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306 lines
18 KiB
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<HTML>
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<HEAD>
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<TITLE>GNU General Public License</TITLE>
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</HEAD><BODY>
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<B>The GNU General Public License
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<P></P>
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</B>Version 2, June 1991
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<P></P>
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Copyright © 1989, 1991 Free Software Foundation, Inc.
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<BR>59 Temple Place / Suite 330, Boston, MA 02111-1307, USA
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<P></P>
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Everyone is permitted to copy and distribute verbatim copies of this license
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document, but changing it is not allowed.
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<P></P>
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<B>Preamble
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<P></P>
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</B>The licenses for most software are designed to take away your freedom to share
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and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and
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change free software to 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 any other program whose authors commit to using it. (Some
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other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs,
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too.
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<P></P>
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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 to
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distribute copies of free software (and charge for this service if you wish),
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that you receive source code or can get it if you want it, that you can change the
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software or use pieces of it in new free programs; and that you know you can
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do these things.
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<P></P>
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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 restrictions
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translate to certain responsibilities for you if you distribute copies of the
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software, or if you modify it.
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<P></P>
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For example, if you distribute copies of such a program, whether gratis or for
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a fee, you must give the recipients all the rights that you have. You must
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make sure that they, too, receive or can get the source code. And you must show
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them these terms so they know their rights.
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<P></P>
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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 and/or
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modify the software.
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<P></P>
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Also, for each author's protection and ours, we want to make certain that everyone understands that
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there is no warranty for this free software. If the software is modified by
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someone else and passed on, we want its recipients to know that what they have is
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not the original, so that any problems introduced by others will not reflect on
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the original authors' reputations.
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<P></P>
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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 individually
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obtain patent licenses, in effect making the program proprietary. To prevent
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this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for
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copying, distribution and modification follow.
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<P></P>
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<B>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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<P></P>
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</B>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 terms of this
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General Public License. The `Program”, below, refers to any such program or work, and a `work based on the Program' means either the Program or any derivative work under copyright law: that is
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to say, a work containing the Program or a portion of it, either verbatim or
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with modifications and/or translated into another language. (Hereinafter,
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translation is included without limitation in the term `modification'.) Each licensee is addressed as `you'.
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<P></P>
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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 Program is
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not restricted, and the output from the Program is covered only if its contents
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constitute a work based on the Program (independent of having been made by
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running the Program). Whether that is true depends on what the Program does.
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<P></P>
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<OL><LI> You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you
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conspicuously 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 License
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and to the absence of any warranty; and give any other recipients of the Program
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a copy of this License along with the Program.
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<P></P>
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</OL>You may charge a fee for the physical act of transferring a copy, and you may
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at your option offer warranty protection in exchange for a fee.
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<P></P>
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<OL START="2"><LI> You may modify your copy or copies of the Program or any portion of it, thus
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forming a work based on the Program, and copy and distribute such modifications
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or work under the terms of Section 1 above, provided that you also meet all of
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these conditions:
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<P></P>
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</OL>a) You must cause the modified files to carry prominent notices stating that you
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changed the files and the date of any change.
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<P></P>
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b) You must cause any work that you distribute or publish, that in whole or in
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part contains or is derived from the Program or any part thereof, to be licensed
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as a whole at no charge to all third parties under the terms of this License.
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<P></P>
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c) If the modified program normally reads commands interactively when run, you
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must cause it, when started running for such interactive use in the most ordinary
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way, to print or display an announcement including an appropriate copyright
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notice and a notice that there is no warranty (or else, saying that you provide a
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warranty) and that users may redistribute the program under these conditions,
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and telling 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 announcement,
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your work based on the Program is not required to print an announcement.)
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<P></P>
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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 reasonably
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considered independent and separate works in themselves, then this License, and its
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terms, do not apply to those sections when you distribute them as separate
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works. But when you distribute the same sections as part of a whole which is a work
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based on the Program, the distribution of the whole must be on the terms of
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this License, whose permissions for other licensees extend to the entire whole,
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and thus to each and every part regardless of who wrote it.
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<P></P>
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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 the
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right to control the distribution of derivative or collective works based on the
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Program.
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<P></P>
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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 of a storage or
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distribution medium does not bring the other work under the scope of this License.
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<P></P>
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<OL START="3"><LI> You may copy and distribute the Program (or a work based on it, under Section
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2) in object code or executable form under the terms of Sections 1 and 2 above
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provided that you also do one of the following:
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<P></P>
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</OL>a) Accompany it with the complete corresponding machine-readable source code,
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which must be distributed under the terms of Sections 1 and 2 above on a medium
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customarily used for software interchange; or,
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<P></P>
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b) Accompany it with a written offer, valid for at least three years, to give any
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third party, for a charge no more than your cost of physically performing
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source distribution, a complete machine-readable copy of the corresponding source
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code, to be distributed under the terms of Sections 1 and 2 above on a medium
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customarily used for software interchange; or,
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<P></P>
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c) Accompany it with the information you received as to the offer to distribute
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corresponding source code. (This alternative is allowed only for noncommercial
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distribution and only if you received the program in object code or executable
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form with such an offer, in accord with Subsection b above.)
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<P></P>
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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 means all the
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source code for all modules it contains, plus any associated interface definition
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files, plus the scripts used to control compilation and installation of the
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executable. However, as a special exception, the source code distributed need not
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include anything that is normally distributed (in either source or binary
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form) with the major components (compiler, kernel, and so on) of the operating
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system on which the executable runs, unless that component itself accompanies the
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executable.
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<P></P>
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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 source
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code from the same place counts as distribution of the source code, even though
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third parties are not compelled to copy the source along with the object code.
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<P></P>
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<OL START="4"><LI> 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, modify,
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sublicense or distribute the Program is void, and will automatically terminate your
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rights under this License. However, parties who have received copies, or
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rights, from you under this License will not have their licenses terminated so long
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as such parties remain in full compliance.
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<P></P>
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<LI> You are not required to accept this License, since you have not signed it.
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However, nothing else grants you permission to modify or distribute the Program or
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its derivative works. These actions are prohibited by law if you do not accept
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this License. Therefore, by modifying or distributing the Program (or any work
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based on the Program), you indicate your acceptance of this License to do so,
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and all its terms and conditions for copying, distributing or modifying the
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Program or works based on it.
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<P></P>
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<LI> Each time you redistribute the Program (or any work based on the Program), the
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recipient automatically receives a license from the original licensor to copy,
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distribute or modify the Program subject to these terms and conditions. You
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may not impose any further restrictions on the recipients' exercise of the rights granted herein.
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<P></P>
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</OL>You are not responsible for enforcing compliance by third parties to this
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License.
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<P></P>
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<OL START="7"><LI> If, as a consequence of a court judgment or allegation of patent infringement
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or for any other reason (not limited to patent issues), conditions are imposed
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on you (whether by court order, agreement or otherwise) that contradict the
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conditions of this License, they do not excuse you from the conditions of this
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License. If you cannot distribute so as to satisfy simultaneously your obligations
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under this License and any other pertinent obligations, then as a consequence
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you may not distribute the Program at all. For example, if a patent license
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would 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 could
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satisfy both it and this License would be to refrain entirely from distribution of
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the Program.
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<P></P>
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</OL>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 and the
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section as a whole is intended to apply in other circumstances.
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<P></P>
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It is not the purpose of this section to induce you to infringe any patents or
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other property right claims or to contest validity of any such claims; this
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section has the sole purpose of protecting the integrity of the free software
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distribution system, which is implemented by public license practices. Many people
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have made generous contributions to the wide range of software distributed
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through that system in reliance on consistent application of that system; it is up
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to the author/donor to decide if he or she is willing to distribute software
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through any other system and a licensee cannot impose that choice.
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<P></P>
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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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<P></P>
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<OL START="8"><LI> 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 copyright
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holder who places the Program under this License may add an explicit geographical
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distribution limitation excluding those countries, so that distribution is
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permitted only in or among countries not thus excluded. In such case, this License
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incorporates the limitation as if written in the body of this License.
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<P></P>
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<LI> The Free Software Foundation may publish revised and/or new versions of the
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General Public License from time to time. Such new versions will be similar in
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spirit to the present version, but may differ in detail to address new problems
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or concerns.
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<P></P>
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</OL>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 later version', you have the option of following the terms and conditions either of that
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version or of any later version published by the Free Software Foundation. If the
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Program does not specify a version number of this License, you may choose any
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version ever published by the Free Software Foundation.
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<P></P>
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<OL><LI> If you wish to incorporate parts of the Program into other free programs whose
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distribution conditions are different, write to the author to ask for
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permission. For software which is copyrighted by the Free Software Foundation, write to
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the Free Software Foundation; we sometimes make exceptions for this. Our
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decision will be guided by the two goals of preserving the free status of all
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derivatives of our free software and of promoting the sharing and reuse of software
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generally.
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<P></P>
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</OL>NO WARRANTY
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<P></P>
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<OL><LI> BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE
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PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED
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IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM `AS IS' WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
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IS WITH 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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<P></P>
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<LI> IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY
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COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE
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PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL,
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SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR
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INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
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RENDERED 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 OTHER
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PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
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<P></P>
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</OL>END OF TERMS AND CONDITIONS
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<P></P>
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<B>How to Apply These Terms to Your New Programs
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<P></P>
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</B>If you develop a new program, and you want it to be of the greatest possible
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use to the public, the best way to achieve this is to make it free software
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which everyone can redistribute and change under these terms.
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<P></P>
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To do so, attach the following notices to the program. It is safest to attach
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them to the start of each source file to most effectively convey the exclusion
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of warranty; and each file should have at least the `copyright' line and a pointer to where the full notice is found.
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<P></P>
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<I>one line for the program's name and a brief idea of what it does.
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<BR></I>Copyright (C) 19<I>yy</I> <I>name of author</I>
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<BR>
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<BR>This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any later
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version.
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<BR>
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<BR>This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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<BR>
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<BR>You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place - Suite 330, Boston, MA 02111-1307, USA.
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<P></P>
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Also add information on how to contact you by electronic and paper mail.
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<P></P>
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If the program is interactive, make it output a short notice like the
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following example when it starts in an interactive mode:
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<P></P>
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Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes
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with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain
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conditions; type `show c' for details.
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<P></P>
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The hypothetical commands <B>show w</B> and <B>show c</B> should show the appropriate parts of the General Public License. Of course,
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the commands you use may be called something other than show w and show c; they can be mouse clicks or menu items—whatever suits your program.
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<P></P>
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You should also get your employer (if you work as a programmer) or your
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school, if any, to sign a `copyright disclaimer' for the program, if necessary. The following is a sample (when copying, alter
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the names).
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<P></P>
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker.
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<BR>
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<BR>signature of Ty Coon, 1 April 1989
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<BR>Ty Coon, President of Vice
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<P></P>
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This General Public License does not permit incorporating your program into
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proprietary programs. If your program is a subroutine library, you may consider
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it more useful to permit linking proprietary applications with the library. If
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this is what you want to do, use the GNU Library General Public License instead of this License.
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<P></P>
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</BODY>
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</HTML>
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