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Message-ID: <435E2E2B.9090306@byu.net>
Date: Tue, 25 Oct 2005 07:07:55 -0600
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: another manifestation of the .. bug
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The fact that cygwin incorrectly flattens /name/../ to / in pathname
resolution without first resolving name is triggering a failure in a new
test recently added to the coreutils testsuite.

mkdir -p dir/.. && test -d dir

should always succeed when dir did not exist beforehand, but because
cygwin is flattening stat("dir/..") into stat(".") rather than failing
with the required ENOENT when dir does not yet exist, mkdir does not go on
to create dir.  I can work around this issue in coreutils by making mkdir
- -p never use its initial stat() to short-circuit directory creation, but
this will penalize normal usage because it will force calling mkdir for
every name in the chain even when the ultimate directory already exists.
I would much rather see a fix in cygwin so that coreutils would work out
of the box in this case.

Yes, I know, http://cygwin.com/acronyms/#SHTDI.  And yes, I realize that
such a change, if it is to ever happen, would be post-1.5.19, because of
its potential impact.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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