| 1 | ␉␉ GNU GENERAL PUBLIC LICENSE␊ |
| 2 | ␉␉ Version 2, June 1991␊ |
| 3 | ␊ |
| 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc.␊ |
| 5 | 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA␊ |
| 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 licenses for most software are designed to take away your␊ |
| 12 | freedom to share and change it. By contrast, the GNU General Public␊ |
| 13 | License is intended to guarantee your freedom to share and change free␊ |
| 14 | software--to make sure the software is free for all its users. This␊ |
| 15 | General Public License applies to most of the Free Software␊ |
| 16 | Foundation's software and to any other program whose authors commit to␊ |
| 17 | using it. (Some other Free Software Foundation software is covered by␊ |
| 18 | the GNU Library General Public License instead.) You can apply it to␊ |
| 19 | your programs, too.␊ |
| 20 | ␊ |
| 21 | When we speak of free software, we are referring to freedom, not␊ |
| 22 | price. Our General Public Licenses are designed to make sure that you␊ |
| 23 | have the freedom to distribute copies of free software (and charge for␊ |
| 24 | this service if you wish), that you receive source code or can get it␊ |
| 25 | if you want it, that you can change the software or use pieces of it␊ |
| 26 | in new free programs; and that you know you can do these things.␊ |
| 27 | ␊ |
| 28 | To protect your rights, we need to make restrictions that forbid␊ |
| 29 | anyone to deny you these rights or to ask you to surrender the rights.␊ |
| 30 | These restrictions translate to certain responsibilities for you if you␊ |
| 31 | distribute copies of the software, or if you modify it.␊ |
| 32 | ␊ |
| 33 | For example, if you distribute copies of such a program, whether␊ |
| 34 | gratis or for a fee, you must give the recipients all the rights that␊ |
| 35 | you have. You must make sure that they, too, receive or can get the␊ |
| 36 | source code. And you must show them these terms so they know their␊ |
| 37 | rights.␊ |
| 38 | ␊ |
| 39 | We protect your rights with two steps: (1) copyright the software, and␊ |
| 40 | (2) offer you this license which gives you legal permission to copy,␊ |
| 41 | distribute and/or modify the software.␊ |
| 42 | ␊ |
| 43 | Also, for each author's protection and ours, we want to make certain␊ |
| 44 | that everyone understands that there is no warranty for this free␊ |
| 45 | software. If the software is modified by someone else and passed on, we␊ |
| 46 | want its recipients to know that what they have is not the original, so␊ |
| 47 | that any problems introduced by others will not reflect on the original␊ |
| 48 | authors' reputations.␊ |
| 49 | ␊ |
| 50 | Finally, any free program is threatened constantly by software␊ |
| 51 | patents. We wish to avoid the danger that redistributors of a free␊ |
| 52 | program will individually obtain patent licenses, in effect making the␊ |
| 53 | program proprietary. To prevent this, we have made it clear that any␊ |
| 54 | patent must be licensed for everyone's free use or not licensed at all.␊ |
| 55 | ␊ |
| 56 | The precise terms and conditions for copying, distribution and␊ |
| 57 | modification follow.␊ |
| 58 | ␊ |
| 59 | ␉␉ GNU GENERAL PUBLIC LICENSE␊ |
| 60 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION␊ |
| 61 | ␊ |
| 62 | 0. This License applies to any program or other work which contains␊ |
| 63 | a notice placed by the copyright holder saying it may be distributed␊ |
| 64 | under the terms of this General Public License. The "Program", below,␊ |
| 65 | refers to any such program or work, and a "work based on the Program"␊ |
| 66 | means either the Program or any derivative work under copyright law:␊ |
| 67 | that is to say, a work containing the Program or a portion of it,␊ |
| 68 | either verbatim or with modifications and/or translated into another␊ |
| 69 | language. (Hereinafter, translation is included without limitation in␊ |
| 70 | the term "modification".) Each licensee is addressed as "you".␊ |
| 71 | ␊ |
| 72 | Activities other than copying, distribution and modification are not␊ |
| 73 | covered by this License; they are outside its scope. The act of␊ |
| 74 | running the Program is not restricted, and the output from the Program␊ |
| 75 | is covered only if its contents constitute a work based on the␊ |
| 76 | Program (independent of having been made by running the Program).␊ |
| 77 | Whether that is true depends on what the Program does.␊ |
| 78 | ␊ |
| 79 | 1. You may copy and distribute verbatim copies of the Program's␊ |
| 80 | source code as you receive it, in any medium, provided that you␊ |
| 81 | conspicuously and appropriately publish on each copy an appropriate␊ |
| 82 | copyright notice and disclaimer of warranty; keep intact all the␊ |
| 83 | notices that refer to this License and to the absence of any warranty;␊ |
| 84 | and give any other recipients of the Program a copy of this License␊ |
| 85 | along with the Program.␊ |
| 86 | ␊ |
| 87 | You may charge a fee for the physical act of transferring a copy, and␊ |
| 88 | you may at your option offer warranty protection in exchange for a fee.␊ |
| 89 | ␊ |
| 90 | 2. You may modify your copy or copies of the Program or any portion␊ |
| 91 | of it, thus forming a work based on the Program, and copy and␊ |
| 92 | distribute such modifications or work under the terms of Section 1␊ |
| 93 | above, provided that you also meet all of these conditions:␊ |
| 94 | ␊ |
| 95 | a) You must cause the modified files to carry prominent notices␊ |
| 96 | stating that you changed the files and the date of any change.␊ |
| 97 | ␊ |
| 98 | b) You must cause any work that you distribute or publish, that in␊ |
| 99 | whole or in part contains or is derived from the Program or any␊ |
| 100 | part thereof, to be licensed as a whole at no charge to all third␊ |
| 101 | parties under the terms of this License.␊ |
| 102 | ␊ |
| 103 | c) If the modified program normally reads commands interactively␊ |
| 104 | when run, you must cause it, when started running for such␊ |
| 105 | interactive use in the most ordinary way, to print or display an␊ |
| 106 | announcement including an appropriate copyright notice and a␊ |
| 107 | notice that there is no warranty (or else, saying that you provide␊ |
| 108 | a warranty) and that users may redistribute the program under␊ |
| 109 | these conditions, and telling the user how to view a copy of this␊ |
| 110 | License. (Exception: if the Program itself is interactive but␊ |
| 111 | does not normally print such an announcement, your work based on␊ |
| 112 | the Program is not required to print an announcement.)␊ |
| 113 | ␊ |
| 114 | These requirements apply to the modified work as a whole. If␊ |
| 115 | identifiable sections of that work are not derived from the Program,␊ |
| 116 | and can be reasonably considered independent and separate works in␊ |
| 117 | themselves, then this License, and its terms, do not apply to those␊ |
| 118 | sections when you distribute them as separate works. But when you␊ |
| 119 | distribute the same sections as part of a whole which is a work based␊ |
| 120 | on the Program, the distribution of the whole must be on the terms of␊ |
| 121 | this License, whose permissions for other licensees extend to the␊ |
| 122 | entire whole, and thus to each and every part regardless of who wrote it.␊ |
| 123 | ␊ |
| 124 | Thus, it is not the intent of this section to claim rights or contest␊ |
| 125 | your rights to work written entirely by you; rather, the intent is to␊ |
| 126 | exercise the right to control the distribution of derivative or␊ |
| 127 | collective works based on the Program.␊ |
| 128 | ␊ |
| 129 | In addition, mere aggregation of another work not based on the Program␊ |
| 130 | with the Program (or with a work based on the Program) on a volume of␊ |
| 131 | a storage or distribution medium does not bring the other work under␊ |
| 132 | the scope of this License.␊ |
| 133 | ␊ |
| 134 | 3. You may copy and distribute the Program (or a work based on it,␊ |
| 135 | under Section 2) in object code or executable form under the terms of␊ |
| 136 | Sections 1 and 2 above provided that you also do one of the following:␊ |
| 137 | ␊ |
| 138 | a) Accompany it with the complete corresponding machine-readable␊ |
| 139 | source code, which must be distributed under the terms of Sections␊ |
| 140 | 1 and 2 above on a medium customarily used for software interchange; or,␊ |
| 141 | ␊ |
| 142 | b) Accompany it with a written offer, valid for at least three␊ |
| 143 | years, to give any third party, for a charge no more than your␊ |
| 144 | cost of physically performing source distribution, a complete␊ |
| 145 | machine-readable copy of the corresponding source code, to be␊ |
| 146 | distributed under the terms of Sections 1 and 2 above on a medium␊ |
| 147 | customarily used for software interchange; or,␊ |
| 148 | ␊ |
| 149 | c) Accompany it with the information you received as to the offer␊ |
| 150 | to distribute corresponding source code. (This alternative is␊ |
| 151 | allowed only for noncommercial distribution and only if you␊ |
| 152 | received the program in object code or executable form with such␊ |
| 153 | an offer, in accord with Subsection b above.)␊ |
| 154 | ␊ |
| 155 | The source code for a work means the preferred form of the work for␊ |
| 156 | making modifications to it. For an executable work, complete source␊ |
| 157 | code means all the source code for all modules it contains, plus any␊ |
| 158 | associated interface definition files, plus the scripts used to␊ |
| 159 | control compilation and installation of the executable. However, as a␊ |
| 160 | special exception, the source code distributed need not include␊ |
| 161 | anything that is normally distributed (in either source or binary␊ |
| 162 | form) with the major components (compiler, kernel, and so on) of the␊ |
| 163 | operating system on which the executable runs, unless that component␊ |
| 164 | itself accompanies the executable.␊ |
| 165 | ␊ |
| 166 | If distribution of executable or object code is made by offering␊ |
| 167 | access to copy from a designated place, then offering equivalent␊ |
| 168 | access to copy the source code from the same place counts as␊ |
| 169 | distribution of the source code, even though third parties are not␊ |
| 170 | compelled to copy the source along with the object code.␊ |
| 171 | ␊ |
| 172 | 4. You may not copy, modify, sublicense, or distribute the Program␊ |
| 173 | except as expressly provided under this License. Any attempt␊ |
| 174 | otherwise to copy, modify, sublicense or distribute the Program is␊ |
| 175 | void, and will automatically terminate your rights under this License.␊ |
| 176 | However, parties who have received copies, or rights, from you under␊ |
| 177 | this License will not have their licenses terminated so long as such␊ |
| 178 | parties remain in full compliance.␊ |
| 179 | ␊ |
| 180 | 5. You are not required to accept this License, since you have not␊ |
| 181 | signed it. However, nothing else grants you permission to modify or␊ |
| 182 | distribute the Program or its derivative works. These actions are␊ |
| 183 | prohibited by law if you do not accept this License. Therefore, by␊ |
| 184 | modifying or distributing the Program (or any work based on the␊ |
| 185 | Program), you indicate your acceptance of this License to do so, and␊ |
| 186 | all its terms and conditions for copying, distributing or modifying␊ |
| 187 | the Program or works based on it.␊ |
| 188 | ␊ |
| 189 | 6. Each time you redistribute the Program (or any work based on the␊ |
| 190 | Program), the recipient automatically receives a license from the␊ |
| 191 | original licensor to copy, distribute or modify the Program subject to␊ |
| 192 | these terms and conditions. You may not impose any further␊ |
| 193 | restrictions on the recipients' exercise of the rights granted herein.␊ |
| 194 | You are not responsible for enforcing compliance by third parties to␊ |
| 195 | this License.␊ |
| 196 | ␊ |
| 197 | 7. If, as a consequence of a court judgment or allegation of patent␊ |
| 198 | infringement or for any other reason (not limited to patent issues),␊ |
| 199 | conditions are imposed on you (whether by court order, agreement or␊ |
| 200 | otherwise) that contradict the conditions of this License, they do not␊ |
| 201 | excuse you from the conditions of this License. If you cannot␊ |
| 202 | distribute so as to satisfy simultaneously your obligations under this␊ |
| 203 | License and any other pertinent obligations, then as a consequence you␊ |
| 204 | may not distribute the Program at all. For example, if a patent␊ |
| 205 | license would not permit royalty-free redistribution of the Program by␊ |
| 206 | all those who receive copies directly or indirectly through you, then␊ |
| 207 | the only way you could satisfy both it and this License would be to␊ |
| 208 | refrain entirely from distribution of the Program.␊ |
| 209 | ␊ |
| 210 | If any portion of this section is held invalid or unenforceable under␊ |
| 211 | any particular circumstance, the balance of the section is intended to␊ |
| 212 | apply and the section as a whole is intended to apply in other␊ |
| 213 | circumstances.␊ |
| 214 | ␊ |
| 215 | It is not the purpose of this section to induce you to infringe any␊ |
| 216 | patents or other property right claims or to contest validity of any␊ |
| 217 | such claims; this section has the sole purpose of protecting the␊ |
| 218 | integrity of the free software distribution system, which is␊ |
| 219 | implemented by public license practices. Many people have made␊ |
| 220 | generous contributions to the wide range of software distributed␊ |
| 221 | through that system in reliance on consistent application of that␊ |
| 222 | system; it is up to the author/donor to decide if he or she is willing␊ |
| 223 | to distribute software through any other system and a licensee cannot␊ |
| 224 | impose that choice.␊ |
| 225 | ␊ |
| 226 | This section is intended to make thoroughly clear what is believed to␊ |
| 227 | be a consequence of the rest of this License.␊ |
| 228 | ␌␊ |
| 229 | 8. If the distribution and/or use of the Program is restricted in␊ |
| 230 | certain countries either by patents or by copyrighted interfaces, the␊ |
| 231 | original copyright holder who places the Program under this License␊ |
| 232 | may add an explicit geographical distribution limitation excluding␊ |
| 233 | those countries, so that distribution is permitted only in or among␊ |
| 234 | countries not thus excluded. In such case, this License incorporates␊ |
| 235 | the limitation as if written in the body of this License.␊ |
| 236 | ␊ |
| 237 | 9. The Free Software Foundation may publish revised and/or new versions␊ |
| 238 | of the General Public License from time to time. Such new versions will␊ |
| 239 | be similar in spirit to the present version, but may differ in detail to␊ |
| 240 | address new problems or concerns.␊ |
| 241 | ␊ |
| 242 | Each version is given a distinguishing version number. If the Program␊ |
| 243 | specifies a version number of this License which applies to it and "any␊ |
| 244 | later version", you have the option of following the terms and conditions␊ |
| 245 | either of that version or of any later version published by the Free␊ |
| 246 | Software Foundation. If the Program does not specify a version number of␊ |
| 247 | this License, you may choose any version ever published by the Free Software␊ |
| 248 | Foundation.␊ |
| 249 | ␊ |
| 250 | 10. If you wish to incorporate parts of the Program into other free␊ |
| 251 | programs whose distribution conditions are different, write to the author␊ |
| 252 | to ask for permission. For software which is copyrighted by the Free␊ |
| 253 | Software Foundation, write to the Free Software Foundation; we sometimes␊ |
| 254 | make exceptions for this. Our decision will be guided by the two goals␊ |
| 255 | of preserving the free status of all derivatives of our free software and␊ |
| 256 | of promoting the sharing and reuse of software generally.␊ |
| 257 | ␊ |
| 258 | ␉␉␉ NO WARRANTY␊ |
| 259 | ␊ |
| 260 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY␊ |
| 261 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN␊ |
| 262 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES␊ |
| 263 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED␊ |
| 264 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF␊ |
| 265 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS␊ |
| 266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE␊ |
| 267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,␊ |
| 268 | REPAIR OR CORRECTION.␊ |
| 269 | ␊ |
| 270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING␊ |
| 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR␊ |
| 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,␊ |
| 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING␊ |
| 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED␊ |
| 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY␊ |
| 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER␊ |
| 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE␊ |
| 278 | POSSIBILITY OF SUCH DAMAGES.␊ |
| 279 | ␊ |
| 280 | ␉␉ END OF TERMS AND CONDITIONS␊ |
| 281 | |
