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Date: Sun, 15 Apr 2012 08:23:12 -0400 (EDT)
From: Rick Macklem <rmacklem@uoguelph.ca>
To: dave jones <s.dave.jones@gmail.com>
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Cc: freebsd-fs@freebsd.org
Subject: Re: A question about msdosfs code
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Dave Jones wrote:
> Hello,
> 
> I have a question about the MSDOSFSROOT_OFS definition in denode.h:
> 
> /*
> * Internal pseudo-offset for (nonexistent) directory entry for the
> root
> * dir in the root dir
> */
> #define MSDOSFSROOT_OFS 0x1fffffff
> 
> I'm wondering why setting the root directory offset is 0x1fffffff?
> Is there any formula to calculate root dir offset instead? Thank you.
> 
The root dir of FAT file systems don't have entries for "." or ".." in
them. I haven't looked at the code, but I suspect this value is just used
to tell readdir code to fake them.

rick

> Regards,
> Dave.
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