[cups] Query regarding setting up common Interface for print jobs

[Johannes Meixner]

Hello,

On Aug 10 18:59 Brian Potkin wrote (excerpt):
>>> The OP wants to discriminate between submitted files based on which
>>> *application* they came from. In the most general case this is most
>>> likely not doable. Narrowing it down to particular applications might
>>> produce a solution.
...
> Evince and Firefox both send a PDF to the printing system. Both PDFs are
> generated by Cairo. How does one distinguish between the applications
> which are used to send "My cooking recipes"?

If one can specify different print job options in the
print settings for each application for example
so that Firefox submits a print job like
   lp -o myapplication=firefox ...
and Evince submits a print job like
   lp -o myapplication=evince ...
then those additional application-specific print job
options are available to all filters in argv[5].

Because the usual filters ignore unknown print job options
only a special selfmade filter could do "the right thing".


Kind Regards
Johannes Meixner
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