#!/bin/bash
#
# chkconfig: 2345 99 15
# description: Fast web-server and reverse proxy
# processname: /usr/sbin/nginx
# pidfile: /var/run/nginx.pid

# source function library

WITHOUT_RC_COMPAT=1

. /etc/init.d/functions

LOCKFILE=/var/lock/nginx/nginx
PIDFILE=/var/run/nginx.pid
OLDBINPID=/var/run/nginx.pid.oldbin
RETVAL=0

SourceIfExists /etc/sysconfig/nginx

start()
{
	# nginx can work with many files at one time
	[ -n "$ULIMIT_ARGS" ] && ulimit $ULIMIT_ARGS
	start_daemon --pidfile "$PIDFILE" --lockfile "$LOCKFILE" --expect-user root -- nginx
	RETVAL=$?
	return $RETVAL
}

stop()
{
	stop_daemon --pidfile "$PIDFILE" --lockfile "$LOCKFILE" --expect-user root -- nginx
	RETVAL=$?
	return $RETVAL
	rm -f $PIDFILE
}

restart()
{
	# start _new_ nginx binary
	# !!! warning !!! when ser rtsig, it may not working
#	msg_reloading nginx
#	stop_daemon --expect-user root -USR2 -- nginx
	conftest || exit $?
	stop
	start
	RETVAL=$?
	return $RETVAL
}

reload()
{
	conftest || exit $?
	msg_reloading nginx
	stop_daemon --pidfile "$PIDFILE" --expect-user root -HUP -- nginx
	RETVAL=$?
	return $RETVAL
} 

conftest()
{
	action "Checking configuration sanity for nginx: " nginx -t
	RETVAL=$?
	return $RETVAL
}

waitpidfile()
{
		[ -z "$1" ] && exit 1
		MAXCOUNT=50
		counter=0
		until [ -s "$1" ]; do
				[ "$((counter++))" -eq "$MAXCOUNT" ] && break
				usleep 100000
		done
}

upgrade()
{
	conftest || return 1
	status --lockfile "$LOCKFILE" --pidfile "$PIDFILE" --expect-user root -- nginx >&/dev/null || return 0
	echo -n "Upgrading running nginx binary: "
	stop_daemon --pidfile "$PIDFILE" --expect-user root -USR2 -- nginx && {
		echo -n "Phasing out older nginx instance: "
		waitpidfile "$OLDBINPID"
		stop_daemon --pidfile "$OLDBINPID" --expect-user root --no-announce -- nginx
	} || return 1
}

# See how we were called.
case "$1" in
	start)
		conftest
		RETVAL=$?
		[ $RETVAL -eq 0 ] && start ||:
		;;
	stop)
		stop
		;;
	reload) 
		conftest
		RETVAL=$?
		[ $RETVAL -eq 0 ] && reload ||:
		;;
	restart)
		restart
		;;
	condstop)
		if [ -e "$LOCKFILE" ]; then
			stop
		fi
		;;
	condrestart)
		# package upgrade should invoke upgrade();
		# sysadmin doing condrestart by hand
		# should invoke restart() if nginx's running.
		# see also manual/triggers in rpm docs
		# and /usr/sbin/post_service
		if ! [ "$RPM_INSTALL_ARG1" -ge 0 ] 2>/dev/null; then
			if [ -e "$LOCKFILE" ]; then
				restart
			fi
			exit 0
		fi
		if [ "$RPM_INSTALL_ARG1" -gt 1 ]; then
			upgrade
		fi
		;;
	condreload)
		if [ -e "$LOCKFILE" ]; then
			reload
		fi
		;;
	status)
		status --lockfile "$LOCKFILE" --pidfile "$PIDFILE" --expect-user root -- nginx
		RETVAL=$?
		;;
	upgrade)
		if [ -e "$LOCKFILE" ]; then
			upgrade
		fi
		;;
	rotate)
		msg_reloading nginx
		stop_daemon --pidfile "$PIDFILE" --expect-user root -USR1 -- nginx
		RETVAL=$?
		;;		
	*)
		msg_usage "nginx {start|stop|reload|restart|condstop|condrestart|condreload|status|rotate}"
		RETVAL=1
esac

exit $RETVAL