Linux operation and maintenance --- nginx script to add system services

#!/bin/bash
#chkconfig: 345 85 15 
# description: Nginx is an HTTP(S) server, HTTP(S) reverse
set -e
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DESC="nginx daemon"
NAME=nginx
DAEMON=/usr/local/nginx/sbin/$NAME
SCRIPTNAME=/etc/init.d/$NAME
test -x $DAEMON || exit 0
d_start(){
$DAEMON || echo -n " already running"
}
d_stop() {
$DAEMON -s quit || echo -n " not running"
}
d_reload() {
$DAEMON -s reload || echo -n " counld not reload"
}
case "$1" in
start)
echo -n "Starting $DESC:$NAME"
d_start
echo "."
;;
stop)
echo -n "Stopping $DESC:$NAME"
d_stop
echo "."
;;
reload)
echo -n "Reloading $DESC configuration..."
d_reload
echo "reloaded."
;;
restart)
echo -n "Restarting $DESC: $NAME"
d_stop
sleep 2
d_start
echo "."
;;
*)
echo "Usage: $SCRIPTNAME {start|stop|restart|reload}" >&2
exit 3
;;
esac
exit 0