1/* Copyright (C) 2002-2023 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 <pthreadP.h>
20#include <sysdep.h>
21#include <shlib-compat.h>
22
23int
24__pthread_sigmask (int how, const sigset_t *newmask, sigset_t *oldmask)
25{
26 sigset_t local_newmask;
27
28 /* The only thing we have to make sure here is that SIGCANCEL and
29 SIGSETXID is not blocked. */
30 if (newmask != NULL
31 && (__glibc_unlikely (__sigismember (newmask, SIGCANCEL))
32 || __glibc_unlikely (__sigismember (newmask, SIGSETXID))))
33 {
34 local_newmask = *newmask;
35 clear_internal_signals (&local_newmask);
36 newmask = &local_newmask;
37 }
38
39 /* We know that realtime signals are available if NPTL is used. */
40 int result = INTERNAL_SYSCALL_CALL (rt_sigprocmask, how, newmask,
41 oldmask, __NSIG_BYTES);
42
43 return (INTERNAL_SYSCALL_ERROR_P (result)
44 ? INTERNAL_SYSCALL_ERRNO (result)
45 : 0);
46}
47libc_hidden_def (__pthread_sigmask)
48
49versioned_symbol (libc, __pthread_sigmask, pthread_sigmask, GLIBC_2_32);
50#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_32)
51strong_alias (__pthread_sigmask, __pthread_sigmask_2);
52compat_symbol (libc, __pthread_sigmask_2, pthread_sigmask, GLIBC_2_0);
53#endif
54