112
US
We protect your rights with two steps:
(I)
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
O.
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 ifits contentsconstitute 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.
I. 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 workbased on the Program, and copy
and distribute such modifications
or
work under the terms
of
Section I 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: ifthe
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 moditied 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 I 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 I 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 I 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 liles, 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.
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