[Bug 1622025] [NEW] running /sbin/restart with no arguments restarts services

[Jean-Sebastien Legare]

Public bug reported:

Accidentally ran `/sbin/restart` (symlink to `/sbin/initctl`) without
arguments as my regular user, and unity was restarted (possibly amongst
other things). I would expect it to exit immediately with an error code,
given its usage and manpage (initctl (8)).

Easy to reproduce.

~$ dpkg -S `which restart`
upstart: /sbin/restart

~$ restart --help
Usage: restart [OPTION]... JOB [KEY=VALUE]...
Restart job.
...

~$ restart
unity7 start/killed, process 12622


== Environment ==

~$ lsb_release -rd
Description:	Ubuntu 16.04 LTS
Release:	16.04

~$ apt-cache policy upstart
upstart:
  Installed: 1.13.2-0ubuntu21
  Candidate: 1.13.2-0ubuntu21.1
  Version table:
     1.13.2-0ubuntu21.1 500
        500 http://ca.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
 *** 1.13.2-0ubuntu21 500
        500 http://ca.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status

** Affects: upstart (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: xenial

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https://bugs.launchpad.net/bugs/1622025

Title:
  running /sbin/restart with no arguments restarts services

Status in upstart package in Ubuntu:
  New

Bug description:
  Accidentally ran `/sbin/restart` (symlink to `/sbin/initctl`) without
  arguments as my regular user, and unity was restarted (possibly
  amongst other things). I would expect it to exit immediately with an
  error code, given its usage and manpage (initctl (8)).

  Easy to reproduce.

  ~$ dpkg -S `which restart`
  upstart: /sbin/restart

  ~$ restart --help
  Usage: restart [OPTION]... JOB [KEY=VALUE]...
  Restart job.
  ...

  ~$ restart
  unity7 start/killed, process 12622


  == Environment ==

  ~$ lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  ~$ apt-cache policy upstart
  upstart:
    Installed: 1.13.2-0ubuntu21
    Candidate: 1.13.2-0ubuntu21.1
    Version table:
       1.13.2-0ubuntu21.1 500
          500 http://ca.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
   *** 1.13.2-0ubuntu21 500
          500 http://ca.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

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