[Bug 1690980] Re: unattended-upgrades does not block shutdown of system, as it is designed to

[Balint Reczey]

Instead of providing the drop-in and placing it in u-u's preinst I think
it would be better to fix apt instead.

Apt already exits on SIGUSR1 thus even when u-u is not installed this
seems to work correctly.

I've uploaded apt and u-u for testing to ppa:rbalint/scratch, please
give them a try.

Please upgrade apport in advance because the failure seems to be
unrelated, but I'm going to check it again.

** Patch added: "Patch against apt"
   https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1690980/+attachment/4920960/+files/0001-Kill-apt-daily-upgrade.service-using-SIGUSR1.patch

** Also affects: apt (Ubuntu)
   Importance: Undecided
       Status: New

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Title:
  unattended-upgrades does not block shutdown of system, as it is
  designed to

Status in OEM Priority Project:
  Triaged
Status in OEM Priority Project xenial series:
  New
Status in apt package in Ubuntu:
  New
Status in unattended-upgrades package in Ubuntu:
  Confirmed

Bug description:
  Title: No pop-up window to warn users that system should not reboot or
  shutdown while installing security updates

  Summary:
  No pop-up window to warn users that system should not reboot or shutdown while installing security updates

  Steps:
  1. trigger unattended-upgrades
  2. reboot or shutdown system while installing packages

  Expected results: There is a pop-up window to warn users that system
  should not reboot or shutdown

  Actual results: There is no pop-up window to warn users

  Additional information:
  $ apt-cache policy unattended-upgrades
  unattended-upgrades:
    Installed: 0.90
    Candidate: 0.90ubuntu0.5
  $ lsb_release -rd
  Description:    Ubuntu 16.04 LTS

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