I'll give it a shot and report back.  However the code in u-s-s is
checking against a FD as if it's an errval or retval and so if it's >0,
it bails when it's a legit FD.

Either way - I'll try to do this tomorrow and report back.

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to unattended-upgrades in
Ubuntu.
https://bugs.launchpad.net/bugs/1843099

Title:
  Unattended upgrades does not work on shutdown

Status in unattended-upgrades package in Ubuntu:
  Incomplete

Bug description:
  1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> 
About Ubuntu
   * Ubuntu Xenial 16.04.6 LTS
  2) The version of the package you are using, via 'apt-cache policy pkgname' 
or by checking in Software Center
   * 1.1ubuntu1.18.04.7~16.04.3
  3) What you expected to happen
   * Packages to be upgraded on reboot / shutdown.
  4) What happened instead
   * The host just rebooted.  Didn't perform upgrades.  No useful output either 
until I enabled debug logging in the systemd unit file.

  I'm reporting a new bug but this is very similar to #1806487 and I'm
  actually wondering if it resurfaced somehow.

  We're running Ubuntu Xenial 16.04.6 which has
  1.1ubuntu1.18.04.7~16.04.3 installed.

  I see that #1806487 was resolved with 1.1ubuntu1.18.04.7~16.04.2.
  However I'm seeing similar behavior.

  So far I've modified systemd to see if anything stands out.  I do have
  an strace and then just debug mode.

  Unless needed, simply put, this is what a reboot with debug logging
  looks like (i.e. unattended-upgrades-shutdown.log):

  2019-09-06 09:20:04,871 DEBUG - Waiting for signal to start operation
  2019-09-06 09:20:43,996 WARNING - SIGTERM or SIGHUP received, stopping 
unattended-upgradesonly if it is running
  2019-09-06 09:20:43,996 DEBUG - Starting countdown of 25.0 minutes
  2019-09-06 09:20:43,997 DEBUG - get_lock returned 7
  2019-09-06 09:20:43,997 DEBUG - lock not taken

  I hope that helps, please let me know if you need anything else from
  me or if I can provide any more information.

  I've done this many times before, this is the first time it hasn't
  worked.  When I patched around the end of May, all went well.  My
  other variants worked, well mainly Trusty but that's EOL for public
  access.  Bionic doesn't seem to have anything it needs to update.

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