Shell/Cshell questions

[Karl Kleinpaste]

bd at hpsemc.hp.com writes:
   Yow!  John Nelson called my bluff on /usr/lib/builtins:  he said
   he couldn't find it on any of the machines that he has access to.
   I remembered it from 4.2BSD (and HP-UX picked it up; probably some
   other vendors whose implementations are based on 4.2 have it as well).

You have your direction backwards: The set of changes to csh which
employ things like /usr/lib/builtins *originated* at HP via CMU.  The
base of such changes was the tenex.c module distributed around Usenet
in October 1983 by Ken Greer of HP Labs, which includes the comment:

/*
 * Tenex style file name recognition, .. and more.
 * History:
 *      Author: Ken Greer, Sept. 1975, CMU.
 *      Finally got around to adding to the Cshell., Ken Greer, Dec. 1981.
 *
 *      Search and recognition of command names (in addition to file names)
 *      by Mike Ellis, Fairchild A.I. Labs, Sept 1983.
 */

--Karl