[Bug 1099420] Re: "starting" hook doesn't work as expected

[Steve Langasek]

I'm afraid you've misunderstood the semantics here. It's "start on
starting", not "run on starting"; once the job is considered "started"
by upstart, the network-interface job can continue - and unless you
specify 'task', the job is started as soon as the 'script' is running.

You also haven't taken into account here that network-interface has an
'instance'.  This means that your job will only block the /first/
network interface. For an example of how to do this currently, see the
network-interface-security job in Ubuntu.

** Changed in: upstart (Ubuntu)
       Status: New => Invalid

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Title:
  "starting" hook doesn't work as expected

Status in “upstart” package in Ubuntu:
  Invalid

Bug description:
  I need to run an important shell script before the network is
  configured. I created the following test job "before-net.conf":

  description "Hook tester to start before network-interface"

  start on starting network-interface

  script
      set -x
      exec > /dev/.initramfs/before-net.log 2>&1

      # long operation
      date +%H:%M:%S.%N
      sleep 10
      date +%H:%M:%S.%N
  end script

  I also modified network-interface.conf to also write a log to
  /dev/.initramfs/network-interface-$INTERFACE.log. According to
  documentation, before-net.conf will be executed synchronously before
  network-interface. But it doesn't.

  Logged time:

  13:50:11.450185264: before-net.conf is starting
  13:50:11.522017582: "lo" is to be configured
  13:50:11.530957266: "eth0" is to be configured
  13:50:11.532905558: "eth1" is to be configured
  13:50:21.506887517: before-net.conf has finished

  I can conclude that "network-interface" doesn't execute "before-net"
  synchronously.

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