1 2"This software program is licensed subject to the GNU General Public License 3(GPL). Version 2, June 1991, available at 4<http://www.fsf.org/copyleft/gpl.html>" 5 6GNU General Public License 7 8Version 2, June 1991 9 10Copyright (C) 1989, 1991 Free Software Foundation, Inc. 1159 Temple Place - Suite 330, Boston, MA 02111-1307, USA 12 13Everyone is permitted to copy and distribute verbatim copies of this license 14document, but changing it is not allowed. 15 16Preamble 17 18The licenses for most software are designed to take away your freedom to 19share and change it. By contrast, the GNU General Public License is intended 20to guarantee your freedom to share and change free software--to make sure 21the software is free for all its users. This General Public License applies 22to most of the Free Software Foundation's software and to any other program 23whose authors commit to using it. (Some other Free Software Foundation 24software is covered by the GNU Library General Public License instead.) You 25can apply it to your programs, too. 26 27When we speak of free software, we are referring to freedom, not price. Our 28General Public Licenses are designed to make sure that you have the freedom 29to distribute copies of free software (and charge for this service if you 30wish), that you receive source code or can get it if you want it, that you 31can change the software or use pieces of it in new free programs; and that 32you know you can do these things. 33 34To protect your rights, we need to make restrictions that forbid anyone to 35deny you these rights or to ask you to surrender the rights. These 36restrictions translate to certain responsibilities for you if you distribute 37copies of the software, or if you modify it. 38 39For example, if you distribute copies of such a program, whether gratis or 40for a fee, you must give the recipients all the rights that you have. You 41must make sure that they, too, receive or can get the source code. And you 42must show them these terms so they know their rights. 43 44We protect your rights with two steps: (1) copyright the software, and (2) 45offer you this license which gives you legal permission to copy, distribute 46and/or modify the software. 47 48Also, for each author's protection and ours, we want to make certain that 49everyone understands that there is no warranty for this free software. If 50the software is modified by someone else and passed on, we want its 51recipients to know that what they have is not the original, so that any 52problems introduced by others will not reflect on the original authors' 53reputations. 54 55Finally, any free program is threatened constantly by software patents. We 56wish to avoid the danger that redistributors of a free program will 57individually obtain patent licenses, in effect making the program 58proprietary. To prevent this, we have made it clear that any patent must be 59licensed for everyone's free use or not licensed at all. 60 61The precise terms and conditions for copying, distribution and modification 62follow. 63 64TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 65 660. This License applies to any program or other work which contains a notice 67 placed by the copyright holder saying it may be distributed under the 68 terms of this General Public License. The "Program", below, refers to any 69 such program or work, and a "work based on the Program" means either the 70 Program or any derivative work under copyright law: that is to say, a 71 work containing the Program or a portion of it, either verbatim or with 72 modifications and/or translated into another language. (Hereinafter, 73 translation is included without limitation in the term "modification".) 74 Each licensee is addressed as "you". 75 76 Activities other than copying, distribution and modification are not 77 covered by this License; they are outside its scope. The act of running 78 the Program is not restricted, and the output from the Program is covered 79 only if its contents constitute a work based on the Program (independent 80 of having been made by running the Program). Whether that is true depends 81 on what the Program does. 82 831. You may copy and distribute verbatim copies of the Program's source code 84 as you receive it, in any medium, provided that you conspicuously and 85 appropriately publish on each copy an appropriate copyright notice and 86 disclaimer of warranty; keep intact all the notices that refer to this 87 License and to the absence of any warranty; and give any other recipients 88 of the Program a copy of this License along with the Program. 89 90 You may charge a fee for the physical act of transferring a copy, and you 91 may at your option offer warranty protection in exchange for a fee. 92 932. You may modify your copy or copies of the Program or any portion of it, 94 thus forming a work based on the Program, and copy and distribute such 95 modifications or work under the terms of Section 1 above, provided that 96 you also meet all of these conditions: 97 98 * a) You must cause the modified files to carry prominent notices stating 99 that you changed the files and the date of any change. 100 101 * b) You must cause any work that you distribute or publish, that in 102 whole or in part contains or is derived from the Program or any part 103 thereof, to be licensed as a whole at no charge to all third parties 104 under the terms of this License. 105 106 * c) If the modified program normally reads commands interactively when 107 run, you must cause it, when started running for such interactive 108 use in the most ordinary way, to print or display an announcement 109 including an appropriate copyright notice and a notice that there is 110 no warranty (or else, saying that you provide a warranty) and that 111 users may redistribute the program under these conditions, and 112 telling the user how to view a copy of this License. (Exception: if 113 the Program itself is interactive but does not normally print such 114 an announcement, your work based on the Program is not required to 115 print an announcement.) 116 117 These requirements apply to the modified work as a whole. If identifiable 118 sections of that work are not derived from the Program, and can be 119 reasonably considered independent and separate works in themselves, then 120 this License, and its terms, do not apply to those sections when you 121 distribute them as separate works. But when you distribute the same 122 sections as part of a whole which is a work based on the Program, the 123 distribution of the whole must be on the terms of this License, whose 124 permissions for other licensees extend to the entire whole, and thus to 125 each and every part regardless of who wrote it. 126 127 Thus, it is not the intent of this section to claim rights or contest 128 your rights to work written entirely by you; rather, the intent is to 129 exercise the right to control the distribution of derivative or 130 collective works based on the Program. 131 132 In addition, mere aggregation of another work not based on the Program 133 with the Program (or with a work based on the Program) on a volume of a 134 storage or distribution medium does not bring the other work under the 135 scope of this License. 136 1373. You may copy and distribute the Program (or a work based on it, under 138 Section 2) in object code or executable form under the terms of Sections 139 1 and 2 above provided that you also do one of the following: 140 141 * a) Accompany it with the complete corresponding machine-readable source 142 code, which must be distributed under the terms of Sections 1 and 2 143 above on a medium customarily used for software interchange; or, 144 145 * b) Accompany it with a written offer, valid for at least three years, 146 to give any third party, for a charge no more than your cost of 147 physically performing source distribution, a complete machine- 148 readable copy of the corresponding source code, to be distributed 149 under the terms of Sections 1 and 2 above on a medium customarily 150 used for software interchange; or, 151 152 * c) Accompany it with the information you received as to the offer to 153 distribute corresponding source code. (This alternative is allowed 154 only for noncommercial distribution and only if you received the 155 program in object code or executable form with such an offer, in 156 accord with Subsection b above.) 157 158 The source code for a work means the preferred form of the work for 159 making modifications to it. For an executable work, complete source code 160 means all the source code for all modules it contains, plus any 161 associated interface definition files, plus the scripts used to control 162 compilation and installation of the executable. However, as a special 163 exception, the source code distributed need not include anything that is 164 normally distributed (in either source or binary form) with the major 165 components (compiler, kernel, and so on) of the operating system on which 166 the executable runs, unless that component itself accompanies the 167 executable. 168 169 If distribution of executable or object code is made by offering access 170 to copy from a designated place, then offering equivalent access to copy 171 the source code from the same place counts as distribution of the source 172 code, even though third parties are not compelled to copy the source 173 along with the object code. 174 1754. You may not copy, modify, sublicense, or distribute the Program except as 176 expressly provided under this License. Any attempt otherwise to copy, 177 modify, sublicense or distribute the Program is void, and will 178 automatically terminate your rights under this License. However, parties 179 who have received copies, or rights, from you under this License will not 180 have their licenses terminated so long as such parties remain in full 181 compliance. 182 1835. You are not required to accept this License, since you have not signed 184 it. However, nothing else grants you permission to modify or distribute 185 the Program or its derivative works. These actions are prohibited by law 186 if you do not accept this License. Therefore, by modifying or 187 distributing the Program (or any work based on the Program), you 188 indicate your acceptance of this License to do so, and all its terms and 189 conditions for copying, distributing or modifying the Program or works 190 based on it. 191 1926. Each time you redistribute the Program (or any work based on the 193 Program), the recipient automatically receives a license from the 194 original licensor to copy, distribute or modify the Program subject to 195 these terms and conditions. You may not impose any further restrictions 196 on the recipients' exercise of the rights granted herein. You are not 197 responsible for enforcing compliance by third parties to this License. 198 1997. If, as a consequence of a court judgment or allegation of patent 200 infringement or for any other reason (not limited to patent issues), 201 conditions are imposed on you (whether by court order, agreement or 202 otherwise) that contradict the conditions of this License, they do not 203 excuse you from the conditions of this License. If you cannot distribute 204 so as to satisfy simultaneously your obligations under this License and 205 any other pertinent obligations, then as a consequence you may not 206 distribute the Program at all. For example, if a patent license would 207 not permit royalty-free redistribution of the Program by all those who 208 receive copies directly or indirectly through you, then the only way you 209 could satisfy both it and this License would be to refrain entirely from 210 distribution of the Program. 211 212 If any portion of this section is held invalid or unenforceable under any 213 particular circumstance, the balance of the section is intended to apply 214 and the section as a whole is intended to apply in other circumstances. 215 216 It is not the purpose of this section to induce you to infringe any 217 patents or other property right claims or to contest validity of any 218 such claims; this section has the sole purpose of protecting the 219 integrity of the free software distribution system, which is implemented 220 by public license practices. Many people have made generous contributions 221 to the wide range of software distributed through that system in 222 reliance on consistent application of that system; it is up to the 223 author/donor to decide if he or she is willing to distribute software 224 through any other system and a licensee cannot impose that choice. 225 226 This section is intended to make thoroughly clear what is believed to be 227 a consequence of the rest of this License. 228 2298. If the distribution and/or use of the Program is restricted in certain 230 countries either by patents or by copyrighted interfaces, the original 231 copyright holder who places the Program under this License may add an 232 explicit geographical distribution limitation excluding those countries, 233 so that distribution is permitted only in or among countries not thus 234 excluded. In such case, this License incorporates the limitation as if 235 written in the body of this License. 236 2379. The Free Software Foundation may publish revised and/or new versions of 238 the General Public License from time to time. Such new versions will be 239 similar in spirit to the present version, but may differ in detail to 240 address new problems or concerns. 241 242 Each version is given a distinguishing version number. If the Program 243 specifies a version number of this License which applies to it and "any 244 later version", you have the option of following the terms and 245 conditions either of that version or of any later version published by 246 the Free Software Foundation. If the Program does not specify a version 247 number of this License, you may choose any version ever published by the 248 Free Software Foundation. 249 25010. If you wish to incorporate parts of the Program into other free programs 251 whose distribution conditions are different, write to the author to ask 252 for permission. For software which is copyrighted by the Free Software 253 Foundation, write to the Free Software Foundation; we sometimes make 254 exceptions for this. Our decision will be guided by the two goals of 255 preserving the free status of all derivatives of our free software and 256 of promoting the sharing and reuse of software generally. 257 258 NO WARRANTY 259 26011. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 261 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 262 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 263 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER 264 EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 265 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE 266 ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH 267 YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL 268 NECESSARY SERVICING, REPAIR OR CORRECTION. 269 27012. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR 273 DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL 274 DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM 275 (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED 276 INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF 277 THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR 278 OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 279 280END OF TERMS AND CONDITIONS 281 282How to Apply These Terms to Your New Programs 283 284If you develop a new program, and you want it to be of the greatest 285possible use to the public, the best way to achieve this is to make it free 286software which everyone can redistribute and change under these terms. 287 288To do so, attach the following notices to the program. It is safest to 289attach them to the start of each source file to most effectively convey the 290exclusion of warranty; and each file should have at least the "copyright" 291line and a pointer to where the full notice is found. 292 293one line to give the program's name and an idea of what it does. 294Copyright (C) yyyy name of author 295 296This program is free software; you can redistribute it and/or modify it 297under the terms of the GNU General Public License as published by the Free 298Software Foundation; either version 2 of the License, or (at your option) 299any later version. 300 301This program is distributed in the hope that it will be useful, but WITHOUT 302ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 303FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 304more details. 305 306You should have received a copy of the GNU General Public License along with 307this program; if not, write to the Free Software Foundation, Inc., 59 308Temple Place - Suite 330, Boston, MA 02111-1307, USA. 309 310Also add information on how to contact you by electronic and paper mail. 311 312If the program is interactive, make it output a short notice like this when 313it starts in an interactive mode: 314 315Gnomovision version 69, Copyright (C) year name of author Gnomovision comes 316with ABSOLUTELY NO WARRANTY; for details type 'show w'. This is free 317software, and you are welcome to redistribute it under certain conditions; 318type 'show c' for details. 319 320The hypothetical commands 'show w' and 'show c' should show the appropriate 321parts of the General Public License. Of course, the commands you use may be 322called something other than 'show w' and 'show c'; they could even be 323mouse-clicks or menu items--whatever suits your program. 324 325You should also get your employer (if you work as a programmer) or your 326school, if any, to sign a "copyright disclaimer" for the program, if 327necessary. Here is a sample; alter the names: 328 329Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330'Gnomovision' (which makes passes at compilers) written by James Hacker. 331 332signature of Ty Coon, 1 April 1989 333Ty Coon, President of Vice 334 335This General Public License does not permit incorporating your program into 336proprietary programs. If your program is a subroutine library, you may 337consider it more useful to permit linking proprietary applications with the 338library. If this is what you want to do, use the GNU Library General Public 339License instead of this License. 340