M openbox/openbox.c → openbox/openbox.c

@@ -271,6 +271,10 @@ if (i == argc - 1) /* no args left */
                 g_printerr("-rc requires an argument\n");
             else
                 ob_rc_path = argv[++i];
+        } else {
+            g_printerr("Invalid option: '%s'\n\n", argv[i]);
+            print_help();
+            exit(1);
         }
     }
 }