filter for displaying number of pages for each print job

[Jerome Alet]

> I'm wondering if there exists any filter for CUPS that can obtain number of pages that are going to be printed for each print job.
>
> I have used testipp to receive that number, but I found out that command > returns such value from printer itself. So if somebody is going to print > 100 pages, it takes a lot of time for testipp command to show the number > of printed pages. What I need is a way to get the number of pages > immediately after releasing jobs or even better if they are still held.

See http://www.pykota.com/software/pkpgcounter/ which is used
by both the PyKota and JASmine print accounting software.