264 lines
15 KiB
Plaintext
264 lines
15 KiB
Plaintext
The GNU General Public License, Version 2, June 1991 (GPLv2)
|
|
============================================================
|
|
|
|
> Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
|
> 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
|
|
Everyone is permitted to copy and distribute verbatim copies of this license
|
|
document, but changing it is not allowed.
|
|
|
|
|
|
Preamble
|
|
--------
|
|
|
|
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
|
|
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 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.
|
|
|
|
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 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 show them
|
|
these terms so they know 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.
|
|
|
|
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.
|
|
|
|
The precise terms and conditions for copying, distribution and modification
|
|
follow.
|
|
|
|
|
|
Terms And Conditions For Copying, Distribution And Modification
|
|
---------------------------------------------------------------
|
|
|
|
**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".
|
|
|
|
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.
|
|
|
|
**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.
|
|
|
|
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.
|
|
|
|
**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:
|
|
|
|
* **a)** You must cause the modified files to carry prominent notices stating
|
|
that you changed the files and the date of any change.
|
|
|
|
* **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.
|
|
|
|
* **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.)
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
**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:
|
|
|
|
* **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,
|
|
|
|
* **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,
|
|
|
|
* **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.)
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
**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.
|
|
|
|
**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.
|
|
|
|
**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 this License.
|
|
|
|
**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.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
This section is intended to make thoroughly clear what is believed to be a
|
|
consequence of the rest of this License.
|
|
|
|
**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.
|
|
|
|
**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 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 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.
|
|
|
|
**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.
|
|
|
|
|
|
No Warranty
|
|
-----------
|
|
|
|
**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.
|
|
|
|
**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. |