1 1.1 skrll GNU GENERAL PUBLIC LICENSE 2 1.1 skrll Version 2, June 1991 3 1.1 skrll 4 1.1 skrll Copyright (C) 1989, 1991 Free Software Foundation, Inc. 5 1.1 skrll 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 1.1 skrll Everyone is permitted to copy and distribute verbatim copies 7 1.1 skrll of this license document, but changing it is not allowed. 8 1.1 skrll 9 1.1 skrll Preamble 10 1.1 skrll 11 1.1 skrll The licenses for most software are designed to take away your 12 1.1 skrll freedom to share and change it. By contrast, the GNU General Public 13 1.1 skrll License is intended to guarantee your freedom to share and change free 14 1.1 skrll software--to make sure the software is free for all its users. This 15 1.1 skrll General Public License applies to most of the Free Software 16 1.1 skrll Foundation's software and to any other program whose authors commit to 17 1.1 skrll using it. (Some other Free Software Foundation software is covered by 18 1.1 skrll the GNU Library General Public License instead.) You can apply it to 19 1.1 skrll your programs, too. 20 1.1 skrll 21 1.1 skrll When we speak of free software, we are referring to freedom, not 22 1.1 skrll price. Our General Public Licenses are designed to make sure that you 23 1.1 skrll have the freedom to distribute copies of free software (and charge for 24 1.1 skrll this service if you wish), that you receive source code or can get it 25 1.1 skrll if you want it, that you can change the software or use pieces of it 26 1.1 skrll in new free programs; and that you know you can do these things. 27 1.1 skrll 28 1.1 skrll To protect your rights, we need to make restrictions that forbid 29 1.1 skrll anyone to deny you these rights or to ask you to surrender the rights. 30 1.1 skrll These restrictions translate to certain responsibilities for you if you 31 1.1 skrll distribute copies of the software, or if you modify it. 32 1.1 skrll 33 1.1 skrll For example, if you distribute copies of such a program, whether 34 1.1 skrll gratis or for a fee, you must give the recipients all the rights that 35 1.1 skrll you have. You must make sure that they, too, receive or can get the 36 1.1 skrll source code. And you must show them these terms so they know their 37 1.1 skrll rights. 38 1.1 skrll 39 1.1 skrll We protect your rights with two steps: (1) copyright the software, and 40 1.1 skrll (2) offer you this license which gives you legal permission to copy, 41 1.1 skrll distribute and/or modify the software. 42 1.1 skrll 43 1.1 skrll Also, for each author's protection and ours, we want to make certain 44 1.1 skrll that everyone understands that there is no warranty for this free 45 1.1 skrll software. If the software is modified by someone else and passed on, we 46 1.1 skrll want its recipients to know that what they have is not the original, so 47 1.1 skrll that any problems introduced by others will not reflect on the original 48 1.1 skrll authors' reputations. 49 1.1 skrll 50 1.1 skrll Finally, any free program is threatened constantly by software 51 1.1 skrll patents. We wish to avoid the danger that redistributors of a free 52 1.1 skrll program will individually obtain patent licenses, in effect making the 53 1.1 skrll program proprietary. To prevent this, we have made it clear that any 54 1.1 skrll patent must be licensed for everyone's free use or not licensed at all. 55 1.1 skrll 56 1.1 skrll The precise terms and conditions for copying, distribution and 57 1.1 skrll modification follow. 58 1.1 skrll 60 1.1 skrll GNU GENERAL PUBLIC LICENSE 61 1.1 skrll TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 62 1.1 skrll 63 1.1 skrll 0. This License applies to any program or other work which contains 64 1.1 skrll a notice placed by the copyright holder saying it may be distributed 65 1.1 skrll under the terms of this General Public License. The "Program", below, 66 1.1 skrll refers to any such program or work, and a "work based on the Program" 67 1.1 skrll means either the Program or any derivative work under copyright law: 68 1.1 skrll that is to say, a work containing the Program or a portion of it, 69 1.1 skrll either verbatim or with modifications and/or translated into another 70 1.1 skrll language. (Hereinafter, translation is included without limitation in 71 1.1 skrll the term "modification".) Each licensee is addressed as "you". 72 1.1 skrll 73 1.1 skrll Activities other than copying, distribution and modification are not 74 1.1 skrll covered by this License; they are outside its scope. 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You may copy and distribute verbatim copies of the Program's 81 1.1 skrll source code as you receive it, in any medium, provided that you 82 1.1 skrll conspicuously and appropriately publish on each copy an appropriate 83 1.1 skrll copyright notice and disclaimer of warranty; keep intact all the 84 1.1 skrll notices that refer to this License and to the absence of any warranty; 85 1.1 skrll and give any other recipients of the Program a copy of this License 86 1.1 skrll along with the Program. 87 1.1 skrll 88 1.1 skrll You may charge a fee for the physical act of transferring a copy, and 89 1.1 skrll you may at your option offer warranty protection in exchange for a fee. 90 1.1 skrll 91 1.1 skrll 2. 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(Exception: if the Program itself is interactive but 112 1.1 skrll does not normally print such an announcement, your work based on 113 1.1 skrll the Program is not required to print an announcement.) 114 1.1 skrll 116 1.1 skrll These requirements apply to the modified work as a whole. If 117 1.1 skrll identifiable sections of that work are not derived from the Program, 118 1.1 skrll and can be reasonably considered independent and separate works in 119 1.1 skrll themselves, then this License, and its terms, do not apply to those 120 1.1 skrll sections when you distribute them as separate works. But when you 121 1.1 skrll distribute the same sections as part of a whole which is a work based 122 1.1 skrll on the Program, the distribution of the whole must be on the terms of 123 1.1 skrll this License, whose permissions for other licensees extend to the 124 1.1 skrll entire whole, and thus to each and every part regardless of who wrote it. 125 1.1 skrll 126 1.1 skrll Thus, it is not the intent of this section to claim rights or contest 127 1.1 skrll your rights to work written entirely by you; rather, the intent is to 128 1.1 skrll exercise the right to control the distribution of derivative or 129 1.1 skrll collective works based on the Program. 130 1.1 skrll 131 1.1 skrll In addition, mere aggregation of another work not based on the Program 132 1.1 skrll with the Program (or with a work based on the Program) on a volume of 133 1.1 skrll a storage or distribution medium does not bring the other work under 134 1.1 skrll the scope of this License. 135 1.1 skrll 136 1.1 skrll 3. You may copy and distribute the Program (or a work based on it, 137 1.1 skrll under Section 2) in object code or executable form under the terms of 138 1.1 skrll Sections 1 and 2 above provided that you also do one of the following: 139 1.1 skrll 140 1.1 skrll a) Accompany it with the complete corresponding machine-readable 141 1.1 skrll source code, which must be distributed under the terms of Sections 142 1.1 skrll 1 and 2 above on a medium customarily used for software interchange; or, 143 1.1 skrll 144 1.1 skrll b) Accompany it with a written offer, valid for at least three 145 1.1 skrll years, to give any third party, for a charge no more than your 146 1.1 skrll cost of physically performing source distribution, a complete 147 1.1 skrll machine-readable copy of the corresponding source code, to be 148 1.1 skrll distributed under the terms of Sections 1 and 2 above on a medium 149 1.1 skrll customarily used for software interchange; or, 150 1.1 skrll 151 1.1 skrll c) Accompany it with the information you received as to the offer 152 1.1 skrll to distribute corresponding source code. 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If the distribution and/or use of the Program is restricted in 234 1.1 skrll certain countries either by patents or by copyrighted interfaces, the 235 1.1 skrll original copyright holder who places the Program under this License 236 1.1 skrll may add an explicit geographical distribution limitation excluding 237 1.1 skrll those countries, so that distribution is permitted only in or among 238 1.1 skrll countries not thus excluded. In such case, this License incorporates 239 1.1 skrll the limitation as if written in the body of this License. 240 1.1 skrll 241 1.1 skrll 9. The Free Software Foundation may publish revised and/or new versions 242 1.1 skrll of the General Public License from time to time. Such new versions will 243 1.1 skrll be similar in spirit to the present version, but may differ in detail to 244 1.1 skrll address new problems or concerns. 245 1.1 skrll 246 1.1 skrll Each version is given a distinguishing version number. If the Program 247 1.1 skrll specifies a version number of this License which applies to it and "any 248 1.1 skrll later version", you have the option of following the terms and conditions 249 1.1 skrll either of that version or of any later version published by the Free 250 1.1 skrll Software Foundation. If the Program does not specify a version number of 251 1.1 skrll this License, you may choose any version ever published by the Free Software 252 1.1 skrll Foundation. 253 1.1 skrll 254 1.1 skrll 10. If you wish to incorporate parts of the Program into other free 255 1.1 skrll programs whose distribution conditions are different, write to the author 256 1.1 skrll to ask for permission. For software which is copyrighted by the Free 257 1.1 skrll Software Foundation, write to the Free Software Foundation; we sometimes 258 1.1 skrll make exceptions for this. Our decision will be guided by the two goals 259 1.1 skrll of preserving the free status of all derivatives of our free software and 260 1.1 skrll of promoting the sharing and reuse of software generally. 261 1.1 skrll 262 1.1 skrll NO WARRANTY 263 1.1 skrll 264 1.1 skrll 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 265 1.1 skrll FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 266 1.1 skrll OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 267 1.1 skrll PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 268 1.1 skrll OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 269 1.1 skrll MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 270 1.1 skrll TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 271 1.1 skrll PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 272 1.1 skrll REPAIR OR CORRECTION. 273 1.1 skrll 274 1.1 skrll 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 275 1.1 skrll WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 276 1.1 skrll REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 277 1.1 skrll INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 278 1.1 skrll OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 279 1.1 skrll TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 280 1.1 skrll YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 281 1.1 skrll PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 282 1.1 skrll POSSIBILITY OF SUCH DAMAGES. 283 1.1 skrll 284 1.1 skrll END OF TERMS AND CONDITIONS 285 1.1 skrll 287 1.1 skrll How to Apply These Terms to Your New Programs 288 1.1 skrll 289 1.1 skrll If you develop a new program, and you want it to be of the greatest 290 1.1 skrll possible use to the public, the best way to achieve this is to make it 291 1.1 skrll free software which everyone can redistribute and change under these terms. 292 1.1 skrll 293 1.1 skrll To do so, attach the following notices to the program. It is safest 294 1.1 skrll to attach them to the start of each source file to most effectively 295 1.1 skrll convey the exclusion of warranty; and each file should have at least 296 1.1 skrll the "copyright" line and a pointer to where the full notice is found. 297 1.1 skrll 298 1.1 skrll <one line to give the program's name and a brief idea of what it does.> 299 1.1 skrll Copyright (C) <year> <name of author> 300 1.1 skrll 301 1.1 skrll This program is free software; you can redistribute it and/or modify 302 1.1 skrll it under the terms of the GNU General Public License as published by 303 1.1 skrll the Free Software Foundation; either version 2 of the License, or 304 1.1 skrll (at your option) any later version. 305 1.1 skrll 306 1.1 skrll This program is distributed in the hope that it will be useful, 307 1.1 skrll but WITHOUT ANY WARRANTY; without even the implied warranty of 308 1.1 skrll MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 309 1.1 skrll GNU General Public License for more details. 310 1.1 skrll 311 1.1 skrll You should have received a copy of the GNU General Public License 312 1.1 skrll along with this program; if not, write to the Free Software 313 1.1 skrll Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 314 1.1 skrll 315 1.1 skrll 316 1.1 skrll Also add information on how to contact you by electronic and paper mail. 317 1.1 skrll 318 1.1 skrll If the program is interactive, make it output a short notice like this 319 1.1 skrll when it starts in an interactive mode: 320 1.1 skrll 321 1.1 skrll Gnomovision version 69, Copyright (C) year name of author 322 1.1 skrll Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 323 1.1 skrll This is free software, and you are welcome to redistribute it 324 1.1 skrll under certain conditions; type `show c' for details. 325 1.1 skrll 326 1.1 skrll The hypothetical commands `show w' and `show c' should show the appropriate 327 1.1 skrll parts of the General Public License. Of course, the commands you use may 328 1.1 skrll be called something other than `show w' and `show c'; they could even be 329 1.1 skrll mouse-clicks or menu items--whatever suits your program. 330 1.1 skrll 331 1.1 skrll You should also get your employer (if you work as a programmer) or your 332 1.1 skrll school, if any, to sign a "copyright disclaimer" for the program, if 333 1.1 skrll necessary. Here is a sample; alter the names: 334 1.1 skrll 335 1.1 skrll Yoyodyne, Inc., hereby disclaims all copyright interest in the program 336 1.1 skrll `Gnomovision' (which makes passes at compilers) written by James Hacker. 337 1.1 skrll 338 1.1 skrll <signature of Ty Coon>, 1 April 1989 339 1.1 skrll Ty Coon, President of Vice 340 1.1 skrll 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. 346