[Printing-architecture] Options in /etc/cups/printers.conf

[Michael Sweet]

Filed as Apple bug:

    <rdar://problem/14401795> cups.org: xxx-default options set from lpadmin are not returned by Get-Printer-Attributes

I was able to reproduce both with lpoptions and ipptool.  I'll let you know when I have a fix...


On Jul 9, 2013, at 5:40 PM, Till Kamppeter <till.kamppeter at gmail.com> wrote:

> Hi,
> 
> I have a problem with non-PPD options set in /etc/cups/printers.conf.
> 
> For filters and cups-browsed I have defined some options foor being
> stored in /etc/cups/printers.conf which are not options of CUPS itself.
> 
> I set these options via
> 
> lpadmin -p <printer> -o <option>-default=<value>
> 
> getting a line
> 
> Option <option> <value>
> 
> in the entry of <printer>. What works is that these options get supplied
> with every job, so I can use such options to configure filters or to get
> filters into a debug mode. I am using this successfully for example with
> the "usb" CUPS backend to find quirk rules for broken USB printers.
> 
> Now I also want to use this simply to mark print queues (setting an
> option which is ignored by all filters). For example all queues created
> by cups-browsed get the cups-browsed boolean option set by doing the IPP
> equivalent of:
> 
> lpadmin -p <printer> -o cups-browsed-default
> 
> resulting in a line
> 
> Option cups-browsed true
> 
> in /etc/cups/printers.conf. This way I want that if cups-browsed not
> closed cleanly (system crash) and so did not remove the queues it
> created in the next session finds these queues and treats them
> correctly, so that crashes do not lead to ghost queues.
> 
> Now it seems that I cannot read out this option setting (without sending
> a job and checking error_log), as
> 
> lpoptions -p <printer>
> 
> does not list the option (as "cups-browsed" or "cups-browsed=true") and
> 
> val = cupsGetOption("cups-browsed", dest->num_options, dest->options)
> 
> in a C program (with dest being the record of the printer in question)
> gives val = NULL as one gets when requesting the value of a non-existing
> option.
> 
> In CUPS 1.5.x (Ubuntu Precise, 12.04 LTS) this still worked. both
> cups-browsed was able to read out the "cups-browsed" marker option from
> its queues via the C line shown above and
> 
> lpoptions -p <printer>
> 
> contains "cups-browsed=true" in its output.
> 
> I would consider this a bug in CUPS 1.6.x. Mike can you have a look? Thanks.
> 
>   Till

_________________________________________________________
Michael Sweet, Senior Printing System Engineer, PWG Chair