I am using nginx on redhat for a very long time, I found a service script, installed nginx as a service to redhat, it is fine.
but I found a bug, that after dirty shutdown, nginx service can not auto start, and i only start it by hand.
please help me, blow is the service script:

#!/bin/bash
# nginx Startup script for the Nginx HTTP Server
# this script create it by jackbillow at 2007.10.15.
# it is v.0.0.2 version.
# if you find any errors on this scripts,please contact jackbillow.
# and send mail to jackbillow at gmail dot com.
# chkconfig: - 85 15
# description: Nginx is a high-performance web and proxy server.
# It has a lot of features, but it's not for everyone.
# processname: nginx
# pidfile: /usr/local/webserver/nginx/logs/nginx.pid
# config: /usr/local/webserver/nginx/conf/nginx.conf

nginx=/usr/local/webserver/nginx/sbin/nginx
nginx_config=/usr/local/webserver/nginx/conf/nginx.conf
nginx_pid=/usr/local/webserver/nginx/logs/nginx.pid

RETVAL=0
prog="nginx"

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

# Source networking configuration.
. /etc/sysconfig/network

# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0

[ -x $nginx ] || exit 0


# Start nginx daemons functions.
start() {

if [ -e $nginx_pid ];then
echo "nginx already running...."
exit 1
fi

echo -n $"Starting $prog: "
daemon $nginx -c ${nginx_config}
RETVAL=$?
echo
[ $RETVAL = 0 ] && touch /var/lock/subsys/nginx
return $RETVAL

}


# Stop nginx daemons functions.
stop() {
echo -n $"Stopping $prog: "
killproc $nginx
RETVAL=$?
echo
[ $RETVAL = 0 ] && rm -f /var/lock/subsys/nginx /usr/local/webserver/nginx/logs/nginx.pid
}


# reload nginx service functions.
reload() {

echo -n $"Reloading $prog: "
#kill -HUP `cat ${nginx_pid}`
killproc $nginx -HUP
RETVAL=$?
echo

}

# See how we were called.
case "$1" in
start)
start
;;

stop)
stop
;;

reload)
reload
;;

restart)
stop
start
;;

status)
status $prog
RETVAL=$?
;;
*)
echo $"Usage: $prog {start|stop|restart|reload|status|help}"
exit 1
esac

exit $RETVAL