As long as your writes are below one page of data (2k is safe), then with most filesystems your writes are atomic and no locking synchronization is needed. That looks like it is true in this case.

If locking synchronization is needed, then flock is not necessarily the right place to start looking because (depending on the filesystem) it can be highly unreliable.

In reply to Re^3: Append to text file not working by tilly
in thread Append to text file not working by greymoose

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