files/common-licenses/GPL-3.0-or-later

21 authors. You can apply it to your programs, too.
24 General Public Licenses are designed to make sure that you have the freedom
25 to distribute copies of free software (and charge for them if you wish), that
26 you receive source code or can get it if you want it, that you can change
27 the software or use pieces of it in new free programs, and that you know you
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35 For example, if you distribute copies of such a program, whether gratis or
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37 You must make sure that they, too, receive or can get the source code. And
38 you must show them these terms so they know their rights.
41 copyright on the software, and (2) offer you this License giving you legal
79 Each licensee is addressed as "you". "Licensees" and "recipients" may be individuals
91 would make you directly or secondarily liable for infringement under applicable
156 You may make, run and propagate covered works that you do not convey, without
157 conditions so long as your license otherwise remains in force. You may convey
159 exclusively for you, or provide you with facilities for running those works,
160 provided that you comply with the terms of this License in conveying all material
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164 material outside their relationship with you.
176 When you convey a covered work, you waive any legal power to forbid circumvention
179 you disclaim any intention to limit operation or modification of the work
185 You may convey verbatim copies of the Program's source code as you receive
186 it, in any medium, provided that you conspicuously and appropriately publish
192 You may charge any price or no price for each copy that you convey, and you
197 You may convey a work based on the Program, or the modifications to produce
199 4, provided that you also meet all of these conditions:
201 a) The work must carry prominent notices stating that you modified it, and
208 c) You must license the entire work, as a whole, under this License to anyone
213 such permission if you have separately received it.
230 You may convey a covered work in object code form under the terms of sections
231 4 and 5, provided that you also convey the machine-readable Corresponding
240 at least three years and valid for as long as you offer spare parts or customer
250 occasionally and noncommercially, and only if you received the object code
255 in the same way through the same place at no further charge. You need not
258 Source may be on a different server (operated by you or a third party) that
259 supports equivalent copying facilities, provided you maintain clear directions
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297 does not apply if neither you nor any third party retains the ability to install
324 When you convey a copy of a covered work, you may at your option remove any
327 you modify the work.) You may place additional permissions on material, added
328 by you to a covered work, for which you have or can give appropriate copyright
331 Notwithstanding any other provision of this License, for material you add
332 to a covered work, you may (if authorized by the copyright holders of that
358 within the meaning of section 10. If the Program as you received it, or any
360 along with a term that is a further restriction, you may remove that term.
362 or conveying under this License, you may add to a covered work material governed
366 If you add terms to a covered work in accord with this section, you must place,
376 You may not propagate or modify a covered work except as expressly provided
381 However, if you cease all violation of this License, then your license from
384 and (b) permanently, if the copyright holder fails to notify you of the violation
388 if the copyright holder notifies you of the violation by some reasonable means,
389 this is the first time you have received notice of violation of this License
390 (for any work) from that copyright holder, and you cure the violation prior
394 of parties who have received copies or rights from you under this License.
395 If your rights have been terminated and not permanently reinstated, you do
400 You are not required to accept this License in order to receive or run a copy
404 you permission to propagate or modify any covered work. These actions infringe
405 copyright if you do not accept this License. Therefore, by modifying or propagating
406 a covered work, you indicate your acceptance of this License to do so.
410 Each time you convey a covered work, the recipient automatically receives
412 subject to this License. You are not responsible for enforcing compliance
424 You may not impose any further restrictions on the exercise of the rights
425 granted or affirmed under this License. For example, you may not impose a
427 this License, and you may not initiate litigation (including a cross-claim
447 Each contributor grants you a non-exclusive, worldwide, royalty-free patent
458 If you convey a covered work, knowingly relying on a patent license, and the
461 network server or other readily accessible means, then you must either (1)
466 means you have actual knowledge that, but for the patent license, your conveying
469 that you have reason to believe are valid.
472 you convey, or propagate by procuring conveyance of, a covered work, and grant
475 then the patent license you grant is automatically extended to all recipients
481 You may not convey a covered work if you are a party to an arrangement with
483 you make payment to the third party based on the extent of your activity of
485 parties who would receive the covered work from you, a discriminatory patent
486 license (a) in connection with copies of the covered work conveyed by you
489 you entered into that arrangement, or that patent license was granted, prior
494 to you under applicable patent law.
498 If conditions are imposed on you (whether by court order, agreement or otherwise)
499 that contradict the conditions of this License, they do not excuse you from
500 the conditions of this License. If you cannot convey a covered work so as
502 pertinent obligations, then as a consequence you may not convey it at all.
503 For example, if you agree to terms that obligate you to collect a royalty
504 for further conveying from those to whom you convey the Program, the only
505 way you could satisfy both those terms and this License would be to refrain
510 Notwithstanding any other provision of this License, you have permission to
527 later version" applies to it, you have the option of following the terms and
530 number of the GNU General Public License, you may choose any version ever
535 of acceptance of a version permanently authorizes you to choose that version
538 Later license versions may give you additional or different permissions. However,
549 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM
550 PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
557 AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL,
560 INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
575 If you develop a new program, and you want it to be of the greatest possible
588 This program is free software: you can redistribute it and/or modify it under
597 You should have received a copy of the GNU General Public License along with
600 Also add information on how to contact you by electronic and paper mail.
609 This is free software, and you are welcome to redistribute it under certain
614 be different; for a GUI interface, you would use an "about box".
616 You should also get your employer (if you work as a programmer) or school,
621 into proprietary programs. If your program is a subroutine library, you may
623 library. If this is what you want to do, use the GNU Lesser General Public