Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Message-ID: <425CB62C.FAF6F5B6@dessent.net> Date: Tue, 12 Apr 2005 23:03:24 -0700 From: Brian Dessent Organization: My own little world... MIME-Version: 1.0 To: cygwin@cygwin.com Subject: Re: Variable not set correctly in bash References: <86B406A17C3F684CB66499B87361FB3802D8FD@mail.dieball.net> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Reply-To: cygwin@cygwin.com 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 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/