>> also add a way to say "discard this byte-range, creating holes where
>> possible", with semantics equivalent to overwriting with zeros
>> except with respect to holes.
> IIRC there is an fcntl that does that.

I just looked through (nroff output for) (what I think is) -current's
fcntl.2 (fcntl.2,v 1.31) and don't see any such thing there.

Am I missing something?

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