about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/bits/sigaction.h
blob: 1806bb2e92545ca917b57270add7fea1e31c2b48 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
/* The proper definitions for Linux's sigaction.
   Copyright (C) 1993, 1994, 1995, 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.  */
    int sa_flags;

    /* Restore handler.  */
    void (*sa_restorer) __P ((void));
  };

/* Bits in `sa_flags'.  */
#define	SA_NOCLDSTOP  1		 /* Don't send SIGCHLD when children stop.  */
#ifdef __USE_MISC
# define SA_STACK     0x08000000 /* Use signal stack by using `sa_restorer'. */
# define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */
# define SA_INTERRUPT 0x20000000 /* Historical no-op.  */
# define SA_NODEFER   0x40000000 /* Don't automatically block the signal when
				    its handler is being executed.  */
# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */

/* Some aliases for the SA_ constants.  */
# define SA_NOMASK    SA_NODEFER
# define SA_ONESHOT   SA_RESETHAND
#endif

/* Values for the HOW argument to `sigprocmask'.  */
#define	SIG_BLOCK     0		 /* Block signals.  */
#define	SIG_UNBLOCK   1		 /* Unblock signals.  */
#define	SIG_SETMASK   2		 /* Set the set of blocked signals.  */