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Message-ID: <42B6C3E0.6070107@byu.net>
Date: Mon, 20 Jun 2005 07:25:52 -0600
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: NTFS & cygwin inodes
References: <42AADAEF DOT 80301 AT lapo DOT it> <20050611150049 DOT GB11065 AT calimero DOT vinschen DOT de>
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According to Corinna Vinschen on 6/11/2005 9:00 AM:
> Good question.  It shouldn't, but I wouldn't give any gurantee.
> However, mkisofs doesn't know the type of the underlying FS, so
> it just plays safe.  The hash algorithm isn't 100% correct?  Well...
> I'm wondering how they mean it and why.  Any hint would be nice.

At one point in the distant past
(http://sourceware.org/ml/cygwin/2002-04/msg01648.html), the hash
algorithm was very weak on strings differing only in the suffix (a common
feature of pathnames) (if I recall correctly,
d:\cygwin\tmp\classpath\java\n{et,io} clashed on my win98 box), and I
submitted a patch to improve it.  I think a different hash is in use
today, but it is likewise strong enough for every file I've run across.

The other weirdness is that on FAT and other file systems that don't
support hard links, link() is faked by producing copies, which no longer
have unique inodes, so maybe that is part of the problem.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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