From owner-freebsd-questions@FreeBSD.ORG  Wed Jul  1 18:04:55 2009
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 108D51065670
	for <freebsd-questions@freebsd.org>;
	Wed,  1 Jul 2009 18:04:55 +0000 (UTC)
	(envelope-from nullpt@gmail.com)
Received: from mail-fx0-f218.google.com (mail-fx0-f218.google.com
	[209.85.220.218])
	by mx1.freebsd.org (Postfix) with ESMTP id 9B82E8FC1B
	for <freebsd-questions@freebsd.org>;
	Wed,  1 Jul 2009 18:04:54 +0000 (UTC)
	(envelope-from nullpt@gmail.com)
Received: by fxm18 with SMTP id 18so916880fxm.43
	for <freebsd-questions@freebsd.org>;
	Wed, 01 Jul 2009 11:04:53 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:mime-version:received:date:message-id:subject
	:from:to:content-type;
	bh=O+dXkkkdZa1DxHSFl857+JgqIP9fbQyB1hS0gOwvE8E=;
	b=x7HswYFG4cUei7XkieKwcqv+N5KnZ3XfxV3Dt7AfM/IfVbPckwaBvmYg+JRH0Vo6i4
	ZQ7NV3L5TmSVe1Ws6ui6Q7hSSr5BwLsz7UYHbQpMN4oYeX5YnPY6t9GGHvWbvKW9K5w1
	IUrgWTkuq4RedoPg6XqpyDPlIkw9JapDumUh8=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=mime-version:date:message-id:subject:from:to:content-type;
	b=q1Qljy0o/W8488qgW69LgHe/P+jzmWg7V95pcap4Jvb/RRQCmBg8YUv6mUi+AcjKe/
	lBz0xGgkdnCkpgY1qdS//qtvtSkPmlsbVw37U31QyiX9NK+e/uy+2yE8yUs3Z6FY68cw
	KS/cqfsBFyNV2vzwc2+JSLYQdOqS5gd++Ifvg=
MIME-Version: 1.0
Received: by 10.223.107.199 with SMTP id c7mr6448957fap.31.1246470000738; Wed, 
	01 Jul 2009 10:40:00 -0700 (PDT)
Date: Wed, 1 Jul 2009 18:40:00 +0100
Message-ID: <755cb9fc0907011040o28b82cdbjd5760b139f797050@mail.gmail.com>
From: Alexandre Vieira <nullpt@gmail.com>
To: freebsd-questions@freebsd.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
X-Content-Filtered-By: Mailman/MimeDel 2.1.5
Subject: scripting tip needed
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, 01 Jul 2009 18:04:55 -0000

Hi folks,

I'm having a little problem.

For exambe in ksh:

$ z=0
$ y=1
$ x=aaaa
$ eval `echo MACHINE_DISK$z[$y]`=$x
$ echo ${MACHINE_DISK0[1]}
aaaa

My problem is getting back the value of the variable using variables to
refer to the variable name (confusing). I.e $MACHINE_DISK$z[$y] .

Using ${} works great when you only have a simple array but adding a
variable in the middle of the variable name seems to ruin it.

$ echo ${MACHINE_DISK0[$y]}
aaaa
$ echo ${MACHINE_DISK$z[$y]}
ksh: ${MACHINE_DISK$z[$y]}: bad substitution

Thanks in advance for any tip
Cheers