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a687059c 1 GNU GENERAL PUBLIC LICENSE
2 Version 1, February 1989
3
4 Copyright (C) 1989 Free Software Foundation, Inc.
8d814b80 5 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA
a687059c 6 Everyone is permitted to copy and distribute verbatim copies
7 of this license document, but changing it is not allowed.
8
9 Preamble
10
11 The license agreements of most software companies try to keep users
12at the mercy of those companies. By contrast, our General Public
13License is intended to guarantee your freedom to share and change free
14software--to make sure the software is free for all its users. The
15General Public License applies to the Free Software Foundation's
16software and to any other program whose authors commit to using it.
17You can use it for your programs, too.
18
19 When we speak of free software, we are referring to freedom, not
20price. Specifically, the General Public License is designed to make
21sure that you have the freedom to give away or sell copies of free
22software, that you receive source code or can get it if you want it,
23that you can change the software or use pieces of it in new free
24programs; and that you know you can do these things.
25
26 To protect your rights, we need to make restrictions that forbid
27anyone to deny you these rights or to ask you to surrender the rights.
28These restrictions translate to certain responsibilities for you if you
29distribute copies of the software, or if you modify it.
30
31 For example, if you distribute copies of a such a program, whether
32gratis or for a fee, you must give the recipients all the rights that
33you have. You must make sure that they, too, receive or can get the
34source code. And you must tell them their rights.
35
36 We protect your rights with two steps: (1) copyright the software, and
37(2) offer you this license which gives you legal permission to copy,
38distribute and/or modify the software.
39
40 Also, for each author's protection and ours, we want to make certain
41that everyone understands that there is no warranty for this free
42software. If the software is modified by someone else and passed on, we
43want its recipients to know that what they have is not the original, so
44that any problems introduced by others will not reflect on the original
45authors' reputations.
46
47 The precise terms and conditions for copying, distribution and
48modification follow.
49\f
50 GNU GENERAL PUBLIC LICENSE
51 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
52
53 0. This License Agreement applies to any program or other work which
54contains a notice placed by the copyright holder saying it may be
55distributed under the terms of this General Public License. The
56"Program", below, refers to any such program or work, and a "work based
57on the Program" means either the Program or any work containing the
58Program or a portion of it, either verbatim or with modifications. Each
59licensee is addressed as "you".
60
61 1. You may copy and distribute verbatim copies of the Program's source
62code as you receive it, in any medium, provided that you conspicuously and
63appropriately publish on each copy an appropriate copyright notice and
64disclaimer of warranty; keep intact all the notices that refer to this
65General Public License and to the absence of any warranty; and give any
66other recipients of the Program a copy of this General Public License
67along with the Program. You may charge a fee for the physical act of
68transferring a copy.
69
70 2. You may modify your copy or copies of the Program or any portion of
71it, and copy and distribute such modifications under the terms of Paragraph
721 above, provided that you also do the following:
73
74 a) cause the modified files to carry prominent notices stating that
75 you changed the files and the date of any change; and
76
77 b) cause the whole of any work that you distribute or publish, that
78 in whole or in part contains the Program or any part thereof, either
79 with or without modifications, to be licensed at no charge to all
80 third parties under the terms of this General Public License (except
81 that you may choose to grant warranty protection to some or all
82 third parties, at your option).
83
84 c) If the modified program normally reads commands interactively when
85 run, you must cause it, when started running for such interactive use
86 in the simplest and most usual way, to print or display an
87 announcement including an appropriate copyright notice and a notice
88 that there is no warranty (or else, saying that you provide a
89 warranty) and that users may redistribute the program under these
90 conditions, and telling the user how to view a copy of this General
91 Public License.
92
93 d) You may charge a fee for the physical act of transferring a
94 copy, and you may at your option offer warranty protection in
95 exchange for a fee.
96
97Mere aggregation of another independent work with the Program (or its
98derivative) on a volume of a storage or distribution medium does not bring
99the other work under the scope of these terms.
100\f
101 3. You may copy and distribute the Program (or a portion or derivative of
102it, under Paragraph 2) in object code or executable form under the terms of
103Paragraphs 1 and 2 above provided that you also do one of the following:
104
105 a) accompany it with the complete corresponding machine-readable
106 source code, which must be distributed under the terms of
107 Paragraphs 1 and 2 above; or,
108
109 b) accompany it with a written offer, valid for at least three
110 years, to give any third party free (except for a nominal charge
111 for the cost of distribution) a complete machine-readable copy of the
112 corresponding source code, to be distributed under the terms of
113 Paragraphs 1 and 2 above; or,
114
115 c) accompany it with the information you received as to where the
116 corresponding source code may be obtained. (This alternative is
117 allowed only for noncommercial distribution and only if you
118 received the program in object code or executable form alone.)
119
120Source code for a work means the preferred form of the work for making
121modifications to it. For an executable file, complete source code means
122all the source code for all modules it contains; but, as a special
123exception, it need not include source code for modules which are standard
124libraries that accompany the operating system on which the executable
125file runs, or for standard header files or definitions files that
126accompany that operating system.
127
128 4. You may not copy, modify, sublicense, distribute or transfer the
129Program except as expressly provided under this General Public License.
130Any attempt otherwise to copy, modify, sublicense, distribute or transfer
131the Program is void, and will automatically terminate your rights to use
132the Program under this License. However, parties who have received
133copies, or rights to use copies, from you under this General Public
134License will not have their licenses terminated so long as such parties
135remain in full compliance.
136
137 5. By copying, distributing or modifying the Program (or any work based
138on the Program) you indicate your acceptance of this license to do so,
139and all its terms and conditions.
140
141 6. Each time you redistribute the Program (or any work based on the
142Program), the recipient automatically receives a license from the original
143licensor to copy, distribute or modify the Program subject to these
144terms and conditions. You may not impose any further restrictions on the
145recipients' exercise of the rights granted herein.
146\f
147 7. The Free Software Foundation may publish revised and/or new versions
148of the General Public License from time to time. Such new versions will
149be similar in spirit to the present version, but may differ in detail to
150address new problems or concerns.
151
152Each version is given a distinguishing version number. If the Program
153specifies a version number of the license which applies to it and "any
154later version", you have the option of following the terms and conditions
155either of that version or of any later version published by the Free
156Software Foundation. If the Program does not specify a version number of
157the license, you may choose any version ever published by the Free Software
158Foundation.
159
160 8. If you wish to incorporate parts of the Program into other free
161programs whose distribution conditions are different, write to the author
162to ask for permission. For software which is copyrighted by the Free
163Software Foundation, write to the Free Software Foundation; we sometimes
164make exceptions for this. Our decision will be guided by the two goals
165of preserving the free status of all derivatives of our free software and
166of promoting the sharing and reuse of software generally.
167
168 NO WARRANTY
169
170 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
171FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
172OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
173PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
174OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
175MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
176TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
177PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
178REPAIR OR CORRECTION.
179
180 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
181WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
182REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
183INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
184OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
185TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
186YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
187PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
188POSSIBILITY OF SUCH DAMAGES.
189
190 END OF TERMS AND CONDITIONS
191\f
192 Appendix: How to Apply These Terms to Your New Programs
193
194 If you develop a new program, and you want it to be of the greatest
195possible use to humanity, the best way to achieve this is to make it
196free software which everyone can redistribute and change under these
197terms.
198
199 To do so, attach the following notices to the program. It is safest to
200attach them to the start of each source file to most effectively convey
201the exclusion of warranty; and each file should have at least the
202"copyright" line and a pointer to where the full notice is found.
203
204 <one line to give the program's name and a brief idea of what it does.>
205 Copyright (C) 19yy <name of author>
206
207 This program is free software; you can redistribute it and/or modify
208 it under the terms of the GNU General Public License as published by
209 the Free Software Foundation; either version 1, or (at your option)
210 any later version.
211
212 This program is distributed in the hope that it will be useful,
213 but WITHOUT ANY WARRANTY; without even the implied warranty of
214 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
215 GNU General Public License for more details.
216
217 You should have received a copy of the GNU General Public License
8d814b80 218 along with this program; if not, write to the Free Software Foundation,
219 Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
a687059c 220
221Also add information on how to contact you by electronic and paper mail.
222
223If the program is interactive, make it output a short notice like this
224when it starts in an interactive mode:
225
226 Gnomovision version 69, Copyright (C) 19xx name of author
227 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
228 This is free software, and you are welcome to redistribute it
229 under certain conditions; type `show c' for details.
230
231The hypothetical commands `show w' and `show c' should show the
232appropriate parts of the General Public License. Of course, the
233commands you use may be called something other than `show w' and `show
234c'; they could even be mouse-clicks or menu items--whatever suits your
235program.
236
237You should also get your employer (if you work as a programmer) or your
238school, if any, to sign a "copyright disclaimer" for the program, if
239necessary. Here a sample; alter the names:
240
241 Yoyodyne, Inc., hereby disclaims all copyright interest in the
242 program `Gnomovision' (a program to direct compilers to make passes
243 at assemblers) written by James Hacker.
244
245 <signature of Ty Coon>, 1 April 1989
246 Ty Coon, President of Vice
247
248That's all there is to it!