// unlockIfHeld will unlock a lock, if it is held by this machine, or return an error.
func unlockIfHeld(lck *lock.Lock) error {
err := lck.Unlock()
if err == lock.ErrNotExist {
return nil
} else if err == nil {
fmt.Println("Unlocked existing lock for this machine")
return nil
}
return err
}
