mkdir: Return status added.

mkdir/main.go

@@ -9,8 +9,9 @@ import(
 func main() {
 	var (
 		parentFlag, verbFlag bool
-		modeArg int
+		 modeArg int
 	)
+	status := 0
 	flag.BoolVar(&parentFlag, "p", false, "No error if existing, make parent as needed.")
 	flag.IntVar(&modeArg, "m", 0766, "Set file `mode`.")
 	flag.BoolVar(&verbFlag, "v", false, "Print a message for each created directory.")
@@ -33,8 +34,10 @@ func main() {
 		}
 		if err != nil {
 			warn.Println(err)
+			status = 1
 		} else if verbFlag {
 			verb.Printf("Created directory '%s'.", path)
 		}
 	}
+	os.Exit(status)
 }