I was unable to get printer filtering working using the LDM_PRINTER_LIST or PRINTER_LIST environmental variables so I've solved this for my fat clients (and full-install machines) by running multiple instances of the cups service on different ports and pointing my client cups client.conf to those servers via my own CUPS_CLASS_SERVER variable in lts.conf
On the server create: /etc/cups-classroom-printers/cupsd.conf: Port 11631 ServerRoot /etc/cups-classroom-printers/class101 CacheDir /var/cache/cups-room101 RequestRoot /var/spool/cups-room101 TempDir /var/spool/cups-room101/tmp In my fat client image: cat /opt/ltsp/i386-fat/usr/local/bin/cups-class-server.sh #!/bin/bash serveraddress=$(getltscfg CUPS_CLASS_SERVER) echo "ServerName $serveraddress" > /etc/cups/client.conf lts.conf: DEFAULT_DISPLAY_MANAGER=/usr/bin/lightdm KEEP_SYSTEM_SERVICES=lightdm RCFILE_01=/usr/local/bin/cups-class-server.sh [Room101] CUPS_CLASS_SERVER=10.0.0.1:11631 [ltsp001] LIKE = Room101 [ltsp002] LIKE = Room101 Changes in printers for the group of clients are made via http://10.0.0.1:11631 and propagate to the clients without requiring a reboot as using LDM_PRINTER_LIST did. On Wed, May 14, 2014 at 2:21 PM, Nick Fenger <[email protected]> wrote: > This could be workaround for the LDM_PRINTER_DEFAULT > > lpoptions -d Default-Printer-Name-You-Want > > This script could be modified to run the command. > https://github.com/gdi2k/mac2xrandr > > ---------- Forwarded message ---------- > From: Michael Blinn <[email protected]> > Date: Fri, Dec 7, 2007 at 5:47 AM > Subject: Re: [Ltsp-discuss] Set printer dwfault & permission > To: [email protected] > > > Abu.Zahra: > > I use the following script, originally written by Peter Scheie, to set > the default printer. Unfortunately, evince doesn't respect it [UPDATE: it > does now] - most everything else does. I'm not sure how to allow an > unprivileged user restart a queue, sorry. > > Cheers, > Michael > > > #!/bin/sh > # Set default printer based on which workstation is being used > # Propers to Peter Scheie ([email protected]) > ws=$(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 <[email protected]>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 < >> [email protected]> 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 >>> [email protected] >>> Modify settings or unsubscribe at: >>> https://lists.ubuntu.com/mailman/listinfo/edubuntu-users >>> >> >> >
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