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