COPYING revision 1.1.2.2 1
2 GNU GENERAL PUBLIC LICENSE
3 Version 1, February 1989
4
5 Copyright (C) 1989 Free Software Foundation, Inc.
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
12 at the mercy of those companies. By contrast, our General Public
13 License is intended to guarantee your freedom to share and change free
14 software--to make sure the software is free for all its users. The
15 General Public License applies to the Free Software Foundation's
16 software and to any other program whose authors commit to using it.
17 You can use it for your programs, too.
18
19 When we speak of free software, we are referring to freedom, not
20 price. Specifically, the General Public License is designed to make
21 sure that you have the freedom to give away or sell copies of free
22 software, that you receive source code or can get it if you want it,
23 that you can change the software or use pieces of it in new free
24 programs; and that you know you can do these things.
25
26 To protect your rights, we need to make restrictions that forbid
27 anyone to deny you these rights or to ask you to surrender the rights.
28 These restrictions translate to certain responsibilities for you if you
29 distribute copies of the software, or if you modify it.
30
31 For example, if you distribute copies of a such a program, whether
32 gratis or for a fee, you must give the recipients all the rights that
33 you have. You must make sure that they, too, receive or can get the
34 source 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,
38 distribute and/or modify the software.
39
40 Also, for each author's protection and ours, we want to make certain
41 that everyone understands that there is no warranty for this free
42 software. If the software is modified by someone else and passed on, we
43 want its recipients to know that what they have is not the original, so
44 that any problems introduced by others will not reflect on the original
45 authors' reputations.
46
47 The precise terms and conditions for copying, distribution and
48 modification follow.
49
51 GNU GENERAL PUBLIC LICENSE
52 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
53
54 0. This License Agreement applies to any program or other work which
55 contains a notice placed by the copyright holder saying it may be
56 distributed under the terms of this General Public License. The
57 "Program", below, refers to any such program or work, and a "work based
58 on the Program" means either the Program or any work containing the
59 Program or a portion of it, either verbatim or with modifications. Each
60 licensee is addressed as "you".
61
62 1. You may copy and distribute verbatim copies of the Program's source
63 code as you receive it, in any medium, provided that you conspicuously and
64 appropriately publish on each copy an appropriate copyright notice and
65 disclaimer of warranty; keep intact all the notices that refer to this
66 General Public License and to the absence of any warranty; and give any
67 other recipients of the Program a copy of this General Public License
68 along with the Program. You may charge a fee for the physical act of
69 transferring a copy.
70
71 2. You may modify your copy or copies of the Program or any portion of
72 it, and copy and distribute such modifications under the terms of Paragraph
73 1 above, provided that you also do the following:
74
75 a) cause the modified files to carry prominent notices stating that
76 you changed the files and the date of any change; and
77
78 b) cause the whole of any work that you distribute or publish, that
79 in whole or in part contains the Program or any part thereof, either
80 with or without modifications, to be licensed at no charge to all
81 third parties under the terms of this General Public License (except
82 that you may choose to grant warranty protection to some or all
83 third parties, at your option).
84
85 c) If the modified program normally reads commands interactively when
86 run, you must cause it, when started running for such interactive use
87 in the simplest and most usual way, to print or display an
88 announcement including an appropriate copyright notice and a notice
89 that there is no warranty (or else, saying that you provide a
90 warranty) and that users may redistribute the program under these
91 conditions, and telling the user how to view a copy of this General
92 Public License.
93
94 d) You may charge a fee for the physical act of transferring a
95 copy, and you may at your option offer warranty protection in
96 exchange for a fee.
97
98 Mere aggregation of another independent work with the Program (or its
99 derivative) on a volume of a storage or distribution medium does not bring
100 the other work under the scope of these terms.
101
103 3. You may copy and distribute the Program (or a portion or derivative of
104 it, under Paragraph 2) in object code or executable form under the terms of
105 Paragraphs 1 and 2 above provided that you also do one of the following:
106
107 a) accompany it with the complete corresponding machine-readable
108 source code, which must be distributed under the terms of
109 Paragraphs 1 and 2 above; or,
110
111 b) accompany it with a written offer, valid for at least three
112 years, to give any third party free (except for a nominal charge
113 for the cost of distribution) a complete machine-readable copy of the
114 corresponding source code, to be distributed under the terms of
115 Paragraphs 1 and 2 above; or,
116
117 c) accompany it with the information you received as to where the
118 corresponding source code may be obtained. (This alternative is
119 allowed only for noncommercial distribution and only if you
120 received the program in object code or executable form alone.)
121
122 Source code for a work means the preferred form of the work for making
123 modifications to it. For an executable file, complete source code means
124 all the source code for all modules it contains; but, as a special
125 exception, it need not include source code for modules which are standard
126 libraries that accompany the operating system on which the executable
127 file runs, or for standard header files or definitions files that
128 accompany that operating system.
129
130 4. You may not copy, modify, sublicense, distribute or transfer the
131 Program except as expressly provided under this General Public License.
132 Any attempt otherwise to copy, modify, sublicense, distribute or transfer
133 the Program is void, and will automatically terminate your rights to use
134 the Program under this License. However, parties who have received
135 copies, or rights to use copies, from you under this General Public
136 License will not have their licenses terminated so long as such parties
137 remain in full compliance.
138
139 5. By copying, distributing or modifying the Program (or any work based
140 on the Program) you indicate your acceptance of this license to do so,
141 and all its terms and conditions.
142
143 6. Each time you redistribute the Program (or any work based on the
144 Program), the recipient automatically receives a license from the original
145 licensor to copy, distribute or modify the Program subject to these
146 terms and conditions. You may not impose any further restrictions on the
147 recipients' exercise of the rights granted herein.
148
150 7. The Free Software Foundation may publish revised and/or new versions
151 of the General Public License from time to time. Such new versions will
152 be similar in spirit to the present version, but may differ in detail to
153 address new problems or concerns.
154
155 Each version is given a distinguishing version number. If the Program
156 specifies a version number of the license which applies to it and "any
157 later version", you have the option of following the terms and conditions
158 either of that version or of any later version published by the Free
159 Software Foundation. If the Program does not specify a version number of
160 the license, you may choose any version ever published by the Free Software
161 Foundation.
162
163 8. If you wish to incorporate parts of the Program into other free
164 programs whose distribution conditions are different, write to the author
165 to ask for permission. For software which is copyrighted by the Free
166 Software Foundation, write to the Free Software Foundation; we sometimes
167 make exceptions for this. Our decision will be guided by the two goals
168 of preserving the free status of all derivatives of our free software and
169 of promoting the sharing and reuse of software generally.
170
171 NO WARRANTY
172
173 9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
174 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
175 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
176 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
177 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
178 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
179 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
180 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
181 REPAIR OR CORRECTION.
182
183 10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
184 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
185 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
186 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
187 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
188 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
189 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
190 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
191 POSSIBILITY OF SUCH DAMAGES.
192
193 END OF TERMS AND CONDITIONS
194
196 Appendix: How to Apply These Terms to Your New Programs
197
198 If you develop a new program, and you want it to be of the greatest
199 possible use to humanity, the best way to achieve this is to make it
200 free software which everyone can redistribute and change under these
201 terms.
202
203 To do so, attach the following notices to the program. It is safest to
204 attach them to the start of each source file to most effectively convey
205 the exclusion of warranty; and each file should have at least the
206 "copyright" line and a pointer to where the full notice is found.
207
208 <one line to give the program's name and a brief idea of what it does.>
209 Copyright (C) 19yy <name of author>
210
211 This program is free software; you can redistribute it and/or modify
212 it under the terms of the GNU General Public License as published by
213 the Free Software Foundation; either version 1, or (at your option)
214 any later version.
215
216 This program is distributed in the hope that it will be useful,
217 but WITHOUT ANY WARRANTY; without even the implied warranty of
218 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
219 GNU General Public License for more details.
220
221 You should have received a copy of the GNU General Public License
222 along with this program; if not, write to the Free Software
223 Foundation, Inc.
224
225 Also add information on how to contact you by electronic and paper mail.
226
227 If the program is interactive, make it output a short notice like this
228 when it starts in an interactive mode:
229
230 Gnomovision version 69, Copyright (C) 19xx name of author
231 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
232 This is free software, and you are welcome to redistribute it
233 under certain conditions; type `show c' for details.
234
235 The hypothetical commands `show w' and `show c' should show the
236 appropriate parts of the General Public License. Of course, the
237 commands you use may be called something other than `show w' and `show
238 c'; they could even be mouse-clicks or menu items--whatever suits your
239 program.
240
241 You should also get your employer (if you work as a programmer) or your
242 school, if any, to sign a "copyright disclaimer" for the program, if
243 necessary. Here a sample; alter the names:
244
245 Yoyodyne, Inc., hereby disclaims all copyright interest in the
246 program `Gnomovision' (a program to direct compilers to make passes
247 at assemblers) written by James Hacker.
248
249 <signature of Ty Coon>, 1 April 1989
250 Ty Coon, President of Vice
251
252 That's all there is to it!
253