Installation von Tiny Tiny RSS/Start-Stop-Skript

#!/bin/sh
#
# starts "Tiny Tiny Rss"ses update daemon
# put it into /usr/local/etc/rc.d/
# chmod 755 on it

DM_CMD="/usr/bin/php /var/services/web/ttrss/update.php --daemon"
getPID ()
{
	ps|grep "$DM_CMD"|grep -v grep|awk '{print $1}'
	return $?
}

start_daemon () {
	su -m nobody -c "(trap '' SIGHUP SIGINT SIGQUIT && $DM_CMD >> /dev/null 2>&1) &"
	return $?
} 

reset_crond () {
	ps |grep /usr/sbin/crond|grep -v grep|awk '{print $1}'|xargs kill -HUP
	return $?
}

cronLine="*	*	*	*	*	root	"`realpath $0`" cron"

case $1 in
start)
	start_daemon
	stat=`getPID`
	if [ -z "$stat" ]; then
		echo "$cronLine" >> /etc/crontab
		reset_crond
	fi
	;;
stop)
	echo `getPID`|xargs kill
	;;
cron)
	stat=`getPID`
	if [ -z "$stat" ]; then
		start_daemon
	fi
	sed -i -e "\\%$cronLine% d" /etc/crontab
	reset_crond
	;;
*)
	echo "Wrong argument. Usage: $0 start|stop"
	;;
esac