Add function for checking if a service is present

diff --git a/gdbus/gdbus.h b/gdbus/gdbus.h
index 818a36f..e0d653a 100644 (file)
--- a/gdbus/gdbus.h
+++ b/gdbus/gdbus.h
@@ -43,6 +43,8 @@ DBusConnection *g_dbus_setup_bus(DBusBusType type, const char *name,
 gboolean g_dbus_request_name(DBusConnection *connection, const char *name,
                                                        DBusError *error);
 
+gboolean g_dbus_check_service(DBusConnection *connection, const char *name);
+
 gboolean g_dbus_set_disconnect_function(DBusConnection *connection,
                                GDBusWatchFunction function,
                                void *user_data, DBusFreeFunction destroy);

diff --git a/gdbus/mainloop.c b/gdbus/mainloop.c
index d38bd63..9e49326 100644 (file)
--- a/gdbus/mainloop.c
+++ b/gdbus/mainloop.c
@@ -281,6 +281,49 @@ gboolean g_dbus_request_name(DBusConnection *connection, const char *name,
        return TRUE;
 }
 
+gboolean g_dbus_check_service(DBusConnection *connection, const char *name)
+{
+       DBusMessage *message, *reply;
+       const char **names;
+       int i, count;
+       gboolean result = FALSE;
+
+       message = dbus_message_new_method_call(DBUS_SERVICE_DBUS,
+                       DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "ListNames");
+       if (message == NULL) {
+               error("Can't allocate new message");
+               return FALSE;
+       }
+
+       reply = dbus_connection_send_with_reply_and_block(connection,
+                                                       message, -1, NULL);
+
+       dbus_message_unref(message);
+
+       if (reply == NULL) {
+               error("Failed to execute method call");
+               return FALSE;
+       }
+
+       if (dbus_message_get_args(reply, NULL,
+                               DBUS_TYPE_ARRAY, DBUS_TYPE_STRING,
+                               &names, &count, DBUS_TYPE_INVALID) == FALSE) {
+               error("Failed to read name list");
+               goto done;
+       }
+
+       for (i = 0; i < count; i++)
+               if (g_str_equal(names[i], name) == TRUE) {
+                       result = TRUE;
+                       break;
+               }
+
+done:
+       dbus_message_unref(reply);
+
+       return result;
+}
+
 gboolean g_dbus_set_disconnect_function(DBusConnection *connection,
                                GDBusWatchFunction function,
                                void *user_data, DBusFreeFunction destroy)