desktop-packages team mailing list archive

[Till Kamppeter <1412729@xxxxxxxxxxxxxxxxxx>]

Attached patch adds the code needed (~10 lines) to download the license
text from a URL linked in the driver record from OpenPrinting. The
download is a text file and treated as such, so no security risk by the
extra download. This patch fixes this bug.

** Patch added: "support-licensetext-in-separate-url.patch"
   https://bugs.launchpad.net/ubuntu/+source/system-config-printer/+bug/1412729/+attachment/4302257/+files/support-licensetext-in-separate-url.patch

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https://bugs.launchpad.net/bugs/1412729

Title:
  system-config-printer crashes when assigning a downloadable non-free
  Epson driver to a detected printer

Status in system-config-printer package in Ubuntu:
  In Progress
Status in system-config-printer source package in Trusty:
  New
Status in system-config-printer source package in Utopic:
  New

Bug description:
  If a newer Epson printer which is not (yet) supported by Gutenprint is
  connected and set up, system-config-printer crashes when it finds the
  appropriate driver package from Epson via OpenPrinting. This is due to
  the fact that the Epson driver entries on the OpenPrinting web site do
  not contain the long license textst inline but in one centralized text
  file on Epson's web site. The driver entries only contain links to
  this file.

  system-config-printer does only support inline license texts and
  crashes on this kind of driver entries.

  [Impact]

  Users of newer Epson inkjet printers are not able to set up their
  printers because system-config-printer crashes when choosing such a
  printer in the list of detected printers.

  [Test Case]

  If you do not have one of the mentioned printers, create a file named
  /usr/lib/cups/backend/testbackend containing the line

  echo 'direct usb://EPSON/XP-215%20217%20Series "EPSON XP-215 217
  Series" "EPSON XP-215 217 Series"
  "MFG:EPSON;CMD:ESCPL2,BDC,D4,D4PX,ESCPR2;MDL:XP-215 217
  Series;CLS:PRINTER;DES:EPSON XP-215 217 Series;" ""'

  and make it world-readable and -executable:

  sudo chmod a+rx /usr/lib/cups/backend/testbackend

  This emulates an Epson XP-215/217 printer on USB, at least for CUPS'
  printer discovery facility.

  Start system-config-printer and click the "Add" button. In the printer
  setup wizard choose the Epson XP-215 217 Series printer under the
  detected printers. There will pop up "Searching driver" messages
  several times but in the end system-config-printer crashes.

  With the proposed packages for Utopic and Trusty the driver selection
  screen will appear offering to download Epson's driver for this
  printer and after accepting the license the driver gets installed and
  the printer set up with this driver.

  [Regression Potential]

  Regression potential is low, as the fix only affects the code for
  retreiving the driver database record from OpenPrinting and displaying
  it on the driver selection screen. All other functionality of system-
  config-printer is unchanged.

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