From owner-freebsd-current@FreeBSD.ORG Mon Aug 17 05:47:55 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4C85D106568B for ; Mon, 17 Aug 2009 05:47:55 +0000 (UTC) (envelope-from dougb@FreeBSD.org) Received: from mail2.fluidhosting.com (mx21.fluidhosting.com [204.14.89.4]) by mx1.freebsd.org (Postfix) with ESMTP id E9E218FC43 for ; Mon, 17 Aug 2009 05:47:54 +0000 (UTC) Received: (qmail 3151 invoked by uid 399); 17 Aug 2009 05:47:52 -0000 Received: from localhost (HELO foreign.dougb.net) (dougb@dougbarton.us@127.0.0.1) by localhost with ESMTPAM; 17 Aug 2009 05:47:52 -0000 X-Originating-IP: 127.0.0.1 X-Sender: dougb@dougbarton.us Message-ID: <4A88EF03.3000507@FreeBSD.org> Date: Sun, 16 Aug 2009 22:47:47 -0700 From: Doug Barton Organization: http://www.FreeBSD.org/ User-Agent: Thunderbird 2.0.0.22 (X11/20090729) MIME-Version: 1.0 To: Szilveszter Adam References: <90E06EA7-4D27-411C-962F-BBCB6D6A13C6@mac.com> <4A88C31C.70204@haruhiism.net> <20090817025829.GH74242@bunrab.catwhisker.org> <4A88D06F.2000408@FreeBSD.org> <20090817044658.GA1504@baranyfelhocske.buza.adamsfamily.xx> In-Reply-To: <20090817044658.GA1504@baranyfelhocske.buza.adamsfamily.xx> X-Enigmail-Version: 0.95.7 OpenPGP: id=D5B2F0FB Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org Subject: Re: rc(8) regression. What's the story? X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Aug 2009 05:47:55 -0000 Szilveszter Adam wrote: > On Sun, Aug 16, 2009 at 08:37:19PM -0700, Doug Barton wrote: >> David Wolfskill wrote: >> >>> * Create a new rc.d script that sleeps until an IP address is assigned. >>> >>> I think the latter would be most flexible, as the appropriate keywords >>> could be specified for precisely those rc.d/* scripts that actually need >>> an IP address in order to function, though implementing it might >>> engender rather more churn in /etc/rc.d/* than folks might prefer. >> This is definitely the preferred solution, and has been discussed in >> the past on the rc.d list. > > Well, this would probably cover the story of DHCP + slow media change > detection (or just plain slow DHCP). However, there are similar (and way > worse) problems if you are using a machine with a wlan interface, even > without DHCP. In this case, an IP address is immediately assigned as > soon as the wlanX interface is created, but that does not mean that > traffic can flow. In my case, getting an association with an iwi(4) card > lasts about 15-25 seconds. True, NTPD does not exit because an IP > address is configured, but the spamming that it (and stuff like > sendmail) produce on the console bears witness to the fact that they are > not prepared to handle this situation... I will not even start to imagine > what happens if I add a DHCP server into this mix... > >> One way to implement this would be to specify a default address to >> ping, and make it overridable, similar to how I did the named_wait >> feature. Bonus points if the user has ntpd enabled and we can pick one >> of the server lines from ntp.conf at random. > > This, however, would be a much better solution, because it would also > cover slow wireless. Yes, I agree that merely detecting the presence of an IP address is not enough. David actually had a good idea regarding having the default ping address be the gateway, which I think is a much better default. That should be enough for most people, those who need something more specific can specify it as an option. Anyone want to take this project on? Doug -- This .signature sanitized for your protection