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Date:	Fri, 14 Feb 2025 15:45:16 +0100
To:	cygwin AT cygwin DOT com
Subject:	Re: SEEK_DATA should fail at EOF (was: coreutils-9.6-1 (TEST): cp:
	infinite SEEK_SET/DATA/HOLE loop if file is compressed)
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From:	Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>
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Cc:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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On Feb 14 14:14, Corinna Vinschen via Cygwin wrote:
> On Feb 14 13:49, Corinna Vinschen via Cygwin wrote:
> > On Feb 14 12:24, Christian Franke via Cygwin wrote:
> > > Hmm... does "beyond" mean '>=' or '>' ?
> > 
> > ...do you think this fixes it?
> > 
> > diff --git a/winsup/cygwin/fhandler/base.cc b/winsup/cygwin/fhandler/base.cc
> > index 8f3dbd4ed51a..79dfaaa5987a 100644
> > --- a/winsup/cygwin/fhandler/base.cc
> > +++ b/winsup/cygwin/fhandler/base.cc
> > @@ -1144,7 +1144,7 @@ fhandler_base::lseek (off_t offset, int whence)
> >  	    return -1;
> >  	  }
> >  	/* Per Linux man page, ENXIO if offset is beyond EOF */
> > -	if (offset > fsi.EndOfFile.QuadPart)
> > +	if (offset >= fsi.EndOfFile.QuadPart)
> >  	  {
> >  	    set_errno (ENXIO);
> >  	    return -1;
> 
> Yeah, it does.  I'll push the patch.

Patch is in the latest cygwin-3.6.0-0.373.gfac7441835b0
test release.

We're probably releasing 3.6 in the next few weeks.


Thanks,
Corinna

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