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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 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA | ||
6 | |||
7 | Everyone is permitted to copy and distribute verbatim copies | ||
8 | of this license document, but changing it is not allowed. | ||
9 | |||
10 | Preamble | ||
11 | The licenses for most software are designed to take away your freedom | ||
12 | to share and change it. By contrast, the GNU General Public License | ||
13 | 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 | ||
17 | to using it. (Some other Free Software Foundation software is covered | ||
18 | by the GNU Library General Public License instead.) You can apply it | ||
19 | to 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 | ||
24 | for this service if you wish), that you receive source code or can | ||
25 | get it if you want it, that you can change the software or use pieces | ||
26 | of it in new free programs; and that you know you can do these | ||
27 | things. | ||
28 | |||
29 | To protect your rights, we need to make restrictions that forbid | ||
30 | anyone to deny you these rights or to ask you to surrender the | ||
31 | rights. These restrictions translate to certain responsibilities for | ||
32 | you if you distribute copies of the software, or if you modify it. | ||
33 | |||
34 | For example, if you distribute copies of such a program, whether | ||
35 | gratis or for a fee, you must give the recipients all the rights that | ||
36 | you have. You must make sure that they, too, receive or can get the | ||
37 | source code. And you must show them these terms so they know their | ||
38 | rights. | ||
39 | |||
40 | We protect your rights with two steps: (1) copyright the software, | ||
41 | and (2) offer you this license which gives you legal permission to | ||
42 | copy, distribute and/or modify the software. | ||
43 | |||
44 | Also, for each author's protection and ours, we want to make certain | ||
45 | that everyone understands that there is no warranty for this free | ||
46 | software. If the software is modified by someone else and passed on, | ||
47 | we want its recipients to know that what they have is not the | ||
48 | original, so that any problems introduced by others will not reflect | ||
49 | on the original authors' reputations. | ||
50 | |||
51 | Finally, any free program is threatened constantly by software | ||
52 | patents. We wish to avoid the danger that redistributors of a free | ||
53 | program will individually obtain patent licenses, in effect making | ||
54 | the program proprietary. To prevent this, we have made it clear that | ||
55 | any patent must be licensed for everyone's free use or not licensed | ||
56 | at all. | ||
57 | |||
58 | The precise terms and conditions for copying, distribution and | ||
59 | modification follow. | ||
60 | |||
61 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | ||
62 | 0. This License applies to any program or other work which contains a | ||
63 | 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 | ||
75 | Program is covered only if its contents constitute a work based on | ||
76 | the 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 | ||
84 | warranty; and give any other recipients of the Program a copy of this | ||
85 | License 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 | ||
89 | fee. | ||
90 | |||
91 | 2. You may modify your copy or copies of the Program or any portion | ||
92 | of it, thus forming a work based on the Program, and copy and | ||
93 | distribute such modifications or work under the terms of Section 1 | ||
94 | above, provided that you also meet all of these conditions: | ||
95 | |||
96 | |||
97 | a) You must cause the modified files to carry prominent notices | ||
98 | stating that you changed the files and the date of any change. | ||
99 | |||
100 | b) You must cause any work that you distribute or publish, that in | ||
101 | whole or in part contains or is derived from the Program or any part | ||
102 | thereof, to be licensed as a whole at no charge to all third parties | ||
103 | under the terms of this License. | ||
104 | |||
105 | c) If the modified program normally reads commands interactively when | ||
106 | run, you must cause it, when started running for such interactive use | ||
107 | in the most ordinary way, to print or display an announcement | ||
108 | including an appropriate copyright notice and a notice that there is | ||
109 | no warranty (or else, saying that you provide a warranty) and that | ||
110 | users may redistribute the program under these conditions, and | ||
111 | telling the user how to view a copy of this License. (Exception: if | ||
112 | the Program itself is interactive but does not normally print such an | ||
113 | announcement, your work based on the Program is not required to print | ||
114 | an announcement.) | ||
115 | These requirements apply to the modified work as a whole. If | ||
116 | identifiable sections of that work are not derived from the Program, | ||
117 | and can be reasonably considered independent and separate works in | ||
118 | themselves, then this License, and its terms, do not apply to those | ||
119 | sections when you distribute them as separate works. But when you | ||
120 | distribute the same sections as part of a whole which is a work based | ||
121 | on the Program, the distribution of the whole must be on the terms of | ||
122 | this License, whose permissions for other licensees extend to the | ||
123 | entire whole, and thus to each and every part regardless of who wrote | ||
124 | it. | ||
125 | Thus, it is not the intent of this section to claim rights or contest | ||
126 | your rights to work written entirely by you; rather, the intent is to | ||
127 | exercise the right to control the distribution of derivative or | ||
128 | collective works based on the Program. | ||
129 | |||
130 | In addition, mere aggregation of another work not based on the | ||
131 | Program with the Program (or with a work based on the Program) on a | ||
132 | volume of a storage or distribution medium does not bring the other | ||
133 | work under the scope of this License. | ||
134 | |||
135 | 3. You may copy and distribute the Program (or a work based on it, | ||
136 | under Section 2) in object code or executable form under the terms of | ||
137 | Sections 1 and 2 above provided that you also do one of the | ||
138 | following: | ||
139 | |||
140 | a) Accompany it with the complete corresponding machine-readable | ||
141 | source code, which must be distributed under the terms of Sections 1 | ||
142 | and 2 above on a medium customarily used for software interchange; | ||
143 | or, | ||
144 | |||
145 | b) Accompany it with a written offer, valid for at least three years, | ||
146 | to give any third party, for a charge no more than your cost of | ||
147 | physically performing source distribution, a complete | ||
148 | machine-readable copy of the corresponding source code, to be | ||
149 | distributed under the terms of Sections 1 and 2 above on a medium | ||
150 | customarily used for software interchange; or, | ||
151 | |||
152 | c) Accompany it with the information you received as to the offer to | ||
153 | distribute corresponding source code. (This alternative is allowed | ||
154 | only for noncommercial distribution and only if you received the | ||
155 | program in object code or executable form with such an offer, in | ||
156 | accord with Subsection b above.) | ||
157 | The source code for a work means the preferred form of the work for | ||
158 | making modifications to it. For an executable work, complete source | ||
159 | code means all the source code for all modules it contains, plus any | ||
160 | associated interface definition files, plus the scripts used to | ||
161 | control compilation and installation of the executable. However, as a | ||
162 | special exception, the source code distributed need not include | ||
163 | anything that is normally distributed (in either source or binary | ||
164 | form) with the major components (compiler, kernel, and so on) of the | ||
165 | operating system on which the executable runs, unless that component | ||
166 | itself accompanies the executable. | ||
167 | If distribution of executable or object code is made by offering | ||
168 | access to copy from a designated place, then offering equivalent | ||
169 | access to copy the source code from the same place counts as | ||
170 | distribution of the source code, even though third parties are not | ||
171 | compelled to copy the source along with the object code. | ||
172 | |||
173 | 4. You may not copy, modify, sublicense, or distribute the Program | ||
174 | except as expressly provided under this License. Any attempt | ||
175 | otherwise to copy, modify, sublicense or distribute the Program is | ||
176 | void, and will automatically terminate your rights under this | ||
177 | License. However, parties who have received copies, or rights, from | ||
178 | you under this License will not have their licenses terminated so | ||
179 | long as such parties remain in full compliance. | ||
180 | |||
181 | 5. You are not required to accept this License, since you have not | ||
182 | signed it. However, nothing else grants you permission to modify or | ||
183 | distribute the Program or its derivative works. These actions are | ||
184 | prohibited by law if you do not accept this License. Therefore, by | ||
185 | modifying or distributing the Program (or any work based on the | ||
186 | Program), you indicate your acceptance of this License to do so, and | ||
187 | all its terms and conditions for copying, distributing or modifying | ||
188 | the Program or works based on it. | ||
189 | |||
190 | 6. Each time you redistribute the Program (or any work based on the | ||
191 | Program), the recipient automatically receives a license from the | ||
192 | original licensor to copy, distribute or modify the Program subject | ||
193 | to these terms and conditions. You may not impose any further | ||
194 | restrictions on the recipients' exercise of the rights granted | ||
195 | herein. You are not responsible for enforcing compliance by third | ||
196 | parties to this License. | ||
197 | |||
198 | 7. If, as a consequence of a court judgment or allegation of patent | ||
199 | infringement or for any other reason (not limited to patent issues), | ||
200 | conditions are imposed on you (whether by court order, agreement or | ||
201 | otherwise) that contradict the conditions of this License, they do | ||
202 | not excuse you from the conditions of this License. If you cannot | ||
203 | distribute so as to satisfy simultaneously your obligations under | ||
204 | this License and any other pertinent obligations, then as a | ||
205 | consequence you may not distribute the Program at all. For example, | ||
206 | if a patent license would not permit royalty-free redistribution of | ||
207 | the Program by all those who receive copies directly or indirectly | ||
208 | through you, then the only way you could satisfy both it and this | ||
209 | License would be to refrain entirely from distribution of the | ||
210 | Program. | ||
211 | |||
212 | If any portion of this section is held invalid or unenforceable under | ||
213 | any particular circumstance, the balance of the section is intended | ||
214 | to apply and the section as a whole is intended to apply in other | ||
215 | circumstances. | ||
216 | |||
217 | It is not the purpose of this section to induce you to infringe any | ||
218 | patents or other property right claims or to contest validity of any | ||
219 | such claims; this section has the sole purpose of protecting the | ||
220 | integrity of the free software distribution system, which is | ||
221 | implemented by public license practices. Many people have made | ||
222 | generous contributions to the wide range of software distributed | ||
223 | through that system in reliance on consistent application of that | ||
224 | system; it is up to the author/donor to decide if he or she is | ||
225 | willing to distribute software through any other system and a | ||
226 | licensee cannot impose that choice. | ||
227 | |||
228 | This section is intended to make thoroughly clear what is believed to | ||
229 | be a consequence of the rest of this License. | ||
230 | |||
231 | 8. If the distribution and/or use of the Program is restricted in | ||
232 | certain countries either by patents or by copyrighted interfaces, the | ||
233 | original copyright holder who places the Program under this License | ||
234 | may add an explicit geographical distribution limitation excluding | ||
235 | those countries, so that distribution is permitted only in or among | ||
236 | countries not thus excluded. In such case, this License incorporates | ||
237 | the limitation as if written in the body of this License. | ||
238 | |||
239 | 9. The Free Software Foundation may publish revised and/or new | ||
240 | versions of the General Public License from time to time. Such new | ||
241 | versions will be similar in spirit to the present version, but may | ||
242 | differ in detail to address new problems or concerns. | ||
243 | |||
244 | Each version is given a distinguishing version number. If the Program | ||
245 | specifies a version number of this License which applies to it and | ||
246 | "any later version", you have the option of following the terms and | ||
247 | conditions either of that version or of any later version published | ||
248 | by the Free Software Foundation. If the Program does not specify a | ||
249 | version number of this License, you may choose any version ever | ||
250 | published by the Free Software Foundation. | ||
251 | |||
252 | 10. If you wish to incorporate parts of the Program into other free | ||
253 | programs whose distribution conditions are different, write to the | ||
254 | author to ask for permission. For software which is copyrighted by | ||
255 | the Free Software Foundation, write to the Free Software Foundation; | ||
256 | we sometimes make exceptions for this. Our decision will be guided by | ||
257 | the two goals of preserving the free status of all derivatives of our | ||
258 | free software and of promoting the sharing and reuse of software | ||
259 | generally. | ||
260 | |||
261 | NO WARRANTY | ||
262 | |||
263 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO | ||
264 | WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. | ||
265 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR | ||
266 | OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY | ||
267 | KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE | ||
268 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
269 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE | ||
270 | PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME | ||
271 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. | ||
272 | |||
273 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN | ||
274 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY | ||
275 | AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU | ||
276 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR | ||
277 | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE | ||
278 | PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING | ||
279 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A | ||
280 | FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF | ||
281 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF | ||
282 | SUCH DAMAGES. | ||
283 | |||
284 | |||
285 | END OF TERMS AND CONDITIONS | ||
286 | How to Apply These Terms to Your New Programs | ||
287 | If you develop a new program, and you want it to be of the greatest | ||
288 | possible use to the public, the best way to achieve this is to make | ||
289 | it free software which everyone can redistribute and change under | ||
290 | these terms. | ||
291 | |||
292 | To do so, attach the following notices to the program. It is safest | ||
293 | to attach them to the start of each source file to most effectively | ||
294 | convey the exclusion of warranty; and each file should have at least | ||
295 | the "copyright" line and a pointer to where the full notice is found. | ||
296 | |||
297 | one line to give the program's name and an idea of what it does. | ||
298 | Copyright (C) yyyy name of author | ||
299 | |||
300 | This program is free software; you can redistribute it and/or | ||
301 | modify it under the terms of the GNU General Public License | ||
302 | as published by the Free Software Foundation; either version 2 | ||
303 | of the License, or (at your option) any later version. | ||
304 | |||
305 | This program is distributed in the hope that it will be useful, | ||
306 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
307 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
308 | GNU General Public License for more details. | ||
309 | |||
310 | You should have received a copy of the GNU General Public License | ||
311 | along with this program; if not, write to the Free Software | ||
312 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | ||
313 | 02111-1307, USA. | ||
314 | |||
315 | Also add information on how to contact you by electronic and paper | ||
316 | mail. | ||
317 | |||
318 | If the program is interactive, make it output a short notice like | ||
319 | this when it starts in an interactive mode: | ||
320 | |||
321 | Gnomovision version 69, Copyright (C) yyyy name of author | ||
322 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details | ||
323 | type `show w'. This is free software, and you are welcome | ||
324 | to redistribute it under certain conditions; type `show c' | ||
325 | for details. | ||
326 | |||
327 | The hypothetical commands `show w' and `show c' should show the | ||
328 | appropriate parts of the General Public License. Of course, the | ||
329 | commands you use may be called something other than `show w' and | ||
330 | `show c'; they could even be mouse-clicks or menu items--whatever | ||
331 | suits your program. | ||
332 | |||
333 | You should also get your employer (if you work as a programmer) or | ||
334 | your school, if any, to sign a "copyright disclaimer" for the | ||
335 | program, if necessary. Here is a sample; alter the names: | ||
336 | |||
337 | Yoyodyne, Inc., hereby disclaims all copyright | ||
338 | interest in the program `Gnomovision' | ||
339 | (which makes passes at compilers) written | ||
340 | by James Hacker. | ||
341 | |||
342 | signature of Ty Coon, 1 April 1989 | ||
343 | Ty Coon, President of Vice | ||
344 | |||
345 | This General Public License does not permit incorporating your | ||
346 | program into proprietary programs. If your program is a subroutine | ||
347 | library, you may consider it more useful to permit linking | ||
348 | proprietary applications with the library. If this is what you want | ||
349 | to do, use the GNU Library General Public License instead of this | ||
350 | License. | ||
351 | |||
352 | |||
353 | ---------------------------------------------------------------------- | ||
354 | ---------- | ||
355 | Return to GNU's home page. | ||
356 | FSF & GNU inquiries & questions to gnu@gnu.org. Other ways to contact | ||
357 | the FSF. | ||
358 | |||
359 | Comments on these web pages to webmasters@www.gnu.org, send other | ||
360 | questions to gnu@gnu.org. | ||
361 | |||
362 | Copyright notice above. | ||
363 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | ||
364 | MA 02111, USA | ||
365 | |||
366 | Updated: 16 Feb 1998 tower | ||
367 | |||