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
GNU GENERAL PUBLIC LICENSE
37