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1License (GPL) 2==================== 3 4:: 5 6 GNU GENERAL PUBLIC LICENSE 7 Version 2, June 1991 8 9 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 10 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 11 Everyone is permitted to copy and distribute verbatim copies 12 of this license document, but changing it is not allowed. 13 14 Preamble 15 16 The licenses for most software are designed to take away your 17 freedom to share and change it. By contrast, the GNU General Public 18 License is intended to guarantee your freedom to share and change free 19 software--to make sure the software is free for all its users. This 20 General Public License applies to most of the Free Software 21 Foundation's software and to any other program whose authors commit to 22 using it. (Some other Free Software Foundation software is covered by 23 the GNU Library General Public License instead.) You can apply it to 24 your programs, too. 25 26 When we speak of free software, we are referring to freedom, not 27 price. Our General Public Licenses are designed to make sure that you 28 have the freedom to distribute copies of free software (and charge for 29 this service if you wish), that you receive source code or can get it 30 if you want it, that you can change the software or use pieces of it 31 in new free programs; and that you know you can do these things. 32 33 To protect your rights, we need to make restrictions that forbid 34 anyone to deny you these rights or to ask you to surrender the rights. 35 These restrictions translate to certain responsibilities for you if you 36 distribute copies of the software, or if you modify it. 37 38 For example, if you distribute copies of such a program, whether 39 gratis or for a fee, you must give the recipients all the rights that 40 you have. You must make sure that they, too, receive or can get the 41 source code. And you must show them these terms so they know their 42 rights. 43 44 We protect your rights with two steps: (1) copyright the software, and 45 (2) offer you this license which gives you legal permission to copy, 46 distribute and/or modify the software. 47 48 Also, for each author's protection and ours, we want to make certain 49 that everyone understands that there is no warranty for this free 50 software. If the software is modified by someone else and passed on, we 51 want its recipients to know that what they have is not the original, so 52 that any problems introduced by others will not reflect on the original 53 authors' reputations. 54 55 Finally, any free program is threatened constantly by software 56 patents. We wish to avoid the danger that redistributors of a free 57 program will individually obtain patent licenses, in effect making the 58 program proprietary. To prevent this, we have made it clear that any 59 patent must be licensed for everyone's free use or not licensed at all. 60 61 The precise terms and conditions for copying, distribution and 62 modification follow. 63 64 GNU GENERAL PUBLIC LICENSE 65 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 66 67 0. This License applies to any program or other work which contains 68 a notice placed by the copyright holder saying it may be distributed 69 under the terms of this General Public License. The "Program", below, 70 refers to any such program or work, and a "work based on the Program" 71 means either the Program or any derivative work under copyright law: 72 that is to say, a work containing the Program or a portion of it, 73 either verbatim or with modifications and/or translated into another 74 language. (Hereinafter, translation is included without limitation in 75 the term "modification".) Each licensee is addressed as "you". 76 77 Activities other than copying, distribution and modification are not 78 covered by this License; they are outside its scope. The act of 79 running the Program is not restricted, and the output from the Program 80 is covered only if its contents constitute a work based on the 81 Program (independent of having been made by running the Program). 82 Whether that is true depends on what the Program does. 83 84 1. You may copy and distribute verbatim copies of the Program's 85 source code as you receive it, in any medium, provided that you 86 conspicuously and appropriately publish on each copy an appropriate 87 copyright notice and disclaimer of warranty; keep intact all the 88 notices that refer to this License and to the absence of any warranty; 89 and give any other recipients of the Program a copy of this License 90 along with the Program. 91 92 You may charge a fee for the physical act of transferring a copy, and 93 you may at your option offer warranty protection in exchange for a fee. 94 95 2. You may modify your copy or copies of the Program or any portion 96 of it, thus forming a work based on the Program, and copy and 97 distribute such modifications or work under the terms of Section 1 98 above, provided that you also meet all of these conditions: 99 100 a) You must cause the modified files to carry prominent notices 101 stating that you changed the files and the date of any change. 102 103 b) You must cause any work that you distribute or publish, that in 104 whole or in part contains or is derived from the Program or any 105 part thereof, to be licensed as a whole at no charge to all third 106 parties under the terms of this License. 107 108 c) If the modified program normally reads commands interactively 109 when run, you must cause it, when started running for such 110 interactive use in the most ordinary way, to print or display an 111 announcement including an appropriate copyright notice and a 112 notice that there is no warranty (or else, saying that you provide 113 a warranty) and that users may redistribute the program under 114 these conditions, and telling the user how to view a copy of this 115 License. (Exception: if the Program itself is interactive but 116 does not normally print such an announcement, your work based on 117 the Program is not required to print an announcement.) 118 119 These requirements apply to the modified work as a whole. If 120 identifiable sections of that work are not derived from the Program, 121 and can be reasonably considered independent and separate works in 122 themselves, then this License, and its terms, do not apply to those 123 sections when you distribute them as separate works. But when you 124 distribute the same sections as part of a whole which is a work based 125 on the Program, the distribution of the whole must be on the terms of 126 this License, whose permissions for other licensees extend to the 127 entire whole, and thus to each and every part regardless of who wrote it. 128 129 Thus, it is not the intent of this section to claim rights or contest 130 your rights to work written entirely by you; rather, the intent is to 131 exercise the right to control the distribution of derivative or 132 collective works based on the Program. 133 134 In addition, mere aggregation of another work not based on the Program 135 with the Program (or with a work based on the Program) on a volume of 136 a storage or distribution medium does not bring the other work under 137 the scope of this License. 138 139 3. You may copy and distribute the Program (or a work based on it, 140 under Section 2) in object code or executable form under the terms of 141 Sections 1 and 2 above provided that you also do one of the following: 142 143 a) Accompany it with the complete corresponding machine-readable 144 source code, which must be distributed under the terms of Sections 145 1 and 2 above on a medium customarily used for software interchange; or, 146 147 b) Accompany it with a written offer, valid for at least three 148 years, to give any third party, for a charge no more than your 149 cost of physically performing source distribution, a complete 150 machine-readable copy of the corresponding source code, to be 151 distributed under the terms of Sections 1 and 2 above on a medium 152 customarily used for software interchange; or, 153 154 c) Accompany it with the information you received as to the offer 155 to distribute corresponding source code. (This alternative is 156 allowed only for noncommercial distribution and only if you 157 received the program in object code or executable form with such 158 an offer, in accord with Subsection b above.) 159 160 The source code for a work means the preferred form of the work for 161 making modifications to it. For an executable work, complete source 162 code means all the source code for all modules it contains, plus any 163 associated interface definition files, plus the scripts used to 164 control compilation and installation of the executable. However, as a 165 special exception, the source code distributed need not include 166 anything that is normally distributed (in either source or binary 167 form) with the major components (compiler, kernel, and so on) of the 168 operating system on which the executable runs, unless that component 169 itself accompanies the executable. 170 171 If distribution of executable or object code is made by offering 172 access to copy from a designated place, then offering equivalent 173 access to copy the source code from the same place counts as 174 distribution of the source code, even though third parties are not 175 compelled to copy the source along with the object code. 176 177 4. You may not copy, modify, sublicense, or distribute the Program 178 except as expressly provided under this License. Any attempt 179 otherwise to copy, modify, sublicense or distribute the Program is 180 void, and will automatically terminate your rights under this License. 181 However, parties who have received copies, or rights, from you under 182 this License will not have their licenses terminated so long as such 183 parties remain in full compliance. 184 185 5. You are not required to accept this License, since you have not 186 signed it. However, nothing else grants you permission to modify or 187 distribute the Program or its derivative works. These actions are 188 prohibited by law if you do not accept this License. Therefore, by 189 modifying or distributing the Program (or any work based on the 190 Program), you indicate your acceptance of this License to do so, and 191 all its terms and conditions for copying, distributing or modifying 192 the Program or works based on it. 193 194 6. Each time you redistribute the Program (or any work based on the 195 Program), the recipient automatically receives a license from the 196 original licensor to copy, distribute or modify the Program subject to 197 these terms and conditions. You may not impose any further 198 restrictions on the recipients' exercise of the rights granted herein. 199 You are not responsible for enforcing compliance by third parties to 200 this License. 201 202 7. If, as a consequence of a court judgment or allegation of patent 203 infringement or for any other reason (not limited to patent issues), 204 conditions are imposed on you (whether by court order, agreement or 205 otherwise) that contradict the conditions of this License, they do not 206 excuse you from the conditions of this License. If you cannot 207 distribute so as to satisfy simultaneously your obligations under this 208 License and any other pertinent obligations, then as a consequence you 209 may not distribute the Program at all. For example, if a patent 210 license would not permit royalty-free redistribution of the Program by 211 all those who receive copies directly or indirectly through you, then 212 the only way you could satisfy both it and this License would be to 213 refrain entirely from distribution of the Program. 214 215 If any portion of this section is held invalid or unenforceable under 216 any particular circumstance, the balance of the section is intended to 217 apply and the section as a whole is intended to apply in other 218 circumstances. 219 220 It is not the purpose of this section to induce you to infringe any 221 patents or other property right claims or to contest validity of any 222 such claims; this section has the sole purpose of protecting the 223 integrity of the free software distribution system, which is 224 implemented by public license practices. Many people have made 225 generous contributions to the wide range of software distributed 226 through that system in reliance on consistent application of that 227 system; it is up to the author/donor to decide if he or she is willing 228 to distribute software through any other system and a licensee cannot 229 impose that choice. 230 231 This section is intended to make thoroughly clear what is believed to 232 be a consequence of the rest of this License. 233 234 8. If the distribution and/or use of the Program is restricted in 235 certain countries either by patents or by copyrighted interfaces, the 236 original copyright holder who places the Program under this License 237 may add an explicit geographical distribution limitation excluding 238 those countries, so that distribution is permitted only in or among 239 countries not thus excluded. In such case, this License incorporates 240 the limitation as if written in the body of this License. 241 242 9. The Free Software Foundation may publish revised and/or new versions 243 of the General Public License from time to time. Such new versions will 244 be similar in spirit to the present version, but may differ in detail to 245 address new problems or concerns. 246 247 Each version is given a distinguishing version number. If the Program 248 specifies a version number of this License which applies to it and "any 249 later version", you have the option of following the terms and conditions 250 either of that version or of any later version published by the Free 251 Software Foundation. If the Program does not specify a version number of 252 this License, you may choose any version ever published by the Free Software 253 Foundation. 254 255 10. If you wish to incorporate parts of the Program into other free 256 programs whose distribution conditions are different, write to the author 257 to ask for permission. For software which is copyrighted by the Free 258 Software Foundation, write to the Free Software Foundation; we sometimes 259 make exceptions for this. Our decision will be guided by the two goals 260 of preserving the free status of all derivatives of our free software and 261 of promoting the sharing and reuse of software generally. 262 263 NO WARRANTY 264 265 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 266 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 267 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 268 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 269 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 270 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 271 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 272 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 273 REPAIR OR CORRECTION. 274 275 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 276 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 277 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 278 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 279 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 280 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 281 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 282 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 283 POSSIBILITY OF SUCH DAMAGES. 284 285 END OF TERMS AND CONDITIONS 286 287 How to Apply These Terms to Your New Programs 288 289 If you develop a new program, and you want it to be of the greatest 290 possible use to the public, the best way to achieve this is to make it 291 free software which everyone can redistribute and change under these terms. 292 293 To do so, attach the following notices to the program. It is safest 294 to attach them to the start of each source file to most effectively 295 convey the exclusion of warranty; and each file should have at least 296 the "copyright" line and a pointer to where the full notice is found. 297 298 <one line to give the program's name and a brief idea of what it does.> 299 Copyright (C) <year> <name of author> 300 301 This program is free software; you can redistribute it and/or modify 302 it under the terms of the GNU General Public License as published by 303 the Free Software Foundation; either version 2 of the License, or 304 (at your option) any later version. 305 306 This program is distributed in the hope that it will be useful, 307 but WITHOUT ANY WARRANTY; without even the implied warranty of 308 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 309 GNU General Public License for more details. 310 311 You should have received a copy of the GNU General Public License 312 along with this program; if not, write to the Free Software 313 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 314 315 316 Also add information on how to contact you by electronic and paper mail. 317 318 If the program is interactive, make it output a short notice like this 319 when it starts in an interactive mode: 320 321 Gnomovision version 69, Copyright (C) year name of author 322 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 323 This is free software, and you are welcome to redistribute it 324 under certain conditions; type `show c' for details. 325 326 The hypothetical commands `show w' and `show c' should show the appropriate 327 parts of the General Public License. Of course, the commands you use may 328 be called something other than `show w' and `show c'; they could even be 329 mouse-clicks or menu items--whatever suits your program. 330 331 You should also get your employer (if you work as a programmer) or your 332 school, if any, to sign a "copyright disclaimer" for the program, if 333 necessary. Here is a sample; alter the names: 334 335 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 336 `Gnomovision' (which makes passes at compilers) written by James Hacker. 337 338 <signature of Ty Coon>, 1 April 1989 339 Ty Coon, President of Vice 340 341 This General Public License does not permit incorporating your program into 342 proprietary programs. If your program is a subroutine library, you may 343 consider it more useful to permit linking proprietary applications with the 344 library. If this is what you want to do, use the GNU Library General 345 Public License instead of this License.