1 GNU GENERAL PUBLIC LICENSE
2 ==========================
4 Version 3, 29 June 2007
6 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
8 Everyone is permitted to copy and distribute verbatim copies of this
9 license document, but changing it is not allowed.
14 The GNU General Public License is a free, copyleft license for
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17 The licenses for most software and other practical works are designed
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100 permission, would make you directly or secondarily liable for
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142 The "Corresponding Source" for a work in object code form means all
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147 programs which are used unmodified in performing those activities but
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155 The Corresponding Source need not include anything that users can
156 regenerate automatically from other parts of the Corresponding Source.
158 The Corresponding Source for a work in source code form is that same
161 ### 2. Basic Permissions.
163 All rights granted under this License are granted for the term of
164 copyright on the Program, and are irrevocable provided the stated
165 conditions are met. This License explicitly affirms your unlimited
166 permission to run the unmodified Program. The output from running a
167 covered work is covered by this License only if the output, given its
168 content, constitutes a covered work. This License acknowledges your
169 rights of fair use or other equivalent, as provided by copyright law.
171 You may make, run and propagate covered works that you do not convey,
172 without conditions so long as your license otherwise remains in force.
173 You may convey covered works to others for the sole purpose of having
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175 facilities for running those works, provided that you comply with the
176 terms of this License in conveying all material for which you do not
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179 control, on terms that prohibit them from making any copies of your
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182 Conveying under any other circumstances is permitted solely under the
183 conditions stated below. Sublicensing is not allowed; section 10 makes
186 ### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
188 No covered work shall be deemed part of an effective technological
189 measure under any applicable law fulfilling obligations under article
190 11 of the WIPO copyright treaty adopted on 20 December 1996, or
191 similar laws prohibiting or restricting circumvention of such
194 When you convey a covered work, you waive any legal power to forbid
195 circumvention of technological measures to the extent such
196 circumvention is effected by exercising rights under this License with
197 respect to the covered work, and you disclaim any intention to limit
198 operation or modification of the work as a means of enforcing, against
199 the work's users, your or third parties' legal rights to forbid
200 circumvention of technological measures.
202 ### 4. Conveying Verbatim Copies.
204 You may convey verbatim copies of the Program's source code as you
205 receive it, in any medium, provided that you conspicuously and
206 appropriately publish on each copy an appropriate copyright notice;
207 keep intact all notices stating that this License and any
208 non-permissive terms added in accord with section 7 apply to the code;
209 keep intact all notices of the absence of any warranty; and give all
210 recipients a copy of this License along with the Program.
212 You may charge any price or no price for each copy that you convey,
213 and you may offer support or warranty protection for a fee.
215 ### 5. Conveying Modified Source Versions.
217 You may convey a work based on the Program, or the modifications to
218 produce it from the Program, in the form of source code under the
219 terms of section 4, provided that you also meet all of these
222 - a) The work must carry prominent notices stating that you
223 modified it, and giving a relevant date.
225 - b) The work must carry prominent notices stating that it is
226 released under this License and any conditions added under
227 section 7. This requirement modifies the requirement in
228 section 4 to "keep intact all notices".
230 - c) You must license the entire work, as a whole, under this
231 License to anyone who comes into possession of a copy. This
232 License will therefore apply, along with any applicable
233 section 7 additional terms, to the whole of the work, and all
234 its parts, regardless of how they are packaged. This License
235 gives no permission to license the work in any other way, but
236 it does not invalidate such permission if you have separately
239 - d) If the work has interactive user interfaces, each must display
240 Appropriate Legal Notices; however, if the Program has
241 interactive interfaces that do not display Appropriate Legal
242 Notices, your work need not make them do so.
244 A compilation of a covered work with other separate and independent
245 works, which are not by their nature extensions of the covered work,
246 and which are not combined with it such as to form a larger program,
247 in or on a volume of a storage or distribution medium, is called an
248 "aggregate" if the compilation and its resulting copyright are not
249 used to limit the access or legal rights of the compilation's users
250 beyond what the individual works permit. Inclusion of a covered work
251 in an aggregate does not cause this License to apply to the other
252 parts of the aggregate.
254 ### 6. Conveying Non-Source Forms.
256 You may convey a covered work in object code form under the terms of
257 sections 4 and 5, provided that you also convey the machine-readable
258 Corresponding Source under the terms of this License, in one of these
261 - a) Convey the object code in, or embodied in, a physical product
262 (including a physical distribution medium), accompanied by the
263 Corresponding Source fixed on a durable physical medium
264 customarily used for software interchange.
266 - b) Convey the object code in, or embodied in, a physical product
267 (including a physical distribution medium), accompanied by a
268 written offer, valid for at least three years and valid for as
269 long as you offer spare parts or customer support for that
270 product model, to give anyone who possesses the object code
271 either (1) a copy of the Corresponding Source for all the
272 software in the product that is covered by this License, on a
273 durable physical medium customarily used for software
274 interchange, for a price no more than your reasonable cost of
275 physically performing this conveying of source, or (2) access
276 to copy the Corresponding Source from a network server at no
279 - c) Convey individual copies of the object code with a copy of the
280 written offer to provide the Corresponding Source. This
281 alternative is allowed only occasionally and noncommercially,
282 and only if you received the object code with such an offer,
283 in accord with subsection 6b.
285 - d) Convey the object code by offering access from a designated
286 place (gratis or for a charge), and offer equivalent access to
287 the Corresponding Source in the same way through the same
288 place at no further charge. You need not require recipients to
289 copy the Corresponding Source along with the object code. If
290 the place to copy the object code is a network server, the
291 Corresponding Source may be on a different server (operated by
292 you or a third party) that supports equivalent copying
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294 object code saying where to find the Corresponding Source.
295 Regardless of what server hosts the Corresponding Source, you
296 remain obligated to ensure that it is available for as long as
297 needed to satisfy these requirements.
299 - e) Convey the object code using peer-to-peer transmission,
300 provided you inform other peers where the object code and
301 Corresponding Source of the work are being offered to the
302 general public at no charge under subsection 6d.
304 A separable portion of the object code, whose source code is excluded
305 from the Corresponding Source as a System Library, need not be
306 included in conveying the object code work.
308 A "User Product" is either (1) a "consumer product", which means any
309 tangible personal property which is normally used for personal,
310 family, or household purposes, or (2) anything designed or sold for
311 incorporation into a dwelling. In determining whether a product is a
312 consumer product, doubtful cases shall be resolved in favor of
313 coverage. For a particular product received by a particular user,
314 "normally used" refers to a typical or common use of that class of
315 product, regardless of the status of the particular user or of the way
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317 to use, the product. A product is a consumer product regardless of
318 whether the product has substantial commercial, industrial or
319 non-consumer uses, unless such uses represent the only significant
320 mode of use of the product.
322 "Installation Information" for a User Product means any methods,
323 procedures, authorization keys, or other information required to
324 install and execute modified versions of a covered work in that User
325 Product from a modified version of its Corresponding Source. The
326 information must suffice to ensure that the continued functioning of
327 the modified object code is in no case prevented or interfered with
328 solely because modification has been made.
330 If you convey an object code work under this section in, or with, or
331 specifically for use in, a User Product, and the conveying occurs as
332 part of a transaction in which the right of possession and use of the
333 User Product is transferred to the recipient in perpetuity or for a
334 fixed term (regardless of how the transaction is characterized), the
335 Corresponding Source conveyed under this section must be accompanied
336 by the Installation Information. But this requirement does not apply
337 if neither you nor any third party retains the ability to install
338 modified object code on the User Product (for example, the work has
339 been installed in ROM).
341 The requirement to provide Installation Information does not include a
342 requirement to continue to provide support service, warranty, or
343 updates for a work that has been modified or installed by the
344 recipient, or for the User Product in which it has been modified or
345 installed. Access to a network may be denied when the modification
346 itself materially and adversely affects the operation of the network
347 or violates the rules and protocols for communication across the
350 Corresponding Source conveyed, and Installation Information provided,
351 in accord with this section must be in a format that is publicly
352 documented (and with an implementation available to the public in
353 source code form), and must require no special password or key for
354 unpacking, reading or copying.
356 ### 7. Additional Terms.
358 "Additional permissions" are terms that supplement the terms of this
359 License by making exceptions from one or more of its conditions.
360 Additional permissions that are applicable to the entire Program shall
361 be treated as though they were included in this License, to the extent
362 that they are valid under applicable law. If additional permissions
363 apply only to part of the Program, that part may be used separately
364 under those permissions, but the entire Program remains governed by
365 this License without regard to the additional permissions.
367 When you convey a copy of a covered work, you may at your option
368 remove any additional permissions from that copy, or from any part of
369 it. (Additional permissions may be written to require their own
370 removal in certain cases when you modify the work.) You may place
371 additional permissions on material, added by you to a covered work,
372 for which you have or can give appropriate copyright permission.
374 Notwithstanding any other provision of this License, for material you
375 add to a covered work, you may (if authorized by the copyright holders
376 of that material) supplement the terms of this License with terms:
378 - a) Disclaiming warranty or limiting liability differently from
379 the terms of sections 15 and 16 of this License; or
381 - b) Requiring preservation of specified reasonable legal notices
382 or author attributions in that material or in the Appropriate
383 Legal Notices displayed by works containing it; or
385 - c) Prohibiting misrepresentation of the origin of that material,
386 or requiring that modified versions of such material be marked
387 in reasonable ways as different from the original version; or
389 - d) Limiting the use for publicity purposes of names of licensors
390 or authors of the material; or
392 - e) Declining to grant rights under trademark law for use of some
393 trade names, trademarks, or service marks; or
395 - f) Requiring indemnification of licensors and authors of that
396 material by anyone who conveys the material (or modified
397 versions of it) with contractual assumptions of liability to
398 the recipient, for any liability that these contractual
399 assumptions directly impose on those licensors and authors.
401 All other non-permissive additional terms are considered "further
402 restrictions" within the meaning of section 10. If the Program as you
403 received it, or any part of it, contains a notice stating that it is
404 governed by this License along with a term that is a further
405 restriction, you may remove that term. If a license document contains
406 a further restriction but permits relicensing or conveying under this
407 License, you may add to a covered work material governed by the terms
408 of that license document, provided that the further restriction does
409 not survive such relicensing or conveying.
411 If you add terms to a covered work in accord with this section, you
412 must place, in the relevant source files, a statement of the
413 additional terms that apply to those files, or a notice indicating
414 where to find the applicable terms.
416 Additional terms, permissive or non-permissive, may be stated in the
417 form of a separately written license, or stated as exceptions; the
418 above requirements apply either way.
422 You may not propagate or modify a covered work except as expressly
423 provided under this License. Any attempt otherwise to propagate or
424 modify it is void, and will automatically terminate your rights under
425 this License (including any patent licenses granted under the third
426 paragraph of section 11).
428 However, if you cease all violation of this License, then your license
429 from a particular copyright holder is reinstated (a) provisionally,
430 unless and until the copyright holder explicitly and finally
431 terminates your license, and (b) permanently, if the copyright holder
432 fails to notify you of the violation by some reasonable means prior to
433 60 days after the cessation.
435 Moreover, your license from a particular copyright holder is
436 reinstated permanently if the copyright holder notifies you of the
437 violation by some reasonable means, this is the first time you have
438 received notice of violation of this License (for any work) from that
439 copyright holder, and you cure the violation prior to 30 days after
440 your receipt of the notice.
442 Termination of your rights under this section does not terminate the
443 licenses of parties who have received copies or rights from you under
444 this License. If your rights have been terminated and not permanently
445 reinstated, you do not qualify to receive new licenses for the same
446 material under section 10.
448 ### 9. Acceptance Not Required for Having Copies.
450 You are not required to accept this License in order to receive or run
451 a copy of the Program. Ancillary propagation of a covered work
452 occurring solely as a consequence of using peer-to-peer transmission
453 to receive a copy likewise does not require acceptance. However,
454 nothing other than this License grants you permission to propagate or
455 modify any covered work. These actions infringe copyright if you do
456 not accept this License. Therefore, by modifying or propagating a
457 covered work, you indicate your acceptance of this License to do so.
459 ### 10. Automatic Licensing of Downstream Recipients.
461 Each time you convey a covered work, the recipient automatically
462 receives a license from the original licensors, to run, modify and
463 propagate that work, subject to this License. You are not responsible
464 for enforcing compliance by third parties with this License.
466 An "entity transaction" is a transaction transferring control of an
467 organization, or substantially all assets of one, or subdividing an
468 organization, or merging organizations. If propagation of a covered
469 work results from an entity transaction, each party to that
470 transaction who receives a copy of the work also receives whatever
471 licenses to the work the party's predecessor in interest had or could
472 give under the previous paragraph, plus a right to possession of the
473 Corresponding Source of the work from the predecessor in interest, if
474 the predecessor has it or can get it with reasonable efforts.
476 You may not impose any further restrictions on the exercise of the
477 rights granted or affirmed under this License. For example, you may
478 not impose a license fee, royalty, or other charge for exercise of
479 rights granted under this License, and you may not initiate litigation
480 (including a cross-claim or counterclaim in a lawsuit) alleging that
481 any patent claim is infringed by making, using, selling, offering for
482 sale, or importing the Program or any portion of it.
486 A "contributor" is a copyright holder who authorizes use under this
487 License of the Program or a work on which the Program is based. The
488 work thus licensed is called the contributor's "contributor version".
490 A contributor's "essential patent claims" are all patent claims owned
491 or controlled by the contributor, whether already acquired or
492 hereafter acquired, that would be infringed by some manner, permitted
493 by this License, of making, using, or selling its contributor version,
494 but do not include claims that would be infringed only as a
495 consequence of further modification of the contributor version. For
496 purposes of this definition, "control" includes the right to grant
497 patent sublicenses in a manner consistent with the requirements of
500 Each contributor grants you a non-exclusive, worldwide, royalty-free
501 patent license under the contributor's essential patent claims, to
502 make, use, sell, offer for sale, import and otherwise run, modify and
503 propagate the contents of its contributor version.
505 In the following three paragraphs, a "patent license" is any express
506 agreement or commitment, however denominated, not to enforce a patent
507 (such as an express permission to practice a patent or covenant not to
508 sue for patent infringement). To "grant" such a patent license to a
509 party means to make such an agreement or commitment not to enforce a
510 patent against the party.
512 If you convey a covered work, knowingly relying on a patent license,
513 and the Corresponding Source of the work is not available for anyone
514 to copy, free of charge and under the terms of this License, through a
515 publicly available network server or other readily accessible means,
516 then you must either (1) cause the Corresponding Source to be so
517 available, or (2) arrange to deprive yourself of the benefit of the
518 patent license for this particular work, or (3) arrange, in a manner
519 consistent with the requirements of this License, to extend the patent
520 license to downstream recipients. "Knowingly relying" means you have
521 actual knowledge that, but for the patent license, your conveying the
522 covered work in a country, or your recipient's use of the covered work
523 in a country, would infringe one or more identifiable patents in that
524 country that you have reason to believe are valid.
526 If, pursuant to or in connection with a single transaction or
527 arrangement, you convey, or propagate by procuring conveyance of, a
528 covered work, and grant a patent license to some of the parties
529 receiving the covered work authorizing them to use, propagate, modify
530 or convey a specific copy of the covered work, then the patent license
531 you grant is automatically extended to all recipients of the covered
532 work and works based on it.
534 A patent license is "discriminatory" if it does not include within the
535 scope of its coverage, prohibits the exercise of, or is conditioned on
536 the non-exercise of one or more of the rights that are specifically
537 granted under this License. You may not convey a covered work if you
538 are a party to an arrangement with a third party that is in the
539 business of distributing software, under which you make payment to the
540 third party based on the extent of your activity of conveying the
541 work, and under which the third party grants, to any of the parties
542 who would receive the covered work from you, a discriminatory patent
543 license (a) in connection with copies of the covered work conveyed by
544 you (or copies made from those copies), or (b) primarily for and in
545 connection with specific products or compilations that contain the
546 covered work, unless you entered into that arrangement, or that patent
547 license was granted, prior to 28 March 2007.
549 Nothing in this License shall be construed as excluding or limiting
550 any implied license or other defenses to infringement that may
551 otherwise be available to you under applicable patent law.
553 ### 12. No Surrender of Others' Freedom.
555 If conditions are imposed on you (whether by court order, agreement or
556 otherwise) that contradict the conditions of this License, they do not
557 excuse you from the conditions of this License. If you cannot convey a
558 covered work so as to satisfy simultaneously your obligations under
559 this License and any other pertinent obligations, then as a
560 consequence you may not convey it at all. For example, if you agree to
561 terms that obligate you to collect a royalty for further conveying
562 from those to whom you convey the Program, the only way you could
563 satisfy both those terms and this License would be to refrain entirely
564 from conveying the Program.
566 ### 13. Use with the GNU Affero General Public License.
568 Notwithstanding any other provision of this License, you have
569 permission to link or combine any covered work with a work licensed
570 under version 3 of the GNU Affero General Public License into a single
571 combined work, and to convey the resulting work. The terms of this
572 License will continue to apply to the part which is the covered work,
573 but the special requirements of the GNU Affero General Public License,
574 section 13, concerning interaction through a network will apply to the
577 ### 14. Revised Versions of this License.
579 The Free Software Foundation may publish revised and/or new versions
580 of the GNU General Public License from time to time. Such new versions
581 will be similar in spirit to the present version, but may differ in
582 detail to address new problems or concerns.
584 Each version is given a distinguishing version number. If the Program
585 specifies that a certain numbered version of the GNU General Public
586 License "or any later version" applies to it, you have the option of
587 following the terms and conditions either of that numbered version or
588 of any later version published by the Free Software Foundation. If the
589 Program does not specify a version number of the GNU General Public
590 License, you may choose any version ever published by the Free
593 If the Program specifies that a proxy can decide which future versions
594 of the GNU General Public License can be used, that proxy's public
595 statement of acceptance of a version permanently authorizes you to
596 choose that version for the Program.
598 Later license versions may give you additional or different
599 permissions. However, no additional obligations are imposed on any
600 author or copyright holder as a result of your choosing to follow a
603 ### 15. Disclaimer of Warranty.
605 THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
606 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
607 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
608 WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
609 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
610 A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
611 PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
612 DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
615 ### 16. Limitation of Liability.
617 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
618 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
619 CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
620 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
621 ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
622 NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
623 LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
624 TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
625 PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
627 ### 17. Interpretation of Sections 15 and 16.
629 If the disclaimer of warranty and limitation of liability provided
630 above cannot be given local legal effect according to their terms,
631 reviewing courts shall apply local law that most closely approximates
632 an absolute waiver of all civil liability in connection with the
633 Program, unless a warranty or assumption of liability accompanies a
634 copy of the Program in return for a fee.
636 END OF TERMS AND CONDITIONS
638 How to Apply These Terms to Your New Programs
639 ---------------------------------------------
641 If you develop a new program, and you want it to be of the greatest
642 possible use to the public, the best way to achieve this is to make it
643 free software which everyone can redistribute and change under these
646 To do so, attach the following notices to the program. It is safest to
647 attach them to the start of each source file to most effectively state
648 the exclusion of warranty; and each file should have at least the
649 "copyright" line and a pointer to where the full notice is found.
651 <one line to give the program's name and a brief idea of what it does.>
652 Copyright (C) <year> <name of author>
654 This program is free software: you can redistribute it and/or modify
655 it under the terms of the GNU General Public License as published by
656 the Free Software Foundation, either version 3 of the License, or
657 (at your option) any later version.
659 This program is distributed in the hope that it will be useful,
660 but WITHOUT ANY WARRANTY; without even the implied warranty of
661 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
662 GNU General Public License for more details.
664 You should have received a copy of the GNU General Public License
665 along with this program. If not, see <https://www.gnu.org/licenses/>.
667 Also add information on how to contact you by electronic and paper
670 If the program does terminal interaction, make it output a short
671 notice like this when it starts in an interactive mode:
673 <program> Copyright (C) <year> <name of author>
674 This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
675 This is free software, and you are welcome to redistribute it
676 under certain conditions; type `show c' for details.
678 The hypothetical commands \`show w' and \`show c' should show the
679 appropriate parts of the General Public License. Of course, your
680 program's commands might be different; for a GUI interface, you would
683 You should also get your employer (if you work as a programmer) or
684 school, if any, to sign a "copyright disclaimer" for the program, if
685 necessary. For more information on this, and how to apply and follow
686 the GNU GPL, see <https://www.gnu.org/licenses/>.
688 The GNU General Public License does not permit incorporating your
689 program into proprietary programs. If your program is a subroutine
690 library, you may consider it more useful to permit linking proprietary
691 applications with the library. If this is what you want to do, use the
692 GNU Lesser General Public License instead of this License. But first,
693 please read <https://www.gnu.org/licenses/why-not-lgpl.html>.
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