COPYING
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r8 | GNU GENERAL PUBLIC LICENSE | ||
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r19 | Version 2, June 1991 | ||
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r8 | |||
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r19 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., | ||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||||
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r8 | Everyone is permitted to copy and distribute verbatim copies | ||
of this license document, but changing it is not allowed. | ||||
Preamble | ||||
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r19 | The licenses for most software are designed to take away your | ||
freedom to share and change it. By contrast, the GNU General Public | ||||
License is intended to guarantee your freedom to share and change free | ||||
software--to make sure the software is free for all its users. This | ||||
General Public License applies to most of the Free Software | ||||
Foundation's software and to any other program whose authors commit to | ||||
using it. (Some other Free Software Foundation software is covered by | ||||
the GNU Lesser General Public License instead.) You can apply it to | ||||
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r8 | your programs, too. | ||
When we speak of free software, we are referring to freedom, not | ||||
price. Our General Public Licenses are designed to make sure that you | ||||
have the freedom to distribute copies of free software (and charge for | ||||
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r19 | this service if you wish), that you receive source code or can get it | ||
if you want it, that you can change the software or use pieces of it | ||||
in new free programs; and that you know you can do these things. | ||||
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r8 | |||
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r19 | To protect your rights, we need to make restrictions that forbid | ||
anyone to deny you these rights or to ask you to surrender the rights. | ||||
These restrictions translate to certain responsibilities for you if you | ||||
distribute copies of the software, or if you modify it. | ||||
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For example, if you distribute copies of such a program, whether | ||||
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r19 | gratis or for a fee, you must give the recipients all the rights that | ||
you have. You must make sure that they, too, receive or can get the | ||||
source code. And you must show them these terms so they know their | ||||
rights. | ||||
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r8 | |||
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r19 | We protect your rights with two steps: (1) copyright the software, and | ||
(2) offer you this license which gives you legal permission to copy, | ||||
distribute and/or modify the software. | ||||
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r8 | |||
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r19 | Also, for each author's protection and ours, we want to make certain | ||
that everyone understands that there is no warranty for this free | ||||
software. If the software is modified by someone else and passed on, we | ||||
want its recipients to know that what they have is not the original, so | ||||
that any problems introduced by others will not reflect on the original | ||||
authors' reputations. | ||||
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r8 | |||
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r19 | Finally, any free program is threatened constantly by software | ||
patents. We wish to avoid the danger that redistributors of a free | ||||
program will individually obtain patent licenses, in effect making the | ||||
program proprietary. To prevent this, we have made it clear that any | ||||
patent must be licensed for everyone's free use or not licensed at all. | ||||
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r8 | |||
The precise terms and conditions for copying, distribution and | ||||
modification follow. | ||||
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r19 | GNU GENERAL PUBLIC LICENSE | ||
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | ||||
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r8 | |||
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r19 | 0. This License applies to any program or other work which contains | ||
a notice placed by the copyright holder saying it may be distributed | ||||
under the terms of this 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 to say, a work containing the Program or a portion of it, | ||||
either verbatim or with modifications and/or translated into another | ||||
language. (Hereinafter, translation is included without limitation in | ||||
the term "modification".) Each licensee is addressed as "you". | ||||
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r19 | Activities other than copying, distribution and modification are not | ||
covered by this License; they are outside its scope. The act of | ||||
running the Program is not restricted, and the output from the Program | ||||
is covered only if its contents constitute a work based on the | ||||
Program (independent of having been made by running the Program). | ||||
Whether that is true depends on what the Program does. | ||||
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r19 | 1. You may copy and distribute verbatim copies of the Program's | ||
source code as you receive it, in any medium, provided that you | ||||
conspicuously and appropriately publish on each copy an appropriate | ||||
copyright notice and disclaimer of warranty; keep intact all the | ||||
notices that refer to this License and to the absence of any warranty; | ||||
and give any other recipients of the Program a copy of this License | ||||
along with the Program. | ||||
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r19 | You may charge a fee for the physical act of transferring a copy, and | ||
you may at your option offer warranty protection in exchange for a fee. | ||||
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r19 | 2. You may modify your copy or copies of the Program or any portion | ||
of it, thus forming a work based on the Program, and copy and | ||||
distribute such modifications or work under the terms of Section 1 | ||||
above, provided that you also meet all of these conditions: | ||||
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r19 | a) You must cause the modified files to carry prominent notices | ||
stating that you changed the files and the date of any change. | ||||
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r8 | |||
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r19 | b) You must cause any work that you distribute or publish, that in | ||
whole or in part contains or is derived from the Program or any | ||||
part thereof, to be licensed as a whole at no charge to all third | ||||
parties under the terms of this License. | ||||
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r19 | c) If the modified program normally reads commands interactively | ||
when run, you must cause it, when started running for such | ||||
interactive use in the most ordinary way, to print or display an | ||||
announcement including an appropriate copyright notice and a | ||||
notice that there is no warranty (or else, saying that you provide | ||||
a warranty) and that users may redistribute the program under | ||||
these conditions, and telling the user how to view a copy of this | ||||
License. (Exception: if the Program itself is interactive but | ||||
does not normally print such an announcement, your work based on | ||||
the Program is not required to print an announcement.) | ||||
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r19 | These requirements apply to the modified work as a whole. If | ||
identifiable sections of that work are not derived from the Program, | ||||
and can be reasonably considered independent and separate works in | ||||
themselves, then this License, and its terms, do not apply to those | ||||
sections when you distribute them as separate works. But when you | ||||
distribute the same sections as part of a whole which is a work based | ||||
on the Program, the distribution of the whole must be on the terms of | ||||
this License, whose permissions for other licensees extend to the | ||||
entire whole, and thus to each and every part regardless of who wrote it. | ||||
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r19 | Thus, it is not the intent of this section to claim rights or contest | ||
your rights to work written entirely by you; rather, the intent is to | ||||
exercise the right to control the distribution of derivative or | ||||
collective works based on the Program. | ||||
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r19 | In addition, mere aggregation of another work not based on the Program | ||
with the Program (or with a work based on the Program) on a volume of | ||||
a storage or distribution medium does not bring the other work under | ||||
the scope of this License. | ||||
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r19 | 3. You may copy and distribute the Program (or a work based on it, | ||
under Section 2) in object code or executable form under the terms of | ||||
Sections 1 and 2 above provided that you also do one of the following: | ||||
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r8 | |||
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r19 | a) Accompany it with the complete corresponding machine-readable | ||
source code, which must be distributed under the terms of Sections | ||||
1 and 2 above on a medium customarily used for software interchange; or, | ||||
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r19 | b) Accompany it with a written offer, valid for at least three | ||
years, to give any third party, for a charge no more than your | ||||
cost of physically performing source distribution, a complete | ||||
machine-readable copy of the corresponding source code, to be | ||||
distributed under the terms of Sections 1 and 2 above on a medium | ||||
customarily used for software interchange; or, | ||||
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r19 | c) Accompany it with the information you received as to the offer | ||
to distribute corresponding source code. (This alternative is | ||||
allowed only for noncommercial distribution and only if you | ||||
received the program in object code or executable form with such | ||||
an offer, in accord with Subsection b above.) | ||||
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r19 | The source code for a work means the preferred form of the work for | ||
making modifications to it. For an executable work, complete source | ||||
code means all the source code for all modules it contains, plus any | ||||
associated interface definition files, plus the scripts used to | ||||
control compilation and installation of the executable. However, as a | ||||
special exception, the source code distributed need not include | ||||
anything that is normally distributed (in either source or binary | ||||
form) with the major components (compiler, kernel, and so on) of the | ||||
operating system on which the executable runs, unless that component | ||||
itself accompanies the executable. | ||||
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r19 | If distribution of executable or object code is made by offering | ||
access to copy from a designated place, then offering equivalent | ||||
access to copy the source code from the same place counts as | ||||
distribution of the source code, even though third parties are not | ||||
compelled to copy the source along with the object code. | ||||
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r19 | 4. You may not copy, modify, sublicense, or distribute the Program | ||
except as expressly provided under this License. Any attempt | ||||
otherwise to copy, modify, sublicense or distribute the Program is | ||||
void, and will automatically terminate your rights under this License. | ||||
However, parties who have received copies, or rights, from you under | ||||
this License will not have their licenses terminated so long as such | ||||
parties remain in full compliance. | ||||
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r19 | 5. You are not required to accept this License, since you have not | ||
signed it. However, nothing else grants you permission to modify or | ||||
distribute the Program or its derivative works. These actions are | ||||
prohibited by law if you do not accept this License. Therefore, by | ||||
modifying or distributing the Program (or any work based on the | ||||
Program), you indicate your acceptance of this License to do so, and | ||||
all its terms and conditions for copying, distributing or modifying | ||||
the Program or works based on it. | ||||
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r19 | 6. Each time you redistribute the Program (or any work based on the | ||
Program), the recipient automatically receives a license from the | ||||
original licensor to copy, distribute or modify the Program subject to | ||||
these terms and conditions. You may not impose any further | ||||
restrictions on the recipients' exercise of the rights granted herein. | ||||
You are not responsible for enforcing compliance by third parties to | ||||
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r8 | this License. | ||
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r19 | 7. If, as a consequence of a court judgment or allegation of patent | ||
infringement or for any other reason (not limited to patent issues), | ||||
conditions are imposed on you (whether by court order, agreement or | ||||
otherwise) that contradict the conditions of this License, they do not | ||||
excuse you from the conditions of this License. If you cannot | ||||
distribute so as to satisfy simultaneously your obligations under this | ||||
License and any other pertinent obligations, then as a consequence you | ||||
may not distribute the Program at all. For example, if a patent | ||||
license would not permit royalty-free redistribution of the Program by | ||||
all those who receive copies directly or indirectly through you, then | ||||
the only way you could satisfy both it and this License would be to | ||||
refrain entirely from distribution of the Program. | ||||
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r19 | If any portion of this section is held invalid or unenforceable under | ||
any particular circumstance, the balance of the section is intended to | ||||
apply and the section as a whole is intended to apply in other | ||||
circumstances. | ||||
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r19 | It is not the purpose of this section to induce you to infringe any | ||
patents or other property right claims or to contest validity of any | ||||
such claims; this section has the sole purpose of protecting the | ||||
integrity of the free software distribution system, which is | ||||
implemented by public license practices. Many people have made | ||||
generous contributions to the wide range of software distributed | ||||
through that system in reliance on consistent application of that | ||||
system; it is up to the author/donor to decide if he or she is willing | ||||
to distribute software through any other system and a licensee cannot | ||||
impose that choice. | ||||
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r19 | This section is intended to make thoroughly clear what is believed to | ||
be a consequence of the rest of this License. | ||||
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r19 | 8. If the distribution and/or use of the Program is restricted in | ||
certain countries either by patents or by copyrighted interfaces, the | ||||
original copyright holder who places the Program under this License | ||||
may add an explicit geographical distribution limitation excluding | ||||
those countries, so that distribution is permitted only in or among | ||||
countries not thus excluded. In such case, this License incorporates | ||||
the limitation as if written in the body of this License. | ||||
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r19 | 9. The Free Software Foundation may publish revised and/or new versions | ||
of the General Public License from time to time. Such new versions will | ||||
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r8 | be similar in spirit to the present version, but may differ in detail to | ||
address new problems or concerns. | ||||
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r19 | Each version is given a distinguishing version number. If the Program | ||
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 version or of any later version published by the Free | ||||
Software Foundation. If the Program does not specify a version number of | ||||
this License, you may choose any version ever published by the Free Software | ||||
Foundation. | ||||
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r19 | 10. If you wish to incorporate parts of the Program into other free | ||
programs whose distribution conditions are different, write to the author | ||||
to ask for permission. For software which is copyrighted by the Free | ||||
Software Foundation, write to the Free Software Foundation; we sometimes | ||||
make exceptions for this. Our decision will be guided by the two goals | ||||
of preserving the free status of all derivatives of our free software and | ||||
of promoting the sharing and reuse of software generally. | ||||
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r19 | NO WARRANTY | ||
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r19 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY | ||
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN | ||||
OTHERWISE STATED 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 LIMITED TO, THE IMPLIED WARRANTIES OF | ||||
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS | ||||
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE | ||||
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, | ||||
REPAIR OR CORRECTION. | ||||
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r19 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING | ||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR | ||||
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, | ||||
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING | ||||
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED | ||||
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY | ||||
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER | ||||
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE | ||||
POSSIBILITY OF SUCH DAMAGES. | ||||
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END OF TERMS AND CONDITIONS | ||||
How to Apply These Terms to Your New Programs | ||||
If you develop a new program, and you want it to be of the greatest | ||||
possible use to the public, the best way to achieve this is to make it | ||||
free software which everyone can redistribute and change under these terms. | ||||
To do so, attach the following notices to the program. It is safest | ||||
to attach them to the start of each source file to most effectively | ||||
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r19 | convey the exclusion of warranty; and each file should have at least | ||
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r8 | the "copyright" line and a pointer to where the full notice is found. | ||
<one line to give the program's name and a brief idea of what it does.> | ||||
Copyright (C) <year> <name of author> | ||||
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r19 | This program is free software; you can redistribute it and/or modify | ||
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r8 | it under the terms of the GNU General Public License as published by | ||
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r19 | the Free Software Foundation; either version 2 of the License, or | ||
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r8 | (at your option) any later version. | ||
This program is distributed in the hope that it will be useful, | ||||
but WITHOUT ANY WARRANTY; without even the implied warranty of | ||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||||
GNU General Public License for more details. | ||||
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r19 | You should have received a copy of the GNU General Public License along | ||
with this program; if not, write to the Free Software Foundation, Inc., | ||||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||||
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Also add information on how to contact you by electronic and paper mail. | ||||
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r19 | If the program is interactive, make it output a short notice like this | ||
when it starts in an interactive mode: | ||||
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r19 | Gnomovision version 69, Copyright (C) year name of author | ||
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | ||||
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r8 | This is free software, and you are welcome to redistribute it | ||
under certain conditions; type `show c' for details. | ||||
The hypothetical commands `show w' and `show c' should show the appropriate | ||||
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r19 | parts of the General Public License. Of course, the commands you use may | ||
be called something other than `show w' and `show c'; they could even be | ||||
mouse-clicks or menu items--whatever suits your program. | ||||
You should also get your employer (if you work as a programmer) or your | ||||
school, if any, to sign a "copyright disclaimer" for the program, if | ||||
necessary. Here is a sample; alter the names: | ||||
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r19 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program | ||
`Gnomovision' (which makes passes at compilers) written by James Hacker. | ||||
<signature of Ty Coon>, 1 April 1989 | ||||
Ty Coon, President of Vice | ||||
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r19 | This General Public License does not permit incorporating your program into | ||
proprietary programs. If your program is a subroutine library, you may | ||||
consider it more useful to permit linking proprietary applications with the | ||||
library. If this is what you want to do, use the GNU Lesser General | ||||
Public License instead of this License. | ||||