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| 1 | +GNU GENERAL PUBLIC LICENSE |
| 2 | + |
| 3 | + Version 2, June 1991 |
| 4 | + |
| 5 | +Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave, |
| 6 | +Cambridge, MA 02139, USA. Everyone is permitted to copy and distribute |
| 7 | +verbatim copies 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 freedom to |
| 12 | +share and change it. By contrast, the GNU General Public License is |
| 13 | +intended to guarantee your freedom to share and change free software--to |
| 14 | +make sure the software is free for all its users. This General Public License |
| 15 | +applies to most of the Free Software Foundation's software and to any other |
| 16 | +program whose authors commit to using it. (Some other Free Software |
| 17 | +Foundation software is covered by the GNU Library General Public License |
| 18 | +instead.) You can apply it to your programs, too. |
| 19 | + |
| 20 | +When we speak of free software, we are referring to freedom, not price. Our |
| 21 | +General Public Licenses are designed to make sure that you have the |
| 22 | +freedom to distribute copies of free software (and charge for this service if |
| 23 | +you wish), that you receive source code or can get it if you want it, that you |
| 24 | +can change the software or use pieces of it in new free programs; and that |
| 25 | +you know you can do these things. |
| 26 | + |
| 27 | +To protect your rights, we need to make restrictions that forbid anyone to |
| 28 | +deny you these rights or to ask you to surrender the rights. These restrictions |
| 29 | +translate to certain responsibilities for you if you distribute copies of the |
| 30 | +software, or if you modify it. |
| 31 | + |
| 32 | +For example, if you distribute copies of such a program, whether gratis or for |
| 33 | +a fee, you must give the recipients all the rights that you have. You must make |
| 34 | +sure that they, too, receive or can get the source code. And you must show |
| 35 | +them these terms so they know their rights. |
| 36 | + |
| 37 | +We protect your rights with two steps: (1) copyright the software, and (2) |
| 38 | +offer you this license which gives you legal permission to copy, distribute |
| 39 | +and/or modify the software. |
| 40 | + |
| 41 | +Also, for each author's protection and ours, we want to make certain that |
| 42 | +everyone understands that there is no warranty for this free software. If the |
| 43 | +software is modified by someone else and passed on, we want its recipients |
| 44 | +to know that what they have is not the original, so that any problems |
| 45 | +introduced by others will not reflect on the original authors' reputations. |
| 46 | + |
| 47 | +Finally, any free program is threatened constantly by software patents. We |
| 48 | +wish to avoid the danger that redistributors of a free program will individually |
| 49 | +obtain patent licenses, in effect making the program proprietary. To prevent |
| 50 | +this, we have made it clear that any patent must be licensed for everyone's |
| 51 | +free use or not licensed at all. |
| 52 | + |
| 53 | +The precise terms and conditions for copying, distribution and modification |
| 54 | +follow. |
| 55 | + |
| 56 | + GNU GENERAL PUBLIC LICENSE |
| 57 | + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND |
| 58 | + MODIFICATION |
| 59 | + |
| 60 | +0. This License applies to any program or other work which contains a notice |
| 61 | +placed by the copyright holder saying it may be distributed under the terms |
| 62 | +of this General Public License. The "Program", below, refers to any such |
| 63 | +program or work, and a "work based on the Program" means either the |
| 64 | +Program or any derivative work under copyright law: that is to say, a work |
| 65 | +containing the Program or a portion of it, either verbatim or with |
| 66 | +modifications and/or translated into another language. (Hereinafter, translation |
| 67 | +is included without limitation in the term "modification".) Each licensee is |
| 68 | +addressed as "you". |
| 69 | + |
| 70 | +Activities other than copying, distribution and modification are not covered |
| 71 | +by this License; they are outside its scope. The act of running the Program is |
| 72 | +not restricted, and the output from the Program is covered only if its contents |
| 73 | +constitute a work based on the Program (independent of having been made |
| 74 | +by running the Program). Whether that is true depends on what the Program |
| 75 | +does. |
| 76 | + |
| 77 | +1. You may copy and distribute verbatim copies of the Program's source |
| 78 | +code as you receive it, in any medium, provided that you conspicuously and |
| 79 | +appropriately publish on each copy an appropriate copyright notice and |
| 80 | +disclaimer of warranty; keep intact all the notices that refer to this License |
| 81 | +and to the absence of any warranty; and give any other recipients of the |
| 82 | +Program a copy of this License along with the Program. |
| 83 | + |
| 84 | +You may charge a fee for the physical act of transferring a copy, and you |
| 85 | +may at your option offer warranty protection in exchange for a fee. |
| 86 | + |
| 87 | +2. You may modify your copy or copies of the Program or any portion of it, |
| 88 | +thus forming a work based on the Program, and copy and distribute such |
| 89 | +modifications or work under the terms of Section 1 above, provided that you |
| 90 | +also meet all of these conditions: |
| 91 | + |
| 92 | +a) You must cause the modified files to carry prominent notices stating that |
| 93 | +you changed the files and the date of any change. |
| 94 | + |
| 95 | +b) You must cause any work that you distribute or publish, that in whole or in |
| 96 | +part contains or is derived from the Program or any part thereof, to be |
| 97 | +licensed as a whole at no charge to all third parties under the terms of this |
| 98 | +License. |
| 99 | + |
| 100 | +c) If the modified program normally reads commands interactively when run, |
| 101 | +you must cause it, when started running for such interactive use in the most |
| 102 | +ordinary way, to print or display an announcement including an appropriate |
| 103 | +copyright notice and a notice that there is no warranty (or else, saying that |
| 104 | +you provide a warranty) and that users may redistribute the program under |
| 105 | +these conditions, and telling the user how to view a copy of this License. |
| 106 | +(Exception: if the Program itself is interactive but does not normally print such |
| 107 | +an announcement, your work based on the Program is not required to print |
| 108 | +an announcement.) |
| 109 | + |
| 110 | +These requirements apply to the modified work as a whole. If identifiable |
| 111 | +sections of that work are not derived from the Program, and can be |
| 112 | +reasonably considered independent and separate works in themselves, then |
| 113 | +this License, and its terms, do not apply to those sections when you distribute |
| 114 | +them as separate works. But when you distribute the same sections as part |
| 115 | +of a whole which is a work based on the Program, the distribution of the |
| 116 | +whole must be on the terms of this License, whose permissions for other |
| 117 | +licensees extend to the entire whole, and thus to each and every part |
| 118 | +regardless of who wrote it. |
| 119 | + |
| 120 | +Thus, it is not the intent of this section to claim rights or contest your rights to |
| 121 | +work written entirely by you; rather, the intent is to exercise the right to |
| 122 | +control the distribution of derivative or collective works based on the |
| 123 | +Program. |
| 124 | + |
| 125 | +In addition, mere aggregation of another work not based on the Program |
| 126 | +with the Program (or with a work based on the Program) on a volume of a |
| 127 | +storage or distribution medium does not bring the other work under the scope |
| 128 | +of this License. |
| 129 | + |
| 130 | +3. You may copy and distribute the Program (or a work based on it, under |
| 131 | +Section 2) in object code or executable form under the terms of Sections 1 |
| 132 | +and 2 above provided that you also do one of the following: |
| 133 | + |
| 134 | +a) Accompany it with the complete corresponding machine-readable source |
| 135 | +code, which must be distributed under the terms of Sections 1 and 2 above |
| 136 | +on a medium customarily used for software interchange; or, |
| 137 | + |
| 138 | +b) Accompany it with a written offer, valid for at least three years, to give |
| 139 | +any third party, for a charge no more than your cost of physically performing |
| 140 | +source distribution, a complete machine-readable copy of the corresponding |
| 141 | +source code, to be distributed under the terms of Sections 1 and 2 above on |
| 142 | +a medium customarily used for software interchange; or, |
| 143 | + |
| 144 | +c) Accompany it with the information you received as to the offer to distribute |
| 145 | +corresponding source code. (This alternative is allowed only for |
| 146 | +noncommercial distribution and only if you received the program in object |
| 147 | +code or executable form with such an offer, in accord with Subsection b |
| 148 | +above.) |
| 149 | + |
| 150 | +The source code for a work means the preferred form of the work for |
| 151 | +making modifications to it. For an executable work, complete source code |
| 152 | +means all the source code for all modules it contains, plus any associated |
| 153 | +interface definition files, plus the scripts used to control compilation and |
| 154 | +installation of the executable. However, as a special exception, the source |
| 155 | +code distributed need not include anything that is normally distributed (in |
| 156 | +either source or binary form) with the major components (compiler, kernel, |
| 157 | +and so on) of the operating system on which the executable runs, unless that |
| 158 | +component itself accompanies the executable. |
| 159 | + |
| 160 | +If distribution of executable or object code is made by offering access to |
| 161 | +copy from a designated place, then offering equivalent access to copy the |
| 162 | +source code from the same place counts as distribution of the source code, |
| 163 | +even though third parties are not compelled to copy the source along with the |
| 164 | +object code. |
| 165 | + |
| 166 | +4. You may not copy, modify, sublicense, or distribute the Program except as |
| 167 | +expressly provided under this License. Any attempt otherwise to copy, |
| 168 | +modify, sublicense or distribute the Program is void, and will automatically |
| 169 | +terminate your rights under this License. However, parties who have received |
| 170 | +copies, or rights, from you under this License will not have their licenses |
| 171 | +terminated so long as such parties remain in full compliance. |
| 172 | + |
| 173 | +5. You are not required to accept this License, since you have not signed it. |
| 174 | +However, nothing else grants you permission to modify or distribute the |
| 175 | +Program or its derivative works. These actions are prohibited by law if you |
| 176 | +do not accept this License. Therefore, by modifying or distributing the |
| 177 | +Program (or any work based on the Program), you indicate your acceptance |
| 178 | +of this License to do so, and all its terms and conditions for copying, |
| 179 | +distributing or modifying the Program or works based on it. |
| 180 | + |
| 181 | +6. Each time you redistribute the Program (or any work based on the |
| 182 | +Program), the recipient automatically receives a license from the original |
| 183 | +licensor to copy, distribute or modify the Program subject to these terms and |
| 184 | +conditions. You may not impose any further restrictions on the recipients' |
| 185 | +exercise of the rights granted herein. You are not responsible for enforcing |
| 186 | +compliance by third parties to this License. |
| 187 | + |
| 188 | +7. If, as a consequence of a court judgment or allegation of patent |
| 189 | +infringement or for any other reason (not limited to patent issues), conditions |
| 190 | +are imposed on you (whether by court order, agreement or otherwise) that |
| 191 | +contradict the conditions of this License, they do not excuse you from the |
| 192 | +conditions of this License. If you cannot distribute so as to satisfy |
| 193 | +simultaneously your obligations under this License and any other pertinent |
| 194 | +obligations, then as a consequence you may not distribute the Program at all. |
| 195 | +For example, if a patent license would not permit royalty-free redistribution |
| 196 | +of the Program by all those who receive copies directly or indirectly through |
| 197 | +you, then the only way you could satisfy both it and this License would be to |
| 198 | +refrain entirely from distribution of the Program. |
| 199 | + |
| 200 | +If any portion of this section is held invalid or unenforceable under any |
| 201 | +particular circumstance, the balance of the section is intended to apply and |
| 202 | +the section as a whole is intended to apply in other circumstances. |
| 203 | + |
| 204 | +It is not the purpose of this section to induce you to infringe any patents or |
| 205 | +other property right claims or to contest validity of any such claims; this |
| 206 | +section has the sole purpose of protecting the integrity of the free software |
| 207 | +distribution system, which is implemented by public license practices. Many |
| 208 | +people have made generous contributions to the wide range of software |
| 209 | +distributed through that system in reliance on consistent application of that |
| 210 | +system; it is up to the author/donor to decide if he or she is willing to |
| 211 | +distribute software through any other system and a licensee cannot impose |
| 212 | +that choice. |
| 213 | + |
| 214 | +This section is intended to make thoroughly clear what is believed to be a |
| 215 | +consequence of the rest of this License. |
| 216 | + |
| 217 | +8. If the distribution and/or use of the Program is restricted in certain |
| 218 | +countries either by patents or by copyrighted interfaces, the original copyright |
| 219 | +holder who places the Program under this License may add an explicit |
| 220 | +geographical distribution limitation excluding those countries, so that |
| 221 | +distribution is permitted only in or among countries not thus excluded. In such |
| 222 | +case, this License incorporates the limitation as if written in the body of this |
| 223 | +License. |
| 224 | + |
| 225 | +9. The Free Software Foundation may publish revised and/or new versions |
| 226 | +of the General Public License from time to time. Such new versions will be |
| 227 | +similar in spirit to the present version, but may differ in detail to address new |
| 228 | +problems or concerns. |
| 229 | + |
| 230 | +Each version is given a distinguishing version number. If the Program specifies |
| 231 | +a version number of this License which applies to it and "any later version", |
| 232 | +you have the option of following the terms and conditions either of that |
| 233 | +version or of any later version published by the Free Software Foundation. If |
| 234 | +the Program does not specify a version number of this License, you may |
| 235 | +choose any version ever published by the Free Software Foundation. |
| 236 | + |
| 237 | +10. If you wish to incorporate parts of the Program into other free programs |
| 238 | +whose distribution conditions are different, write to the author to ask for |
| 239 | +permission. For software which is copyrighted by the Free Software |
| 240 | +Foundation, write to the Free Software Foundation; we sometimes make |
| 241 | +exceptions for this. Our decision will be guided by the two goals of |
| 242 | +preserving the free status of all derivatives of our free software and of |
| 243 | +promoting the sharing and reuse of software generally. |
| 244 | + |
| 245 | + NO WARRANTY |
| 246 | + |
| 247 | +11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, |
| 248 | +THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT |
| 249 | +PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE |
| 250 | +STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR |
| 251 | +OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT |
| 252 | +WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, |
| 253 | +INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 254 | +OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 255 | +PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND |
| 256 | +PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE |
| 257 | +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL |
| 258 | +NECESSARY SERVICING, REPAIR OR CORRECTION. |
| 259 | + |
| 260 | +12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR |
| 261 | +AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR |
| 262 | +ANY OTHER PARTY WHO MAY MODIFY AND/OR |
| 263 | +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE |
| 264 | +LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, |
| 265 | +SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES |
| 266 | +ARISING OUT OF THE USE OR INABILITY TO USE THE |
| 267 | +PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA |
| 268 | +OR DATA BEING RENDERED INACCURATE OR LOSSES |
| 269 | +SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE |
| 270 | +PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN |
| 271 | +IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF |
| 272 | +THE POSSIBILITY OF SUCH DAMAGES. |
| 273 | + |
| 274 | + END OF TERMS AND CONDITIONS |
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