save input file before filter processing

[Myska Ludek]

I read documentation about file mime.convs.I found filter definition for printed file.I change the file with add lines:

application/postscript application/psacoounting 100 psaccounting
application/psaccounting application/vn.cups-postscript 100 pstops

Then i place file to /usr/lib/cups/filters/psaccounting make executable for anyone with this content:
---
#!/bin/bash

echo $6 > /tmp/`date`.ps
exit
---
Just test script.But when i print poscript file nothing happend.No file in tmp.
No error in cups log.Then i read documentation second time and i find line with recomendation to store own conv file to /etc/cups/.I dit it and nothing happend.
How i change mime.convs file to make any change in filter processing?

> Yes, there is.  $6 is the print job pre filters, you would just need to insert your filter first in the chain via the .convs process
> > Hi.
> > I use windows generic postscript and cupsaddsmb to assing driver to printer and share this driver to network.Then i use tea4cups and pkpgcounter for job accounting a then send print to real backend with driver for printer.And here is a problem.If printert can print postscript there is no problem with accounting.If print use only pcl(5,5e,6) pkpgcounter dont work well but printing is fine.
> > Is there a way to catch print job (postscript from windows clients) before run thrue filter pstopxl a send him to pkpgcounter or to another printer with tea4cups backend ?.
> > I use Debian GNU/Linux 6.4 i386 in vmware and samba is connected to windows active directory.samba v3.5.4 and cups v1.4.4.Sorry for my bad english.
>