fix reload bug

Author: duanhongyi

rootfs/etc/systemd/system/smartdns.service

@@ -5,9 +5,9 @@ After=network.target
 [Service]
 User=root
 Group=root
-WorkingDirectory={smartdns_path}
+WorkingDirectory=/usr/local/smartdns/script
 ExecStart=/bin/sh run_dns.sh
-ExecReload=/bin/kill -s HUP $MAINPID
+ExecReload=/bin/sh reload_dns.sh
 ExecStop=/bin/kill -s TERM $MAINPID
 EnvironmentFile=/etc/environment
 PrivateTmp=true

script/reload_dns.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+filepath=$(cd "$(dirname "$0")"; pwd)
+
+chmod a+r $filepath/../sdns.pid &>/dev/null
+pid=`cat $filepath/../sdns.pid 2>/dev/null`
+kill -s HUP ${pid}