Re: TOSFS

[daniel@fiction.ms.sub.org (Daniel Roedding)]

Hi!

Ulrich Kuehn wrote:

> I have the impression, that the number of the starting cluster of a file
> or directory must be stored somewhere by GEMDOS. Maybe there is a hack
> possible to get this value out of the DTA? Can somebody at Atari confirm
> this? There might be some problems when running Metados, but it would
> be nice to have real meaningful inodes on a TOSFS....

As far as I know, the 21 reserved bytes in the DTA aren't documented
officially anywhere.

Anyway, here's what I know about it:

Byte		Contents

0-11		search mask from Fsfirst() in the directory, i. e. w/o path
12		search attribute from Fsfirst()
13-16		offset in the search directory (byte position, thus always
		k*32) -- really silly to put a long to an odd address...
17-20		pointer to some kind of directory descriptor in GEMDOS'
		internal data

So, bytes 13-16 are unique in one directory, bytes 17-20 point to something
containing information which directory it is, bytes 17-20 are almost
certainly NOT usable to trace back which directory is accessed, if you
don't examine the structure they point to.

Daniel

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