1 The GNU General Public License (GPL) 2 3 Version 2, June 1991 4 5 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 6 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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., 291 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Oracle America and/or its affiliates are 329 subject to the following clarification and special exception to the GPL, but 330 only where Oracle has expressly included in the particular source file's header 331 the words "Oracle designates this particular file as subject to the "Classpath" 332 exception as provided by Oracle 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. 348
