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From: ira@slovax.UUCP
Newsgroups: comp.os.minix
Subject: SUID bit patent and Minix - question
Message-ID: <283@slovax.UUCP>
Date: Mon, 16-Feb-87 11:35:43 EST
Article-I.D.: slovax.283
Posted: Mon Feb 16 11:35:43 1987
Date-Received: Wed, 18-Feb-87 03:36:54 EST
Organization: R & D Associates., Tacoma, WA
Lines: 11

(I just received my copy of the Minix book and have only started reading
it, so if the answer may be found there, I appologize up front.)

The Set User ID bit in the directory is protected by United States
patent number 4,135,240.  Minix appears to have the same capability.
Did Tanenbaum or Prentice-Hall license the patent from AT&T?  If not, under
what conditions can the Set User ID bit concept be employed without an
AT&T license?

While on the subject, does anyone know if the Set Group ID bit (which is
not explicitly mentioned in the patent) is also covered by said patent?