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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!think!harvard!cmcl2!seismo!brl-tgr!gwyn
From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.bugs.usg
Subject: SVR2 rm -r bug
Message-ID: <861@brl-tgr.ARPA>
Date: Wed, 18-Dec-85 18:59:26 EST
Article-I.D.: brl-tgr.861
Posted: Wed Dec 18 18:59:26 1985
Date-Received: Fri, 20-Dec-85 05:06:57 EST
Distribution: net
Organization: Ballistic Research Lab
Lines: 22

I think the SVR2 "rm" utility has a serious bug;
since my version has been heavily modified, I'm
not entirely sure about the unmodified version.
To see if you have the bug, try the following:

	$ mkdir foo foo/bar
	$ touch xxx foo/xxx foo/bar/xxx
	$ rm -r foo/bar xxx
	$ ls -R xxx foo

You should see that "xxx", "foo/bar/xxx", and
"foo/bar" no longer exist and "foo" and "foo/xxx"
still exist.  Any other result indicates that
your "rm" has the bug.

There is also a separate bug in the code that
checks for attempts to "rm ..".

The fixes for these were too extensive to try to
post; if you have received the BRL UNIX System
V emulation for 4.2BSD before this posting, send
me a note and I'll mail you the corrected source.