add quiet flag

backup.go

@@ -13,6 +13,7 @@ var (
 	cfgFile  = flag.String("config", "config.json", "config file")
 	isDaemon = flag.Bool("daemon", false, "run as daemon")
 	debug    = flag.Bool("debug", false, "log debug messages")
+	quiet    = flag.Bool("quiet", false, "remove most log messages")
 	logFile  = flag.String("logfile", "", "log file")
 	cfg      Config
 	email    *Email
@@ -26,6 +27,9 @@ func main() {
 	if *debug {
 		log.SetLevel(log.DebugLevel)
 	}
+	if *quiet {
+		log.SetLevel(log.WarnLevel)
+	}
 	if *logFile != "" {
 		if f, err := os.OpenFile(*logFile, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644); err != nil {
 			log.Printf("Cannot open logfile (%s)", err)