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45dec87e | 1 | Common UNIX Printing System License Agreement |
2 | ||
71649dc9 | 3 | Copyright 1997-2004 by Easy Software Products |
45dec87e | 4 | 44141 AIRPORT VIEW DR STE 204 |
5 | HOLLYWOOD, MARYLAND 20636-3111 USA | |
6 | ||
e338c390 | 7 | Voice: +1.301.373.9600 |
45dec87e | 8 | Email: cups-info@cups.org |
9 | WWW: http://www.cups.org | |
10 | ||
5d66e133 | 11 | |
1a7e760e | 12 | INTRODUCTION |
45dec87e | 13 | |
a05dd8fd | 14 | The Common UNIX Printing System(tm), ("CUPS(tm)"), is provided |
15 | under the GNU General Public License ("GPL") and GNU Library | |
16 | General Public License ("LGPL"), Version 2, with exceptions for | |
17 | Apple operating systems and the OpenSSL toolkit. A copy of the | |
18 | exceptions and licenses follow this introduction. | |
19 | ||
20 | The GNU LGPL applies to the CUPS API library, located in the | |
21 | "cups" subdirectory of the CUPS source distribution and in the | |
22 | "cups" include directory and library files in the binary | |
23 | distributions. The GNU GPL applies to the remainder of the CUPS | |
24 | distribution, including the "pdftops" filter which is based upon | |
25 | Xpdf and the CUPS imaging library. | |
26 | ||
27 | For those not familiar with the GNU GPL, the license basically | |
28 | allows you to: | |
1a7e760e | 29 | |
5d66e133 | 30 | - Use the CUPS software at no charge. |
a05dd8fd | 31 | - Distribute verbatim copies of the software in source or |
32 | binary form. | |
33 | - Sell verbatim copies of the software for a media fee, or | |
34 | sell support for the software. | |
35 | - Distribute or sell printer drivers and filters that use | |
36 | CUPS so long as source code is made available under the | |
37 | GPL. | |
38 | ||
39 | What this license *does not* allow you to do is make changes or | |
40 | add features to CUPS and then sell a binary distribution without | |
41 | source code. You must provide source for any new drivers, | |
42 | changes, or additions to the software, and all code must be | |
43 | provided under the GPL or LGPL as appropriate. The only | |
44 | exceptions to this are the portions of the CUPS software covered | |
45 | by the Apple operating system license exceptions outlined later | |
46 | in this license agreement. | |
47 | ||
48 | The GNU LGPL relaxes the "link-to" restriction, allowing you to | |
49 | develop applications that use the CUPS API library under other | |
50 | licenses and/or conditions as appropriate for your application. | |
51 | ||
52 | ||
53 | LICENSE EXCEPTIONS | |
54 | ||
55 | In addition, as the copyright holder of CUPS, Easy Software | |
56 | Products grants the following special exceptions: | |
57 | ||
58 | 1. Apple Operating System Development License Exception; | |
59 | ||
60 | a. Software that is developed by any person or entity | |
61 | for an Apple Operating System ("Apple OS-Developed | |
62 | Software"), including but not limited to Apple and | |
63 | third party printer drivers, filters, and backends | |
64 | for an Apple Operating System, that is linked to the | |
65 | CUPS imaging library or based on any sample filters | |
66 | or backends provided with CUPS shall not be | |
67 | considered to be a derivative work or collective work | |
68 | based on the CUPS program and is exempt from the | |
69 | mandatory source code release clauses of the GNU GPL. | |
70 | You may therefore distribute linked combinations of | |
71 | the CUPS imaging library with Apple OS-Developed | |
72 | Software without releasing the source code of the | |
73 | Apple OS-Developed Software. You may also use sample | |
74 | filters and backends provided with CUPS to develop | |
75 | Apple OS-Developed Software without releasing the | |
76 | source code of the Apple OS-Developed Software. | |
77 | ||
78 | b. An Apple Operating System means any operating system | |
79 | software developed and/or marketed by Apple Computer, | |
80 | Inc., including but not limited to all existing | |
81 | releases and versions of Apple's Darwin, Mac OS X, | |
82 | and Mac OS X Server products and all follow-on | |
83 | releases and future versions thereof. | |
84 | ||
85 | c. This exception is only available for Apple | |
86 | OS-Developed Software and does not apply to software | |
87 | that is distributed for use on other operating | |
88 | systems. | |
89 | ||
90 | d. All CUPS software that falls under this license | |
91 | exception have the following text at the top of each | |
92 | source file: | |
93 | ||
94 | This file is subject to the Apple OS-Developed | |
95 | Software exception. | |
96 | ||
97 | 2. OpenSSL Toolkit License Exception; | |
98 | ||
99 | a. Easy Software Products explicitly allows the | |
100 | compilation and distribution of the CUPS software | |
101 | with the OpenSSL Toolkit. | |
102 | ||
103 | No developer is required to provide these exceptions in a | |
104 | derived work. | |
89a471b5 | 105 | |
106 | ||
1a7e760e | 107 | TRADEMARKS |
108 | ||
a05dd8fd | 109 | Easy Software Products has trademarked the Common UNIX Printing |
110 | System, CUPS, and CUPS logo. These names and logos may be used | |
111 | freely in any direct port or binary distribution of CUPS. Please | |
112 | contract Easy Software Products for written permission to use | |
113 | them in derivative products. Our intention is to protect the | |
114 | value of these trademarks and ensure that any derivative product | |
115 | meets the same high-quality standards as the original. | |
45dec87e | 116 | |
1a7e760e | 117 | |
118 | BINARY DISTRIBUTION RIGHTS | |
45dec87e | 119 | |
a05dd8fd | 120 | Easy Software Products also sells rights to the CUPS source code |
121 | under a binary distribution license for vendors that are unable | |
122 | to release source code for their drivers, additions, and | |
123 | modifications to CUPS under the GNU GPL and LGPL. For | |
124 | information please contact us at the address shown above. | |
45dec87e | 125 | |
a05dd8fd | 126 | The Common UNIX Printing System provides a "pdftops" filter that |
127 | is based on the Xpdf software. For binary distribution licensing | |
128 | of this software, please contact: | |
5d66e133 | 129 | |
130 | Derek B. Noonburg | |
131 | Email: derekn@foolabs.com | |
132 | WWW: http://www.foolabs.com/xpdf/ | |
133 | ||
45dec87e | 134 | |
1a7e760e | 135 | SUPPORT |
45dec87e | 136 | |
a05dd8fd | 137 | Easy Software Products sells software support for CUPS as well |
138 | as a commercial printing product based on CUPS called ESP Print | |
139 | Pro. You can find out more at our web site: | |
45dec87e | 140 | |
a05dd8fd | 141 | http://www.easysw.com/ |
0beadd9e | 142 | \f |
143 | GNU GENERAL PUBLIC LICENSE | |
144 | Version 2, June 1991 | |
45dec87e | 145 | |
0beadd9e | 146 | Copyright (C) 1989, 1991 Free Software Foundation, Inc. |
147 | 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
148 | Everyone is permitted to copy and distribute verbatim copies | |
149 | of this license document, but changing it is not allowed. | |
45dec87e | 150 | |
0beadd9e | 151 | Preamble |
45dec87e | 152 | |
0beadd9e | 153 | The licenses for most software are designed to take away your |
1a7e760e | 154 | freedom to share and change it. By contrast, the GNU General Public |
155 | License is intended to guarantee your freedom to share and change free | |
156 | software--to make sure the software is free for all its users. This | |
157 | General Public License applies to most of the Free Software | |
158 | Foundation's software and to any other program whose authors commit to | |
159 | using it. (Some other Free Software Foundation software is covered by | |
160 | the GNU Library General Public License instead.) You can apply it to | |
161 | your programs, too. | |
162 | ||
0beadd9e | 163 | When we speak of free software, we are referring to freedom, not |
1a7e760e | 164 | price. Our General Public Licenses are designed to make sure that you |
165 | have the freedom to distribute copies of free software (and charge for | |
166 | this service if you wish), that you receive source code or can get it | |
167 | if you want it, that you can change the software or use pieces of it | |
168 | in new free programs; and that you know you can do these things. | |
169 | ||
0beadd9e | 170 | To protect your rights, we need to make restrictions that forbid |
1a7e760e | 171 | anyone to deny you these rights or to ask you to surrender the rights. |
172 | These restrictions translate to certain responsibilities for you if you | |
173 | distribute copies of the software, or if you modify it. | |
174 | ||
0beadd9e | 175 | For example, if you distribute copies of such a program, whether |
1a7e760e | 176 | gratis or for a fee, you must give the recipients all the rights that |
177 | you have. You must make sure that they, too, receive or can get the | |
178 | source code. And you must show them these terms so they know their | |
179 | rights. | |
180 | ||
0beadd9e | 181 | We protect your rights with two steps: (1) copyright the software, and |
1a7e760e | 182 | (2) offer you this license which gives you legal permission to copy, |
183 | distribute and/or modify the software. | |
184 | ||
0beadd9e | 185 | Also, for each author's protection and ours, we want to make certain |
1a7e760e | 186 | that everyone understands that there is no warranty for this free |
187 | software. If the software is modified by someone else and passed on, we | |
188 | want its recipients to know that what they have is not the original, so | |
189 | that any problems introduced by others will not reflect on the original | |
190 | authors' reputations. | |
191 | ||
0beadd9e | 192 | Finally, any free program is threatened constantly by software |
1a7e760e | 193 | patents. We wish to avoid the danger that redistributors of a free |
194 | program will individually obtain patent licenses, in effect making the | |
195 | program proprietary. To prevent this, we have made it clear that any | |
196 | patent must be licensed for everyone's free use or not licensed at all. | |
197 | ||
0beadd9e | 198 | The precise terms and conditions for copying, distribution and |
1a7e760e | 199 | modification follow. |
0beadd9e | 200 | \f |
201 | GNU GENERAL PUBLIC LICENSE | |
202 | TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
203 | ||
204 | 0. This License applies to any program or other work which contains | |
205 | a notice placed by the copyright holder saying it may be distributed | |
206 | under the terms of this General Public License. The "Program", below, | |
207 | refers to any such program or work, and a "work based on the Program" | |
208 | means either the Program or any derivative work under copyright law: | |
209 | that is to say, a work containing the Program or a portion of it, | |
210 | either verbatim or with modifications and/or translated into another | |
211 | language. (Hereinafter, translation is included without limitation in | |
212 | the term "modification".) Each licensee is addressed as "you". | |
213 | ||
214 | Activities other than copying, distribution and modification are not | |
215 | covered by this License; they are outside its scope. The act of | |
216 | running the Program is not restricted, and the output from the Program | |
217 | is covered only if its contents constitute a work based on the | |
218 | Program (independent of having been made by running the Program). | |
219 | Whether that is true depends on what the Program does. | |
220 | ||
221 | 1. You may copy and distribute verbatim copies of the Program's | |
1a7e760e | 222 | source code as you receive it, in any medium, provided that you |
223 | conspicuously and appropriately publish on each copy an appropriate | |
0beadd9e | 224 | copyright notice and disclaimer of warranty; keep intact all the |
225 | notices that refer to this License and to the absence of any warranty; | |
226 | and give any other recipients of the Program a copy of this License | |
227 | along with the Program. | |
228 | ||
229 | You may charge a fee for the physical act of transferring a copy, and | |
230 | you may at your option offer warranty protection in exchange for a fee. | |
231 | ||
232 | 2. You may modify your copy or copies of the Program or any portion | |
233 | of it, thus forming a work based on the Program, and copy and | |
234 | distribute such modifications or work under the terms of Section 1 | |
235 | above, provided that you also meet all of these conditions: | |
236 | ||
237 | a) You must cause the modified files to carry prominent notices | |
238 | stating that you changed the files and the date of any change. | |
239 | ||
240 | b) You must cause any work that you distribute or publish, that in | |
241 | whole or in part contains or is derived from the Program or any | |
242 | part thereof, to be licensed as a whole at no charge to all third | |
243 | parties under the terms of this License. | |
244 | ||
245 | c) If the modified program normally reads commands interactively | |
246 | when run, you must cause it, when started running for such | |
247 | interactive use in the most ordinary way, to print or display an | |
248 | announcement including an appropriate copyright notice and a | |
249 | notice that there is no warranty (or else, saying that you provide | |
250 | a warranty) and that users may redistribute the program under | |
251 | these conditions, and telling the user how to view a copy of this | |
252 | License. (Exception: if the Program itself is interactive but | |
253 | does not normally print such an announcement, your work based on | |
254 | the Program is not required to print an announcement.) | |
255 | \f | |
256 | These requirements apply to the modified work as a whole. If | |
257 | identifiable sections of that work are not derived from the Program, | |
258 | and can be reasonably considered independent and separate works in | |
259 | themselves, then this License, and its terms, do not apply to those | |
260 | sections when you distribute them as separate works. But when you | |
261 | distribute the same sections as part of a whole which is a work based | |
262 | on the Program, the distribution of the whole must be on the terms of | |
263 | this License, whose permissions for other licensees extend to the | |
264 | entire whole, and thus to each and every part regardless of who wrote it. | |
265 | ||
266 | Thus, it is not the intent of this section to claim rights or contest | |
267 | your rights to work written entirely by you; rather, the intent is to | |
268 | exercise the right to control the distribution of derivative or | |
269 | collective works based on the Program. | |
270 | ||
271 | In addition, mere aggregation of another work not based on the Program | |
272 | with the Program (or with a work based on the Program) on a volume of | |
273 | a storage or distribution medium does not bring the other work under | |
274 | the scope of this License. | |
275 | ||
276 | 3. You may copy and distribute the Program (or a work based on it, | |
277 | under Section 2) in object code or executable form under the terms of | |
278 | Sections 1 and 2 above provided that you also do one of the following: | |
279 | ||
280 | a) Accompany it with the complete corresponding machine-readable | |
281 | source code, which must be distributed under the terms of Sections | |
282 | 1 and 2 above on a medium customarily used for software interchange; or, | |
283 | ||
284 | b) Accompany it with a written offer, valid for at least three | |
285 | years, to give any third party, for a charge no more than your | |
286 | cost of physically performing source distribution, a complete | |
287 | machine-readable copy of the corresponding source code, to be | |
288 | distributed under the terms of Sections 1 and 2 above on a medium | |
289 | customarily used for software interchange; or, | |
290 | ||
291 | c) Accompany it with the information you received as to the offer | |
292 | to distribute corresponding source code. (This alternative is | |
293 | allowed only for noncommercial distribution and only if you | |
294 | received the program in object code or executable form with such | |
295 | an offer, in accord with Subsection b above.) | |
296 | ||
297 | The source code for a work means the preferred form of the work for | |
298 | making modifications to it. For an executable work, complete source | |
299 | code means all the source code for all modules it contains, plus any | |
300 | associated interface definition files, plus the scripts used to | |
301 | control compilation and installation of the executable. However, as a | |
302 | special exception, the source code distributed need not include | |
303 | anything that is normally distributed (in either source or binary | |
304 | form) with the major components (compiler, kernel, and so on) of the | |
305 | operating system on which the executable runs, unless that component | |
306 | itself accompanies the executable. | |
307 | ||
308 | If distribution of executable or object code is made by offering | |
309 | access to copy from a designated place, then offering equivalent | |
310 | access to copy the source code from the same place counts as | |
311 | distribution of the source code, even though third parties are not | |
312 | compelled to copy the source along with the object code. | |
313 | \f | |
314 | 4. You may not copy, modify, sublicense, or distribute the Program | |
315 | except as expressly provided under this License. Any attempt | |
316 | otherwise to copy, modify, sublicense or distribute the Program is | |
317 | void, and will automatically terminate your rights under this License. | |
318 | However, parties who have received copies, or rights, from you under | |
319 | this License will not have their licenses terminated so long as such | |
320 | parties remain in full compliance. | |
321 | ||
322 | 5. You are not required to accept this License, since you have not | |
323 | signed it. However, nothing else grants you permission to modify or | |
324 | distribute the Program or its derivative works. These actions are | |
325 | prohibited by law if you do not accept this License. Therefore, by | |
326 | modifying or distributing the Program (or any work based on the | |
327 | Program), you indicate your acceptance of this License to do so, and | |
328 | all its terms and conditions for copying, distributing or modifying | |
329 | the Program or works based on it. | |
330 | ||
331 | 6. Each time you redistribute the Program (or any work based on the | |
332 | Program), the recipient automatically receives a license from the | |
333 | original licensor to copy, distribute or modify the Program subject to | |
334 | these terms and conditions. You may not impose any further | |
335 | restrictions on the recipients' exercise of the rights granted herein. | |
336 | You are not responsible for enforcing compliance by third parties to | |
1a7e760e | 337 | this License. |
338 | ||
0beadd9e | 339 | 7. If, as a consequence of a court judgment or allegation of patent |
1a7e760e | 340 | infringement or for any other reason (not limited to patent issues), |
341 | conditions are imposed on you (whether by court order, agreement or | |
342 | otherwise) that contradict the conditions of this License, they do not | |
0beadd9e | 343 | excuse you from the conditions of this License. If you cannot |
344 | distribute so as to satisfy simultaneously your obligations under this | |
345 | License and any other pertinent obligations, then as a consequence you | |
346 | may not distribute the Program at all. For example, if a patent | |
347 | license would not permit royalty-free redistribution of the Program by | |
348 | all those who receive copies directly or indirectly through you, then | |
349 | the only way you could satisfy both it and this License would be to | |
350 | refrain entirely from distribution of the Program. | |
351 | ||
352 | If any portion of this section is held invalid or unenforceable under | |
353 | any particular circumstance, the balance of the section is intended to | |
354 | apply and the section as a whole is intended to apply in other | |
355 | circumstances. | |
356 | ||
357 | It is not the purpose of this section to induce you to infringe any | |
358 | patents or other property right claims or to contest validity of any | |
359 | such claims; this section has the sole purpose of protecting the | |
360 | integrity of the free software distribution system, which is | |
361 | implemented by public license practices. Many people have made | |
362 | generous contributions to the wide range of software distributed | |
363 | through that system in reliance on consistent application of that | |
364 | system; it is up to the author/donor to decide if he or she is willing | |
365 | to distribute software through any other system and a licensee cannot | |
366 | impose that choice. | |
367 | ||
368 | This section is intended to make thoroughly clear what is believed to | |
369 | be a consequence of the rest of this License. | |
370 | \f | |
371 | 8. If the distribution and/or use of the Program is restricted in | |
372 | certain countries either by patents or by copyrighted interfaces, the | |
373 | original copyright holder who places the Program under this License | |
374 | may add an explicit geographical distribution limitation excluding | |
375 | those countries, so that distribution is permitted only in or among | |
376 | countries not thus excluded. In such case, this License incorporates | |
377 | the limitation as if written in the body of this License. | |
378 | ||
379 | 9. The Free Software Foundation may publish revised and/or new versions | |
380 | of the General Public License from time to time. Such new versions will | |
1a7e760e | 381 | be similar in spirit to the present version, but may differ in detail to |
382 | address new problems or concerns. | |
383 | ||
0beadd9e | 384 | Each version is given a distinguishing version number. If the Program |
1a7e760e | 385 | specifies a version number of this License which applies to it and "any |
386 | later version", you have the option of following the terms and conditions | |
387 | either of that version or of any later version published by the Free | |
0beadd9e | 388 | Software Foundation. If the Program does not specify a version number of |
389 | this License, you may choose any version ever published by the Free Software | |
1a7e760e | 390 | Foundation. |
391 | ||
0beadd9e | 392 | 10. If you wish to incorporate parts of the Program into other free |
393 | programs whose distribution conditions are different, write to the author | |
394 | to ask for permission. For software which is copyrighted by the Free | |
1a7e760e | 395 | Software Foundation, write to the Free Software Foundation; we sometimes |
0beadd9e | 396 | make exceptions for this. Our decision will be guided by the two goals |
397 | of preserving the free status of all derivatives of our free software and | |
398 | of promoting the sharing and reuse of software generally. | |
1a7e760e | 399 | |
0beadd9e | 400 | NO WARRANTY |
1a7e760e | 401 | |
0beadd9e | 402 | 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
403 | FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN | |
1a7e760e | 404 | OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
0beadd9e | 405 | PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED |
1a7e760e | 406 | OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
0beadd9e | 407 | MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS |
408 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE | |
409 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, | |
410 | REPAIR OR CORRECTION. | |
1a7e760e | 411 | |
0beadd9e | 412 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
1a7e760e | 413 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
0beadd9e | 414 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, |
1a7e760e | 415 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING |
0beadd9e | 416 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED |
417 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY | |
418 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER | |
419 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE | |
1a7e760e | 420 | POSSIBILITY OF SUCH DAMAGES. |
45dec87e | 421 | |
0beadd9e | 422 | END OF TERMS AND CONDITIONS |
423 | \f | |
424 | GNU LIBRARY GENERAL PUBLIC LICENSE | |
425 | Version 2, June 1991 | |
426 | ||
427 | Copyright (C) 1991 Free Software Foundation, Inc. | |
428 | 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
429 | ||
430 | Everyone is permitted to copy and distribute verbatim copies | |
431 | of this license document, but changing it is not allowed. | |
432 | ||
433 | [This is the first released version of the library GPL. It is | |
434 | numbered 2 because it goes with version 2 of the ordinary GPL.] | |
435 | ||
436 | Preamble | |
437 | ||
438 | The licenses for most software are designed to take away your | |
439 | freedom to share and change it. By contrast, the GNU General Public | |
440 | Licenses are intended to guarantee your freedom to share and change | |
441 | free software--to make sure the software is free for all its users. | |
442 | ||
443 | This license, the Library General Public License, applies to some | |
444 | specially designated Free Software Foundation software, and to any | |
445 | other libraries whose authors decide to use it. You can use it for | |
446 | your libraries, too. | |
447 | ||
448 | When we speak of free software, we are referring to freedom, not | |
449 | price. Our General Public Licenses are designed to make sure that you | |
450 | have the freedom to distribute copies of free software (and charge for | |
451 | this service if you wish), that you receive source code or can get it | |
452 | if you want it, that you can change the software or use pieces of it | |
453 | in new free programs; and that you know you can do these things. | |
454 | ||
455 | To protect your rights, we need to make restrictions that forbid | |
456 | anyone to deny you these rights or to ask you to surrender the rights. | |
457 | These restrictions translate to certain responsibilities for you if | |
458 | you distribute copies of the library, or if you modify it. | |
459 | ||
460 | For example, if you distribute copies of the library, whether gratis | |
461 | or for a fee, you must give the recipients all the rights that we gave | |
462 | you. You must make sure that they, too, receive or can get the source | |
463 | code. If you link a program with the library, you must provide | |
464 | complete object files to the recipients so that they can relink them | |
465 | with the library, after making changes to the library and recompiling | |
466 | it. And you must show them these terms so they know their rights. | |
467 | ||
468 | Our method of protecting your rights has two steps: (1) copyright | |
469 | the library, and (2) offer you this license which gives you legal | |
470 | permission to copy, distribute and/or modify the library. | |
471 | ||
472 | Also, for each distributor's protection, we want to make certain | |
473 | that everyone understands that there is no warranty for this free | |
474 | library. If the library is modified by someone else and passed on, we | |
475 | want its recipients to know that what they have is not the original | |
476 | version, so that any problems introduced by others will not reflect on | |
477 | the original authors' reputations. | |
478 | \f | |
479 | Finally, any free program is threatened constantly by software | |
480 | patents. We wish to avoid the danger that companies distributing free | |
481 | software will individually obtain patent licenses, thus in effect | |
482 | transforming the program into proprietary software. To prevent this, | |
483 | we have made it clear that any patent must be licensed for everyone's | |
484 | free use or not licensed at all. | |
485 | ||
486 | Most GNU software, including some libraries, is covered by the ordinary | |
487 | GNU General Public License, which was designed for utility programs. This | |
488 | license, the GNU Library General Public License, applies to certain | |
489 | designated libraries. This license is quite different from the ordinary | |
490 | one; be sure to read it in full, and don't assume that anything in it is | |
491 | the same as in the ordinary license. | |
492 | ||
493 | The reason we have a separate public license for some libraries is that | |
494 | they blur the distinction we usually make between modifying or adding to a | |
495 | program and simply using it. Linking a program with a library, without | |
496 | changing the library, is in some sense simply using the library, and is | |
497 | analogous to running a utility program or application program. However, in | |
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