843ea77e93
On modern distributions, ld runs with the '--as-needed' option enabled by default, meaning library dependencies must come after files that require them. Also, this allows indirect linking so the build commands can be simplified. The alternative is to add the '-Wl,--no-as-needed' gcc option or use the top-level Makefile. Tested on: * Ubuntu 16.04.3 with gcc Ubuntu 5.4.1-8ubuntu1 * Fedora 24 with gcc Red Hat 6.1.1-3 Signed-off-by: Lucas Magasweran <lucas.magasweran@ieee.org> https://mail.gnome.org/archives/networkmanager-list/2017-September/msg00022.html https://mail.gnome.org/archives/networkmanager-list/2017-September/msg00023.html https://mail.gnome.org/archives/networkmanager-list/2017-September/msg00025.html
88 lines
2.7 KiB
C
88 lines
2.7 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright 2012 Red Hat, Inc.
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*/
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/*
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* This example monitors whether NM is running by checking if
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* "org.freedesktop.NetworkManager" is owned by a process on D-Bus.
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* It uses g_bus_watch_name().
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*
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* See also http://developer.gnome.org/gio/stable/gio-Watching-Bus-Names.html
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*
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* Standalone compilation:
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* gcc -Wall monitor-nm-running-gdbus.c -o monitor-nm-running-gdbus `pkg-config --libs --cflags gio-2.0`
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*/
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#include <gio/gio.h>
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static void
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on_name_appeared (GDBusConnection *connection,
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const gchar *name,
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const gchar *name_owner,
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gpointer user_data)
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{
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g_print ("Name '%s' on the system bus is owned by %s => NM is running\n",
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name, name_owner);
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}
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static void
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on_name_vanished (GDBusConnection *connection,
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const gchar *name,
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gpointer user_data)
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{
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g_print ("Name '%s' does not exist on the system bus => NM is not running\n", name);
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}
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int
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main (int argc, char *argv[])
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{
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guint watcher_id;
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GMainLoop *loop;
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GBusNameWatcherFlags flags;
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#if !GLIB_CHECK_VERSION (2, 35, 0)
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/* Initialize GType system */
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g_type_init ();
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#endif
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g_print ("Monitor 'org.freedesktop.NetworkManager' D-Bus name\n");
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g_print ("===================================================\n");
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flags = G_BUS_NAME_WATCHER_FLAGS_NONE;
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/* Start to watch "org.freedesktop.NetworkManager" bus name */
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watcher_id = g_bus_watch_name (G_BUS_TYPE_SYSTEM,
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"org.freedesktop.NetworkManager",
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flags,
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on_name_appeared,
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on_name_vanished,
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NULL,
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NULL);
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/* Run main loop */
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loop = g_main_loop_new (NULL, FALSE);
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g_main_loop_run (loop);
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/* Stop watching the name */
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g_bus_unwatch_name (watcher_id);
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return 0;
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}
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