1
2 GNU GENERAL PUBLIC LICENSE
3 Version 3, 29 June 2007
4
5 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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 GNU General Public License is a free, copyleft license for
12 software and other kinds of works.
13
14 The licenses for most software and other practical works are designed
15 to take away your freedom to share and change the works. By contrast,
16 the GNU General Public License is intended to guarantee your freedom to
17 share and change all versions of a program--to make sure it remains free
18 software for all its users. We, the Free Software Foundation, use the
19 GNU General Public License for most of our software; it applies also to
20 any other work released this way by its authors. You can apply it to
21 your programs, too.
22
23 When we speak of free software, we are referring to freedom, not
24 price. Our General Public Licenses are designed to make sure that you
25 have the freedom to distribute copies of free software (and charge for
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28 free programs, and that you know you can do these things.
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30 To protect your rights, we need to prevent others from denying you
31 these rights or asking you to surrender the rights. Therefore, you have
32 certain responsibilities if you distribute copies of the software, or if
33 you modify it: responsibilities to respect the freedom of others.
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35 For example, if you distribute copies of such a program, whether
36 gratis or for a fee, you must pass on to the recipients the same
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38 or can get the source code. And you must show them these terms so they
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41 Developers that use the GNU GPL protect your rights with two steps:
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45 For the developers' and authors' protection, the GPL clearly explains
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49 authors of previous versions.
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51 Some devices are designed to deny users access to install or run
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62 Finally, every program is threatened constantly by software patents.
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72 TERMS AND CONDITIONS
73
74 0. Definitions.
75
76 "This License" refers to version 3 of the GNU General Public License.
77
78 "Copyright" also means copyright-like laws that apply to other kinds of
79 works, such as semiconductor masks.
80
81 "The Program" refers to any copyrightable work licensed under this
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113 1. Source Code.
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115 The "source code" for a work means the preferred form of the work
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148 The Corresponding Source need not include anything that users
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150 Source.
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152 The Corresponding Source for a work in source code form is that
153 same work.
154
155 2. Basic Permissions.
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157 All rights granted under this License are granted for the term of
158 copyright on the Program, and are irrevocable provided the stated
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162 content, constitutes a covered work. This License acknowledges your
163 rights of fair use or other equivalent, as provided by copyright law.
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165 You may make, run and propagate covered works that you do not
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180 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
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182 No covered work shall be deemed part of an effective technological
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185 similar laws prohibiting or restricting circumvention of such
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188 When you convey a covered work, you waive any legal power to forbid
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196 4. Conveying Verbatim Copies.
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198 You may convey verbatim copies of the Program's source code as you
199 receive it, in any medium, provided that you conspicuously and
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201 keep intact all notices stating that this License and any
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203 keep intact all notices of the absence of any warranty; and give all
204 recipients a copy of this License along with the Program.
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206 You may charge any price or no price for each copy that you convey,
207 and you may offer support or warranty protection for a fee.
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209 5. Conveying Modified Source Versions.
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211 You may convey a work based on the Program, or the modifications to
212 produce it from the Program, in the form of source code under the
213 terms of section 4, provided that you also meet all of these conditions:
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215 a) The work must carry prominent notices stating that you modified
216 it, and giving a relevant date.
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218 b) The work must carry prominent notices stating that it is
219 released under this License and any conditions added under section
220 7. This requirement modifies the requirement in section 4 to
221 "keep intact all notices".
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223 c) You must license the entire work, as a whole, under this
224 License to anyone who comes into possession of a copy. This
225 License will therefore apply, along with any applicable section 7
226 additional terms, to the whole of the work, and all its parts,
227 regardless of how they are packaged. This License gives no
228 permission to license the work in any other way, but it does not
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231 d) If the work has interactive user interfaces, each must display
232 Appropriate Legal Notices; however, if the Program has interactive
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234 work need not make them do so.
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236 A compilation of a covered work with other separate and independent
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239 in or on a volume of a storage or distribution medium, is called an
240 "aggregate" if the compilation and its resulting copyright are not
241 used to limit the access or legal rights of the compilation's users
242 beyond what the individual works permit. Inclusion of a covered work
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244 parts of the aggregate.
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246 6. Conveying Non-Source Forms.
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248 You may convey a covered work in object code form under the terms
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253 a) Convey the object code in, or embodied in, a physical product
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255 Corresponding Source fixed on a durable physical medium
256 customarily used for software interchange.
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258 b) Convey the object code in, or embodied in, a physical product
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261 long as you offer spare parts or customer support for that product
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263 copy of the Corresponding Source for all the software in the
264 product that is covered by this License, on a durable physical
265 medium customarily used for software interchange, for a price no
266 more than your reasonable cost of physically performing this
267 conveying of source, or (2) access to copy the
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270 c) Convey individual copies of the object code with a copy of the
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274 with subsection 6b.
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276 d) Convey the object code by offering access from a designated
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289 e) Convey the object code using peer-to-peer transmission, provided
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291 Source of the work are being offered to the general public at no
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296 included in conveying the object code work.
297
298 A "User Product" is either (1) a "consumer product", which means any
299 tangible personal property which is normally used for personal, family,
300 or household purposes, or (2) anything designed or sold for incorporation
301 into a dwelling. In determining whether a product is a consumer product,
302 doubtful cases shall be resolved in favor of coverage. For a particular
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304 typical or common use of that class of product, regardless of the status
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308 commercial, industrial or non-consumer uses, unless such uses represent
309 the only significant mode of use of the product.
310
311 "Installation Information" for a User Product means any methods,
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314 a modified version of its Corresponding Source. The information must
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317 modification has been made.
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319 If you convey an object code work under this section in, or with, or
320 specifically for use in, a User Product, and the conveying occurs as
321 part of a transaction in which the right of possession and use of the
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324 Corresponding Source conveyed under this section must be accompanied
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326 if neither you nor any third party retains the ability to install
327 modified object code on the User Product (for example, the work has
328 been installed in ROM).
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330 The requirement to provide Installation Information does not include a
331 requirement to continue to provide support service, warranty, or updates
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333 the User Product in which it has been modified or installed. Access to a
334 network may be denied when the modification itself materially and
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338 Corresponding Source conveyed, and Installation Information provided,
339 in accord with this section must be in a format that is publicly
340 documented (and with an implementation available to the public in
341 source code form), and must require no special password or key for
342 unpacking, reading or copying.
343
344 7. Additional Terms.
345
346 "Additional permissions" are terms that supplement the terms of this
347 License by making exceptions from one or more of its conditions.
348 Additional permissions that are applicable to the entire Program shall
349 be treated as though they were included in this License, to the extent
350 that they are valid under applicable law. If additional permissions
351 apply only to part of the Program, that part may be used separately
352 under those permissions, but the entire Program remains governed by
353 this License without regard to the additional permissions.
354
355 When you convey a copy of a covered work, you may at your option
356 remove any additional permissions from that copy, or from any part of
357 it. (Additional permissions may be written to require their own
358 removal in certain cases when you modify the work.) You may place
359 additional permissions on material, added by you to a covered work,
360 for which you have or can give appropriate copyright permission.
361
362 Notwithstanding any other provision of this License, for material you
363 add to a covered work, you may (if authorized by the copyright holders of
364 that material) supplement the terms of this License with terms:
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366 a) Disclaiming warranty or limiting liability differently from the
367 terms of sections 15 and 16 of this License; or
368
369 b) Requiring preservation of specified reasonable legal notices or
370 author attributions in that material or in the Appropriate Legal
371 Notices displayed by works containing it; or
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373 c) Prohibiting misrepresentation of the origin of that material, or
374 requiring that modified versions of such material be marked in
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380 e) Declining to grant rights under trademark law for use of some
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382
383 f) Requiring indemnification of licensors and authors of that
384 material by anyone who conveys the material (or modified versions of
385 it) with contractual assumptions of liability to the recipient, for
386 any liability that these contractual assumptions directly impose on
387 those licensors and authors.
388
389 All other non-permissive additional terms are considered "further
390 restrictions" within the meaning of section 10. If the Program as you
391 received it, or any part of it, contains a notice stating that it is
392 governed by this License along with a term that is a further
393 restriction, you may remove that term. If a license document contains
394 a further restriction but permits relicensing or conveying under this
395 License, you may add to a covered work material governed by the terms
396 of that license document, provided that the further restriction does
397 not survive such relicensing or conveying.
398
399 If you add terms to a covered work in accord with this section, you
400 must place, in the relevant source files, a statement of the
401 additional terms that apply to those files, or a notice indicating
402 where to find the applicable terms.
403
404 Additional terms, permissive or non-permissive, may be stated in the
405 form of a separately written license, or stated as exceptions;
406 the above requirements apply either way.
407
408 8. Termination.
409
410 You may not propagate or modify a covered work except as expressly
411 provided under this License. Any attempt otherwise to propagate or
412 modify it is void, and will automatically terminate your rights under
413 this License (including any patent licenses granted under the third
414 paragraph of section 11).
415
416 However, if you cease all violation of this License, then your
417 license from a particular copyright holder is reinstated (a)
418 provisionally, unless and until the copyright holder explicitly and
419 finally terminates your license, and (b) permanently, if the copyright
420 holder fails to notify you of the violation by some reasonable means
421 prior to 60 days after the cessation.
422
423 Moreover, your license from a particular copyright holder is
424 reinstated permanently if the copyright holder notifies you of the
425 violation by some reasonable means, this is the first time you have
426 received notice of violation of this License (for any work) from that
427 copyright holder, and you cure the violation prior to 30 days after
428 your receipt of the notice.
429
430 Termination of your rights under this section does not terminate the
431 licenses of parties who have received copies or rights from you under
432 this License. If your rights have been terminated and not permanently
433 reinstated, you do not qualify to receive new licenses for the same
434 material under section 10.
435
436 9. Acceptance Not Required for Having Copies.
437
438 You are not required to accept this License in order to receive or
439 run a copy of the Program. Ancillary propagation of a covered work
440 occurring solely as a consequence of using peer-to-peer transmission
441 to receive a copy likewise does not require acceptance. However,
442 nothing other than this License grants you permission to propagate or
443 modify any covered work. These actions infringe copyright if you do
444 not accept this License. Therefore, by modifying or propagating a
445 covered work, you indicate your acceptance of this License to do so.
446
447 10. Automatic Licensing of Downstream Recipients.
448
449 Each time you convey a covered work, the recipient automatically
450 receives a license from the original licensors, to run, modify and
451 propagate that work, subject to this License. You are not responsible
452 for enforcing compliance by third parties with this License.
453
454 An "entity transaction" is a transaction transferring control of an
455 organization, or substantially all assets of one, or subdividing an
456 organization, or merging organizations. If propagation of a covered
457 work results from an entity transaction, each party to that
458 transaction who receives a copy of the work also receives whatever
459 licenses to the work the party's predecessor in interest had or could
460 give under the previous paragraph, plus a right to possession of the
461 Corresponding Source of the work from the predecessor in interest, if
462 the predecessor has it or can get it with reasonable efforts.
463
464 You may not impose any further restrictions on the exercise of the
465 rights granted or affirmed under this License. For example, you may
466 not impose a license fee, royalty, or other charge for exercise of
467 rights granted under this License, and you may not initiate litigation
468 (including a cross-claim or counterclaim in a lawsuit) alleging that
469 any patent claim is infringed by making, using, selling, offering for
470 sale, or importing the Program or any portion of it.
471
472 11. Patents.
473
474 A "contributor" is a copyright holder who authorizes use under this
475 License of the Program or a work on which the Program is based. The
476 work thus licensed is called the contributor's "contributor version".
477
478 A contributor's "essential patent claims" are all patent claims
479 owned or controlled by the contributor, whether already acquired or
480 hereafter acquired, that would be infringed by some manner, permitted
481 by this License, of making, using, or selling its contributor version,
482 but do not include claims that would be infringed only as a
483 consequence of further modification of the contributor version. For
484 purposes of this definition, "control" includes the right to grant
485 patent sublicenses in a manner consistent with the requirements of
486 this License.
487
488 Each contributor grants you a non-exclusive, worldwide, royalty-free
489 patent license under the contributor's essential patent claims, to
490 make, use, sell, offer for sale, import and otherwise run, modify and
491 propagate the contents of its contributor version.
492
493 In the following three paragraphs, a "patent license" is any express
494 agreement or commitment, however denominated, not to enforce a patent
495 (such as an express permission to practice a patent or covenant not to
496 sue for patent infringement). To "grant" such a patent license to a
497 party means to make such an agreement or commitment not to enforce a
498 patent against the party.
499
500 If you convey a covered work, knowingly relying on a patent license,
501 and the Corresponding Source of the work is not available for anyone
502 to copy, free of charge and under the terms of this License, through a
503 publicly available network server or other readily accessible means,
504 then you must either (1) cause the Corresponding Source to be so
505 available, or (2) arrange to deprive yourself of the benefit of the
506 patent license for this particular work, or (3) arrange, in a manner
507 consistent with the requirements of this License, to extend the patent
508 license to downstream recipients. "Knowingly relying" means you have
509 actual knowledge that, but for the patent license, your conveying the
510 covered work in a country, or your recipient's use of the covered work
511 in a country, would infringe one or more identifiable patents in that
512 country that you have reason to believe are valid.
513
514 If, pursuant to or in connection with a single transaction or
515 arrangement, you convey, or propagate by procuring conveyance of, a
516 covered work, and grant a patent license to some of the parties
517 receiving the covered work authorizing them to use, propagate, modify
518 or convey a specific copy of the covered work, then the patent license
519 you grant is automatically extended to all recipients of the covered
520 work and works based on it.
521
522 A patent license is "discriminatory" if it does not include within
523 the scope of its coverage, prohibits the exercise of, or is
524 conditioned on the non-exercise of one or more of the rights that are
525 specifically granted under this License. You may not convey a covered
526 work if you are a party to an arrangement with a third party that is
527 in the business of distributing software, under which you make payment
528 to the third party based on the extent of your activity of conveying
529 the work, and under which the third party grants, to any of the
530 parties who would receive the covered work from you, a discriminatory
531 patent license (a) in connection with copies of the covered work
532 conveyed by you (or copies made from those copies), or (b) primarily
533 for and in connection with specific products or compilations that
534 contain the covered work, unless you entered into that arrangement,
535 or that patent license was granted, prior to 28 March 2007.
536
537 Nothing in this License shall be construed as excluding or limiting
538 any implied license or other defenses to infringement that may
539 otherwise be available to you under applicable patent law.
540
541 12. No Surrender of Others' Freedom.
542
543 If conditions are imposed on you (whether by court order, agreement or
544 otherwise) that contradict the conditions of this License, they do not
545 excuse you from the conditions of this License. If you cannot convey a
546 covered work so as to satisfy simultaneously your obligations under this
547 License and any other pertinent obligations, then as a consequence you may
548 not convey it at all. For example, if you agree to terms that obligate you
549 to collect a royalty for further conveying from those to whom you convey
550 the Program, the only way you could satisfy both those terms and this
551 License would be to refrain entirely from conveying the Program.
552
553 13. Use with the GNU Affero General Public License.
554
555 Notwithstanding any other provision of this License, you have
556 permission to link or combine any covered work with a work licensed
557 under version 3 of the GNU Affero General Public License into a single
558 combined work, and to convey the resulting work. The terms of this
559 License will continue to apply to the part which is the covered work,
560 but the special requirements of the GNU Affero General Public License,
561 section 13, concerning interaction through a network will apply to the
562 combination as such.
563
564 14. Revised Versions of this License.
565
566 The Free Software Foundation may publish revised and/or new versions of
567 the GNU General Public License from time to time. Such new versions will
568 be similar in spirit to the present version, but may differ in detail to
569 address new problems or concerns.
570
571 Each version is given a distinguishing version number. If the
572 Program specifies that a certain numbered version of the GNU General
573 Public License "or any later version" applies to it, you have the
574 option of following the terms and conditions either of that numbered
575 version or of any later version published by the Free Software
576 Foundation. If the Program does not specify a version number of the
577 GNU General Public License, you may choose any version ever published
578 by the Free Software Foundation.
579
580 If the Program specifies that a proxy can decide which future
581 versions of the GNU General Public License can be used, that proxy's
582 public statement of acceptance of a version permanently authorizes you
583 to choose that version for the Program.
584
585 Later license versions may give you additional or different
586 permissions. However, no additional obligations are imposed on any
587 author or copyright holder as a result of your choosing to follow a
588 later version.
589
590 15. Disclaimer of Warranty.
591
592 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
593 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
594 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
595 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
596 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
597 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
598 IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
599 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
600
601 16. Limitation of Liability.
602
603 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
604 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
605 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
606 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
607 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
608 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
609 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
610 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
611 SUCH DAMAGES.
612
613 17. Interpretation of Sections 15 and 16.
614
615 If the disclaimer of warranty and limitation of liability provided
616 above cannot be given local legal effect according to their terms,
617 reviewing courts shall apply local law that most closely approximates
618 an absolute waiver of all civil liability in connection with the
619 Program, unless a warranty or assumption of liability accompanies a
620 copy of the Program in return for a fee.
621
622 END OF TERMS AND CONDITIONS
623
624 How to Apply These Terms to Your New Programs
625
626 If you develop a new program, and you want it to be of the greatest
627 possible use to the public, the best way to achieve this is to make it
628 free software which everyone can redistribute and change under these terms.
629
630 To do so, attach the following notices to the program. It is safest
631 to attach them to the start of each source file to most effectively
632 state the exclusion of warranty; and each file should have at least
633 the "copyright" line and a pointer to where the full notice is found.
634
635 <one line to give the program's name and a brief idea of what it does.>
636 Copyright (C) <year> <name of author>
637
638 This program is free software: you can redistribute it and/or modify
639 it under the terms of the GNU General Public License as published by
640 the Free Software Foundation, either version 3 of the License, or
641 (at your option) any later version.
642
643 This program is distributed in the hope that it will be useful,
644 but WITHOUT ANY WARRANTY; without even the implied warranty of
645 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
646 GNU General Public License for more details.
647
648 You should have received a copy of the GNU General Public License
649 along with this program. If not, see <http://www.gnu.org/licenses/>.
650
651 Also add information on how to contact you by electronic and paper mail.
652
653 If the program does terminal interaction, make it output a short
654 notice like this when it starts in an interactive mode:
655
656 <program> Copyright (C) <year> <name of author>
657 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
658 This is free software, and you are welcome to redistribute it
659 under certain conditions; type `show c' for details.
660
661 The hypothetical commands `show w' and `show c' should show the appropriate
662 parts of the General Public License. Of course, your program's commands
663 might be different; for a GUI interface, you would use an "about box".
664
665 You should also get your employer (if you work as a programmer) or school,
666 if any, to sign a "copyright disclaimer" for the program, if necessary.
667 For more information on this, and how to apply and follow the GNU GPL, see
668 <http://www.gnu.org/licenses/>.
669
670 The GNU General Public License does not permit incorporating your program
671 into proprietary programs. If your program is a subroutine library, you
672 may consider it more useful to permit linking proprietary applications with
673 the library. If this is what you want to do, use the GNU Lesser General
674 Public License instead of this License. But first, please read
675 <http://www.gnu.org/philosophy/why-not-lgpl.html>.
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