模拟Nginx服务启动关闭是怎样的

已知Nginx管理命令为：

启动：/application/nginx/sbin/nginx

停止：/application/nginx/sbin/nginx -s stop

重新加载：/application/nginx/sbin/nginx -s reload

请用case脚本模拟Nginx服务启动关闭：

/etc/init.d/nginx {start|stop|reload|restart}，并可通过chkconfig管理。

[root@web01 ~]# cat /etc/init.d/nginx
#/bin/sh
# chkconfig: 2345 15 62 #设定运行级别以及启动和停止Nginx服务顺序
# description: Nginx Server #脚本说明

[ -f /etc/init.d/functions]&&. /etc/init.d/functions||exit 1

#Define Arivables
Path=/application/nginx/sbin/nginx
RETVAL=0

#Define Start Function
start() {
if [ `ss -lntup|grep nginx|wc -l` -gt 0];then
echo "Nginx is Running..."
else
$Path
RETVAL=$?
if [ $RETVAL -eq 0 ];then
action "Starting Nginx..."/bin/true
else
action "Starting Nginx..."/bin/false
fi
fi
return $RETVAL
}
#Define Stop Function
stop() {
if [ `ss -lntup|grep nginx|wc -l` -gt 0];then
$Path -s stop
RETVAL=$?
if [ $RETVAL -eq 0 ];then
action "Stopping Nginx..."/bin/true
else
action "Stopping Nginx..."/bin/false
fi
else
echo "Nginx is Stopped"
fi
return $RETVAL
}
#Define Restart Function
reload() {
if [ `ss -lntup|grep nginx|wc -l` -gt 0];then
$Path -s reload
RETVAL=$?
if [ $RETVAL -eq 0 ];then
action "Reloading Nginx..."/bin/true
else
action "Reloading Nginx..."/bin/false
fi
else
echo "Nginx is Stopped"
fi
return $RETVAL
}
#Define Restart Function
restart() {
stop
sleep 1
start
return $RETVAL
}
case "$1" in
start)
start
RETVAL=$?
;;
stop)
stop
RETVAL=$?
;;
reload)
reload
RETVAL=$?
;;
restart)
restart
RETVAL=$?
;;
*)
echo "USAGE:$0 {start|stop|reload|restart}"
RETVAL=2
;;
esac
exit $RETVAL

[root@web01 ~]# ls -l /etc/init.d/nginx
-rwxr-xr-x. 1 root root 1680 Jun 9 12:13 /etc/init.d/nginx
[root@web01 ~]# chkconfig --list|grep nginx
nginx 0:off 1:off 2:on 3:on 4:on 5:on 6:off

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