GSettings tool: work-around GDBus issue

There is currently no way (near as I can tell) to ensure that a message
has been sent when using GDBus.  If we exit() before we are sure, then
it is very possible that the message isn't sent at all.  This behaviour
was observed when using the GSettings commandline tool with dconf.

A quick and dirty workaround for now.

diff --git a/gio/gsettings-tool.c b/gio/gsettings-tool.c
index 257c965..fdaacdc 100644 (file)
--- a/gio/gsettings-tool.c
+++ b/gio/gsettings-tool.c
@@ -215,6 +215,24 @@ handle_set (gint   *argc,
 
   ret = 0;
 
+  /* XXX: workaround for now
+   *
+   * if we exit() so quickly, GDBus may not have had a chance to
+   * actually send the message (since we're using it async).
+   *
+   * GDBusConnection has no API to sync or wait for messages to be sent,
+   * so we send a meaningless message and wait for the reply to ensure
+   * that all messages that came before must have been sent.
+   */
+  {
+    GDBusConnection *session;
+
+    session = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, NULL);
+    g_dbus_connection_call_sync (session, "org.gtk.DoesNotExist", "/",
+                                 "org.gtk.DoesNotExist", "Workaround",
+                                 g_variant_new ("()"), 0, -1, NULL, NULL);
+  }
+
  out:
   g_option_context_free (context);