1/* Linux pause syscall implementation.
2 Copyright (C) 2017-2023 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 <signal.h>
20#include <unistd.h>
21#include <sysdep-cancel.h>
22
23/* Suspend the process until a signal arrives.
24 This always returns -1 and sets errno to EINTR. */
25int
26__libc_pause (void)
27{
28#ifdef __NR_pause
29 return SYSCALL_CANCEL (pause);
30#else
31 return SYSCALL_CANCEL (ppoll, NULL, 0, NULL, NULL);
32#endif
33}
34weak_alias (__libc_pause, pause)
35