488 lines
15 KiB
C
488 lines
15 KiB
C
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/* A GNU-like <signal.h>.
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Copyright (C) 2006-2021 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#if __GNUC__ >= 3
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@PRAGMA_SYSTEM_HEADER@
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#endif
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@PRAGMA_COLUMNS@
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#if defined __need_sig_atomic_t || defined __need_sigset_t || defined _GL_ALREADY_INCLUDING_SIGNAL_H || (defined _SIGNAL_H && !defined __SIZEOF_PTHREAD_MUTEX_T)
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/* Special invocation convention:
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- Inside glibc header files.
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- On glibc systems we have a sequence of nested includes
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<signal.h> -> <ucontext.h> -> <signal.h>.
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In this situation, the functions are not yet declared, therefore we cannot
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provide the C++ aliases.
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- On glibc systems with GCC 4.3 we have a sequence of nested includes
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<csignal> -> </usr/include/signal.h> -> <sys/ucontext.h> -> <signal.h>.
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In this situation, some of the functions are not yet declared, therefore
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we cannot provide the C++ aliases. */
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# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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#else
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/* Normal invocation convention. */
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#ifndef _@GUARD_PREFIX@_SIGNAL_H
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#define _GL_ALREADY_INCLUDING_SIGNAL_H
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/* Define pid_t, uid_t.
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Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>.
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On Solaris 10, <signal.h> includes <sys/types.h>, which eventually includes
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us; so include <sys/types.h> now, before the second inclusion guard. */
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#include <sys/types.h>
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/* The include_next requires a split double-inclusion guard. */
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#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
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#undef _GL_ALREADY_INCLUDING_SIGNAL_H
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#ifndef _@GUARD_PREFIX@_SIGNAL_H
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#define _@GUARD_PREFIX@_SIGNAL_H
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/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android,
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OS/2 kLIBC declare pthread_sigmask in <pthread.h>, not in <signal.h>.
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But avoid namespace pollution on glibc systems.*/
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#if (@GNULIB_PTHREAD_SIGMASK@ || defined GNULIB_POSIXCHECK) \
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&& ((defined __APPLE__ && defined __MACH__) \
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|| defined __FreeBSD__ || defined __OpenBSD__ || defined __osf__ \
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|| defined __sun || defined __ANDROID__ || defined __KLIBC__) \
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&& ! defined __GLIBC__
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# include <pthread.h>
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#endif
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/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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/* The definition of _GL_ARG_NONNULL is copied here. */
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/* The definition of _GL_WARN_ON_USE is copied here. */
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/* On AIX, sig_atomic_t already includes volatile. C99 requires that
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'volatile sig_atomic_t' ignore the extra modifier, but C89 did not.
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Hence, redefine this to a non-volatile type as needed. */
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#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@
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# if !GNULIB_defined_sig_atomic_t
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typedef int rpl_sig_atomic_t;
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# undef sig_atomic_t
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# define sig_atomic_t rpl_sig_atomic_t
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# define GNULIB_defined_sig_atomic_t 1
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# endif
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#endif
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/* A set or mask of signals. */
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#if !@HAVE_SIGSET_T@
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# if !GNULIB_defined_sigset_t
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typedef unsigned int sigset_t;
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# define GNULIB_defined_sigset_t 1
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# endif
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#endif
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/* Define sighandler_t, the type of signal handlers. A GNU extension. */
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#if !@HAVE_SIGHANDLER_T@
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# ifdef __cplusplus
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extern "C" {
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# endif
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# if !GNULIB_defined_sighandler_t
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typedef void (*sighandler_t) (int);
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# define GNULIB_defined_sighandler_t 1
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# endif
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# ifdef __cplusplus
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}
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# endif
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#endif
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#if @GNULIB_SIGNAL_H_SIGPIPE@
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# ifndef SIGPIPE
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/* Define SIGPIPE to a value that does not overlap with other signals. */
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# define SIGPIPE 13
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# define GNULIB_defined_SIGPIPE 1
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/* To actually use SIGPIPE, you also need the gnulib modules 'sigprocmask',
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'write', 'stdio'. */
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# endif
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#endif
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/* Maximum signal number + 1. */
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#ifndef NSIG
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# if defined __TANDEM
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# define NSIG 32
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# endif
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#endif
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#if @GNULIB_PTHREAD_SIGMASK@
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# if @REPLACE_PTHREAD_SIGMASK@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef pthread_sigmask
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# define pthread_sigmask rpl_pthread_sigmask
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# endif
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_GL_FUNCDECL_RPL (pthread_sigmask, int,
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(int how,
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const sigset_t *restrict new_mask,
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sigset_t *restrict old_mask));
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_GL_CXXALIAS_RPL (pthread_sigmask, int,
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(int how,
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const sigset_t *restrict new_mask,
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sigset_t *restrict old_mask));
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# else
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# if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask)
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_GL_FUNCDECL_SYS (pthread_sigmask, int,
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(int how,
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const sigset_t *restrict new_mask,
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sigset_t *restrict old_mask));
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# endif
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_GL_CXXALIAS_SYS (pthread_sigmask, int,
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(int how,
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const sigset_t *restrict new_mask,
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sigset_t *restrict old_mask));
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# endif
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# if __GLIBC__ >= 2
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_GL_CXXALIASWARN (pthread_sigmask);
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# endif
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#elif defined GNULIB_POSIXCHECK
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# undef pthread_sigmask
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# if HAVE_RAW_DECL_PTHREAD_SIGMASK
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_GL_WARN_ON_USE (pthread_sigmask, "pthread_sigmask is not portable - "
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"use gnulib module pthread_sigmask for portability");
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# endif
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#endif
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#if @GNULIB_RAISE@
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# if @REPLACE_RAISE@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef raise
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# define raise rpl_raise
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# endif
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_GL_FUNCDECL_RPL (raise, int, (int sig));
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_GL_CXXALIAS_RPL (raise, int, (int sig));
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# else
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# if !@HAVE_RAISE@
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_GL_FUNCDECL_SYS (raise, int, (int sig));
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# endif
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_GL_CXXALIAS_SYS (raise, int, (int sig));
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# endif
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# if __GLIBC__ >= 2
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_GL_CXXALIASWARN (raise);
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# endif
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#elif defined GNULIB_POSIXCHECK
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# undef raise
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/* Assume raise is always declared. */
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_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
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"use gnulib module raise for portability");
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#endif
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#if @GNULIB_SIGPROCMASK@
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# if !@HAVE_POSIX_SIGNALBLOCKING@
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# ifndef GNULIB_defined_signal_blocking
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# define GNULIB_defined_signal_blocking 1
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# endif
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/* Maximum signal number + 1. */
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# ifndef NSIG
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# define NSIG 32
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# endif
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/* This code supports only 32 signals. */
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# if !GNULIB_defined_verify_NSIG_constraint
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typedef int verify_NSIG_constraint[NSIG <= 32 ? 1 : -1];
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# define GNULIB_defined_verify_NSIG_constraint 1
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# endif
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# endif
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/* When also using extern inline, suppress the use of static inline in
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standard headers of problematic Apple configurations, as Libc at
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least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
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<https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>.
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Perhaps Apple will fix this some day. */
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#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
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&& (defined __i386__ || defined __x86_64__))
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# undef sigaddset
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# undef sigdelset
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# undef sigemptyset
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# undef sigfillset
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# undef sigismember
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#endif
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/* Test whether a given signal is contained in a signal set. */
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# if @HAVE_POSIX_SIGNALBLOCKING@
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/* This function is defined as a macro on Mac OS X. */
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# if defined __cplusplus && defined GNULIB_NAMESPACE
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# undef sigismember
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# endif
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# else
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_GL_FUNCDECL_SYS (sigismember, int, (const sigset_t *set, int sig)
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_GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (sigismember, int, (const sigset_t *set, int sig));
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_GL_CXXALIASWARN (sigismember);
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/* Initialize a signal set to the empty set. */
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# if @HAVE_POSIX_SIGNALBLOCKING@
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/* This function is defined as a macro on Mac OS X. */
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# if defined __cplusplus && defined GNULIB_NAMESPACE
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# undef sigemptyset
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# endif
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# else
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_GL_FUNCDECL_SYS (sigemptyset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (sigemptyset, int, (sigset_t *set));
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_GL_CXXALIASWARN (sigemptyset);
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/* Add a signal to a signal set. */
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# if @HAVE_POSIX_SIGNALBLOCKING@
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/* This function is defined as a macro on Mac OS X. */
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# if defined __cplusplus && defined GNULIB_NAMESPACE
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# undef sigaddset
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# endif
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# else
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_GL_FUNCDECL_SYS (sigaddset, int, (sigset_t *set, int sig)
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_GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (sigaddset, int, (sigset_t *set, int sig));
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_GL_CXXALIASWARN (sigaddset);
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/* Remove a signal from a signal set. */
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# if @HAVE_POSIX_SIGNALBLOCKING@
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/* This function is defined as a macro on Mac OS X. */
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# if defined __cplusplus && defined GNULIB_NAMESPACE
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# undef sigdelset
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# endif
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# else
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_GL_FUNCDECL_SYS (sigdelset, int, (sigset_t *set, int sig)
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_GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (sigdelset, int, (sigset_t *set, int sig));
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_GL_CXXALIASWARN (sigdelset);
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/* Fill a signal set with all possible signals. */
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# if @HAVE_POSIX_SIGNALBLOCKING@
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/* This function is defined as a macro on Mac OS X. */
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# if defined __cplusplus && defined GNULIB_NAMESPACE
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# undef sigfillset
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# endif
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# else
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_GL_FUNCDECL_SYS (sigfillset, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (sigfillset, int, (sigset_t *set));
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_GL_CXXALIASWARN (sigfillset);
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/* Return the set of those blocked signals that are pending. */
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# if !@HAVE_POSIX_SIGNALBLOCKING@
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_GL_FUNCDECL_SYS (sigpending, int, (sigset_t *set) _GL_ARG_NONNULL ((1)));
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# endif
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_GL_CXXALIAS_SYS (sigpending, int, (sigset_t *set));
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_GL_CXXALIASWARN (sigpending);
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/* If OLD_SET is not NULL, put the current set of blocked signals in *OLD_SET.
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Then, if SET is not NULL, affect the current set of blocked signals by
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combining it with *SET as indicated in OPERATION.
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In this implementation, you are not allowed to change a signal handler
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while the signal is blocked. */
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# if !@HAVE_POSIX_SIGNALBLOCKING@
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# define SIG_BLOCK 0 /* blocked_set = blocked_set | *set; */
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# define SIG_SETMASK 1 /* blocked_set = *set; */
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# define SIG_UNBLOCK 2 /* blocked_set = blocked_set & ~*set; */
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_GL_FUNCDECL_SYS (sigprocmask, int,
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(int operation,
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const sigset_t *restrict set,
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sigset_t *restrict old_set));
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# endif
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_GL_CXXALIAS_SYS (sigprocmask, int,
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(int operation,
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const sigset_t *restrict set,
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sigset_t *restrict old_set));
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_GL_CXXALIASWARN (sigprocmask);
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/* Install the handler FUNC for signal SIG, and return the previous
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handler. */
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# ifdef __cplusplus
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extern "C" {
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# endif
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# if !GNULIB_defined_function_taking_int_returning_void_t
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typedef void (*_gl_function_taking_int_returning_void_t) (int);
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# define GNULIB_defined_function_taking_int_returning_void_t 1
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# endif
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# ifdef __cplusplus
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}
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# endif
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# if !@HAVE_POSIX_SIGNALBLOCKING@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# define signal rpl_signal
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# endif
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_GL_FUNCDECL_RPL (signal, _gl_function_taking_int_returning_void_t,
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(int sig, _gl_function_taking_int_returning_void_t func));
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_GL_CXXALIAS_RPL (signal, _gl_function_taking_int_returning_void_t,
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(int sig, _gl_function_taking_int_returning_void_t func));
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# else
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/* On OpenBSD, the declaration of 'signal' may not be present at this point,
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because it occurs in <sys/signal.h>, not <signal.h> directly. */
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# if defined __OpenBSD__
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_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t,
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(int sig, _gl_function_taking_int_returning_void_t func));
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# endif
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|
|
_GL_CXXALIAS_SYS (signal, _gl_function_taking_int_returning_void_t,
|
||
|
|
(int sig, _gl_function_taking_int_returning_void_t func));
|
||
|
|
# endif
|
||
|
|
# if __GLIBC__ >= 2
|
||
|
|
_GL_CXXALIASWARN (signal);
|
||
|
|
# endif
|
||
|
|
|
||
|
|
# if !@HAVE_POSIX_SIGNALBLOCKING@ && GNULIB_defined_SIGPIPE
|
||
|
|
/* Raise signal SIGPIPE. */
|
||
|
|
_GL_EXTERN_C int _gl_raise_SIGPIPE (void);
|
||
|
|
# endif
|
||
|
|
|
||
|
|
#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
|