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Date: Sun, 3 Feb 2008 22:30:23 -0800
From: Jeremy Chadwick <koitsu@FreeBSD.org>
To: Ganbold <ganbold@micom.mng.net>
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Cc: FreeBSD Stable Mailing List <freebsd-stable@freebsd.org>
Subject: Re: /dev/cuad0: Device busy
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On Mon, Feb 04, 2008 at 12:53:58PM +0800, Ganbold wrote:
> Hi,
>
> I'm trying to use serial port but the system says device busy.
>
> daemon# cu -l /dev/cuad0 -s 9600
> /dev/cuad0: Device busy
> link down

Does the same happen if you do `cu -l ttyd0 -s 9600`?

> How to check whether something is using serial port?
> Any idea?

fstat should help here.

-- 
| Jeremy Chadwick                                    jdc at parodius.com |
| Parodius Networking                           http://www.parodius.com/ |
| UNIX Systems Administrator                      Mountain View, CA, USA |
| Making life hard for others since 1977.                  PGP: 4BD6C0CB |