/* Copyright (C) 1991-2018 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>

/* If SET is not NULL, modify the current set of blocked signals

   according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.

   If OSET is not NULL, store the old set of blocked signals in *OSET.  */

int

__sigprocmask (int how, const sigset_t *set, sigset_t *oset)

{

  switch (how)

    {

    case SIG_BLOCK:

    case SIG_UNBLOCK:

    case SIG_SETMASK:

      break;

    default:

      __set_errno (EINVAL);

      return -1;

    }

  __set_errno (ENOSYS);

  return -1;

}

/* No stub warning because abort calls __sigprocmask,

   and we don't want warnings for every use of abort on

   a system without safe signals.  */

libc_hidden_def (__sigprocmask)

weak_alias (__sigprocmask, sigprocmask)