nginx Linux Service Wrapper Script (RHEL / Redhat based)

nginx

#!/bin/bash
#
# nginx		Start up the Nginx HTTP Reverse Proxy
#
# chkconfig:     2345 55 25

### BEGIN INIT INFO
# Provides:          nginx
# Required-Start:    $remote_fs $network $syslog
# Required-Stop:     $remote_fs $syslog
# Should-Start:      $syslog
# Should-Stop:       $network $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start up the Nginx HTTP Reverse Proxy server daemon
# Description:       Nginx is a free, open-source, high-performance HTTP server and reverse proxy
#                    This service starts up the Nginx HTTP Reverse Proxy.
### END INIT INFO

# source function library
. /etc/rc.d/init.d/functions

# pull in sysconfig settings
[ -f /etc/sysconfig/nginx ] && . /etc/sysconfig/nginx

RETVAL=0
prog="nginx"
lockfile=/var/lock/subsys/$prog

# Some functions to make the below more readable
APPRUN=/usr/local/nginx/sbin/nginx
CONFIG=/usr/local/nginx/conf/nginx.conf
PIDFILE=/usr/local/nginx/logs/nginx.pid

runlevel=$(set -- $(runlevel); eval "echo \$$#" )

start()
{
	[ -x $APPRUN ] || exit 5
	[ -f $CONFIG ] || exit 6

	echo -n $"Starting $prog: "
	$APPRUN && success || failure
	RETVAL=$?
	[ $RETVAL -eq 0 ] && touch $lockfile
	echo
	return $RETVAL
}

stop()
{
	echo -n $"Stopping $prog: "
	killproc -p $PIDFILE $APPRUN
	RETVAL=$?
	# if we are in halt or reboot runlevel kill all running sessions
	# so the TCP connections are closed cleanly
	if [ "x$runlevel" = x0 -o "x$runlevel" = x6 ] ; then
	    trap '' TERM
	    killall $prog 2>/dev/null
	    trap TERM
	fi
	[ $RETVAL -eq 0 ] && rm -f $lockfile
	echo
}

reload()
{
	echo -n $"Reloading $prog: "
	killproc -p $PIDFILE $APPRUN -HUP
	RETVAL=$?
	echo
}

restart() {
	stop
	start
}

rh_status() {
	status -p $PIDFILE $prog
}

rh_status_q() {
	rh_status >/dev/null 2>&1
}

case "$1" in
	start)
		rh_status_q && exit 0
		start
		;;
	stop)
		if ! rh_status_q; then
			rm -f $lockfile
			exit 0
		fi
		stop
		;;
	restart)
		restart
		;;
	reload)
		rh_status_q || exit 7
		reload
		;;
	force-reload)
		restart
		;;
	status)
		rh_status
		RETVAL=$?
		if [ $RETVAL -eq 3 -a -f $lockfile ] ; then
			RETVAL=2
		fi
		;;
	*)
		echo $"Usage: $0 {start|stop|restart|reload|force-reload|status}"
		RETVAL=2
esac
exit $RETVAL