Mailing-List: contact cygwin-help@sourceware.cygnus.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@sources.redhat.com Delivered-To: mailing list cygwin@sources.redhat.com Message-ID: <3AFAF02C.545770B1@veritas.com> Date: Thu, 10 May 2001 12:46:52 -0700 From: Bob McGowan Organization: VERITAS Software X-Mailer: Mozilla 4.73 [en] (WinNT; U) X-Accept-Language: en MIME-Version: 1.0 To: JROZYCKI@ebmail.gdeb.com CC: cygwin@cygwin.com Subject: Re: Question about the 'read' command in bash References: <85256A48.006A6FF5.00@ebmail.gdeb.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit ksh is not bash (nor is it pdksh). ksh manages to do several things in the current shell, while bash and pdksh handle it in a sub-process. Variables in a sub-process cannot affect the environment of the parent. The solution is to use substitution: op_sys=$(uname | cut -c1-4) and use the value. I'd suggest that this is the more portable and probably the preferred way of doing this. JROZYCKI@ebmail.gdeb.com wrote: > > I have a bash shell script with the following lines of code: > > #!/bin/bash > uname | cut -c1-4 | read op_sys > echo $op_sys > > This works fine at work using SGI IRIX and ksh, but under cygwin and bash > at home, op_sys does not get set - null is echoed.. what do I need to do > differently? > > thanks, > Jeff > > -- > Want to unsubscribe from this list? > Check out: http://cygwin.com/ml/#unsubscribe-simple -- Bob McGowan Staff Development Engineer VERITAS Software rmcgowan@veritas.com -- Want to unsubscribe from this list? Check out: http://cygwin.com/ml/#unsubscribe-simple