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/* A GNU-like <signal.h>.
Copyright (C) 2006-2009 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
#if defined __need_sig_atomic_t || defined __need_sigset_t
/* Special invocation convention inside glibc header files. */
# @INCLUDE_NEXT@ @NEXT_SIGNAL_H@
#else
/* Normal invocation convention. */
#ifndef _GL_SIGNAL_H
/* The include_next requires a split double-inclusion guard. */
#@INCLUDE_NEXT@ @NEXT_SIGNAL_H@
#ifndef _GL_SIGNAL_H
#define _GL_SIGNAL_H
/* The definition of GL_LINK_WARNING is copied here. */
/* The definition of _GL_ARG_NONNULL is copied here. */
/* Define pid_t, uid_t.
Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
#include <sys/types.h>
/* 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@
typedef int rpl_sig_atomic_t;
# undef sig_atomic_t
# define sig_atomic_t rpl_sig_atomic_t
#endif
/* A set or mask of signals. */
#if !@HAVE_SIGSET_T@
typedef unsigned int sigset_t;
#endif
#ifdef __cplusplus
extern "C" {
#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
#if @GNULIB_SIGPROCMASK@
# if !@HAVE_POSIX_SIGNALBLOCKING@
/* Maximum signal number + 1. */
# ifndef NSIG
# define NSIG 32
# endif
/* This code supports only 32 signals. */
typedef int verify_NSIG_constraint[2 * (NSIG <= 32) - 1];
/* Test whether a given signal is contained in a signal set. */
extern int sigismember (const sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
/* Initialize a signal set to the empty set. */
extern int sigemptyset (sigset_t *set) _GL_ARG_NONNULL ((1));
/* Add a signal to a signal set. */
extern int sigaddset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
/* Remove a signal from a signal set. */
extern int sigdelset (sigset_t *set, int sig) _GL_ARG_NONNULL ((1));
/* Fill a signal set with all possible signals. */
extern int sigfillset (sigset_t *set) _GL_ARG_NONNULL ((1));
/* Return the set of those blocked signals that are pending. */
extern int sigpending (sigset_t *set) _GL_ARG_NONNULL ((1));
/* 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. */
# 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; */
extern int sigprocmask (int operation, const sigset_t *set, sigset_t *old_set);
# define signal rpl_signal
/* Install the handler FUNC for signal SIG, and return the previous
handler. */
extern void (*signal (int sig, void (*func) (int))) (int);
# if GNULIB_defined_SIGPIPE
/* Raise signal SIG. */
# undef raise
# define raise rpl_raise
extern int raise (int sig);
# endif
# endif /* !@HAVE_POSIX_SIGNALBLOCKING@ */
#elif defined GNULIB_POSIXCHECK
# undef sigaddset
# define sigaddset(s,n) \
(GL_LINK_WARNING ("sigaddset is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigaddset (s, n))
# undef sigdelset
# define sigdelset(s,n) \
(GL_LINK_WARNING ("sigdelset is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigdelset (s, n))
# undef sigemptyset
# define sigemptyset(s) \
(GL_LINK_WARNING ("sigemptyset is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigemptyset (s))
# undef sigfillset
# define sigfillset(s) \
(GL_LINK_WARNING ("sigfillset is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigfillset (s))
# undef sigismember
# define sigismember(s,n) \
(GL_LINK_WARNING ("sigismember is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigismember (s, n))
# undef sigpending
# define sigpending(s) \
(GL_LINK_WARNING ("sigpending is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigpending (s))
# undef sigprocmask
# define sigprocmask(h,s,o) \
(GL_LINK_WARNING ("sigprocmask is unportable - " \
"use gnulib module sigprocmask for portability"), \
sigprocmask (h, s, o))
#endif /* @GNULIB_SIGPROCMASK@ */
#if @GNULIB_SIGACTION@
# if !@HAVE_SIGACTION@
# if !@HAVE_SIGINFO_T@
/* 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;
# endif /* !@HAVE_SIGINFO_T@ */
/* We assume that platforms which lack the sigaction() function also lack
the 'struct sigaction' type, and vice versa. */
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
extern int sigaction (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@ */
#elif defined GNULIB_POSIXCHECK
# undef sigaction
# define sigaction(s,a,o) \
(GL_LINK_WARNING ("sigaction is unportable - " \
"use gnulib module sigaction for portability"), \
sigaction (s, a, o))
#endif
/* Some systems don't have SA_NODEFER. */
#ifndef SA_NODEFER
# define SA_NODEFER 0
#endif
#ifdef __cplusplus
}
#endif
#endif /* _GL_SIGNAL_H */
#endif /* _GL_SIGNAL_H */
#endif
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