[corinna-cygwin@cygwin.com: Re: ENOTSOCK errors with cygwin dll 1.3.21 and 1.3.22]

Corinna Vinschen vinschen@redhat.com
Mon May 26 16:44:00 GMT 2003


On Mon, May 26, 2003 at 11:57:00AM -0400, Pierre A. Humblet wrote:
> At 05:27 PM 5/26/2003 +0200, Corinna Vinschen wrote:
> >Yes, I think so.  Why shouldn't a file become sparse when the accessing
> >application are going to create holes by seeking beyond EOF?   That's
> >the only situation in which this might happen.
> 
> I have no strong opinion here. I simply noticed the difference between
> Vaclav Haisman's original method and your way. How do other Unix do it? 

I don't know.  First of all sparseness is a property of the file system.
I don't see any call on Linux to influence that.  Either a file is sparse
or it isn't and that's entirely controlled by the FS driver, FWICT.  So
from my point of view it's entirely ok to do it like that.

> >>    show up. So it may be paranoia.
> >
> >You can test this, can't you?
> 
> Not in practice. I would have to install my corporate VPN software on
> my antique Win95, with a high likelihood of headache and wasted day.

I've tested to read the file attributs of a sparse file on my XP system
from a 98SE VM.  The sparse attribute is not propagated to that system.
So I guess we're on the bright side.

Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin@cygwin.com
Red Hat, Inc.



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