[Bug 1878955] Re: resolved dhclient-enter-hook complains about an empty file

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

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

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https://bugs.launchpad.net/bugs/1878955

Title:
  resolved dhclient-enter-hook complains about an empty file

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  When starting/using `dhclient`, it will often return an error such as:

      cmp: EOF on /tmp/tmp.yCyV6zBzhB which is empty

  This is due to the use of `cmp` in "/etc/dhcp/dhclient-enter-
  hooks.d/resolved"

  Because the $oldstate file can be empty, or different, it should use
  `cmp --quiet`

  This happens when "/run/systemd/resolved.conf.d/isc-
  dhcp-v*-$interface.conf" files do not exist, or when the content
  changes.

  This is very loosely related to
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1805183

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