CUPS PS preprocessing filter

Bernd Krumböck b.krumboeck at rewe-group.at
Fri Mar 7 02:07:52 PST 2008


Set "LogLevel debug" please.
Maybe "set -e" will also help to detect problems.

regards!
Bernd


> Hi,
>
> following resources on this forum I added a PS preprocessing filter with a search & replace functionality:
>
> 1. Add a new mime type application/postscript-prefiltered to /etc/cups/mime.types by appending the following line:
>
>    application/postscript-prefiltered
>
> 2. Insert an additional line in /etc/cups/mime.convs. Modify the pstops line as follows:
>
>    application/postscript application/postscript-prefiltered 10 PsPrefilter
>    application/postscript-prefiltered application/vnd.cups-postscript 66 pstops
>
> 3. Create custom filter /usr/lib/cups/filter/PsPrefilter
>
>  #! /bin/bash
>  # see http://localhost:631/spm.html#WRITING_FILTERS
>  # debug info in /var/log/cups/error_log
>  set -x
>  # have the input at fd0 (stdin) in any case
>  [ -n "$6" ] && exec <"$6"
>  # prefiltering
>  sed 's|STRING_A|STRING_B|g'
>
> 4. Restart CUPS
>
> 4. print PS test file
>
> 5. verify that PSPrefilter has been applied - /var/log/cups/error_log
>
>    I [06/Mar/2008:21:53:17 +0000] Adding start banner page "none" to job 27.
>    I [06/Mar/2008:21:53:17 +0000] Adding end banner page "none" to job 27.
>    I [06/Mar/2008:21:53:17 +0000] Job 27 queued on 'uk_is_gen2_bm' by 'root'.
>    I [06/Mar/2008:21:53:17 +0000] Started filter /usr/lib/cups/filter/PsPrefilter (PID 23063) for job 27.
>    I [06/Mar/2008:21:53:17 +0000] Started filter /usr/lib/cups/filter/pstops (PID 23064) for job 27.
>    I [06/Mar/2008:21:53:17 +0000] Started filter /usr/lib/cups/filter/foomatic-rip (PID 23065) for job 27.
>    I [06/Mar/2008:21:53:17 +0000] Started backend /usr/lib/cups/backend/lpd (PID 23066) for job 27.
>
> However STRING_A is not replaced. Any input is appreciated.
>
> Thanks already,
> Asbjorn
>
>
>





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