[Bug 1429938] Re: reboot does not return under systemd

[Jason Gerard DeRose]

I reworked the description as my original assessment was quite off.

But after more thought, I think this behavior change is something that
really needs mentioning in the Vivid releases notes.

After all, the perceived "correct" behavior of a system strongly tends
toward what the actual behavior has been historically.

Yet one of these kids is clearly not like the other :D

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Title:
  reboot does not return under systemd

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  If you send a shutdown or reboot command over SSH to a Trusty or
  Utopic host, the command will consistently finish successfully prior
  to the SSH connection being closed, meaning your SSH client will exit
  with a return-code of zero:

  For example:

  $ ssh root at myhost shutdown -h now
  $ echo $?
  0

  Or

  $ ssh root at myhost reboot
  $ echo $?
  0

  However, on Vivid now that the switch-over to systemd has happened,
  running the same consistently results in the abrupt closure of the SSH
  connection prior to the command finishing, meaning your SSH client
  will exit with a return-code of 255:

  $ ssh root at my_vivid_host shutdown -h now
  Connection to localhost closed by remote host.
  $ echo $?
  255

  Although in retrospect is was a bit naive for me to rely on this
  (actually quite fragile) behavior, it had at least been consistent in
  Ubuntu for some time (back to at least Raring from my personal
  experience, but likely back even farther).

  This isn't technically a systemd bug, but I still think it's something
  worth mentioning in the release notes as I bet I'm not the only person
  who built some "clever" hacks around the previous behavior :P

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