From owner-freebsd-hackers@FreeBSD.ORG Wed Jun 30 01:09:35 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7B81A16A4CE for ; Wed, 30 Jun 2004 01:09:35 +0000 (GMT) Received: from rwcrmhc11.comcast.net (rwcrmhc11.comcast.net [204.127.198.35]) by mx1.FreeBSD.org (Postfix) with ESMTP id 35E4743D5D for ; Wed, 30 Jun 2004 01:09:35 +0000 (GMT) (envelope-from julian@elischer.org) Received: from interjet.elischer.org ([24.7.73.28]) by comcast.net (rwcrmhc11) with ESMTP id <200406300109340130054575e>; Wed, 30 Jun 2004 01:09:34 +0000 Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id SAA64663; Tue, 29 Jun 2004 18:09:33 -0700 (PDT) Date: Tue, 29 Jun 2004 18:09:31 -0700 (PDT) From: Julian Elischer To: Alasdair Lumsden In-Reply-To: <1088557263.3528.102.camel@host-83-146-2-180.bulldogdsl.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-hackers@freebsd.org Subject: Re: FreeBSD and MacOS X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Jun 2004 01:09:35 -0000 On Wed, 30 Jun 2004, Alasdair Lumsden wrote: > On Tue, 2004-06-29 at 21:20, Lev Walkin wrote: > > MacOS X is based on multiple concepts, including > > Darwin. Darwin is based on FreeBSD. > > > "Darwin is based on FreeBSD" - technically, no :) > > Darwin is a continuation of NeXT Step which is based on the Mach kernel. > > While Mach is derived from 4.3BSD (circa 1986~1988), there's been about > 15 years worth of divergence since then. For example, FreeBSD is > monolithic while Mach is more micro-kernel based. Also the driver models > are quite different, eg Darwin uses IOKit (Object Oriented driver > interface model). > > So, its correct to say Darwin is based on NeXT Step, Mach, and 4.3BSD, > but not to say it's based on FreeBSD. > > > It would be interesting to see what percentage of Darwin is based on > 4.3BSD, Mach/NeXTStep, FreeBSD, and Apple code (ie post-NeXT > acquisition). > There are bits of FreeBSD in the kernel.. the majority of the importing has been in the userland however where the UNIX userland is mostly based on FreeBSD (or so I'm told) > Even more interestingly, just how much code has migrated from Darwin to > FreeBSD? Apple seems to do a lot of taking from the Open Source > community, how much have we taken much back? > > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >