Add arguments error if --active specified and ports not specified

yuuki · Feb 28, 2018 · 80b7608 · 80b7608
1 parent 8ea4384
commit 80b7608
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/cli.go b/cli.go
@@ -88,7 +88,11 @@ func (c *CLI) Run(args []string) int {
 		r = f
 	}
 
-	if passiveMode && len(ports) == 0 {
+	if activeMode && len(ports) == 0 {
+		log.Println("ports required if --active specified")
+		fmt.Fprint(c.errStream, helpText)
+		return exitCodeArgumentsError
+	} else if passiveMode && len(ports) == 0 {
 		var err error
 		ports, err = conntrack.LocalListeningPorts()
 		if err != nil {