On Wed, 2009-08-12 at 17:18 +0800, Edward Shu wrote:
> Brian Cameron:
> > 2. Project Summary
> > 2.1. Project Description:
> >
> > ConsoleKit is a FreeDesktop framework for defining and tracking
> > users,
> > login sessions and seats. ConsoleKit has two main purposes:
> >
> > - To maintain a database of information about each running session
> > which the display manager (GDM) uses. The old GDM keeps track of
> > this information internally, but new versions of GDM (2.21 and
> > later) use ConsoleKit.
> > - To support switching sessions and session migration when using
> >
> What is "session migration" here? Does it mean the session can be
> migrated from
> one VT to another VT? With VT, will ConsoleKit be noticed the session
> switch?
> Session switch may automatically cause the keyboard and mouse migration
> between sessions. Currently in Solaris, graphics session will grab the
> mouse and keyboard input from the text session in the session switch.
>
Leave the session migration question for Brian.
> >
> > 4. Technical Description:
> > 4.1. Details:
> >
> > ConsoleKit maintains a database of which users are logged into the
> > system. ConsoleKit groups sessions by seats which represent a set
> > of
> > hardware (usually a keyboard and mouse). Other process communicate
> > with ConsoleKit via D-Bus.
> >
> How ConsoleKit know which seat the session belong to?
>
For each session, there is D-Bus method call "GetSeatId" to get the seat
id.
And ck-list-sessions will print all properties of a session include
seat. In the 4.1.2 ck-list-sessions, the seat id is 'Seat1'
[quote]
SessionSeat1Local:
unix-user = '50'
realname = 'GDM Reserved UID'
seat = 'Seat1'
session-type = 'LoginWindow'
display-type = 'Local'
open = 'TRUE'
active = 'TRUE'
x11-display = ':0'
x11-display-device = '/dev/console'
display-device = '/dev/console'
remote-host-name = ''
is-local = 'TRUE'
on-since = '2009-08-11T06:46:42.941134Z'
login-session-id = ''
idle-since-hint = ''
[/quote]
Regards,
Halton.
