Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA Path: utzoo!watmath!clyde!bonnie!akgua!sdcsvax!dcdwest!ittvax!decvax!genrad!panda!talcott!harvard!seismo!brl-tgr!tgr!gwyn@Brl-Vld.ARPA From: Doug Gwyn (VLD/VMB)Newsgroups: net.unix-wizards Subject: Re: yacc: public domain? Message-ID: <8167@brl-tgr.ARPA> Date: Sat, 9-Feb-85 18:35:32 EST Article-I.D.: brl-tgr.8167 Posted: Sat Feb 9 18:35:32 1985 Date-Received: Mon, 11-Feb-85 04:56:11 EST Sender: news@brl-tgr.ARPA Organization: Ballistic Research Lab Lines: 11 You have hit upon the biggest problem with UNIX sites re-implementing pieces of UNIX "in the public domain". Namely, the person doing so is constrained not to disclose any of AT&T's trade secrets. If your code ends up operating just the same as AT'T's and if you had access to UNIX sources, it would be pretty hard to prove that you did not use your privileged access to determine critical approaches embodied in your own code. If you really plan to do something like recode the YACC parser from scratch, be sure you work entirely from unlicensed sources of information (e.g. the UNIX manuals and journal articles).