[Bug 1820886] Re: Potential inconsistency due to system halt/reboot being allowed when package installation in progress

[Julian Andres Klode]

Installed 1.8.1, running reboot as a user is inhibited:

$ reboot
Operation inhibited by "APT" (PID 3208 "apt", user root), reason is "APT is installing or removing packages".
Please retry operation after closing inhibitors and logging out other users.
Alternatively, ignore inhibitors and users with 'systemctl reboot -i'.

As root it obviously is not, as inhibitors are ignored, nothing we can
do about that now.

** Tags removed: verification-needed-disco
** Tags added: verification-done-disco

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https://bugs.launchpad.net/bugs/1820886

Title:
  Potential inconsistency due to system halt/reboot being allowed when
  package installation in progress

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  New
Status in apt source package in Bionic:
  New
Status in apt source package in Cosmic:
  New
Status in apt source package in Disco:
  Fix Committed

Bug description:
  [System]
  Any current Ubuntu Desktop/Server supported release (Trusty, Xenial, Bionic, Cosmic).

  [Impact]
  Package installation turns into an inconsistent state if system is rebooted in the middle of an apt install/upgrade.

  [Test Case]
  1. User1 at Ubuntu box issues "sudo apt-get upgrade";
  2. User2 at Ubuntu box issues "shutdown -r" or reboots it using the GUI;
  3. System reboots and potentially turns into an inconsistent state.

  [Remarks]
  APT should automatically inhibit system halts/reboots while packages being installed/removed. A similar behavior to what is shown by unattended-upgrades.

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