libnm: add NM_CLIENT_DBUS_NAME_OWNER property

It's not yet implemented. But obviously it's interesting to
get the name owner to which the NMClient is currently connected.

Note only that: the name-owner property really says whether
NM is currently running or not.

libnm/libnm.ver

@@ -1632,6 +1632,7 @@ global:
 libnm_1_22_0 {
 global:
 	nm_client_get_dbus_connection;
+	nm_client_get_dbus_name_owner;
 	nm_client_reload;
 	nm_client_reload_finish;
 	nm_manager_reload_flags_get_type;

libnm/nm-client.c

@@ -90,6 +90,7 @@ typedef struct {
 
 NM_GOBJECT_PROPERTIES_DEFINE (NMClient,
 	PROP_DBUS_CONNECTION,
+	PROP_DBUS_NAME_OWNER,
 	PROP_VERSION,
 	PROP_STATE,
 	PROP_STARTUP,
@@ -234,6 +235,23 @@ nm_client_get_dbus_connection (NMClient *client)
 	return NM_CLIENT_GET_PRIVATE (client)->dbus_connection;
 }
 
+/**
+ * nm_client_get_dbus_name_owner:
+ * @client: a #NMClient
+ *
+ * Returns: (transfer none): the current name owner of the D-Bus service of NetworkManager.
+ *
+ * Since: 1.22
+ **/
+const char *
+nm_client_get_dbus_name_owner (NMClient *client)
+{
+	g_return_val_if_fail (NM_IS_CLIENT (client), NULL);
+
+	/* FIXME(release-blocker): not yet implemented. */
+	return NULL;
+}
+
 /**
  * nm_client_get_version:
  * @client: a #NMClient
@@ -3478,7 +3496,9 @@ get_property (GObject *object, guint prop_id,
 	case PROP_DBUS_CONNECTION:
 		g_value_set_object (value, priv->dbus_connection);
 		break;
-
+	case PROP_DBUS_NAME_OWNER:
+		g_value_set_string (value, nm_client_get_dbus_name_owner (self));
+		break;
 	case PROP_NM_RUNNING:
 		g_value_set_boolean (value, nm_client_get_nm_running (self));
 		break;
@@ -3883,6 +3903,19 @@ nm_client_class_init (NMClientClass *client_class)
 	                         G_PARAM_CONSTRUCT_ONLY |
 	                         G_PARAM_STATIC_STRINGS);
 
+	/**
+	 * NMClient:dbus-name-owner:
+	 *
+	 * The name owner of the NetworkManager D-Bus service.
+	 *
+	 * Since: 1.22
+	 **/
+	obj_properties[PROP_DBUS_NAME_OWNER] =
+	    g_param_spec_string (NM_CLIENT_DBUS_NAME_OWNER, "", "",
+	                         NULL,
+	                         G_PARAM_READABLE |
+	                         G_PARAM_STATIC_STRINGS);
+
 	/**
 	 * NMClient:version:
 	 *

libnm/nm-client.h

@@ -27,6 +27,7 @@ G_BEGIN_DECLS
 #define NM_CLIENT_STARTUP         "startup"
 #define NM_CLIENT_NM_RUNNING      "nm-running"
 #define NM_CLIENT_DBUS_CONNECTION "dbus-connection"
+#define NM_CLIENT_DBUS_NAME_OWNER "dbus-name-owner"
 
 _NM_DEPRECATED_SYNC_WRITABLE_PROPERTY
 #define NM_CLIENT_NETWORKING_ENABLED "networking-enabled"
@@ -234,6 +235,9 @@ NMClient *nm_client_new_finish (GAsyncResult         *result,
 NM_AVAILABLE_IN_1_22
 GDBusConnection *nm_client_get_dbus_connection (NMClient *client);
 
+NM_AVAILABLE_IN_1_22
+const char *nm_client_get_dbus_name_owner (NMClient *client);
+
 const char *nm_client_get_version    (NMClient *client);
 NMState     nm_client_get_state      (NMClient *client);
 gboolean    nm_client_get_startup    (NMClient *client);