/* 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)