1 /* Copyright (C) 1991,96,2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
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.
8
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.
13
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/>. */
17
18 #define __need_NULL
19 #include <stddef.h>
20 #include <signal.h>
21 #include <errno.h>
22
23 /* Return 1 if SIGNO is in SET, 0 if not. */
sigismember(const sigset_t * set,int signo)24 int sigismember (const sigset_t *set, int signo)
25 {
26 if (set == NULL || signo <= 0 || signo >= NSIG)
27 {
28 __set_errno (EINVAL);
29 return -1;
30 }
31
32 return __sigismember (set, signo);
33 }
34