Path: utzoo!utgpu!water!watmath!clyde!rutgers!cmcl2!beta!unm-la!armstron
From: armstron@unm-la.UUCP (AIDE Brant Armstrong)
Newsgroups: comp.unix.questions
Subject: Re: Fun with ignoreeof
Summary: Did I leave out a method?
Message-ID: <687@unm-la.UUCP>
Date: 26 Jan 88 03:11:54 GMT
References: <2248@tekcrl.TEK.COM>
Reply-To: armstron@unm-la.UUCP (AIDE Brant Armstrong)
Organization: Univ. of New Mexico at Los Alamos
Lines: 40

In article <2248@tekcrl.TEK.COM> eirik@crl.TEK.COM (Eirik Fuller) writes:
>  [stuff deleted]
>I have the following two lines in .cshrc:
>
>alias exit 'echo "Use ^D to exit"'
>alias logout 'echo "Use ^D to logout"'
>
>They are there only as a joke, but they got me thinking.  Suppose I
>also say "set ignoreeof".  How do I logout?  No fair using unset or
>unalias or alias -- they give any number of obvious two-liners.  Can
>I do it with a one-liner? (Using ";" is cheating too :-).

This should cover most of it:

	1a) Say: "login <somebody who doesn't exist>"
	1b) Say: "login <return>"
	2) Create an executable file that does one of:
		A) kill $$
		B) kill 0
		C) login <non-existent user, optional>
		D) kill with a -9 option of A or B
		E) Have the file contain two lines/a semicolon that
		   does "logout;logout" or some such; this
		   should not be a c/sh file as this will give a
		   message "Not login shell." or the like. Remember,
		   the file name is only one line long; the author
		   didn't specify that this could/couldn't be done.
		F) Similar to E with "stty -nohang; stty 0" in the file. 
		   I think this will kill the control process even if 
		   you're not on a dialup terminal, aka this is untested.

	3) A, B, or D from the terminal
	4) (Assuming no jobs in background) Turn off the terminal
	5) [ THIS SPACE FOR RENT ]

There is no warranty, expressed or implied, given here. Flames to /dev/null.

Brant Armstrong
unm-la.lanl.gov
...!lanl!unm-la!armstron