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From: brachman@ubc-cs.UUCP
Newsgroups: comp.os.minix
Subject: Re: expr(1) source
Message-ID: <989@ubc-cs.UUCP>
Date: Fri, 10-Apr-87 23:09:18 EST
Article-I.D.: ubc-cs.989
Posted: Fri Apr 10 23:09:18 1987
Date-Received: Sun, 12-Apr-87 03:14:44 EST
References: <1133@botter.cs.vu.nl>
Reply-To: brachman@ubc-cs.UUCP (Barry Brachman)
Distribution: world
Organization: UBC Department of Computer Science, Vancouver, B.C., Canada
Lines: 22
Keywords: expr bugs


The version of expr.c posted by erikb@cs.vu.nl (Erik Baalbergen) has a bug.
Try:
	expr '(' 1 ')' + 1

You'll get "syntax error".

I'm about to post a version of expr(1) to net.sources that is almost
compatible with the 4.[23] BSD version.
The posting will include Henry Spencer's regular expression routines which
are very useful even if you don't want my version of expr.

By the way, the 4.[23] BSD expr has a bug.  Try:
	expr 5 - 6 - 1
See my recent posting to comp.bugs.4bsd for the fix.

-----
Barry Brachman		 | {ihnp4!alberta,uw-beaver,seismo}!
Dept. of Computer Science|	ubc-vision!ubc-cs!brachman
Univ. of British Columbia| brachman@cs.ubc.cdn
Vancouver, B.C. V6T 1W5  | brachman%ubc.csnet@csnet-relay.arpa
(604) 228-4327		 | brachman@ubc.csnet