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[glibc.git] / signal / sigaddset.c
blob055e45f6c96c93202128962ee8c0d679d39d2cbb
1 /* Copyright (C) 1991, 1996 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 Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include "sigsetops.h"
21 /* Add SIGNO to SET. */
22 int
23 sigaddset (set, signo)
24 sigset_t *set;
25 int signo;
27 if (set == NULL || signo <= 0 || signo >= NSIG)
29 __set_errno (EINVAL);
30 return -1;
33 return __sigaddset (set, signo);