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af69217f | 1 | /* Add SIG to the calling process' signal mask. |
dff8da6b | 2 | Copyright (C) 1998-2024 Free Software Foundation, Inc. |
af69217f | 3 | This file is part of the GNU C Library. |
af69217f UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
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. | |
af69217f UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
af69217f | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
af69217f | 18 | |
8619129f UD |
19 | #define __need_NULL |
20 | #include <stddef.h> | |
af69217f UD |
21 | #include <signal.h> |
22 | ||
23 | int | |
9d46370c | 24 | sighold (int sig) |
af69217f UD |
25 | { |
26 | sigset_t set; | |
27 | ||
d83da3a4 | 28 | sigemptyset (&set); |
89e28f65 | 29 | if (sigaddset (&set, sig) < 0) |
af69217f | 30 | return -1; |
d83da3a4 | 31 | return __sigprocmask (SIG_BLOCK, &set, NULL); |
af69217f | 32 | } |