1 | /* Copyright (C) 1997-2020 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 <signal.h> |
19 | #include <nptl/pthreadP.h> /* SIGCANCEL, SIGSETXID */ |
20 | |
21 | /* Get and/or change the set of blocked signals. */ |
22 | int |
23 | __sigprocmask (int how, const sigset_t *set, sigset_t *oset) |
24 | { |
25 | sigset_t local_newmask; |
26 | |
27 | /* The only thing we have to make sure here is that SIGCANCEL and |
28 | SIGSETXID are not blocked. */ |
29 | if (set != NULL |
30 | && __glibc_unlikely (__sigismember (set, SIGCANCEL) |
31 | || __glibc_unlikely (__sigismember (set, SIGSETXID)))) |
32 | { |
33 | local_newmask = *set; |
34 | __sigdelset (&local_newmask, SIGCANCEL); |
35 | __sigdelset (&local_newmask, SIGSETXID); |
36 | set = &local_newmask; |
37 | } |
38 | |
39 | return INLINE_SYSCALL_CALL (rt_sigprocmask, how, set, oset, _NSIG / 8); |
40 | } |
41 | libc_hidden_def (__sigprocmask) |
42 | weak_alias (__sigprocmask, sigprocmask) |
43 | |