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glibc  2.9
sigignore.c
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00001 /* Set the disposition of SIG to SIG_IGN.
00002    Copyright (C) 1998, 2005 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <errno.h>
00022 #define __need_NULL
00023 #include <stddef.h>
00024 #include <signal.h>
00025 #include <string.h>  /* For the real memset prototype.  */
00026 
00027 
00028 int
00029 sigignore (sig)
00030      int sig;
00031 {
00032   struct sigaction act;
00033 
00034   act.sa_handler = SIG_IGN;
00035   if (__sigemptyset (&act.sa_mask) < 0)
00036     return -1;
00037   act.sa_flags = 0;
00038 
00039   return __sigaction (sig, &act, NULL);
00040 }