1 /* Copyright (C) 1991, 1996, 2003 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 /* Add SIGNO to SET.  */
24 int
sigaddset(sigset_t * set,int signo)25 sigaddset (sigset_t *set, int signo)
26 {
27   if (set == NULL || signo <= 0 || signo >= NSIG)
28     {
29       __set_errno (EINVAL);
30       return -1;
31     }
32 
33   __sigaddset (set, signo);
34   return 0;
35 }
36 libc_hidden_def(sigaddset)
37