How to prevent VI from getting a shell?

[Ronald S H Khoo]

In article <570 at DIALix.UUCP> bernie at DIALix.oz.au (Bernd Felsche) writes:

> set SHELL in the environment to something which doest nothing, say
> /bin/true.  vi forks-execs whatever SHELL is defined to be, or the
> shell if undefined.

I don't know about *your* version of vi, but mine lets you defeat this
by doing :set shell=/bin/sh

I got around the problem by binary patching out the call to fork() in
vi.  Ugh.  Also, I never found a way to defeat letting the user read and
write files other than the current file.  Any offers ?

-- 
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