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Date:	Wed, 7 Feb 2007 12:29:43 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: ar 'unable to rename... Invalid cross-device link'
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On Feb  7 11:55, Corinna Vinschen wrote:
> On Feb  6 16:38, Matthew Woehlke wrote:
> > ...anyone have any guesses why rename() can't rename files in the same 
> > directory, if the directory is an NFS mount? This causes 'ar' to fail 
> > with the error:
> > 
> > ar: unable to rename 'libcloudobj.a' reason: Invalid cross-device link
> > 
> > I see this in strace with both 'ar' and 'mv':
> > 
> >    46  371094 [main] ar 2588 rename: -1 = rename 
> > (h:\<...path...>\src\objects\stWBl4pj, 
> > h:\<...path...>\src\objects\libcloudobj.a)
> > 
> > This seems to happen when the file already exists, but rename() only 
> > fails on NFS mounts (not local drives). Is this a problem with 'ar', or 
> > Cygwin's rename()?
> 
> Since you're one of the few running NFS, you should also debug the
> situation further.  Apparently the Cygwin rename function fails, but
> from your one-liner strace snippet there's no hint at all what happens.
> The error should have been mentioned a couple of lines before.  You
> should also mention if you use a release version of Cygwin or a
> developer snapshot.  You know http://cygwin.com/problems.html, don't
> you?

I just installed SFU NFS for testing and, here it comes:

  "I can not reproduce rename failing on an NFS share."

Maybe it's something with your permissions.
http://cygwin.com/acronyms/#SHTDI2(*)


Corinna


(*) I know, this is an invalid URL.  What I mean is "Somebody has to
    debug it", but that's not covered by SHTDI.

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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