#4 Daemonization possibilities

[Anonymous]

Please include daemonization possibilities to new versions. I'd like to start igmpproxy from rc.local scripts at system startup.

[Leonid Lisovskiy]

I can provide daemonize patch used myself:

diff -urBp igmpproxy.orig/src/igmpproxy.c igmpproxy/src/igmpproxy.c
--- igmpproxy.orig/src/igmpproxy.c 2009-09-15 19:25:13.000000000 +0400
+++ igmpproxy/src/igmpproxy.c 2009-09-15 19:56:19.000000000 +0400
@@ -126,6 +126,20 @@ int main( int ArgCn, char *ArgVc[] ) {
break;
}

+ if ( !Log2Stderr ) {
+
+ // Only daemon goes past this line...
+ if (fork()) exit(0);
+
+ // Detach daemon from terminal
+ if ( close( 0 ) < 0 || close( 1 ) < 0 || close( 2 ) < 0
+ || open( "/dev/null", 0 ) != 0 || dup2( 0, 1 ) < 0 || dup2( 0, 2 ) < 0
+ || setpgrp() < 0
+ ) {
+ my_log( LOG_ERR, errno, "failed to detach daemon" );
+ }
+ }
+
// Go to the main loop.
igmpProxyRun();

[Anonymous]

The program can be run in background (from rc.local scripts) without any modifications to the original code. It also can create pid file (might be useful for killing, monitoring the daemon easier) when used with start-stop-daemon. Here's mine:

#!/bin/bash
### BEGIN INIT INFO
# Provides: igmpproxy
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2
# Default-Stop: 1
# Short-Description: IP-TV multicast routing daemon
### END INIT INFO
#
# (c) hid3nax, 2o1o
#

PATH=/sbin:/bin:/usr/sbin:/usr/local/sbin:/usr/bin
DAEMON=/usr/local/sbin/igmpproxy
NAME=igmpproxy
DESC="IP-TV routing daemon"
PIDFILE="/var/run/$NAME.pid"
PNAME="igmpproxy"
DOPTIONS=""
CONF="/etc/igmpproxy.conf"

test -x $DAEMON || exit 0

test -r $CONF || exit 0

case "$1" in
start)
echo -n "Starting $DESC: "
start-stop-daemon --start --make-pidfile --pidfile $PIDFILE --background --exec $DAEMON $DOPTIONS $CONF

echo "$NAME."
;;
stop)
echo -n "Stopping $DESC: "

start-stop-daemon --stop --pidfile $PIDFILE --name $PNAME --oknodo

echo "$NAME."
;;
restart)
echo -n "Restarting $DESC: "
start-stop-daemon --stop --pidfile $PIDFILE --name $PNAME --retry 5 --oknodo
start-stop-daemon --start --make-pidfile --pidfile $PIDFILE --background --exec $DAEMON $DOPTIONS $CONF

echo "$NAME."
;;
*)
echo "Usage: /etc/init.d/${0##*/} {start|stop|restart}" >&2
exit 1
;;
esac

exit 0

[Leonid Lisovskiy]

There is no start-stop-daemon on most embedded platforms.