Perfect. Thank you. I grabbed File::lockf and was indeed able to see that lockf with a "+<" mode open exactly replicates the visudo locking. I had never ventured into deeply enough into file-locking to learn of the multiple APIs and their differences.

Regards,
Adam

In reply to Re^2: With a fcntl lock, why this lsof output? by welchavw
in thread With a fcntl lock, why this lsof output? by welchavw

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