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 | |
21 | |
22 | /* If SET is not NULL, modify the current set of blocked signals |
23 | according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK. |
24 | If OSET is not NULL, store the old set of blocked signals in *OSET. */ |
25 | int |
26 | __sigprocmask (int how, const sigset_t *set, sigset_t *oset) |
27 | { |
28 | switch (how) |
29 | { |
30 | case SIG_BLOCK: |
31 | case SIG_UNBLOCK: |
32 | case SIG_SETMASK: |
33 | break; |
34 | default: |
35 | __set_errno (EINVAL); |
36 | return -1; |
37 | } |
38 | |
39 | __set_errno (ENOSYS); |
40 | return -1; |
41 | } |
42 | |
43 | /* No stub warning because abort calls __sigprocmask, |
44 | and we don't want warnings for every use of abort on |
45 | a system without safe signals. */ |
46 | |
47 | libc_hidden_def (__sigprocmask) |
48 | weak_alias (__sigprocmask, sigprocmask) |
49 | |