/* Get and/or change the set of blocked signals. */
extern int sigprocmask (int __how, const sigset_t *__restrict __set,
sigset_t *__restrict __oset) __THROW;
/* Change the set of blocked signals to SET,
wait until a signal arrives, and restore the set of blocked signals.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int sigsuspend (const sigset_t *__set) __nonnull ((1));
/* Get and/or set the action for signal SIG. */
extern int sigaction (int __sig, const struct sigaction *__restrict __act,
struct sigaction *__restrict __oact) __THROW;
/* Put in SET all signals that are blocked and waiting to be delivered. */
extern int sigpending (sigset_t *__set) __THROW __nonnull ((1));
/* Select any of pending signals from SET or wait for any to arrive.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int sigwait (const sigset_t *__restrict __set, int *__restrict __sig)
__nonnull ((1, 2));
# ifdef __USE_POSIX199309
/* Select any of pending signals from SET and place information in INFO.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int sigwaitinfo (const sigset_t *__restrict __set,
siginfo_t *__restrict __info) __nonnull ((1));
/* Select any of pending signals from SET and place information in INFO.
Wait the time specified by TIMEOUT if no signal is pending.
This function is a cancellation point and therefore not marked with
__THROW. */
extern int sigtimedwait (const sigset_t *__restrict __set,
siginfo_t *__restrict __info,
const struct timespec *__restrict __timeout)
__nonnull ((1));
/* Send signal SIG to the process PID. Associate data in VAL with the
signal. */
extern int sigqueue (__pid_t __pid, int __sig, const union sigval __val)
__THROW;
# endif /* Use POSIX 199306. */
#endif /* Use POSIX. */
#ifdef __USE_BSD
/* Names of the signals. This variable exists only for compatibility.
Use `strsignal' instead (see ). */
extern const char *const _sys_siglist[_NSIG];
extern const char *const sys_siglist[_NSIG];
/* Structure passed to `sigvec'. */
struct sigvec
{
__sighandler_t sv_handler; /* Signal handler. */
int sv_mask; /* Mask of signals to be blocked. */
int sv_flags; /* Flags (see below). */
# define sv_onstack sv_flags /* 4.2 BSD compatibility. */
};
/* Bits in `sv_flags'. */
# define SV_ONSTACK (1 << 0)/* Take the signal on the signal stack. */
# define SV_INTERRUPT (1 << 1)/* Do not restart system calls. */
# define SV_RESETHAND (1 << 2)/* Reset handler to SIG_DFL on receipt. */
/* If VEC is non-NULL, set the handler for SIG to the `sv_handler' member
of VEC. The signals in `sv_mask' will be blocked while the handler runs.
If the SV_RESETHAND bit is set in `sv_flags', the handler for SIG will be
reset to SIG_DFL before `sv_handler' is entered. If OVEC is non-NULL,
it is filled in with the old information for SIG. */
extern int sigvec (int __sig, const struct sigvec *__vec,
struct sigvec *__ovec) __THROW;
/* Get machine-dependent `struct sigcontext' and signal subcodes. */
# include
/* Restore the state saved in SCP. */
extern int sigreturn (struct sigcontext *__scp) __THROW;
#endif /* use BSD. */
#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
# define __need_size_t
# include
/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
(causing them to fail with EINTR); if INTERRUPT is zero, make system
calls be restarted after signal SIG. */
extern int siginterrupt (int __sig, int __interrupt) __THROW;
# include
# if defined __USE_XOPEN || defined __USE_XOPEN2K8
/* This will define `ucontext_t' and `mcontext_t'. */
# include
# endif
/* Run signals handlers on the stack specified by SS (if not NULL).
If OSS is not NULL, it is filled in with the old signal stack status.
This interface is obsolete and on many platform not implemented. */
extern int sigstack (struct sigstack *__ss, struct sigstack *__oss)
__THROW __attribute_deprecated__;
/* Alternate signal handler stack interface.
This interface should always be preferred over `sigstack'. */
extern int sigaltstack (const struct sigaltstack *__restrict __ss,
struct sigaltstack *__restrict __oss) __THROW;
#endif /* use BSD or X/Open Unix. */
#ifdef __USE_XOPEN_EXTENDED
/* Simplified interface for signal management. */
/* Add SIG to the calling process' signal mask. */
extern int sighold (int __sig) __THROW;
/* Remove SIG from the calling process' signal mask. */
extern int sigrelse (int __sig) __THROW;
/* Set the disposition of SIG to SIG_IGN. */
extern int sigignore (int __sig) __THROW;
/* Set the disposition of SIG. */
extern __sighandler_t sigset (int __sig, __sighandler_t __disp) __THROW;
#endif
#if defined __USE_POSIX199506 || defined __USE_UNIX98
/* Some of the functions for handling signals in threaded programs must
be defined here. */
# include
# include
#endif /* use Unix98 */
/* The following functions are used internally in the C library and in
other code which need deep insights. */
/* Return number of available real-time signal with highest priority. */
extern int __libc_current_sigrtmin (void) __THROW;
/* Return number of available real-time signal with lowest priority. */
extern int __libc_current_sigrtmax (void) __THROW;
#endif /* signal.h */
__END_DECLS
#endif /* not signal.h */