[Golden Eagle]

Lions' book was first published in the 1980's under non-disclosure and was used as a textbook by universities that had licensed the Unix source. ATT vended a copy of this book to Unix licensees for some time, and a photocopy version was widely circulated among Unix licensees. The original SCO, before its purchase by Caldera, allowed the book to be published without any non-disclosure terms in 1996.

So what's the copyright on this book? Does it allow free distribution of the code under a different product (Linux vs Unix?)

[justlurking]

So what's the copyright on this book? Does it allow free distribution of the code under a different product (Linux vs Unix?)

It doesn't matter. The code in question was released twice under the BSD license by AT&T and subsequently Caldera (a previous incarnation of today's SCO).

Of course, that was in the part of my posting that you snipped out.