elemental-ircd/src/ircd_signal.c

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/************************************************************************
* IRC - Internet Relay Chat, src/ircd_signal.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* 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 1, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: ircd_signal.c 6 2005-09-10 01:02:21Z nenolod $
*/
#include "stdinc.h"
#include "ircd_signal.h"
#include "ircd.h" /* dorehash */
#include "restart.h" /* server_reboot */
#include "s_log.h"
#include "memory.h"
#include "commio.h"
#include "s_conf.h"
#include "client.h"
#include "send.h"
/*
* dummy_handler - don't know if this is really needed but if alarm is still
* being used we probably will
*/
static void
dummy_handler(int sig)
{
/* Empty */
}
static void
sigchld_handler(int sig)
{
int status;
waitpid(-1, &status, WNOHANG);
}
/*
* sigterm_handler - exit the server
*/
static void
sigterm_handler(int sig)
{
/* XXX we had a flush_connections() here - we should close all the
* connections and flush data. read server_reboot() for my explanation.
* -- adrian
*/
ilog(L_MAIN, "Server killed By SIGTERM");
exit(-1);
}
/*
* sighup_handler - reread the server configuration
*/
static void
sighup_handler(int sig)
{
dorehash = 1;
}
/*
* sigusr1_handler - reread the motd file
*/
static void
sigusr1_handler(int sig)
{
doremotd = 1;
}
static void
sigusr2_handler(int sig)
{
dorehashbans = 1;
}
/*
* sigint_handler - restart the server
*/
static void
sigint_handler(int sig)
{
static int restarting = 0;
if(server_state_foreground)
{
ilog(L_MAIN, "Server exiting on SIGINT");
exit(0);
}
else
{
ilog(L_MAIN, "Server Restarting on SIGINT");
if(restarting == 0)
{
restarting = 1;
server_reboot();
}
}
}
/*
* setup_signals - initialize signal handlers for server
*/
void
setup_signals()
{
struct sigaction act;
act.sa_flags = 0;
act.sa_handler = SIG_IGN;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask, SIGPIPE);
sigaddset(&act.sa_mask, SIGALRM);
#ifdef SIGTRAP
sigaddset(&act.sa_mask, SIGTRAP);
#endif
# ifdef SIGWINCH
sigaddset(&act.sa_mask, SIGWINCH);
sigaction(SIGWINCH, &act, 0);
# endif
sigaction(SIGPIPE, &act, 0);
#ifdef SIGTRAP
sigaction(SIGTRAP, &act, 0);
#endif
act.sa_handler = dummy_handler;
sigaction(SIGALRM, &act, 0);
act.sa_handler = sighup_handler;
sigemptyset(&act.sa_mask);
sigaddset(&act.sa_mask, SIGHUP);
sigaction(SIGHUP, &act, 0);
act.sa_handler = sigint_handler;
sigaddset(&act.sa_mask, SIGINT);
sigaction(SIGINT, &act, 0);
act.sa_handler = sigterm_handler;
sigaddset(&act.sa_mask, SIGTERM);
sigaction(SIGTERM, &act, 0);
act.sa_handler = sigusr1_handler;
sigaddset(&act.sa_mask, SIGUSR1);
sigaction(SIGUSR1, &act, 0);
act.sa_handler = sigusr2_handler;
sigaddset(&act.sa_mask, SIGUSR2);
sigaction(SIGUSR2, &act, 0);
act.sa_handler = sigchld_handler;
sigaddset(&act.sa_mask, SIGCHLD);
sigaction(SIGCHLD, &act, 0);
}