Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!uunet!husc6!cmcl2!rutgers!rochester!bbn!diamond.bbn.com!mlandau
From: mlandau@bbn.com (Matt Landau)
Newsgroups: comp.unix.questions
Subject: Re: Environment variables
Message-ID: <8172@slate.BBN.COM>
Date: Wed, 26-Aug-87 11:14:31 EDT
Article-I.D.: slate.8172
Posted: Wed Aug 26 11:14:31 1987
Date-Received: Fri, 28-Aug-87 04:36:55 EDT
References: <626@unmvax.unm.edu> <2876@phri.UUCP>
Reply-To: mlandau@bbn.com (Matt Landau)
Organization: BBN Laboratories Incorporated, Cambridge, MA
Lines: 16
Summary: $?VARIABLE

In <626@unmvax.unm.edu> mike@turing.UNM.EDU.UUCP (Michael I. Bushnell) writes:
> How can I determine if an environment variable is set using csh?

Well, under 4BSD and Sun csh, this works:

	if ($?VAR) then
		echo "VAR is set"
	else
		echo "VAR is not set"
	endif

I would assume it works the same way in SysV, but I don't have one handy
to check.
-- 
 Matt Landau			A rock feels no pain...
 mlandau@bbn.com			...and an island never cries