| /* Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #include <string.h> /* Needed for string function builtin redirection. */ |
| #include <unistd.h> |
| |
| #include <sysdep.h> |
| #include <sys/syscall.h> |
| |
| #include <nptl/pthreadP.h> /* SIGCANCEL, SIGSETXID */ |
| |
| |
| /* Get and/or change the set of blocked signals. */ |
| int |
| __sigprocmask (int how, const sigset_t *set, sigset_t *oset) |
| { |
| sigset_t local_newmask; |
| |
| /* The only thing we have to make sure here is that SIGCANCEL and |
| SIGSETXID are not blocked. */ |
| if (set != NULL |
| && (__builtin_expect (__sigismember (set, SIGCANCEL), 0) |
| || __builtin_expect (__sigismember (set, SIGSETXID), 0))) |
| { |
| local_newmask = *set; |
| __sigdelset (&local_newmask, SIGCANCEL); |
| __sigdelset (&local_newmask, SIGSETXID); |
| set = &local_newmask; |
| } |
| |
| return INLINE_SYSCALL (rt_sigprocmask, 4, how, set, oset, _NSIG / 8); |
| } |
| libc_hidden_def (__sigprocmask) |
| weak_alias (__sigprocmask, sigprocmask) |
