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From: dan@rose3.Rosemount.COM (Dan Messinger)
Newsgroups: comp.unix.questions
Subject: Re: Environment variables
Message-ID: <286@rose3.Rosemount.COM>
Date: Wed, 26-Aug-87 14:17:28 EDT
Article-I.D.: rose3.286
Posted: Wed Aug 26 14:17:28 1987
Date-Received: Sat, 29-Aug-87 06:19:29 EDT
References: <626@unmvax.unm.edu>
Reply-To: dan@rose3.UUCP (Dan Messinger)
Organization: Rosemount Inc., Burnsville, MN
Lines: 17

In article <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?
>(I.e., in a script)  

The following (as described in my manual) works fine.  However, it does
not differentiate between environment variables and shell variables.

#
if ( $?xxx ) then
	echo its set
else
	echo not set
endif

Dan Messinger
dan@rose3.rosemount.com