The synchronisation example in 11.6 doesn't work

[David Ireland]

It's claim that this, will obtain a lock

pre-start script
  # "lock"
  start synchronise || true
end script

but obviously, if the lock service is already running, it will still succeed. I.e. this will succeed without obtaining the lock.

[David Ireland (e-david)]

You could do something like this instead:

pre-start script
  # "lock"
  until start synchronise; do sleep 1; done
end script