Import Upstream version 2.72.4

gio/tests/gdbus-example-watch-name.c

@@ -0,0 +1,86 @@
+#include <gio/gio.h>
+
+static gchar *opt_name         = NULL;
+static gboolean opt_system_bus = FALSE;
+static gboolean opt_auto_start = FALSE;
+
+static GOptionEntry opt_entries[] =
+{
+  { "name", 'n', 0, G_OPTION_ARG_STRING, &opt_name, "Name to watch", NULL },
+  { "system-bus", 's', 0, G_OPTION_ARG_NONE, &opt_system_bus, "Use the system-bus instead of the session-bus", NULL },
+  { "auto-start", 'a', 0, G_OPTION_ARG_NONE, &opt_auto_start, "Instruct the bus to launch an owner for the name", NULL},
+  G_OPTION_ENTRY_NULL
+};
+
+static void
+on_name_appeared (GDBusConnection *connection,
+                  const gchar     *name,
+                  const gchar     *name_owner,
+                  gpointer         user_data)
+{
+  g_print ("Name %s on %s is owned by %s\n",
+           name,
+           opt_system_bus ? "the system bus" : "the session bus",
+           name_owner);
+}
+
+static void
+on_name_vanished (GDBusConnection *connection,
+                  const gchar     *name,
+                  gpointer         user_data)
+{
+  g_print ("Name %s does not exist on %s\n",
+           name,
+           opt_system_bus ? "the system bus" : "the session bus");
+}
+
+int
+main (int argc, char *argv[])
+{
+  guint watcher_id;
+  GMainLoop *loop;
+  GOptionContext *opt_context;
+  GError *error;
+  GBusNameWatcherFlags flags;
+
+  error = NULL;
+  opt_context = g_option_context_new ("g_bus_watch_name() example");
+  g_option_context_set_summary (opt_context,
+                                "Example: to watch the power manager on the session bus, use:\n"
+                                "\n"
+                                "  ./example-watch-name -n org.gnome.PowerManager");
+  g_option_context_add_main_entries (opt_context, opt_entries, NULL);
+  if (!g_option_context_parse (opt_context, &argc, &argv, &error))
+    {
+      g_printerr ("Error parsing options: %s", error->message);
+      goto out;
+    }
+  if (opt_name == NULL)
+    {
+      g_printerr ("Incorrect usage, try --help.\n");
+      goto out;
+    }
+
+  flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
+  if (opt_auto_start)
+    flags |= G_BUS_NAME_WATCHER_FLAGS_AUTO_START;
+
+  watcher_id = g_bus_watch_name (opt_system_bus ? G_BUS_TYPE_SYSTEM : G_BUS_TYPE_SESSION,
+                                 opt_name,
+                                 flags,
+                                 on_name_appeared,
+                                 on_name_vanished,
+                                 NULL,
+                                 NULL);
+
+  loop = g_main_loop_new (NULL, FALSE);
+  g_main_loop_run (loop);
+
+  g_bus_unwatch_name (watcher_id);
+
+ out:
+  g_option_context_free (opt_context);
+  g_free (opt_name);
+
+  return 0;
+}