signal/sigaddset.c

   1 /* Copyright (C) 1991, 1996 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 not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include "sigsetops.h"
  20
  21 /* Add SIGNO to SET.  */
  22 int
  23 sigaddset (set, signo)
  24      sigset_t *set;
  25      int signo;
  26 {
  27   if (set == NULL || signo <= 0 || signo >= NSIG)
  28     {
  29       __set_errno (EINVAL);
  30       return -1;
  31     }
  32
  33   return __sigaddset (set, signo);
  34 }