From owner-freebsd-questions@FreeBSD.ORG  Wed Aug 31 18:19:06 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@FreeBSD.ORG
Delivered-To: freebsd-questions@FreeBSD.ORG
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 35A1C16A420
	for <freebsd-questions@FreeBSD.ORG>;
	Wed, 31 Aug 2005 18:19:06 +0000 (GMT)
	(envelope-from freebsd@philip.pjkh.com)
Received: from zhonka1.zhonka.net (zhonka1.zhonka.net [66.228.195.5])
	by mx1.FreeBSD.org (Postfix) with ESMTP id B38FE43D4C
	for <freebsd-questions@FreeBSD.ORG>;
	Wed, 31 Aug 2005 18:19:03 +0000 (GMT)
	(envelope-from freebsd@philip.pjkh.com)
Received: from wolf.pjkh.com ([66.228.196.74]) by zhonka1.zhonka.net
	(Post.Office MTA v3.5.3 release 223 ID# 0-58414U4500L450S0V35)
	with ESMTP id net; Wed, 31 Aug 2005 11:19:02 -0700
Received: from localhost (localhost [127.0.0.1])
	by wolf.pjkh.com (Postfix) with ESMTP id 7AA09584D;
	Wed, 31 Aug 2005 11:18:57 -0700 (PDT)
Received: from wolf.pjkh.com ([127.0.0.1])
	by localhost (wolf.pjkh.com [127.0.0.1]) (amavisd-new,
	port 10024) with ESMTP
	id 01813-02; Wed, 31 Aug 2005 11:18:57 -0700 (PDT)
Received: by wolf.pjkh.com (Postfix, from userid 1000)
	id 4B67F584B; Wed, 31 Aug 2005 11:18:57 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1])
	by wolf.pjkh.com (Postfix) with ESMTP id 469495773;
	Wed, 31 Aug 2005 11:18:57 -0700 (PDT)
Date: Wed, 31 Aug 2005 11:18:57 -0700 (PDT)
From: Philip Hallstrom <freebsd@philip.pjkh.com>
To: Gary Kline <kline@tao.thought.org>
In-Reply-To: <20050831181545.GA57907@thought.org>
Message-ID: <20050831111755.V2009@wolf.pjkh.com>
References: <20050831181545.GA57907@thought.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-Virus-Scanned: by amavisd-new at pjkh.com
Cc: FreeBSD Mailing List <freebsd-questions@FreeBSD.ORG>
Subject: Re: Doing a modulo in /bin/sh??
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 31 Aug 2005 18:19:06 -0000

> 	I can grab the results of "w=$date+%U)"; in C an use the modulo
> 	operator; is there a way to do this is /bin/sh?  ot zsh?
>
> 	tia, guys,
>
> 	gary
>
> #/bin/sh
> w=$(date +%U)
> echo "w is $w";
> (even=$(w % 2 ));       ## flubs.
> echo "even is $even";       ## flubs.
>
> if [ $even -eq 0 ]       ## flubs, obv'ly.
> then
>        echo "week is even";
> else
>        echo "week is odd";
> fi

Take a look at 'expr'....

philip@foxtrot:~ 
% expr 1 % 2
1
philip@foxtrot:~ 
% expr 2 % 2
0