ConsoleKit, PolicyKit, HAL, XDG_SESSION_COOKIE

Julian Thomé frostisch at
Thu Jul 22 04:58:23 PDT 2010

Hello mailing list,

i have a question about the interaction between HAL, ConsoleKit,
PolicyKit and the environment variable XDG_SESSION_COOKIE.

As described in the documentation of ConsoleKit, the session-leader(gdm,
kdm) asks the ConsoleKit Daemon to open a new session. The ConsoleKit
Daemon returns the secret cookie to the session-leader.
The Console-Kit Daemon also determine which session is currently active
and can take control of the hardware of the Seat.

Can someone please summarize what happens if i plug-in an usb device in
a user-session (interaction between ConsoleKit, HAL, PolicyKit) and what
role the XDG_SESSION_COOKIE plays in this case.

It would be very nice if someone could help me

Tank you very much

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