1*61ef61f6Sdavidjimenez75 GNU GENERAL PUBLIC LICENSE 2*61ef61f6Sdavidjimenez75 Version 2, June 1991 30e943c71Sdavidjimenez75 4*61ef61f6Sdavidjimenez75 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5*61ef61f6Sdavidjimenez75 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6*61ef61f6Sdavidjimenez75 Everyone is permitted to copy and distribute verbatim copies 7*61ef61f6Sdavidjimenez75 of this license document, but changing it is not allowed. 80e943c71Sdavidjimenez75 9*61ef61f6Sdavidjimenez75 Preamble 100e943c71Sdavidjimenez75 11*61ef61f6Sdavidjimenez75 The licenses for most software are designed to take away your 12*61ef61f6Sdavidjimenez75freedom to share and change it. By contrast, the GNU General Public 13*61ef61f6Sdavidjimenez75License is intended to guarantee your freedom to share and change free 14*61ef61f6Sdavidjimenez75software--to make sure the software is free for all its users. This 15*61ef61f6Sdavidjimenez75General Public License applies to most of the Free Software 16*61ef61f6Sdavidjimenez75Foundation's software and to any other program whose authors commit to 17*61ef61f6Sdavidjimenez75using it. (Some other Free Software Foundation software is covered by 18*61ef61f6Sdavidjimenez75the GNU Lesser General Public License instead.) You can apply it to 19*61ef61f6Sdavidjimenez75your programs, too. 200e943c71Sdavidjimenez75 21*61ef61f6Sdavidjimenez75 When we speak of free software, we are referring to freedom, not 22*61ef61f6Sdavidjimenez75price. Our General Public Licenses are designed to make sure that you 23*61ef61f6Sdavidjimenez75have the freedom to distribute copies of free software (and charge for 24*61ef61f6Sdavidjimenez75this service if you wish), that you receive source code or can get it 25*61ef61f6Sdavidjimenez75if you want it, that you can change the software or use pieces of it 26*61ef61f6Sdavidjimenez75in new free programs; and that you know you can do these things. 270e943c71Sdavidjimenez75 28*61ef61f6Sdavidjimenez75 To protect your rights, we need to make restrictions that forbid 29*61ef61f6Sdavidjimenez75anyone to deny you these rights or to ask you to surrender the rights. 30*61ef61f6Sdavidjimenez75These restrictions translate to certain responsibilities for you if you 31*61ef61f6Sdavidjimenez75distribute copies of the software, or if you modify it. 320e943c71Sdavidjimenez75 33*61ef61f6Sdavidjimenez75 For example, if you distribute copies of such a program, whether 34*61ef61f6Sdavidjimenez75gratis or for a fee, you must give the recipients all the rights that 35*61ef61f6Sdavidjimenez75you have. 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To prevent this, we have made it clear that any 54*61ef61f6Sdavidjimenez75patent must be licensed for everyone's free use or not licensed at all. 550e943c71Sdavidjimenez75 56*61ef61f6Sdavidjimenez75 The precise terms and conditions for copying, distribution and 57*61ef61f6Sdavidjimenez75modification follow. 580e943c71Sdavidjimenez75 59*61ef61f6Sdavidjimenez75 GNU GENERAL PUBLIC LICENSE 60*61ef61f6Sdavidjimenez75 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 610e943c71Sdavidjimenez75 62*61ef61f6Sdavidjimenez75 0. This License applies to any program or other work which contains 63*61ef61f6Sdavidjimenez75a notice placed by the copyright holder saying it may be distributed 64*61ef61f6Sdavidjimenez75under the terms of this General Public License. The "Program", below, 65*61ef61f6Sdavidjimenez75refers to any such program or work, and a "work based on the Program" 66*61ef61f6Sdavidjimenez75means either the Program or any derivative work under copyright law: 67*61ef61f6Sdavidjimenez75that is to say, a work containing the Program or a portion of it, 68*61ef61f6Sdavidjimenez75either verbatim or with modifications and/or translated into another 69*61ef61f6Sdavidjimenez75language. (Hereinafter, translation is included without limitation in 70*61ef61f6Sdavidjimenez75the term "modification".) Each licensee is addressed as "you". 710e943c71Sdavidjimenez75 72*61ef61f6Sdavidjimenez75Activities other than copying, distribution and modification are not 73*61ef61f6Sdavidjimenez75covered by this License; they are outside its scope. The act of 74*61ef61f6Sdavidjimenez75running the Program is not restricted, and the output from the Program 75*61ef61f6Sdavidjimenez75is covered only if its contents constitute a work based on the 76*61ef61f6Sdavidjimenez75Program (independent of having been made by running the Program). 77*61ef61f6Sdavidjimenez75Whether that is true depends on what the Program does. 780e943c71Sdavidjimenez75 79*61ef61f6Sdavidjimenez75 1. You may copy and distribute verbatim copies of the Program's 80*61ef61f6Sdavidjimenez75source code as you receive it, in any medium, provided that you 81*61ef61f6Sdavidjimenez75conspicuously and appropriately publish on each copy an appropriate 82*61ef61f6Sdavidjimenez75copyright notice and disclaimer of warranty; keep intact all the 83*61ef61f6Sdavidjimenez75notices that refer to this License and to the absence of any warranty; 84*61ef61f6Sdavidjimenez75and give any other recipients of the Program a copy of this License 85*61ef61f6Sdavidjimenez75along with the Program. 860e943c71Sdavidjimenez75 87*61ef61f6Sdavidjimenez75You may charge a fee for the physical act of transferring a copy, and 88*61ef61f6Sdavidjimenez75you may at your option offer warranty protection in exchange for a fee. 890e943c71Sdavidjimenez75 90*61ef61f6Sdavidjimenez75 2. You may modify your copy or copies of the Program or any portion 91*61ef61f6Sdavidjimenez75of it, thus forming a work based on the Program, and copy and 92*61ef61f6Sdavidjimenez75distribute such modifications or work under the terms of Section 1 93*61ef61f6Sdavidjimenez75above, provided that you also meet all of these conditions: 940e943c71Sdavidjimenez75 95*61ef61f6Sdavidjimenez75 a) You must cause the modified files to carry prominent notices 96*61ef61f6Sdavidjimenez75 stating that you changed the files and the date of any change. 970e943c71Sdavidjimenez75 98*61ef61f6Sdavidjimenez75 b) You must cause any work that you distribute or publish, that in 99*61ef61f6Sdavidjimenez75 whole or in part contains or is derived from the Program or any 100*61ef61f6Sdavidjimenez75 part thereof, to be licensed as a whole at no charge to all third 101*61ef61f6Sdavidjimenez75 parties under the terms of this License. 1020e943c71Sdavidjimenez75 103*61ef61f6Sdavidjimenez75 c) If the modified program normally reads commands interactively 104*61ef61f6Sdavidjimenez75 when run, you must cause it, when started running for such 105*61ef61f6Sdavidjimenez75 interactive use in the most ordinary way, to print or display an 106*61ef61f6Sdavidjimenez75 announcement including an appropriate copyright notice and a 107*61ef61f6Sdavidjimenez75 notice that there is no warranty (or else, saying that you provide 108*61ef61f6Sdavidjimenez75 a warranty) and that users may redistribute the program under 109*61ef61f6Sdavidjimenez75 these conditions, and telling the user how to view a copy of this 110*61ef61f6Sdavidjimenez75 License. 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But when you 119*61ef61f6Sdavidjimenez75distribute the same sections as part of a whole which is a work based 120*61ef61f6Sdavidjimenez75on the Program, the distribution of the whole must be on the terms of 121*61ef61f6Sdavidjimenez75this License, whose permissions for other licensees extend to the 122*61ef61f6Sdavidjimenez75entire whole, and thus to each and every part regardless of who wrote it. 1230e943c71Sdavidjimenez75 124*61ef61f6Sdavidjimenez75Thus, it is not the intent of this section to claim rights or contest 125*61ef61f6Sdavidjimenez75your rights to work written entirely by you; rather, the intent is to 126*61ef61f6Sdavidjimenez75exercise the right to control the distribution of derivative or 127*61ef61f6Sdavidjimenez75collective works based on the Program. 1280e943c71Sdavidjimenez75 129*61ef61f6Sdavidjimenez75In addition, mere aggregation of another work not based on the Program 130*61ef61f6Sdavidjimenez75with the Program (or with a work based on the Program) on a volume of 131*61ef61f6Sdavidjimenez75a storage or distribution medium does not bring the other work under 132*61ef61f6Sdavidjimenez75the scope of this License. 1330e943c71Sdavidjimenez75 134*61ef61f6Sdavidjimenez75 3. You may copy and distribute the Program (or a work based on it, 135*61ef61f6Sdavidjimenez75under Section 2) in object code or executable form under the terms of 136*61ef61f6Sdavidjimenez75Sections 1 and 2 above provided that you also do one of the following: 1370e943c71Sdavidjimenez75 138*61ef61f6Sdavidjimenez75 a) Accompany it with the complete corresponding machine-readable 139*61ef61f6Sdavidjimenez75 source code, which must be distributed under the terms of Sections 140*61ef61f6Sdavidjimenez75 1 and 2 above on a medium customarily used for software interchange; or, 1410e943c71Sdavidjimenez75 142*61ef61f6Sdavidjimenez75 b) Accompany it with a written offer, valid for at least three 143*61ef61f6Sdavidjimenez75 years, to give any third party, for a charge no more than your 144*61ef61f6Sdavidjimenez75 cost of physically performing source distribution, a complete 145*61ef61f6Sdavidjimenez75 machine-readable copy of the corresponding source code, to be 146*61ef61f6Sdavidjimenez75 distributed under the terms of Sections 1 and 2 above on a medium 147*61ef61f6Sdavidjimenez75 customarily used for software interchange; or, 148*61ef61f6Sdavidjimenez75 149*61ef61f6Sdavidjimenez75 c) Accompany it with the information you received as to the offer 150*61ef61f6Sdavidjimenez75 to distribute corresponding source code. (This alternative is 151*61ef61f6Sdavidjimenez75 allowed only for noncommercial distribution and only if you 152*61ef61f6Sdavidjimenez75 received the program in object code or executable form with such 153*61ef61f6Sdavidjimenez75 an offer, in accord with Subsection b above.) 154*61ef61f6Sdavidjimenez75 155*61ef61f6Sdavidjimenez75The source code for a work means the preferred form of the work for 156*61ef61f6Sdavidjimenez75making modifications to it. For an executable work, complete source 157*61ef61f6Sdavidjimenez75code means all the source code for all modules it contains, plus any 158*61ef61f6Sdavidjimenez75associated interface definition files, plus the scripts used to 159*61ef61f6Sdavidjimenez75control compilation and installation of the executable. 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Therefore, by 184*61ef61f6Sdavidjimenez75modifying or distributing the Program (or any work based on the 185*61ef61f6Sdavidjimenez75Program), you indicate your acceptance of this License to do so, and 186*61ef61f6Sdavidjimenez75all its terms and conditions for copying, distributing or modifying 187*61ef61f6Sdavidjimenez75the Program or works based on it. 188*61ef61f6Sdavidjimenez75 189*61ef61f6Sdavidjimenez75 6. Each time you redistribute the Program (or any work based on the 190*61ef61f6Sdavidjimenez75Program), the recipient automatically receives a license from the 191*61ef61f6Sdavidjimenez75original licensor to copy, distribute or modify the Program subject to 192*61ef61f6Sdavidjimenez75these terms and conditions. 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If you cannot 202*61ef61f6Sdavidjimenez75distribute so as to satisfy simultaneously your obligations under this 203*61ef61f6Sdavidjimenez75License and any other pertinent obligations, then as a consequence you 204*61ef61f6Sdavidjimenez75may not distribute the Program at all. For example, if a patent 205*61ef61f6Sdavidjimenez75license would not permit royalty-free redistribution of the Program by 206*61ef61f6Sdavidjimenez75all those who receive copies directly or indirectly through you, then 207*61ef61f6Sdavidjimenez75the only way you could satisfy both it and this License would be to 208*61ef61f6Sdavidjimenez75refrain entirely from distribution of the Program. 209*61ef61f6Sdavidjimenez75 210*61ef61f6Sdavidjimenez75If any portion of this section is held invalid or unenforceable under 211*61ef61f6Sdavidjimenez75any particular circumstance, the balance of the section is intended to 212*61ef61f6Sdavidjimenez75apply and the section as a whole is intended to apply in other 213*61ef61f6Sdavidjimenez75circumstances. 214*61ef61f6Sdavidjimenez75 215*61ef61f6Sdavidjimenez75It is not the purpose of this section to induce you to infringe any 216*61ef61f6Sdavidjimenez75patents or other property right claims or to contest validity of any 217*61ef61f6Sdavidjimenez75such claims; this section has the sole purpose of protecting the 218*61ef61f6Sdavidjimenez75integrity of the free software distribution system, which is 219*61ef61f6Sdavidjimenez75implemented by public license practices. Many people have made 220*61ef61f6Sdavidjimenez75generous contributions to the wide range of software distributed 221*61ef61f6Sdavidjimenez75through that system in reliance on consistent application of that 222*61ef61f6Sdavidjimenez75system; it is up to the author/donor to decide if he or she is willing 223*61ef61f6Sdavidjimenez75to distribute software through any other system and a licensee cannot 224*61ef61f6Sdavidjimenez75impose that choice. 225*61ef61f6Sdavidjimenez75 226*61ef61f6Sdavidjimenez75This section is intended to make thoroughly clear what is believed to 227*61ef61f6Sdavidjimenez75be a consequence of the rest of this License. 228*61ef61f6Sdavidjimenez75 229*61ef61f6Sdavidjimenez75 8. If the distribution and/or use of the Program is restricted in 230*61ef61f6Sdavidjimenez75certain countries either by patents or by copyrighted interfaces, the 231*61ef61f6Sdavidjimenez75original copyright holder who places the Program under this License 232*61ef61f6Sdavidjimenez75may add an explicit geographical distribution limitation excluding 233*61ef61f6Sdavidjimenez75those countries, so that distribution is permitted only in or among 234*61ef61f6Sdavidjimenez75countries not thus excluded. In such case, this License incorporates 235*61ef61f6Sdavidjimenez75the limitation as if written in the body of this License. 236*61ef61f6Sdavidjimenez75 237*61ef61f6Sdavidjimenez75 9. The Free Software Foundation may publish revised and/or new versions 238*61ef61f6Sdavidjimenez75of the General Public License from time to time. Such new versions will 239*61ef61f6Sdavidjimenez75be similar in spirit to the present version, but may differ in detail to 240*61ef61f6Sdavidjimenez75address new problems or concerns. 241*61ef61f6Sdavidjimenez75 242*61ef61f6Sdavidjimenez75Each version is given a distinguishing version number. If the Program 243*61ef61f6Sdavidjimenez75specifies a version number of this License which applies to it and "any 244*61ef61f6Sdavidjimenez75later version", you have the option of following the terms and conditions 245*61ef61f6Sdavidjimenez75either of that version or of any later version published by the Free 246*61ef61f6Sdavidjimenez75Software Foundation. If the Program does not specify a version number of 247*61ef61f6Sdavidjimenez75this License, you may choose any version ever published by the Free Software 248*61ef61f6Sdavidjimenez75Foundation. 249*61ef61f6Sdavidjimenez75 250*61ef61f6Sdavidjimenez75 10. If you wish to incorporate parts of the Program into other free 251*61ef61f6Sdavidjimenez75programs whose distribution conditions are different, write to the author 252*61ef61f6Sdavidjimenez75to ask for permission. For software which is copyrighted by the Free 253*61ef61f6Sdavidjimenez75Software Foundation, write to the Free Software Foundation; we sometimes 254*61ef61f6Sdavidjimenez75make exceptions for this. Our decision will be guided by the two goals 255*61ef61f6Sdavidjimenez75of preserving the free status of all derivatives of our free software and 256*61ef61f6Sdavidjimenez75of promoting the sharing and reuse of software generally. 257*61ef61f6Sdavidjimenez75 258*61ef61f6Sdavidjimenez75 NO WARRANTY 259*61ef61f6Sdavidjimenez75 260*61ef61f6Sdavidjimenez75 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 261*61ef61f6Sdavidjimenez75FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 262*61ef61f6Sdavidjimenez75OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 263*61ef61f6Sdavidjimenez75PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 264*61ef61f6Sdavidjimenez75OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 265*61ef61f6Sdavidjimenez75MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 266*61ef61f6Sdavidjimenez75TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 267*61ef61f6Sdavidjimenez75PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 268*61ef61f6Sdavidjimenez75REPAIR OR CORRECTION. 269*61ef61f6Sdavidjimenez75 270*61ef61f6Sdavidjimenez75 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271*61ef61f6Sdavidjimenez75WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272*61ef61f6Sdavidjimenez75REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273*61ef61f6Sdavidjimenez75INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274*61ef61f6Sdavidjimenez75OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275*61ef61f6Sdavidjimenez75TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276*61ef61f6Sdavidjimenez75YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277*61ef61f6Sdavidjimenez75PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278*61ef61f6Sdavidjimenez75POSSIBILITY OF SUCH DAMAGES. 2790e943c71Sdavidjimenez75 2800e943c71Sdavidjimenez75 END OF TERMS AND CONDITIONS 2810e943c71Sdavidjimenez75 282*61ef61f6Sdavidjimenez75 How to Apply These Terms to Your New Programs 2830e943c71Sdavidjimenez75 284*61ef61f6Sdavidjimenez75 If you develop a new program, and you want it to be of the greatest 285*61ef61f6Sdavidjimenez75possible use to the public, the best way to achieve this is to make it 286*61ef61f6Sdavidjimenez75free software which everyone can redistribute and change under these terms. 2870e943c71Sdavidjimenez75 288*61ef61f6Sdavidjimenez75 To do so, attach the following notices to the program. It is safest 289*61ef61f6Sdavidjimenez75to attach them to the start of each source file to most effectively 290*61ef61f6Sdavidjimenez75convey the exclusion of warranty; and each file should have at least 291*61ef61f6Sdavidjimenez75the "copyright" line and a pointer to where the full notice is found. 2920e943c71Sdavidjimenez75 293*61ef61f6Sdavidjimenez75 <one line to give the program's name and a brief idea of what it does.> 294*61ef61f6Sdavidjimenez75 Copyright (C) <year> <name of author> 2950e943c71Sdavidjimenez75 296*61ef61f6Sdavidjimenez75 This program is free software; you can redistribute it and/or modify 297*61ef61f6Sdavidjimenez75 it under the terms of the GNU General Public License as published by 298*61ef61f6Sdavidjimenez75 the Free Software Foundation; either version 2 of the License, or 299*61ef61f6Sdavidjimenez75 (at your option) any later version. 3000e943c71Sdavidjimenez75 301*61ef61f6Sdavidjimenez75 This program is distributed in the hope that it will be useful, 302*61ef61f6Sdavidjimenez75 but WITHOUT ANY WARRANTY; without even the implied warranty of 303*61ef61f6Sdavidjimenez75 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304*61ef61f6Sdavidjimenez75 GNU General Public License for more details. 305*61ef61f6Sdavidjimenez75 306*61ef61f6Sdavidjimenez75 You should have received a copy of the GNU General Public License along 307*61ef61f6Sdavidjimenez75 with this program; if not, write to the Free Software Foundation, Inc., 308*61ef61f6Sdavidjimenez75 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309*61ef61f6Sdavidjimenez75 310*61ef61f6Sdavidjimenez75Also add information on how to contact you by electronic and paper mail. 311*61ef61f6Sdavidjimenez75 312*61ef61f6Sdavidjimenez75If the program is interactive, make it output a short notice like this 313*61ef61f6Sdavidjimenez75when it starts in an interactive mode: 314*61ef61f6Sdavidjimenez75 315*61ef61f6Sdavidjimenez75 Gnomovision version 69, Copyright (C) year name of author 316*61ef61f6Sdavidjimenez75 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317*61ef61f6Sdavidjimenez75 This is free software, and you are welcome to redistribute it 318*61ef61f6Sdavidjimenez75 under certain conditions; type `show c' for details. 319*61ef61f6Sdavidjimenez75 320*61ef61f6Sdavidjimenez75The hypothetical commands `show w' and `show c' should show the appropriate 321*61ef61f6Sdavidjimenez75parts of the General Public License. Of course, the commands you use may 322*61ef61f6Sdavidjimenez75be called something other than `show w' and `show c'; they could even be 323*61ef61f6Sdavidjimenez75mouse-clicks or menu items--whatever suits your program. 324*61ef61f6Sdavidjimenez75 325*61ef61f6Sdavidjimenez75You should also get your employer (if you work as a programmer) or your 326*61ef61f6Sdavidjimenez75school, if any, to sign a "copyright disclaimer" for the program, if 327*61ef61f6Sdavidjimenez75necessary. Here is a sample; alter the names: 328*61ef61f6Sdavidjimenez75 329*61ef61f6Sdavidjimenez75 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330*61ef61f6Sdavidjimenez75 `Gnomovision' (which makes passes at compilers) written by James Hacker. 331*61ef61f6Sdavidjimenez75 332*61ef61f6Sdavidjimenez75 <signature of Ty Coon>, 1 April 1989 333*61ef61f6Sdavidjimenez75 Ty Coon, President of Vice 334*61ef61f6Sdavidjimenez75 335*61ef61f6Sdavidjimenez75This General Public License does not permit incorporating your program into 336*61ef61f6Sdavidjimenez75proprietary programs. If your program is a subroutine library, you may 337*61ef61f6Sdavidjimenez75consider it more useful to permit linking proprietary applications with the 338*61ef61f6Sdavidjimenez75library. If this is what you want to do, use the GNU Lesser General 339*61ef61f6Sdavidjimenez75Public License instead of this License. 340