1 files changed, 89 insertions, 0 deletions
diff --git a/examples/C/glib/monitor-nm-running-gdbus.c b/examples/C/glib/monitor-nm-running-gdbus.c
new file mode 100644
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+++ b/examples/C/glib/monitor-nm-running-gdbus.c
@@ -0,0 +1,89 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright 2012 Red Hat, Inc.
+ */
+
+/*
+ * This example monitors whether NM is running by checking if
+ * "org.freedesktop.NetworkManager" is owned by a process on D-Bus.
+ * It uses g_bus_watch_name().
+ *
+ * See also http://developer.gnome.org/gio/stable/gio-Watching-Bus-Names.html
+ *
+ * Standalone compilation:
+ *   gcc -Wall `pkg-config --libs --cflags glib-2.0 gio-2.0` monitor-nm-running-gdbus.c -o monitor-nm-running-gdbus
+ */
+
+#include "config.h"
+
+#include <gio/gio.h>
+
+static void
+on_name_appeared (GDBusConnection *connection,
+                  const gchar     *name,
+                  const gchar     *name_owner,
+                  gpointer         user_data)
+{
+	g_print ("Name '%s' on the system bus is owned by %s => NM is running\n",
+	         name, name_owner);
+}
+
+static void
+on_name_vanished (GDBusConnection *connection,
+                  const gchar     *name,
+                  gpointer         user_data)
+{
+	g_print ("Name '%s' does not exist on the system bus => NM is not running\n", name);
+}
+
+
+int
+main (int argc, char *argv[])
+{
+	guint watcher_id;
+	GMainLoop *loop;
+	GBusNameWatcherFlags flags;
+
+#if !GLIB_CHECK_VERSION (2, 35, 0)
+	/* Initialize GType system */
+	g_type_init ();
+#endif
+
+	g_print ("Monitor 'org.freedesktop.NetworkManager' D-Bus name\n");
+	g_print ("===================================================\n");
+
+	flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
+
+	/* Start to watch "org.freedesktop.NetworkManager" bus name */
+	watcher_id = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
+	                               "org.freedesktop.NetworkManager",
+	                               flags,
+	                               on_name_appeared,
+	                               on_name_vanished,
+	                               NULL,
+	                               NULL);
+
+	/* Run main loop */
+	loop = g_main_loop_new (NULL, FALSE);
+	g_main_loop_run (loop);
+
+	/* Stop watching the name */
+	g_bus_unwatch_name (watcher_id);
+
+	return 0;
+}
+