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 | #include <errno.h> |
19 | #include <signal.h> |
20 | #include <stddef.h> |
21 | #include <unistd.h> |
22 | |
23 | |
24 | /* Change the set of blocked signals to SET, |
25 | wait until a signal arrives, and restore the set of blocked signals. */ |
26 | int |
27 | __sigsuspend (const sigset_t *set) |
28 | { |
29 | sigset_t oset; |
30 | int save; |
31 | |
32 | if (set == NULL) |
33 | { |
34 | __set_errno (EINVAL); |
35 | return -1; |
36 | } |
37 | |
38 | if (sigprocmask (SIG_SETMASK, set: set, oset: &oset) < 0) |
39 | return -1; |
40 | |
41 | (void) pause(); |
42 | save = errno; |
43 | |
44 | if (sigprocmask (SIG_SETMASK, set: &oset, oset: (sigset_t *) NULL) < 0) |
45 | return -1; |
46 | |
47 | __set_errno (save); |
48 | return -1; |
49 | } |
50 | libc_hidden_def (__sigsuspend) |
51 | weak_alias (__sigsuspend, sigsuspend) |
52 | |