1 /* Copyright (C) 1992,1994,1995,1996,1997,2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
24 /* If ACT is not NULL, change the action for SIG to *ACT.
25 If OACT is not NULL, put the old action for SIG in *OACT. */
27 __sigaction (sig, act, oact)
29 const struct sigaction *act;
30 struct sigaction *oact;
35 if (sig <= 0 || sig >= NSIG)
45 /* Race condition, but this is the only way to do it. */
46 handler = signal (sig, SIG_IGN);
47 if (handler == SIG_ERR)
50 (void) signal (sig, handler);
57 if (act->sa_flags != 0)
64 for (i = 1; i < NSIG; ++i)
65 if (__sigismember (&act->sa_mask, i))
68 handler = signal (sig, act->sa_handler);
69 if (handler == SIG_ERR)
75 oact->sa_handler = handler;
76 __sigemptyset (&oact->sa_mask);
82 libc_hidden_def (__sigaction)
83 weak_alias (__sigaction, sigaction)