1/* Copyright (C) 1991-2022 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#define sigpause __rename_sigpause
19#include <errno.h>
20#include <signal.h>
21#include <stddef.h> /* For NULL. */
22#undef sigpause
23
24#include <sigset-cvt-mask.h>
25#include <sysdep-cancel.h>
26
27int
28__sigpause (int sig_or_mask, int is_sig)
29{
30 sigset_t set;
31
32 if (is_sig != 0)
33 {
34 /* The modern X/Open implementation is requested. */
35 if (__sigprocmask (0, NULL, &set) < 0
36 || sigdelset (&set, sig_or_mask) < 0)
37 return -1;
38 }
39 else if (sigset_set_old_mask (&set, sig_or_mask) < 0)
40 return -1;
41
42 /* Note the sigpause() is a cancellation point. But since we call
43 sigsuspend() which itself is a cancellation point we do not have
44 to do anything here. */
45 return __sigsuspend (&set);
46}
47libc_hidden_def (__sigpause)
48
49/* We have to provide a default version of this function since the
50 standards demand it. The version which is a bit more reasonable is
51 the BSD version. So make this the default. */
52int
53__attribute__ ((weak))
54__default_sigpause (int mask)
55{
56 return __sigpause (mask, 0);
57}
58#undef sigpause
59weak_alias (__default_sigpause, sigpause)
60strong_alias (__default_sigpause, __libc_sigpause)
61
62
63/* We have to provide a default version of this function since the
64 standards demand it. The version which is a bit more reasonable is
65 the BSD version. So make this the default. */
66int
67__attribute__ ((weak))
68__xpg_sigpause (int sig)
69{
70 return __sigpause (sig, 1);
71}
72strong_alias (__xpg_sigpause, __libc___xpg_sigpause)
73

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