From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org)
	by nuthatch.gentoo.org with esmtp (Exim 4.50)
	id 1Ed1XN-0006YY-M7
	for garchives@archives.gentoo.org; Fri, 18 Nov 2005 08:24:02 +0000
Received: from robin.gentoo.org (localhost [127.0.0.1])
	by robin.gentoo.org (8.13.5/8.13.5) with SMTP id jAI8Ma3L013440;
	Fri, 18 Nov 2005 08:22:36 GMT
Received: from smtpauth01.mail.atl.earthlink.net (smtpauth01.mail.atl.earthlink.net [209.86.89.61])
	by robin.gentoo.org (8.13.5/8.13.5) with ESMTP id jAI8EJh2017368
	for <gentoo-user@lists.gentoo.org>; Fri, 18 Nov 2005 08:14:19 GMT
Received: from [64.166.166.172] (helo=sarge.electronerdia.net)
	by smtpauth01.mail.atl.earthlink.net with asmtp (Exim 4.34)
	id 1Ed1Ny-0006LQ-Vg
	for gentoo-user@lists.gentoo.org; Fri, 18 Nov 2005 03:14:19 -0500
Received: from sheila.electronerdia.net (sheila.electronerdia.net [192.168.1.32])
	by sarge.electronerdia.net (Postfix) with ESMTP id 96691FF8C0
	for <gentoo-user@lists.gentoo.org>; Fri, 18 Nov 2005 00:16:38 -0800 (PST)
From: John Myers <electronerd@electronerdia.net>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] how to find if a program is using a particular /dev device?
Date: Fri, 18 Nov 2005 00:19:30 -0800
User-Agent: KMail/1.8.3
References: <Pine.LNX.4.64.0511172350080.14423@mail.magrittesystems.com>
In-Reply-To: <Pine.LNX.4.64.0511172350080.14423@mail.magrittesystems.com>
Precedence: bulk
List-Post: <mailto:gentoo-user@lists.gentoo.org>
List-Help: <mailto:gentoo-user+help@gentoo.org>
List-Unsubscribe: <mailto:gentoo-user+unsubscribe@gentoo.org>
List-Subscribe: <mailto:gentoo-user+subscribe@gentoo.org>
List-Id: Gentoo Linux mail <gentoo-user.gentoo.org>
X-BeenThere: gentoo-user@gentoo.org
Reply-to: gentoo-user@lists.gentoo.org
MIME-Version: 1.0
Content-Type: multipart/signed;
  boundary="nextPart18572441.OunOtpARGO";
  protocol="application/pgp-signature";
  micalg=pgp-sha1
Content-Transfer-Encoding: 7bit
Message-Id: <200511180019.36886.electronerd@electronerdia.net>
X-ELNK-Trace: 8839a2c17b2169aa1aa676d7e74259b7b3291a7d08dfec79245641081e65cdb046ede651b7a20ba3350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c
X-Originating-IP: 64.166.166.172
X-Archives-Salt: aac8fb45-722d-4c5e-8c4d-ea598d870ef7
X-Archives-Hash: 16ab78ae784cafbffde26372b513fe84

--nextPart18572441.OunOtpARGO
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

On Thursday 17 November 2005 23:54, michael@michaelshiloh.com wrote:
> I have a custom device driver in /dev/ that can only be used by one
> program at a time. Since the device is /dev/ttyUSB0, I can see if anyone
> is using it by:
>
>  	ls -l /proc/*/fd/* | grep ttyUSB0
>
> Is there a utility or other better way I can discover which process, or
> better, which program, is using a particular device?
>
> Thanks,
> Michael
try lsof

--nextPart18572441.OunOtpARGO
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2-ecc0.1.6 (GNU/Linux)

iD8DBQBDfY6Y61oU2vmzgqgRAlANAKCBLqCt1U4dZ/CdSB40c2rh5yLpEgCggXcA
L64I6jqwRlpYPBYdUsKtLBs=
=mC1Y
-----END PGP SIGNATURE-----

--nextPart18572441.OunOtpARGO--
-- 
gentoo-user@gentoo.org mailing list