From owner-freebsd-hackers@FreeBSD.ORG  Fri Jul 20 06:32:37 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id A16C116A419
	for <hackers@freebsd.org>; Fri, 20 Jul 2007 06:32:37 +0000 (UTC)
	(envelope-from news@Watt.COM)
Received: from wattres.watt.com (wattres.watt.com [66.93.133.130])
	by mx1.freebsd.org (Postfix) with ESMTP id 8073F13C468
	for <hackers@freebsd.org>; Fri, 20 Jul 2007 06:32:37 +0000 (UTC)
	(envelope-from news@Watt.COM)
Received: from wattres.watt.com (localhost.watt.com [127.0.0.1])
	by wattres.watt.com (8.13.8/8.13.8) with ESMTP id l6K6MBOV004760
	for <hackers@freebsd.org>; Thu, 19 Jul 2007 23:22:16 -0700 (PDT)
	(envelope-from news@wattres.watt.com)
Received: (from news@localhost)
	by wattres.watt.com (8.13.8/8.13.8/Submit) id l6K6MBB9004759
	for hackers@freebsd.org; Thu, 19 Jul 2007 23:22:11 -0700 (PDT)
	(envelope-from news)
To: hackers@freebsd.org
Path: not-for-mail
From: Steve Watt <steve.removethis@Watt.COM>
Newsgroups: local.freebsd-hackers
Date: Fri, 20 Jul 2007 06:22:11 +0000 (UTC)
Organization: Watt Consultants, San Jose, CA, USA
Lines: 19
Message-ID: <f7pkaj$44l$1@wattres.Watt.COM>
References: <78c6bd860707191725r14b8bfe3sf15c1f0e30cf82ca@mail.gmail.com>
NNTP-Posting-Host: localhost.watt.com
X-Trace: wattres.Watt.COM 1184912531 4245 127.0.0.1 (20 Jul 2007 06:22:11 GMT)
X-Complaints-To: usenet@wattres.Watt.COM
NNTP-Posting-Date: Fri, 20 Jul 2007 06:22:11 +0000 (UTC)
X-Newsreader: trn 4.0-test76 (Apr 2, 2001)
Originator: steve@Watt.COM (Steve Watt)
X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0
	(wattres.watt.com [127.0.0.1]);
	Thu, 19 Jul 2007 23:22:16 -0700 (PDT)
X-Archived: 1184912536.695686415@wattres.Watt.COM
X-Mailman-Approved-At: Fri, 20 Jul 2007 11:23:25 +0000
Cc: 
Subject: Re: Path to executable of current process?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
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, 20 Jul 2007 06:32:37 -0000

In <78c6bd860707191725r14b8bfe3sf15c1f0e30cf82ca@mail.gmail.com>,
Michael B Allen <ioplex@gmail.com> wrote:

>Actually what I'm *really* trying to do is port some code that invokes
>GDB to do a backtrace and I need to give GDB the path to the
>executable of the current process (e.g. on linux this is
>/proc/<pid>/exe) and the pid of the process to trace (easy - getpid).
>The first argument is trickey since FreeBSD frequently does not have a
>/proc filesystem. So it seems kvm_getargv should have this path no?

# mount_procfs proc /proc

# /bin/ls -l /proc/<pid>/file

Note that if the executable on disk gets replaced, this won't work.
-- 
Steve Watt KD6GGD  PP-ASEL-IA          ICBM: 121W 56' 57.5" / 37N 20' 15.3"
 Internet: steve @ Watt.COM                      Whois: SW32-ARIN
   Free time?  There's no such thing.  It just comes in varying prices...