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/* The proper definitions for Linux/Alpha sigaction.
Copyright (C) 1996, 1997 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. */
#ifndef _SIGNAL_H
# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
#endif
/* Structure describing the action to be taken when a signal arrives. */
struct sigaction
{
/* Signal handler. */
__sighandler_t sa_handler;
/* Additional set of signals to be blocked. */
__sigset_t sa_mask;
/* Special flags. */
unsigned int sa_flags;
};
/* Bits in `sa_flags'. */
#define SA_NOCLDSTOP 0x00000004 /* Don't send SIGCHLD when children stop. */
#ifdef __USE_MISC
# define SA_ONSTACK 0x00000001 /* Use signal stack by using `sa_restorer'. */
# define SA_RESTART 0x00000002 /* Restart syscall on signal return. */
# define SA_INTERRUPT 0x20000000 /* Historical no-op. */
# define SA_NOMASK 0x00000008 /* Don't automatically block the signal
when its handler is being executed. */
# define SA_ONESHOT 0x00000010 /* Reset to SIG_DFL on entry to handler. */
/* Some aliases for the SA_ constants. */
# define SA_NODEFER SA_NOMASK
# define SA_RESETHAND SA_ONESHOT
# 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. */
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