1 /* The proper definitions for Linux's sigaction.
2 Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with the GNU C Library; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
21 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
24 /* Structure describing the action to be taken when a signal arrives. */
30 /* Used if SA_SIGINFO is not set. */
31 __sighandler_t sa_handler;
32 /* Used if SA_SIGINFO is set. */
33 void (*sa_sigaction) __P ((int, siginfo_t *, void *));
36 #define sa_handler __sigaction_handler.sa_handler
37 #define sa_sigaction __sigaction_handler.sa_sigaction
39 /* Additional set of signals to be blocked. */
45 /* Restore handler. */
46 void (*sa_restorer) __P ((void));
49 /* Bits in `sa_flags'. */
50 #define SA_NOCLDSTOP 1 /* Don't send SIGCHLD when children stop. */
51 #define SA_SIGINFO 4 /* Invoke signal-catching function with
52 three arguments instead of one. */
53 #if defined __USE_UNIX98 || defined __USE_MISC
54 # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */
55 # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */
56 # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when
57 its handler is being executed. */
58 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */
61 # define SA_INTERRUPT 0x20000000 /* Historical no-op. */
63 /* Some aliases for the SA_ constants. */
64 # define SA_NOMASK SA_NODEFER
65 # define SA_ONESHOT SA_RESETHAND
66 # define SA_STACK SA_ONSTACK
69 /* Values for the HOW argument to `sigprocmask'. */
70 #define SIG_BLOCK 0 /* Block signals. */
71 #define SIG_UNBLOCK 1 /* Unblock signals. */
72 #define SIG_SETMASK 2 /* Set the set of blocked signals. */