265 lines
8.4 KiB
C
265 lines
8.4 KiB
C
/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
/*
|
|
* ISO C Standard: 4.7 SIGNAL HANDLING <signal.h>
|
|
*/
|
|
|
|
#ifndef _SIGNAL_H
|
|
|
|
#if !defined(__need_sig_atomic_t) && !defined(__need_sigset_t)
|
|
#define _SIGNAL_H 1
|
|
#include <features.h>
|
|
#endif
|
|
|
|
__BEGIN_DECLS
|
|
|
|
#define __need_size_t
|
|
#include <stddef.h>
|
|
|
|
#include <gnu/types.h>
|
|
#include <sigset.h> /* __sigset_t, __sig_atomic_t. */
|
|
|
|
#if !defined(__sig_atomic_t_defined) && \
|
|
(defined(_SIGNAL_H) || defined(__need_sig_atomic_t))
|
|
/* An integral type that can be modified atomically, without the
|
|
possibility of a signal arriving in the middle of the operation. */
|
|
typedef __sig_atomic_t sig_atomic_t;
|
|
#endif /* `sig_atomic_t' undefined and <signal.h> or need `sig_atomic_t'. */
|
|
#undef __need_sig_atomic_t
|
|
|
|
#ifdef _SIGNAL_H
|
|
|
|
#include <signum.h>
|
|
|
|
/* Type of a signal handler. */
|
|
typedef void (*__sighandler_t) __P ((int));
|
|
|
|
/* Set the handler for the signal SIG to HANDLER,
|
|
returning the old handler, or SIG_ERR on error. */
|
|
extern __sighandler_t signal __P ((int __sig, __sighandler_t __handler));
|
|
|
|
/* Send signal SIG to process number PID. If PID is zero,
|
|
send SIG to all processes in the current process's process group.
|
|
If PID is < -1, send SIG to all processes in process group - PID. */
|
|
extern int __kill __P ((__pid_t __pid, int __sig));
|
|
#ifdef __USE_POSIX
|
|
extern int kill __P ((__pid_t __pid, int __sig));
|
|
#endif /* Use POSIX. */
|
|
|
|
#if defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED)
|
|
/* Send SIG to all processes in process group PGRP.
|
|
If PGRP is zero, send SIG to all processes in
|
|
the current process's process group. */
|
|
extern int killpg __P ((__pid_t __pgrp, int __sig));
|
|
#endif /* Use BSD || X/Open Unix. */
|
|
|
|
/* Raise signal SIG, i.e., send SIG to yourself. */
|
|
extern int raise __P ((int __sig));
|
|
|
|
#ifdef __USE_SVID
|
|
/* SVID names for the same things. */
|
|
extern __sighandler_t ssignal __P ((int __sig, __sighandler_t __handler));
|
|
extern int gsignal __P ((int __sig));
|
|
#endif /* Use SVID. */
|
|
|
|
#ifdef __USE_MISC
|
|
/* Print a message describing the meaning of the given signal number. */
|
|
extern void psignal __P ((int __sig, __const char *__s));
|
|
#endif /* Use misc. */
|
|
|
|
|
|
/* Block signals in MASK, returning the old mask. */
|
|
extern int __sigblock __P ((int __mask));
|
|
|
|
/* Set the mask of blocked signals to MASK, returning the old mask. */
|
|
extern int __sigsetmask __P ((int __mask));
|
|
|
|
/* Set the mask of blocked signals to MASK,
|
|
wait for a signal to arrive, and then restore the mask. */
|
|
extern int __sigpause __P ((int __mask));
|
|
|
|
#ifdef __USE_BSD
|
|
#define sigmask(sig) __sigmask(sig)
|
|
|
|
extern int sigblock __P ((int __mask));
|
|
extern int sigsetmask __P ((int __mask));
|
|
extern int sigpause __P ((int __mask));
|
|
|
|
/* This function is here only for compatibility.
|
|
Use `sigprocmask' instead. */
|
|
extern int siggetmask __P ((void));
|
|
#endif /* Use BSD. */
|
|
|
|
|
|
#ifdef __USE_MISC
|
|
#define NSIG _NSIG
|
|
#endif
|
|
|
|
#ifdef __USE_GNU
|
|
typedef __sighandler_t sighandler_t;
|
|
#endif
|
|
|
|
/* 4.4 BSD uses the name `sig_t' for this. */
|
|
#ifdef __USE_BSD
|
|
typedef __sighandler_t sig_t;
|
|
#endif
|
|
|
|
#endif /* <signal.h> included. */
|
|
|
|
|
|
#ifdef __USE_POSIX
|
|
|
|
#if !defined(__sigset_t_defined) && \
|
|
(defined(_SIGNAL_H) || defined(__need_sigset_t))
|
|
typedef __sigset_t sigset_t;
|
|
#define __sigset_t_defined 1
|
|
#endif /* `sigset_t' not defined and <signal.h> or need `sigset_t'. */
|
|
#undef __need_sigset_t
|
|
|
|
#ifdef _SIGNAL_H
|
|
|
|
/* Clear all signals from SET. */
|
|
extern int sigemptyset __P ((sigset_t *__set));
|
|
|
|
/* Set all signals in SET. */
|
|
extern int sigfillset __P ((sigset_t *__set));
|
|
|
|
/* Add SIGNO to SET. */
|
|
extern int sigaddset __P ((sigset_t *__set, int __signo));
|
|
|
|
/* Remove SIGNO from SET. */
|
|
extern int sigdelset __P ((sigset_t *__set, int __signo));
|
|
|
|
/* Return 1 if SIGNO is in SET, 0 if not. */
|
|
extern int sigismember __P ((__const sigset_t *__set, int signo));
|
|
|
|
/* Get the system-specific definitions of `struct sigaction'
|
|
and the `SA_*' and `SIG_*'. constants. */
|
|
#include <sigaction.h>
|
|
|
|
/* Get and/or change the set of blocked signals. */
|
|
extern int __sigprocmask __P ((int __how,
|
|
__const sigset_t *__set, sigset_t *__oset));
|
|
extern int sigprocmask __P ((int __how,
|
|
__const sigset_t *__set, sigset_t *__oset));
|
|
|
|
/* Change the set of blocked signals to SET,
|
|
wait until a signal arrives, and restore the set of blocked signals. */
|
|
extern int __sigsuspend __P ((__const sigset_t *__set));
|
|
extern int sigsuspend __P ((__const sigset_t *__set));
|
|
|
|
/* Get and/or set the action for signal SIG. */
|
|
extern int __sigaction __P ((int __sig, __const struct sigaction *__act,
|
|
struct sigaction *__oact));
|
|
extern int sigaction __P ((int __sig, __const struct sigaction *__act,
|
|
struct sigaction *__oact));
|
|
|
|
/* Put in SET all signals that are blocked and waiting to be delivered. */
|
|
extern int sigpending __P ((sigset_t *__set));
|
|
|
|
|
|
/* Select any of pending signals from SET or wait for any to arrive. */
|
|
extern int __sigwait __P ((__const sigset_t *__set, int *__sig));
|
|
extern int sigwait __P ((__const sigset_t *__set, int *__sig));
|
|
|
|
#endif /* <signal.h> included. */
|
|
|
|
#endif /* Use POSIX. */
|
|
|
|
#if defined(_SIGNAL_H) && defined(__USE_BSD)
|
|
|
|
/* Names of the signals. This variable exists only for compatiblity.
|
|
Use `strsignal' instead (see <string.h>). */
|
|
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 __P ((int __sig, __const struct sigvec *__vec,
|
|
struct sigvec *__ovec));
|
|
extern int sigvec __P ((int __sig, __const struct sigvec *__vec,
|
|
struct sigvec *__ovec));
|
|
|
|
|
|
/* Get machine-dependent `struct sigcontext' and signal subcodes. */
|
|
#include <sigcontext.h>
|
|
|
|
/* Restore the state saved in SCP. */
|
|
extern int __sigreturn __P ((struct sigcontext *__scp));
|
|
extern int sigreturn __P ((struct sigcontext *__scp));
|
|
|
|
#endif /* signal.h included and use BSD. */
|
|
|
|
|
|
#if defined(_SIGNAL_H) && (defined(__USE_BSD) || defined(__USE_XOPEN_EXTENDED))
|
|
|
|
/* 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 __P ((int __sig, int __interrupt));
|
|
|
|
|
|
/* Structure describing a signal stack. */
|
|
struct sigstack
|
|
{
|
|
__ptr_t ss_sp; /* Signal stack pointer. */
|
|
int ss_onstack; /* Nonzero if executing on this stack. */
|
|
};
|
|
|
|
/* 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. */
|
|
extern int sigstack __P ((__const struct sigstack *__ss,
|
|
struct sigstack *__oss));
|
|
|
|
/* Alternate interface. */
|
|
struct sigaltstack
|
|
{
|
|
__ptr_t ss_sp;
|
|
size_t ss_size;
|
|
int ss_flags;
|
|
};
|
|
|
|
extern int sigaltstack __P ((__const struct sigaltstack *__ss,
|
|
struct sigaltstack *__oss));
|
|
|
|
#endif /* signal.h included and use BSD or X/Open Unix. */
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* signal.h */
|