From mboxrd@z Thu Jan  1 00:00:00 1970
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
In-reply-to: Your message of "Thu, 16 Aug 2012 09:40:22 EDT."
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Date: Thu, 16 Aug 2012 08:59:01 -0700
From: Bakul Shah <bakul@bitblocks.com>
Message-Id: <20120816155901.6FB72B827@mail.bitblocks.com>
Subject: Re: [9fans] Multi-dimensional filesystem
Topicbox-Message-UUID: aa23e044-ead7-11e9-9d60-3106f5b1d025

On Thu, 16 Aug 2012 09:40:22 EDT erik quanstrom <quanstro@quanstro.net>  wrote:
> > What is more bizarre, with my scheme, is how to implement the meaning
> > of ".."? If classical clients have to be able to be used, the server
> > must create a fake name (as the penultimate component of the
> > dirpath), that triggers the correct answer from the server.
>
> see defmnt.c:/^fixdotdotname for where this is handled by the kernel,
> not the file server.

It pretty much has to.  Consider what happens when you do
something like

% x=`{pwd}
% bind /sys/src tmp
% cd tmp
% cd ..

This gets you back to $x.  If you leave ".." upto the
fileserver, you'd get back to /sys not $x. The server can't
know the right context.