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
135 lines
4.0 KiB
C
135 lines
4.0 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 NM state via D-Bus "StateChanged" signal on
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* "org.freedesktop.NetworkManager" object.
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* It uses GDBus and the libnm headers.
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* You don't need to have the NetworkManager devel packages installed. You can just
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* grab nm-dbus-interface.h and put it in the path.
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*
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* Standalone compilation:
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* gcc -Wall monitor-nm-state-gdbus.c -o monitor-nm-state-gdbus `pkg-config --cflags --libs libnm`
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*/
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#include <gio/gio.h>
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#include <string.h>
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#include <nm-dbus-interface.h>
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static const char *
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nm_state_to_string (NMState state)
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{
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switch (state) {
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case NM_STATE_ASLEEP:
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return "asleep";
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case NM_STATE_CONNECTING:
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return "connecting";
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case NM_STATE_CONNECTED_LOCAL:
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return "connected (local only)";
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case NM_STATE_CONNECTED_SITE:
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return "connected (site only)";
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case NM_STATE_CONNECTED_GLOBAL:
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return "connected";
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case NM_STATE_DISCONNECTING:
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return "disconnecting";
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case NM_STATE_DISCONNECTED:
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return "disconnected";
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case NM_STATE_UNKNOWN:
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default:
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return "unknown";
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}
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}
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static void
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on_signal (GDBusProxy *proxy,
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gchar *sender_name,
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gchar *signal_name,
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GVariant *parameters,
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gpointer user_data)
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{
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guint32 new_state;
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/* Print all signals */
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//gchar *parameters_str;
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//parameters_str = g_variant_print (parameters, TRUE);
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//g_print (" *** Received Signal: %s: %s\n", signal_name, parameters_str);
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//g_free (parameters_str);
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/* We are only interested in "StateChanged" signal */
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if (strcmp (signal_name, "StateChanged") == 0) {
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GVariant *tmp = g_variant_get_child_value (parameters, 0);
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new_state = g_variant_get_uint32 (tmp);
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g_variant_unref (tmp);
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g_print ("NetworkManager state is: (%d) %s\n", new_state, nm_state_to_string ((NMState) new_state));
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}
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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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GMainLoop *loop;
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GError *error = NULL;
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GDBusProxyFlags flags;
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GDBusProxy *proxy;
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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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/* Monitor 'StateChanged' signal on 'org.freedesktop.NetworkManager' interface */
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g_print ("Monitor NetworkManager's state\n");
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g_print ("==============================\n");
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flags = G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES | G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START;
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proxy = g_dbus_proxy_new_for_bus_sync (G_BUS_TYPE_SYSTEM,
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flags,
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NULL, /* GDBusInterfaceInfo */
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"org.freedesktop.NetworkManager",
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"/org/freedesktop/NetworkManager",
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"org.freedesktop.NetworkManager",
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NULL, /* GCancellable */
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&error);
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if (proxy == NULL)
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{
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g_dbus_error_strip_remote_error (error);
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g_printerr ("Error creating D-Bus proxy: %s\n", error->message);
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g_error_free (error);
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return -1;
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}
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/* Connect to g-signal to receive signals from proxy (remote object) */
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g_signal_connect (proxy,
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"g-signal",
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G_CALLBACK (on_signal),
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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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g_object_unref (proxy);
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return 0;
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}
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