Date: Mon, 22 Jul 1996 23:58:29 -0700 From: David Greenman <dg@root.com> To: ywliu <team_fbf@pristine.com.tw> Cc: freebsd-chat@freebsd.org Subject: Re: BSD4.4, Lite, Lite-2 Message-ID: <199607230658.XAA01811@root.com> In-Reply-To: Your message of "Tue, 23 Jul 1996 13:44:27 -0000." <199607231344.NAA08543@neptune.pristine.com.tw>
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>As I browsing the book "The Design and Implementaton of the 4.4BSD Operating >System", I noticed there is a chart explaining the Unix history. Unlike >other OS books, it covers BSD4.4 (of course) and I noticed there are >4.4BSD, 4.4BSD Lite-1, 4.4BSD Lite-2. > >What's the difference among them ? I seem to have the impression that >Lite-1 is 4.4BSD without some VM codes. Am I correct ? What about Lite-2 ? 4.4BSD is the encumbered version that contains some USL code - execve(), certain parts of the tty code, a few other things (none having to do with VM, however). 4.4BSD-lite is 4.4BSD without the encumbered stuff. 4.4BSD-lite2 is an update to 4.4BSD-lite. FreeBSD is based on 4.4BSD-lite with the missing stuff written from scratch plus many major improvements and additions (this is probably an understatement :-)). -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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