[cups.development] How/where do I add a custom access control

[Leif Johansson]

Erik Forsberg wrote:
> Hi!
> 
> We'd like to limit access to some of the print queues in a CUPS system
> based on information we have in a database. For example, we'd like to
> limit access based on which client machine a user is using at the
> moment.
> 
> Are there any simple way to plug in such access control in the CUPS
> processing chain? 
> 
> I got the idea that we could "hijack" the conversion between
> application/postscript and application/vnc.cups-postscript, adding our
> own conversion script and then, if access is allowed, pass the job to
> the normal filter (pstops). Is this a good or bad idea? 
> 
> Solutions that demand the absolutely newest CUPS are not very
> interesting, since this has to work on CUPS installations provided by
> Linux distributions, and they tend to be one or several versions
> behind. 
> 
> Thanks,
> \EF

We have looked at the same problem in the context of a quota-system.
Earlier versions of cups needed a patch. Take a look at pykota for an
example of a solution.

	MVH leifj