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Subject: Cygwin api to punch a hole into a file?
To: cygwin AT cygwin DOT com
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From: Cedric Blancher via Cygwin <cygwin AT cygwin DOT com>
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Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

Linux has fallocate(fd, FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, ...)
to punch a hole into a file, i.e. deallocate the blocks given and make
the file a "sparse file".

But how can I do that with the Cygwin API? Does anyone have an example
for Cygwin, which is the Win equivalent to Linux fallocate(fd,
FALLOC_FL_PUNCH_HOLE|FALLOC_FL_KEEP_SIZE, 1048576, 2097152);?

I tried with Cygwin 3.5, but the file was not sparse after that.

Ced
-- 
Cedric Blancher <cedric DOT blancher AT gmail DOT com>
[https://plus.google.com/u/0/+CedricBlancher/]
Institute Pasteur

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