1/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
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.
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
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <signal.h>
20#include <pthreadP.h>
21#include <sysdep.h>
22#include <shlib-compat.h>
23
24int
25__pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
26{
27 sigset_t local_newmask;
28
29 /* The only thing we have to make sure here is that SIGCANCEL and
30 SIGSETXID is not blocked. */
31 if (newmask != NULL
32 && (__glibc_unlikely (__sigismember (newmask, SIGCANCEL))
33 || __glibc_unlikely (__sigismember (newmask, SIGSETXID))))
34 {
35 local_newmask = *newmask;
36 __clear_internal_signals (&local_newmask);
37 newmask = &local_newmask;
38 }
39
40 /* We know that realtime signals are available if NPTL is used. */
41 int result = INTERNAL_SYSCALL_CALL (rt_sigprocmask, how, newmask,
42 oldmask, __NSIG_BYTES);
43
44 return (INTERNAL_SYSCALL_ERROR_P (result)
45 ? INTERNAL_SYSCALL_ERRNO (result)
46 : 0);
47}
48libc_hidden_def (__pthread_sigmask)
49
50versioned_symbol (libc, __pthread_sigmask, pthread_sigmask, GLIBC_2_32);
51#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32)
52strong_alias (__pthread_sigmask, __pthread_sigmask_2);
53compat_symbol (libc, __pthread_sigmask_2, pthread_sigmask, GLIBC_2_0);
54#endif
55