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d03e779a72
rm_/lib/signal.in.h
aixiao d03e779a72 coreutils 9.1 version
2022-07-28 14:16:50 +08:00

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/* A GNU-like <signal.h>.
Copyright (C) 2006-2022 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://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
/* Mac OS X 10.3, FreeBSD 6.4, OpenBSD 3.8, OSF/1 4.0, Solaris 2.6, Android,
OS/2 kLIBC 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 __ANDROID__ || defined __KLIBC__) \
&& ! 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 *restrict new_mask,
sigset_t *restrict old_mask));
_GL_CXXALIAS_RPL (pthread_sigmask, int,
(int how,
const sigset_t *restrict new_mask,
sigset_t *restrict old_mask));
# else
# if !(@HAVE_PTHREAD_SIGMASK@ || defined pthread_sigmask)
_GL_FUNCDECL_SYS (pthread_sigmask, int,
(int how,
const sigset_t *restrict new_mask,
sigset_t *restrict old_mask));
# endif
_GL_CXXALIAS_SYS (pthread_sigmask, int,
(int how,
const sigset_t *restrict new_mask,
sigset_t *restrict old_mask));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (pthread_sigmask);
# endif
#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_RAISE@
# if @REPLACE_RAISE@
# 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
# if !@HAVE_RAISE@
_GL_FUNCDECL_SYS (raise, int, (int sig));
# endif
_GL_CXXALIAS_SYS (raise, int, (int sig));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (raise);
# endif
#elif defined GNULIB_POSIXCHECK
# undef raise
/* Assume raise is always declared. */
_GL_WARN_ON_USE (raise, "raise can crash on native Windows - "
"use gnulib module raise for portability");
#endif
#if @GNULIB_SIGPROCMASK@
# if !@HAVE_POSIX_SIGNALBLOCKING@
# ifndef GNULIB_defined_signal_blocking
# define GNULIB_defined_signal_blocking 1
# endif
/* 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
/* When also using extern inline, suppress the use of static inline in
standard headers of problematic Apple configurations, as Libc at
least through Libc-825.26 (2013-04-09) mishandles it; see, e.g.,
<https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html>.
Perhaps Apple will fix this some day. */
#if (defined _GL_EXTERN_INLINE_IN_USE && defined __APPLE__ \
&& (defined __i386__ || defined __x86_64__))
# undef sigaddset
# undef sigdelset
# undef sigemptyset
# undef sigfillset
# undef sigismember
#endif
/* Test whether a given signal is contained in a signal set. */
# if @HAVE_POSIX_SIGNALBLOCKING@
/* This function is defined as a macro on Mac OS 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 Mac OS 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 Mac OS 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 Mac OS 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 Mac OS 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 *restrict set,
sigset_t *restrict old_set));
# endif
_GL_CXXALIAS_SYS (sigprocmask, int,
(int operation,
const sigset_t *restrict set,
sigset_t *restrict 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
/* On OpenBSD, the declaration of 'signal' may not be present at this point,
because it occurs in <sys/signal.h>, not <signal.h> directly. */
# if defined __OpenBSD__
_GL_FUNCDECL_SYS (signal, _gl_function_taking_int_returning_void_t,
(int sig, _gl_function_taking_int_returning_void_t func));
# endif
_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
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