diff(1)

[Dag-Erling Smørgrav]

Brian Fundakowski Feldman <green at freebsd.org> writes:
> Do you happen to know anything about the OpenBSD grep?

a little:

des at dwp ~/projects/openbsd/src/usr.bin/grep% head -5 grep.c
/*      $OpenBSD: grep.c,v 1.29 2004/08/05 21:47:33 deraadt Exp $       */

/*-
 * Copyright (c) 1999 James Howard and Dag-Erling Coïdan Smørgrav
 * All rights reserved.

I don't know how much they've changed it, but I do know that it still
uses whichever regexp engine you happen to have in libc.  In our case,
that means good old Henry Spencer.  Last I talked to him, he was going
to release a new, improved, and much faster regexp engine, but that
was years ago and I still haven't seen anything come out of it.

DES
-- 
Dag-Erling Smørgrav - des at des.no