[cups.general] how to add custom postscript at the head

[Helge Blischke]

Evert Mouw wrote:

> I need to add custom postscript commands to get documents to print.
> Something like:
> 
> %!OCE *JEC BEGIN
> %!OCE somerandomstuff
> %!OCE *JEC BODY
> %!PS-Adobe-3.0
> 
> So, even before the PS-Adobe line.
> 
> I was playing a bit with the PPD file and downloaded the PPD specs. It's
> stupid, I tried for hours, but I could not find out how to do this,
> although it should be simple...
> 
> Any hints?
> 
> Thanks, Evert

If the "somerandomstuff" only depends on the printer, not on the individual 
jobs, you could put the lines as a value to the 
*JCLBegin:
keyword into the printr's PPD.

Otherwise you need to write a filter which computes the "somerandonstuff" 
from the job data and/or the job attributes (or whatever sources you need to 
consider) and force use of this filter by the PPD statement
*cupsFilter: "application/vnd.cups-postscript 0 yourfilter"
and put this filter into the /usr/lib/cups/filter directory.

Helge