1/* Copyright (C) 1991-2023 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 <https://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <signal.h>
20#include <stddef.h>
21#include <sigsetops.h>
22
23/* Return 1 if SIGNO is in SET, 0 if not. */
24int
25sigismember (const 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 return __sigismember (set, signo);
34}
35libc_hidden_def (sigismember)
36