doc/help/license.html

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   4         <TITLE>Software License Agreement</TITLE>
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   6 <BODY>
   7
   8 <P ALIGN="CENTER">Copyright 2007-2009 by Apple Inc.<BR>
   9 1 Infinite Loop<BR>
  10 Cupertino, CA 95014 USA<BR>
  11 <BR>
  12 WWW: <A HREF="http://www.cups.org/">http://www.cups.org/</A>
  13
  14 <H2 CLASS="title"><A NAME="INTRO">Introduction</A></H2>
  15
  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>
  22
  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>
  29
  30 <P>For those not familiar with the GNU GPL, the license basically
  31 allows you to:</P>
  32
  33 <UL>
  34
  35         <LI>Use the CUPS software at no charge.</LI>
  36
  37         <LI>Distribute verbatim copies of the software in source
  38         or binary form.</LI>
  39
  40         <LI>Sell verbatim copies of the software for a media
  41         fee, or sell support for the software.</LI>
  42
  43 </UL>
  44
  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>
  53
  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>
  58
  59
  60 <H2 CLASS="title"><A NAME="EXCEPTIONS">License Exceptions</A></H2>
  61
  62 <P>In addition, as the copyright holder of CUPS, Apple Inc. grants
  63 the following special exceptions:</P>
  64
  65 <OL>
  66
  67         <LI><B>Apple Operating System Development License
  68         Exception</B>;
  69
  70         <OL TYPE="a">
  71
  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>
  92
  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>
 100
 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>
 105
 106                 <LI>All CUPS software that falls under this
 107                 license exception have the following text at the
 108                 top of each source file:
 109
 110                 <BLOCKQUOTE>This file is subject to the Apple
 111                 OS-Developed Software
 112                 exception.</BLOCKQUOTE></LI>
 113
 114         </OL>
 115
 116         <LI><B>OpenSSL Toolkit License Exception</B>;
 117
 118         <OL TYPE="a">
 119
 120                 <LI>Apple Inc. explicitly allows the
 121                 compilation and distribution of the CUPS
 122                 software with the OpenSSL Toolkit.</LI>
 123
 124         </OL>
 125
 126 </OL>
 127
 128 <P>No developer is required to provide these exceptions in a
 129 derived work.</P>
 130
 131
 132 <H2 CLASS="title"><A NAME="KERBEROS">Kerberos Support Code</A></H2>
 133
 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>
 138
 139 <P>Sources files containing KSC have the following text at the top
 140 of each source file:</P>
 141
 142 <BLOCKQUOTE>This file contains Kerberos support code, copyright
 143 2006 by Jelmer Vernooij.</BLOCKQUOTE>
 144
 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>
 149
 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
 153 restrictions:</P>
 154
 155 <OL>
 156
 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
 161         required.</LI>
 162
 163         <LI>Altered source versions must be plainly marked as
 164         such, and must not be misrepresented as being the
 165         original software.</LI>
 166
 167         <LI>This notice may not be removed or altered from any
 168         source distribution.</LI>
 169
 170 </OL>
 171
 172
 173 <H2 CLASS="title"><A NAME="TRADEMARKS">Trademarks</A></H2>
 174
 175 <P>CUPS and the CUPS logo are trademarks of Apple Inc. You may use the name and
 176 logo in any direct port or binary distribution of CUPS. Please contact Apple
 177 Inc. for written permission to use them in derivative products. Our intention is
 178 to protect the value of these trademarks and ensure that any derivative product
 179 meets the same high-quality standards as the original.</P>
 180
 181
 182 <H2 CLASS="title"><A NAME="GPL">GNU GENERAL PUBLIC LICENSE</A></H2>
 183
 184 <P>Version 2, June 1991
 185
 186 <PRE>
 187 Copyright 1989, 1991 Free Software Foundation, Inc.
 188 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 189
 190 Everyone is permitted to copy and distribute verbatim
 191 copies of this license document, but changing it is not allowed.
 192 </PRE>
 193
 194 <H3>Preamble</H3>
 195
 196 <P>The licenses for most software are designed to take away your
 197 freedom to share and change it.  By contrast, the GNU General Public
 198 License is intended to guarantee your freedom to share and change free
 199 software--to make sure the software is free for all its users.  This
 200 General Public License applies to most of the Free Software
 201 Foundation's software and to any other program whose authors commit to
 202 using it.  (Some other Free Software Foundation software is covered by
 203 the GNU Library General Public License instead.)  You can apply it to
 204 your programs, too.
 205
 206 <P>When we speak of free software, we are referring to freedom, not
 207 price.  Our General Public Licenses are designed to make sure that you
 208 have the freedom to distribute copies of free software (and charge for
 209 this service if you wish), that you receive source code or can get it
 210 if you want it, that you can change the software or use pieces of it
 211 in new free programs; and that you know you can do these things.
 212
 213 <P>To protect your rights, we need to make restrictions that forbid
 214 anyone to deny you these rights or to ask you to surrender the rights.
 215 These restrictions translate to certain responsibilities for you if you
 216 distribute copies of the software, or if you modify it.
 217
 218 <P>For example, if you distribute copies of such a program, whether
 219 gratis or for a fee, you must give the recipients all the rights that
 220 you have.  You must make sure that they, too, receive or can get the
 221 source code.  And you must show them these terms so they know their
 222 rights.
 223
 224 <P>We protect your rights with two steps: (1) copyright the software, and
 225 (2) offer you this license which gives you legal permission to copy,
 226 distribute and/or modify the software.
 227
 228 <P>Also, for each author's protection and ours, we want to make certain
 229 that everyone understands that there is no warranty for this free
 230 software.  If the software is modified by someone else and passed on, we
 231 want its recipients to know that what they have is not the original, so
 232 that any problems introduced by others will not reflect on the original
 233 authors' reputations.
 234
 235 <P>Finally, any free program is threatened constantly by software
 236 patents.  We wish to avoid the danger that redistributors of a free
 237 program will individually obtain patent licenses, in effect making the
 238 program proprietary.  To prevent this, we have made it clear that any
 239 patent must be licensed for everyone's free use or not licensed at all.
 240
 241 <P>The precise terms and conditions for copying, distribution and
 242 modification follow.
 243
 244 <H3>GNU GENERAL PUBLIC LICENSE<BR>
 245 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</H3>
 246
 247 <OL START="0">
 248
 249 <LI>This License applies to any program or other work which contains
 250 a notice placed by the copyright holder saying it may be distributed
 251 under the terms of this General Public License.  The "Program", below,
 252 refers to any such program or work, and a "work based on the Program"
 253 means either the Program or any derivative work under copyright law:
 254 that is to say, a work containing the Program or a portion of it,
 255 either verbatim or with modifications and/or translated into another
 256 language.  (Hereinafter, translation is included without limitation in
 257 the term "modification".)  Each licensee is addressed as "you".
 258
 259 <P>Activities other than copying, distribution and modification are not
 260 covered by this License; they are outside its scope.  The act of
 261 running the Program is not restricted, and the output from the Program
 262 is covered only if its contents constitute a work based on the
 263 Program (independent of having been made by running the Program).
 264 Whether that is true depends on what the Program does.
 265
 266 <LI>You may copy and distribute verbatim copies of the Program's
 267 source code as you receive it, in any medium, provided that you
 268 conspicuously and appropriately publish on each copy an appropriate
 269 copyright notice and disclaimer of warranty; keep intact all the
 270 notices that refer to this License and to the absence of any warranty;
 271 and give any other recipients of the Program a copy of this License
 272 along with the Program.
 273
 274 <P>You may charge a fee for the physical act of transferring a copy, and
 275 you may at your option offer warranty protection in exchange for a fee.
 276
 277 <LI>You may modify your copy or copies of the Program or any portion
 278 of it, thus forming a work based on the Program, and copy and
 279 distribute such modifications or work under the terms of Section 1
 280 above, provided that you also meet all of these conditions:
 281
 282 <OL TYPE="a">
 283
 284 <LI>You must cause the modified files to carry prominent notices
 285 stating that you changed the files and the date of any change.
 286
 287 <LI>You must cause any work that you distribute or publish, that in
 288 whole or in part contains or is derived from the Program or any
 289 part thereof, to be licensed as a whole at no charge to all third
 290 parties under the terms of this License.
 291
 292 <LI>if the modified program normally reads commands interactively
 293 when run, you must cause it, when started running for such
 294 interactive use in the most ordinary way, to print or display an
 295 announcement including an appropriate copyright notice and a
 296 notice that there is no warranty (or else, saying that you provide
 297 a warranty) and that users may redistribute the program under
 298 these conditions, and telling the user how to view a copy of this
 299 License.  (Exception: if the Program itself is interactive but
 300 does not normally print such an announcement, your work based on
 301 the Program is not required to print an announcement.)
 302
 303 </OL>
 304
 305 <P>These requirements apply to the modified work as a whole.  If
 306 identifiable sections of that work are not derived from the Program,
 307 and can be reasonably considered independent and separate works in
 308 themselves, then this License, and its terms, do not apply to those
 309 sections when you distribute them as separate works.  But when you
 310 distribute the same sections as part of a whole which is a work based
 311 on the Program, the distribution of the whole must be on the terms of
 312 this License, whose permissions for other licensees extend to the
 313 entire whole, and thus to each and every part regardless of who wrote it.
 314
 315 <P>Thus, it is not the intent of this section to claim rights or contest
 316 your rights to work written entirely by you; rather, the intent is to
 317 exercise the right to control the distribution of derivative or
 318 collective works based on the Program.
 319
 320 <P>In addition, mere aggregation of another work not based on the Program
 321 with the Program (or with a work based on the Program) on a volume of
 322 a storage or distribution medium does not bring the other work under
 323 the scope of this License.
 324
 325 <LI>You may copy and distribute the Program (or a work based on it,
 326 under Section 2) in object code or executable form under the terms of
 327 Sections 1 and 2 above provided that you also do one of the following:
 328
 329 <OL TYPE="a">
 330
 331 <LI>Accompany it with the complete corresponding machine-readable
 332 source code, which must be distributed under the terms of Sections
 333 1 and 2 above on a medium customarily used for software interchange; or,
 334
 335 <LI>Accompany it with a written offer, valid for at least three
 336 years, to give any third party, for a charge no more than your
 337 cost of physically performing source distribution, a complete
 338 machine-readable copy of the corresponding source code, to be
 339 distributed under the terms of Sections 1 and 2 above on a medium
 340 customarily used for software interchange; or,
 341
 342 <LI>Accompany it with the information you received as to the offer
 343 to distribute corresponding source code.  (This alternative is
 344 allowed only for noncommercial distribution and only if you
 345 received the program in object code or executable form with such
 346 an offer, in accord with Subsection b above.)
 347
 348 </OL>
 349
 350 <P>The source code for a work means the preferred form of the work for
 351 making modifications to it.  For an executable work, complete source
 352 code means all the source code for all modules it contains, plus any
 353 associated interface definition files, plus the scripts used to
 354 control compilation and installation of the executable.  However, as a
 355 special exception, the source code distributed need not include
 356 anything that is normally distributed (in either source or binary
 357 form) with the major components (compiler, kernel, and so on) of the
 358 operating system on which the executable runs, unless that component
 359 itself accompanies the executable.
 360
 361 <P>If distribution of executable or object code is made by offering
 362 access to copy from a designated place, then offering equivalent
 363 access to copy the source code from the same place counts as
 364 distribution of the source code, even though third parties are not
 365 compelled to copy the source along with the object code.
 366
 367 <LI>You may not copy, modify, sublicense, or distribute the Program
 368 except as expressly provided under this License.  Any attempt
 369 otherwise to copy, modify, sublicense or distribute the Program is
 370 void, and will automatically terminate your rights under this License.
 371 However, parties who have received copies, or rights, from you under
 372 this License will not have their licenses terminated so long as such
 373 parties remain in full compliance.
 374
 375 <LI>You are not required to accept this License, since you have not
 376 signed it.  However, nothing else grants you permission to modify or
 377 distribute the Program or its derivative works.  These actions are
 378 prohibited by law if you do not accept this License.  Therefore, by
 379 modifying or distributing the Program (or any work based on the
 380 Program), you indicate your acceptance of this License to do so, and
 381 all its terms and conditions for copying, distributing or modifying
 382 the Program or works based on it.
 383
 384 <LI>Each time you redistribute the Program (or any work based on the
 385 Program), the recipient automatically receives a license from the
 386 original licensor to copy, distribute or modify the Program subject to
 387 these terms and conditions.  You may not impose any further
 388 restrictions on the recipients' exercise of the rights granted herein.
 389 You are not responsible for enforcing compliance by third parties to
 390 this License.
 391
 392 <LI>If, as a consequence of a court judgment or allegation of patent
 393 infringement or for any other reason (not limited to patent issues),
 394 conditions are imposed on you (whether by court order, agreement or
 395 otherwise) that contradict the conditions of this License, they do not
 396 excuse you from the conditions of this License.  If you cannot
 397 distribute so as to satisfy simultaneously your obligations under this
 398 License and any other pertinent obligations, then as a consequence you
 399 may not distribute the Program at all.  For example, if a patent
 400 license would not permit royalty-free redistribution of the Program by
 401 all those who receive copies directly or indirectly through you, then
 402 the only way you could satisfy both it and this License would be to
 403 refrain entirely from distribution of the Program.
 404
 405 <P>If any portion of this section is held invalid or unenforceable under
 406 any particular circumstance, the balance of the section is intended to
 407 apply and the section as a whole is intended to apply in other
 408 circumstances.
 409
 410 <P>It is not the purpose of this section to induce you to infringe any
 411 patents or other property right claims or to contest validity of any
 412 such claims; this section has the sole purpose of protecting the
 413 integrity of the free software distribution system, which is
 414 implemented by public license practices.  Many people have made
 415 generous contributions to the wide range of software distributed
 416 through that system in reliance on consistent application of that
 417 system; it is up to the author/donor to decide if he or she is willing
 418 to distribute software through any other system and a licensee cannot
 419 impose that choice.
 420
 421 <P>This section is intended to make thoroughly clear what is believed to
 422 be a consequence of the rest of this License.
 423
 424 <LI>If the distribution and/or use of the Program is restricted in
 425 certain countries either by patents or by copyrighted interfaces, the
 426 original copyright holder who places the Program under this License
 427 may add an explicit geographical distribution limitation excluding
 428 those countries, so that distribution is permitted only in or among
 429 countries not thus excluded.  In such case, this License incorporates
 430 the limitation as if written in the body of this License.
 431
 432 <LI>The Free Software Foundation may publish revised and/or new versions
 433 of the General Public License from time to time.  Such new versions will
 434 be similar in spirit to the present version, but may differ in detail to
 435 address new problems or concerns.
 436
 437 <P>Each version is given a distinguishing version number.  If the Program
 438 specifies a version number of this License which applies to it and "any
 439 later version", you have the option of following the terms and conditions
 440 either of that version or of any later version published by the Free
 441 Software Foundation.  If the Program does not specify a version number of
 442 this License, you may choose any version ever published by the Free Software
 443 Foundation.
 444
 445 <LI>If you wish to incorporate parts of the Program into other free
 446 programs whose distribution conditions are different, write to the author
 447 to ask for permission.  For software which is copyrighted by the Free
 448 Software Foundation, write to the Free Software Foundation; we sometimes
 449 make exceptions for this.  Our decision will be guided by the two goals
 450 of preserving the free status of all derivatives of our free software and
 451 of promoting the sharing and reuse of software generally.
 452
 453 </OL>
 454
 455 <H3>NO WARRANTY</H3>
 456
 457 <OL START="11">
 458
 459 <LI>BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 460 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
 461 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
 462 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
 463 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 464 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
 465 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
 466 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
 467 REPAIR OR CORRECTION.
 468
 469 <LI>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 470 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 471 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 472 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
 473 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
 474 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
 475 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 476 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 477 POSSIBILITY OF SUCH DAMAGES.
 478
 479 </OL>
 480
 481 <H3>END OF TERMS AND CONDITIONS</H3>
 482
 483 <H3>How to Apply These Terms to Your New Programs</H3>
 484
 485 <P>If you develop a new program, and you want it to be of the greatest
 486 possible use to the public, the best way to achieve this is to make it
 487 free software which everyone can redistribute and change under these terms.
 488
 489 <P>To do so, attach the following notices to the program.  It is safest
 490 to attach them to the start of each source file to most effectively
 491 convey the exclusion of warranty; and each file should have at least
 492 the "copyright" line and a pointer to where the full notice is found.
 493
 494 <PRE>
 495 <VAR>one line to give the program's name and an idea of what it does.</VAR>
 496 Copyright (C) <VAR>yyyy</VAR>  <VAR>name of author</VAR>
 497
 498 This program is free software; you can redistribute it and/or
 499 modify it under the terms of the GNU General Public License
 500 as published by the Free Software Foundation; either version 2
 501 of the License, or (at your option) any later version.
 502
 503 This program is distributed in the hope that it will be useful,
 504 but WITHOUT ANY WARRANTY; without even the implied warranty of
 505 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 506 GNU General Public License for more details.
 507
 508 You should have received a copy of the GNU General Public License
 509 along with this program; if not, write to the Free Software
 510 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 511 </PRE>
 512
 513 <P>Also add information on how to contact you by electronic and paper mail.
 514
 515 <P>If the program is interactive, make it output a short notice like this
 516 when it starts in an interactive mode:
 517
 518 <PRE>
 519 Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>
 520 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
 521 type `show w'.  This is free software, and you are welcome
 522 to redistribute it under certain conditions; type `show c'
 523 for details.
 524 </PRE>
 525
 526 <P>The hypothetical commands <SAMP>`show w'</SAMP> and <SAMP>`show c'</SAMP> should show
 527 the appropriate parts of the General Public License.  Of course, the
 528 commands you use may be called something other than <SAMP>`show w'</SAMP> and
 529 <SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever
 530 suits your program.
 531
 532 <P>You should also get your employer (if you work as a programmer) or your
 533 school, if any, to sign a "copyright disclaimer" for the program, if
 534 necessary.  Here is a sample; alter the names:
 535
 536 <PRE>
 537 Yoyodyne, Inc., hereby disclaims all copyright
 538 interest in the program `Gnomovision'
 539 (which makes passes at compilers) written
 540 by James Hacker.
 541
 542 <VAR>signature of Ty Coon</VAR>, 1 April 1989
 543 Ty Coon, President of Vice
 544 </PRE>
 545
 546 <H2 CLASS="title"><A NAME="LGPL">GNU LIBRARY GENERAL PUBLIC LICENSE</A></H2>
 547
 548 <P>Version 2, June 1991
 549
 550 <PRE>
 551 Copyright (C) 1991 Free Software Foundation, Inc.
 552 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
 553 Everyone is permitted to copy and distribute verbatim copies
 554 of this license document, but changing it is not allowed.
 555
 556 [This is the first released version of the library GPL.  It is
 557  numbered 2 because it goes with version 2 of the ordinary GPL.]
 558 </PRE>
 559
 560 <H3>Preamble</H3>
 561
 562 <P>The licenses for most software are designed to take away your
 563 freedom to share and change it.  By contrast, the GNU General Public
 564 Licenses are intended to guarantee your freedom to share and change
 565 free software--to make sure the software is free for all its users.
 566
 567 <P>This license, the Library General Public License, applies to some
 568 specially designated Free Software Foundation software, and to any
 569 other libraries whose authors decide to use it.  You can use it for
 570 your libraries, too.
 571
 572 <P>When we speak of free software, we are referring to freedom, not
 573 price.  Our General Public Licenses are designed to make sure that you
 574 have the freedom to distribute copies of free software (and charge for
 575 this service if you wish), that you receive source code or can get it
 576 if you want it, that you can change the software or use pieces of it
 577 in new free programs; and that you know you can do these things.
 578
 579 <P>To protect your rights, we need to make restrictions that forbid
 580 anyone to deny you these rights or to ask you to surrender the rights.
 581 These restrictions translate to certain responsibilities for you if
 582 you distribute copies of the library, or if you modify it.
 583
 584 <P>For example, if you distribute copies of the library, whether gratis
 585 or for a fee, you must give the recipients all the rights that we gave
 586 you.  You must make sure that they, too, receive or can get the source
 587 code.  If you link a program with the library, you must provide
 588 complete object files to the recipients so that they can relink them
 589 with the library, after making changes to the library and recompiling
 590 it.  And you must show them these terms so they know their rights.
 591
 592 <P>Our method of protecting your rights has two steps: (1) copyright
 593 the library, and (2) offer you this license which gives you legal
 594 permission to copy, distribute and/or modify the library.
 595
 596 <P>Also, for each distributor's protection, we want to make certain
 597 that everyone understands that there is no warranty for this free
 598 library.  If the library is modified by someone else and passed on, we
 599 want its recipients to know that what they have is not the original
 600 version, so that any problems introduced by others will not reflect on
 601 the original authors' reputations.
 602
 603 <P>Finally, any free program is threatened constantly by software
 604 patents.  We wish to avoid the danger that companies distributing free
 605 software will individually obtain patent licenses, thus in effect
 606 transforming the program into proprietary software.  To prevent this,
 607 we have made it clear that any patent must be licensed for everyone's
 608 free use or not licensed at all.
 609
 610 <P>Most GNU software, including some libraries, is covered by the ordinary
 611 GNU General Public License, which was designed for utility programs.  This
 612 license, the GNU Library General Public License, applies to certain
 613 designated libraries.  This license is quite different from the ordinary
 614 one; be sure to read it in full, and don't assume that anything in it is
 615 the same as in the ordinary license.
 616
 617 <P>The reason we have a separate public license for some libraries is that
 618 they blur the distinction we usually make between modifying or adding to a
 619 program and simply using it.  Linking a program with a library, without
 620 changing the library, is in some sense simply using the library, and is
 621 analogous to running a utility program or application program.  However, in
 622 a textual and legal sense, the linked executable is a combined work, a
 623 derivative of the original library, and the ordinary General Public License
 624 treats it as such.
 625
 626 <P>Because of this blurred distinction, using the ordinary General
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1022 <H3>How to Apply These Terms to Your New Libraries</H3>
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1060 <PRE>
1061 Yoyodyne, Inc., hereby disclaims all copyright interest in
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1064
1065 <VAR>signature of Ty Coon</VAR>, 1 April 1990
1066 Ty Coon, President of Vice
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