LICENSE.txt   [plain text]


                Common UNIX Printing System License Agreement

                Copyright 1997-2003 by Easy Software Products
                        44141 AIRPORT VIEW DR STE 204
                     HOLLYWOOD, MARYLAND 20636-3111 USA

                           Voice: +1.301.373.9600
                          Email: cups-info@cups.org
                          WWW: http://www.cups.org


INTRODUCTION

The Common UNIX Printing System(tm), ("CUPS(tm)"), is provided
under the GNU General Public License ("GPL") and GNU Library
General Public License ("LGPL"), Version 2, with exceptions for
Apple operating systems and the OpenSSL toolkit. A copy of the
exceptions and licenses follow this introduction.

The GNU LGPL applies to the CUPS API library, located in the
"cups" subdirectory of the CUPS source distribution and in the
"cups" include directory and library files in the binary
distributions. The GNU GPL applies to the remainder of the CUPS
distribution, including the "pdftops" filter which is based upon
Xpdf and the CUPS imaging library.

For those not familiar with the GNU GPL, the license basically
allows you to:

   - Use the CUPS software at no charge.
   - Distribute verbatim copies of the software in source or
     binary form.
   - Sell verbatim copies of the software for a media fee, or
     sell support for the software.
   - Distribute or sell printer drivers and filters that use
     CUPS so long as source code is made available under the
     GPL.

What this license *does not* allow you to do is make changes or
add features to CUPS and then sell a binary distribution without
source code. You must provide source for any new drivers,
changes, or additions to the software, and all code must be
provided under the GPL or LGPL as appropriate. The only
exceptions to this are the portions of the CUPS software covered
by the Apple operating system license exceptions outlined later
in this license agreement.

The GNU LGPL relaxes the "link-to" restriction, allowing you to
develop applications that use the CUPS API library under other
licenses and/or conditions as appropriate for your application.


LICENSE EXCEPTIONS

In addition, as the copyright holder of CUPS, Easy Software
Products grants the following special exceptions:

     1. Apple Operating System Development License Exception;

	a. Software that is developed by any person or entity
	   for an Apple Operating System ("Apple OS-Developed
	   Software"), including but not limited to Apple and
	   third party printer drivers, filters, and backends
	   for an Apple Operating System, that is linked to the
	   CUPS imaging library or based on any sample filters
	   or backends provided with CUPS shall not be
	   considered to be a derivative work or collective work
	   based on the CUPS program and is exempt from the
	   mandatory source code release clauses of the GNU GPL.
	   You may therefore distribute linked combinations of
	   the CUPS imaging library with Apple OS-Developed
	   Software without releasing the source code of the
	   Apple OS-Developed Software. You may also use sample
	   filters and backends provided with CUPS to develop
	   Apple OS-Developed Software without releasing the
	   source code of the Apple OS-Developed Software.

	b. An Apple Operating System means any operating system
	   software developed and/or marketed by Apple Computer,
	   Inc., including but not limited to all existing
	   releases and versions of Apple's Darwin, Mac OS X,
	   and Mac OS X Server products and all follow-on
	   releases and future versions thereof.

	c. This exception is only available for Apple
	   OS-Developed Software and does not apply to software
	   that is distributed for use on other operating
	   systems.

	d. All CUPS software that falls under this license
	   exception have the following text at the top of each
	   source file:

	     This file is subject to the Apple OS-Developed
	     Software exception.

     2. OpenSSL Toolkit License Exception;

	a. Easy Software Products explicitly allows the
	   compilation and distribution of the CUPS software
	   with the OpenSSL Toolkit.

No developer is required to provide these exceptions in a
derived work.


TRADEMARKS

Easy Software Products has trademarked the Common UNIX Printing
System, CUPS, and CUPS logo. These names and logos may be used
freely in any direct port or binary distribution of CUPS. Please
contract Easy Software Products for written permission to use
them in derivative products. Our intention is to protect the
value of these trademarks and ensure that any derivative product
meets the same high-quality standards as the original.


BINARY DISTRIBUTION RIGHTS

Easy Software Products also sells rights to the CUPS source code
under a binary distribution license for vendors that are unable
to release source code for their drivers, additions, and
modifications to CUPS under the GNU GPL and LGPL. For
information please contact us at the address shown above.

The Common UNIX Printing System provides a "pdftops" filter that
is based on the Xpdf software. For binary distribution licensing
of this software, please contact:

     Derek B. Noonburg
     Email: derekn@foolabs.com
     WWW: http://www.foolabs.com/xpdf/


SUPPORT

Easy Software Products sells software support for CUPS as well
as a commercial printing product based on CUPS called ESP Print
Pro. You can find out more at our web site:

     http://www.easysw.com/

		    GNU GENERAL PUBLIC LICENSE
		       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
                       59 Temple Place, Suite 330, Boston, MA  02111-1307  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
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  Finally, any free program is threatened constantly by software
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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
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  1. You may copy and distribute verbatim copies of the Program's
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You may charge a fee for the physical act of transferring a copy, and
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These requirements apply to the modified work as a whole.  If
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			    NO WARRANTY

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		     END OF TERMS AND CONDITIONS

		  GNU LIBRARY GENERAL PUBLIC LICENSE
			 Version 2, June 1991

	  Copyright (C) 1991 Free Software Foundation, Inc.
       59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

     Everyone is permitted to copy and distribute verbatim copies
      of this license document, but changing it is not allowed.

    [This is the first released version of the library GPL.  It is
   numbered 2 because it goes with version 2 of the ordinary GPL.]

			       Preamble

  The licenses for most software are designed to take away your
freedom to share and change it.  By contrast, the GNU General Public
Licenses are intended to guarantee your freedom to share and change
free software--to make sure the software is free for all its users.

  This license, the Library General Public License, applies to some
specially designated Free Software Foundation software, and to any
other libraries whose authors decide to use it.  You can use it for
your libraries, 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 library, or if you modify it.

  For example, if you distribute copies of the library, whether gratis
or for a fee, you must give the recipients all the rights that we gave
you.  You must make sure that they, too, receive or can get the source
code.  If you link a program with the library, you must provide
complete object files to the recipients so that they can relink them
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it.  And you must show them these terms so they know their rights.

  Our method of protecting your rights has two steps: (1) copyright
the library, and (2) offer you this license which gives you legal
permission to copy, distribute and/or modify the library.

  Also, for each distributor's protection, we want to make certain
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library.  If the library is modified by someone else and passed on, we
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version, so that any problems introduced by others will not reflect on
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   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

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