[Bug 1766126] Re: exportfs always returns success status

[amk]

Personally, I am not waiting for fix in xenial anymore. The storage is
now mounted to client directly.

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https://bugs.launchpad.net/bugs/1766126

Title:
  exportfs always returns success status

Status in nfs-utils package in Ubuntu:
  New

Bug description:
  It is impossible to determine whether exportfs command failed or
  succeeded based on the exit status:

  root at ver:~# exportfs asdf ; echo $?
  exportfs: Invalid exporting option: asdf
  0

  user at ver:~$ exportfs ; echo $?
  exportfs: could not open /var/lib/nfs/.etab.lock for locking: errno 13 (Permission denied)
  0

  Search did not reveal a duplicate bug but a similar issue was resolved upstream back in 2013:
  https://bugzilla.redhat.com/show_bug.cgi?id=966237

  root at ver:~# lsb_release -rd
  Description:	Ubuntu 16.04.4 LTS
  Release:	16.04

  root at ver:~# apt-cache policy nfs-utils
  N: Unable to locate package nfs-utils
  root at ver:~# apt-cache policy nfs-kernel-server
  nfs-kernel-server:
    Installed: 1:1.2.8-9ubuntu12.1
    Candidate: 1:1.2.8-9ubuntu12.1

  What is expected to happen: Command exits with status = 0 only in case
  of successful execution

  What happens instead: Command exit status is 0 regardless of outcome.

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