From owner-freebsd-hackers Thu May 25 11:19:11 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from po4.glue.umd.edu (po4.glue.umd.edu [128.8.10.124]) by hub.freebsd.org (Postfix) with ESMTP id 508FA37B65A for ; Thu, 25 May 2000 11:19:05 -0700 (PDT) (envelope-from howardjp@glue.umd.edu) Received: from z.glue.umd.edu (root@z.glue.umd.edu [128.8.10.71]) by po4.glue.umd.edu (8.9.3/8.9.3) with ESMTP id OAA13537; Thu, 25 May 2000 14:18:48 -0400 (EDT) Received: from z.glue.umd.edu (sendmail@localhost [127.0.0.1]) by z.glue.umd.edu (8.9.3/8.9.3) with SMTP id OAA27515; Thu, 25 May 2000 14:18:46 -0400 (EDT) Received: from localhost (howardjp@localhost) by z.glue.umd.edu (8.9.3/8.9.3) with ESMTP id OAA27509; Thu, 25 May 2000 14:18:45 -0400 (EDT) X-Authentication-Warning: z.glue.umd.edu: howardjp owned process doing -bs Date: Thu, 25 May 2000 14:18:45 -0400 (EDT) From: James Howard To: "Duane H. Hesser" Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: FreeBSD kernel as a replacement for Linux kernel In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, 25 May 2000, Duane H. Hesser wrote: > Anyone remember the old Pyramid OSX 'universe' command? > > In the mid-80s, when the "System V" versus "BSD" dichotomy was in > full bloom, Pyramid delivered a system with two "universes" available. > A user could specify 'universe bsd' and work in a pure BSD environment; > 'universe att' placed you in a pure S5 environment (of the time). > A user in the BSD environment could "cross the line" by issuing a > command like "att ls", or even "att cc ....". The universe was > marked by a flag which affected the interpretation of "conditional > symbolic links". A separate syscall was available to create > conditional symbolic links. > > Sequent also implemented conditional symbolic links, although I > seem to recall that the Pyramid implementation was a bit more > complete. > > How about a 'FreeBSD' universe and a 'Linux' universe? It would be cool if it were extensible and you could strap on a Solaris/SVR4/SVR5, HURD, or even Mac and Windows universes later. Since I mention it, does anyone know the major differences between SCO's new SVR5 (Unixware 7) and traditional SVR4 implementations? Going to SCO's website all I get is market-speak. Jamie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message