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COPYING
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COPYING
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Copyright (c) 2002-2015 Balabit
Copyright (c) 1996-2015 Balázs Scheidler
syslog-ng is licensed under the combination of the GPL and LGPL licenses.
Our intention with the choice of our licenses is to:
1) license reusable/extendable code under the LGPL,
2) license code implementing a specific function, not intended to be extended, under the GPL
Although the location of a file wthin the source tree is closely related to
how it is licensed (lib/ is LGPL by default, for instance), there are
exceptions. One example is: some of the tests are GPLed while they are
related to LGPLed library code.
With that in mind, before assuming the licensing of a specific file based
solely on its location, please check its licensing in its copyright header, i.e.
the very first comment block of the source code file.
Alternatively, you can also use the contents of the `tests/copyright/policy`
file, this is an input to our automated test suite that checks licenses
against our intents.
The syslog-ng core contained in the following subdirectories
is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version
(please refer to the file LGPL.txt for more details):
lib/
libtest/
syslog-ng/
syslog-ng-ctl/
persist-tool/
tests/loggen/
docker/
The syslog-ng modules (modules/ and scl/ subdirectories, except the ones that
declare LGPL-2.1-or-later in their license notices) is free software; you can
redistribute it and/or modify it under the terms of the GNU General Public
License version 2 as published by the Free Software Foundation,
or (at your option) any later version
(please refer to the file GPL.txt for more details).
FAQ:
====
The questions and answers below try to summarize the intentions behind this
licensing scheme.
Q: Is it possible to create derived works of syslog-ng under the GPL/LGPL
licenses?
A: Yes, that's exactly the point of open source. Works derived from the
plugins will have to use the GPL license, but you can choose to use LGPL for
them as well.
Q: Do I need to sign a Contributory License Agreement in order for my
contribution to be accepted?
A: No, starting with syslog-ng 3.2, you don't need to sign a CLA in order to
have your contributions accepted.
Q: Is it possible to create non-free plugins for syslog-ng?
A: Yes. It is our understanding that plugins are derived works of the
syslog-ng core but not derived works of other plugins. Thus, non-free
plugins are possible, provided they do not link to any of the GPLd plugins
explicitly and the only connection between two plugins is via the syslog-ng
core.
Q: Who is permitted to create non-free plugins for syslog-ng? Is it just
BalaBit (the current copyright holder as of the initial 3.2 release)?
A: No, everyone including BalaBit.
PORTIONS WERE CONTRIBUTED UNDER THE FOLLOWING LICENSES:
======================================================
lib/compat:
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/