla.edu>
Add gnulib support for pthread_sigmask (Bug#9010).
* Makefile.in (GNULIB_MODULES): Add pthread_sigmask.
* configure.in (AC_TYPE_UID_T): New dummy macro.
Configure gnulib after adjusting LIBS,
so that gnulib can assume the libraries in LIBS.
* lib/signal.in.h, m4/pthread_sigmask.m4, m4/signal_h.m4:
* lib/pthread_sigprocmask.c, lib/sigprocmask.c, m4/signalblocking.m4:
New files, automatically imported from gnulib.
* lib/gnulib.mk, m4/gl-comp.m4: Automatically-imported update
due to the above changes.
* .bzrignore: Add lib/signal.h.
* src/Makefile.in (LIB_PTHREAD_SIGMASK): New macro.
(LIBES): Use it.
* lib/getopt.c, lib/unistd.in.h, m4/getopt.m4: Merge from gnulib.
2011-07-07 Andreas Schwab <schwab@linux-m68k.org>
......
......@@ -335,7 +335,8 @@ GNULIB_MODULES = \
alloca-opt \
careadlinkat crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr \
dup2 \
filemode getloadavg getopt-gnu ignore-value intprops lstat mktime readlink \
filemode getloadavg getopt-gnu ignore-value intprops lstat \
mktime pthread_sigmask readlink \
socklen stdarg stdio strftime strtoumax symlink sys_stat
GNULIB_TOOL_FLAGS = \
--conditional-dependencies --import --no-changelog --no-vc-files \
......
......@@ -984,6 +984,8 @@ fi
# Suppress obsolescent Autoconf test for size_t; Emacs assumes C89 or better.
AC_DEFUN([AC_TYPE_SIZE_T])
# Likewise for obsolescent test for uid_t, gid_t; Emacs assumes them.
AC_DEFUN([AC_TYPE_UID_T])
dnl Do this early because it can frob feature test macros for Unix-98 &c.
AC_SYS_LARGEFILE
......@@ -2725,11 +2727,6 @@ AC_FUNC_FSEEKO
AC_FUNC_GETPGRP
# Configure gnulib.
gl_ASSERT_NO_GNULIB_POSIXCHECK
gl_ASSERT_NO_GNULIB_TESTS
gl_INIT
# UNIX98 PTYs.
AC_CHECK_FUNCS(grantpt)
......@@ -3333,6 +3330,10 @@ AC_SUBST(CYGWIN_OBJ)
AC_SUBST(PRE_ALLOC_OBJ)
AC_SUBST(POST_ALLOC_OBJ)
# Configure gnulib here, now that we know LIBS.
gl_ASSERT_NO_GNULIB_POSIXCHECK
gl_ASSERT_NO_GNULIB_TESTS
gl_INIT
case "$opsys" in
aix4-2) LD_SWITCH_SYSTEM_TEMACS="-Wl,-bnodelcsect" ;;
......
......@@ -9,7 +9,7 @@
# the same distribution terms as the rest of that program.
#
# Generated by gnulib-tool.
# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=. --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt careadlinkat crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dup2 filemode getloadavg getopt-gnu ignore-value intprops lstat mktime readlink socklen stdarg stdio strftime strtoumax symlink sys_stat
# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=. --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt careadlinkat crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dup2 filemode getloadavg getopt-gnu ignore-value intprops lstat mktime pthread_sigmask readlink socklen stdarg stdio strftime strtoumax symlink sys_stat
MOSTLYCLEANFILES += core *.stackdump
......@@ -294,6 +294,15 @@ EXTRA_libgnu_a_SOURCES += mktime.c
## end gnulib module mktime
## begin gnulib module pthread_sigmask
EXTRA_DIST += pthread_sigmask.c
EXTRA_libgnu_a_SOURCES += pthread_sigmask.c
## end gnulib module pthread_sigmask
## begin gnulib module readlink
......@@ -303,6 +312,56 @@ EXTRA_libgnu_a_SOURCES += readlink.c
## end gnulib module readlink
## begin gnulib module signal
BUILT_SOURCES += signal.h
# We need the following in order to create <signal.h> when the system
# doesn't have a complete one.
signal.h: signal.in.h $(top_builddir)/config.status $(CXXDEFS_H) $(ARG_NONNULL_H) $(WARN_ON_USE_H)
$(AM_V_GEN)rm -f $@-t $@ && \
{ echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
sed -e 's|@''GUARD_PREFIX''@|GL|g' \
-e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
-e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
-e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
-e 's|@''NEXT_SIGNAL_H''@|$(NEXT_SIGNAL_H)|g' \
-e 's|@''GNULIB_PTHREAD_SIGMASK''@|$(GNULIB_PTHREAD_SIGMASK)|g' \
-e 's/@''GNULIB_SIGNAL_H_SIGPIPE''@/$(GNULIB_SIGNAL_H_SIGPIPE)/g' \
-e 's/@''GNULIB_SIGPROCMASK''@/$(GNULIB_SIGPROCMASK)/g' \
-e 's/@''GNULIB_SIGACTION''@/$(GNULIB_SIGACTION)/g' \
-e 's|@''HAVE_POSIX_SIGNALBLOCKING''@|$(HAVE_POSIX_SIGNALBLOCKING)|g' \
-e 's|@''HAVE_PTHREAD_SIGMASK''@|$(HAVE_PTHREAD_SIGMASK)|g' \
-e 's|@''HAVE_SIGSET_T''@|$(HAVE_SIGSET_T)|g' \
-e 's|@''HAVE_SIGINFO_T''@|$(HAVE_SIGINFO_T)|g' \
-e 's|@''HAVE_SIGACTION''@|$(HAVE_SIGACTION)|g' \
-e 's|@''HAVE_STRUCT_SIGACTION_SA_SIGACTION''@|$(HAVE_STRUCT_SIGACTION_SA_SIGACTION)|g' \
-e 's|@''HAVE_TYPE_VOLATILE_SIG_ATOMIC_T''@|$(HAVE_TYPE_VOLATILE_SIG_ATOMIC_T)|g' \
-e 's|@''HAVE_SIGHANDLER_T''@|$(HAVE_SIGHANDLER_T)|g' \
-e 's|@''REPLACE_PTHREAD_SIGMASK''@|$(REPLACE_PTHREAD_SIGMASK)|g' \
-e '/definitions of _GL_FUNCDECL_RPL/r $(CXXDEFS_H)' \
-e '/definition of _GL_ARG_NONNULL/r $(ARG_NONNULL_H)' \
-e '/definition of _GL_WARN_ON_USE/r $(WARN_ON_USE_H)' \
< $(srcdir)/signal.in.h; \
} > $@-t && \
mv $@-t $@
MOSTLYCLEANFILES += signal.h signal.h-t
EXTRA_DIST += signal.in.h
## end gnulib module signal
## begin gnulib module sigprocmask
if gl_GNULIB_ENABLED_sigprocmask
endif
EXTRA_DIST += sigprocmask.c
EXTRA_libgnu_a_SOURCES += sigprocmask.c
## end gnulib module sigprocmask
## begin gnulib module stat
if gl_GNULIB_ENABLED_stat
......
/* POSIX compatible signal blocking for threads.
Copyright (C) 2011 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 <config.h>
/* Specification. */
#include <signal.h>
#include <errno.h>
int
pthread_sigmask (int how, const sigset_t *new_mask, sigset_t *old_mask)
{
int ret = sigprocmask (how, new_mask, old_mask);
return (ret < 0 ? errno : 0);
}
/* A GNU-like <signal.h>.
Copyright (C) 2006-2011 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/>. */
#if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
#endif
@PRAGMA_COLUMNS@
#if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
/* Special invocation convention:
- Inside glibc header files.
- On glibc systems we have a sequence of nested includes
<signal.h> -> <ucontext.h> -> <signal.h>.
In this situation, the functions are not yet declared, therefore we cannot
provide the C++ aliases.
- On glibc systems with GCC 4.3 we have a sequence of nested includes
<csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
In this situation, some of the functions are not yet declared, therefore
we cannot provide the C++ aliases. */
# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
#else
/* Normal invocation convention. */
#ifndef _@GUARD_PREFIX@_SIGNAL_H
#define _GL_ALREADY_INCLUDING_SIGNAL_H
/* Define pid_t, uid_t.
Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
us; so include <sys/types.h> now, before the second inclusion guard. */
#include <sys/types.h>
/* The include_next requires a split double-inclusion guard. */
#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
#undef _GL_ALREADY_INCLUDING_SIGNAL_H
#ifndef _@GUARD_PREFIX@_SIGNAL_H
#define _@GUARD_PREFIX@_SIGNAL_H
/* MacOS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6 declare
pthread_sigmask in <pthread.h>, not in <signal.h>.
But avoid namespace pollution on glibc systems.*/
#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
&& ((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ || defined __sun) \
&& ! defined __GLIBC__
# include <pthread.h>
#endif
/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
/* The definition of _GL_ARG_NONNULL is copied here. */
/* The definition of _GL_WARN_ON_USE is copied here. */
/* On AIX, sig_atomic_t already includes volatile. C99 requires that
'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
Hence, redefine this to a non-volatile type as needed. */
#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
# if !GNULIB_defined_sig_atomic_t
typedef int rpl_sig_atomic_t;
# undef sig_atomic_t
# define sig_atomic_t rpl_sig_atomic_t
# define GNULIB_defined_sig_atomic_t 1
# endif
#endif
/* A set or mask of signals. */
#if !@HAVE_SIGSET_T@
# if !GNULIB_defined_sigset_t
typedef unsigned int sigset_t;
# define GNULIB_defined_sigset_t 1
# endif
#endif
/* Define sighandler_t, the type of signal handlers. A GNU extension. */
#if !@HAVE_SIGHANDLER_T@
# ifdef __cplusplus
extern "C" {
# endif
# if !GNULIB_defined_sighandler_t
typedef void (*sighandler_t) (int);
# define GNULIB_defined_sighandler_t 1
# endif
# ifdef __cplusplus
}
# endif
#endif
#if @GNULIB_SIGNAL_H_SIGPIPE@
# ifndef SIGPIPE
/* Define SIGPIPE to a value that does not overlap with other signals. */
# define SIGPIPE 13
# define GNULIB_defined_SIGPIPE 1
/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
'write', 'stdio'. */
# endif
#endif
/* Maximum signal number + 1. */
#ifndef NSIG
# if defined __TANDEM
# define NSIG 32
# endif
#endif
#if @GNULIB_PTHREAD_SIGMASK@
# if @REPLACE_PTHREAD_SIGMASK@
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef pthread_sigmask
# define pthread_sigmask rpl_pthread_sigmask
# endif
_GL_FUNCDECL_RPL (pthread_sigmask, int,
(int how, const sigset_t *new_mask, sigset_t *old_mask));
_GL_CXXALIAS_RPL (pthread_sigmask, int,
(int how, const sigset_t *new_mask, sigset_t *old_mask));
# else
# if !@HAVE_PTHREAD_SIGMASK@
_GL_FUNCDECL_SYS (pthread_sigmask, int,
(int how, const sigset_t *new_mask, sigset_t *old_mask));
# endif
_GL_CXXALIAS_SYS (pthread_sigmask, int,
(int how, const sigset_t *new_mask, sigset_t *old_mask));
# endif
_GL_CXXALIASWARN (pthread_sigmask);
#elif defined GNULIB_POSIXCHECK
# undef pthread_sigmask
# if HAVE_RAW_DECL_PTHREAD_SIGMASK
_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
"use gnulib module pthread_sigmask for portability");
# endif
#endif
#if @GNULIB_SIGPROCMASK@
# if !@HAVE_POSIX_SIGNALBLOCKING@
/* Maximum signal number + 1. */
# ifndef NSIG
# define NSIG 32
# endif
/* This code supports only 32 signals. */
# if !GNULIB_defined_verify_NSIG_constraint
typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
# define GNULIB_defined_verify_NSIG_constraint 1
# endif
# endif
/* Test whether a given signal is contained in a signal set. */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on MacOS X. */
# if defined __cplusplus && defined GNULIB_NAMESPACE
# undef sigismember
# endif
# else
_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
_GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
_GL_CXXALIASWARN (sigismember);
/* Initialize a signal set to the empty set. */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on MacOS X. */
# if defined __cplusplus && defined GNULIB_NAMESPACE
# undef sigemptyset
# endif
# else
_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
_GL_CXXALIASWARN (sigemptyset);
/* Add a signal to a signal set. */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on MacOS X. */
# if defined __cplusplus && defined GNULIB_NAMESPACE
# undef sigaddset
# endif
# else
_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
_GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
_GL_CXXALIASWARN (sigaddset);
/* Remove a signal from a signal set. */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on MacOS X. */
# if defined __cplusplus && defined GNULIB_NAMESPACE
# undef sigdelset
# endif
# else
_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
_GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
_GL_CXXALIASWARN (sigdelset);
/* Fill a signal set with all possible signals. */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on MacOS X. */
# if defined __cplusplus && defined GNULIB_NAMESPACE
# undef sigfillset
# endif
# else
_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
_GL_CXXALIASWARN (sigfillset);
/* Return the set of those blocked signals that are pending. */
# if !@HAVE_POSIX_SIGNALBLOCKING@
_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
# endif
_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
_GL_CXXALIASWARN (sigpending);
/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
Then, if SET is not NULL, affect the current set of blocked signals by
combining it with *SET as indicated in OPERATION.
In this implementation, you are not allowed to change a signal handler
while the signal is blocked. */
# if !@HAVE_POSIX_SIGNALBLOCKING@
# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
# define SIG_SETMASK 1 /* blocked_set = *set; */
# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
_GL_FUNCDECL_SYS (sigprocmask, int,
(int operation, const sigset_t *set, sigset_t *old_set));
# endif
_GL_CXXALIAS_SYS (sigprocmask, int,
(int operation, const sigset_t *set, sigset_t *old_set));
_GL_CXXALIASWARN (sigprocmask);
/* Install the handler FUNC for signal SIG, and return the previous
handler. */
# ifdef __cplusplus
extern "C" {
# endif
# if !GNULIB_defined_function_taking_int_returning_void_t
typedef void (*_gl_function_taking_int_returning_void_t) (int);
# define GNULIB_defined_function_taking_int_returning_void_t 1
# endif
# ifdef __cplusplus
}
# endif
# if !@HAVE_POSIX_SIGNALBLOCKING@
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# define signal rpl_signal
# endif
_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
(int sig, _gl_function_taking_int_returning_void_t func));
_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
(int sig, _gl_function_taking_int_returning_void_t func));
# else
_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
(int sig, _gl_function_taking_int_returning_void_t func));
# endif
_GL_CXXALIASWARN (signal);
/* Raise signal SIG. */
# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef raise
# define raise rpl_raise
# endif
_GL_FUNCDECL_RPL (raise, int, (int sig));
_GL_CXXALIAS_RPL (raise, int, (int sig));
# else
_GL_CXXALIAS_SYS (raise, int, (int sig));
# endif
_GL_CXXALIASWARN (raise);
#elif defined GNULIB_POSIXCHECK
# undef sigaddset
# if HAVE_RAW_DECL_SIGADDSET
_GL_WARN_ON_USE (sigaddset, "sigaddset is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
# undef sigdelset
# if HAVE_RAW_DECL_SIGDELSET
_GL_WARN_ON_USE (sigdelset, "sigdelset is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
# undef sigemptyset
# if HAVE_RAW_DECL_SIGEMPTYSET
_GL_WARN_ON_USE (sigemptyset, "sigemptyset is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
# undef sigfillset
# if HAVE_RAW_DECL_SIGFILLSET
_GL_WARN_ON_USE (sigfillset, "sigfillset is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
# undef sigismember
# if HAVE_RAW_DECL_SIGISMEMBER
_GL_WARN_ON_USE (sigismember, "sigismember is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
# undef sigpending
# if HAVE_RAW_DECL_SIGPENDING
_GL_WARN_ON_USE (sigpending, "sigpending is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
# undef sigprocmask
# if HAVE_RAW_DECL_SIGPROCMASK
_GL_WARN_ON_USE (sigprocmask, "sigprocmask is unportable - "
"use the gnulib module sigprocmask for portability");
# endif
#endif /* @GNULIB_SIGPROCMASK@ */
#if @GNULIB_SIGACTION@
# if !@HAVE_SIGACTION@
# if !@HAVE_SIGINFO_T@
# if !GNULIB_defined_siginfo_types
/* Present to allow compilation, but unsupported by gnulib. */
union sigval
{
int sival_int;
void *sival_ptr;
};
/* Present to allow compilation, but unsupported by gnulib. */
struct siginfo_t
{
int si_signo;
int si_code;
int si_errno;
pid_t si_pid;
uid_t si_uid;
void *si_addr;
int si_status;
long si_band;
union sigval si_value;
};
typedef struct siginfo_t siginfo_t;
# define GNULIB_defined_siginfo_types 1
# endif
# endif /* !@HAVE_SIGINFO_T@ */
/* We assume that platforms which lack the sigaction() function also lack
the 'struct sigaction' type, and vice versa. */
# if !GNULIB_defined_struct_sigaction
struct sigaction
{
union
{
void (*_sa_handler) (int);
/* Present to allow compilation, but unsupported by gnulib. POSIX
says that implementations may, but not must, make sa_sigaction
overlap with sa_handler, but we know of no implementation where
they do not overlap. */
void (*_sa_sigaction) (int, siginfo_t *, void *);
} _sa_func;
sigset_t sa_mask;
/* Not all POSIX flags are supported. */
int sa_flags;
};
# define sa_handler _sa_func._sa_handler
# define sa_sigaction _sa_func._sa_sigaction
/* Unsupported flags are not present. */
# define SA_RESETHAND 1
# define SA_NODEFER 2
# define SA_RESTART 4
# define GNULIB_defined_struct_sigaction 1
# endif
_GL_FUNCDECL_SYS (sigaction, int, (int, const struct sigaction *restrict,
struct sigaction *restrict));
# elif !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@
# define sa_sigaction sa_handler
# endif /* !@HAVE_SIGACTION@, !@HAVE_STRUCT_SIGACTION_SA_SIGACTION@ */
_GL_CXXALIAS_SYS (sigaction, int, (int, const struct sigaction *restrict,
struct sigaction *restrict));
_GL_CXXALIASWARN (sigaction);
#elif defined GNULIB_POSIXCHECK
# undef sigaction
# if HAVE_RAW_DECL_SIGACTION
_GL_WARN_ON_USE (sigaction, "sigaction is unportable - "
"use the gnulib module sigaction for portability");
# endif
#endif
/* Some systems don't have SA_NODEFER. */
#ifndef SA_NODEFER
# define SA_NODEFER 0
#endif
#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif /* _@GUARD_PREFIX@_SIGNAL_H */
#endif
/* POSIX compatible signal blocking.
Copyright (C) 2006-2011 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2006.
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 <config.h>
/* Specification. */
#include <signal.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
/* We assume that a platform without POSIX signal blocking functions
also does not have the POSIX sigaction() function, only the
signal() function. We also assume signal() has SysV semantics,
where any handler is uninstalled prior to being invoked. This is
true for Woe32 platforms. */
/* We use raw signal(), but also provide a wrapper rpl_signal() so
that applications can query or change a blocked signal. */
#undef signal
/* Provide invalid signal numbers as fallbacks if the uncatchable
signals are not defined. */
#ifndef SIGKILL
# define SIGKILL (-1)
#endif
#ifndef SIGSTOP
# define SIGSTOP (-1)
#endif
/* On native Windows, as of 2008, the signal SIGABRT_COMPAT is an alias
for the signal SIGABRT. Only one signal handler is stored for both
SIGABRT and SIGABRT_COMPAT. SIGABRT_COMPAT is not a signal of its own. */
#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
# undef SIGABRT_COMPAT
# define SIGABRT_COMPAT 6
#endif
#ifdef SIGABRT_COMPAT
# define SIGABRT_COMPAT_MASK (1U << SIGABRT_COMPAT)
#else
# define SIGABRT_COMPAT_MASK 0
#endif
typedef void (*handler_t) (int);
/* Handling of gnulib defined signals. */
#if GNULIB_defined_SIGPIPE
static handler_t SIGPIPE_handler = SIG_DFL;
#endif
#if GNULIB_defined_SIGPIPE