1 GNU GENERAL PUBLIC LICENSE
2 Version 3, 29 June 2007
4 Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
5 Everyone is permitted to copy and distribute verbatim copies
6 of this license document, but changing it is not allowed.
10 The GNU General Public License is a free, copyleft license for
11software and other kinds of works.
13 The licenses for most software and other practical works are designed
14to take away your freedom to share and change the works. By contrast,
15the GNU General Public License is intended to guarantee your freedom to
16share and change all versions of a program--to make sure it remains free
17software for all its users. We, the Free Software Foundation, use the
18GNU General Public License for most of our software; it applies also to
19any other work released this way by its authors. You can apply it to
20your programs, too.
22 When we speak of free software, we are referring to freedom, not
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32you modify it: responsibilities to respect the freedom of others.
34 For example, if you distribute copies of such a program, whether
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40 Developers that use the GNU GPL protect your rights with two steps:
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48authors of previous versions.
50 Some devices are designed to deny users access to install or run
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61 Finally, every program is threatened constantly by software patents.
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68 The precise terms and conditions for copying, distribution and
71 TERMS AND CONDITIONS
73 0. Definitions.
75 "This License" refers to version 3 of the GNU General Public License.
77 "Copyright" also means copyright-like laws that apply to other kinds of
78works, such as semiconductor masks.
80 "The Program" refers to any copyrightable work licensed under this
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82"recipients" may be individuals or organizations.
84 To "modify" a work means to copy from or adapt all or part of the work
85in a fashion requiring copyright permission, other than the making of an
86exact copy. The resulting work is called a "modified version" of the
87earlier work or a work "based on" the earlier work.
89 A "covered work" means either the unmodified Program or a work based
90on the Program.
92 To "propagate" a work means to do anything with it that, without
93permission, would make you directly or secondarily liable for
94infringement under applicable copyright law, except executing it on a
95computer or modifying a private copy. Propagation includes copying,
96distribution (with or without modification), making available to the
97public, and in some countries other activities as well.
99 To "convey" a work means any kind of propagation that enables other
100parties to make or receive copies. Mere interaction with a user through
101a computer network, with no transfer of a copy, is not conveying.
103 An interactive user interface displays "Appropriate Legal Notices"
104to the extent that it includes a convenient and prominently visible
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110menu, a prominent item in the list meets this criterion.
112 1. Source Code.
114 The "source code" for a work means the preferred form of the work
115for making modifications to it. "Object code" means any non-source
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118 A "Standard Interface" means an interface that either is an official
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121is widely used among developers working in that language.
123 The "System Libraries" of an executable work include anything, other
124than the work as a whole, that (a) is included in the normal form of
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134 The "Corresponding Source" for a work in object code form means all
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145subprograms and other parts of the work.
147 The Corresponding Source need not include anything that users
148can regenerate automatically from other parts of the Corresponding
151 The Corresponding Source for a work in source code form is that
154 2. Basic Permissions.
156 All rights granted under this License are granted for the term of
157copyright on the Program, and are irrevocable provided the stated
158conditions are met. This License explicitly affirms your unlimited
159permission to run the unmodified Program. The output from running a
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161content, constitutes a covered work. This License acknowledges your
162rights of fair use or other equivalent, as provided by copyright law.
164 You may make, run and propagate covered works that you do not
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175 Conveying under any other circumstances is permitted solely under
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177makes it unnecessary.
179 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
181 No covered work shall be deemed part of an effective technological
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184similar laws prohibiting or restricting circumvention of such
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195 4. Conveying Verbatim Copies.
197 You may convey verbatim copies of the Program's source code as you
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200keep intact all notices stating that this License and any
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202keep intact all notices of the absence of any warranty; and give all
203recipients a copy of this License along with the Program.
205 You may charge any price or no price for each copy that you convey,
206and you may offer support or warranty protection for a fee.
208 5. Conveying Modified Source Versions.
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211produce it from the Program, in the form of source code under the
212terms of section 4, provided that you also meet all of these conditions:
214 a) The work must carry prominent notices stating that you modified
215 it, and giving a relevant date.
217 b) The work must carry prominent notices stating that it is
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222 c) You must license the entire work, as a whole, under this
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224 License will therefore apply, along with any applicable section 7
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226 regardless of how they are packaged. This License gives no
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230 d) If the work has interactive user interfaces, each must display
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233 work need not make them do so.
235 A compilation of a covered work with other separate and independent
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243parts of the aggregate.
245 6. Conveying Non-Source Forms.
247 You may convey a covered work in object code form under the terms
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255 customarily used for software interchange.
257 b) Convey the object code in, or embodied in, a physical product
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259 written offer, valid for at least three years and valid for as
260 long as you offer spare parts or customer support for that product
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262 copy of the Corresponding Source for all the software in the
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266 conveying of source, or (2) access to copy the
267 Corresponding Source from a network server at no charge.
269 c) Convey individual copies of the object code with a copy of the
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271 alternative is allowed only occasionally and noncommercially, and
272 only if you received the object code with such an offer, in accord
273 with subsection 6b.
275 d) Convey the object code by offering access from a designated
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277 Corresponding Source in the same way through the same place at no
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280 copy the object code is a network server, the Corresponding Source
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282 that supports equivalent copying facilities, provided you maintain
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286 available for as long as needed to satisfy these requirements.
288 e) Convey the object code using peer-to-peer transmission, provided
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290 Source of the work are being offered to the general public at no
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293 A separable portion of the object code, whose source code is excluded
294from the Corresponding Source as a System Library, need not be
295included in conveying the object code work.
297 A "User Product" is either (1) a "consumer product", which means any
298tangible personal property which is normally used for personal, family,
299or household purposes, or (2) anything designed or sold for incorporation
300into a dwelling. In determining whether a product is a consumer product,
301doubtful cases shall be resolved in favor of coverage. For a particular
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304of the particular user or of the way in which the particular user
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307commercial, industrial or non-consumer uses, unless such uses represent
308the only significant mode of use of the product.
310 "Installation Information" for a User Product means any methods,
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313a modified version of its Corresponding Source. The information must
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315code is in no case prevented or interfered with solely because
316modification has been made.
318 If you convey an object code work under this section in, or with, or
319specifically for use in, a User Product, and the conveying occurs as
320part of a transaction in which the right of possession and use of the
321User Product is transferred to the recipient in perpetuity or for a
322fixed term (regardless of how the transaction is characterized), the
323Corresponding Source conveyed under this section must be accompanied
324by the Installation Information. But this requirement does not apply
325if neither you nor any third party retains the ability to install
326modified object code on the User Product (for example, the work has
327been installed in ROM).
329 The requirement to provide Installation Information does not include a
330requirement to continue to provide support service, warranty, or updates
331for a work that has been modified or installed by the recipient, or for
332the User Product in which it has been modified or installed. Access to a
333network may be denied when the modification itself materially and
334adversely affects the operation of the network or violates the rules and
335protocols for communication across the network.
337 Corresponding Source conveyed, and Installation Information provided,
338in accord with this section must be in a format that is publicly
339documented (and with an implementation available to the public in
340source code form), and must require no special password or key for
341unpacking, reading or copying.
343 7. Additional Terms.
345 "Additional permissions" are terms that supplement the terms of this
346License by making exceptions from one or more of its conditions.
347Additional permissions that are applicable to the entire Program shall
348be treated as though they were included in this License, to the extent
349that they are valid under applicable law. If additional permissions
350apply only to part of the Program, that part may be used separately
351under those permissions, but the entire Program remains governed by
352this License without regard to the additional permissions.
354 When you convey a copy of a covered work, you may at your option
355remove any additional permissions from that copy, or from any part of
356it. (Additional permissions may be written to require their own
357removal in certain cases when you modify the work.) You may place
358additional permissions on material, added by you to a covered work,
359for which you have or can give appropriate copyright permission.
361 Notwithstanding any other provision of this License, for material you
362add to a covered work, you may (if authorized by the copyright holders of
363that material) supplement the terms of this License with terms:
365 a) Disclaiming warranty or limiting liability differently from the
366 terms of sections 15 and 16 of this License; or
368 b) Requiring preservation of specified reasonable legal notices or
369 author attributions in that material or in the Appropriate Legal
370 Notices displayed by works containing it; or
372 c) Prohibiting misrepresentation of the origin of that material, or
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384 it) with contractual assumptions of liability to the recipient, for
385 any liability that these contractual assumptions directly impose on
386 those licensors and authors.
388 All other non-permissive additional terms are considered "further
389restrictions" within the meaning of section 10. If the Program as you
390received it, or any part of it, contains a notice stating that it is
391governed by this License along with a term that is a further
392restriction, you may remove that term. If a license document contains
393a further restriction but permits relicensing or conveying under this
394License, you may add to a covered work material governed by the terms
395of that license document, provided that the further restriction does
396not survive such relicensing or conveying.
398 If you add terms to a covered work in accord with this section, you
399must place, in the relevant source files, a statement of the
400additional terms that apply to those files, or a notice indicating
401where to find the applicable terms.
403 Additional terms, permissive or non-permissive, may be stated in the
404form of a separately written license, or stated as exceptions;
405the above requirements apply either way.
407 8. Termination.
409 You may not propagate or modify a covered work except as expressly
410provided under this License. Any attempt otherwise to propagate or
411modify it is void, and will automatically terminate your rights under
412this License (including any patent licenses granted under the third
413paragraph of section 11).
415 However, if you cease all violation of this License, then your
416license from a particular copyright holder is reinstated (a)
417provisionally, unless and until the copyright holder explicitly and
418finally terminates your license, and (b) permanently, if the copyright
419holder fails to notify you of the violation by some reasonable means
420prior to 60 days after the cessation.
422 Moreover, your license from a particular copyright holder is
423reinstated permanently if the copyright holder notifies you of the
424violation by some reasonable means, this is the first time you have
425received notice of violation of this License (for any work) from that
426copyright holder, and you cure the violation prior to 30 days after
427your receipt of the notice.
429 Termination of your rights under this section does not terminate the
430licenses of parties who have received copies or rights from you under
431this License. If your rights have been terminated and not permanently
432reinstated, you do not qualify to receive new licenses for the same
433material under section 10.
435 9. Acceptance Not Required for Having Copies.
437 You are not required to accept this License in order to receive or
438run a copy of the Program. Ancillary propagation of a covered work
439occurring solely as a consequence of using peer-to-peer transmission
440to receive a copy likewise does not require acceptance. However,
441nothing other than this License grants you permission to propagate or
442modify any covered work. These actions infringe copyright if you do
443not accept this License. Therefore, by modifying or propagating a
444covered work, you indicate your acceptance of this License to do so.
446 10. Automatic Licensing of Downstream Recipients.
448 Each time you convey a covered work, the recipient automatically
449receives a license from the original licensors, to run, modify and
450propagate that work, subject to this License. You are not responsible
451for enforcing compliance by third parties with this License.
453 An "entity transaction" is a transaction transferring control of an
454organization, or substantially all assets of one, or subdividing an
455organization, or merging organizations. If propagation of a covered
456work results from an entity transaction, each party to that
457transaction who receives a copy of the work also receives whatever
458licenses to the work the party's predecessor in interest had or could
459give under the previous paragraph, plus a right to possession of the
460Corresponding Source of the work from the predecessor in interest, if
461the predecessor has it or can get it with reasonable efforts.
463 You may not impose any further restrictions on the exercise of the
464rights granted or affirmed under this License. For example, you may
465not impose a license fee, royalty, or other charge for exercise of
466rights granted under this License, and you may not initiate litigation
467(including a cross-claim or counterclaim in a lawsuit) alleging that
468any patent claim is infringed by making, using, selling, offering for
469sale, or importing the Program or any portion of it.
471 11. Patents.
473 A "contributor" is a copyright holder who authorizes use under this
474License of the Program or a work on which the Program is based. The
475work thus licensed is called the contributor's "contributor version".
477 A contributor's "essential patent claims" are all patent claims
478owned or controlled by the contributor, whether already acquired or
479hereafter acquired, that would be infringed by some manner, permitted
480by this License, of making, using, or selling its contributor version,
481but do not include claims that would be infringed only as a
482consequence of further modification of the contributor version. For
483purposes of this definition, "control" includes the right to grant
484patent sublicenses in a manner consistent with the requirements of
487 Each contributor grants you a non-exclusive, worldwide, royalty-free
488patent license under the contributor's essential patent claims, to
489make, use, sell, offer for sale, import and otherwise run, modify and
490propagate the contents of its contributor version.
492 In the following three paragraphs, a "patent license" is any express
493agreement or commitment, however denominated, not to enforce a patent
494(such as an express permission to practice a patent or covenant not to
495sue for patent infringement). To "grant" such a patent license to a
496party means to make such an agreement or commitment not to enforce a
497patent against the party.
499 If you convey a covered work, knowingly relying on a patent license,
500and the Corresponding Source of the work is not available for anyone
501to copy, free of charge and under the terms of this License, through a
502publicly available network server or other readily accessible means,
503then you must either (1) cause the Corresponding Source to be so
504available, or (2) arrange to deprive yourself of the benefit of the
505patent license for this particular work, or (3) arrange, in a manner
506consistent with the requirements of this License, to extend the patent
507license to downstream recipients. "Knowingly relying" means you have
508actual knowledge that, but for the patent license, your conveying the
509covered work in a country, or your recipient's use of the covered work
510in a country, would infringe one or more identifiable patents in that
511country that you have reason to believe are valid.
513 If, pursuant to or in connection with a single transaction or
514arrangement, you convey, or propagate by procuring conveyance of, a
515covered work, and grant a patent license to some of the parties
516receiving the covered work authorizing them to use, propagate, modify
517or convey a specific copy of the covered work, then the patent license
518you grant is automatically extended to all recipients of the covered
519work and works based on it.
521 A patent license is "discriminatory" if it does not include within
522the scope of its coverage, prohibits the exercise of, or is
523conditioned on the non-exercise of one or more of the rights that are
524specifically granted under this License. You may not convey a covered
525work if you are a party to an arrangement with a third party that is
526in the business of distributing software, under which you make payment
527to the third party based on the extent of your activity of conveying
528the work, and under which the third party grants, to any of the
529parties who would receive the covered work from you, a discriminatory
530patent license (a) in connection with copies of the covered work
531conveyed by you (or copies made from those copies), or (b) primarily
532for and in connection with specific products or compilations that
533contain the covered work, unless you entered into that arrangement,
534or that patent license was granted, prior to 28 March 2007.
536 Nothing in this License shall be construed as excluding or limiting
537any implied license or other defenses to infringement that may
538otherwise be available to you under applicable patent law.
540 12. No Surrender of Others' Freedom.
542 If conditions are imposed on you (whether by court order, agreement or
543otherwise) that contradict the conditions of this License, they do not
544excuse you from the conditions of this License. If you cannot convey a
545covered work so as to satisfy simultaneously your obligations under this
546License and any other pertinent obligations, then as a consequence you may
547not convey it at all. For example, if you agree to terms that obligate you
548to collect a royalty for further conveying from those to whom you convey
549the Program, the only way you could satisfy both those terms and this
550License would be to refrain entirely from conveying the Program.
552 13. Use with the GNU Affero General Public License.
554 Notwithstanding any other provision of this License, you have
555permission to link or combine any covered work with a work licensed
556under version 3 of the GNU Affero General Public License into a single
557combined work, and to convey the resulting work. The terms of this
558License will continue to apply to the part which is the covered work,
559but the special requirements of the GNU Affero General Public License,
560section 13, concerning interaction through a network will apply to the
561combination as such.
563 14. Revised Versions of this License.
565 The Free Software Foundation may publish revised and/or new versions of
566the GNU General Public License from time to time. Such new versions will
567be similar in spirit to the present version, but may differ in detail to
568address new problems or concerns.
570 Each version is given a distinguishing version number. If the
571Program specifies that a certain numbered version of the GNU General
572Public License "or any later version" applies to it, you have the
573option of following the terms and conditions either of that numbered
574version or of any later version published by the Free Software
575Foundation. If the Program does not specify a version number of the
576GNU General Public License, you may choose any version ever published
577by the Free Software Foundation.
579 If the Program specifies that a proxy can decide which future
580versions of the GNU General Public License can be used, that proxy's
581public statement of acceptance of a version permanently authorizes you
582to choose that version for the Program.
584 Later license versions may give you additional or different
585permissions. However, no additional obligations are imposed on any
586author or copyright holder as a result of your choosing to follow a
589 15. Disclaimer of Warranty.
591 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
600 16. Limitation of Liability.
602 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
612 17. Interpretation of Sections 15 and 16.
614 If the disclaimer of warranty and limitation of liability provided
615above cannot be given local legal effect according to their terms,
616reviewing courts shall apply local law that most closely approximates
617an absolute waiver of all civil liability in connection with the
618Program, unless a warranty or assumption of liability accompanies a
619copy of the Program in return for a fee.
621 END OF TERMS AND CONDITIONS
623 How to Apply These Terms to Your New Programs
625 If you develop a new program, and you want it to be of the greatest
626possible use to the public, the best way to achieve this is to make it
627free software which everyone can redistribute and change under these terms.
629 To do so, attach the following notices to the program. It is safest
630to attach them to the start of each source file to most effectively
631state the exclusion of warranty; and each file should have at least
632the "copyright" line and a pointer to where the full notice is found.
634 <one line to give the program's name and a brief idea of what it does.>
635 Copyright (C) <year> <name of author>
637 This program is free software: you can redistribute it and/or modify
638 it under the terms of the GNU General Public License as published by
639 the Free Software Foundation, either version 3 of the License, or
640 (at your option) any later version.
642 This program is distributed in the hope that it will be useful,
643 but WITHOUT ANY WARRANTY; without even the implied warranty of
644 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
645 GNU General Public License for more details.
647 You should have received a copy of the GNU General Public License
648 along with this program. If not, see <http://www.gnu.org/licenses/>.
650Also add information on how to contact you by electronic and paper mail.
652 If the program does terminal interaction, make it output a short
653notice like this when it starts in an interactive mode:
655 <program> Copyright (C) <year> <name of author>
656 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657 This is free software, and you are welcome to redistribute it
658 under certain conditions; type `show c' for details.
660The hypothetical commands `show w' and `show c' should show the appropriate
661parts of the General Public License. Of course, your program's commands
662might be different; for a GUI interface, you would use an "about box".
664 You should also get your employer (if you work as a programmer) or school,
665if any, to sign a "copyright disclaimer" for the program, if necessary.
666For more information on this, and how to apply and follow the GNU GPL, see
669 The GNU General Public License does not permit incorporating your program
670into proprietary programs. If your program is a subroutine library, you
671may consider it more useful to permit linking proprietary applications with
672the library. If this is what you want to do, use the GNU Lesser General
673Public License instead of this License. But first, please read