1 /* BSD-like signal function.
2 Copyright (C) 1991,1992,1996,1997,2000,2002,2005
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 #include <string.h> /* For the real memset prototype. */
25 libc_hidden_proto(sigaction)
27 sigset_t _sigintr attribute_hidden; /* Set by siginterrupt. */
29 /* Set the handler for the signal SIG to HANDLER,
30 returning the old handler, or SIG_ERR on error. */
31 extern __typeof(bsd_signal) __bsd_signal;
32 attribute_hidden __sighandler_t
33 __bsd_signal (int sig, __sighandler_t handler)
35 struct sigaction act, oact;
37 /* Check signal extents to protect __sigismember. */
38 if (handler == SIG_ERR || sig < 1 || sig >= NSIG)
44 act.sa_handler = handler;
45 if (__sigemptyset (&act.sa_mask) < 0
46 || __sigaddset (&act.sa_mask, sig) < 0)
48 act.sa_flags = __sigismember (&_sigintr, sig) ? 0 : SA_RESTART;
49 if (sigaction (sig, &act, &oact) < 0)
52 return oact.sa_handler;
54 strong_alias(__bsd_signal,bsd_signal)
55 libc_hidden_proto(signal)
56 strong_alias(__bsd_signal,signal)
57 libc_hidden_def(signal)