sysdeps/posix/sigignore.c

   1 /* Set the disposition of SIG to SIG_IGN.
   2    Copyright (C) 1998, 2005 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <errno.h>
  22 #define __need_NULL
  23 #include <stddef.h>
  24 #include <signal.h>
  25 #include <string.h>     /* For the real memset prototype.  */
  26
  27
  28 int
  29 sigignore (sig)
  30      int sig;
  31 {
  32   struct sigaction act;
  33
  34   act.sa_handler = SIG_IGN;
  35   if (__sigemptyset (&act.sa_mask) < 0)
  36     return -1;
  37   act.sa_flags = 0;
  38
  39   return __sigaction (sig, &act, NULL);
  40 }