deleting cups jobs on user logoff

[prometheus0815]

hi all!

i'm running a gentoo-based ltsp server with about 20 clients. my problem is that the the laserjet (driven via standalone printserver) is usually out of paper (users are supposed to bring their own) and then the cups queue quickly fills up with the jobs of users who gave up and left.

my idea is to delete each user's print jobs once he or she logs off. this way, the users would have to remain logged on as long as their documents are being printet, but the queue would never again be blocked by someone's old jobs.

the point is: how can i implement that? i don't have a damn clue about cups (it was simply working so far), and i really hope someone out there has an idea. this problem is driving me (and the users) mad over time...

any kind of help will be appreciated, even if it's just the tiniest hint on how to handle that. thanks in advance!
_________________
Man must shape his tools, lest they shape him.

[Spooky Ghost]

If the shell is bash you could create a ~/.bash_logout with a cancel -u `whoami` in it. However this probably wouldn't work so well if your users can have simulataneous logons.

How about a cron script that parses the output from lpstat and checks that the owner of a job is currently logged on to the system? If they aren't connected then again do a cancel -u.

[fleed]

Adding to Spooky Ghost's idea (or rather, combining the two ideas), add a script to bash_logout that checks if this is the last shell and cancels all the jobs.