[Bug 805423] Re: pam_motd needs a module option to disable in-line dynamic updates

[Till Klampaeckel]

Hey,

I tried your code:

1. $USER doesn't seem to be set in this context so it runs regardless.
;-) At least it doesn't seem to be set during the login.

2. Whenever I add strace, it magically works – without, it defuncts.

I looked around further and it took me a while to figure this out – so the offending code in my case is in here:
/usr/lib/python2.6/dist-packages/landscape/lib/sysstats.py

and imports getProcessOutputAndValue from here:
/usr/share/pyshared/twisted/internet/utils.py

I couldn't figure out how this would block, but essentially it looks
like you could pass callbacks to the function which is currently not
happending.

I was wondering if there is a way to debug this in Python. E.g. my
skills are currently limited to putting "print" into files. But that
doesn't work to well. ;-)

Till

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https://bugs.launchpad.net/bugs/805423

Title:
  pam_motd needs a module option to disable in-line dynamic updates

Status in Landscape Client:
  New
Status in “pam” package in Ubuntu:
  Fix Released

Bug description:
  1) lsb_release -rd
  Description:	Ubuntu 10.04.2 LTS
  Release:	10.04

  2)  Installiert: 1.1.1-2ubuntu5.3
    Kandidat: 1.1.1-2ubuntu5.3
    Versions-Tabelle:
   *** 1.1.1-2ubuntu5.3 0
          500 http://de.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
          500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages
          100 /var/lib/dpkg/status
       1.1.1-2ubuntu2 0
          500 http://de.archive.ubuntu.com/ubuntu/ lucid/main Packages

  3) Login on systems with high load/a lot of io wait via ssh should
  still be possible.

  4) On servers with high load or a lot of io wait login times out,
  because pam_motd does io intensive calculations. This hurts even more
  when using nagios check_by_ssh. There should be a way to use a cron
  job again (like update-motd did). Logging into a system is more
  important than motd.

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