<none>输出中的接口gdbus-monitor有什么特殊含义吗？
GDbus使用(g_dbus_connection_register_object不允许传递NULLasGDBusInterfaceInfo *并且这似乎是唯一将对象注册到路径的方法)创建这样的消息需要什么 API 调用
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Looking into dbus-monitor's source code shows that it occures as soon as DBUS_EXPORT const char * dbus_message_get_interface ( DBusMessage * message ) returns NULL (which is valid!, but not according to the spec which requires minimum one . and two name chunks!! EDIT: A noteable exception are method calls which do not require the interface field of a message to be set http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-types).
g_dbus_message_new_method_call (...) allows interface_ to be null. But that still only solves half the problems (sender). The receiver method seems to not exist for interface_s being NULL.
Turns out it is a bug, I did a source code investigation and filed a bug (including fix) https://bugzilla.gnome.org/show_bug.cgi?id=706675
于 2013-08-21T16:49:02.543 回答
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客户端在订阅 g_dbus_connection_signal_subscribe 任何信号时需要知道接口名称，否则它将监听所有接口，因此效率低下。需要接口来绑定服务器自省 xml 文件中提到的单个实体中的方法和信号。
于 2015-03-06T14:01:33.350 回答