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From: dave@inset.UUCP (Dave Lukes)
Newsgroups: net.unix-wizards
Subject: Re: VERY SERIOUS rmdir bug
Message-ID: <1074@inset.UUCP>
Date: Tue, 22-Jul-86 08:28:58 EDT
Article-I.D.: inset.1074
Posted: Tue Jul 22 08:28:58 1986
Date-Received: Thu, 24-Jul-86 00:30:43 EDT
References: <79@wanginst.UUCP> <707@basser.oz>
Reply-To: dave@inset.UUCP (Dave Lukes)
Distribution: net
Organization: The Instruction Set Ltd., London, UK.
Lines: 38

In article <707@basser.oz> john@basser.oz (John Mackin) writes:
>	...
>  I believe that the bug will be likely to be found
>on any machine that doesn't do rmdir by system call, although I haven't
>checked sysV sources, not having any handy.
>
>To demonstrate the bug, do this:
>
>$ mkdir foo foo/bar
>$ rmdir foo/bar/../bar
>(rmdir will cough along the lines of "foo/bar/../bar not removed")

I just tried this on our V.2 VAX and it does exactly the same thing (yawn) ....

This seems to be another variant on the:

	$ mkdir foo
	$ cd foo
	$ rmdir `pwd`

scenario which caused confusion on V7. 

>We have fixed rmdir, but I would like to wait a couple of days to
>see if I can think of any more problems (or any bugs in the fix,
>which wasn't simple) before posting a diff.

Good: give that fix a really HAAAAAARRRRRRRRD time.

What worries me is how many other hidden nasties are waiting in that nasty
little (~~100 lines) piece of code.
Well, at least we don't have symbolic links to confuse things even more.

	XXXXXX
-- 

		Dave Lukes. (...!inset!dave)

``Fox hunting: the unspeakable chasing the inedible'' -- Oscar Wilde