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X-eSCM-MailFrom:	<andre AT dieball DOT net>
Subject:	RE: Variable not set correctly in bash
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Date:	Wed, 13 Apr 2005 09:22:31 +0200
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From:	"Andre Dieball" <andre AT dieball DOT net>
To:	<cygwin AT cygwin DOT com>
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X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id j3D7Zlmp003199

Hello Brian

Thanks for the hint. In fact, I'm calling explicit bash with
"#!/bin/bash" in the scripts.
I'll try you're workaround anyway as soon as I come home.

Thanks.

Andre

-----Original Message-----
From: cygwin-owner AT cygwin DOT com [mailto:cygwin-owner AT cygwin DOT com] On Behalf
Of Brian Dessent
Sent: Mittwoch, 13. April 2005 08:03
To: cygwin AT cygwin DOT com
Subject: Re: Variable not set correctly in bash

Andre Dieball wrote:

>                 NEW=$[ $OLD + 1 ]

That construct is a bash extension that is not part of the regular
bourne shell capability.  On linux, /bin/sh is bash, so it works.  On
Cygwin, /bin/sh is ash which is a more basic bourne shell that does not
have all the extra extensions that bash has.  In other words, by doing
that you're limiting your script to only work on bash.  You can either
change the shebang to explicitly call bash, or use a more portable
construct, such as

NEW=`expr $OLD + 1`

Brian

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