CUPS printer filtering on LTSP fat clients

[Nick Fenger]

This could be workaround for the LDM_PRINTER_DEFAULT

lpoptions -d Default-Printer-Name-You-Want

This script could be modified to run the command.
https://github.com/gdi2k/mac2xrandr

---------- Forwarded message ----------
From: Michael Blinn <mblinn at peopleplaces.org>
Date: Fri, Dec 7, 2007 at 5:47 AM
Subject: Re: [Ltsp-discuss] Set printer dwfault & permission
To: ltsp-discuss at lists.sourceforge.net


Abu.Zahra:

  I use the following script, originally written by Peter Scheie, to set
the default printer. Unfortunately, evince doesn't respect it [UPDATE: it
does now] - most everything else does. I'm not sure how to allow an
unprivileged user restart a queue, sorry.

Cheers,
 Michael


#!/bin/sh
# Set default printer based on which workstation is being used
# Propers to Peter Scheie (peter at scheie.homedns.org)
ws=$(echo $LTSP_CLIENT|cut -d. -f1)
case $ws in
   ws0-007 ) lpoptions -d CupsPrinterName ;;
   ws0-017 ) lpoptions -d Shared_Color_Printer ;;
   ws1-007 ) lpoptions -d OtherCupsPrinter ;;
   # and so on for the library workstations

   # now assign printers for the lab workstations
   # ws013 ) lpoptions -d lab_printer ;;
   # ws014 ) lpoptions -d lab_printer ;;
   # and so on
esac

### End of script


On Wed, May 14, 2014 at 1:32 PM, Nick Fenger <nick.fenger at gmail.com> wrote:

> Veli-Matti et al,
>
> Have you/anyone figured out how to read the LDM_PRINTER_LIST setting from
> lts.conf with fat clients?
>
> In a thin client setup, I notice PRINTER_LIST is passed when XSession is
> started, which is not the case with fat clients.
>
> ltsp005   1000  0.0  0.0  12312   272 ?        Ss   May13   0:00 bash -c
> XDG_DATA_DIRS=/tmp/ltsp-localapps-ltsp005-BFCbvt/:/usr/local/share/:/usr/share/
> LTSP_CLIENT=10.0.40.103 LTSP_CLIENT_HOSTNAME=ltsp005
> *PRINTER_LIST=LEP-Room-205,The-Printer-In-This-Room*LIBGL_ALWAYS_INDIRECT=true LC_ALL=en_US.UTF-8 LANGUAGE=en_US.UTF-8
> LANG=en_US.UTF-8 DISPLAY=10.0.40.103:7  PULSE_SERVER=tcp:10.0.40.103:4713ESPEAKER=
> 10.0.40.103:16001 LTSP_ALSA_DEFAULT=pulse */etc/X11/Xsession* "default" <
> /dev/null > /dev/null ; /usr/sbin/ltspfsmounter all cleanup
>
>
>
>
> On Thu, May 5, 2011 at 6:48 AM, Veli-Matti Lintu <
> veli-matti.lintu at opinsys.fi> wrote:
>
>> Hello everyone,
>>
>> I'd have a quick question about the CUPS printer filtering patch that is
>> in the Ubuntu CUPS version (the patch can be found at least here:
>> http://patches.ubuntu.com/by-release/extracted/ubuntu/c/cups/1.4.1-5ubuntu2/printer-filtering.dpatch
>> )
>>
>> If I understand correctly, it is used on LTSP systems by adding
>> LDM_PRINTER_LIST setting in lts.conf which is then turned to PRINTER_LIST
>> environment variable when the user logs in. The patch above then filters
>> not listed printers out from the user's printer list.
>>
>> As here we are running quite a few fat clients that have their own local
>> USB printers, we changed from configuring fat clients to use LTSP server's
>> cups via /etc/cups/client.conf and instead run a local CUPS server on the
>> fat clients. The CUPS server on the LTSP server broadcasts printer
>> information to the LTSP network and the local CUPS processes on the fat
>> clients then pick up the printers from the broadcasts. CUPS adds local USB
>> printers automatically and they don't need to be configured through server
>> lts.conf. Of course they are not usable by other users in the network, but
>> it's not a problem.
>>
>> This works nicely as long as we want to show all printers to the user. In
>> bigger environments where a cluster of servers serves many schools, this
>> doesn't work so nicely and that's where the LDM_PRINTER_LIST setting helps.
>> The problems come when we want to show also the local USB printers that
>> CUPS configures automatically when they are attached. As the
>> LDM_PRINTER_LIST doesn't include the local printers, they are always
>> filtered out from the printer list.
>>
>> We've been now doing some test patches to filter out only printers that
>> are not local, but I'd be interested to know if anyone else has tried using
>> a setup like this? The same filtering could be also applied to laptops if
>> the PRINTER_LIST env variable is set somewhere when the user logs in.
>>
>> Ideas? Comments?
>>
>> Veli-Matti
>>
>> --
>> edubuntu-users mailing list
>> edubuntu-users at lists.ubuntu.com
>> Modify settings or unsubscribe at:
>> https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
>>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/edubuntu-users/attachments/20140514/ea78f733/attachment.html>