This makes more sense

init.d/cjdroute

@@ -11,6 +11,8 @@ cjdroute_tun_interface='cjd0'
 cjdroute_ipv6_addr='fca7:8aef:6571:63c5:b23c:2fbc:8dea:e207/8'
 cjdroute_listen_port='7530'
 
+service_pid=`lsof -i :"$cjdroute_listen_port" | tail -1 | cut -d ' ' -f 2`
+
 cjdroute.create_tun() {
 	ip tuntap add mode tun user "$service_username" group "$service_username" "$cjdroute_tun_interface"
 	ip a add "$cjdroute_ipv6_addr" dev "$cjdroute_tun_interface"
@@ -26,7 +28,6 @@ start() {
 }
 
 stop() {
-	service_pid=`lsof -i :"$cjdroute_listen_port" | tail -1 | cut -d ' ' -f 2`
 	watchman.stop
 	cjdroute.destroy_tun
 }