claudio@60: GNU GENERAL PUBLIC LICENSE claudio@60: Version 2, June 1991 claudio@60: claudio@60: Copyright (C) 1989, 1991 Free Software Foundation, Inc., claudio@60: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA claudio@60: Everyone is permitted to copy and distribute verbatim copies claudio@60: of this license document, but changing it is not allowed. claudio@60: claudio@60: Preamble claudio@60: claudio@60: The licenses for most software are designed to take away your claudio@60: freedom to share and change it. By contrast, the GNU General Public claudio@60: License is intended to guarantee your freedom to share and change free claudio@60: software--to make sure the software is free for all its users. This claudio@60: General Public License applies to most of the Free Software claudio@60: Foundation's software and to any other program whose authors commit to claudio@60: using it. (Some other Free Software Foundation software is covered by claudio@60: the GNU Lesser General Public License instead.) You can apply it to claudio@60: your programs, too. claudio@60: claudio@60: When we speak of free software, we are referring to freedom, not claudio@60: price. Our General Public Licenses are designed to make sure that you claudio@60: have the freedom to distribute copies of free software (and charge for claudio@60: this service if you wish), that you receive source code or can get it claudio@60: if you want it, that you can change the software or use pieces of it claudio@60: in new free programs; and that you know you can do these things. claudio@60: claudio@60: To protect your rights, we need to make restrictions that forbid claudio@60: anyone to deny you these rights or to ask you to surrender the rights. claudio@60: These restrictions translate to certain responsibilities for you if you claudio@60: distribute copies of the software, or if you modify it. claudio@60: claudio@60: For example, if you distribute copies of such a program, whether claudio@60: gratis or for a fee, you must give the recipients all the rights that claudio@60: you have. You must make sure that they, too, receive or can get the claudio@60: source code. And you must show them these terms so they know their claudio@60: rights. claudio@60: claudio@60: We protect your rights with two steps: (1) copyright the software, and claudio@60: (2) offer you this license which gives you legal permission to copy, claudio@60: distribute and/or modify the software. claudio@60: claudio@60: Also, for each author's protection and ours, we want to make certain claudio@60: that everyone understands that there is no warranty for this free claudio@60: software. If the software is modified by someone else and passed on, we claudio@60: want its recipients to know that what they have is not the original, so claudio@60: that any problems introduced by others will not reflect on the original claudio@60: authors' reputations. claudio@60: claudio@60: Finally, any free program is threatened constantly by software claudio@60: patents. We wish to avoid the danger that redistributors of a free claudio@60: program will individually obtain patent licenses, in effect making the claudio@60: program proprietary. To prevent this, we have made it clear that any claudio@60: patent must be licensed for everyone's free use or not licensed at all. claudio@60: claudio@60: The precise terms and conditions for copying, distribution and claudio@60: modification follow. claudio@60: claudio@60: GNU GENERAL PUBLIC LICENSE claudio@60: TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION claudio@60: claudio@60: 0. This License applies to any program or other work which contains claudio@60: a notice placed by the copyright holder saying it may be distributed claudio@60: under the terms of this General Public License. The "Program", below, claudio@60: refers to any such program or work, and a "work based on the Program" claudio@60: means either the Program or any derivative work under copyright law: claudio@60: that is to say, a work containing the Program or a portion of it, claudio@60: either verbatim or with modifications and/or translated into another claudio@60: language. (Hereinafter, translation is included without limitation in claudio@60: the term "modification".) Each licensee is addressed as "you". claudio@60: claudio@60: Activities other than copying, distribution and modification are not claudio@60: covered by this License; they are outside its scope. The act of claudio@60: running the Program is not restricted, and the output from the Program claudio@60: is covered only if its contents constitute a work based on the claudio@60: Program (independent of having been made by running the Program). claudio@60: Whether that is true depends on what the Program does. claudio@60: claudio@60: 1. You may copy and distribute verbatim copies of the Program's claudio@60: source code as you receive it, in any medium, provided that you claudio@60: conspicuously and appropriately publish on each copy an appropriate claudio@60: copyright notice and disclaimer of warranty; keep intact all the claudio@60: notices that refer to this License and to the absence of any warranty; claudio@60: and give any other recipients of the Program a copy of this License claudio@60: along with the Program. claudio@60: claudio@60: You may charge a fee for the physical act of transferring a copy, and claudio@60: you may at your option offer warranty protection in exchange for a fee. claudio@60: claudio@60: 2. You may modify your copy or copies of the Program or any portion claudio@60: of it, thus forming a work based on the Program, and copy and claudio@60: distribute such modifications or work under the terms of Section 1 claudio@60: above, provided that you also meet all of these conditions: claudio@60: claudio@60: a) You must cause the modified files to carry prominent notices claudio@60: stating that you changed the files and the date of any change. claudio@60: claudio@60: b) You must cause any work that you distribute or publish, that in claudio@60: whole or in part contains or is derived from the Program or any claudio@60: part thereof, to be licensed as a whole at no charge to all third claudio@60: parties under the terms of this License. claudio@60: claudio@60: c) If the modified program normally reads commands interactively claudio@60: when run, you must cause it, when started running for such claudio@60: interactive use in the most ordinary way, to print or display an claudio@60: announcement including an appropriate copyright notice and a claudio@60: notice that there is no warranty (or else, saying that you provide claudio@60: a warranty) and that users may redistribute the program under claudio@60: these conditions, and telling the user how to view a copy of this claudio@60: License. (Exception: if the Program itself is interactive but claudio@60: does not normally print such an announcement, your work based on claudio@60: the Program is not required to print an announcement.) claudio@60: claudio@60: These requirements apply to the modified work as a whole. If claudio@60: identifiable sections of that work are not derived from the Program, claudio@60: and can be reasonably considered independent and separate works in claudio@60: themselves, then this License, and its terms, do not apply to those claudio@60: sections when you distribute them as separate works. But when you claudio@60: distribute the same sections as part of a whole which is a work based claudio@60: on the Program, the distribution of the whole must be on the terms of claudio@60: this License, whose permissions for other licensees extend to the claudio@60: entire whole, and thus to each and every part regardless of who wrote it. claudio@60: claudio@60: Thus, it is not the intent of this section to claim rights or contest claudio@60: your rights to work written entirely by you; rather, the intent is to claudio@60: exercise the right to control the distribution of derivative or claudio@60: collective works based on the Program. claudio@60: claudio@60: In addition, mere aggregation of another work not based on the Program claudio@60: with the Program (or with a work based on the Program) on a volume of claudio@60: a storage or distribution medium does not bring the other work under claudio@60: the scope of this License. claudio@60: claudio@60: 3. You may copy and distribute the Program (or a work based on it, claudio@60: under Section 2) in object code or executable form under the terms of claudio@60: Sections 1 and 2 above provided that you also do one of the following: claudio@60: claudio@60: a) Accompany it with the complete corresponding machine-readable claudio@60: source code, which must be distributed under the terms of Sections claudio@60: 1 and 2 above on a medium customarily used for software interchange; or, claudio@60: claudio@60: b) Accompany it with a written offer, valid for at least three claudio@60: years, to give any third party, for a charge no more than your claudio@60: cost of physically performing source distribution, a complete claudio@60: machine-readable copy of the corresponding source code, to be claudio@60: distributed under the terms of Sections 1 and 2 above on a medium claudio@60: customarily used for software interchange; or, claudio@60: claudio@60: c) Accompany it with the information you received as to the offer claudio@60: to distribute corresponding source code. (This alternative is claudio@60: allowed only for noncommercial distribution and only if you claudio@60: received the program in object code or executable form with such claudio@60: an offer, in accord with Subsection b above.) claudio@60: claudio@60: The source code for a work means the preferred form of the work for claudio@60: making modifications to it. For an executable work, complete source claudio@60: code means all the source code for all modules it contains, plus any claudio@60: associated interface definition files, plus the scripts used to claudio@60: control compilation and installation of the executable. However, as a claudio@60: special exception, the source code distributed need not include claudio@60: anything that is normally distributed (in either source or binary claudio@60: form) with the major components (compiler, kernel, and so on) of the claudio@60: operating system on which the executable runs, unless that component claudio@60: itself accompanies the executable. claudio@60: claudio@60: If distribution of executable or object code is made by offering claudio@60: access to copy from a designated place, then offering equivalent claudio@60: access to copy the source code from the same place counts as claudio@60: distribution of the source code, even though third parties are not claudio@60: compelled to copy the source along with the object code. claudio@60: claudio@60: 4. You may not copy, modify, sublicense, or distribute the Program claudio@60: except as expressly provided under this License. Any attempt claudio@60: otherwise to copy, modify, sublicense or distribute the Program is claudio@60: void, and will automatically terminate your rights under this License. claudio@60: However, parties who have received copies, or rights, from you under claudio@60: this License will not have their licenses terminated so long as such claudio@60: parties remain in full compliance. claudio@60: claudio@60: 5. You are not required to accept this License, since you have not claudio@60: signed it. However, nothing else grants you permission to modify or claudio@60: distribute the Program or its derivative works. These actions are claudio@60: prohibited by law if you do not accept this License. Therefore, by claudio@60: modifying or distributing the Program (or any work based on the claudio@60: Program), you indicate your acceptance of this License to do so, and claudio@60: all its terms and conditions for copying, distributing or modifying claudio@60: the Program or works based on it. claudio@60: claudio@60: 6. Each time you redistribute the Program (or any work based on the claudio@60: Program), the recipient automatically receives a license from the claudio@60: original licensor to copy, distribute or modify the Program subject to claudio@60: these terms and conditions. You may not impose any further claudio@60: restrictions on the recipients' exercise of the rights granted herein. claudio@60: You are not responsible for enforcing compliance by third parties to claudio@60: this License. claudio@60: claudio@60: 7. If, as a consequence of a court judgment or allegation of patent claudio@60: infringement or for any other reason (not limited to patent issues), claudio@60: conditions are imposed on you (whether by court order, agreement or claudio@60: otherwise) that contradict the conditions of this License, they do not claudio@60: excuse you from the conditions of this License. If you cannot claudio@60: distribute so as to satisfy simultaneously your obligations under this claudio@60: License and any other pertinent obligations, then as a consequence you claudio@60: may not distribute the Program at all. For example, if a patent claudio@60: license would not permit royalty-free redistribution of the Program by claudio@60: all those who receive copies directly or indirectly through you, then claudio@60: the only way you could satisfy both it and this License would be to claudio@60: refrain entirely from distribution of the Program. claudio@60: claudio@60: If any portion of this section is held invalid or unenforceable under claudio@60: any particular circumstance, the balance of the section is intended to claudio@60: apply and the section as a whole is intended to apply in other claudio@60: circumstances. claudio@60: claudio@60: It is not the purpose of this section to induce you to infringe any claudio@60: patents or other property right claims or to contest validity of any claudio@60: such claims; this section has the sole purpose of protecting the claudio@60: integrity of the free software distribution system, which is claudio@60: implemented by public license practices. Many people have made claudio@60: generous contributions to the wide range of software distributed claudio@60: through that system in reliance on consistent application of that claudio@60: system; it is up to the author/donor to decide if he or she is willing claudio@60: to distribute software through any other system and a licensee cannot claudio@60: impose that choice. claudio@60: claudio@60: This section is intended to make thoroughly clear what is believed to claudio@60: be a consequence of the rest of this License. claudio@60: claudio@60: 8. If the distribution and/or use of the Program is restricted in claudio@60: certain countries either by patents or by copyrighted interfaces, the claudio@60: original copyright holder who places the Program under this License claudio@60: may add an explicit geographical distribution limitation excluding claudio@60: those countries, so that distribution is permitted only in or among claudio@60: countries not thus excluded. In such case, this License incorporates claudio@60: the limitation as if written in the body of this License. claudio@60: claudio@60: 9. The Free Software Foundation may publish revised and/or new versions claudio@60: of the General Public License from time to time. Such new versions will claudio@60: be similar in spirit to the present version, but may differ in detail to claudio@60: address new problems or concerns. claudio@60: claudio@60: Each version is given a distinguishing version number. If the Program claudio@60: specifies a version number of this License which applies to it and "any claudio@60: later version", you have the option of following the terms and conditions claudio@60: either of that version or of any later version published by the Free claudio@60: Software Foundation. If the Program does not specify a version number of claudio@60: this License, you may choose any version ever published by the Free Software claudio@60: Foundation. claudio@60: claudio@60: 10. If you wish to incorporate parts of the Program into other free claudio@60: programs whose distribution conditions are different, write to the author claudio@60: to ask for permission. For software which is copyrighted by the Free claudio@60: Software Foundation, write to the Free Software Foundation; we sometimes claudio@60: make exceptions for this. Our decision will be guided by the two goals claudio@60: of preserving the free status of all derivatives of our free software and claudio@60: of promoting the sharing and reuse of software generally. claudio@60: claudio@60: NO WARRANTY claudio@60: claudio@60: 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY claudio@60: FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN claudio@60: OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES claudio@60: PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED claudio@60: OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF claudio@60: MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS claudio@60: TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE claudio@60: PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, claudio@60: REPAIR OR CORRECTION. claudio@60: claudio@60: 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING claudio@60: WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR claudio@60: REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, claudio@60: INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING claudio@60: OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED claudio@60: TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY claudio@60: YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER claudio@60: PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE claudio@60: POSSIBILITY OF SUCH DAMAGES. claudio@60: claudio@60: END OF TERMS AND CONDITIONS claudio@60: claudio@60: How to Apply These Terms to Your New Programs claudio@60: claudio@60: If you develop a new program, and you want it to be of the greatest claudio@60: possible use to the public, the best way to achieve this is to make it claudio@60: free software which everyone can redistribute and change under these terms. claudio@60: claudio@60: To do so, attach the following notices to the program. It is safest claudio@60: to attach them to the start of each source file to most effectively claudio@60: convey the exclusion of warranty; and each file should have at least claudio@60: the "copyright" line and a pointer to where the full notice is found. claudio@60: claudio@60: claudio@60: Copyright (C) claudio@60: claudio@60: This program is free software; you can redistribute it and/or modify claudio@60: it under the terms of the GNU General Public License as published by claudio@60: the Free Software Foundation; either version 2 of the License, or claudio@60: (at your option) any later version. claudio@60: claudio@60: This program is distributed in the hope that it will be useful, claudio@60: but WITHOUT ANY WARRANTY; without even the implied warranty of claudio@60: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the claudio@60: GNU General Public License for more details. claudio@60: claudio@60: You should have received a copy of the GNU General Public License along claudio@60: with this program; if not, write to the Free Software Foundation, Inc., claudio@60: 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. claudio@60: claudio@60: Also add information on how to contact you by electronic and paper mail. claudio@60: claudio@60: If the program is interactive, make it output a short notice like this claudio@60: when it starts in an interactive mode: claudio@60: claudio@60: Gnomovision version 69, Copyright (C) year name of author claudio@60: Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. claudio@60: This is free software, and you are welcome to redistribute it claudio@60: under certain conditions; type `show c' for details. claudio@60: claudio@60: The hypothetical commands `show w' and `show c' should show the appropriate claudio@60: parts of the General Public License. Of course, the commands you use may claudio@60: be called something other than `show w' and `show c'; they could even be claudio@60: mouse-clicks or menu items--whatever suits your program. claudio@60: claudio@60: You should also get your employer (if you work as a programmer) or your claudio@60: school, if any, to sign a "copyright disclaimer" for the program, if claudio@60: necessary. Here is a sample; alter the names: claudio@60: claudio@60: Yoyodyne, Inc., hereby disclaims all copyright interest in the program claudio@60: `Gnomovision' (which makes passes at compilers) written by James Hacker. claudio@60: claudio@60: , 1 April 1989 claudio@60: Ty Coon, President of Vice claudio@60: claudio@60: This General Public License does not permit incorporating your program into claudio@60: proprietary programs. If your program is a subroutine library, you may claudio@60: consider it more useful to permit linking proprietary applications with the claudio@60: library. If this is what you want to do, use the GNU Lesser General claudio@60: Public License instead of this License.