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