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1/* Copyright (C) 1997-2019 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 <http://www.gnu.org/licenses/>. */
17
18#include <errno.h>
19#include <signal.h>
20#include <string.h> /* Needed for string function builtin redirection. */
21#include <unistd.h>
22
23#include <sysdep.h>
24#include <sys/syscall.h>
25
26#include <nptl/pthreadP.h> /* SIGCANCEL, SIGSETXID */
27
28
29/* Get and/or change the set of blocked signals. */
30int
31__sigprocmask (int how, const sigset_t *set, sigset_t *oset)
32{
33 sigset_t local_newmask;
34
35 /* The only thing we have to make sure here is that SIGCANCEL and
36 SIGSETXID are not blocked. */
37 if (set != NULL
38 && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
39 || __builtin_expect (__sigismember (set, SIGSETXID), 0)))
40 {
41 local_newmask = *set;
42 __sigdelset (&local_newmask, SIGCANCEL);
43 __sigdelset (&local_newmask, SIGSETXID);
44 set = &local_newmask;
45 }
46
47 return INLINE_SYSCALL (rt_sigprocmask, 4, how, set, oset, _NSIG / 8);
48}
49libc_hidden_def (__sigprocmask)
50weak_alias (__sigprocmask, sigprocmask)
51

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