From owner-freebsd-hackers@FreeBSD.ORG  Fri Dec 17 17:00:16 2004
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 21F1416A4CE
	for <freebsd-hackers@freebsd.org>;
	Fri, 17 Dec 2004 17:00:16 +0000 (GMT)
Received: from manor.msen.com (manor.msen.com [148.59.4.66])
	by mx1.FreeBSD.org (Postfix) with ESMTP id C672943D2F
	for <freebsd-hackers@freebsd.org>;
	Fri, 17 Dec 2004 17:00:15 +0000 (GMT)
	(envelope-from wayne@manor.msen.com)
Received: from manor.msen.com (localhost [127.0.0.1])
	by manor.msen.com (8.12.9p2/8.12.9) with ESMTP id iBHH0CO7096064
	for <freebsd-hackers@freebsd.org>;
	Fri, 17 Dec 2004 12:00:14 -0500 (EST)
	(envelope-from wayne@manor.msen.com)
Received: (from wayne@localhost)
	by manor.msen.com (8.12.9p2/8.12.9/Submit) id iBHH0CU8096063
	for freebsd-hackers@freebsd.org; Fri, 17 Dec 2004 12:00:12 -0500 (EST)
	(envelope-from wayne)
Date: Fri, 17 Dec 2004 12:00:12 -0500
From: "Michael R. Wayne" <wayne@staff.msen.com>
To: freebsd-hackers@freebsd.org
Message-ID: <20041217170012.GI803@manor.msen.com>
Mail-Followup-To: freebsd-hackers@freebsd.org
References: <1103310712.53001.22.camel@red.nativenerds.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1103310712.53001.22.camel@red.nativenerds.com>
User-Agent: Mutt/1.4.2.1i
Subject: Re: query cdrw tray
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Dec 2004 17:00:16 -0000

On Fri, Dec 17, 2004 at 12:11:52PM -0700, Ed Stover wrote:
> 
> How to I ask the CD burner if it's tray is open or closed? I am creating
> a automagical shell script to do semi-unattended backups and need to
> figure out how to make sure there is a cd in the tray before I start
> burning. Any help would be greatly appreciated.

Having solved this once before, here's the code I used:

   #!/bin/sh 

   # Spin wait for a CD into the drive
   while /usr/X11R6/bin/cda status | /usr/bin/grep -q '^No_Disc' 
   do
	   sleep 1;
   done