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Date: Tue, 23 Mar 2004 13:28:53 -0800 (PST)
From: Kaz Kylheku <kaz AT ashi DOT footprints DOT net>
To: Volker Quetschke <quetschke AT scytek DOT de>
cc: cygwin AT cygwin DOT com
Subject: Re: lstat on FAT - Was: Problem with find on FAT drives
In-Reply-To: <406093E5.3050907@scytek.de>
Message-ID: <Pine.LNX.4.44.0403231316380.32093-100000@ashi.FootPrints.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Tue, 23 Mar 2004, Volker Quetschke wrote:

> Date: Tue, 23 Mar 2004 14:45:41 -0500
> From: Volker Quetschke <quetschke AT scytek DOT de>
> To: cygwin AT cygwin DOT com
> Subject: [cygwin] lstat on FAT - Was: Problem with find on FAT drives
> 
> > Hi!
> > 
> > I just found a strange problem when using find on a FAT drive.
> > I got: "find: .\tmp changed during execution of find"
> 
> OK, I analyzed the problem a bit and found that lstat can
> give different inode numbers on fat, see the attached testcase.

Structurally, FAT does not have inodes or hard links.

Consequently, the inode numbers in a stat() implementation over FAT
don't have the semantics of inode identifiers.

So for instance "tmp" and "tmp/." are different objects, not merely
different directory entries pointing at the same inode as they would be
in a UNIX-like filesystem.

By the way, you can investigate inode numbers using the -i option
of ls instead of hacking up your own C program.

   $ mkdir tmp
   $ ls -din tmp tmp/.

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