Switching the Cygwin DLL to LGPLv3+, dropping commercial buyout option

Bump GPLv2+ to GPLv3+ for some files, clarify BSD 2-clause.

Everything else stays under GPLv3+.

New Linking Exception exempts resulting executables from LGPLv3 section 4.

Add CONTRIBUTORS file to keep track of licensing.

Remove 'Copyright Red Hat Inc' comments.

Signed-off-by: Corinna Vinschen <[email protected]>

winsup/CONTRIBUTORS

@@ -0,0 +1,92 @@
+This file contains a list of individuals who submit their patches to
+the Cygwin sources under 2-clause BSD license, as well as a list of
+individuals who signed the former Cygwin Copyright Assignment up to 2016.
+
+=========================================================================
+2-clause BSD:
+=========================================================================
+Copyright (c) <YEAR>, <OWNER>
+All rights reserved.
+
+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.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER 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.
+=========================================================================
+
+Individuals submitting their patches under 2-clause BSD:
+
+
+=========================================================================
+
+Individuals who signed the former Cygwin Copyright Assignment:
+
+AJ Reins				[email protected]
+Brian E. Dessent			[email protected]
+Brian Kenneth Ford			[email protected]
+Charles K. Moore			[email protected]
+Christian Franke			[email protected]
+Christian Lestrade			[email protected]
+Christopher Faylor			[email protected]
+Christopher January			[email protected]
+Conrad Scott				[email protected]
+Corinna Vinschen			[email protected]
+Craig Iain McGeachie			[email protected]
+David Korn				[email protected]
+Davis Euresti				[email protected]
+Dennis Vshivkov				[email protected]
+Elfyn McBratney				[email protected]
+Eric Blake				[email protected]
+Ernie Coskrey				[email protected]
+Gerd Spalink				[email protected]
+Hartmut Honisch				[email protected]
+Igor Pechtchanski			[email protected]
+Jacek Trzcinski				[email protected]
+Jeffrey Eric Altman			[email protected]
+Jerry D. Hedden				[email protected]
+Joe Loh					[email protected]
+Johan Rydberg				[email protected]
+Johannes Schindelin			[email protected]
+John Hood				[email protected]
+Jon Turney				[email protected]
+Yoni Londner				[email protected]
+Joseph H. Buehler			[email protected]
+Joshua Daniel Franklin			[email protected]
+Ken Brown				[email protected]
+Lapo Luchini				[email protected]
+Lev Bishop				[email protected]
+Max Kaehn				[email protected]
+Micha Nelissen				[email protected]
+Michael Haubenwallner			[email protected]
+Nicholas S. Wourms			[email protected]
+Pavel Yonkov Tsekov			[email protected]
+Peter Foley				[email protected]
+Pierre A. Humblet			[email protected]
+Robert G. Byrnes			[email protected]
+Ryan C. Gordon				[email protected]
+Sam Steingold				[email protected]
+Stephen Cleary				[email protected]
+Stephen Osborn				[email protected]
+Takashi Yano				[email protected]
+Thomas Pfaff				[email protected]
+Vaclav Haisman				[email protected]
+Yaakov Selkovitz			[email protected]
+Yitzchak Scott-Thoennes			[email protected]

winsup/COPYING.LIB

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
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+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
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+version:
+
+   a) under this License, provided that you make a good faith effort to
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+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
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+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
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+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
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+the following:
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+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
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+   document.
+
+   c) For a Combined Work that displays copyright notices during
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+   copies of the GNU GPL and this license document.
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+   d) Do one of the following:
+
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+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

winsup/CYGWIN_LICENSE

@@ -1,70 +1,28 @@
-Cygwin is free software.  Red Hat, Inc. licenses Cygwin to you under the
-terms of the GNU General Public License as published by the Free Software
-Foundation; you can redistribute it and/or modify it under the terms of
-the GNU General Public License either version 3 of the license, or (at your
-option) any later version (GPLv3+), along with the additional permissions
-given below.
+THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESSED OR
+IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+
+Unless stated otherwise, the sources under the cygwin subdirectory are
+licensed under the Lesser Gnu Public License, version 3 or (at your
+option) any later version (LGPLv3+).  See the COPYING.LIB file for the
+exact wording of that license.
+
+Unless stated otherwise, the sources under the cygserver, the lsaauth,
+and the utils subdirectories are licensed under the Gnu Public License,
+version 3 or (at your option) any later version (GPLv3+).  See the
+COPYING file for the exact wording of that license. 
+
+Parts of the sources in any subdirectory are licensed using a BSD-like
+license.  The affected source files contain explicit copyright notices
+to that effect.
+
+Linking Exception:
+
+  As a special exception, the copyright holders of the Cygwin library
+  grant you additional permission to link libcygwin.a, crt0.o, and
+  gcrt0.o with independent modules to produce an executable, and to
+  convey the resulting executable under terms of your choice, without
+  any need to comply with the conditions of LGPLv3 section 4. An
+  independent module is a module which is not itself based on the
+  Cygwin library.
 
-There is NO WARRANTY for this software, express or implied, including
-the implied warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-PURPOSE.  See the GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License along
-with this program.  If not, see <http://gnu.org/licenses/>.
-
-
-Additional Permissions:
-
-
-1. Linking Exception.
-
-As a special exception to GPLv3+, Red Hat grants you permission to link
-software whose sources are distributed under a license that satisfies
-the Open Source Definition with libcygwin.a, without libcygwin.a
-itself causing the resulting program to be covered by GPLv3+.
-
-This means that you can port an Open Source application to Cygwin, and
-distribute that executable as if it didn't include a copy of
-libcygwin.a linked into it.  Note that this does not apply to the
-Cygwin DLL itself.  If you distribute a (possibly modified) version of
-the Cygwin DLL, you must adhere to the terms of GPLv3+, including the
-requirement to provide sources for the Cygwin DLL, unless you have obtained
-a special Cygwin license to distribute the Cygwin DLL in only its binary
-form (see below).
-
-See http://www.opensource.org/docs/osd/ for the precise Open Source
-Definition referenced above.
-
-
-2.  Files Excluded from GPL Coverage.
-
-Red Hat grants you permission to distribute Cygwin with the following
-files, which are not considered part of Cygwin and are not governed by
-GPLv3+, in source or binary form.
-
-winsup\testsuite\winsup.api\msgtest.c
-winsup\testsuite\winsup.api\semtest.c
-winsup\testsuite\winsup.api\shmtest.c
-
-Red Hat grants you permission to link or combine code in Cygwin with
-code in or corresponding to the following files, which are not
-considered part of Cygwin and are not governed by GPLv3+, and to
-distribute such combinations under terms of your choice, provided that
-such terms are otherwise consistent with the application of GPLv3+ to
-Cygwin itself.  You must comply with GPLv3+ with respect to all
-portions of such combinations other than those that correspond to or
-are derived from such non-Cygwin code but which do not correspond to
-or are not derived from Cygwin itself.
-
-winsup\cygserver\sysv_shm.cc
-
-
-3.  Alternative License. 
-
-Red Hat sells a special Cygwin License for customers who are unable to
-provide their application in open source code form.  For more
-information, please see: http://www.redhat.com/software/cygwin/, or call
-+1-866-2REDHAT ext. 45300 (toll-free in the US).
-
-Outside the US call your regional Red Hat office, see
-http://www.redhat.com/about/contact/ww/

winsup/Makefile.common

@@ -1,7 +1,5 @@
 # Makefile.common - common definitions for the winsup directory
 #
-# Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2009, 2012 Red Hat, Inc.
-#
 # This file is part of Cygwin.
 #
 # This software is a copyrighted work licensed under the terms of the

winsup/Makefile.in

@@ -1,6 +1,4 @@
 # Makefile.in for windows stuff
-# Copyright 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006, 2007,
-# 2008, 2009, 2012, 2013 Red Hat, Inc.
 #
 # This file is part of Cygwin.
 #

winsup/configure.ac

@@ -1,6 +1,4 @@
 dnl Autoconf configure script for Cygwin.
-dnl Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006, 2009, 2010,
-dnl 2011, 2012, 2013, 2014 Red Hat, Inc.
 dnl
 dnl This file is part of Cygwin.
 dnl

winsup/cygserver/Makefile.in

@@ -1,5 +1,4 @@
 # Makefile for Cygwin server
-# Copyright 2003, 2006, 2007, 2008, 2009, 2014, 2015 Red Hat, Inc.
 
 # This file is part of Cygwin.
 

winsup/cygserver/bsd_helper.cc

@@ -1,7 +1,5 @@
 /* bsd_helper.cc
 
-   Copyright 2003, 2004, 2005, 2007, 2012, 2014 Red Hat Inc.
-
 This file is part of Cygwin.
 
 This software is a copyrighted work licensed under the terms of the