test-record: Check parameter count and print out help

If no launch pipeline was supplied, print out some help

diff --git a/examples/test-record.c b/examples/test-record.c
index 1c6ac3f..1c37503 100644 (file)
--- a/examples/test-record.c
+++ b/examples/test-record.c
@@ -51,6 +51,11 @@ main (int argc, char *argv[])
     g_printerr ("Error parsing options: %s\n", error->message);
     return -1;
   }
+
+  if (argc < 2) {
+    g_print ("%s\n", g_option_context_get_help (optctx, TRUE, NULL));
+    return 1;
+  }
   g_option_context_free (optctx);
 
   loop = g_main_loop_new (NULL, FALSE);