[ConsoleKit] consolekit userid session counters

[Stef Bon]

On Wednesday 24 February 2010 12:53:53 Martin Vogt wrote:
> Hello list,
> 
> is there a mechanism in consolekit which counts the number
> of session for a user?

Hello,

I've had a simular problem.
The ConsoleKIt data is not in  a format where to get these kinds of 
characteristics of. First session, not the first session for a user... how 
many sessions?

Therefore, and to get a construction to start scripts/programs when a session 
is added and when it's removed, I've created a script which is started by the 
ConsoleKit daemon, run_scripts.ck which is in /etc/ConsoleKit/run-session.d.

I'm using it to generaly start scripts/programs when a session starts, and 
when it ends, in my case the adding of the user to autofs managed directories 
and start a fuse module.

I'ts able to start scripts via the at daemon or directly.
It's using some configuration files, so it may look complicated, but you'll 
get the idea I hope.

One of the things - apart from starting scripts - is to maintain a table in 
/tmp/ConsoleKit which looks like:

/tmp/ConsoleKit/sessions/Session1/session
...................................................unixuser
.....................................Session2/session
..................................................unixuser
......................../users/root/Session2 -> ../../sessions/Session2
................................/sbon/Seession1 -> ../../sessions/Session1



It's very easy now for scripts to count the number of sessions.

Stef Bon
> 
> I like to run an action if the "user_sessioncounter" reaches zero.
> 
> Example:
> 
> I added to ssh:
> >session  optional       pam_ck_connector.so
> 
> and if a user logs into the machine:
> >if test "$reason" = "session_added"; then
> >
> >        if [ -c /dev/nvidiactl ] ; then
> >        
> >          setfacl -m u:${CK_SESSION_USER_UID}:rw /dev/nvidia*
> >        
> >        fi
> >
> >else
> >
> >        if [ -c /dev/nvidiactl ] ; then
> >        
> >           setfacl -x u:${CK_SESSION_USER_UID} /dev/nvidia*
> >        
> >        fi
> >
> >fi
> 
> I'm adding him to the nvidia device.
> (this is for this project: http://www.virtualgl.org/)
> 
> But if the users login twice and then logouts
> from one session all the permissions are revoked. :(
> 
> An environment variable like
> 
> ${CK_SESSION_COUNTER_FOR_USER_UID}
> 
> would be helpful here.
> 
> Is there such a mechanism?
> 
> regards,
> 
> Martin
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