Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT sourceware DOT cygnus DOT com>
List-Archive: <http://sourceware.cygnus.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sourceware DOT cygnus DOT com>
List-Help: <mailto:cygwin-help AT sourceware DOT cygnus DOT com>, <http://sourceware.cygnus.com/ml/#faqs>
Sender: cygwin-owner AT sourceware DOT cygnus DOT com
Delivered-To: mailing list cygwin AT sourceware DOT cygnus DOT com
Date: Wed, 19 Jan 2000 11:01:55 -0500
From: Chris Faylor <cygwin AT sourceware DOT cygnus DOT com>
To: Jason Moxham <jlm AT maths DOT soton DOT ac DOT uk>
Cc: cygwin AT sourceware DOT cygnus DOT com
Subject: Re: bug in execl
Message-ID: <20000119110155.B4922@cygnus.com>
Reply-To: cygwin AT sourceware DOT cygnus DOT com
Mail-Followup-To: Jason Moxham <jlm AT maths DOT soton DOT ac DOT uk>,
	cygwin AT sourceware DOT cygnus DOT com
References: <200001191222 DOT MAA06611 AT malus DOT soton DOT ac DOT uk>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Mailer: Mutt 1.0i
In-Reply-To: <200001191222.MAA06611@malus.soton.ac.uk>; from jlm@maths.soton.ac.uk on Wed, Jan 19, 2000 at 12:22:13PM +0000

On Wed, Jan 19, 2000 at 12:22:13PM +0000, Jason Moxham wrote:
> 
> 
> Bug in execl()
> ---------------
> 
> Under B20.1+gcc-2.95.2 running on NT/98 under a "dos" window (not bash)
> 
> prog1.exe consists of
> 
> {signal(SIGHUP,SIG_IGN);
> //some stuff
> execl("prog2.exe","prog2.exe",argv[1],argv[2],argv[3],0);
> return 0;}
> 
> prog2.exe consists of
> 
> {signal(SIGHUP,SIG_IGN);
> // stuff
> return 0;}
> 
> I pretty sure the details of the program don't matter
> 
> No problem running it , however using task manager on NT we see that 
> when prog2.exe is running , prog1.exe is still there when it should be
> overwriten .
> 
> So a series of execl calls could easily fill up all memory , when the
> only memory required is for the program currently executing

Sorry.  That's the best we can do when emulating exec on Windows.

If you run this under bash or sh you should note that this behavior does
not occur.

cgf

--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe AT sourceware DOT cygnus DOT com