[Bug 1758438] Re: systemd can't be removed from a chroot

[Francis Ginther]

** Tags added: id-5ab94347925723c2b2bf3943

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Title:
  systemd can't be removed from a chroot

Status in systemd package in Ubuntu:
  Fix Committed
Status in systemd source package in Bionic:
  Fix Committed

Bug description:
  The systemd package has the following code in its prerm:

  if [ "$1" = "remove" ] && [ -d /run/systemd/system ]; then
      echo "systemd is the active init system, please switch to another before removing systemd."
      exit 1
  fi

  However, /run/systemd/system will exist even in a chroot, and an init
  system is not needed in a chroot.  The maintainer script should
  include a check for whether we're running in a chroot, to allow
  systemd to be removed when it's not needed and there is no harm.

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