signal.c

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/*
 *  $Id: signal.c,v 1.3 2005/12/16 23:33:35 ghost666 Exp $
 *
 *  rssbgr - RSS backgroud reader
 *  Copyright (C) 2005 Piotr 'GhosT' Wydrych
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#include "signal.h"

void set_signal_handlers(void)
{
 DEBUG2("set_signal_handlers: start; i_am = %d", i_am)
 struct sigaction sa;
 sa.sa_handler = catch_signal;
 sigemptyset(&sa.sa_mask);
 sa.sa_flags =0;
 if (!sigaction(SIGHUP, &sa, NULL) == -1) DIE("Couldn't set a trap for SIGHUP")
 if (!sigaction(SIGTERM, &sa, NULL) == -1) DIE("Couldn't set a trap for SIGTERM")
 DEBUG2("set_signal_handlers: end; i_am = %d", i_am)
}

/* --------- */

void catch_signal(int sig)
{
 DEBUG3("catch_signal: i_am = %d; sig = %d", i_am, sig)
 unlink(lockfile);
 if (sig == SIGTERM)
 {
  if (i_am == I_AM_CHILD)
   DEBUG1("Child ends after a SIGTERM.")
  else
   DEBUG1("Granchild ends after a SIGTERM.")
  _exit(15);
 }
}

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