estrain@2: GNU GENERAL PUBLIC LICENSE estrain@2: Version 2, June 1991 estrain@2: estrain@2: Copyright (C) 1989, 1991 Free Software Foundation, Inc., estrain@2: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA estrain@2: Everyone is permitted to copy and distribute verbatim copies estrain@2: of this license document, but changing it is not allowed. estrain@2: estrain@2: Preamble estrain@2: estrain@2: The licenses for most software are designed to take away your estrain@2: freedom to share and change it. By contrast, the GNU General Public estrain@2: License is intended to guarantee your freedom to share and change free estrain@2: software--to make sure the software is free for all its users. This estrain@2: General Public License applies to most of the Free Software estrain@2: Foundation's software and to any other program whose authors commit to estrain@2: using it. (Some other Free Software Foundation software is covered by estrain@2: the GNU Lesser General Public License instead.) You can apply it to estrain@2: your programs, too. estrain@2: estrain@2: When we speak of free software, we are referring to freedom, not estrain@2: price. Our General Public Licenses are designed to make sure that you estrain@2: have the freedom to distribute copies of free software (and charge for estrain@2: this service if you wish), that you receive source code or can get it estrain@2: if you want it, that you can change the software or use pieces of it estrain@2: in new free programs; and that you know you can do these things. estrain@2: estrain@2: To protect your rights, we need to make restrictions that forbid estrain@2: anyone to deny you these rights or to ask you to surrender the rights. estrain@2: These restrictions translate to certain responsibilities for you if you estrain@2: distribute copies of the software, or if you modify it. estrain@2: estrain@2: For example, if you distribute copies of such a program, whether estrain@2: gratis or for a fee, you must give the recipients all the rights that estrain@2: you have. You must make sure that they, too, receive or can get the estrain@2: source code. And you must show them these terms so they know their estrain@2: rights. estrain@2: estrain@2: We protect your rights with two steps: (1) copyright the software, and estrain@2: (2) offer you this license which gives you legal permission to copy, estrain@2: distribute and/or modify the software. estrain@2: estrain@2: Also, for each author's protection and ours, we want to make certain estrain@2: that everyone understands that there is no warranty for this free estrain@2: software. If the software is modified by someone else and passed on, we estrain@2: want its recipients to know that what they have is not the original, so estrain@2: that any problems introduced by others will not reflect on the original estrain@2: authors' reputations. estrain@2: estrain@2: Finally, any free program is threatened constantly by software estrain@2: patents. We wish to avoid the danger that redistributors of a free estrain@2: program will individually obtain patent licenses, in effect making the estrain@2: program proprietary. To prevent this, we have made it clear that any estrain@2: patent must be licensed for everyone's free use or not licensed at all. estrain@2: estrain@2: The precise terms and conditions for copying, distribution and estrain@2: modification follow. estrain@2: estrain@2: GNU GENERAL PUBLIC LICENSE estrain@2: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION estrain@2: estrain@2: 0. This License applies to any program or other work which contains estrain@2: a notice placed by the copyright holder saying it may be distributed estrain@2: under the terms of this General Public License. The "Program", below, estrain@2: refers to any such program or work, and a "work based on the Program" estrain@2: means either the Program or any derivative work under copyright law: estrain@2: that is to say, a work containing the Program or a portion of it, estrain@2: either verbatim or with modifications and/or translated into another estrain@2: language. (Hereinafter, translation is included without limitation in estrain@2: the term "modification".) Each licensee is addressed as "you". estrain@2: estrain@2: Activities other than copying, distribution and modification are not estrain@2: covered by this License; they are outside its scope. The act of estrain@2: running the Program is not restricted, and the output from the Program estrain@2: is covered only if its contents constitute a work based on the estrain@2: Program (independent of having been made by running the Program). estrain@2: Whether that is true depends on what the Program does. estrain@2: estrain@2: 1. You may copy and distribute verbatim copies of the Program's estrain@2: source code as you receive it, in any medium, provided that you estrain@2: conspicuously and appropriately publish on each copy an appropriate estrain@2: copyright notice and disclaimer of warranty; keep intact all the estrain@2: notices that refer to this License and to the absence of any warranty; estrain@2: and give any other recipients of the Program a copy of this License estrain@2: along with the Program. estrain@2: estrain@2: You may charge a fee for the physical act of transferring a copy, and estrain@2: you may at your option offer warranty protection in exchange for a fee. estrain@2: estrain@2: 2. You may modify your copy or copies of the Program or any portion estrain@2: of it, thus forming a work based on the Program, and copy and estrain@2: distribute such modifications or work under the terms of Section 1 estrain@2: above, provided that you also meet all of these conditions: estrain@2: estrain@2: a) You must cause the modified files to carry prominent notices estrain@2: stating that you changed the files and the date of any change. estrain@2: estrain@2: b) You must cause any work that you distribute or publish, that in estrain@2: whole or in part contains or is derived from the Program or any estrain@2: part thereof, to be licensed as a whole at no charge to all third estrain@2: parties under the terms of this License. estrain@2: estrain@2: c) If the modified program normally reads commands interactively estrain@2: when run, you must cause it, when started running for such estrain@2: interactive use in the most ordinary way, to print or display an estrain@2: announcement including an appropriate copyright notice and a estrain@2: notice that there is no warranty (or else, saying that you provide estrain@2: a warranty) and that users may redistribute the program under estrain@2: these conditions, and telling the user how to view a copy of this estrain@2: License. (Exception: if the Program itself is interactive but estrain@2: does not normally print such an announcement, your work based on estrain@2: the Program is not required to print an announcement.) estrain@2: estrain@2: These requirements apply to the modified work as a whole. If estrain@2: identifiable sections of that work are not derived from the Program, estrain@2: and can be reasonably considered independent and separate works in estrain@2: themselves, then this License, and its terms, do not apply to those estrain@2: sections when you distribute them as separate works. But when you estrain@2: distribute the same sections as part of a whole which is a work based estrain@2: on the Program, the distribution of the whole must be on the terms of estrain@2: this License, whose permissions for other licensees extend to the estrain@2: entire whole, and thus to each and every part regardless of who wrote it. estrain@2: estrain@2: Thus, it is not the intent of this section to claim rights or contest estrain@2: your rights to work written entirely by you; rather, the intent is to estrain@2: exercise the right to control the distribution of derivative or estrain@2: collective works based on the Program. estrain@2: estrain@2: In addition, mere aggregation of another work not based on the Program estrain@2: with the Program (or with a work based on the Program) on a volume of estrain@2: a storage or distribution medium does not bring the other work under estrain@2: the scope of this License. estrain@2: estrain@2: 3. You may copy and distribute the Program (or a work based on it, estrain@2: under Section 2) in object code or executable form under the terms of estrain@2: Sections 1 and 2 above provided that you also do one of the following: estrain@2: estrain@2: a) Accompany it with the complete corresponding machine-readable estrain@2: source code, which must be distributed under the terms of Sections estrain@2: 1 and 2 above on a medium customarily used for software interchange; or, estrain@2: estrain@2: b) Accompany it with a written offer, valid for at least three estrain@2: years, to give any third party, for a charge no more than your estrain@2: cost of physically performing source distribution, a complete estrain@2: machine-readable copy of the corresponding source code, to be estrain@2: distributed under the terms of Sections 1 and 2 above on a medium estrain@2: customarily used for software interchange; or, estrain@2: estrain@2: c) Accompany it with the information you received as to the offer estrain@2: to distribute corresponding source code. (This alternative is estrain@2: allowed only for noncommercial distribution and only if you estrain@2: received the program in object code or executable form with such estrain@2: an offer, in accord with Subsection b above.) estrain@2: estrain@2: The source code for a work means the preferred form of the work for estrain@2: making modifications to it. For an executable work, complete source estrain@2: code means all the source code for all modules it contains, plus any estrain@2: associated interface definition files, plus the scripts used to estrain@2: control compilation and installation of the executable. However, as a estrain@2: special exception, the source code distributed need not include estrain@2: anything that is normally distributed (in either source or binary estrain@2: form) with the major components (compiler, kernel, and so on) of the estrain@2: operating system on which the executable runs, unless that component estrain@2: itself accompanies the executable. estrain@2: estrain@2: If distribution of executable or object code is made by offering estrain@2: access to copy from a designated place, then offering equivalent estrain@2: access to copy the source code from the same place counts as estrain@2: distribution of the source code, even though third parties are not estrain@2: compelled to copy the source along with the object code. estrain@2: estrain@2: 4. You may not copy, modify, sublicense, or distribute the Program estrain@2: except as expressly provided under this License. Any attempt estrain@2: otherwise to copy, modify, sublicense or distribute the Program is estrain@2: void, and will automatically terminate your rights under this License. estrain@2: However, parties who have received copies, or rights, from you under estrain@2: this License will not have their licenses terminated so long as such estrain@2: parties remain in full compliance. estrain@2: estrain@2: 5. You are not required to accept this License, since you have not estrain@2: signed it. However, nothing else grants you permission to modify or estrain@2: distribute the Program or its derivative works. These actions are estrain@2: prohibited by law if you do not accept this License. Therefore, by estrain@2: modifying or distributing the Program (or any work based on the estrain@2: Program), you indicate your acceptance of this License to do so, and estrain@2: all its terms and conditions for copying, distributing or modifying estrain@2: the Program or works based on it. estrain@2: estrain@2: 6. Each time you redistribute the Program (or any work based on the estrain@2: Program), the recipient automatically receives a license from the estrain@2: original licensor to copy, distribute or modify the Program subject to estrain@2: these terms and conditions. You may not impose any further estrain@2: restrictions on the recipients' exercise of the rights granted herein. estrain@2: You are not responsible for enforcing compliance by third parties to estrain@2: this License. estrain@2: estrain@2: 7. If, as a consequence of a court judgment or allegation of patent estrain@2: infringement or for any other reason (not limited to patent issues), estrain@2: conditions are imposed on you (whether by court order, agreement or estrain@2: otherwise) that contradict the conditions of this License, they do not estrain@2: excuse you from the conditions of this License. If you cannot estrain@2: distribute so as to satisfy simultaneously your obligations under this estrain@2: License and any other pertinent obligations, then as a consequence you estrain@2: may not distribute the Program at all. For example, if a patent estrain@2: license would not permit royalty-free redistribution of the Program by estrain@2: all those who receive copies directly or indirectly through you, then estrain@2: the only way you could satisfy both it and this License would be to estrain@2: refrain entirely from distribution of the Program. estrain@2: estrain@2: If any portion of this section is held invalid or unenforceable under estrain@2: any particular circumstance, the balance of the section is intended to estrain@2: apply and the section as a whole is intended to apply in other estrain@2: circumstances. estrain@2: estrain@2: It is not the purpose of this section to induce you to infringe any estrain@2: patents or other property right claims or to contest validity of any estrain@2: such claims; this section has the sole purpose of protecting the estrain@2: integrity of the free software distribution system, which is estrain@2: implemented by public license practices. Many people have made estrain@2: generous contributions to the wide range of software distributed estrain@2: through that system in reliance on consistent application of that estrain@2: system; it is up to the author/donor to decide if he or she is willing estrain@2: to distribute software through any other system and a licensee cannot estrain@2: impose that choice. estrain@2: estrain@2: This section is intended to make thoroughly clear what is believed to estrain@2: be a consequence of the rest of this License. estrain@2: estrain@2: 8. If the distribution and/or use of the Program is restricted in estrain@2: certain countries either by patents or by copyrighted interfaces, the estrain@2: original copyright holder who places the Program under this License estrain@2: may add an explicit geographical distribution limitation excluding estrain@2: those countries, so that distribution is permitted only in or among estrain@2: countries not thus excluded. In such case, this License incorporates estrain@2: the limitation as if written in the body of this License. estrain@2: estrain@2: 9. The Free Software Foundation may publish revised and/or new versions estrain@2: of the General Public License from time to time. Such new versions will estrain@2: be similar in spirit to the present version, but may differ in detail to estrain@2: address new problems or concerns. estrain@2: estrain@2: Each version is given a distinguishing version number. If the Program estrain@2: specifies a version number of this License which applies to it and "any estrain@2: later version", you have the option of following the terms and conditions estrain@2: either of that version or of any later version published by the Free estrain@2: Software Foundation. If the Program does not specify a version number of estrain@2: this License, you may choose any version ever published by the Free Software estrain@2: Foundation. estrain@2: estrain@2: 10. If you wish to incorporate parts of the Program into other free estrain@2: programs whose distribution conditions are different, write to the author estrain@2: to ask for permission. For software which is copyrighted by the Free estrain@2: Software Foundation, write to the Free Software Foundation; we sometimes estrain@2: make exceptions for this. Our decision will be guided by the two goals estrain@2: of preserving the free status of all derivatives of our free software and estrain@2: of promoting the sharing and reuse of software generally. estrain@2: estrain@2: NO WARRANTY estrain@2: estrain@2: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY estrain@2: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN estrain@2: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES estrain@2: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED estrain@2: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF estrain@2: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS estrain@2: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE estrain@2: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, estrain@2: REPAIR OR CORRECTION. estrain@2: estrain@2: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING estrain@2: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR estrain@2: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, estrain@2: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING estrain@2: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED estrain@2: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY estrain@2: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER estrain@2: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE estrain@2: POSSIBILITY OF SUCH DAMAGES. estrain@2: estrain@2: END OF TERMS AND CONDITIONS estrain@2: estrain@2: How to Apply These Terms to Your New Programs estrain@2: estrain@2: If you develop a new program, and you want it to be of the greatest estrain@2: possible use to the public, the best way to achieve this is to make it estrain@2: free software which everyone can redistribute and change under these terms. estrain@2: estrain@2: To do so, attach the following notices to the program. It is safest estrain@2: to attach them to the start of each source file to most effectively estrain@2: convey the exclusion of warranty; and each file should have at least estrain@2: the "copyright" line and a pointer to where the full notice is found. estrain@2: estrain@2: {description} estrain@2: Copyright (C) {year} {fullname} estrain@2: estrain@2: This program is free software; you can redistribute it and/or modify estrain@2: it under the terms of the GNU General Public License as published by estrain@2: the Free Software Foundation; either version 2 of the License, or estrain@2: (at your option) any later version. estrain@2: estrain@2: This program is distributed in the hope that it will be useful, estrain@2: but WITHOUT ANY WARRANTY; without even the implied warranty of estrain@2: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the estrain@2: GNU General Public License for more details. estrain@2: estrain@2: You should have received a copy of the GNU General Public License along estrain@2: with this program; if not, write to the Free Software Foundation, Inc., estrain@2: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. estrain@2: estrain@2: Also add information on how to contact you by electronic and paper mail. estrain@2: estrain@2: If the program is interactive, make it output a short notice like this estrain@2: when it starts in an interactive mode: estrain@2: estrain@2: Gnomovision version 69, Copyright (C) year name of author estrain@2: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. estrain@2: This is free software, and you are welcome to redistribute it estrain@2: under certain conditions; type `show c' for details. estrain@2: estrain@2: The hypothetical commands `show w' and `show c' should show the appropriate estrain@2: parts of the General Public License. Of course, the commands you use may estrain@2: be called something other than `show w' and `show c'; they could even be estrain@2: mouse-clicks or menu items--whatever suits your program. estrain@2: estrain@2: You should also get your employer (if you work as a programmer) or your estrain@2: school, if any, to sign a "copyright disclaimer" for the program, if estrain@2: necessary. Here is a sample; alter the names: estrain@2: estrain@2: Yoyodyne, Inc., hereby disclaims all copyright interest in the program estrain@2: `Gnomovision' (which makes passes at compilers) written by James Hacker. estrain@2: estrain@2: {signature of Ty Coon}, 1 April 1989 estrain@2: Ty Coon, President of Vice estrain@2: estrain@2: This General Public License does not permit incorporating your program into estrain@2: proprietary programs. If your program is a subroutine library, you may estrain@2: consider it more useful to permit linking proprietary applications with the estrain@2: library. If this is what you want to do, use the GNU Lesser General estrain@2: Public License instead of this License.