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Date: Sun, 16 Feb 2025 16:27:00 +0100
Message-ID: <CAHnbEGJ0PmtG7dCWQyVFasY0tSZVow1Gp61nDeMn=BK3U42Xxw@mail.gmail.com>
Subject: Re: Cygwin sparse file support: Please support fcntl(..., F_FREESP,
 ...)
To: cygwin AT cygwin DOT com
From: Sebastian Feld via Cygwin <cygwin AT cygwin DOT com>
Reply-To: Sebastian Feld <sebastian DOT n DOT feld AT gmail DOT com>
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On Sat, Feb 15, 2025 at 4:15 PM Cedric Blancher via Cygwin
<cygwin AT cygwin DOT com> wrote:
>
> Good afternoon!
>
> Could Cygwin 3.6 please support fcntl(...,F_FREESP,...) and
> cntl(...,F_FREESP64,...), as specified in
> https://docs.oracle.com/cd/E19253-01/816-5167/fcntl-2/index.html
>
> Lots of older software from Solaris, SUPER/UX, CrayOS use F_FREESP for

QNX and AIX support F_ALLOCSP and F_FREESP

> punching a hole into a file, and IMO it'll be nice if this works for
> Cygwin out of the box.

+1

Please also add F_ALLOCSP and F_ALLOCSP64 to allocate space in a file.
Like F_FREESP and F_FREESP64 it takes a struct flock/flock64, so it's
a pretty straightforward API.

Sebi

--
Sebastian Feld - IT security consultant

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