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. */
22int
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}
41libc_hidden_def (__sigprocmask)
42weak_alias (__sigprocmask, sigprocmask)
43