mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
/* Copyright (C) 1991-2020 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _BITS_SIGACTION_H
|
|
#define _BITS_SIGACTION_H 1
|
|
|
|
#ifndef _SIGNAL_H
|
|
# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
|
|
#endif
|
|
|
|
/* These definitions match those used by the 4.4 BSD kernel.
|
|
If the operating system has a `sigaction' system call that correctly
|
|
implements the POSIX.1 behavior, there should be a system-dependent
|
|
version of this file that defines `struct sigaction' and the `SA_*'
|
|
constants appropriately. */
|
|
|
|
/* Structure describing the action to be taken when a signal arrives. */
|
|
struct sigaction
|
|
{
|
|
/* Signal handler. */
|
|
#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED
|
|
union
|
|
{
|
|
/* Used if SA_SIGINFO is not set. */
|
|
__sighandler_t sa_handler;
|
|
/* Used if SA_SIGINFO is set. */
|
|
void (*sa_sigaction) (int, siginfo_t *, void *);
|
|
}
|
|
__sigaction_handler;
|
|
# define sa_handler __sigaction_handler.sa_handler
|
|
# define sa_sigaction __sigaction_handler.sa_sigaction
|
|
#else
|
|
__sighandler_t sa_handler;
|
|
#endif
|
|
|
|
/* Additional set of signals to be blocked. */
|
|
__sigset_t sa_mask;
|
|
|
|
/* Special flags. */
|
|
int sa_flags;
|
|
};
|
|
|
|
/* Bits in `sa_flags'. */
|
|
#if defined __USE_XOPEN_EXTENDED || defined __USE_MISC
|
|
# define SA_ONSTACK 0x0001 /* Take signal on signal stack. */
|
|
#endif
|
|
#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
|
|
# define SA_RESTART 0x0002 /* Restart syscall on signal return. */
|
|
# define SA_NODEFER 0x0010 /* Don't automatically block the signal when
|
|
its handler is being executed. */
|
|
# define SA_RESETHAND 0x0004 /* Reset to SIG_DFL on entry to handler. */
|
|
#endif
|
|
#define SA_NOCLDSTOP 0x0008 /* Don't send SIGCHLD when children stop. */
|
|
|
|
#ifdef __USE_MISC
|
|
# define SA_INTERRUPT 0 /* Historical no-op ("not SA_RESTART"). */
|
|
|
|
/* Some aliases for the SA_ constants. */
|
|
# define SA_NOMASK SA_NODEFER
|
|
# define SA_ONESHOT SA_RESETHAND
|
|
# define SA_STACK SA_ONSTACK
|
|
#endif
|
|
|
|
|
|
/* Values for the HOW argument to `sigprocmask'. */
|
|
#define SIG_BLOCK 1 /* Block signals. */
|
|
#define SIG_UNBLOCK 2 /* Unblock signals. */
|
|
#define SIG_SETMASK 3 /* Set the set of blocked signals. */
|
|
|
|
#endif
|