Re: [PATCH 1/2] fs: add SEEK_HOLE and SEEK_DATA flags

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On 2011.04.22 at 00:50 -0400, Christoph Hellwig wrote:
> [Eric: please don't drop the Cc list, thanks!]
> 
> On Thu, Apr 21, 2011 at 09:22:55PM -0400, Josef Bacik wrote:
> > > since all files have a virtual hole at the end, but leaves the position
> > > unchanged). ??I'd have to write a test program on Solaris to see whether that
> > > definition is actually true, or if it is a bug in the Solaris man page.
> > >
> > 
> > lseek's purpose is to reposition the file position, so I'd imagine
> > this is just a bug in the man page.
> 
> I would be surprised if the bug is around for such a long time, but
> otherwise I concur.

It's a bug. Let me quote what Jeff Bonwick wrote on his blog:

»I'm not sure where you got the impression that either SEEK_HOLE or
SEEK_DATA doesn't set the file pointer. They do. (If they didn't, that
would be weird, and we'd call it out explicitly.)«

http://blogs.sun.com/bonwick/entry/seek_hole_and_seek_data

-- 
Markus
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