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GNU GENERAL PUBLIC LICENSE
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Version 2, June 1991
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Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not 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
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Free Software Foundation software is covered by the GNU Library General
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Public 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
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freedom to distribute copies of free software (and charge for this service
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if you wish), that you receive source code or can get it if you want it,
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that you can change the software or use pieces of it in new free programs;
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and that 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,
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distribute 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.
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If 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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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
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the 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
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either the Program or any derivative work under copyright law: that is to
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say, a work containing the Program or a portion of it, either verbatim
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or with modifications and/or translated into another language. (Hereinafter,
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translation is included without limitation in the term
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"modification".) Each licensee is addressed as "you".
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Activities other than copying, distribution and modification are not covered
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by this License; they are outside its scope. The act of running the
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Program is not restricted, and the output from the Program is covered only
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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 on
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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
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and 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 of
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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
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such 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
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use 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 no
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warranty (or else, saying that you provide a warranty) and that users
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may redistribute the program under these conditions, and telling the
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user how to view a copy of this License. (Exception: if the Program
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itself is interactive but does not normally print such an announcement,
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your work based on the Program is not required to print an
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announcement.)
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These requirements apply to the modified work as a whole. If identifiable
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sections of that work are not derived from the Program, and can be
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reasonably considered independent and separate works in themselves, then
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this License, and its terms, do not apply to those sections when you
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distribute them as separate works. But when you distribute the same sections
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as part of a whole which is a work based on the Program, the
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distribution of the whole must be on the terms of this License, whose
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permissions for other licensees extend to the entire whole, and thus to each
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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 your
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rights to work written entirely by you; rather, the intent is to exercise
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the
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right to control the distribution of derivative or collective works based on
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the Program.
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In addition, mere aggregation of another work not based on the Program with
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the Program (or with a work based on the Program) on a volume
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of a 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
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Sections 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
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and 2 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 physically
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performing source distribution, a complete machine-readable copy of the
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corresponding source code, to be distributed under the terms of
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Sections 1 and 2 above on a medium customarily used for software
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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 only
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for noncommercial distribution and only if you received the program in
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object code or executable form with such an offer, in accord with
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Subsection b above.)
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The source code for a work means the preferred form of the work for making
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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 associated
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interface definition files, plus the scripts used to control compilation and
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installation of the executable. However, as a special exception, the source
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code distributed need not include anything that is normally distributed
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(in either source or binary form) with the major components (compiler,
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kernel, and so on) of the operating system on which the executable runs,
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unless that component itself accompanies the executable.
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If distribution of executable or object code is made by offering access to
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copy from a designated place, then offering equivalent access to copy the
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source code from the same place counts as distribution of the source code,
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even though third parties are not compelled to copy the source along
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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
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copy, modify, sublicense or distribute the Program is void, and will
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automatically terminate your rights under this License. However, parties who
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have received copies, or rights, from you under this License will not have
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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 if
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you do not accept this License. Therefore, by modifying or distributing
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the Program (or any work based on the Program), you indicate your acceptance
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of this License to do so, and all its terms and conditions for
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copying, distributing or modifying the Program or works 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 original
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licensor to copy, distribute or modify the Program subject to these terms
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and conditions. You may not impose any further restrictions on the
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recipients' exercise of the rights granted herein. You are not responsible
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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
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are imposed on you (whether by court order, agreement or otherwise) that
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contradict the conditions of this License, they do not excuse you from
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the conditions of this License. If you cannot distribute so as to satisfy
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simultaneously your obligations under this License and any other pertinent
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obligations, then as a consequence you may not distribute the Program at
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all. For example, if a patent license would not permit royalty-free
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redistribution of the Program by all those who receive copies directly or
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indirectly through you, then the only way you could satisfy both it and
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this License would be to refrain entirely from 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 patents
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or other property right claims or to contest validity of any such claims;
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this section has the sole purpose of protecting the integrity of the free
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software distribution system, which is implemented by public license
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practices. Many people have made generous contributions to the wide range of
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software distributed through that system in reliance on consistent
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application of that system; it is up to the author/donor to decide if he or
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she is willing to distribute software through any other system and a
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licensee cannot impose that choice.
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This section is intended to make thoroughly clear what is believed to be a
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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, so
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that distribution is permitted only in or among countries not thus excluded.
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In such case, this License incorporates the limitation as if written in
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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
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will be similar in spirit to the present version, but may differ in detail
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to 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
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ask for permission. For software which is copyrighted by the Free Software
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Foundation, write to the Free Software Foundation; we sometimes
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make 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 of
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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
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EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING
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THE COPYRIGHT HOLDERS
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AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY
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KIND, EITHER EXPRESSED OR
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IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
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PROGRAM IS WITH YOU.
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SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY
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SERVICING, REPAIR OR
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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,
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OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS
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PERMITTED ABOVE, BE LIABLE
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TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
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CONSEQUENTIAL DAMAGES ARISING
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OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO
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LOSS OF DATA OR DATA
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BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
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FAILURE OF THE PROGRAM
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TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS
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BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGES.
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END OF TERMS AND CONDITIONS |