Simple custom driver for text-based print queue

[Helge Blischke]

David wrote:

> Hello,
> 
> I have a couple of labelprinters that are defined in CUPS as "raw" print
> queues or using the Generic/Text-only "driver".
> 
> We are sending print commands (ASCII files) directly to the printers,
> everything working fine so far.
> 
> Now I want to have a custom printer driver in CUPS that manipulates the
> file sent to the printer. I want to replace some characters in the print
> job. I am able to write a simple shell/perl script that would do this, but
> I have no idea how I can get this done in CUPS or how to integrate a shell
> script that can read the print job, modify and spool it out again to the
> printer.
> 
> Does anyone of you have ideas or recommendations or even examples to start
> with?
> 
> I am using cups 1.3.8 at the moment.
> 
> Thanks in advance,
> David.

Write a script (shell, Perl, Python or whatever) which does the required 
manipulations and attach it to the print queue via the lpadmin command with 
the "-i path_to_interface_script" option.

Note that the interface script follows the same conventions as filters with 
respect to input, output, and command line options as ordinary filters (see 
man filter).

Helge