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<title>2. Incorporated code</title>
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<h2 id="CHID2" class="">Chapter 2 - Incorporated code</h2>
<p>
A number of pieces of external code are included in the Exim distribution.
</p>
<ul>
<li>
<p>
Regular expressions are supported in the main Exim program and in the
Exim monitor using the freely-distributable PCRE library, copyright
© University of Cambridge. The source to PCRE is no longer shipped with
Exim, so you will need to use the version of PCRE shipped with your system,
or obtain and install the full version of the library from
<span class="docbook_emphasis"><a href="ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre">ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre</a></span>.
</p>
</li>
<li>
<p>
Support for the cdb (Constant DataBase) lookup method is provided by code
contributed by Nigel Metheringham of (at the time he contributed it) Planet
Online Ltd. The implementation is completely contained within the code of Exim.
It does not link against an external cdb library. The code contains the
following statements:
</p>
<p>
Copyright © 1998 Nigel Metheringham, Planet Online Ltd
</p>
<p>
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
This code implements Dan Bernstein’s Constant DataBase (cdb) spec. Information,
the spec and sample code for cdb can be obtained from
<span class="docbook_emphasis"><a href="http://www.pobox.com/~djb/cdb.html">http://www.pobox.com/~djb/cdb.html</a></span>. This implementation borrows
some code from Dan Bernstein’s implementation (which has no license
restrictions applied to it).
</p>
</li>
<li>
<p>
Client support for Microsoft’s <span class="docbook_emphasis">Secure Password Authentication</span> is provided
by code contributed by Marc Prud’hommeaux. Server support was contributed by
Tom Kistner. This includes code taken from the Samba project, which is released
under the Gnu GPL.
</p>
</li>
<li>
<p>
Support for calling the Cyrus <span class="docbook_emphasis">pwcheck</span> and <span class="docbook_emphasis">saslauthd</span> daemons is provided
by code taken from the Cyrus-SASL library and adapted by Alexander S.
Sabourenkov. The permission notice appears below, in accordance with the
conditions expressed therein.
</p>
<p>
Copyright © 2001 Carnegie Mellon University. All rights reserved.
</p>
<p>
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
</p>
<ol>
<li>
<p>
Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
</p>
</li>
<li>
<p>
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.
</p>
</li>
<li>
<p>
The name “Carnegie Mellon University” must not be used to
endorse or promote products derived from this software without
prior written permission. For permission or any other legal
details, please contact
</p>
<div class="docbook_literallayout"><pre>
Office of Technology Transfer
Carnegie Mellon University
5000 Forbes Avenue
Pittsburgh, PA 15213-3890
(412) 268-4387, fax: (412) 268-7395
tech-transfer@andrew.cmu.edu
</pre></div>
</li>
<li>
<p>
Redistributions of any form whatsoever must retain the following
acknowledgment:
</p>
<p>
“This product includes software developed by Computing Services
at Carnegie Mellon University (<span class="docbook_emphasis"><a href="http://www.cmu.edu/computing/">http://www.cmu.edu/computing/</a></span>.”
</p>
<p>
CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
</p>
</li>
</ol>
</li>
<li>
<p>
The Exim Monitor program, which is an X-Window application, includes
modified versions of the Athena StripChart and TextPop widgets.
This code is copyright by DEC and MIT, and their permission notice appears
below, in accordance with the conditions expressed therein.
</p>
<p>
Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts,
and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
</p>
<p>
All Rights Reserved
</p>
<p>
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Digital or MIT not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
</p>
<p>
DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
</p>
</li>
<li>
<p>
Many people have contributed code fragments, some large, some small, that were
not covered by any specific licence requirements. It is assumed that the
contributors are happy to see their code incorporated into Exim under the GPL.
</p>
</li>
</ul>
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