2 <!-- SECTION: Getting Started -->
4 <TITLE>Software License Agreement
</TITLE>
8 <P ALIGN=
"CENTER">Copyright
2007 by Apple Inc.
<BR>
10 Cupertino, CA
95014 USA
<BR>
12 WWW:
<A HREF=
"http://www.cups.org/">http://www.cups.org/
</A>
14 <H2 CLASS=
"title"><A NAME=
"INTRO">Introduction
</A></H2>
16 <P>The Common UNIX Printing System
<SUP>TM
</SUP>,
17 (
"CUPS<SUP>TM</SUP>"), is provided under the GNU General Public
18 License (
"GPL") and GNU Library General Public License (
"LGPL"),
19 Version
2, with exceptions for Apple operating systems and the
20 OpenSSL toolkit. A copy of the exceptions and licenses follow
21 this introduction.
</P>
23 <P>The GNU LGPL applies to the CUPS and CUPS Imaging libraries
24 located in the
"cups" and
"filter" subdirectories of the CUPS
25 source distribution and in the
"cups" include directory and
26 library files in the binary distributions. The GNU GPL applies to
27 the remainder of the CUPS distribution, including the
"pdftops"
28 filter which is based upon Xpdf.
</P>
30 <P>For those not familiar with the GNU GPL, the license basically
35 <LI>Use the CUPS software at no charge.
</LI>
37 <LI>Distribute verbatim copies of the software in source
40 <LI>Sell verbatim copies of the software for a media
41 fee, or sell support for the software.
</LI>
45 <P>What this license
<EM>does not
</EM> allow you to do is make
46 changes or add features to CUPS and then sell a binary
47 distribution without source code. You must provide source for any
48 changes or additions to the software, and all code must be
49 provided under the GPL or LGPL as appropriate. The only
50 exceptions to this are the portions of the CUPS software covered
51 by the Apple operating system license exceptions outlined later
52 in this license agreement.
</P>
54 <P>The GNU LGPL relaxes the
"link-to" restriction, allowing you
55 to develop applications that use the CUPS and CUPS Imaging
56 libraries under other licenses and/or conditions as appropriate
57 for your application, driver, or filter.
</P>
60 <H2 CLASS=
"title"><A NAME=
"EXCEPTIONS">License Exceptions
</A></H2>
62 <P>In addition, as the copyright holder of CUPS, Apple Inc. grants
63 the following special exceptions:
</P>
67 <LI><B>Apple Operating System Development License
72 <LI>Software that is developed by any person or
73 entity for an Apple Operating System (
"Apple
74 OS-Developed Software"), including but not
75 limited to Apple and third party printer
76 drivers, filters, and backends for an Apple
77 Operating System, that is linked to the CUPS
78 imaging library or based on any sample filters
79 or backends provided with CUPS shall not be
80 considered to be a derivative work or collective
81 work based on the CUPS program and is exempt
82 from the mandatory source code release clauses
83 of the GNU GPL. You may therefore distribute
84 linked combinations of the CUPS imaging library
85 with Apple OS-Developed Software without
86 releasing the source code of the Apple
87 OS-Developed Software. You may also use sample
88 filters and backends provided with CUPS to
89 develop Apple OS-Developed Software without
90 releasing the source code of the Apple
91 OS-Developed Software.
</LI>
93 <LI>An Apple Operating System means any
94 operating system software developed and/or
95 marketed by Apple Computer, Inc., including but
96 not limited to all existing releases and
97 versions of Apple's Darwin, Mac OS X, and Mac OS
98 X Server products and all follow-on releases and
99 future versions thereof.
</LI>
101 <LI>This exception is only available for Apple
102 OS-Developed Software and does not apply to
103 software that is distributed for use on other
104 operating systems.
</LI>
106 <LI>All CUPS software that falls under this
107 license exception have the following text at the
108 top of each source file:
110 <BLOCKQUOTE>This file is subject to the Apple
111 OS-Developed Software
112 exception.
</BLOCKQUOTE></LI>
116 <LI><B>OpenSSL Toolkit License Exception
</B>;
120 <LI>Apple Inc. explicitly allows the
121 compilation and distribution of the CUPS
122 software with the OpenSSL Toolkit.
</LI>
128 <P>No developer is required to provide these exceptions in a
132 <H2 CLASS=
"title"><A NAME=
"KERBEROS">Kerberos Support Code
</A></H2>
134 <P>The Kerberos support code (
"KSC") is copyright
2006 by Jelmer
135 Vernooij and is provided 'as-is', without any express or implied
136 warranty. In no event will the author or Apple Inc. be held liable
137 for any damages arising from the use of the KSC.
</P>
139 <P>Sources files containing KSC have the following text at the top
140 of each source file:
</P>
142 <BLOCKQUOTE>This file contains Kerberos support code, copyright
143 2006 by Jelmer Vernooij.
</BLOCKQUOTE>
145 <P>The KSC copyright and license apply
<EM>only
</EM> to
146 Kerberos-related feature code in CUPS. Such code is typically
147 conditionally compiled based on the present of the
148 <TT>HAVE_GSSAPI
</TT> preprocessor definition.
</P>
150 <P>Permission is granted to anyone to use the KSC for any
151 purpose, including commercial applications, and to alter it and
152 redistribute it freely, subject to the following
157 <LI>The origin of the KSC must not be misrepresented; you
158 must not claim that you wrote the original software. If
159 you use the KSC in a product, an acknowledgment in the
160 product documentation would be appreciated but is not
163 <LI>Altered source versions must be plainly marked as
164 such, and must not be misrepresented as being the
165 original software.
</LI>
167 <LI>This notice may not be removed or altered from any
168 source distribution.
</LI>
173 <H2 CLASS=
"title"><A NAME=
"TRADEMARKS">Trademarks
</A></H2>
175 <P>Apple Inc. has trademarked the Common UNIX
176 Printing System, CUPS, and CUPS logo. You may use these names and
177 logos in any direct port or binary distribution of CUPS. Please
178 contact Apple Inc. for written permission to use them
179 in derivative products. Our intention is to protect the value of
180 these trademarks and ensure that any derivative product meets the
181 same high-quality standards as the original.
</P>
183 <H2 CLASS=
"title"><A NAME=
"GPL">GNU GENERAL PUBLIC LICENSE
</A></H2>
185 <P>Version
2, June
1991
188 Copyright
1989,
1991 Free Software Foundation, Inc.
189 59 Temple Place, Suite
330, Boston, MA
02111-
1307 USA
191 Everyone is permitted to copy and distribute verbatim
192 copies of this license document, but changing it is not allowed.
197 <P>The licenses for most software are designed to take away your
198 freedom to share and change it. By contrast, the GNU General Public
199 License is intended to guarantee your freedom to share and change free
200 software--to make sure the software is free for all its users. This
201 General Public License applies to most of the Free Software
202 Foundation's software and to any other program whose authors commit to
203 using it. (Some other Free Software Foundation software is covered by
204 the GNU Library General Public License instead.) You can apply it to
207 <P>When we speak of free software, we are referring to freedom, not
208 price. Our General Public Licenses are designed to make sure that you
209 have the freedom to distribute copies of free software (and charge for
210 this service if you wish), that you receive source code or can get it
211 if you want it, that you can change the software or use pieces of it
212 in new free programs; and that you know you can do these things.
214 <P>To protect your rights, we need to make restrictions that forbid
215 anyone to deny you these rights or to ask you to surrender the rights.
216 These restrictions translate to certain responsibilities for you if you
217 distribute copies of the software, or if you modify it.
219 <P>For example, if you distribute copies of such a program, whether
220 gratis or for a fee, you must give the recipients all the rights that
221 you have. You must make sure that they, too, receive or can get the
222 source code. And you must show them these terms so they know their
225 <P>We protect your rights with two steps: (
1) copyright the software, and
226 (
2) offer you this license which gives you legal permission to copy,
227 distribute and/or modify the software.
229 <P>Also, for each author's protection and ours, we want to make certain
230 that everyone understands that there is no warranty for this free
231 software. If the software is modified by someone else and passed on, we
232 want its recipients to know that what they have is not the original, so
233 that any problems introduced by others will not reflect on the original
234 authors' reputations.
236 <P>Finally, any free program is threatened constantly by software
237 patents. We wish to avoid the danger that redistributors of a free
238 program will individually obtain patent licenses, in effect making the
239 program proprietary. To prevent this, we have made it clear that any
240 patent must be licensed for everyone's free use or not licensed at all.
242 <P>The precise terms and conditions for copying, distribution and
245 <H3>GNU GENERAL PUBLIC LICENSE
<BR>
246 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
</H3>
250 <LI>This License applies to any program or other work which contains
251 a notice placed by the copyright holder saying it may be distributed
252 under the terms of this General Public License. The
"Program", below,
253 refers to any such program or work, and a
"work based on the Program"
254 means either the Program or any derivative work under copyright law:
255 that is to say, a work containing the Program or a portion of it,
256 either verbatim or with modifications and/or translated into another
257 language. (Hereinafter, translation is included without limitation in
258 the term
"modification".) Each licensee is addressed as
"you".
260 <P>Activities other than copying, distribution and modification are not
261 covered by this License; they are outside its scope. The act of
262 running the Program is not restricted, and the output from the Program
263 is covered only if its contents constitute a work based on the
264 Program (independent of having been made by running the Program).
265 Whether that is true depends on what the Program does.
267 <LI>You may copy and distribute verbatim copies of the Program's
268 source code as you receive it, in any medium, provided that you
269 conspicuously and appropriately publish on each copy an appropriate
270 copyright notice and disclaimer of warranty; keep intact all the
271 notices that refer to this License and to the absence of any warranty;
272 and give any other recipients of the Program a copy of this License
273 along with the Program.
275 <P>You may charge a fee for the physical act of transferring a copy, and
276 you may at your option offer warranty protection in exchange for a fee.
278 <LI>You may modify your copy or copies of the Program or any portion
279 of it, thus forming a work based on the Program, and copy and
280 distribute such modifications or work under the terms of Section
1
281 above, provided that you also meet all of these conditions:
285 <LI>You must cause the modified files to carry prominent notices
286 stating that you changed the files and the date of any change.
288 <LI>You must cause any work that you distribute or publish, that in
289 whole or in part contains or is derived from the Program or any
290 part thereof, to be licensed as a whole at no charge to all third
291 parties under the terms of this License.
293 <LI>if the modified program normally reads commands interactively
294 when run, you must cause it, when started running for such
295 interactive use in the most ordinary way, to print or display an
296 announcement including an appropriate copyright notice and a
297 notice that there is no warranty (or else, saying that you provide
298 a warranty) and that users may redistribute the program under
299 these conditions, and telling the user how to view a copy of this
300 License. (Exception: if the Program itself is interactive but
301 does not normally print such an announcement, your work based on
302 the Program is not required to print an announcement.)
306 <P>These requirements apply to the modified work as a whole. If
307 identifiable sections of that work are not derived from the Program,
308 and can be reasonably considered independent and separate works in
309 themselves, then this License, and its terms, do not apply to those
310 sections when you distribute them as separate works. But when you
311 distribute the same sections as part of a whole which is a work based
312 on the Program, the distribution of the whole must be on the terms of
313 this License, whose permissions for other licensees extend to the
314 entire whole, and thus to each and every part regardless of who wrote it.
316 <P>Thus, it is not the intent of this section to claim rights or contest
317 your rights to work written entirely by you; rather, the intent is to
318 exercise the right to control the distribution of derivative or
319 collective works based on the Program.
321 <P>In addition, mere aggregation of another work not based on the Program
322 with the Program (or with a work based on the Program) on a volume of
323 a storage or distribution medium does not bring the other work under
324 the scope of this License.
326 <LI>You may copy and distribute the Program (or a work based on it,
327 under Section
2) in object code or executable form under the terms of
328 Sections
1 and
2 above provided that you also do one of the following:
332 <LI>Accompany it with the complete corresponding machine-readable
333 source code, which must be distributed under the terms of Sections
334 1 and
2 above on a medium customarily used for software interchange; or,
336 <LI>Accompany it with a written offer, valid for at least three
337 years, to give any third party, for a charge no more than your
338 cost of physically performing source distribution, a complete
339 machine-readable copy of the corresponding source code, to be
340 distributed under the terms of Sections
1 and
2 above on a medium
341 customarily used for software interchange; or,
343 <LI>Accompany it with the information you received as to the offer
344 to distribute corresponding source code. (This alternative is
345 allowed only for noncommercial distribution and only if you
346 received the program in object code or executable form with such
347 an offer, in accord with Subsection b above.)
351 <P>The source code for a work means the preferred form of the work for
352 making modifications to it. For an executable work, complete source
353 code means all the source code for all modules it contains, plus any
354 associated interface definition files, plus the scripts used to
355 control compilation and installation of the executable. However, as a
356 special exception, the source code distributed need not include
357 anything that is normally distributed (in either source or binary
358 form) with the major components (compiler, kernel, and so on) of the
359 operating system on which the executable runs, unless that component
360 itself accompanies the executable.
362 <P>If distribution of executable or object code is made by offering
363 access to copy from a designated place, then offering equivalent
364 access to copy the source code from the same place counts as
365 distribution of the source code, even though third parties are not
366 compelled to copy the source along with the object code.
368 <LI>You may not copy, modify, sublicense, or distribute the Program
369 except as expressly provided under this License. Any attempt
370 otherwise to copy, modify, sublicense or distribute the Program is
371 void, and will automatically terminate your rights under this License.
372 However, parties who have received copies, or rights, from you under
373 this License will not have their licenses terminated so long as such
374 parties remain in full compliance.
376 <LI>You are not required to accept this License, since you have not
377 signed it. However, nothing else grants you permission to modify or
378 distribute the Program or its derivative works. These actions are
379 prohibited by law if you do not accept this License. Therefore, by
380 modifying or distributing the Program (or any work based on the
381 Program), you indicate your acceptance of this License to do so, and
382 all its terms and conditions for copying, distributing or modifying
383 the Program or works based on it.
385 <LI>Each time you redistribute the Program (or any work based on the
386 Program), the recipient automatically receives a license from the
387 original licensor to copy, distribute or modify the Program subject to
388 these terms and conditions. You may not impose any further
389 restrictions on the recipients' exercise of the rights granted herein.
390 You are not responsible for enforcing compliance by third parties to
393 <LI>If, as a consequence of a court judgment or allegation of patent
394 infringement or for any other reason (not limited to patent issues),
395 conditions are imposed on you (whether by court order, agreement or
396 otherwise) that contradict the conditions of this License, they do not
397 excuse you from the conditions of this License. If you cannot
398 distribute so as to satisfy simultaneously your obligations under this
399 License and any other pertinent obligations, then as a consequence you
400 may not distribute the Program at all. For example, if a patent
401 license would not permit royalty-free redistribution of the Program by
402 all those who receive copies directly or indirectly through you, then
403 the only way you could satisfy both it and this License would be to
404 refrain entirely from distribution of the Program.
406 <P>If any portion of this section is held invalid or unenforceable under
407 any particular circumstance, the balance of the section is intended to
408 apply and the section as a whole is intended to apply in other
411 <P>It is not the purpose of this section to induce you to infringe any
412 patents or other property right claims or to contest validity of any
413 such claims; this section has the sole purpose of protecting the
414 integrity of the free software distribution system, which is
415 implemented by public license practices. Many people have made
416 generous contributions to the wide range of software distributed
417 through that system in reliance on consistent application of that
418 system; it is up to the author/donor to decide if he or she is willing
419 to distribute software through any other system and a licensee cannot
422 <P>This section is intended to make thoroughly clear what is believed to
423 be a consequence of the rest of this License.
425 <LI>If the distribution and/or use of the Program is restricted in
426 certain countries either by patents or by copyrighted interfaces, the
427 original copyright holder who places the Program under this License
428 may add an explicit geographical distribution limitation excluding
429 those countries, so that distribution is permitted only in or among
430 countries not thus excluded. In such case, this License incorporates
431 the limitation as if written in the body of this License.
433 <LI>The Free Software Foundation may publish revised and/or new versions
434 of the General Public License from time to time. Such new versions will
435 be similar in spirit to the present version, but may differ in detail to
436 address new problems or concerns.
438 <P>Each version is given a distinguishing version number. If the Program
439 specifies a version number of this License which applies to it and
"any
440 later version", you have the option of following the terms and conditions
441 either of that version or of any later version published by the Free
442 Software Foundation. If the Program does not specify a version number of
443 this License, you may choose any version ever published by the Free Software
446 <LI>If you wish to incorporate parts of the Program into other free
447 programs whose distribution conditions are different, write to the author
448 to ask for permission. For software which is copyrighted by the Free
449 Software Foundation, write to the Free Software Foundation; we sometimes
450 make exceptions for this. Our decision will be guided by the two goals
451 of preserving the free status of all derivatives of our free software and
452 of promoting the sharing and reuse of software generally.
460 <LI>BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
461 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
462 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
463 PROVIDE THE PROGRAM
"AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
464 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
465 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
466 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
467 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
468 REPAIR OR CORRECTION.
470 <LI>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
471 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
472 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
473 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
474 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
475 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
476 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
477 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
478 POSSIBILITY OF SUCH DAMAGES.
482 <H3>END OF TERMS AND CONDITIONS
</H3>
484 <H3>How to Apply These Terms to Your New Programs
</H3>
486 <P>If you develop a new program, and you want it to be of the greatest
487 possible use to the public, the best way to achieve this is to make it
488 free software which everyone can redistribute and change under these terms.
490 <P>To do so, attach the following notices to the program. It is safest
491 to attach them to the start of each source file to most effectively
492 convey the exclusion of warranty; and each file should have at least
493 the
"copyright" line and a pointer to where the full notice is found.
496 <VAR>one line to give the program's name and an idea of what it does.
</VAR>
497 Copyright (C)
<VAR>yyyy
</VAR> <VAR>name of author
</VAR>
499 This program is free software; you can redistribute it and/or
500 modify it under the terms of the GNU General Public License
501 as published by the Free Software Foundation; either version
2
502 of the License, or (at your option) any later version.
504 This program is distributed in the hope that it will be useful,
505 but WITHOUT ANY WARRANTY; without even the implied warranty of
506 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
507 GNU General Public License for more details.
509 You should have received a copy of the GNU General Public License
510 along with this program; if not, write to the Free Software
511 Foundation, Inc.,
59 Temple Place - Suite
330, Boston, MA
02111-
1307, USA.
514 <P>Also add information on how to contact you by electronic and paper mail.
516 <P>If the program is interactive, make it output a short notice like this
517 when it starts in an interactive mode:
520 Gnomovision version
69, Copyright (C)
<VAR>year
</VAR> <VAR>name of author
</VAR>
521 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
522 type `show w'. This is free software, and you are welcome
523 to redistribute it under certain conditions; type `show c'
527 <P>The hypothetical commands
<SAMP>`show w'
</SAMP> and
<SAMP>`show c'
</SAMP> should show
528 the appropriate parts of the General Public License. Of course, the
529 commands you use may be called something other than
<SAMP>`show w'
</SAMP> and
530 <SAMP>`show c'
</SAMP>; they could even be mouse-clicks or menu items--whatever
533 <P>You should also get your employer (if you work as a programmer) or your
534 school, if any, to sign a
"copyright disclaimer" for the program, if
535 necessary. Here is a sample; alter the names:
538 Yoyodyne, Inc., hereby disclaims all copyright
539 interest in the program `Gnomovision'
540 (which makes passes at compilers) written
543 <VAR>signature of Ty Coon
</VAR>,
1 April
1989
544 Ty Coon, President of Vice
547 <H2 CLASS=
"title"><A NAME=
"LGPL">GNU LIBRARY GENERAL PUBLIC LICENSE
</A></H2>
549 <P>Version
2, June
1991
552 Copyright (C)
1991 Free Software Foundation, Inc.
553 59 Temple Place - Suite
330, Boston, MA
02111-
1307, USA
554 Everyone is permitted to copy and distribute verbatim copies
555 of this license document, but changing it is not allowed.
557 [This is the first released version of the library GPL. It is
558 numbered
2 because it goes with version
2 of the ordinary GPL.]
563 <P>The licenses for most software are designed to take away your
564 freedom to share and change it. By contrast, the GNU General Public
565 Licenses are intended to guarantee your freedom to share and change
566 free software--to make sure the software is free for all its users.
568 <P>This license, the Library General Public License, applies to some
569 specially designated Free Software Foundation software, and to any
570 other libraries whose authors decide to use it. You can use it for
573 <P>When we speak of free software, we are referring to freedom, not
574 price. Our General Public Licenses are designed to make sure that you
575 have the freedom to distribute copies of free software (and charge for
576 this service if you wish), that you receive source code or can get it
577 if you want it, that you can change the software or use pieces of it
578 in new free programs; and that you know you can do these things.
580 <P>To protect your rights, we need to make restrictions that forbid
581 anyone to deny you these rights or to ask you to surrender the rights.
582 These restrictions translate to certain responsibilities for you if
583 you distribute copies of the library, or if you modify it.
585 <P>For example, if you distribute copies of the library, whether gratis
586 or for a fee, you must give the recipients all the rights that we gave
587 you. You must make sure that they, too, receive or can get the source
588 code. If you link a program with the library, you must provide
589 complete object files to the recipients so that they can relink them
590 with the library, after making changes to the library and recompiling
591 it. And you must show them these terms so they know their rights.
593 <P>Our method of protecting your rights has two steps: (
1) copyright
594 the library, and (
2) offer you this license which gives you legal
595 permission to copy, distribute and/or modify the library.
597 <P>Also, for each distributor's protection, we want to make certain
598 that everyone understands that there is no warranty for this free
599 library. If the library is modified by someone else and passed on, we
600 want its recipients to know that what they have is not the original
601 version, so that any problems introduced by others will not reflect on
602 the original authors' reputations.
604 <P>Finally, any free program is threatened constantly by software
605 patents. We wish to avoid the danger that companies distributing free
606 software will individually obtain patent licenses, thus in effect
607 transforming the program into proprietary software. To prevent this,
608 we have made it clear that any patent must be licensed for everyone's
609 free use or not licensed at all.
611 <P>Most GNU software, including some libraries, is covered by the ordinary
612 GNU General Public License, which was designed for utility programs. This
613 license, the GNU Library General Public License, applies to certain
614 designated libraries. This license is quite different from the ordinary
615 one; be sure to read it in full, and don't assume that anything in it is
616 the same as in the ordinary license.
618 <P>The reason we have a separate public license for some libraries is that
619 they blur the distinction we usually make between modifying or adding to a
620 program and simply using it. Linking a program with a library, without
621 changing the library, is in some sense simply using the library, and is
622 analogous to running a utility program or application program. However, in
623 a textual and legal sense, the linked executable is a combined work, a
624 derivative of the original library, and the ordinary General Public License
627 <P>Because of this blurred distinction, using the ordinary General
628 Public License for libraries did not effectively promote software
629 sharing, because most developers did not use the libraries. We
630 concluded that weaker conditions might promote sharing better.
632 <P>However, unrestricted linking of non-free programs would deprive the
633 users of those programs of all benefit from the free status of the
634 libraries themselves. This Library General Public License is intended to
635 permit developers of non-free programs to use free libraries, while
636 preserving your freedom as a user of such programs to change the free
637 libraries that are incorporated in them. (We have not seen how to achieve
638 this as regards changes in header files, but we have achieved it as regards
639 changes in the actual functions of the Library.) The hope is that this
640 will lead to faster development of free libraries.
642 <P>The precise terms and conditions for copying, distribution and
643 modification follow. Pay close attention to the difference between a
644 "work based on the library" and a
"work that uses the library". The
645 former contains code derived from the library, while the latter only
646 works together with the library.
648 <P>Note that it is possible for a library to be covered by the ordinary
649 General Public License rather than by this special one.
651 <H3>TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
</H3>
653 <P><STRONG>0.
</STRONG>
654 This License Agreement applies to any software library which
655 contains a notice placed by the copyright holder or other authorized
656 party saying it may be distributed under the terms of this Library
657 General Public License (also called
"this License"). Each licensee is
660 <P>A
"library" means a collection of software functions and/or data
661 prepared so as to be conveniently linked with application programs
662 (which use some of those functions and data) to form executables.
664 <P>The
"Library", below, refers to any such software library or work
665 which has been distributed under these terms. A
"work based on the
666 Library" means either the Library or any derivative work under
667 copyright law: that is to say, a work containing the Library or a
668 portion of it, either verbatim or with modifications and/or translated
669 straightforwardly into another language. (Hereinafter, translation is
670 included without limitation in the term
"modification".)
672 <P>"Source code" for a work means the preferred form of the work for
673 making modifications to it. For a library, complete source code means
674 all the source code for all modules it contains, plus any associated
675 interface definition files, plus the scripts used to control compilation
676 and installation of the library.
678 <P>Activities other than copying, distribution and modification are not
679 covered by this License; they are outside its scope. The act of
680 running a program using the Library is not restricted, and output from
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1070 <P>That's all there is to it!