[Bug 1803530] Re: [Xenial][udev] postinst script should use "invoke-rc.d stop" instead of "systemctl stop"

[Dan Streetman]

please reopen if this is still an issue

** Changed in: systemd (Ubuntu)
       Status: New => Invalid

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Title:
  [Xenial][udev] postinst script should use "invoke-rc.d stop" instead
  of "systemctl stop"

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  In order to respect the local initscript policy layer that may be
  present in /usr/sbin/policy-rc.d, the postinst script of the udev
  package should use "invoke-rc.d stop" instead of "systemctl stop".

  This direct systemctl call can be found in the handle_service_rename()
  function :

  handle_service_rename() {
    if dpkg --compare-versions "$2" lt "204-1"; then
      if [ -d /run/systemd/system ]; then
        systemctl stop udev.service udev-control.socket udev-kernel.socket >/dev/null 2>&1 || true
      fi
    fi
  }

  Using "systemctl stop" during unattended-upgrades in shutdown mode
  hangs and leaves the dpkg database in a broken state after reboot.
  Using a local initscript policy layer that prevents start/stop/restart
  actions on this case is a way to prevent those hangs but maintainer
  scripts have to use invoke-rc.d instead of direct systemctl calls.

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