glibc/sysdeps/unix/sysv/linux/mips/bits/sigaction.h

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/* The proper definitions for Linux/MIPS's sigaction.
Copyright (C) 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2003
Free Software Foundation, Inc.
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This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
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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.
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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
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
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#ifndef _SIGNAL_H
# error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
#endif
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/* Structure describing the action to be taken when a signal arrives. */
struct sigaction
{
/* Special flags. */
unsigned int sa_flags;
/* Signal handler. */
#ifdef __USE_POSIX199309
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
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__sighandler_t sa_handler;
#endif
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/* Additional set of signals to be blocked. */
__sigset_t sa_mask;
/* The ABI says here are two unused ints following. */
/* Restore handler. */
void (*sa_restorer) (void);
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#if _MIPS_SZPTR < 64
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int sa_resv[1];
#endif
};
/* Bits in `sa_flags'. */
/* Please note that some Linux kernels versions use different values for these
flags which is a bug in those kernel versions. */
#define SA_NOCLDSTOP 0x00000001 /* Don't send SIGCHLD when children stop. */
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#define SA_NOCLDWAIT 0x00010000 /* Don't create zombie on child death. */
#define SA_SIGINFO 0x00000008 /* Invoke signal-catching function with
three arguments instead of one. */
#if defined __USE_UNIX98 || defined __USE_MISC
# define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */
# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */
# define SA_RESTART 0x10000000 /* Restart syscall on signal return. */
# define SA_NODEFER 0x40000000 /* Don't automatically block the signal when
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its handler is being executed. */
#endif
#ifdef __USE_MISC
# define SA_INTERRUPT 0x20000000 /* Historical no-op. */
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/* Some aliases for the SA_ constants. */
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# define SA_NOMASK SA_NODEFER
# define SA_ONESHOT SA_RESETHAND
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# define SA_STACK SA_ONSTACK
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#endif
/* Values for the HOW argument to `sigprocmask'. */
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#define SIG_NOP 0 /* 0 is unused to catch errors */
#define SIG_BLOCK 1 /* Block signals. */
#define SIG_UNBLOCK 2 /* Unblock signals. */
#define SIG_SETMASK 3 /* Set the set of blocked signals. */
#ifdef __USE_MISC
# define SIG_SETMASK32 256 /* Goodie from SGI for BSD compatibility:
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set only the low 32 bit of the sigset. */
#endif