signal/sigdelset.c

   1 /* Copyright (C) 1991 Free Software Foundation, Inc.
   2 This file is part of the GNU C Library.
   3
   4 The GNU C Library is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 License, or (at your option) any later version.
   8
   9 The GNU C Library is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include "sigsetops.h"
  20
  21 /* Add SIGNO to SET.  */
  22 int
  23 DEFUN(sigdelset, (set, signo), sigset_t *set AND int signo)
  24 {
  25   if (set == NULL || signo <= 0 || signo >= NSIG)
  26     {
  27       errno = EINVAL;
  28       return -1;
  29     }
  30
  31   return __sigdelset (set, signo);
  32 }