% license-texts.tex                                                  -*- LaTeX -*-

%      Tutorial Text for the Detailed Study and Analysis of GPL and LGPL course

%

% Copyright (C) 1989, 1991, 1999, 2002 Free Software Foundation, Inc.

\part{Full Texts of the GNU GPL and Related Licenses}

family of licenses.

\chapter{The GNU General Public License, version 2}

\begin{center}

{\parindent 0in

Version 2, June 1991

Copyright \copyright\ 1989, 1991 Free Software Foundation, Inc.

\bigskip

59 Temple Place - Suite 330, Boston, MA  02111-1307, USA

\bigskip

Everyone is permitted to copy and distribute verbatim copies

of this license document, but changing it is not allowed.

}

\end{center}

\begin{center}

{\bf\large Preamble}

\end{center}

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.

\begin{center}

{\Large \sc Terms and Conditions For Copying, Distribution and

  Modification}

\end{center}

\begin{enumerate}

\addtocounter{enumi}{-1}

\item

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.

\item 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.

\item

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:

\begin{enumerate}

\item

You must cause the modified files to carry prominent notices stating that

you changed the files and the date of any change.

\item

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.

\item

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.)

\end{enumerate}

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.

\item

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:

\begin{enumerate}

\item

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,

\item

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,

\item