Date:	Sun, 16 Jan 2000 10:49:39 +0200 (IST)
From:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
X-Sender:	eliz AT is
To:	Martin Stromberg <Martin DOT Stromberg AT lu DOT erisoft DOT se>
cc:	djgpp-workers AT delorie DOT com
Subject:	Re: _lleek
In-Reply-To:	<200001130902.KAA13971@spica-144.lu.erisoft.se>
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On Thu, 13 Jan 100, Martin Stromberg wrote:

> The problem is that the INT21 call registers used for offset (input
> and output) is totally only 32 bits, so we have this mapping: 
> register contents -> offset
> 0			0
> .			.
> .			.
> .			.
> 2^32-2			2^32-2
> 2^32-1			-1 (failure)
> 
> So my tests showed calling lseek(fd, -2, SEEK_SET) would result in the
> file growing to maxsize (as if lseek(fd, 2^32-2 , SEEK_SET) was
> called). Please try this and verify my findings, if possible.

Unfortunately, I don't have any access to a system with FAT32 volumes
(FAT32 considerably slows down disk I/O, so I routinely refuse
Windows's suggestion to convert).

So, if I understand correctly, you are suggesting to implement lseek
of -2 as lseek of -3 followed by lseek of +1, is that right?

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