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Appendix
You may charge a fee for the physical act of trans-
ferring a copy, and you may, at your discretion,
offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Pro-
gram 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 running is commenced 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 condi-
tions, 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 announce-
ment.)
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 reason-
ably 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 distri-
bution of derivative or collective works based on
the Program.
110
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 stor-
age 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 corre-
sponding machine-readable source code,
which must be distributed under the terms of
Sections 1 and 2 above on a medium custom-
arily 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 cus-
tomarily used for software interchange; or,
c) Accompany it with the information you
received as to the offer to distribute corre-
sponding 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 con-
tains, plus any associated interface definition files,
plus the scripts used to control compilation and
installation of the executable. However, as a spe-
cial 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 desig-
nated 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.
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