1 The GNU General Public License (GPL) Version 2, June 1991 2 3 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 4 5 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 6 7 Everyone is permitted to copy and distribute verbatim copies 8 of this license document, but changing it is not allowed. 9 10 Preamble 11 12 The licenses for most software are designed to take away 13 your freedom to share and change it. By contrast, the GNU 14 General Public License is intended to guarantee your freedom 15 to share and change free software--to make sure the software 16 is free for all its users. This General Public License 17 applies to most of the Free Software Foundation's software 18 and to any other program whose authors commit to using it. 19 (Some other Free Software Foundation software is covered by 20 the GNU Library General Public License instead.) You can 21 apply it to your programs, too. When we speak of free 22 software, we are referring to freedom, not price. Our 23 General Public Licenses are designed to make sure that you 24 have the freedom to distribute copies of free software (and 25 charge for this service if you wish), that you receive 26 source code or can get it if you want it, that you can 27 change the software or use pieces of it in new free 28 programs; and that you know you can do these things. To 29 protect your rights, we need to make restrictions that 30 forbid anyone to deny you these rights or to ask you to 31 surrender the rights. These restrictions translate to 32 certain responsibilities for you if you distribute copies of 33 the software, or if you modify it. 34 35 For example, if you distribute copies of such a program, 36 whether gratis or for a fee, you must give the recipients 37 all the rights that you have. You must make sure that they, 38 too, receive or can get the source code. And you must show 39 them these terms so they know their rights. 40 41 We protect your rights with two steps: (1) copyright the 42 software, and (2) offer you this license which gives you 43 legal permission to copy, distribute and/or modify the 44 software. 45 46 Also, for each author's protection and ours, we want to make 47 certain that everyone understands that there is no warranty 48 for this free software. If the software is modified by 49 someone else and passed on, we want its recipients to know 50 that what they have is not the original, so that any 51 problems introduced by others will not reflect on the 52 original authors' reputations. 53 54 Finally, any free program is threatened constantly by 55 software patents. We wish to avoid the danger that 56 redistributors of a free program will individually obtain 57 patent licenses, in effect making the program proprietary. 58 To prevent this, we have made it clear that any patent must 59 be licensed for everyone's free use or not licensed at all. 60 61 The precise terms and conditions for copying, distribution 62 and modification follow. 63 64 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND 65 MODIFICATION 66 67 0. This License applies to any program or other work which 68 contains a notice placed by the copyright holder saying it 69 may be distributed under the terms of this General Public 70 License. The "Program", below, refers to any such program or 71 work, and a "work based on the Program" means either the 72 Program or any derivative work under copyright law: that is 73 to say, a work containing the Program or a portion of it, 74 either verbatim or with modifications and/or translated into 75 another language. (Hereinafter, translation is included 76 without limitation in the term "modification".) Each 77 licensee is addressed as "you". 78 79 Activities other than copying, distribution and modification 80 are not covered by this License; they are outside its scope. 81 The act of running the Program is not restricted, and the 82 output from the Program is covered only if its contents 83 constitute a work based on the Program (independent of 84 having been made by running the Program). Whether that is 85 true depends on what the Program does. 86 87 1. You may copy and distribute verbatim copies of the 88 Program's source code as you receive it, in any medium, 89 provided that you conspicuously and appropriately publish on 90 each copy an appropriate copyright notice and disclaimer of 91 warranty; keep intact all the notices that refer to this 92 License and to the absence of any warranty; and give any 93 other recipients of the Program a copy of this License along 94 with the Program. 95 96 You may charge a fee for the physical act of transferring a 97 copy, and you may at your option offer warranty protection 98 in exchange for a fee. 99 100 2. You may modify your copy or copies of the Program or any 101 portion of it, thus forming a work based on the Program, and 102 copy and distribute such modifications or work under the 103 terms of Section 1 above, provided that you also meet all of 104 these conditions: 105 106 a) You must cause the modified files to carry prominent 107 notices stating that you changed the files and the date of 108 any change. 109 110 b) You must cause any work that you distribute or publish, 111 that in whole or in part contains or is derived from the 112 Program or any part thereof, to be licensed as a whole at no 113 charge to all third parties under the terms of this License. 114 115 c) If the modified program normally reads commands 116 interactively when run, you must cause it, when started 117 running for such interactive use in the most ordinary way, 118 to print or display an announcement including an appropriate 119 copyright notice and a notice that there is no warranty (or 120 else, saying that you provide a warranty) and that users may 121 redistribute the program under these conditions, and telling 122 the user how to view a copy of this License. (Exception: if 123 the Program itself is interactive but does not normally 124 print such an announcement, your work based on the Program 125 is not required to print an announcement.) 126 127 These requirements apply to the modified work as a whole. If 128 identifiable sections of that work are not derived from the 129 Program, and can be reasonably considered independent and 130 separate works in themselves, then this License, and its 131 terms, do not apply to those sections when you distribute 132 them as separate works. But when you distribute the same 133 sections as part of a whole which is a work based on the 134 Program, the distribution of the whole must be on the terms 135 of this License, whose permissions for other licensees 136 extend to the entire whole, and thus to each and every part 137 regardless of who wrote it. 138 139 Thus, it is not the intent of this section to claim rights 140 or contest your rights to work written entirely by you; 141 rather, the intent is to exercise the right to control the 142 distribution of derivative or collective works based on the 143 Program. In addition, mere aggregation of another work not 144 based on the Program with the Program (or with a work based 145 on the Program) on a volume of a storage or distribution 146 medium does not bring the other work under the scope of this 147 License. 148 149 3. You may copy and distribute the Program (or a work based 150 on it, under Section 2) in object code or executable form 151 under the terms of Sections 1 and 2 above provided that you 152 also do one of the following: 153 154 a) Accompany it with the complete corresponding 155 machine-readable source code, which must be distributed 156 under the terms of Sections 1 and 2 above on a medium 157 customarily used for software interchange; or, 158 159 b) Accompany it with a written offer, valid for at least 160 three years, to give any third party, for a charge no more 161 than your cost of physically performing source distribution, 162 a complete machine-readable copy of the corresponding source 163 code, to be distributed under the terms of Sections 1 and 2 164 above on a medium customarily used for software interchange; 165 or, 166 167 c) Accompany it with the information you received as to the 168 offer to distribute corresponding source code. (This 169 alternative is allowed only for noncommercial distribution 170 and only if you received the program in object code or 171 executable form with such an offer, in accord with 172 Subsection b above.) 173 174 The source code for a work means the preferred form of the 175 work for making modifications to it. For an executable work, 176 complete source code means all the source code for all 177 modules it contains, plus any associated interface 178 definition files, plus the scripts used to control 179 compilation and installation of the executable. However, as 180 a special exception, the source code distributed need not 181 include anything that is normally distributed (in either 182 source or binary form) with the major components (compiler, 183 kernel, and so on) of the operating system on which the 184 executable runs, unless that component itself accompanies 185 the executable. If distribution of executable or object code 186 is made by offering access to copy from a designated place, 187 then offering equivalent access to copy the source code from 188 the same place counts as distribution of the source code, 189 even though third parties are not compelled to copy the 190 source along with the object code. 191 192 4. You may not copy, modify, sublicense, or distribute the 193 Program except as expressly provided under this License. Any 194 attempt otherwise to copy, modify, sublicense or distribute 195 the Program is void, and will automatically terminate your 196 rights under this License. However, parties who have 197 received copies, or rights, from you under this License will 198 not have their licenses terminated so long as such parties 199 remain in full compliance. 200 201 5. You are not required to accept this License, since you 202 have not signed it. However, nothing else grants you 203 permission to modify or distribute the Program or its 204 derivative works. These actions are prohibited by law if you 205 do not accept this License. Therefore, by modifying or 206 distributing the Program (or any work based on the Program), 207 you indicate your acceptance of this License to do so, and 208 all its terms and conditions for copying, distributing or 209 modifying the Program or works based on it. 210 211 6. Each time you redistribute the Program (or any work based 212 on the Program), the recipient automatically receives a 213 license from the original licensor to copy, distribute or 214 modify the Program subject to these terms and conditions. 215 You may not impose any further restrictions on the 216 recipients' exercise of the rights granted herein. You are 217 not responsible for enforcing compliance by third parties to 218 this License. 219 220 7. If, as a consequence of a court judgment or allegation of 221 patent infringement or for any other reason (not limited to 222 patent issues), conditions are imposed on you (whether by 223 court order, agreement or otherwise) that contradict the 224 conditions of this License, they do not excuse you from the 225 conditions of this License. If you cannot distribute so as 226 to satisfy simultaneously your obligations under this 227 License and any other pertinent obligations, then as a 228 consequence you may not distribute the Program at all. For 229 example, if a patent license would not permit royalty-free 230 redistribution of the Program by all those who receive 231 copies directly or indirectly through you, then the only way 232 you could satisfy both it and this License would be to 233 refrain entirely from distribution of the Program. 234 235 If any portion of this section is held invalid or 236 unenforceable under any particular circumstance, the balance 237 of the section is intended to apply and the section as a 238 whole is intended to apply in other circumstances. It is not 239 the purpose of this section to induce you to infringe any 240 patents or other property right claims or to contest 241 validity of any such claims; this section has the sole 242 purpose of protecting the integrity of the free software 243 distribution system, which is implemented by public license 244 practices. Many people have made generous contributions to 245 the wide range of software distributed through that system 246 in reliance on consistent application of that system; it is 247 up to the author/donor to decide if he or she is willing to 248 distribute software through any other system and a licensee 249 cannot impose that choice. 250 251 This section is intended to make thoroughly clear what is 252 believed to be a consequence of the rest of this License. 253 254 8. If the distribution and/or use of the Program is 255 restricted in certain countries either by patents or by 256 copyrighted interfaces, the original copyright holder who 257 places the Program under this License may add an explicit 258 geographical distribution limitation excluding those 259 countries, so that distribution is permitted only in or 260 among countries not thus excluded. In such case, this 261 License incorporates the limitation as if written in the 262 body of this License. 263 264 9. The Free Software Foundation may publish revised and/or 265 new versions of the General Public License from time to 266 time. Such new versions will be similar in spirit to the 267 present version, but may differ in detail to address new 268 problems or concerns. 269 270 Each version is given a distinguishing version number. If 271 the Program specifies a version number of this License which 272 applies to it and "any later version", you have the option 273 of following the terms and conditions either of that version 274 or of any later version published by the Free Software 275 Foundation. If the Program does not specify a version number 276 of this License, you may choose any version ever published 277 by the Free Software Foundation. 278 279 10. If you wish to incorporate parts of the Program into 280 other free programs whose distribution conditions are 281 different, write to the author to ask for permission. For 282 software which is copyrighted by the Free Software 283 Foundation, write to the Free Software Foundation; we 284 sometimes make exceptions for this. Our decision will be 285 guided by the two goals of preserving the free status of all 286 derivatives of our free software and of promoting the 287 sharing and reuse of software generally. 288 289 NO WARRANTY 290 291 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS 292 NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 293 APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE 294 COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM 295 "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR 296 IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 297 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 298 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE 299 OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE 300 DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 301 REPAIR OR CORRECTION. 302 303 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED 304 TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY 305 WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED 306 ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, 307 SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF 308 THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT 309 LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR 310 LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE 311 PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH 312 HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 313 SUCH DAMAGES. 314 315 END OF TERMS AND CONDITIONS 316 317 How to Apply These Terms to Your New Programs 318 319 If you develop a new program, and you want it to be of the 320 greatest possible use to the public, the best way to achieve 321 this is to make it free software which everyone can 322 redistribute and change under these terms. 323 324 To do so, attach the following notices to the program. It is 325 safest to attach them to the start of each source file to 326 most effectively convey the exclusion of warranty; and each 327 file should have at least the "copyright" line and a pointer 328 to where the full notice is found. 329 330 One line to give the program's name and a brief idea of what 331 it does. 332 333 Copyright (C) <year> <name of author> 334 This program is free software; you can redistribute it 335 and/or modify it under the terms of the GNU General Public 336 License as published by the Free Software Foundation; either 337 version 2 of the License, or (at your option) any later 338 version. This program is distributed in the hope that it 339 will be useful, but WITHOUT ANY WARRANTY; without even the 340 implied warranty of MERCHANTABILITY or FITNESS FOR A 341 PARTICULAR PURPOSE. See the GNU General Public License for 342 more details. You should have received a copy of the GNU 343 General Public License along with this program; if not, 344 write to the Free Software Foundation, Inc., 59 Temple 345 Place, Suite 330, Boston, MA 02111-1307 USA 346 347 Also add information on how to contact you by electronic and 348 paper mail. If the program is interactive, make it output a 349 short notice like this when it starts in an interactive 350 mode: 351 352 Gnomovision version 69, Copyright (C) year name of author 353 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details 354 type `show w'. This is free software, and you are welcome to 355 redistribute it under certain conditions; type `show c' for 356 details. The hypothetical commands `show w' and `show c' 357 should show the appropriate parts of the General Public 358 License. Of course, the commands you use may be called 359 something other than `show w' and `show c'; they could even 360 be mouse-clicks or menu items--whatever suits your program. 361 362 You should also get your employer (if you work as a 363 programmer) or your school, if any, to sign a "copyright 364 disclaimer" for the program, if necessary. Here is a sample; 365 alter the names: 366 367 Yoyodyne, Inc., hereby disclaims all copyright interest in 368 the program `Gnomovision' (which makes passes at compilers) 369 written by James Hacker. 370 371 signature of Ty Coon, 1 April 1989 372 Ty Coon, President of Vice 373 This General Public License does not permit incorporating 374 your program into proprietary programs. If your program is a 375 subroutine library, you may consider it more useful to 376 permit linking proprietary applications with the library. If 377 this is what you want to do, use the GNU Library General 378 Public License instead of this License. 379 380 "CLASSPATH" EXCEPTION TO THE GPL VERSION 2 381 382 Certain source files distributed by Sun Microsystems, Inc. 383 are subject to the following clarification and special 384 exception to the GPL Version 2, but only where Sun has 385 expressly included in the particular source file's header 386 the words "Sun designates this particular file as subject 387 to the "Classpath" exception as provided by Sun in the 388 License file that accompanied this code." 389 390 Linking this library statically or dynamically with other 391 modules is making a combined work based on this library. 392 Thus, the terms and conditions of the GNU General Public 393 License Version 2 cover the whole combination. 394 395 As a special exception, the copyright holders of this 396 library give you permission to link this library with 397 independent modules to produce an executable, regardless of 398 the license terms of these independent modules, and to copy 399 and distribute the resulting executable under terms of your 400 choice, provided that you also meet, for each linked 401 independent module, the terms and conditions of the license 402 of that module. An independent module is a module which is 403 not derived from or based on this library. If you modify 404 this library, you may extend this exception to your version 405 of the library, but you are not obligated to do so. If you 406 do not wish to do so, delete this exception statement from 407 your version.
