1/* Set the disposition of SIG to SIG_IGN.
2 Copyright (C) 1998-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#define __need_NULL
21#include <stddef.h>
22#include <signal.h>
23#include <string.h> /* For the real memset prototype. */
24#include <sigsetops.h>
25
26int
27sigignore (int sig)
28{
29 struct sigaction act;
30
31 act.sa_handler = SIG_IGN;
32 __sigemptyset (&act.sa_mask);
33 act.sa_flags = 0;
34
35 return __sigaction (sig, &act, NULL);
36}
37

source code of glibc/sysdeps/posix/sigignore.c