Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Date: Wed, 9 Oct 2002 01:42:02 -0400
From: Jon LaBadie <jcyg AT jgcomp DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: grep = *  vs grep = * > foo
Message-ID: <20021009054202.GA859@butch.jgcomp.com>
References: <20021009002305 DOT 79648 DOT qmail AT web40514 DOT mail DOT yahoo DOT com> <20021009002731 DOT GA25291 AT redhat DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20021009002731.GA25291@redhat.com>
User-Agent: Mutt/1.3.28i

On Tue, Oct 08, 2002 at 08:27:31PM -0400, Christopher Faylor wrote:
> On Tue, Oct 08, 2002 at 05:23:05PM -0700, Sheryl McKeown wrote:
> >grepping and redircting the output to a file
> >causes a process loop that has to be killed
> >
> >17:17 0  [C:\Development\test]
> >.grep = * > delme
> >
> >17:18 66048  [C:\Development\test]
> >.^C
> >
> >What happens is that the grep starts reading the delme
> >file and then reporting all those finds...
> 
> Right.  The file is created before grep is started so when grep expands
> the '*' if finds delme and dutifully searches it...  forever.
> 
> >Ok, but the odd part this is, this behavior doesn't appear when using
> >the bash shell (on the same XP box).
> 
> When run from the bash shell, bash itself first expands '*' and then
> creates delme.  Since delme doesn't exist, it isn't searched.

Would a similar endless loop occur if delme did exist
and the redirection overwrote it?

-- 
Jon H. LaBadie                  jcyg AT jgcomp DOT com
 JG Computing
 4455 Province Line Road        (609) 252-0159
 Princeton, NJ  08540-4322      (609) 683-7220 (fax)

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/