linux-kernel - Re: Man page doc for SEEK_DATA/SEEK

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Message-ID: <CAKgNAki0CtE6a_JLjPUsyozP2cfy_x8MSSYfhu5gMEeRE6Zaww@mail.gmail.com>
Date:	Tue, 20 Sep 2011 07:24:24 +0200
From:	Michael Kerrisk <mtk.manpages@...il.com>
To:	Eric Blake <eblake@...hat.com>
Cc:	Josef Bacik <josef@...hat.com>, linux-man@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Man page doc for SEEK_DATA/SEEK_HOLE

Hello Eric

On Mon, Sep 19, 2011 at 7:57 PM, Eric Blake <eblake@...hat.com> wrote:
> On 09/18/2011 01:07 AM, Michael Kerrisk wrote:
>>
>> +
>> +.BR SEEK_DATA
>> +and
>> +.BR SEEK_HOLE
>> +are nonstandard extensions also present in Solaris.
>
> Looks good to me, but you may also want to link to the proposed wording for
> mandating SEEK_HOLE/SEEK_DATA in the eventual POSIX Issue 8 (POSIX 2008 is
> Issue 7):
> http://austingroupbugs.net/view.php?id=415
>
> Also, it seems a shame that the kernel can fail with EINVAL instead of
> properly emulating SEEK_HOLE and SEEK_DATA even on file systems with no
> underlying support for reporting holes.

Thanks for catching that. I've added that point.

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface"; http://man7.org/tlpi/
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