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1 | GNU GENERAL PUBLIC LICENSE | ||
2 | Version 2, June 1991 | ||
3 | |||
4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc. | ||
5 | 675 Mass Ave, Cambridge, MA 02139, USA | ||
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 licenses for most software are designed to take away your | ||
12 | freedom to share and change it. By contrast, the GNU 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. This | ||
15 | General Public License applies to most of the Free Software | ||
16 | Foundation's software and to any other program whose authors commit to | ||
17 | using it. (Some other Free Software Foundation software is covered by | ||
18 | the GNU Library General Public License instead.) You can apply it to | ||
19 | your programs, too. | ||
20 | |||
21 | When we speak of free software, we are referring to freedom, not | ||
22 | price. Our General Public Licenses are designed to make sure that you | ||
23 | have the freedom to distribute copies of free software (and charge for | ||
24 | this service if you wish), that you receive source code or can get it | ||
25 | if you want it, that you can change the software or use pieces of it | ||
26 | in new free programs; and that you know you can do these things. | ||
27 | |||
28 | To protect your rights, we need to make restrictions that forbid | ||
29 | anyone to deny you these rights or to ask you to surrender the rights. | ||
30 | These restrictions translate to certain responsibilities for you if you | ||
31 | distribute copies of the software, or if you modify it. | ||
32 | |||
33 | For example, if you distribute copies of such a program, whether | ||
34 | gratis or for a fee, you must give the recipients all the rights that | ||
35 | you have. You must make sure that they, too, receive or can get the | ||
36 | source code. And you must show them these terms so they know their | ||
37 | rights. | ||
38 | |||
39 | We protect your rights with two steps: (1) copyright the software, and | ||
40 | (2) offer you this license which gives you legal permission to copy, | ||
41 | distribute and/or modify the software. | ||
42 | |||
43 | Also, for each author's protection and ours, we want to make certain | ||
44 | that everyone understands that there is no warranty for this free | ||
45 | software. If the software is modified by someone else and passed on, we | ||
46 | want its recipients to know that what they have is not the original, so | ||
47 | that any problems introduced by others will not reflect on the original | ||
48 | authors' reputations. | ||
49 | |||
50 | Finally, any free program is threatened constantly by software | ||
51 | patents. We wish to avoid the danger that redistributors of a free | ||
52 | program will individually obtain patent licenses, in effect making the | ||
53 | program proprietary. To prevent this, we have made it clear that any | ||
54 | patent must be licensed for everyone's free use or not licensed at all. | ||
55 | |||
56 | The precise terms and conditions for copying, distribution and | ||
57 | modification follow. | ||
58 | |||
59 | GNU GENERAL PUBLIC LICENSE | ||
60 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | ||
61 | |||
62 | 0. This License applies to any program or other work which contains | ||
63 | a notice placed by the copyright holder saying it may be distributed | ||
64 | under the terms of this General Public License. The "Program", below, | ||
65 | refers to any such program or work, and a "work based on the Program" | ||
66 | means either the Program or any derivative work under copyright law: | ||
67 | that is to say, a work containing the Program or a portion of it, | ||
68 | either verbatim or with modifications and/or translated into another | ||
69 | language. (Hereinafter, translation is included without limitation in | ||
70 | the term "modification".) Each licensee is addressed as "you". | ||
71 | |||
72 | Activities other than copying, distribution and modification are not | ||
73 | covered by this License; they are outside its scope. The act of | ||
74 | running the Program is not restricted, and the output from the Program | ||
75 | is covered only if its contents constitute a work based on the | ||
76 | Program (independent of having been made by running the Program). | ||
77 | Whether that is true depends on what the Program does. | ||
78 | |||
79 | 1. You may copy and distribute verbatim copies of the Program's | ||
80 | source code as you receive it, in any medium, provided that you | ||
81 | conspicuously and appropriately publish on each copy an appropriate | ||
82 | copyright notice and disclaimer of warranty; keep intact all the | ||
83 | notices that refer to this License and to the absence of any warranty; | ||
84 | and give any other recipients of the Program a copy of this License | ||
85 | along with the Program. | ||
86 | |||
87 | You may charge a fee for the physical act of transferring a copy, and | ||
88 | you may at your option offer warranty protection in exchange for a fee. | ||
89 | |||
90 | 2. You may modify your copy or copies of the Program or any portion | ||
91 | of it, thus forming a work based on the Program, and copy and | ||
92 | distribute such modifications or work under the terms of Section 1 | ||
93 | above, provided that you also meet all of these conditions: | ||
94 | |||
95 | a) You must cause the modified files to carry prominent notices | ||
96 | stating that you changed the files and the date of any change. | ||
97 | |||
98 | b) You must cause any work that you distribute or publish, that in | ||
99 | whole or in part contains or is derived from the Program or any | ||
100 | part thereof, to be licensed as a whole at no charge to all third | ||
101 | parties under the terms of this License. | ||
102 | |||
103 | c) If the modified program normally reads commands interactively | ||
104 | when run, you must cause it, when started running for such | ||
105 | interactive use in the most ordinary way, to print or display an | ||
106 | announcement including an appropriate copyright notice and a | ||
107 | notice that there is no warranty (or else, saying that you provide | ||
108 | a warranty) and that users may redistribute the program under | ||
109 | these conditions, and telling the user how to view a copy of this | ||
110 | License. (Exception: if the Program itself is interactive but | ||
111 | does not normally print such an announcement, your work based on | ||
112 | the Program is not required to print an announcement.) | ||
113 | |||
114 | These requirements apply to the modified work as a whole. If | ||
115 | identifiable sections of that work are not derived from the Program, | ||
116 | and can be reasonably considered independent and separate works in | ||
117 | themselves, then this License, and its terms, do not apply to those | ||
118 | sections when you distribute them as separate works. But when you | ||
119 | distribute the same sections as part of a whole which is a work based | ||
120 | on the Program, the distribution of the whole must be on the terms of | ||
121 | this License, whose permissions for other licensees extend to the | ||
122 | entire whole, and thus to each and every part regardless of who wrote it. | ||
123 | |||
124 | Thus, it is not the intent of this section to claim rights or contest | ||
125 | your rights to work written entirely by you; rather, the intent is to | ||
126 | exercise the right to control the distribution of derivative or | ||
127 | collective works based on the Program. | ||
128 | |||
129 | In addition, mere aggregation of another work not based on the Program | ||
130 | with the Program (or with a work based on the Program) on a volume of | ||
131 | a storage or distribution medium does not bring the other work under | ||
132 | the scope of this License. | ||
133 | |||
134 | 3. You may copy and distribute the Program (or a work based on it, | ||
135 | under Section 2) in object code or executable form under the terms of | ||
136 | Sections 1 and 2 above provided that you also do one of the following: | ||
137 | |||
138 | a) Accompany it with the complete corresponding machine-readable | ||
139 | source code, which must be distributed under the terms of Sections | ||
140 | 1 and 2 above on a medium customarily used for software interchange; or, | ||
141 | |||
142 | b) Accompany it with a written offer, valid for at least three | ||
143 | years, to give any third party, for a charge no more than your | ||
144 | cost of physically performing source distribution, a complete | ||
145 | machine-readable copy of the corresponding source code, to be | ||
146 | distributed under the terms of Sections 1 and 2 above on a medium | ||
147 | customarily used for software interchange; or, | ||
148 | |||
149 | c) Accompany it with the information you received as to the offer | ||
150 | to distribute corresponding source code. (This alternative is | ||
151 | allowed only for noncommercial distribution and only if you | ||
152 | received the program in object code or executable form with such | ||
153 | an offer, in accord with Subsection b above.) | ||
154 | |||
155 | The source code for a work means the preferred form of the work for | ||
156 | making modifications to it. For an executable work, complete source | ||
157 | code means all the source code for all modules it contains, plus any | ||
158 | associated interface definition files, plus the scripts used to | ||
159 | control compilation and installation of the executable. However, as a | ||
160 | special exception, the source code distributed need not include | ||
161 | anything that is normally distributed (in either source or binary | ||
162 | form) with the major components (compiler, kernel, and so on) of the | ||
163 | operating system on which the executable runs, unless that component | ||
164 | itself accompanies the executable. | ||
165 | |||
166 | If distribution of executable or object code is made by offering | ||
167 | access to copy from a designated place, then offering equivalent | ||
168 | access to copy the source code from the same place counts as | ||
169 | distribution of the source code, even though third parties are not | ||
170 | compelled to copy the source along with the object code. | ||
171 | |||
172 | 4. You may not copy, modify, sublicense, or distribute the Program | ||
173 | except as expressly provided under this License. Any attempt | ||
174 | otherwise to copy, modify, sublicense or distribute the Program is | ||
175 | void, and will automatically terminate your rights under this License. | ||
176 | However, parties who have received copies, or rights, from you under | ||
177 | this License will not have their licenses terminated so long as such | ||
178 | parties remain in full compliance. | ||
179 | |||
180 | 5. You are not required to accept this License, since you have not | ||
181 | signed it. However, nothing else grants you permission to modify or | ||
182 | distribute the Program or its derivative works. These actions are | ||
183 | prohibited by law if you do not accept this License. Therefore, by | ||
184 | modifying or distributing the Program (or any work based on the | ||
185 | Program), you indicate your acceptance of this License to do so, and | ||
186 | all its terms and conditions for copying, distributing or modifying | ||
187 | the Program or works based on it. | ||
188 | |||
189 | 6. Each time you redistribute the Program (or any work based on the | ||
190 | Program), the recipient automatically receives a license from the | ||
191 | original licensor to copy, distribute or modify the Program subject to | ||
192 | these terms and conditions. You may not impose any further | ||
193 | restrictions on the recipients' exercise of the rights granted herein. | ||
194 | You are not responsible for enforcing compliance by third parties to | ||
195 | this License. | ||
196 | |||
197 | 7. If, as a consequence of a court judgment or allegation of patent | ||
198 | infringement or for any other reason (not limited to patent issues), | ||
199 | conditions are imposed on you (whether by court order, agreement or | ||
200 | otherwise) that contradict the conditions of this License, they do not | ||
201 | excuse you from the conditions of this License. If you cannot | ||
202 | distribute so as to satisfy simultaneously your obligations under this | ||
203 | License and any other pertinent obligations, then as a consequence you | ||
204 | may not distribute the Program at all. For example, if a patent | ||
205 | license would not permit royalty-free redistribution of the Program by | ||
206 | all those who receive copies directly or indirectly through you, then | ||
207 | the only way you could satisfy both it and this License would be to | ||
208 | refrain entirely from distribution of the Program. | ||
209 | |||
210 | If any portion of this section is held invalid or unenforceable under | ||
211 | any particular circumstance, the balance of the section is intended to | ||
212 | apply and the section as a whole is intended to apply in other | ||
213 | circumstances. | ||
214 | |||
215 | It is not the purpose of this section to induce you to infringe any | ||
216 | patents or other property right claims or to contest validity of any | ||
217 | such claims; this section has the sole purpose of protecting the | ||
218 | integrity of the free software distribution system, which is | ||
219 | implemented by public license practices. Many people have made | ||
220 | generous contributions to the wide range of software distributed | ||
221 | through that system in reliance on consistent application of that | ||
222 | system; it is up to the author/donor to decide if he or she is willing | ||
223 | to distribute software through any other system and a licensee cannot | ||
224 | impose that choice. | ||
225 | |||
226 | This section is intended to make thoroughly clear what is believed to | ||
227 | be a consequence of the rest of this License. | ||
228 | |||
229 | 8. If the distribution and/or use of the Program is restricted in | ||
230 | certain countries either by patents or by copyrighted interfaces, the | ||
231 | original copyright holder who places the Program under this License | ||
232 | may add an explicit geographical distribution limitation excluding | ||
233 | those countries, so that distribution is permitted only in or among | ||
234 | countries not thus excluded. In such case, this License incorporates | ||
235 | the limitation as if written in the body of this License. | ||
236 | |||
237 | 9. The Free Software Foundation may publish revised and/or new versions | ||
238 | of the General Public License from time to time. Such new versions will | ||
239 | be similar in spirit to the present version, but may differ in detail to | ||
240 | address new problems or concerns. | ||
241 | |||
242 | Each version is given a distinguishing version number. If the Program | ||
243 | specifies a version number of this License which applies to it and "any | ||
244 | later version", you have the option of following the terms and conditions | ||
245 | either of that version or of any later version published by the Free | ||
246 | Software Foundation. If the Program does not specify a version number of | ||
247 | this License, you may choose any version ever published by the Free Software | ||
248 | Foundation. | ||
249 | |||
250 | 10. If you wish to incorporate parts of the Program into other free | ||
251 | programs whose distribution conditions are different, write to the author | ||
252 | to ask for permission. For software which is copyrighted by the Free | ||
253 | Software Foundation, write to the Free Software Foundation; we sometimes | ||
254 | make exceptions for this. Our decision will be guided by the two goals | ||
255 | of preserving the free status of all derivatives of our free software and | ||
256 | of promoting the sharing and reuse of software generally. | ||
257 | |||
258 | NO WARRANTY | ||
259 | |||
260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY | ||
261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN | ||
262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES | ||
263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED | ||
264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | ||
265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS | ||
266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE | ||
267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, | ||
268 | REPAIR OR CORRECTION. | ||
269 | |||
270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING | ||
271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR | ||
272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, | ||
273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING | ||
274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED | ||
275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY | ||
276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER | ||
277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE | ||
278 | POSSIBILITY OF SUCH DAMAGES. | ||
279 | |||
280 | END OF TERMS AND CONDITIONS | ||
281 | |||
282 | Appendix: How to Apply These Terms to Your New Programs | ||
283 | |||
284 | If you develop a new program, and you want it to be of the greatest | ||
285 | possible use to the public, the best way to achieve this is to make it | ||
286 | free software which everyone can redistribute and change under these terms. | ||
287 | |||
288 | To do so, attach the following notices to the program. It is safest | ||
289 | to attach them to the start of each source file to most effectively | ||
290 | convey the exclusion of warranty; and each file should have at least | ||
291 | the "copyright" line and a pointer to where the full notice is found. | ||
292 | |||
293 | <one line to give the program's name and a brief idea of what it does.> | ||
294 | Copyright (C) 19yy <name of author> | ||
295 | |||
296 | This program is free software; you can redistribute it and/or modify | ||
297 | it under the terms of the GNU General Public License as published by | ||
298 | the Free Software Foundation; either version 2 of the License, or | ||
299 | (at your option) any later version. | ||
300 | |||
301 | This program is distributed in the hope that it will be useful, | ||
302 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
304 | GNU General Public License for more details. | ||
305 | |||
306 | You should have received a copy of the GNU General Public License | ||
307 | along with this program; if not, write to the Free Software | ||
308 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
309 | |||
310 | Also add information on how to contact you by electronic and paper mail. | ||
311 | |||
312 | If the program is interactive, make it output a short notice like this | ||
313 | when it starts in an interactive mode: | ||
314 | |||
315 | Gnomovision version 69, Copyright (C) 19yy name of author | ||
316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | ||
317 | This is free software, and you are welcome to redistribute it | ||
318 | under certain conditions; type `show c' for details. | ||
319 | |||
320 | The hypothetical commands `show w' and `show c' should show the appropriate | ||
321 | parts of the General Public License. Of course, the commands you use may | ||
322 | be called something other than `show w' and `show c'; they could even be | ||
323 | mouse-clicks or menu items--whatever suits your program. | ||
324 | |||
325 | You should also get your employer (if you work as a programmer) or your | ||
326 | school, if any, to sign a "copyright disclaimer" for the program, if | ||
327 | necessary. Here is a sample; alter the names: | ||
328 | |||
329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program | ||
330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. | ||
331 | |||
332 | <signature of Ty Coon>, 1 April 1989 | ||
333 | Ty Coon, President of Vice | ||
334 | |||
335 | This General Public License does not permit incorporating your program into | ||
336 | proprietary programs. If your program is a subroutine library, you may | ||
337 | consider it more useful to permit linking proprietary applications with the | ||
338 | library. If this is what you want to do, use the GNU Library General | ||
339 | Public License instead of this License. | ||