Version 2, June 1991 1989, 1991 Free Software Foundation, Inc.

Free Software Foundation, Inc.51 Franklin Street, Fifth Floor,Boston,MA 02110-1301 USA

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Version 2, June 1991

The licenses for most software are designed to take away yourfreedom to share and change it. By contrast, the GNU General Public License isintended to guarantee your freedom to share and changefree software - to make sure the software is free for all its users.This General Public License applies to most of the Free SoftwareFoundation's software and to any other program whose authors committo using it. (Some other Free Software Foundation software is coveredby the GNU Library General Public License instead.) You can apply itto your programs, too. When we speak of free software, we are referring to freedom, not price.Our General Public Licenses are designed to make sure that you have thefreedom to distribute copies of free software (and charge for thisservice if you wish), that you receive source code or can get it if youwant it, that you can change the software or use pieces of it in new freeprograms; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyoneto deny you these rights or to ask you to surrender the rights. Theserestrictions translate to certain responsibilities for you if you distributecopies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis orfor a fee, you must give the recipients all the rights that you have. Youmust make sure that they, too, receive or can get the source code. And youmust show them these terms so they know their rights. We protect your rights with two steps: copyright the software, and offer you this license which gives you legal permission to copy,distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain thateveryone understands that there is no warranty for this free software. Ifthe software is modified by someone else and passed on, we want itsrecipients to know that what they have is not the original, so that anyproblems introduced by others will not reflect on the original authors'reputations. Finally, any free program is threatened constantly by software patents.We wish to avoid the danger that redistributors of a free program willindividually obtain patent licenses, in effect making the programproprietary. To prevent this, we have made it clear that any patent must belicensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modificationfollow.

This License applies to any program or other work which contains a noticeplaced by the copyright holder saying it may be distributed under the termsof this General Public License. TheProgram, below, refers to any suchprogram or work, and awork based on the Programmeans eitherthe Program or any derivative work under copyright law: that is to say, awork containing the Program or a portion of it, either verbatim or withmodifications and/or translated into another language. (Hereinafter, translationis included without limitation in the termmodification.) Each licensee is addressed asyou. Activities other than copying, distribution and modification are not covered bythis License; they are outside its scope. The act of running the Program is notrestricted, and the output from the Program is covered only if its contentsconstitute a work based on the Program (independent of having been made by runningthe Program). Whether that is true depends on what the Program does.

You may copy and distribute verbatim copies of the Program's source code as youreceive it, in any medium, provided that you conspicuously and appropriatelypublish on each copy an appropriate copyright notice and disclaimer of warranty;keep intact all the notices that refer to this License and to the absence of anywarranty; and give any other recipients of the Program a copy of this Licensealong with the Program. You may charge a fee for the physical act of transferring a copy, and you may atyour option offer warranty protection in exchange for a fee.

You may modify your copy or copies of the Program or any portion of it, thusforming a work based on the Program, and copy and distribute such modificationsor work under the terms ofSection 1above, providedthat you also meet all of these conditions: You must cause the modified files to carry prominent notices stating thatyou changed the files and the date of any change. You must cause any work that you distribute or publish, that in whole orin part contains or is derived from the Program or any part thereof, to belicensed as a whole at no charge to all third parties under the terms ofthis License. If the modified program normally reads commands interactively when run, youmust cause it, when started running for such interactive use in the mostordinary way, to print or display an announcement including an appropriatecopyright notice and a notice that there is no warranty (or else, sayingthat you provide a warranty) and that users may redistribute the programunder these conditions, and telling the user how to view a copy of thisLicense. (Exception: If the Program itself is interactive but does notnormally print such an announcement, your work based on the Program is notrequired to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sectionsof that work are not derived from the Program, and can be reasonably consideredindependent and separate works in themselves, then this License, and its terms,do not apply to those sections when you distribute them as separate works. But whenyou distribute the same sections as part of a whole which is a work based on theProgram, the distribution of the whole must be on the terms of this License, whosepermissions for other licensees extend to the entire whole, and thus to each andevery part regardless of who wrote it. Thus, it is not the intent of this section to claim rights or contest your rightsto work written entirely by you; rather, the intent is to exercise the right to controlthe distribution of derivative or collective works based on the Program. In addition, mere aggregation of another work not based on the Program with the Program(or with a work based on the Program) on a volume of a storage or distribution mediumdoes not bring the other work under the scope of this License.

You may copy and distribute the Program (or a work based on it, underSection 2in object code or executable form under the terms ofSections 1and2above provided that you also do one of the following: Accompany it with the complete corresponding machine-readable source code, whichmust be distributed under the terms of Sections 1 and 2 above on a mediumcustomarily used for software interchange; or, Accompany it with a written offer, valid for at least three years, to give anythird party, for a charge no more than your cost of physically performing sourcedistribution, a complete machine-readable copy of the corresponding source code,to be distributed under the terms of Sections 1 and 2 above on a medium customarilyused for software interchange; or, Accompany it with the information you received as to the offer to distributecorresponding source code. (This alternative is allowed only for noncommercialdistribution and only if you received the program in object code or executable formwith such an offer, in accord with Subsection b above.) The source code for a work means the preferred form of the work for making modificationsto it. For an executable work, complete source code means all the source code for all modulesit contains, plus any associated interface definition files, plus the scripts used to controlcompilation and installation of the executable. However, as a special exception, the sourcecode distributed need not include anything that is normally distributed (in either source orbinary form) with the major components (compiler, kernel, and so on) of the operating systemon which the executable runs, unless that component itself accompanies the executable. If distribution of executable or object code is made by offering access to copy from adesignated place, then offering equivalent access to copy the source code from the same placecounts as distribution of the source code, even though third parties are not compelled tocopy the source along with the object code.

You may not copy, modify, sublicense, or distribute the Program except as expressly providedunder this License. Any attempt otherwise to copy, modify, sublicense or distribute theProgram is void, and will automatically terminate your rights under this License. However,parties who have received copies, or rights, from you under this License will not have theirlicenses terminated so long as such parties remain in full compliance.

You are not required to accept this License, since you have not signed it. However, nothingelse grants you permission to modify or distribute the Program or its derivative works.These actions are prohibited by law if you do not accept this License. Therefore, by modifyingor distributing the Program (or any work based on the Program), you indicate your acceptanceof this License to do so, and all its terms and conditions for copying, distributing ormodifying the Program or works based on it.

Each time you redistribute the Program (or any work based on the Program), the recipientautomatically receives a license from the original licensor to copy, distribute or modifythe Program subject to these terms and conditions. You may not impose any further restrictionson the recipients' exercise of the rights granted herein. You are not responsible for enforcingcompliance by third parties to this License.

If, as a consequence of a court judgment or allegation of patent infringement or for any otherreason (not limited to patent issues), conditions are imposed on you (whether by court order,agreement or otherwise) that contradict the conditions of this License, they do not excuse youfrom the conditions of this License. If you cannot distribute so as to satisfy simultaneouslyyour obligations under this License and any other pertinent obligations, then as a consequenceyou may not distribute the Program at all. For example, if a patent license would not permitroyalty-free redistribution of the Program by all those who receive copies directly orindirectly through you, then the only way you could satisfy both it and this License would beto refrain entirely from distribution of the Program. If any portion of this section is held invalid or unenforceable under any particular circumstance,the balance of the section is intended to apply and the section as a whole is intended to applyin other circumstances. It is not the purpose of this section to induce you to infringe any patents or other propertyright claims or to contest validity of any such claims; this section has the sole purpose ofprotecting the integrity of the free software distribution system, which is implemented by publiclicense practices. Many people have made generous contributions to the wide range of softwaredistributed through that system in reliance on consistent application of that system; it is upto the author/donor to decide if he or she is willing to distribute software through any othersystem and a licensee cannot impose that choice. This section is intended to make thoroughly clear what is believed to be a consequence of therest of this License.

If the distribution and/or use of the Program is restricted in certain countries either by patentsor by copyrighted interfaces, the original copyright holder who places the Program under this Licensemay add an explicit geographical distribution limitation excluding those countries, so thatdistribution is permitted only in or among countries not thus excluded. In such case, this Licenseincorporates the limitation as if written in the body of this License.

The Free Software Foundation may publish revised and/or new versions of the General Public Licensefrom time to time. Such new versions will be similar in spirit to the present version, but may differin detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number ofthis License which applies to it andany later version, you have the option of following the termsand conditions either of that version or of any later version published by the Free SoftwareFoundation. If the Program does not specify a version number of this License, you may choose anyversion ever published by the Free Software Foundation.

If you wish to incorporate parts of the Program into other free programs whose distributionconditions are different, write to the author to ask for permission. For software which is copyrightedby the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptionsfor this. Our decision will be guided by the two goals of preserving the free status of allderivatives of our free software and of promoting the sharing and reuse of software generally.

BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENTPERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OROTHER PARTIES PROVIDE THE PROGRAMAS ISWITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULARPURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THEPROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, ORANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOUFOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THEUSE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDEREDINACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITHANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCHDAMAGES. END OF TERMS AND CONDITIONS

If you develop a new program, and you want it to be of the greatestpossible use to the public, the best way to achieve this is to make itfree software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safestto attach them to the start of each source file to most effectivelyconvey the exclusion of warranty; and each file should have at leastthecopyrightline and a pointer to where the full notice is found. <one line to give the program's name and a brief idea of what it does.>Copyright (C) <year> <name of author> This program is free software; you can redistribute it and/or modifyit under the terms of the GNU General Public License as published bythe Free Software Foundation; either version 2 of the License, or(at your option) any later version. This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details. You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like thiswhen it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of authorGnomovision comes with ABSOLUTELY NO WARRANTY; for details typeshow w.This is free software, and you are welcome to redistribute itunder certain conditions; typeshow cfor details. The hypothetical commandsshow wandshow cshouldshow the appropriate parts of the General Public License. Of course, the commands youuse may be called something other thanshow wandshow c;they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or yourschool, if any, to sign acopyright disclaimerfor the program, ifnecessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the programGnomovision(which makes passes at compilers) written by James Hacker. <signature of Ty Coon>, 1 April 1989Ty Coon, President of Vice This General Public License does not permit incorporating your program intoproprietary programs. If your program is a subroutine library, you mayconsider it more useful to permit linking proprietary applications with thelibrary. If this is what you want to do, use the GNU Library GeneralPublic License instead of this License.