fix daemon log not created error

Author: codeskyblue

.travis.yml

@@ -2,7 +2,7 @@
 language: go
 sudo: false
 go:
-  - "1.12"
+  - "1.13"
 env:
   - GO111MODULE=on
 

hub.go

@@ -175,7 +175,7 @@ func (c *Client) readPump() {
 
 func broadcastWebsocket() func(http.ResponseWriter, *http.Request) {
 	hub := newHub()
-	go hub.run()
+	go hub.run() // start read images from unix:@minicap
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		conn, err := upgrader.Upgrade(w, r, nil)

main.go

@@ -380,11 +380,16 @@ func translateMinicap(conn net.Conn, jpgC chan []byte, ctx context.Context) erro
 func runDaemon() (cntxt *daemon.Context) {
 	cntxt = &daemon.Context{ // remove pid to prevent resource busy
 		PidFilePerm: 0644,
-		LogFileName: daemonLogPath,
 		LogFilePerm: 0640,
 		WorkDir:     "./",
 		Umask:       022,
 	}
+	// log might be no auth
+	if f, err := os.OpenFile(daemonLogPath, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644); err == nil {
+		f.Close()
+		cntxt.LogFileName = daemonLogPath
+	}
+
 	child, err := cntxt.Reborn()
 	if err != nil {
 		log.Fatal("Unale to run: ", err)