pandorafms/extras/generic_daemon_launcher

#!/bin/sh

# **********************************************************************
# Generic Daemon launcher for Unix (AIX, HP-UX, SunOS, Linux)
# (c) 2008-2009 Artica ST
# (c) 2008-2009 Sancho Lerena <slerena@gmail.com>
# This code is licensed under GPL 2.0 license.
# **********************************************************************

PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
DAEMON="/home/slerena/code/pandora/trunk/extras/daemon_watchdog"

# This function replace pidof, not working in the same way in different linux distros

pidof_daemon () {
	COLUMNS=300
	OS_NAME=`uname -s`
	if [ $OS_NAME = "HP-UX" ]
	then
		A_PID=`ps -ex | grep "$DAEMON" | grep -v grep | head -1 | awk '{ print $1 }'`
	else
		A_PID=`ps -Af | grep "$DAEMON" | grep -v grep | head -1 | awk '{ print $2 }'`
	fi
	
	echo $A_PID
}

if [ ! -f $DAEMON ]
then
	echo "$DAEMON not found, please check setup. Exiting"
	exit
fi

case "$1" in
	start)
		A_PID=`pidof_daemon`
		if [ ! -z "$A_PID" ]
		then
			echo "$DAEMON is currently running on this machine with PID $A_PID"
			echo "Cannot launch again. Aborting."
			exit 1
		fi
		nohup $DAEMON 2> /dev/null > /dev/null & 
		sleep 2
		rm nohup.out 2> /dev/null
		
		A_PID=`pidof_daemon`
		if [ -z "$A_PID" ]
		then
			echo "Cannot start $DAEMON. Exitting"
			exit 1
		else
			echo "$DAEMON is now running with PID $A_PID"
		fi
	;;
	
	stop)
		A_PID=`pidof_daemon`
		if [ -z "$A_PID" ]
		then
			echo "$DAEMON is not running, cannot stop it. Aborting now..."
			exit 1
		else
			echo "Stopping $DAEMON"
			kill $A_PID > /dev/null 2>&1        
		fi
	;;

	status)
		A_PID=`pidof_daemon`	
		if [ -z "$A_PID" ]
		then
			echo "$DAEMON is not running."
		else
			echo "$DAEMON is running with PID $A_PID."
		fi
		exit 0
	;;

	force-reload|restart)
		$0 stop
		sleep 2
		$0 start
	;;
	
	*)
        echo "Uso: generic_daemon_launcher {start|stop|restart|status}"
        exit 1
esac