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