formatting/partitioning methods in HAL

[Artem Kachitchkine]

> D-BUS and HAL provides a very nice and secure way of allowing certain
> unprivileged users to do very basic and *controlled* things through
> D-BUS method invocations.

One thing I found with integraing D-BUS into a non-native OS (I'm I 
allowed to say that? :) is that it's difficult to integrate with 
existing security mechanisms. D-BUS is limited in recognizing extended 
security attributes (identity, authentication, privileges, etc) at the 
other end of communication (methods and, more so, signals). UID is not 
enough, even you recently hit the wall with the lack of session 
identifier for ConsoleTracker. In theory, D-BUS in expandable in this 
area, but it has not been done in recent history, as far as I can tell.

-Artem.