| gnu general public license version 2 june 1991 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 library 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 gnu general public license 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 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 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) <year> <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 2 of the license 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 51
franklin street fifth floor boston ma 02110-1301 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)
year 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
is a sample alter the names: 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 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 library general public license instead
of this license
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