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/*

 *  3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  sigdelset.c,v 1.5 2002/01/04 18:28:24 joel Exp

 */

#if HAVE_CONFIG_H

#include "config.h"

#endif

#include <pthread.h>

#include <errno.h>

#include <rtems/system.h>

#include <rtems/posix/pthread.h>

#include <rtems/posix/psignal.h>

#include <rtems/seterr.h>

/*

 *  3.3.3 Manipulate Signal Sets, P1003.1b-1993, p. 69

 */

int sigdelset(

  sigset_t   *set,

  int         signo

)

{

  if ( !set )

    rtems_set_errno_and_return_minus_one( EINVAL );

  if ( !signo )

    return 0;

  if ( !is_valid_signo(signo) )

    rtems_set_errno_and_return_minus_one( EINVAL );

  *set &= ~signo_to_mask(signo);

  return 0;

}