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 -- 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/1690980 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 To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1690980/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
