/* 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>

#include <sigsetops.h>

#include <internal-signals.h>

/* Add SIGNO to SET.  */

int

sigaddset (sigset_t *set, int signo)

{

  if (set == NULL || signo <= 0 || signo >= NSIG

      || __is_internal_signal (signo))

    {

      __set_errno (EINVAL);

      return -1;

    }

  __sigaddset (set, signo);

  return 0;

}

libc_hidden_def (sigaddset)