Copyright (c) 1980, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
The Regents of the University of California
Copyright (c) 1989, 1990, 1991, 1992, 1993 UNIX System Laboratories, Inc.
Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Keith Bostic
Copyright (c) 1992 Keith Muller
Copyright (c) 1992, 1993, 1994 Henry Spencer
Copyright (c) 1994, 1996 Rob Mayoff
Copyright (c) 1997 Phillip F. Knaack
Copyright (c) 1997, 1998, 2002, 2004, 2015 Todd C. Miller <millert@openbsd.org>
Copyright (c) 1999, 2000, 2004, 2009, 2011 Sven Verdoolaege <skimo@kotnet.org>
Copyright (c) 2000, 2006, 2013, 2020 The NetBSD Foundation, Inc.
Copyright (c) 2002 Niels Provos <provos@citi.umich.edu>
Copyright (c) 2004 Ted Unangst
Copyright (c) 2008 Otto Moerbeek <otto@drijf.net>
Copyright (c) 2012, 2013 Christian Neukirchen <chneukirchen@gmail.com>
Copyright (c) 2013 Antoine Jacoutot <ajacoutot@openbsd.org>
Copyright (c) 2014 Al Viro <viro@ZenIV.linux.org.uk>
Copyright (c) 2015 Philip Guenther <guenther@openbsd.org>
Copyright (c) 2015 The DragonFly Project
Copyright (c) 2018 Duncan Overbruck
Copyright (c) 2022 Ørjan Malde <red@foxi.me>
Copyright (c) 2021, 2022, 2023, 2024 Jeffrey H. Johnson <trnsz@pobox.com>
All rights reserved.
This software was originally derived from code contributed to the University
of California, Berkeley by Steve Kirkendall, the author of the "Elvis" editor.
This program contains code derived from software contributed to Berkeley by:
* Margo Seltzer * Mike Olson * Henry Spencer, University of Totonto
* Brian Hirt * Paul Vixie * David Hitz, Auspex Systems, Inc.
* Dave Borman, Cray Research, Inc. * Keith Muller, UCSD
This program contains code derived from software contributed to The NetBSD
Foundation, Inc. by Dieter Baron, Thomas Klausner, and Jeremy C. Reed.
This program contains code derived from material licensed to the University
of California, Berkeley by American Telephone and Telegraph Co. or UNIX System
Laboratories, Inc. and reproduced herein with the permission of UNIX System
Laboratories, Inc.
This program contains code developed for OpenBSD which was sponsored in part
by the Defense Advanced Research Projects Agency (DARPA) and Air Force Research
Laboratory, Air Force Materiel Command, United States Air Force (USAF), under
agreement number F39502-99-1-0512.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
3. Neither the name of the University nor the names of its contributors may
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
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The Institute of Electrical and Electronics Engineers and the American National
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Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1-1988, IEEE Standard Portable Operating System Interface for Computer
Environments (POSIX), Copyright (c) 1988-1992 by The Institute of Electrical
and Electronics Engineers, Inc. In the event of any discrepancy between these
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