On Tue, 17 Sep 2019 12:08:42 +0000, 刘铁罡 wrote: > In fact, I want to send "(qqay)" via dbus-send. > I can’t find a struct sample of dbus-send. According to the man page <https://linux.die.net/man/1/dbus-send>, there are limitations: D-Bus supports more types than these, but dbus-send currently does not.