While the OPs code makes little sense, your comment isn't all that clear either. There's no losing the race with flock. The flock is blocking. If someone else gets the lock first, the current process will politely wait till the other is done, and then it gets turn, while no other process using the semaphore will interfere.

Now, I've big questions about any of the OPs code that isn't involved in the locking - but I don't see a problem with the locking in itself.

In reply to Re^2: Race conditions by JavaFan
in thread Race conditions by toniax

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