From owner-freebsd-questions@FreeBSD.ORG  Mon Jul 25 00:32:49 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: 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 1A3B616A41F
	for <questions@freebsd.org>; Mon, 25 Jul 2005 00:32:49 +0000 (GMT)
	(envelope-from dgerow@afflictions.org)
Received: from pandora.afflictions.org (asylum.afflictions.org [64.7.134.90])
	by mx1.FreeBSD.org (Postfix) with ESMTP id A581443D45
	for <questions@freebsd.org>; Mon, 25 Jul 2005 00:32:48 +0000 (GMT)
	(envelope-from dgerow@afflictions.org)
Received: from localhost (localhost [127.0.0.1])
	by pandora.afflictions.org (Postfix) with ESMTP id B030D78C75
	for <questions@freebsd.org>; Sun, 24 Jul 2005 20:36:00 -0400 (EDT)
Received: from pandora.afflictions.org ([127.0.0.1])
	by localhost (pandora.afflictions.org [127.0.0.1]) (amavisd-new,
	port 10024) with ESMTP id 30430-06 for <questions@freebsd.org>;
	Sun, 24 Jul 2005 20:35:53 -0400 (EDT)
Received: from dementia.afflictions.org (dementia.afflictions.org
	[172.19.206.56])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by pandora.afflictions.org (Postfix) with ESMTP id CDE5778C72
	for <questions@freebsd.org>; Sun, 24 Jul 2005 20:35:52 -0400 (EDT)
Received: by dementia.afflictions.org (Postfix, from userid 1001)
	id B244E33C64; Sun, 24 Jul 2005 20:32:38 -0400 (EDT)
Date: Sun, 24 Jul 2005 20:32:38 -0400
From: Damian Gerow <dgerow@afflictions.org>
To: questions@freebsd.org
Message-ID: <20050725003238.GD2461@afflictions.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
X-GPG-Fingerprint: B3D7 D901 A53A 1A99 BFD6  E6DF 9F3B 742B C288 9CC9
User-Agent: Mutt/1.5.9i
X-Virus-Scanned: amavisd-new at pandora.afflictions.org
Cc: 
Subject: Shell scripts, SSH sessions, and for loops, oh my!
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: Mon, 25 Jul 2005 00:32:49 -0000

(I don't really know /where/ to ask this question.  It's not particularly
FreeBSD-centric, but the list has been good to me in the past, so hopefully
nobody minds.)

I'm trying to write a shell script that runs a for loop in an SSH session.
Simply, I'm trying to do this:

    for HOST in `cat hostnames` ; do
	ssh ${HOST} "for PROCESS in 01 02 ; do echo '${PROCESS}' ; done"
    done

But because this is run in a script, that gets translated to:

    for HOST in `cat hostnames` ; do
	ssh ${HOST} "for PROCESS in 01 02 ; do echo '' ; done"
    done

Which most definitely is not what I want.

I know a few ways around this -- expand the for loop, have a secondary
script, create a secondary script on-the-fly, etc. -- but I'm curious to see
if I can convince sh to *not* interpret ${PROCESS}.  I've tried escaping it,
I've tried a double-dollar, and I've tried escaping the double-dollar: none
have worked.

Does anyone have any ideas?

  - Damian

P.S. Please reply privately as well to the list; thanks.