This function calls method on the D-Bus bus
asynchronously. bus is either the keyword :system or the
keyword :session.
service is the D-Bus service name to be used. path is the D-Bus object path, service is registered at. interface is an interface offered by service. It must provide method.
handler is a Lisp function, which is called when the
corresponding return message arrives. If handler is nil,
no return message will be expected.
If the parameter :timeout is given, the following integer
timeout specifies the maximum number of milliseconds before a
reply message must arrive. The default value is 25,000. If there is
no reply message in time, a D-Bus error is raised (see Errors and events.).
The remaining arguments args are passed to method as arguments. They are converted into D-Bus types as described in Mapping Lisp types and D-Bus types..
If handler is a Lisp function, the function returns a key into
the hash table dbus-registered-objects-table. The
corresponding entry in the hash table is removed, when the return
message arrives, and handler is called. Example:
(dbus-call-method-asynchronously :system "org.freedesktop.Hal" "/org/freedesktop/Hal/devices/computer" "org.freedesktop.Hal.Device" "GetPropertyString" (lambda (msg) (message "%s" msg)) "system.kernel.machine") -| i686 ⇒ (:serial :system 2)