1 /* The proper definitions for Linux's sigaction.
2 Copyright (C) 1993-1999, 2000 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 Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 # error "Never include <bits/sigaction.h> directly; use <signal.h> instead."
23 /* Structure describing the action to be taken when a signal arrives.
24 * In uclibc, it is identical to "new" struct kernel_sigaction
25 * (one from the Linux 2.1.68 kernel).
26 * This minimizes amount of translation in sigaction().
29 #ifdef __USE_POSIX199309
31 __sighandler_t sa_handler
;
32 void (*sa_sigaction
)(int, siginfo_t
*, void *);
33 } __sigaction_handler
;
34 # define sa_handler __sigaction_handler.sa_handler
35 # define sa_sigaction __sigaction_handler.sa_sigaction
37 __sighandler_t sa_handler
;
39 unsigned long sa_flags
;
40 void (*sa_restorer
)(void);
44 /* Bits in `sa_flags'. */
45 #define SA_NOCLDSTOP 1 /* Don't send SIGCHLD when children stop. */
46 #define SA_NOCLDWAIT 2 /* Don't create zombie on child death. */
47 #define SA_SIGINFO 4 /* Invoke signal-catching function with
48 three arguments instead of one. */
49 #if defined __USE_UNIX98 || defined __USE_MISC
50 # define SA_ONSTACK 0x08000000 /* Use signal stack by using `sa_restorer'. */
51 # define SA_RESTART 0x10000000 /* Restart syscall on signal return. */
52 # define SA_NODEFER 0x40000000 /* Don't automatically block the signal when
53 its handler is being executed. */
54 # define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler. */
57 # define SA_INTERRUPT 0x20000000 /* Historical no-op. */
59 /* Some aliases for the SA_ constants. */
60 # define SA_NOMASK SA_NODEFER
61 # define SA_ONESHOT SA_RESETHAND
62 # define SA_STACK SA_ONSTACK
65 /* Values for the HOW argument to `sigprocmask'. */
66 #define SIG_BLOCK 0 /* Block signals. */
67 #define SIG_UNBLOCK 1 /* Unblock signals. */
68 #define SIG_SETMASK 2 /* Set the set of blocked signals. */