J. Duke | 74f4779 | 2007-12-01 00:00:00 +0000 | [diff] [blame] | 1 | The GNU General Public License (GPL) |
| 2 | |
| 3 | Version 2, June 1991 |
| 4 | |
| 5 | Copyright (C) 1989, 1991 Free Software Foundation, Inc. |
| 6 | 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 7 | |
| 8 | Everyone is permitted to copy and distribute verbatim copies of this license |
| 9 | document, but changing it is not allowed. |
| 10 | |
| 11 | Preamble |
| 12 | |
| 13 | The licenses for most software are designed to take away your freedom to share |
| 14 | and change it. By contrast, the GNU General Public License is intended to |
| 15 | guarantee your freedom to share and change free software--to make sure the |
| 16 | software is free for all its users. This General Public License applies to |
| 17 | most of the Free Software Foundation's software and to any other program whose |
| 18 | authors commit to using it. (Some other Free Software Foundation software is |
| 19 | covered by the GNU Library General Public License instead.) You can apply it to |
| 20 | your programs, too. |
| 21 | |
| 22 | When we speak of free software, we are referring to freedom, not price. Our |
| 23 | General Public Licenses are designed to make sure that you have the freedom to |
| 24 | distribute copies of free software (and charge for this service if you wish), |
| 25 | that you receive source code or can get it if you want it, that you can change |
| 26 | the software or use pieces of it in new free programs; and that you know you |
| 27 | can do these things. |
| 28 | |
| 29 | To protect your rights, we need to make restrictions that forbid anyone to deny |
| 30 | you these rights or to ask you to surrender the rights. These restrictions |
| 31 | translate to certain responsibilities for you if you distribute copies of the |
| 32 | software, or if you modify it. |
| 33 | |
| 34 | For example, if you distribute copies of such a program, whether gratis or for |
| 35 | a fee, you must give the recipients all the rights that you have. You must |
| 36 | make sure that they, too, receive or can get the source code. And you must |
| 37 | show them these terms so they know their rights. |
| 38 | |
| 39 | We protect your rights with two steps: (1) copyright the software, and (2) |
| 40 | offer you this license which gives you legal permission to copy, distribute |
| 41 | and/or modify the software. |
| 42 | |
| 43 | Also, for each author's protection and ours, we want to make certain that |
| 44 | everyone understands that there is no warranty for this free software. If the |
| 45 | software is modified by someone else and passed on, we want its recipients to |
| 46 | know that what they have is not the original, so that any problems introduced |
| 47 | by others will not reflect on the original authors' reputations. |
| 48 | |
| 49 | Finally, any free program is threatened constantly by software patents. We |
| 50 | wish to avoid the danger that redistributors of a free program will |
| 51 | individually obtain patent licenses, in effect making the program proprietary. |
| 52 | To prevent this, we have made it clear that any patent must be licensed for |
| 53 | everyone's free use or not licensed at all. |
| 54 | |
| 55 | The precise terms and conditions for copying, distribution and modification |
| 56 | follow. |
| 57 | |
| 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 terms of |
| 62 | this General Public License. The "Program", below, refers to any such program |
| 63 | or work, and a "work based on the Program" means either the Program or any |
| 64 | derivative work under copyright law: that is to say, a work containing the |
| 65 | Program or a portion of it, either verbatim or with modifications and/or |
| 66 | translated into another language. (Hereinafter, translation is included |
| 67 | without limitation in the term "modification".) Each licensee is addressed as |
| 68 | "you". |
| 69 | |
| 70 | Activities other than copying, distribution and modification are not covered by |
| 71 | 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 by |
| 74 | running the Program). Whether that is true depends on what the Program does. |
| 75 | |
| 76 | 1. You may copy and distribute verbatim copies of the Program's source code as |
| 77 | you receive it, in any medium, provided that you conspicuously and |
| 78 | appropriately publish on each copy an appropriate copyright notice and |
| 79 | disclaimer of warranty; keep intact all the notices that refer to this License |
| 80 | and to the absence of any warranty; and give any other recipients of the |
| 81 | Program a copy of this License along with the Program. |
| 82 | |
| 83 | You may charge a fee for the physical act of transferring a copy, and you may |
| 84 | at your option offer warranty protection in exchange for a fee. |
| 85 | |
| 86 | 2. You may modify your copy or copies of the Program or any portion of it, thus |
| 87 | forming a work based on the Program, and copy and distribute such modifications |
| 88 | or work under the terms of Section 1 above, provided that you also meet all of |
| 89 | these conditions: |
| 90 | |
| 91 | a) You must cause the modified files to carry prominent notices stating |
| 92 | that you changed the files and the date of any change. |
| 93 | |
| 94 | b) You must cause any work that you distribute or publish, that in whole or |
| 95 | in part contains or is derived from the Program or any part thereof, to be |
| 96 | licensed as a whole at no charge to all third parties under the terms of |
| 97 | this License. |
| 98 | |
| 99 | c) If the modified program normally reads commands interactively when run, |
| 100 | you must cause it, when started running for such interactive use in the |
| 101 | most ordinary way, to print or display an announcement including an |
| 102 | appropriate copyright notice and a notice that there is no warranty (or |
| 103 | else, saying that you provide a warranty) and that users may redistribute |
| 104 | the program under these conditions, and telling the user how to view a copy |
| 105 | of this License. (Exception: if the Program itself is interactive but does |
| 106 | not normally print such an announcement, your work based on the Program is |
| 107 | not required to print an announcement.) |
| 108 | |
| 109 | These requirements apply to the modified work as a whole. If identifiable |
| 110 | sections of that work are not derived from the Program, and can be reasonably |
| 111 | considered independent and separate works in themselves, then this License, and |
| 112 | its terms, do not apply to those sections when you distribute them as separate |
| 113 | works. But when you distribute the same sections as part of a whole which is a |
| 114 | work based on the Program, the distribution of the whole must be on the terms |
| 115 | of this License, whose permissions for other licensees extend to the entire |
| 116 | whole, and thus to each and every part regardless of who wrote it. |
| 117 | |
| 118 | Thus, it is not the intent of this section to claim rights or contest your |
| 119 | rights to work written entirely by you; rather, the intent is to exercise the |
| 120 | right to control the distribution of derivative or collective works based on |
| 121 | the Program. |
| 122 | |
| 123 | In addition, mere aggregation of another work not based on the Program with the |
| 124 | Program (or with a work based on the Program) on a volume of a storage or |
| 125 | distribution medium does not bring the other work under the scope of this |
| 126 | License. |
| 127 | |
| 128 | 3. You may copy and distribute the Program (or a work based on it, under |
| 129 | Section 2) in object code or executable form under the terms of Sections 1 and |
| 130 | 2 above provided that you also do one of the following: |
| 131 | |
| 132 | a) Accompany it with the complete corresponding machine-readable source |
| 133 | code, which must be distributed under the terms of Sections 1 and 2 above |
| 134 | on a medium customarily used for software interchange; or, |
| 135 | |
| 136 | b) Accompany it with a written offer, valid for at least three years, to |
| 137 | give any third party, for a charge no more than your cost of physically |
| 138 | performing source distribution, a complete machine-readable copy of the |
| 139 | corresponding source code, to be distributed under the terms of Sections 1 |
| 140 | and 2 above on a medium customarily used for software interchange; or, |
| 141 | |
| 142 | c) Accompany it with the information you received as to the offer to |
| 143 | distribute corresponding source code. (This alternative is allowed only |
| 144 | for noncommercial distribution and only if you received the program in |
| 145 | object code or executable form with such an offer, in accord with |
| 146 | Subsection b above.) |
| 147 | |
| 148 | The source code for a work means the preferred form of the work for making |
| 149 | modifications to it. For an executable work, complete source code means all |
| 150 | the source code for all modules it contains, plus any associated interface |
| 151 | definition files, plus the scripts used to control compilation and installation |
| 152 | of the executable. However, as a special exception, the source code |
| 153 | distributed need not include anything that is normally distributed (in either |
| 154 | source or binary form) with the major components (compiler, kernel, and so on) |
| 155 | of the operating system on which the executable runs, unless that component |
| 156 | itself accompanies the executable. |
| 157 | |
| 158 | If distribution of executable or object code is made by offering access to copy |
| 159 | from a designated place, then offering equivalent access to copy the source |
| 160 | code from the same place counts as distribution of the source code, even though |
| 161 | third parties are not compelled to copy the source along with the object code. |
| 162 | |
| 163 | 4. You may not copy, modify, sublicense, or distribute the Program except as |
| 164 | expressly provided under this License. Any attempt otherwise to copy, modify, |
| 165 | sublicense or distribute the Program is void, and will automatically terminate |
| 166 | your rights under this License. However, parties who have received copies, or |
| 167 | rights, from you under this License will not have their licenses terminated so |
| 168 | long as such parties remain in full compliance. |
| 169 | |
| 170 | 5. You are not required to accept this License, since you have not signed it. |
| 171 | However, nothing else grants you permission to modify or distribute the Program |
| 172 | or its derivative works. These actions are prohibited by law if you do not |
| 173 | accept this License. Therefore, by modifying or distributing the Program (or |
| 174 | any work based on the Program), you indicate your acceptance of this License to |
| 175 | do so, and all its terms and conditions for copying, distributing or modifying |
| 176 | the Program or works based on it. |
| 177 | |
| 178 | 6. Each time you redistribute the Program (or any work based on the Program), |
| 179 | the recipient automatically receives a license from the original licensor to |
| 180 | copy, distribute or modify the Program subject to these terms and conditions. |
| 181 | You may not impose any further restrictions on the recipients' exercise of the |
| 182 | rights granted herein. You are not responsible for enforcing compliance by |
| 183 | third parties to this License. |
| 184 | |
| 185 | 7. If, as a consequence of a court judgment or allegation of patent |
| 186 | infringement or for any other reason (not limited to patent issues), conditions |
| 187 | are imposed on you (whether by court order, agreement or otherwise) that |
| 188 | contradict the conditions of this License, they do not excuse you from the |
| 189 | conditions of this License. If you cannot distribute so as to satisfy |
| 190 | simultaneously your obligations under this License and any other pertinent |
| 191 | obligations, then as a consequence you may not distribute the Program at all. |
| 192 | For example, if a patent license would not permit royalty-free redistribution |
| 193 | of the Program by all those who receive copies directly or indirectly through |
| 194 | you, then the only way you could satisfy both it and this License would be to |
| 195 | refrain entirely from distribution of the Program. |
| 196 | |
| 197 | If any portion of this section is held invalid or unenforceable under any |
| 198 | particular circumstance, the balance of the section is intended to apply and |
| 199 | the section as a whole is intended to apply in other circumstances. |
| 200 | |
| 201 | It is not the purpose of this section to induce you to infringe any patents or |
| 202 | other property right claims or to contest validity of any such claims; this |
| 203 | section has the sole purpose of protecting the integrity of the free software |
| 204 | distribution system, which is implemented by public license practices. Many |
| 205 | people have made generous contributions to the wide range of software |
| 206 | distributed through that system in reliance on consistent application of that |
| 207 | system; it is up to the author/donor to decide if he or she is willing to |
| 208 | distribute software through any other system and a licensee cannot impose that |
| 209 | choice. |
| 210 | |
| 211 | This section is intended to make thoroughly clear what is believed to be a |
| 212 | consequence of the rest of this License. |
| 213 | |
| 214 | 8. If the distribution and/or use of the Program is restricted in certain |
| 215 | countries either by patents or by copyrighted interfaces, the original |
| 216 | copyright holder who places the Program under this License may add an explicit |
| 217 | geographical distribution limitation excluding those countries, so that |
| 218 | distribution is permitted only in or among countries not thus excluded. In |
| 219 | such case, this License incorporates the limitation as if written in the body |
| 220 | of this License. |
| 221 | |
| 222 | 9. The Free Software Foundation may publish revised and/or new versions of the |
| 223 | General Public License from time to time. Such new versions will be similar in |
| 224 | spirit to the present version, but may differ in detail to address new problems |
| 225 | or concerns. |
| 226 | |
| 227 | Each version is given a distinguishing version number. If the Program |
| 228 | specifies a version number of this License which applies to it and "any later |
| 229 | version", you have the option of following the terms and conditions either of |
| 230 | that version or of any later version published by the Free Software Foundation. |
| 231 | If the Program does not specify a version number of this License, you may |
| 232 | choose any version ever published by the Free Software Foundation. |
| 233 | |
| 234 | 10. If you wish to incorporate parts of the Program into other free programs |
| 235 | whose distribution conditions are different, write to the author to ask for |
| 236 | permission. For software which is copyrighted by the Free Software Foundation, |
| 237 | write to the Free Software Foundation; we sometimes make exceptions for this. |
| 238 | Our decision will be guided by the two goals of preserving the free status of |
| 239 | all derivatives of our free software and of promoting the sharing and reuse of |
| 240 | software generally. |
| 241 | |
| 242 | NO WARRANTY |
| 243 | |
| 244 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR |
| 245 | THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE |
| 246 | STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE |
| 247 | PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, |
| 248 | INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 249 | FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND |
| 250 | PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, |
| 251 | YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. |
| 252 | |
| 253 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL |
| 254 | ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE |
| 255 | PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY |
| 256 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR |
| 257 | INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA |
| 258 | BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
| 259 | FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER |
| 260 | OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. |
| 261 | |
| 262 | END OF TERMS AND CONDITIONS |
| 263 | |
| 264 | How to Apply These Terms to Your New Programs |
| 265 | |
| 266 | If you develop a new program, and you want it to be of the greatest possible |
| 267 | use to the public, the best way to achieve this is to make it free software |
| 268 | which everyone can redistribute and change under these terms. |
| 269 | |
| 270 | To do so, attach the following notices to the program. It is safest to attach |
| 271 | them to the start of each source file to most effectively convey the exclusion |
| 272 | of warranty; and each file should have at least the "copyright" line and a |
| 273 | pointer to where the full notice is found. |
| 274 | |
| 275 | One line to give the program's name and a brief idea of what it does. |
| 276 | |
| 277 | Copyright (C) <year> <name of author> |
| 278 | |
| 279 | This program is free software; you can redistribute it and/or modify it |
| 280 | under the terms of the GNU General Public License as published by the Free |
| 281 | Software Foundation; either version 2 of the License, or (at your option) |
| 282 | any later version. |
| 283 | |
| 284 | This program is distributed in the hope that it will be useful, but WITHOUT |
| 285 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 286 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 287 | more details. |
| 288 | |
| 289 | You should have received a copy of the GNU General Public License along |
| 290 | with this program; if not, write to the Free Software Foundation, Inc., 59 |
| 291 | Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 292 | |
| 293 | Also add information on how to contact you by electronic and paper mail. |
| 294 | |
| 295 | If the program is interactive, make it output a short notice like this when it |
| 296 | starts in an interactive mode: |
| 297 | |
| 298 | Gnomovision version 69, Copyright (C) year name of author Gnomovision comes |
| 299 | with ABSOLUTELY NO WARRANTY; for details type 'show w'. This is free |
| 300 | software, and you are welcome to redistribute it under certain conditions; |
| 301 | type 'show c' for details. |
| 302 | |
| 303 | The hypothetical commands 'show w' and 'show c' should show the appropriate |
| 304 | parts of the General Public License. Of course, the commands you use may be |
| 305 | called something other than 'show w' and 'show c'; they could even be |
| 306 | mouse-clicks or menu items--whatever suits your program. |
| 307 | |
| 308 | You should also get your employer (if you work as a programmer) or your school, |
| 309 | if any, to sign a "copyright disclaimer" for the program, if necessary. Here |
| 310 | is a sample; alter the names: |
| 311 | |
| 312 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program |
| 313 | 'Gnomovision' (which makes passes at compilers) written by James Hacker. |
| 314 | |
| 315 | signature of Ty Coon, 1 April 1989 |
| 316 | |
| 317 | Ty Coon, President of Vice |
| 318 | |
| 319 | This General Public License does not permit incorporating your program into |
| 320 | proprietary programs. If your program is a subroutine library, you may |
| 321 | consider it more useful to permit linking proprietary applications with the |
| 322 | library. If this is what you want to do, use the GNU Library General Public |
| 323 | License instead of this License. |
| 324 | |
| 325 | |
| 326 | "CLASSPATH" EXCEPTION TO THE GPL |
| 327 | |
| 328 | Certain source files distributed by Sun Microsystems, Inc. are subject to |
| 329 | the following clarification and special exception to the GPL, but only where |
| 330 | Sun has expressly included in the particular source file's header the words |
| 331 | "Sun designates this particular file as subject to the "Classpath" exception |
| 332 | as provided by Sun in the LICENSE file that accompanied this code." |
| 333 | |
| 334 | Linking this library statically or dynamically with other modules is making |
| 335 | a combined work based on this library. Thus, the terms and conditions of |
| 336 | the GNU General Public License cover the whole combination. |
| 337 | |
| 338 | As a special exception, the copyright holders of this library give you |
| 339 | permission to link this library with independent modules to produce an |
| 340 | executable, regardless of the license terms of these independent modules, |
| 341 | and to copy and distribute the resulting executable under terms of your |
| 342 | choice, provided that you also meet, for each linked independent module, |
| 343 | the terms and conditions of the license of that module. An independent |
| 344 | module is a module which is not derived from or based on this library. If |
| 345 | you modify this library, you may extend this exception to your version of |
| 346 | the library, but you are not obligated to do so. If you do not wish to do |
| 347 | so, delete this exception statement from your version. |