signal/sigandset.c

   1 /* Copyright (C) 1991, 1996, 1997 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <errno.h>
  20 #include <signal.h>
  21 #define __need_NULL
  22 #include <stddef.h>
  23
  24 /* Combine sets LEFT and RIGHT by logical AND and place result in DEST.  */
  25 int
  26 sigandset (dest, left, right)
  27      sigset_t *dest;
  28      const sigset_t *left;
  29      const sigset_t *right;
  30 {
  31   if (dest == NULL || left == NULL || right == NULL)
  32     {
  33       __set_errno (EINVAL);
  34       return -1;
  35     }
  36
  37   return __sigandset (dest, left, right);
  38 }