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[Bug 862559] Re: Does not set PAM_XDISPLAY and or XDISPLAY, XAUTHORITY variables

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: Sebastien Bacher <seb128@xxxxxxxxxx>
Date: Tue, 25 Oct 2011 16:58:05 -0000
Reply-to: Bug 862559 <862559@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: lightdm (Ubuntu)
   Importance: Medium => Low

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https://bugs.launchpad.net/bugs/862559

Title:
  Does not set PAM_XDISPLAY and or XDISPLAY, XAUTHORITY variables

Status in Light Display Manager:
  Triaged
Status in “lightdm” package in Ubuntu:
  Triaged

Bug description:
  If a PAM module with GUI interface for alternative authentication
  methods (like fingerprint authentication) is used, this module needs
  information about the xdisplay to connect to for showing up it's
  widget. Therefore PAM has two enviroment variables to be setup by the
  application before calling the "pam_authenticate" function. These
  variables are PAM_XDISPLAY and PAM_TTY, both to be set to the current
  display number (e.g. ":0"). Alternatively the environment variables
  XDISPLAY and XAUTHORITY can be set, so the PAM module can get the
  information by calling "getenv()".

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