examples: add C examples for listing connections from system settings service

examples/C/Makefile.am

@@ -6,7 +6,11 @@ AM_CPPFLAGS = \
 	$(DBUS_CFLAGS) \
 	$(GLIB_CFLAGS)
 
-noinst_PROGRAMS = add-connection-glib get-active-connections
+noinst_PROGRAMS = \
+	add-connection-glib \
+	get-active-connections \
+	list-connections-dbus \
+	list-connections-libnm-glib
 
 add_connection_glib_SOURCES = add-connection-glib.c
 add_connection_glib_LDADD = \
@@ -20,7 +24,22 @@ get_active_connections_LDADD = \
 	$(DBUS_LIBS) \
 	$(GLIB_LIBS)
 
+list_connections_dbus_SOURCES = list-connections-dbus.c
+list_connections_dbus_LDADD = \
+	$(top_builddir)/libnm-util/libnm-util.la \
+	$(DBUS_LIBS) \
+	$(GLIB_LIBS)
+
+list_connections_libnm_glib_SOURCES = list-connections-libnm-glib.c
+list_connections_libnm_glib_LDADD = \
+	$(top_builddir)/libnm-util/libnm-util.la \
+	$(top_builddir)/libnm-glib/libnm-glib.la \
+	$(DBUS_LIBS) \
+	$(GLIB_LIBS)
+
 EXTRA_DIST = \
 	add-connection-glib.c \
-	get-active-connections.c
+	get-active-connections.c \
+	list-connections-dbus.c \
+	list-connections-libnm-glib.c
 

examples/C/list-connections-dbus.c

@@ -0,0 +1,83 @@
+/*
+ * 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 2010 Red Hat, Inc.
+ */
+
+/*
+ * The example shows how to list connections from System Settings service using direct
+ * D-Bus call of ListConnections method.
+ * The example uses dbus-glib, libnm-util libraries.
+ *
+ * Compile with:
+ *   gcc -Wall `pkg-config --libs --cflags glib-2.0 dbus-glib-1 libnm-util` list-connections-dbus.c -o list-connections-dbus
+ */
+
+#include <glib.h>
+#include <dbus/dbus-glib.h>
+#include <stdio.h>
+
+#include <NetworkManager.h>
+#include <nm-utils.h>
+
+#define DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH    (dbus_g_type_get_collection ("GPtrArray", DBUS_TYPE_G_OBJECT_PATH))
+
+static void
+list_connections (DBusGProxy *proxy)
+{
+	int i;
+	GError *error = NULL;
+	GPtrArray *con_array;
+
+	/* Call ListConnections D-Bus method */
+	dbus_g_proxy_call (proxy, "ListConnections", &error,
+	                   /* No input arguments */
+	                   G_TYPE_INVALID,
+	                   DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH, &con_array, /* Return values */
+	                   G_TYPE_INVALID);
+
+	for (i = 0; con_array && i < con_array->len; i++) {
+		char *connection_path = g_ptr_array_index (con_array, i);
+		printf ("%s\n", connection_path);
+		g_free (connection_path);
+	}
+	g_ptr_array_free (con_array, TRUE);
+}
+
+int main (int argc, char *argv[])
+{
+	DBusGConnection *bus;
+	DBusGProxy *proxy;
+
+	/* Initialize GType system */
+	g_type_init ();
+
+	/* Get system bus */
+	bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, NULL);
+
+	/* Create a D-Bus proxy; NM_DBUS_* defined in NetworkManager.h */
+	proxy = dbus_g_proxy_new_for_name (bus,
+	                                   NM_DBUS_SERVICE_SYSTEM_SETTINGS,
+	                                   NM_DBUS_PATH_SETTINGS,
+	                                   NM_DBUS_IFACE_SETTINGS);
+
+	/* List connections of system settings service */
+	list_connections (proxy);
+
+	g_object_unref (proxy);
+	dbus_g_connection_unref (bus);
+
+	return 0;
+}

examples/C/list-connections-libnm-glib.c

@@ -0,0 +1,178 @@
+/*
+ * 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 2010 Red Hat, Inc.
+ */
+
+/*
+ * The example shows how to list connections from System Settings service using libnm-glib
+ * (that wraps direct D-Bus calls).
+ * The example uses dbus-glib, libnm-util and libnm-glib libraries.
+ *
+ * Compile with:
+ *   gcc -Wall `pkg-config --libs --cflags glib-2.0 dbus-glib-1 libnm-util libnm-glib` list-connections-libnm-glib.c -o list-connections-libnm-glib
+ */
+
+#include <glib.h>
+#include <dbus/dbus-glib.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#include <nm-connection.h>
+#include <nm-setting-connection.h>
+#include <NetworkManager.h>
+#include <nm-utils.h>
+#include <nm-remote-settings.h>
+#include <nm-remote-settings-system.h>
+#include <nm-settings-interface.h>
+
+
+/* Global variables */
+GMainLoop *loop = NULL; /* Main loop variable - needed for waiting for signal */
+int result = EXIT_SUCCESS;
+
+static void
+signal_handler (int signo)
+{
+	if (signo == SIGINT || signo == SIGTERM) {
+		g_message ("Caught signal %d, shutting down...", signo);
+		g_main_loop_quit (loop);
+	}
+}
+
+static void
+setup_signals (void)
+{
+	struct sigaction action;
+	sigset_t mask;
+
+	sigemptyset (&mask);
+	action.sa_handler = signal_handler;
+	action.sa_mask = mask;
+	action.sa_flags = 0;
+	sigaction (SIGTERM,  &action, NULL);
+	sigaction (SIGINT,  &action, NULL);
+}
+
+/* Print details of connection */
+static void
+show_connection (NMConnection *data, gpointer user_data)
+{
+	NMConnection *connection = (NMConnection *) data;
+	NMSettingConnection *s_con;
+	guint64 timestamp;
+	char *timestamp_str;
+	char timestamp_real_str[64];
+	const char *val1, *val2, *val3, *val4, *val5;
+
+	s_con = (NMSettingConnection *) nm_connection_get_setting (connection, NM_TYPE_SETTING_CONNECTION);
+	if (s_con) {
+		/* Get various info from NMSettingConnection and show it */
+		timestamp = nm_setting_connection_get_timestamp (s_con);
+		timestamp_str = g_strdup_printf ("%" G_GUINT64_FORMAT, timestamp);
+		strftime (timestamp_real_str, sizeof (timestamp_real_str), "%c", localtime ((time_t *) &timestamp));
+
+		val1 = nm_setting_connection_get_id (s_con);
+		val2 = nm_setting_connection_get_uuid (s_con);
+		val3 = nm_setting_connection_get_connection_type (s_con);
+		val4 = nm_connection_get_path (connection);
+		val5 = timestamp ? timestamp_real_str : "never";
+
+		printf ("%-25s | %s | %-15s | %-43s | %s\n", val1, val2, val3, val4, val5);
+
+		g_free (timestamp_str);
+	}
+}
+
+/* This callback is called when connections from the settings service are ready.
+ * Now the connections can be listed.
+ */
+static void
+get_connections_cb (NMSettingsInterface *settings, gpointer user_data)
+{
+	GSList *system_connections;
+
+	system_connections = nm_settings_interface_list_connections (settings);
+
+	printf ("System connections:\n===================\n");
+
+	g_slist_foreach (system_connections, (GFunc) show_connection, NULL);
+
+	g_slist_free (system_connections);
+	g_object_unref (settings);
+
+	/* We are done, exit main loop */
+	g_main_loop_quit (loop);
+}
+
+/* Get system settings and then connect to connections-read signal */
+static gboolean
+list_connections (gpointer data)
+{
+	DBusGConnection *bus = (DBusGConnection *) data;
+	NMRemoteSettingsSystem *system_settings;
+	gboolean system_settings_running;
+
+	/* Get system settings */
+	if (!(system_settings = nm_remote_settings_system_new (bus))) {
+		g_message ("Error: Could not get system settings.");
+		result = EXIT_FAILURE;
+		g_main_loop_quit (loop);
+		return FALSE;
+	}
+
+	/* Find out whether setting service is running */
+	g_object_get (system_settings, NM_REMOTE_SETTINGS_SERVICE_RUNNING, &system_settings_running, NULL);
+
+	if (!system_settings_running) {
+		g_message ("Error: Can't obtain connections: settings service is not running.");
+		result = EXIT_FAILURE;
+		g_main_loop_quit (loop);
+		return FALSE;
+	}
+
+	/* Connect to signal "connections-read" - emitted when connections are fetched and ready */
+	g_signal_connect (system_settings, NM_SETTINGS_INTERFACE_CONNECTIONS_READ,
+	                  G_CALLBACK (get_connections_cb), NULL);
+
+	return FALSE;
+}
+
+int main (int argc, char *argv[])
+{
+	DBusGConnection *bus;
+
+	/* Initialize GType system */
+	g_type_init ();
+
+	/* Get system bus */
+	bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, NULL);
+
+	/* Run list_connections from main loop, because we need to wait for "connections-read"
+	 * signal to have connections ready. The execution will be finished in get_connections_cb()
+	 * callback on the signal.
+	 */
+	g_idle_add (list_connections, bus);
+
+	loop = g_main_loop_new (NULL, FALSE);  /* Create main loop */
+	setup_signals ();                      /* Setup UNIX signals */
+	g_main_loop_run (loop);                /* Run main loop */
+
+	g_main_loop_unref (loop);
+	dbus_g_connection_unref (bus);
+
+	return result;
+}