0001 Valid-License-Identifier: GPL-2.0
0002 Valid-License-Identifier: GPL-2.0-only
0003 Valid-License-Identifier: GPL-2.0+
0004 Valid-License-Identifier: GPL-2.0-or-later
0005 SPDX-URL: https://spdx.org/licenses/GPL-2.0.html
0006 Usage-Guide:
0007 To use this license in source code, put one of the following SPDX
0008 tag/value pairs into a comment according to the placement
0009 guidelines in the licensing rules documentation.
0010 For 'GNU General Public License (GPL) version 2 only' use:
0011 SPDX-License-Identifier: GPL-2.0
0012 or
0013 SPDX-License-Identifier: GPL-2.0-only
0014 For 'GNU General Public License (GPL) version 2 or any later version' use:
0015 SPDX-License-Identifier: GPL-2.0+
0016 or
0017 SPDX-License-Identifier: GPL-2.0-or-later
0018 License-Text:
0019
0020 GNU GENERAL PUBLIC LICENSE
0021 Version 2, June 1991
0022
0023 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
0024 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0025 Everyone is permitted to copy and distribute verbatim copies
0026 of this license document, but changing it is not allowed.
0027
0028 Preamble
0029
0030 The licenses for most software are designed to take away your
0031 freedom to share and change it. By contrast, the GNU General Public
0032 License is intended to guarantee your freedom to share and change free
0033 software--to make sure the software is free for all its users. This
0034 General Public License applies to most of the Free Software
0035 Foundation's software and to any other program whose authors commit to
0036 using it. (Some other Free Software Foundation software is covered by
0037 the GNU Library General Public License instead.) You can apply it to
0038 your programs, too.
0039
0040 When we speak of free software, we are referring to freedom, not
0041 price. Our General Public Licenses are designed to make sure that you
0042 have the freedom to distribute copies of free software (and charge for
0043 this service if you wish), that you receive source code or can get it
0044 if you want it, that you can change the software or use pieces of it
0045 in new free programs; and that you know you can do these things.
0046
0047 To protect your rights, we need to make restrictions that forbid
0048 anyone to deny you these rights or to ask you to surrender the rights.
0049 These restrictions translate to certain responsibilities for you if you
0050 distribute copies of the software, or if you modify it.
0051
0052 For example, if you distribute copies of such a program, whether
0053 gratis or for a fee, you must give the recipients all the rights that
0054 you have. You must make sure that they, too, receive or can get the
0055 source code. And you must show them these terms so they know their
0056 rights.
0057
0058 We protect your rights with two steps: (1) copyright the software, and
0059 (2) offer you this license which gives you legal permission to copy,
0060 distribute and/or modify the software.
0061
0062 Also, for each author's protection and ours, we want to make certain
0063 that everyone understands that there is no warranty for this free
0064 software. If the software is modified by someone else and passed on, we
0065 want its recipients to know that what they have is not the original, so
0066 that any problems introduced by others will not reflect on the original
0067 authors' reputations.
0068
0069 Finally, any free program is threatened constantly by software
0070 patents. We wish to avoid the danger that redistributors of a free
0071 program will individually obtain patent licenses, in effect making the
0072 program proprietary. To prevent this, we have made it clear that any
0073 patent must be licensed for everyone's free use or not licensed at all.
0074
0075 The precise terms and conditions for copying, distribution and
0076 modification follow.
0077
0078 GNU GENERAL PUBLIC LICENSE
0079 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0080
0081 0. This License applies to any program or other work which contains
0082 a notice placed by the copyright holder saying it may be distributed
0083 under the terms of this General Public License. The "Program", below,
0084 refers to any such program or work, and a "work based on the Program"
0085 means either the Program or any derivative work under copyright law:
0086 that is to say, a work containing the Program or a portion of it,
0087 either verbatim or with modifications and/or translated into another
0088 language. (Hereinafter, translation is included without limitation in
0089 the term "modification".) Each licensee is addressed as "you".
0090
0091 Activities other than copying, distribution and modification are not
0092 covered by this License; they are outside its scope. The act of
0093 running the Program is not restricted, and the output from the Program
0094 is covered only if its contents constitute a work based on the
0095 Program (independent of having been made by running the Program).
0096 Whether that is true depends on what the Program does.
0097
0098 1. You may copy and distribute verbatim copies of the Program's
0099 source code as you receive it, in any medium, provided that you
0100 conspicuously and appropriately publish on each copy an appropriate
0101 copyright notice and disclaimer of warranty; keep intact all the
0102 notices that refer to this License and to the absence of any warranty;
0103 and give any other recipients of the Program a copy of this License
0104 along with the Program.
0105
0106 You may charge a fee for the physical act of transferring a copy, and
0107 you may at your option offer warranty protection in exchange for a fee.
0108
0109 2. You may modify your copy or copies of the Program or any portion
0110 of it, thus forming a work based on the Program, and copy and
0111 distribute such modifications or work under the terms of Section 1
0112 above, provided that you also meet all of these conditions:
0113
0114 a) You must cause the modified files to carry prominent notices
0115 stating that you changed the files and the date of any change.
0116
0117 b) You must cause any work that you distribute or publish, that in
0118 whole or in part contains or is derived from the Program or any
0119 part thereof, to be licensed as a whole at no charge to all third
0120 parties under the terms of this License.
0121
0122 c) If the modified program normally reads commands interactively
0123 when run, you must cause it, when started running for such
0124 interactive use in the most ordinary way, to print or display an
0125 announcement including an appropriate copyright notice and a
0126 notice that there is no warranty (or else, saying that you provide
0127 a warranty) and that users may redistribute the program under
0128 these conditions, and telling the user how to view a copy of this
0129 License. (Exception: if the Program itself is interactive but
0130 does not normally print such an announcement, your work based on
0131 the Program is not required to print an announcement.)
0132
0133 These requirements apply to the modified work as a whole. If
0134 identifiable sections of that work are not derived from the Program,
0135 and can be reasonably considered independent and separate works in
0136 themselves, then this License, and its terms, do not apply to those
0137 sections when you distribute them as separate works. But when you
0138 distribute the same sections as part of a whole which is a work based
0139 on the Program, the distribution of the whole must be on the terms of
0140 this License, whose permissions for other licensees extend to the
0141 entire whole, and thus to each and every part regardless of who wrote it.
0142
0143 Thus, it is not the intent of this section to claim rights or contest
0144 your rights to work written entirely by you; rather, the intent is to
0145 exercise the right to control the distribution of derivative or
0146 collective works based on the Program.
0147
0148 In addition, mere aggregation of another work not based on the Program
0149 with the Program (or with a work based on the Program) on a volume of
0150 a storage or distribution medium does not bring the other work under
0151 the scope of this License.
0152
0153 3. You may copy and distribute the Program (or a work based on it,
0154 under Section 2) in object code or executable form under the terms of
0155 Sections 1 and 2 above provided that you also do one of the following:
0156
0157 a) Accompany it with the complete corresponding machine-readable
0158 source code, which must be distributed under the terms of Sections
0159 1 and 2 above on a medium customarily used for software interchange; or,
0160
0161 b) Accompany it with a written offer, valid for at least three
0162 years, to give any third party, for a charge no more than your
0163 cost of physically performing source distribution, a complete
0164 machine-readable copy of the corresponding source code, to be
0165 distributed under the terms of Sections 1 and 2 above on a medium
0166 customarily used for software interchange; or,
0167
0168 c) Accompany it with the information you received as to the offer
0169 to distribute corresponding source code. (This alternative is
0170 allowed only for noncommercial distribution and only if you
0171 received the program in object code or executable form with such
0172 an offer, in accord with Subsection b above.)
0173
0174 The source code for a work means the preferred form of the work for
0175 making modifications to it. For an executable work, complete source
0176 code means all the source code for all modules it contains, plus any
0177 associated interface definition files, plus the scripts used to
0178 control compilation and installation of the executable. However, as a
0179 special exception, the source code distributed need not include
0180 anything that is normally distributed (in either source or binary
0181 form) with the major components (compiler, kernel, and so on) of the
0182 operating system on which the executable runs, unless that component
0183 itself accompanies the executable.
0184
0185 If distribution of executable or object code is made by offering
0186 access to copy from a designated place, then offering equivalent
0187 access to copy the source code from the same place counts as
0188 distribution of the source code, even though third parties are not
0189 compelled to copy the source along with the object code.
0190
0191 4. You may not copy, modify, sublicense, or distribute the Program
0192 except as expressly provided under this License. Any attempt
0193 otherwise to copy, modify, sublicense or distribute the Program is
0194 void, and will automatically terminate your rights under this License.
0195 However, parties who have received copies, or rights, from you under
0196 this License will not have their licenses terminated so long as such
0197 parties remain in full compliance.
0198
0199 5. You are not required to accept this License, since you have not
0200 signed it. However, nothing else grants you permission to modify or
0201 distribute the Program or its derivative works. These actions are
0202 prohibited by law if you do not accept this License. Therefore, by
0203 modifying or distributing the Program (or any work based on the
0204 Program), you indicate your acceptance of this License to do so, and
0205 all its terms and conditions for copying, distributing or modifying
0206 the Program or works based on it.
0207
0208 6. Each time you redistribute the Program (or any work based on the
0209 Program), the recipient automatically receives a license from the
0210 original licensor to copy, distribute or modify the Program subject to
0211 these terms and conditions. You may not impose any further
0212 restrictions on the recipients' exercise of the rights granted herein.
0213 You are not responsible for enforcing compliance by third parties to
0214 this License.
0215
0216 7. If, as a consequence of a court judgment or allegation of patent
0217 infringement or for any other reason (not limited to patent issues),
0218 conditions are imposed on you (whether by court order, agreement or
0219 otherwise) that contradict the conditions of this License, they do not
0220 excuse you from the conditions of this License. If you cannot
0221 distribute so as to satisfy simultaneously your obligations under this
0222 License and any other pertinent obligations, then as a consequence you
0223 may not distribute the Program at all. For example, if a patent
0224 license would not permit royalty-free redistribution of the Program by
0225 all those who receive copies directly or indirectly through you, then
0226 the only way you could satisfy both it and this License would be to
0227 refrain entirely from distribution of the Program.
0228
0229 If any portion of this section is held invalid or unenforceable under
0230 any particular circumstance, the balance of the section is intended to
0231 apply and the section as a whole is intended to apply in other
0232 circumstances.
0233
0234 It is not the purpose of this section to induce you to infringe any
0235 patents or other property right claims or to contest validity of any
0236 such claims; this section has the sole purpose of protecting the
0237 integrity of the free software distribution system, which is
0238 implemented by public license practices. Many people have made
0239 generous contributions to the wide range of software distributed
0240 through that system in reliance on consistent application of that
0241 system; it is up to the author/donor to decide if he or she is willing
0242 to distribute software through any other system and a licensee cannot
0243 impose that choice.
0244
0245 This section is intended to make thoroughly clear what is believed to
0246 be a consequence of the rest of this License.
0247
0248 8. If the distribution and/or use of the Program is restricted in
0249 certain countries either by patents or by copyrighted interfaces, the
0250 original copyright holder who places the Program under this License
0251 may add an explicit geographical distribution limitation excluding
0252 those countries, so that distribution is permitted only in or among
0253 countries not thus excluded. In such case, this License incorporates
0254 the limitation as if written in the body of this License.
0255
0256 9. The Free Software Foundation may publish revised and/or new versions
0257 of the General Public License from time to time. Such new versions will
0258 be similar in spirit to the present version, but may differ in detail to
0259 address new problems or concerns.
0260
0261 Each version is given a distinguishing version number. If the Program
0262 specifies a version number of this License which applies to it and "any
0263 later version", you have the option of following the terms and conditions
0264 either of that version or of any later version published by the Free
0265 Software Foundation. If the Program does not specify a version number of
0266 this License, you may choose any version ever published by the Free Software
0267 Foundation.
0268
0269 10. If you wish to incorporate parts of the Program into other free
0270 programs whose distribution conditions are different, write to the author
0271 to ask for permission. For software which is copyrighted by the Free
0272 Software Foundation, write to the Free Software Foundation; we sometimes
0273 make exceptions for this. Our decision will be guided by the two goals
0274 of preserving the free status of all derivatives of our free software and
0275 of promoting the sharing and reuse of software generally.
0276
0277 NO WARRANTY
0278
0279 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
0280 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
0281 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
0282 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
0283 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
0284 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
0285 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
0286 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
0287 REPAIR OR CORRECTION.
0288
0289 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
0290 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
0291 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
0292 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
0293 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
0294 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
0295 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
0296 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
0297 POSSIBILITY OF SUCH DAMAGES.
0298
0299 END OF TERMS AND CONDITIONS
0300
0301 How to Apply These Terms to Your New Programs
0302
0303 If you develop a new program, and you want it to be of the greatest
0304 possible use to the public, the best way to achieve this is to make it
0305 free software which everyone can redistribute and change under these terms.
0306
0307 To do so, attach the following notices to the program. It is safest
0308 to attach them to the start of each source file to most effectively
0309 convey the exclusion of warranty; and each file should have at least
0310 the "copyright" line and a pointer to where the full notice is found.
0311
0312 <one line to give the program's name and a brief idea of what it does.>
0313 Copyright (C) <year> <name of author>
0314
0315 This program is free software; you can redistribute it and/or modify
0316 it under the terms of the GNU General Public License as published by
0317 the Free Software Foundation; either version 2 of the License, or
0318 (at your option) any later version.
0319
0320 This program is distributed in the hope that it will be useful,
0321 but WITHOUT ANY WARRANTY; without even the implied warranty of
0322 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
0323 GNU General Public License for more details.
0324
0325 You should have received a copy of the GNU General Public License
0326 along with this program; if not, write to the Free Software
0327 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
0328
0329
0330 Also add information on how to contact you by electronic and paper mail.
0331
0332 If the program is interactive, make it output a short notice like this
0333 when it starts in an interactive mode:
0334
0335 Gnomovision version 69, Copyright (C) year name of author
0336 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
0337 This is free software, and you are welcome to redistribute it
0338 under certain conditions; type `show c' for details.
0339
0340 The hypothetical commands `show w' and `show c' should show the appropriate
0341 parts of the General Public License. Of course, the commands you use may
0342 be called something other than `show w' and `show c'; they could even be
0343 mouse-clicks or menu items--whatever suits your program.
0344
0345 You should also get your employer (if you work as a programmer) or your
0346 school, if any, to sign a "copyright disclaimer" for the program, if
0347 necessary. Here is a sample; alter the names:
0348
0349 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
0350 `Gnomovision' (which makes passes at compilers) written by James Hacker.
0351
0352 <signature of Ty Coon>, 1 April 1989
0353 Ty Coon, President of Vice
0354
0355 This General Public License does not permit incorporating your program into
0356 proprietary programs. If your program is a subroutine library, you may
0357 consider it more useful to permit linking proprietary applications with the
0358 library. If this is what you want to do, use the GNU Library General
0359 Public License instead of this License.