From mboxrd@z Thu Jan  1 00:00:00 1970
Date: Wed,  8 Mar 1995 19:09:34 -0500
From: Scott Schwartz schwartz@galapagos.cse.psu.edu
Subject: no need for cd
Topicbox-Message-UUID: 07c36fa4-eac8-11e9-9e20-41e7f4b1d025
Message-ID: <19950309000934.DfaKaSierzw4YLNe9eG8CnzFSigMin4fVNNq1Emwt6A@z>

serge writes:
| (Didn't the Plan9 people say that mount entries are hashed,
| so that ".." can refer to arbitrary directories, depending on what
| you've mounted?  E.g. this won't change any semantics.)

Yes, they did.  I find the idea of ".." in a union mount directory
confusing.  It certainly breaks e.g. tar.  A nice file tree walk
library could at least encapsulate strategies for avoiding lossage,
but if your filesystem is not a tree, is having ubiquitous ".."
entries the right thing?  Maybe "set default prefix" is a better
abstraction.  [My plan 9 manpages are stored in an old VMS binder;
there must be leakage.:-)]