In article <34E06EEE.AFE0F53A@linux.de> you write:
>[...]
>Can anyone give me a hint whether someone has done this or where to find
>more information on Toronto implementations?
Dunno. But you could look at the unionfs implementation for 4.4BSD.
Unionfs is a rather similar thing: Mount a writeable directory over
a read only directory. You can change files (they are automagically
copied over to the upper layer), delete files (if the upper layer
supports whiteout directory entries), and create new files, of course.
The filesystem implementation is described in
"Design and Implementation of the 4.4BSD Operating System"
by McKusick et al.
And there's the 4.4BSD kernel source code, of course :-)
Regards, Felix.
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