1/* Linux pause syscall implementation.
2 Copyright (C) 2017-2018 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 <http://www.gnu.org/licenses/>. */
18
19#include <signal.h>
20#include <unistd.h>
21#include <sysdep-cancel.h>
22#include <not-cancel.h>
23
24/* Suspend the process until a signal arrives.
25 This always returns -1 and sets errno to EINTR. */
26int
27__libc_pause (void)
28{
29#ifdef __NR_pause
30 return SYSCALL_CANCEL (pause);
31#else
32 return SYSCALL_CANCEL (ppoll, NULL, 0, NULL, NULL);
33#endif
34}
35weak_alias (__libc_pause, pause)
36
37int
38__pause_nocancel (void)
39{
40#ifdef __NR_pause
41 return INLINE_SYSCALL_CALL (pause);
42#else
43 return INLINE_SYSCALL_CALL (ppoll, NULL, 0, NULL, NULL);
44#endif
45}
46libc_hidden_def (__pause_nocancel)
47