0
|
1 The GNU General Public License (GPL)
|
|
2
|
|
3 Version 2, June 1991
|
|
4
|
|
5 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
|
6 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
7
|
|
8 Everyone is permitted to copy and distribute verbatim copies of this license
|
|
9 document, but changing it is not allowed.
|
|
10
|
|
11 Preamble
|
|
12
|
|
13 The licenses for most software are designed to take away your freedom to share
|
|
14 and change it. By contrast, the GNU General Public License is intended to
|
|
15 guarantee your freedom to share and change free software--to make sure the
|
|
16 software is free for all its users. This General Public License applies to
|
|
17 most of the Free Software Foundation's software and to any other program whose
|
|
18 authors commit to using it. (Some other Free Software Foundation software is
|
|
19 covered by the GNU Library General Public License instead.) You can apply it to
|
|
20 your programs, too.
|
|
21
|
|
22 When we speak of free software, we are referring to freedom, not price. Our
|
|
23 General Public Licenses are designed to make sure that you have the freedom to
|
|
24 distribute copies of free software (and charge for this service if you wish),
|
|
25 that you receive source code or can get it if you want it, that you can change
|
|
26 the software or use pieces of it in new free programs; and that you know you
|
|
27 can do these things.
|
|
28
|
|
29 To protect your rights, we need to make restrictions that forbid anyone to deny
|
|
30 you these rights or to ask you to surrender the rights. These restrictions
|
|
31 translate to certain responsibilities for you if you distribute copies of the
|
|
32 software, or if you modify it.
|
|
33
|
|
34 For example, if you distribute copies of such a program, whether gratis or for
|
|
35 a fee, you must give the recipients all the rights that you have. You must
|
|
36 make sure that they, too, receive or can get the source code. And you must
|
|
37 show them these terms so they know their rights.
|
|
38
|
|
39 We protect your rights with two steps: (1) copyright the software, and (2)
|
|
40 offer you this license which gives you legal permission to copy, distribute
|
|
41 and/or modify the software.
|
|
42
|
|
43 Also, for each author's protection and ours, we want to make certain that
|
|
44 everyone understands that there is no warranty for this free software. If the
|
|
45 software is modified by someone else and passed on, we want its recipients to
|
|
46 know that what they have is not the original, so that any problems introduced
|
|
47 by others will not reflect on the original authors' reputations.
|
|
48
|
|
49 Finally, any free program is threatened constantly by software patents. We
|
|
50 wish to avoid the danger that redistributors of a free program will
|
|
51 individually obtain patent licenses, in effect making the program proprietary.
|
|
52 To prevent this, we have made it clear that any patent must be licensed for
|
|
53 everyone's free use or not licensed at all.
|
|
54
|
|
55 The precise terms and conditions for copying, distribution and modification
|
|
56 follow.
|
|
57
|
|
58 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
|
|
59
|
|
60 0. This License applies to any program or other work which contains a notice
|
|
61 placed by the copyright holder saying it may be distributed under the terms of
|
|
62 this General Public License. The "Program", below, refers to any such program
|
|
63 or work, and a "work based on the Program" means either the Program or any
|
|
64 derivative work under copyright law: that is to say, a work containing the
|
|
65 Program or a portion of it, either verbatim or with modifications and/or
|
|
66 translated into another language. (Hereinafter, translation is included
|
|
67 without limitation in the term "modification".) Each licensee is addressed as
|
|
68 "you".
|
|
69
|
|
70 Activities other than copying, distribution and modification are not covered by
|
|
71 this License; they are outside its scope. The act of running the Program is
|
|
72 not restricted, and the output from the Program is covered only if its contents
|
|
73 constitute a work based on the Program (independent of having been made by
|
|
74 running the Program). Whether that is true depends on what the Program does.
|
|
75
|
|
76 1. You may copy and distribute verbatim copies of the Program's source code as
|
|
77 you receive it, in any medium, provided that you conspicuously and
|
|
78 appropriately publish on each copy an appropriate copyright notice and
|
|
79 disclaimer of warranty; keep intact all the notices that refer to this License
|
|
80 and to the absence of any warranty; and give any other recipients of the
|
|
81 Program a copy of this License along with the Program.
|
|
82
|
|
83 You may charge a fee for the physical act of transferring a copy, and you may
|
|
84 at your option offer warranty protection in exchange for a fee.
|
|
85
|
|
86 2. You may modify your copy or copies of the Program or any portion of it, thus
|
|
87 forming a work based on the Program, and copy and distribute such modifications
|
|
88 or work under the terms of Section 1 above, provided that you also meet all of
|
|
89 these conditions:
|
|
90
|
|
91 a) You must cause the modified files to carry prominent notices stating
|
|
92 that you changed the files and the date of any change.
|
|
93
|
|
94 b) You must cause any work that you distribute or publish, that in whole or
|
|
95 in part contains or is derived from the Program or any part thereof, to be
|
|
96 licensed as a whole at no charge to all third parties under the terms of
|
|
97 this License.
|
|
98
|
|
99 c) If the modified program normally reads commands interactively when run,
|
|
100 you must cause it, when started running for such interactive use in the
|
|
101 most ordinary way, to print or display an announcement including an
|
|
102 appropriate copyright notice and a notice that there is no warranty (or
|
|
103 else, saying that you provide a warranty) and that users may redistribute
|
|
104 the program under these conditions, and telling the user how to view a copy
|
|
105 of this License. (Exception: if the Program itself is interactive but does
|
|
106 not normally print such an announcement, your work based on the Program is
|
|
107 not required to print an announcement.)
|
|
108
|
|
109 These requirements apply to the modified work as a whole. If identifiable
|
|
110 sections of that work are not derived from the Program, and can be reasonably
|
|
111 considered independent and separate works in themselves, then this License, and
|
|
112 its terms, do not apply to those sections when you distribute them as separate
|
|
113 works. But when you distribute the same sections as part of a whole which is a
|
|
114 work based on the Program, the distribution of the whole must be on the terms
|
|
115 of this License, whose permissions for other licensees extend to the entire
|
|
116 whole, and thus to each and every part regardless of who wrote it.
|
|
117
|
|
118 Thus, it is not the intent of this section to claim rights or contest your
|
|
119 rights to work written entirely by you; rather, the intent is to exercise the
|
|
120 right to control the distribution of derivative or collective works based on
|
|
121 the Program.
|
|
122
|
|
123 In addition, mere aggregation of another work not based on the Program with the
|
|
124 Program (or with a work based on the Program) on a volume of a storage or
|
|
125 distribution medium does not bring the other work under the scope of this
|
|
126 License.
|
|
127
|
|
128 3. You may copy and distribute the Program (or a work based on it, under
|
|
129 Section 2) in object code or executable form under the terms of Sections 1 and
|
|
130 2 above provided that you also do one of the following:
|
|
131
|
|
132 a) Accompany it with the complete corresponding machine-readable source
|
|
133 code, which must be distributed under the terms of Sections 1 and 2 above
|
|
134 on a medium customarily used for software interchange; or,
|
|
135
|
|
136 b) Accompany it with a written offer, valid for at least three years, to
|
|
137 give any third party, for a charge no more than your cost of physically
|
|
138 performing source distribution, a complete machine-readable copy of the
|
|
139 corresponding source code, to be distributed under the terms of Sections 1
|
|
140 and 2 above on a medium customarily used for software interchange; or,
|
|
141
|
|
142 c) Accompany it with the information you received as to the offer to
|
|
143 distribute corresponding source code. (This alternative is allowed only
|
|
144 for noncommercial distribution and only if you received the program in
|
|
145 object code or executable form with such an offer, in accord with
|
|
146 Subsection b above.)
|
|
147
|
|
148 The source code for a work means the preferred form of the work for making
|
|
149 modifications to it. For an executable work, complete source code means all
|
|
150 the source code for all modules it contains, plus any associated interface
|
|
151 definition files, plus the scripts used to control compilation and installation
|
|
152 of the executable. However, as a special exception, the source code
|
|
153 distributed need not include anything that is normally distributed (in either
|
|
154 source or binary form) with the major components (compiler, kernel, and so on)
|
|
155 of the operating system on which the executable runs, unless that component
|
|
156 itself accompanies the executable.
|
|
157
|
|
158 If distribution of executable or object code is made by offering access to copy
|
|
159 from a designated place, then offering equivalent access to copy the source
|
|
160 code from the same place counts as distribution of the source code, even though
|
|
161 third parties are not compelled to copy the source along with the object code.
|
|
162
|
|
163 4. You may not copy, modify, sublicense, or distribute the Program except as
|
|
164 expressly provided under this License. Any attempt otherwise to copy, modify,
|
|
165 sublicense or distribute the Program is void, and will automatically terminate
|
|
166 your rights under this License. However, parties who have received copies, or
|
|
167 rights, from you under this License will not have their licenses terminated so
|
|
168 long as such parties remain in full compliance.
|
|
169
|
|
170 5. You are not required to accept this License, since you have not signed it.
|
|
171 However, nothing else grants you permission to modify or distribute the Program
|
|
172 or its derivative works. These actions are prohibited by law if you do not
|
|
173 accept this License. Therefore, by modifying or distributing the Program (or
|
|
174 any work based on the Program), you indicate your acceptance of this License to
|
|
175 do so, and all its terms and conditions for copying, distributing or modifying
|
|
176 the Program or works based on it.
|
|
177
|
|
178 6. Each time you redistribute the Program (or any work based on the Program),
|
|
179 the recipient automatically receives a license from the original licensor to
|
|
180 copy, distribute or modify the Program subject to these terms and conditions.
|
|
181 You may not impose any further restrictions on the recipients' exercise of the
|
|
182 rights granted herein. You are not responsible for enforcing compliance by
|
|
183 third parties to this License.
|
|
184
|
|
185 7. If, as a consequence of a court judgment or allegation of patent
|
|
186 infringement or for any other reason (not limited to patent issues), conditions
|
|
187 are imposed on you (whether by court order, agreement or otherwise) that
|
|
188 contradict the conditions of this License, they do not excuse you from the
|
|
189 conditions of this License. If you cannot distribute so as to satisfy
|
|
190 simultaneously your obligations under this License and any other pertinent
|
|
191 obligations, then as a consequence you may not distribute the Program at all.
|
|
192 For example, if a patent license would not permit royalty-free redistribution
|
|
193 of the Program by all those who receive copies directly or indirectly through
|
|
194 you, then the only way you could satisfy both it and this License would be to
|
|
195 refrain entirely from distribution of the Program.
|
|
196
|
|
197 If any portion of this section is held invalid or unenforceable under any
|
|
198 particular circumstance, the balance of the section is intended to apply and
|
|
199 the section as a whole is intended to apply in other circumstances.
|
|
200
|
|
201 It is not the purpose of this section to induce you to infringe any patents or
|
|
202 other property right claims or to contest validity of any such claims; this
|
|
203 section has the sole purpose of protecting the integrity of the free software
|
|
204 distribution system, which is implemented by public license practices. Many
|
|
205 people have made generous contributions to the wide range of software
|
|
206 distributed through that system in reliance on consistent application of that
|
|
207 system; it is up to the author/donor to decide if he or she is willing to
|
|
208 distribute software through any other system and a licensee cannot impose that
|
|
209 choice.
|
|
210
|
|
211 This section is intended to make thoroughly clear what is believed to be a
|
|
212 consequence of the rest of this License.
|
|
213
|
|
214 8. If the distribution and/or use of the Program is restricted in certain
|
|
215 countries either by patents or by copyrighted interfaces, the original
|
|
216 copyright holder who places the Program under this License may add an explicit
|
|
217 geographical distribution limitation excluding those countries, so that
|
|
218 distribution is permitted only in or among countries not thus excluded. In
|
|
219 such case, this License incorporates the limitation as if written in the body
|
|
220 of this License.
|
|
221
|
|
222 9. The Free Software Foundation may publish revised and/or new versions of the
|
|
223 General Public License from time to time. Such new versions will be similar in
|
|
224 spirit to the present version, but may differ in detail to address new problems
|
|
225 or concerns.
|
|
226
|
|
227 Each version is given a distinguishing version number. If the Program
|
|
228 specifies a version number of this License which applies to it and "any later
|
|
229 version", you have the option of following the terms and conditions either of
|
|
230 that version or of any later version published by the Free Software Foundation.
|
|
231 If the Program does not specify a version number of this License, you may
|
|
232 choose any version ever published by the Free Software Foundation.
|
|
233
|
|
234 10. If you wish to incorporate parts of the Program into other free programs
|
|
235 whose distribution conditions are different, write to the author to ask for
|
|
236 permission. For software which is copyrighted by the Free Software Foundation,
|
|
237 write to the Free Software Foundation; we sometimes make exceptions for this.
|
|
238 Our decision will be guided by the two goals of preserving the free status of
|
|
239 all derivatives of our free software and of promoting the sharing and reuse of
|
|
240 software generally.
|
|
241
|
|
242 NO WARRANTY
|
|
243
|
|
244 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR
|
|
245 THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE
|
|
246 STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE
|
|
247 PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
|
|
248 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
249 FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
|
|
250 PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE,
|
|
251 YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
|
252
|
|
253 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL
|
|
254 ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE
|
|
255 PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
|
256 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
|
|
257 INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA
|
|
258 BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
|
259 FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER
|
|
260 OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
|
|
261
|
|
262 END OF TERMS AND CONDITIONS
|
|
263
|
|
264 How to Apply These Terms to Your New Programs
|
|
265
|
|
266 If you develop a new program, and you want it to be of the greatest possible
|
|
267 use to the public, the best way to achieve this is to make it free software
|
|
268 which everyone can redistribute and change under these terms.
|
|
269
|
|
270 To do so, attach the following notices to the program. It is safest to attach
|
|
271 them to the start of each source file to most effectively convey the exclusion
|
|
272 of warranty; and each file should have at least the "copyright" line and a
|
|
273 pointer to where the full notice is found.
|
|
274
|
|
275 One line to give the program's name and a brief idea of what it does.
|
|
276
|
|
277 Copyright (C) <year> <name of author>
|
|
278
|
|
279 This program is free software; you can redistribute it and/or modify it
|
|
280 under the terms of the GNU General Public License as published by the Free
|
|
281 Software Foundation; either version 2 of the License, or (at your option)
|
|
282 any later version.
|
|
283
|
|
284 This program is distributed in the hope that it will be useful, but WITHOUT
|
|
285 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
286 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
287 more details.
|
|
288
|
|
289 You should have received a copy of the GNU General Public License along
|
|
290 with this program; if not, write to the Free Software Foundation, Inc.,
|
|
291 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
292
|
|
293 Also add information on how to contact you by electronic and paper mail.
|
|
294
|
|
295 If the program is interactive, make it output a short notice like this when it
|
|
296 starts in an interactive mode:
|
|
297
|
|
298 Gnomovision version 69, Copyright (C) year name of author Gnomovision comes
|
|
299 with ABSOLUTELY NO WARRANTY; for details type 'show w'. This is free
|
|
300 software, and you are welcome to redistribute it under certain conditions;
|
|
301 type 'show c' for details.
|
|
302
|
|
303 The hypothetical commands 'show w' and 'show c' should show the appropriate
|
|
304 parts of the General Public License. Of course, the commands you use may be
|
|
305 called something other than 'show w' and 'show c'; they could even be
|
|
306 mouse-clicks or menu items--whatever suits your program.
|
|
307
|
|
308 You should also get your employer (if you work as a programmer) or your school,
|
|
309 if any, to sign a "copyright disclaimer" for the program, if necessary. Here
|
|
310 is a sample; alter the names:
|
|
311
|
|
312 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
|
313 'Gnomovision' (which makes passes at compilers) written by James Hacker.
|
|
314
|
|
315 signature of Ty Coon, 1 April 1989
|
|
316
|
|
317 Ty Coon, President of Vice
|
|
318
|
|
319 This General Public License does not permit incorporating your program into
|
|
320 proprietary programs. If your program is a subroutine library, you may
|
|
321 consider it more useful to permit linking proprietary applications with the
|
|
322 library. If this is what you want to do, use the GNU Library General Public
|
|
323 License instead of this License.
|
|
324
|
|
325
|
|
326 "CLASSPATH" EXCEPTION TO THE GPL
|
|
327
|
|
328 Certain source files distributed by Oracle America and/or its affiliates are
|
|
329 subject to the following clarification and special exception to the GPL, but
|
|
330 only where Oracle has expressly included in the particular source file's header
|
|
331 the words "Oracle designates this particular file as subject to the "Classpath"
|
|
332 exception as provided by Oracle in the LICENSE file that accompanied this code."
|
|
333
|
|
334 Linking this library statically or dynamically with other modules is making
|
|
335 a combined work based on this library. Thus, the terms and conditions of
|
|
336 the GNU General Public License cover the whole combination.
|
|
337
|
|
338 As a special exception, the copyright holders of this library give you
|
|
339 permission to link this library with independent modules to produce an
|
|
340 executable, regardless of the license terms of these independent modules,
|
|
341 and to copy and distribute the resulting executable under terms of your
|
|
342 choice, provided that you also meet, for each linked independent module,
|
|
343 the terms and conditions of the license of that module. An independent
|
|
344 module is a module which is not derived from or based on this library. If
|
|
345 you modify this library, you may extend this exception to your version of
|
|
346 the library, but you are not obligated to do so. If you do not wish to do
|
|
347 so, delete this exception statement from your version.
|