GNU GENERAL PUBLIC LICENSE | |
Version 1, February 1989 | |
Copyright (C) 1989 Free Software Foundation, Inc. | |
675 Mass Ave, Cambridge, MA 02139, USA | |
Everyone is permitted to copy and distribute verbatim copies | |
of this license document, but changing it is not allowed. | |
Preamble | |
The license agreements of most software companies try to keep users | |
at the mercy of those companies. By contrast, our 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. The | |
General Public License applies to the Free Software Foundation's | |
software and to any other program whose authors commit to using it. | |
You can use it for your programs, too. | |
When we speak of free software, we are referring to freedom, not | |
price. Specifically, the General Public License is designed to make | |
sure that you have the freedom to give away or sell copies of free | |
software, 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. | |
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. | |
For example, if you distribute copies of a such a program, whether | |
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 tell them their rights. | |
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. | |
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. | |
The precise terms and conditions for copying, distribution and | |
modification follow. | |
GNU GENERAL PUBLIC LICENSE | |
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
0. This License Agreement 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 work containing the | |
Program or a portion of it, either verbatim or with modifications. Each | |
licensee is addressed as "you". | |
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 | |
General Public License and to the absence of any warranty; and give any | |
other recipients of the Program a copy of this General Public License | |
along with the Program. You may charge a fee for the physical act of | |
transferring a copy. | |
2. You may modify your copy or copies of the Program or any portion of | |
it, and copy and distribute such modifications under the terms of Paragraph | |
1 above, provided that you also do the following: | |
a) cause the modified files to carry prominent notices stating that | |
you changed the files and the date of any change; and | |
b) cause the whole of any work that you distribute or publish, that | |
in whole or in part contains the Program or any part thereof, either | |
with or without modifications, to be licensed at no charge to all | |
third parties under the terms of this General Public License (except | |
that you may choose to grant warranty protection to some or all | |
third parties, at your option). | |
c) If the modified program normally reads commands interactively when | |
run, you must cause it, when started running for such interactive use | |
in the simplest and most usual 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 General | |
Public License. | |
d) 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. | |
Mere aggregation of another independent work with the Program (or its | |
derivative) on a volume of a storage or distribution medium does not bring | |
the other work under the scope of these terms. | |
3. You may copy and distribute the Program (or a portion or derivative of | |
it, under Paragraph 2) in object code or executable form under the terms of | |
Paragraphs 1 and 2 above provided that you also do one of the following: | |
a) accompany it with the complete corresponding machine-readable | |
source code, which must be distributed under the terms of | |
Paragraphs 1 and 2 above; or, | |
b) accompany it with a written offer, valid for at least three | |
years, to give any third party free (except for a nominal charge | |
for the cost of distribution) a complete machine-readable copy of the | |
corresponding source code, to be distributed under the terms of | |
Paragraphs 1 and 2 above; or, | |
c) accompany it with the information you received as to where the | |
corresponding source code may be obtained. (This alternative is | |
allowed only for noncommercial distribution and only if you | |
received the program in object code or executable form alone.) | |
Source code for a work means the preferred form of the work for making | |
modifications to it. For an executable file, complete source code means | |
all the source code for all modules it contains; but, as a special | |
exception, it need not include source code for modules which are standard | |
libraries that accompany the operating system on which the executable | |
file runs, or for standard header files or definitions files that | |
accompany that operating system. | |
4. You may not copy, modify, sublicense, distribute or transfer the | |
Program except as expressly provided under this General Public License. | |
Any attempt otherwise to copy, modify, sublicense, distribute or transfer | |
the Program is void, and will automatically terminate your rights to use | |
the Program under this License. However, parties who have received | |
copies, or rights to use copies, from you under this General Public | |
License will not have their licenses terminated so long as such parties | |
remain in full compliance. | |
5. By copying, distributing or modifying 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. | |
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. | |
7. The Free Software Foundation may publish revised and/or new versions | |
of the General Public License from time to time. Such new versions will | |
be similar in spirit to the present version, but may differ in detail to | |
address new problems or concerns. | |
Each version is given a distinguishing version number. If the Program | |
specifies a version number of the 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 | |
the license, you may choose any version ever published by the Free Software | |
Foundation. | |
8. 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. | |
NO WARRANTY | |
9. 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. | |
10. 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. | |
END OF TERMS AND CONDITIONS | |
Appendix: 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 humanity, 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 convey | |
the exclusion of warranty; and each file should have at least 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) 19yy <name of author> | |
This program is free software; you can redistribute it and/or modify | |
it under the terms of the GNU General Public License as published by | |
the Free Software Foundation; either version 1, or (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. | |
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., 675 Mass Ave, Cambridge, MA 02139, USA. | |
Also add information on how to contact you by electronic and paper mail. | |
If the program is interactive, make it output a short notice like this | |
when it starts in an interactive mode: | |
Gnomovision version 69, Copyright (C) 19xx name of author | |
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. | |
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 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 a sample; alter the names: | |
Yoyodyne, Inc., hereby disclaims all copyright interest in the | |
program `Gnomovision' (a program to direct compilers to make passes | |
at assemblers) written by James Hacker. | |
<signature of Ty Coon>, 1 April 1989 | |
Ty Coon, President of Vice | |
That's all there is to it! | |