/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* vim: set ft=c ts=4 sts=4 sw=4 noexpandtab smartindent: */ /* * 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. * * (C) 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 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; /* Initialize GType system */ g_type_init (); 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; }