[cups.general] Writing Filters - Permission denied

[Lukas Thiemeier]

Problem solved:
Even though I disabled SELinux for Cups, I had to change the Filters User,
Role and Type. After that, everything went fine.

Thanks.


On Wed, 29 Aug 2007, Helge Blischke wrote:

> Lukas Thiemeier wrote:
>>
>> Hello there,
>>
>> I've a problem running my own Cups-filters.
>>
>> The Filter itself works just fine. I've changed the mime.convs to make
>> Cups use it, and the Printers output is great.
>> (mime.convs: text/plain application/vnd.cups-postscript 33 a2ps_wrapper)
>>
>> But i do not want to use this filter for ever printer, but only for one
>> single queue.
>> So I changed back the mime.convs Entry to use texttops, and changed my
>> queues ppd in /etc/cups/ppd:
>> new Entry in test.ppd:
>>     *cupsFilter: "text/plain 33 a2ps_wrapper"
>>
>> When I now print on this queue, Cups tries to start the correct Filter,
>> but is not able to. The error.log says:
>>
>> I [23/Aug/2007:18:14:58 +0200] [Job 3331] Started filter
>> /usr/lib/cups/filter/a2ps_wrapper (PID 16734)
>> D [23/Aug/2007:18:14:58 +0200] Discarding unused job-state event...
>> D [23/Aug/2007:18:14:58 +0200] cupsdProcessIPPRequest: 26 status_code=0
>> (successful-ok)
>> D [23/Aug/2007:18:14:58 +0200] [Job 3331]
>> /usr/lib/cups/filter/a2ps_wrapper: Permission denied
>> E [23/Aug/2007:18:14:58 +0200] PID 16734
>> (/usr/lib/cups/filter/a2ps_wrapper) stopped with status 22!
>> D [23/Aug/2007:18:14:58 +0200] [Job 3331] File 0 is complete.
>> E [23/Aug/2007:18:14:58 +0200] [Job 3331] Job stopped due to filter errors.
>>
>> The whole World may read and execute the Filter, and if i start it from
>> the commandline as root or as user lp, its just fine.
>>
>> Do I have to introduce the Filter to Cups in some way? Or Do you have
>> any other ideas? For me, the most confusing part of this Problem is,
>> that the Filter works perfectly if I put it in mime.convs, but Cups has
>> no permissions to start it using the PPD-Entry.
>>
>> Thanks for your Help, and excuse my bad English, please :)
>>
>> greetings, Lukas Thiemeier
>>
>>
>
> You need to make the execute permissions for
> your filter suitable for user lp (or whatever
> the CUPS filters run under on your system).
>
> Helge
>
> -- 
> Helge Blischke
> Softwareentwicklung
>
> H.Blischke at acm.org
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