feat: service sanager directly controls

procd 服务脚本删除 `SERVICE_DAEMONIZE=1`，systemd 服务单元更改服务类型为 exec 并添加 -f 参数
在此基础上删除 pid 文件相关内容

Author: xxxxxliil

package/openwrt/files/etc/init.d/smartdns

@@ -10,13 +10,6 @@ START=19
 STOP=82
 NAME=smartdns
 USE_PROCD=1
-SERVICE_USE_PID=1
-SERVICE_WRITE_PID=1
-SERVICE_DAEMONIZE=1
-SERVICE_PID_FILE="/run/smartdns.pid"
-if [ ! -d "/run" ]; then
-	SERVICE_PID_FILE="/var/run/smartdns.pid"
-fi
 
 SMARTDNS_DOWNLOAD_TMP_DIR="/tmp/smartdns-download"
 SMARTDNS_DEFAULT_FORWARDING_FILE="/etc/smartdns/domain-forwarding.list"

package/redhat/smartdns.spec

@@ -41,7 +41,6 @@ After=syslog.target network-online.target
 [Service]
 Type=simple
 ExecStart=/usr/sbin/smartdns -c /etc/smartdns/smartdns.conf -f
-PIDFile=/run/smartdns.pid
 Restart=on-failure
 KillMode=process
 

systemd/smartdns.service.in

@@ -8,10 +8,9 @@ StartLimitBurst=0
 StartLimitIntervalSec=60
 
 [Service]
-Type=forking
-PIDFile=@RUNSTATEDIR@/smartdns.pid
+Type=exec
 EnvironmentFile=@SYSCONFDIR@/default/smartdns
-ExecStart=@SBINDIR@/smartdns -p @RUNSTATEDIR@/smartdns.pid $SMART_DNS_OPTS
+ExecStart=@SBINDIR@/smartdns $SMART_DNS_OPTS -f
 Restart=always
 RestartSec=2
 TimeoutStopSec=15