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问题:

I have some trouble with dbus-send when using a{sv}

Calling a method with in_signature='a{ss}' seems to work using the following command line:

dbus-send --dest="org.test.TestService"  /org/test/TestService/object org.test.TestService.method1 dict:string:string:"a","1","b","2"

Now I would like to have a dictionary with a variant type for values (in_signature=a{sv}),

How can I use it in dbus-send?

回答1:

Although D-Bus supports signatures such as a{sv}, dbus-send does not. This is from the dbus-send man page:

"...D-Bus supports more types than these, but dbus-send currently does not. Also, dbus-send does not permit empty containers or nested containers (e.g. arrays of variants)."

So as far as I can understand it, you cannot send a dict of string:variant using dbus-send.

回答2:

Not possible with `dbus-send`

As mentioned, dbus-send does not support all Dbus types. From dbus-send man page:

Also, dbus-send does not permit empty containers or nested containers (e.g. arrays of variants).

But possible `gdbus`

Buried in https://www.freedesktop.org/software/gstreamer-sdk/data/docs/2012.5/gio/gdbus.html we see this:

gdbus call --session \            --dest org.freedesktop.Notifications \            --object-path /org/freedesktop/Notifications \            --method org.freedesktop.Notifications.Notify \            my_app_name \            42 \            gtk-dialog-info \            "The Summary" \            "Here's the body of the notification" \            [] \            {} \            5000

Bonus: this method returns the id, so you can close or replace the notification.