From owner-freebsd-questions@FreeBSD.ORG  Sun Feb 15 05:03:38 2004
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id E5BBD16A4CE
	for <freebsd-questions@freebsd.org>;
	Sun, 15 Feb 2004 05:03:38 -0800 (PST)
Received: from sccrmhc13.comcast.net (sccrmhc13.comcast.net [204.127.202.64])
	by mx1.FreeBSD.org (Postfix) with ESMTP id AF28843D1F
	for <freebsd-questions@freebsd.org>;
	Sun, 15 Feb 2004 05:03:38 -0800 (PST)
	(envelope-from freebsd-questions-local@be-well.ilk.org)
Received: from be-well.no-ip.com ([66.30.196.44])
          by comcast.net (sccrmhc13) with ESMTP
          id <2004021513033801600ohbhje>; Sun, 15 Feb 2004 13:03:38 +0000
Received: by be-well.no-ip.com (Postfix, from userid 1147)
	id B984011; Sun, 15 Feb 2004 08:03:37 -0500 (EST)
Sender: lowell@be-well.ilk.org
To: <Barbish3@adelphia.net>
References: <MIEPLLIBMLEEABPDBIEGMEABFLAA.Barbish3@adelphia.net>
From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Date: 15 Feb 2004 08:03:37 -0500
In-Reply-To: <MIEPLLIBMLEEABPDBIEGMEABFLAA.Barbish3@adelphia.net>
Message-ID: <441xowv6ja.fsf@be-well.ilk.org>
Lines: 41
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
cc: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
cc: "freebsd-questions@FreeBSD. ORG" <freebsd-questions@FreeBSD.ORG>
Subject: Re: Using dhclient to update zoneedit with my dynamic IP address
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: "freebsd-questions@FreeBSD. ORG" <freebsd-questions@FreeBSD.ORG>
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 15 Feb 2004 13:03:39 -0000

"JJB" <Barbish3@adelphia.net> writes:

> Thanks for this sample, but it exceeds my script coding ability.
> I added some comments to your sample but I may be lost.
> 
> #!/bin/sh
> 
> updater_prog = /usr/local/bin/noip2        # program to run
> if [ x$reason = xREBOOT ]   || 	\      #  is this an reboot or
>    [ x$old_ip_address = x ] || 	\      #  old ip field empty or
>    [ x$old_ip_address != x$new_ip_address ]; then   #  old not EQ new  then
>     if [ -x $updater_prog ]; then                # don't know what this does

That tests whether the program exists and is executable.

> 	${updater_prog} -i "$new_ip_address"    # exec program
>     fi
> fi
> 
> For my purposes I think this is what I need.
> This way zoneedit is only updated when ip changes.
> Do I have script correct?
> 
> /etc/dhclient-exit-hooks.sh    with this content
> #!/bin/sh
> # This script only gets called when dhclient runs
> # (IE: boot and lease expire)
> # Old and new ip  address fields are populated by dhclient,
> # which keeps the old used IP address in some config file
> # so it's not lost on reboot and can be read in at boot time to
> # determine if the ip has changed. So with cable or dsl modem
> # that stays powered on while PC is powered off still is
> # using old IP address.
> 
> updater_prog = /usr/local/bin/wget....rest of command   # my wget pgm
> 
> if [ x$old_ip_address != x$new_ip_address ];   # old not EQ new
> 	then ${updater_prog}                     # exec my pgm
> fi

Looks like that should work...