mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-25 06:20:06 +00:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
376 lines
12 KiB
C
376 lines
12 KiB
C
/* Copyright (C) 1991-2018 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 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.
|
|
|
|
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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/*
|
|
* ISO C99 Standard: 7.14 Signal handling <signal.h>
|
|
*/
|
|
|
|
#ifndef _SIGNAL_H
|
|
#define _SIGNAL_H
|
|
|
|
#include <features.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
#include <bits/types.h>
|
|
#include <bits/signum.h>
|
|
|
|
#include <bits/types/sig_atomic_t.h>
|
|
|
|
#if defined __USE_POSIX
|
|
#include <bits/types/sigset_t.h>
|
|
#endif
|
|
|
|
#if defined __USE_XOPEN || defined __USE_XOPEN2K
|
|
# ifndef __pid_t_defined
|
|
typedef __pid_t pid_t;
|
|
# define __pid_t_defined
|
|
#endif
|
|
#ifdef __USE_XOPEN
|
|
# endif
|
|
# ifndef __uid_t_defined
|
|
typedef __uid_t uid_t;
|
|
# define __uid_t_defined
|
|
# endif
|
|
#endif /* Unix98 */
|
|
|
|
#ifdef __USE_POSIX199309
|
|
/* We need `struct timespec' later on. */
|
|
# include <bits/types/struct_timespec.h>
|
|
#endif
|
|
|
|
#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED
|
|
# include <bits/types/siginfo_t.h>
|
|
# include <bits/siginfo-consts.h>
|
|
#endif
|
|
|
|
#ifdef __USE_MISC
|
|
# include <bits/types/sigval_t.h>
|
|
#endif
|
|
|
|
#ifdef __USE_POSIX199309
|
|
# include <bits/types/sigevent_t.h>
|
|
# include <bits/sigevent-consts.h>
|
|
#endif
|
|
|
|
|
|
/* Type of a signal handler. */
|
|
typedef void (*__sighandler_t) (int);
|
|
|
|
/* The X/Open definition of `signal' specifies the SVID semantic. Use
|
|
the additional function `sysv_signal' when X/Open compatibility is
|
|
requested. */
|
|
extern __sighandler_t __sysv_signal (int __sig, __sighandler_t __handler)
|
|
__THROW;
|
|
#ifdef __USE_GNU
|
|
extern __sighandler_t sysv_signal (int __sig, __sighandler_t __handler)
|
|
__THROW;
|
|
#endif
|
|
|
|
/* Set the handler for the signal SIG to HANDLER, returning the old
|
|
handler, or SIG_ERR on error.
|
|
By default `signal' has the BSD semantic. */
|
|
#ifdef __USE_MISC
|
|
extern __sighandler_t signal (int __sig, __sighandler_t __handler)
|
|
__THROW;
|
|
#else
|
|
/* Make sure the used `signal' implementation is the SVID version. */
|
|
# ifdef __REDIRECT_NTH
|
|
extern __sighandler_t __REDIRECT_NTH (signal,
|
|
(int __sig, __sighandler_t __handler),
|
|
__sysv_signal);
|
|
# else
|
|
# define signal __sysv_signal
|
|
# endif
|
|
#endif
|
|
|
|
#if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8
|
|
/* The X/Open definition of `signal' conflicts with the BSD version.
|
|
So they defined another function `bsd_signal'. */
|
|
extern __sighandler_t bsd_signal (int __sig, __sighandler_t __handler)
|
|
__THROW;
|
|
#endif
|
|
|
|
/* 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. */
|
|
#ifdef __USE_POSIX
|
|
extern int kill (__pid_t __pid, int __sig) __THROW;
|
|
#endif /* Use POSIX. */
|
|
|
|
#if defined __USE_MISC || 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 (__pid_t __pgrp, int __sig) __THROW;
|
|
#endif /* Use misc || X/Open Unix. */
|
|
|
|
/* Raise signal SIG, i.e., send SIG to yourself. */
|
|
extern int raise (int __sig) __THROW;
|
|
|
|
#ifdef __USE_MISC
|
|
/* SVID names for the same things. */
|
|
extern __sighandler_t ssignal (int __sig, __sighandler_t __handler)
|
|
__THROW;
|
|
extern int gsignal (int __sig) __THROW;
|
|
#endif /* Use misc. */
|
|
|
|
#ifdef __USE_XOPEN2K8
|
|
/* Print a message describing the meaning of the given signal number. */
|
|
extern void psignal (int __sig, const char *__s);
|
|
|
|
/* Print a message describing the meaning of the given signal information. */
|
|
extern void psiginfo (const siginfo_t *__pinfo, const char *__s);
|
|
#endif /* POSIX 2008. */
|
|
|
|
|
|
|
|
/* The `sigpause' function in X/Open defines the argument as the
|
|
signal number. This requires redirecting to another function
|
|
because the default version in glibc uses an old BSD interface.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
|
|
#ifdef __USE_XOPEN_EXTENDED
|
|
# ifdef __GNUC__
|
|
extern int sigpause (int __sig) __asm__ ("__xpg_sigpause");
|
|
# else
|
|
extern int __sigpause (int __sig_or_mask, int __is_sig);
|
|
/* Remove a signal from the signal mask and suspend the process. */
|
|
# define sigpause(sig) __sigpause ((sig), 1)
|
|
# endif
|
|
#endif
|
|
|
|
|
|
#ifdef __USE_MISC
|
|
/* None of the following functions should be used anymore. They are here
|
|
only for compatibility. A single word (`int') is not guaranteed to be
|
|
enough to hold a complete signal mask and therefore these functions
|
|
simply do not work in many situations. Use `sigprocmask' instead. */
|
|
|
|
/* Compute mask for signal SIG. */
|
|
# define sigmask(sig) ((int)(1u << ((sig) - 1)))
|
|
|
|
/* Block signals in MASK, returning the old mask. */
|
|
extern int sigblock (int __mask) __THROW __attribute_deprecated__;
|
|
|
|
/* Set the mask of blocked signals to MASK, returning the old mask. */
|
|
extern int sigsetmask (int __mask) __THROW __attribute_deprecated__;
|
|
|
|
/* Return currently selected signal mask. */
|
|
extern int siggetmask (void) __THROW __attribute_deprecated__;
|
|
#endif /* Use misc. */
|
|
|
|
|
|
#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_MISC
|
|
typedef __sighandler_t sig_t;
|
|
#endif
|
|
|
|
#ifdef __USE_POSIX
|
|
|
|
/* Clear all signals from SET. */
|
|
extern int sigemptyset (sigset_t *__set) __THROW __nonnull ((1));
|
|
|
|
/* Set all signals in SET. */
|
|
extern int sigfillset (sigset_t *__set) __THROW __nonnull ((1));
|
|
|
|
/* Add SIGNO to SET. */
|
|
extern int sigaddset (sigset_t *__set, int __signo) __THROW __nonnull ((1));
|
|
|
|
/* Remove SIGNO from SET. */
|
|
extern int sigdelset (sigset_t *__set, int __signo) __THROW __nonnull ((1));
|
|
|
|
/* Return 1 if SIGNO is in SET, 0 if not. */
|
|
extern int sigismember (const sigset_t *__set, int __signo)
|
|
__THROW __nonnull ((1));
|
|
|
|
# ifdef __USE_GNU
|
|
/* Return non-empty value is SET is not empty. */
|
|
extern int sigisemptyset (const sigset_t *__set) __THROW __nonnull ((1));
|
|
|
|
/* Build new signal set by combining the two inputs set using logical AND. */
|
|
extern int sigandset (sigset_t *__set, const sigset_t *__left,
|
|
const sigset_t *__right) __THROW __nonnull ((1, 2, 3));
|
|
|
|
/* Build new signal set by combining the two inputs set using logical OR. */
|
|
extern int sigorset (sigset_t *__set, const sigset_t *__left,
|
|
const sigset_t *__right) __THROW __nonnull ((1, 2, 3));
|
|
# endif /* GNU */
|
|
|
|
/* Get the system-specific definitions of `struct sigaction'
|
|
and the `SA_*' and `SIG_*'. constants. */
|
|
# include <bits/sigaction.h>
|
|
|
|
/* 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));
|
|
|
|
|
|
# ifdef __USE_POSIX199506
|
|
/* 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));
|
|
# endif /* Use POSIX 1995. */
|
|
|
|
# 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_MISC
|
|
|
|
/* Names of the signals. This variable exists only for compatibility.
|
|
Use `strsignal' instead (see <string.h>). */
|
|
extern const char *const _sys_siglist[_NSIG];
|
|
extern const char *const sys_siglist[_NSIG];
|
|
|
|
|
|
/* Get machine-dependent `struct sigcontext' and signal subcodes. */
|
|
# include <bits/sigcontext.h>
|
|
|
|
/* Restore the state saved in SCP. */
|
|
extern int sigreturn (struct sigcontext *__scp) __THROW;
|
|
|
|
#endif /* Use misc. */
|
|
|
|
|
|
#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
|
|
# define __need_size_t
|
|
# include <stddef.h>
|
|
|
|
# include <bits/types/stack_t.h>
|
|
# if defined __USE_XOPEN || defined __USE_XOPEN2K8
|
|
/* This will define `ucontext_t' and `mcontext_t'. */
|
|
# include <sys/ucontext.h>
|
|
# endif
|
|
#endif /* Use POSIX.1-2008 or X/Open Unix. */
|
|
|
|
#if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
|
|
/* 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 <bits/sigstack.h>
|
|
# include <bits/ss_flags.h>
|
|
|
|
/* Alternate signal handler stack interface.
|
|
This interface should always be preferred over `sigstack'. */
|
|
extern int sigaltstack (const stack_t *__restrict __ss,
|
|
stack_t *__restrict __oss) __THROW;
|
|
#endif /* __USE_XOPEN_EXTENDED || __USE_MISC */
|
|
|
|
#if ((defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8) \
|
|
|| defined __USE_MISC)
|
|
# include <bits/types/struct_sigstack.h>
|
|
#endif
|
|
|
|
#if ((defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K) \
|
|
|| defined __USE_MISC)
|
|
/* 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__;
|
|
#endif
|
|
|
|
#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 <bits/pthreadtypes.h>
|
|
# include <bits/sigthread.h>
|
|
#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;
|
|
|
|
#define SIGRTMIN (__libc_current_sigrtmin ())
|
|
#define SIGRTMAX (__libc_current_sigrtmax ())
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* not signal.h */
|