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1 | |
2 | =head1 NAME | |
3 | ||
4350c9a7 | 4 | perlgpl - the GNU General Public License, version 2 |
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5 | |
6 | =head1 SYNOPSIS | |
7 | ||
8 | You can refer to this document in Pod via "L<perlgpl>" | |
9 | Or you can see this document by entering "perldoc perlgpl" | |
10 | ||
11 | =cut | |
12 | ||
13 | # Because the following document's language disallows "changing" | |
14 | # it, we haven't gone thru and prettied it up with =item's or | |
15 | # anything. It's good enough the way it is. | |
16 | ||
17 | =head1 DESCRIPTION | |
18 | ||
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19 | This is B<"The GNU General Public License, version 2">. It's here so |
20 | that modules, programs, etc., that want to declare this as their | |
21 | distribution license, can link to it. | |
22 | ||
23 | It is also one of the two licenses Perl allows itself to be | |
24 | redistributed and/or modified; for the other one, the Perl Artistic | |
25 | License, see the L<perlartistic>. | |
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26 | |
27 | =head1 GNU GENERAL PUBLIC LICENSE | |
28 | ||
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29 | GNU GENERAL PUBLIC LICENSE |
30 | Version 2, June 1991 | |
31 | ||
32 | Copyright (C) 1989, 1991 Free Software Foundation, Inc. | |
8d9043d1 | 33 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
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34 | Everyone is permitted to copy and distribute verbatim copies |
35 | of this license document, but changing it is not allowed. | |
36 | ||
37 | Preamble | |
38 | ||
8d9043d1 | 39 | The licenses for most software are designed to take away your |
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40 | freedom to share and change it. By contrast, the GNU General Public |
41 | License is intended to guarantee your freedom to share and change free | |
42 | software--to make sure the software is free for all its users. This | |
43 | General Public License applies to most of the Free Software | |
44 | Foundation's software and to any other program whose authors commit to | |
45 | using it. (Some other Free Software Foundation software is covered by | |
46 | the GNU Library General Public License instead.) You can apply it to | |
47 | your programs, too. | |
48 | ||
8d9043d1 | 49 | When we speak of free software, we are referring to freedom, not |
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50 | price. Our General Public Licenses are designed to make sure that you |
51 | have the freedom to distribute copies of free software (and charge for | |
52 | this service if you wish), that you receive source code or can get it | |
53 | if you want it, that you can change the software or use pieces of it | |
54 | in new free programs; and that you know you can do these things. | |
55 | ||
8d9043d1 | 56 | To protect your rights, we need to make restrictions that forbid |
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57 | anyone to deny you these rights or to ask you to surrender the rights. |
58 | These restrictions translate to certain responsibilities for you if you | |
59 | distribute copies of the software, or if you modify it. | |
60 | ||
8d9043d1 | 61 | For example, if you distribute copies of such a program, whether |
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62 | gratis or for a fee, you must give the recipients all the rights that |
63 | you have. You must make sure that they, too, receive or can get the | |
64 | source code. And you must show them these terms so they know their | |
65 | rights. | |
66 | ||
8d9043d1 | 67 | We protect your rights with two steps: (1) copyright the software, and |
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68 | (2) offer you this license which gives you legal permission to copy, |
69 | distribute and/or modify the software. | |
70 | ||
8d9043d1 | 71 | Also, for each author's protection and ours, we want to make certain |
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72 | that everyone understands that there is no warranty for this free |
73 | software. If the software is modified by someone else and passed on, we | |
74 | want its recipients to know that what they have is not the original, so | |
75 | that any problems introduced by others will not reflect on the original | |
76 | authors' reputations. | |
77 | ||
8d9043d1 | 78 | Finally, any free program is threatened constantly by software |
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79 | patents. We wish to avoid the danger that redistributors of a free |
80 | program will individually obtain patent licenses, in effect making the | |
81 | program proprietary. To prevent this, we have made it clear that any | |
82 | patent must be licensed for everyone's free use or not licensed at all. | |
83 | ||
8d9043d1 | 84 | The precise terms and conditions for copying, distribution and |
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85 | modification follow. |
86 | ||
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87 | GNU GENERAL PUBLIC LICENSE |
88 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
89 | ||
8d9043d1 | 90 | 0. This License applies to any program or other work which contains |
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91 | a notice placed by the copyright holder saying it may be distributed |
92 | under the terms of this General Public License. The "Program", below, | |
93 | refers to any such program or work, and a "work based on the Program" | |
94 | means either the Program or any derivative work under copyright law: | |
95 | that is to say, a work containing the Program or a portion of it, | |
96 | either verbatim or with modifications and/or translated into another | |
97 | language. (Hereinafter, translation is included without limitation in | |
98 | the term "modification".) Each licensee is addressed as "you". | |
99 | ||
100 | Activities other than copying, distribution and modification are not | |
101 | covered by this License; they are outside its scope. The act of | |
102 | running the Program is not restricted, and the output from the Program | |
103 | is covered only if its contents constitute a work based on the | |
104 | Program (independent of having been made by running the Program). | |
105 | Whether that is true depends on what the Program does. | |
106 | ||
8d9043d1 | 107 | 1. You may copy and distribute verbatim copies of the Program's |
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108 | source code as you receive it, in any medium, provided that you |
109 | conspicuously and appropriately publish on each copy an appropriate | |
110 | copyright notice and disclaimer of warranty; keep intact all the | |
111 | notices that refer to this License and to the absence of any warranty; | |
112 | and give any other recipients of the Program a copy of this License | |
113 | along with the Program. | |
114 | ||
115 | You may charge a fee for the physical act of transferring a copy, and | |
116 | you may at your option offer warranty protection in exchange for a fee. | |
117 | ||
8d9043d1 | 118 | 2. You may modify your copy or copies of the Program or any portion |
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119 | of it, thus forming a work based on the Program, and copy and |
120 | distribute such modifications or work under the terms of Section 1 | |
121 | above, provided that you also meet all of these conditions: | |
122 | ||
123 | a) You must cause the modified files to carry prominent notices | |
124 | stating that you changed the files and the date of any change. | |
125 | ||
126 | b) You must cause any work that you distribute or publish, that in | |
127 | whole or in part contains or is derived from the Program or any | |
128 | part thereof, to be licensed as a whole at no charge to all third | |
129 | parties under the terms of this License. | |
130 | ||
131 | c) If the modified program normally reads commands interactively | |
132 | when run, you must cause it, when started running for such | |
133 | interactive use in the most ordinary way, to print or display an | |
134 | announcement including an appropriate copyright notice and a | |
135 | notice that there is no warranty (or else, saying that you provide | |
136 | a warranty) and that users may redistribute the program under | |
137 | these conditions, and telling the user how to view a copy of this | |
138 | License. (Exception: if the Program itself is interactive but | |
139 | does not normally print such an announcement, your work based on | |
140 | the Program is not required to print an announcement.) | |
141 | ||
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142 | These requirements apply to the modified work as a whole. If |
143 | identifiable sections of that work are not derived from the Program, | |
144 | and can be reasonably considered independent and separate works in | |
145 | themselves, then this License, and its terms, do not apply to those | |
146 | sections when you distribute them as separate works. But when you | |
147 | distribute the same sections as part of a whole which is a work based | |
148 | on the Program, the distribution of the whole must be on the terms of | |
149 | this License, whose permissions for other licensees extend to the | |
150 | entire whole, and thus to each and every part regardless of who wrote it. | |
151 | ||
152 | Thus, it is not the intent of this section to claim rights or contest | |
153 | your rights to work written entirely by you; rather, the intent is to | |
154 | exercise the right to control the distribution of derivative or | |
155 | collective works based on the Program. | |
156 | ||
157 | In addition, mere aggregation of another work not based on the Program | |
158 | with the Program (or with a work based on the Program) on a volume of | |
159 | a storage or distribution medium does not bring the other work under | |
160 | the scope of this License. | |
161 | ||
8d9043d1 | 162 | 3. You may copy and distribute the Program (or a work based on it, |
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163 | under Section 2) in object code or executable form under the terms of |
164 | Sections 1 and 2 above provided that you also do one of the following: | |
165 | ||
166 | a) Accompany it with the complete corresponding machine-readable | |
167 | source code, which must be distributed under the terms of Sections | |
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168 | 1 and 2 above on a medium customarily used for software |
169 | interchange; or, | |
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170 | |
171 | b) Accompany it with a written offer, valid for at least three | |
172 | years, to give any third party, for a charge no more than your | |
173 | cost of physically performing source distribution, a complete | |
174 | machine-readable copy of the corresponding source code, to be | |
175 | distributed under the terms of Sections 1 and 2 above on a medium | |
176 | customarily used for software interchange; or, | |
177 | ||
178 | c) Accompany it with the information you received as to the offer | |
179 | to distribute corresponding source code. (This alternative is | |
180 | allowed only for noncommercial distribution and only if you | |
181 | received the program in object code or executable form with such | |
182 | an offer, in accord with Subsection b above.) | |
183 | ||
184 | The source code for a work means the preferred form of the work for | |
185 | making modifications to it. For an executable work, complete source | |
186 | code means all the source code for all modules it contains, plus any | |
187 | associated interface definition files, plus the scripts used to | |
188 | control compilation and installation of the executable. However, as a | |
189 | special exception, the source code distributed need not include | |
190 | anything that is normally distributed (in either source or binary | |
191 | form) with the major components (compiler, kernel, and so on) of the | |
192 | operating system on which the executable runs, unless that component | |
193 | itself accompanies the executable. | |
194 | ||
195 | If distribution of executable or object code is made by offering | |
196 | access to copy from a designated place, then offering equivalent | |
197 | access to copy the source code from the same place counts as | |
198 | distribution of the source code, even though third parties are not | |
199 | compelled to copy the source along with the object code. | |
200 | ||
8d9043d1 | 201 | 4. You may not copy, modify, sublicense, or distribute the Program |
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202 | except as expressly provided under this License. Any attempt |
203 | otherwise to copy, modify, sublicense or distribute the Program is | |
204 | void, and will automatically terminate your rights under this License. | |
205 | However, parties who have received copies, or rights, from you under | |
206 | this License will not have their licenses terminated so long as such | |
207 | parties remain in full compliance. | |
208 | ||
8d9043d1 | 209 | 5. You are not required to accept this License, since you have not |
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210 | signed it. However, nothing else grants you permission to modify or |
211 | distribute the Program or its derivative works. These actions are | |
212 | prohibited by law if you do not accept this License. Therefore, by | |
213 | modifying or distributing the Program (or any work based on the | |
214 | Program), you indicate your acceptance of this License to do so, and | |
215 | all its terms and conditions for copying, distributing or modifying | |
216 | the Program or works based on it. | |
217 | ||
8d9043d1 | 218 | 6. Each time you redistribute the Program (or any work based on the |
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219 | Program), the recipient automatically receives a license from the |
220 | original licensor to copy, distribute or modify the Program subject to | |
221 | these terms and conditions. You may not impose any further | |
222 | restrictions on the recipients' exercise of the rights granted herein. | |
223 | You are not responsible for enforcing compliance by third parties to | |
224 | this License. | |
225 | ||
8d9043d1 | 226 | 7. If, as a consequence of a court judgment or allegation of patent |
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227 | infringement or for any other reason (not limited to patent issues), |
228 | conditions are imposed on you (whether by court order, agreement or | |
229 | otherwise) that contradict the conditions of this License, they do not | |
230 | excuse you from the conditions of this License. If you cannot | |
231 | distribute so as to satisfy simultaneously your obligations under this | |
232 | License and any other pertinent obligations, then as a consequence you | |
233 | may not distribute the Program at all. For example, if a patent | |
234 | license would not permit royalty-free redistribution of the Program by | |
235 | all those who receive copies directly or indirectly through you, then | |
236 | the only way you could satisfy both it and this License would be to | |
237 | refrain entirely from distribution of the Program. | |
238 | ||
239 | If any portion of this section is held invalid or unenforceable under | |
240 | any particular circumstance, the balance of the section is intended to | |
241 | apply and the section as a whole is intended to apply in other | |
242 | circumstances. | |
243 | ||
244 | It is not the purpose of this section to induce you to infringe any | |
245 | patents or other property right claims or to contest validity of any | |
246 | such claims; this section has the sole purpose of protecting the | |
247 | integrity of the free software distribution system, which is | |
248 | implemented by public license practices. Many people have made | |
249 | generous contributions to the wide range of software distributed | |
250 | through that system in reliance on consistent application of that | |
251 | system; it is up to the author/donor to decide if he or she is willing | |
252 | to distribute software through any other system and a licensee cannot | |
253 | impose that choice. | |
254 | ||
255 | This section is intended to make thoroughly clear what is believed to | |
256 | be a consequence of the rest of this License. | |
257 | ||
8d9043d1 | 258 | 8. If the distribution and/or use of the Program is restricted in |
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259 | certain countries either by patents or by copyrighted interfaces, the |
260 | original copyright holder who places the Program under this License | |
261 | may add an explicit geographical distribution limitation excluding | |
262 | those countries, so that distribution is permitted only in or among | |
263 | countries not thus excluded. In such case, this License incorporates | |
264 | the limitation as if written in the body of this License. | |
265 | ||
8d9043d1 | 266 | 9. The Free Software Foundation may publish revised and/or new versions |
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267 | of the General Public License from time to time. Such new versions will |
268 | be similar in spirit to the present version, but may differ in detail to | |
269 | address new problems or concerns. | |
270 | ||
271 | Each version is given a distinguishing version number. If the Program | |
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272 | specifies a version number of this License which applies to it and |
273 | "any later version", you have the option of following the terms and | |
274 | conditions either of that version or of any later version published by | |
275 | the Free Software Foundation. If the Program does not specify a | |
276 | version number of this License, you may choose any version ever | |
277 | published by the Free Software Foundation. | |
278 | ||
279 | 10. If you wish to incorporate parts of the Program into other free | |
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280 | programs whose distribution conditions are different, write to the author |
281 | to ask for permission. For software which is copyrighted by the Free | |
282 | Software Foundation, write to the Free Software Foundation; we sometimes | |
283 | make exceptions for this. Our decision will be guided by the two goals | |
284 | of preserving the free status of all derivatives of our free software and | |
285 | of promoting the sharing and reuse of software generally. | |
286 | ||
287 | NO WARRANTY | |
288 | ||
8d9043d1 NC |
289 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO |
290 | WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. | |
291 | EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR | |
292 | OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY | |
293 | KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE | |
294 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
295 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE | |
296 | PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME | |
297 | THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. | |
298 | ||
299 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN | |
300 | WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY | |
301 | AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU | |
302 | FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR | |
303 | CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE | |
304 | PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING | |
305 | RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A | |
306 | FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF | |
307 | SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
308 | DAMAGES. | |
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309 | |
310 | END OF TERMS AND CONDITIONS | |
311 | ||
8d9043d1 | 312 | How to Apply These Terms to Your New Programs |
cc2b665f | 313 | |
8d9043d1 | 314 | If you develop a new program, and you want it to be of the greatest |
cc2b665f | 315 | possible use to the public, the best way to achieve this is to make it |
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316 | free software which everyone can redistribute and change under these |
317 | terms. | |
cc2b665f | 318 | |
8d9043d1 | 319 | To do so, attach the following notices to the program. It is safest |
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320 | to attach them to the start of each source file to most effectively |
321 | convey the exclusion of warranty; and each file should have at least | |
322 | the "copyright" line and a pointer to where the full notice is found. | |
323 | ||
324 | <one line to give the program's name and a brief idea of what it does.> | |
8d9043d1 | 325 | Copyright (C) <year> <name of author> |
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326 | |
327 | This program is free software; you can redistribute it and/or modify | |
328 | it under the terms of the GNU General Public License as published by | |
329 | the Free Software Foundation; either version 2 of the License, or | |
330 | (at your option) any later version. | |
331 | ||
332 | This program is distributed in the hope that it will be useful, | |
333 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
334 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
335 | GNU General Public License for more details. | |
336 | ||
337 | You should have received a copy of the GNU General Public License | |
338 | along with this program; if not, write to the Free Software | |
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339 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA |
340 | ||
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341 | |
342 | Also add information on how to contact you by electronic and paper mail. | |
343 | ||
344 | If the program is interactive, make it output a short notice like this | |
345 | when it starts in an interactive mode: | |
346 | ||
8d9043d1 NC |
347 | Gnomovision version 69, Copyright (C) year name of author |
348 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | |
cc2b665f | 349 | This is free software, and you are welcome to redistribute it |
8d9043d1 | 350 | under certain conditions; type `show c' for details. |
cc2b665f | 351 | |
8d9043d1 | 352 | The hypothetical commands `show w' and `show c' should show the appropriate |
cc2b665f | 353 | parts of the General Public License. Of course, the commands you use may |
8d9043d1 | 354 | be called something other than `show w' and `show c'; they could even be |
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355 | mouse-clicks or menu items--whatever suits your program. |
356 | ||
357 | You should also get your employer (if you work as a programmer) or your | |
358 | school, if any, to sign a "copyright disclaimer" for the program, if | |
359 | necessary. Here is a sample; alter the names: | |
360 | ||
361 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program | |
8d9043d1 | 362 | `Gnomovision' (which makes passes at compilers) written by James Hacker. |
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363 | |
364 | <signature of Ty Coon>, 1 April 1989 | |
365 | Ty Coon, President of Vice | |
366 | ||
367 | This General Public License does not permit incorporating your program into | |
368 | proprietary programs. If your program is a subroutine library, you may | |
369 | consider it more useful to permit linking proprietary applications with the | |
370 | library. If this is what you want to do, use the GNU Library General | |
371 | Public License instead of this License. | |
372 | ||
8d9043d1 | 373 | |
cc2b665f | 374 | [End.] |
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375 | |
376 | =cut | |
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377 | |
378 |