doc/help/license.html

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   4         <TITLE>Software License Agreement</TITLE>
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   7
   8 <P ALIGN="CENTER">Copyright 1997-2007 by Easy Software Products<BR>
   9 44141 AIRPORT VIEW DR STE 204<BR>
  10 HOLLYWOOD, MARYLAND 20636 USA<BR>
  11 <BR>
  12 Voice: +1.301.373.9600<BR>
  13 Email: <A HREF="mailto:cups-info@cups.org">cups-info@cups.org</A><BR>
  14 WWW: <A HREF="http://www.cups.org">http://www.cups.org</A>
  15
  16 <H2 CLASS="title"><A NAME="INTRO">Introduction</A></H2>
  17
  18 <P>The Common UNIX Printing System<SUP>TM</SUP>,
  19 ("CUPS<SUP>TM</SUP>"), is provided under the GNU General Public
  20 License ("GPL") and GNU Library General Public License ("LGPL"),
  21 Version 2, with exceptions for Apple operating systems and the
  22 OpenSSL toolkit. A copy of the exceptions and licenses follow
  23 this introduction.</P>
  24
  25 <P>The GNU LGPL applies to the CUPS and CUPS Imaging libraries
  26 located in the "cups" and "filter" subdirectories of the CUPS
  27 source distribution and in the "cups" include directory and
  28 library files in the binary distributions. The GNU GPL applies to
  29 the remainder of the CUPS distribution, including the "pdftops"
  30 filter which is based upon Xpdf.</P>
  31
  32 <P>For those not familiar with the GNU GPL, the license basically
  33 allows you to:</P>
  34
  35 <UL>
  36
  37         <LI>Use the CUPS software at no charge.</LI>
  38
  39         <LI>Distribute verbatim copies of the software in source
  40         or binary form.</LI>
  41
  42         <LI>Sell verbatim copies of the software for a media
  43         fee, or sell support for the software.</LI>
  44
  45 </UL>
  46
  47 <P>What this license <EM>does not</EM> allow you to do is make
  48 changes or add features to CUPS and then sell a binary
  49 distribution without source code. You must provide source for any
  50 changes or additions to the software, and all code must be
  51 provided under the GPL or LGPL as appropriate. The only
  52 exceptions to this are the portions of the CUPS software covered
  53 by the Apple operating system license exceptions outlined later
  54 in this license agreement.</P>
  55
  56 <P>The GNU LGPL relaxes the "link-to" restriction, allowing you
  57 to develop applications that use the CUPS and CUPS Imaging
  58 libraries under other licenses and/or conditions as appropriate
  59 for your application, driver, or filter.</P>
  60
  61
  62 <H2 CLASS="title"><A NAME="EXCEPTIONS">License Exceptions</A></H2>
  63
  64 <P>In addition, as the copyright holder of CUPS, Easy Software
  65 Products grants the following special exceptions:</P>
  66
  67 <OL>
  68
  69         <LI><B>Apple Operating System Development License
  70         Exception</B>;
  71
  72         <OL TYPE="a">
  73
  74                 <LI>Software that is developed by any person or
  75                 entity for an Apple Operating System ("Apple
  76                 OS-Developed Software"), including but not
  77                 limited to Apple and third party printer
  78                 drivers, filters, and backends for an Apple
  79                 Operating System, that is linked to the CUPS
  80                 imaging library or based on any sample filters
  81                 or backends provided with CUPS shall not be
  82                 considered to be a derivative work or collective
  83                 work based on the CUPS program and is exempt
  84                 from the mandatory source code release clauses
  85                 of the GNU GPL. You may therefore distribute
  86                 linked combinations of the CUPS imaging library
  87                 with Apple OS-Developed Software without
  88                 releasing the source code of the Apple
  89                 OS-Developed Software. You may also use sample
  90                 filters and backends provided with CUPS to
  91                 develop Apple OS-Developed Software without
  92                 releasing the source code of the Apple
  93                 OS-Developed Software.</LI>
  94
  95                 <LI>An Apple Operating System means any
  96                 operating system software developed and/or
  97                 marketed by Apple Computer, Inc., including but
  98                 not limited to all existing releases and
  99                 versions of Apple's Darwin, Mac OS X, and Mac OS
 100                 X Server products and all follow-on releases and
 101                 future versions thereof.</LI>
 102
 103                 <LI>This exception is only available for Apple
 104                 OS-Developed Software and does not apply to
 105                 software that is distributed for use on other
 106                 operating systems.</LI>
 107
 108                 <LI>All CUPS software that falls under this
 109                 license exception have the following text at the
 110                 top of each source file:
 111
 112                 <BLOCKQUOTE>This file is subject to the Apple
 113                 OS-Developed Software
 114                 exception.</BLOCKQUOTE></LI>
 115
 116         </OL>
 117
 118         <LI><B>OpenSSL Toolkit License Exception</B>;
 119
 120         <OL TYPE="a">
 121
 122                 <LI>Easy Software Products explicitly allows the
 123                 compilation and distribution of the CUPS
 124                 software with the OpenSSL Toolkit.</LI>
 125
 126         </OL>
 127
 128 </OL>
 129
 130 <P>No developer is required to provide these exceptions in a
 131 derived work.</P>
 132
 133
 134 <H2 CLASS="title"><A NAME="KERBEROS">Kerberos Support Code</A></H2>
 135
 136 <P>The Kerberos support code ("KSC") is copyright 2006 by Jelmer
 137 Vernooij and is provided 'as-is', without any express or implied
 138 warranty. In no event will the author or Easy Software Products
 139 be held liable for any damages arising from the use of the
 140 KSC.</P>
 141
 142 <P>Sources files containing KSC have the following text at the top
 143 of each source file:</P>
 144
 145 <BLOCKQUOTE>This file contains Kerberos support code, copyright
 146 2006 by Jelmer Vernooij.</BLOCKQUOTE>
 147
 148 <P>The KSC copyright and license apply <EM>only</EM> to
 149 Kerberos-related feature code in CUPS. Such code is typically
 150 conditionally compiled based on the present of the
 151 <TT>HAVE_GSSAPI</TT> preprocessor definition.</P>
 152
 153 <P>Permission is granted to anyone to use the KSC for any
 154 purpose, including commercial applications, and to alter it and
 155 redistribute it freely, subject to the following
 156 restrictions:</P>
 157
 158 <OL>
 159
 160         <LI>The origin of the KSC must not be misrepresented; you
 161         must not claim that you wrote the original software. If
 162         you use the KSC in a product, an acknowledgment in the
 163         product documentation would be appreciated but is not
 164         required.</LI>
 165
 166         <LI>Altered source versions must be plainly marked as
 167         such, and must not be misrepresented as being the
 168         original software.</LI>
 169
 170         <LI>This notice may not be removed or altered from any
 171         source distribution.</LI>
 172
 173 </OL>
 174
 175
 176 <H2 CLASS="title"><A NAME="TRADEMARKS">Trademarks</A></H2>
 177
 178 <P>Easy Software Products has trademarked the Common UNIX
 179 Printing System, CUPS, and CUPS logo. You may use these names and
 180 logos in any direct port or binary distribution of CUPS. Please
 181 contact Easy Software Products for written permission to use them
 182 in derivative products. Our intention is to protect the value of
 183 these trademarks and ensure that any derivative product meets the
 184 same high-quality standards as the original.</P>
 185
 186
 187 <H2 CLASS="title"><A NAME="BINARY">Binary Distribution Rights</A></H2>
 188
 189 <P>Easy Software Products also sells rights to the CUPS source
 190 code under a binary distribution license for vendors that are
 191 unable to release source code for their additions and
 192 modifications to CUPS under the GNU GPL and LGPL. For information
 193 please contact us at the address shown above.</P>
 194
 195 <P>The Common UNIX Printing System provides a "pdftops" filter
 196 that is based on the Xpdf software. For binary distribution
 197 licensing of this software, please contact:</P>
 198
 199 <BLOCKQUOTE>
 200 Derek B. Noonburg<BR>
 201 Email: <A HREF="mailto:derekn@glyphandcog.com">derekn@glyphandcog.com</A><BR>
 202 WWW: <A HREF="http://www.glyphandcog.com/">http://www.glyphandcog.com/</A>
 203 </BLOCKQUOTE>
 204
 205
 206 <H2 CLASS="title"><A NAME="SUPPORT">Support</A></H2>
 207
 208 <P>Easy Software Products sells software support for CUPS as well
 209 as a commercial printing product based on CUPS called ESP Print
 210 Pro. You can find out more at our web site:</P>
 211
 212 <UL><PRE>
 213 <A HREF="http://www.easysw.com/">http://www.easysw.com/</A>
 214 </PRE></UL>
 215
 216
 217 <H2 CLASS="title"><A NAME="GPL">GNU GENERAL PUBLIC LICENSE</A></H2>
 218
 219 <P>Version 2, June 1991
 220
 221 <PRE>
 222 Copyright 1989, 1991 Free Software Foundation, Inc.
 223 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 224
 225 Everyone is permitted to copy and distribute verbatim
 226 copies of this license document, but changing it is not allowed.
 227 </PRE>
 228
 229 <H3>Preamble</H3>
 230
 231 <P>The licenses for most software are designed to take away your
 232 freedom to share and change it.  By contrast, the GNU General Public
 233 License is intended to guarantee your freedom to share and change free
 234 software--to make sure the software is free for all its users.  This
 235 General Public License applies to most of the Free Software
 236 Foundation's software and to any other program whose authors commit to
 237 using it.  (Some other Free Software Foundation software is covered by
 238 the GNU Library General Public License instead.)  You can apply it to
 239 your programs, too.
 240
 241 <P>When we speak of free software, we are referring to freedom, not
 242 price.  Our General Public Licenses are designed to make sure that you
 243 have the freedom to distribute copies of free software (and charge for
 244 this service if you wish), that you receive source code or can get it
 245 if you want it, that you can change the software or use pieces of it
 246 in new free programs; and that you know you can do these things.
 247
 248 <P>To protect your rights, we need to make restrictions that forbid
 249 anyone to deny you these rights or to ask you to surrender the rights.
 250 These restrictions translate to certain responsibilities for you if you
 251 distribute copies of the software, or if you modify it.
 252
 253 <P>For example, if you distribute copies of such a program, whether
 254 gratis or for a fee, you must give the recipients all the rights that
 255 you have.  You must make sure that they, too, receive or can get the
 256 source code.  And you must show them these terms so they know their
 257 rights.
 258
 259 <P>We protect your rights with two steps: (1) copyright the software, and
 260 (2) offer you this license which gives you legal permission to copy,
 261 distribute and/or modify the software.
 262
 263 <P>Also, for each author's protection and ours, we want to make certain
 264 that everyone understands that there is no warranty for this free
 265 software.  If the software is modified by someone else and passed on, we
 266 want its recipients to know that what they have is not the original, so
 267 that any problems introduced by others will not reflect on the original
 268 authors' reputations.
 269
 270 <P>Finally, any free program is threatened constantly by software
 271 patents.  We wish to avoid the danger that redistributors of a free
 272 program will individually obtain patent licenses, in effect making the
 273 program proprietary.  To prevent this, we have made it clear that any
 274 patent must be licensed for everyone's free use or not licensed at all.
 275
 276 <P>The precise terms and conditions for copying, distribution and
 277 modification follow.
 278
 279 <H3>GNU GENERAL PUBLIC LICENSE<BR>
 280 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION</H3>
 281
 282 <OL START="0">
 283
 284 <LI>This License applies to any program or other work which contains
 285 a notice placed by the copyright holder saying it may be distributed
 286 under the terms of this General Public License.  The "Program", below,
 287 refers to any such program or work, and a "work based on the Program"
 288 means either the Program or any derivative work under copyright law:
 289 that is to say, a work containing the Program or a portion of it,
 290 either verbatim or with modifications and/or translated into another
 291 language.  (Hereinafter, translation is included without limitation in
 292 the term "modification".)  Each licensee is addressed as "you".
 293
 294 <P>Activities other than copying, distribution and modification are not
 295 covered by this License; they are outside its scope.  The act of
 296 running the Program is not restricted, and the output from the Program
 297 is covered only if its contents constitute a work based on the
 298 Program (independent of having been made by running the Program).
 299 Whether that is true depends on what the Program does.
 300
 301 <LI>You may copy and distribute verbatim copies of the Program's
 302 source code as you receive it, in any medium, provided that you
 303 conspicuously and appropriately publish on each copy an appropriate
 304 copyright notice and disclaimer of warranty; keep intact all the
 305 notices that refer to this License and to the absence of any warranty;
 306 and give any other recipients of the Program a copy of this License
 307 along with the Program.
 308
 309 <P>You may charge a fee for the physical act of transferring a copy, and
 310 you may at your option offer warranty protection in exchange for a fee.
 311
 312 <LI>You may modify your copy or copies of the Program or any portion
 313 of it, thus forming a work based on the Program, and copy and
 314 distribute such modifications or work under the terms of Section 1
 315 above, provided that you also meet all of these conditions:
 316
 317 <OL TYPE="a">
 318
 319 <LI>You must cause the modified files to carry prominent notices
 320 stating that you changed the files and the date of any change.
 321
 322 <LI>You must cause any work that you distribute or publish, that in
 323 whole or in part contains or is derived from the Program or any
 324 part thereof, to be licensed as a whole at no charge to all third
 325 parties under the terms of this License.
 326
 327 <LI>if the modified program normally reads commands interactively
 328 when run, you must cause it, when started running for such
 329 interactive use in the most ordinary way, to print or display an
 330 announcement including an appropriate copyright notice and a
 331 notice that there is no warranty (or else, saying that you provide
 332 a warranty) and that users may redistribute the program under
 333 these conditions, and telling the user how to view a copy of this
 334 License.  (Exception: if the Program itself is interactive but
 335 does not normally print such an announcement, your work based on
 336 the Program is not required to print an announcement.)
 337
 338 </OL>
 339
 340 <P>These requirements apply to the modified work as a whole.  If
 341 identifiable sections of that work are not derived from the Program,
 342 and can be reasonably considered independent and separate works in
 343 themselves, then this License, and its terms, do not apply to those
 344 sections when you distribute them as separate works.  But when you
 345 distribute the same sections as part of a whole which is a work based
 346 on the Program, the distribution of the whole must be on the terms of
 347 this License, whose permissions for other licensees extend to the
 348 entire whole, and thus to each and every part regardless of who wrote it.
 349
 350 <P>Thus, it is not the intent of this section to claim rights or contest
 351 your rights to work written entirely by you; rather, the intent is to
 352 exercise the right to control the distribution of derivative or
 353 collective works based on the Program.
 354
 355 <P>In addition, mere aggregation of another work not based on the Program
 356 with the Program (or with a work based on the Program) on a volume of
 357 a storage or distribution medium does not bring the other work under
 358 the scope of this License.
 359
 360 <LI>You may copy and distribute the Program (or a work based on it,
 361 under Section 2) in object code or executable form under the terms of
 362 Sections 1 and 2 above provided that you also do one of the following:
 363
 364 <OL TYPE="a">
 365
 366 <LI>Accompany it with the complete corresponding machine-readable
 367 source code, which must be distributed under the terms of Sections
 368 1 and 2 above on a medium customarily used for software interchange; or,
 369
 370 <LI>Accompany it with a written offer, valid for at least three
 371 years, to give any third party, for a charge no more than your
 372 cost of physically performing source distribution, a complete
 373 machine-readable copy of the corresponding source code, to be
 374 distributed under the terms of Sections 1 and 2 above on a medium
 375 customarily used for software interchange; or,
 376
 377 <LI>Accompany it with the information you received as to the offer
 378 to distribute corresponding source code.  (This alternative is
 379 allowed only for noncommercial distribution and only if you
 380 received the program in object code or executable form with such
 381 an offer, in accord with Subsection b above.)
 382
 383 </OL>
 384
 385 <P>The source code for a work means the preferred form of the work for
 386 making modifications to it.  For an executable work, complete source
 387 code means all the source code for all modules it contains, plus any
 388 associated interface definition files, plus the scripts used to
 389 control compilation and installation of the executable.  However, as a
 390 special exception, the source code distributed need not include
 391 anything that is normally distributed (in either source or binary
 392 form) with the major components (compiler, kernel, and so on) of the
 393 operating system on which the executable runs, unless that component
 394 itself accompanies the executable.
 395
 396 <P>If distribution of executable or object code is made by offering
 397 access to copy from a designated place, then offering equivalent
 398 access to copy the source code from the same place counts as
 399 distribution of the source code, even though third parties are not
 400 compelled to copy the source along with the object code.
 401
 402 <LI>You may not copy, modify, sublicense, or distribute the Program
 403 except as expressly provided under this License.  Any attempt
 404 otherwise to copy, modify, sublicense or distribute the Program is
 405 void, and will automatically terminate your rights under this License.
 406 However, parties who have received copies, or rights, from you under
 407 this License will not have their licenses terminated so long as such
 408 parties remain in full compliance.
 409
 410 <LI>You are not required to accept this License, since you have not
 411 signed it.  However, nothing else grants you permission to modify or
 412 distribute the Program or its derivative works.  These actions are
 413 prohibited by law if you do not accept this License.  Therefore, by
 414 modifying or distributing the Program (or any work based on the
 415 Program), you indicate your acceptance of this License to do so, and
 416 all its terms and conditions for copying, distributing or modifying
 417 the Program or works based on it.
 418
 419 <LI>Each time you redistribute the Program (or any work based on the
 420 Program), the recipient automatically receives a license from the
 421 original licensor to copy, distribute or modify the Program subject to
 422 these terms and conditions.  You may not impose any further
 423 restrictions on the recipients' exercise of the rights granted herein.
 424 You are not responsible for enforcing compliance by third parties to
 425 this License.
 426
 427 <LI>If, as a consequence of a court judgment or allegation of patent
 428 infringement or for any other reason (not limited to patent issues),
 429 conditions are imposed on you (whether by court order, agreement or
 430 otherwise) that contradict the conditions of this License, they do not
 431 excuse you from the conditions of this License.  If you cannot
 432 distribute so as to satisfy simultaneously your obligations under this
 433 License and any other pertinent obligations, then as a consequence you
 434 may not distribute the Program at all.  For example, if a patent
 435 license would not permit royalty-free redistribution of the Program by
 436 all those who receive copies directly or indirectly through you, then
 437 the only way you could satisfy both it and this License would be to
 438 refrain entirely from distribution of the Program.
 439
 440 <P>If any portion of this section is held invalid or unenforceable under
 441 any particular circumstance, the balance of the section is intended to
 442 apply and the section as a whole is intended to apply in other
 443 circumstances.
 444
 445 <P>It is not the purpose of this section to induce you to infringe any
 446 patents or other property right claims or to contest validity of any
 447 such claims; this section has the sole purpose of protecting the
 448 integrity of the free software distribution system, which is
 449 implemented by public license practices.  Many people have made
 450 generous contributions to the wide range of software distributed
 451 through that system in reliance on consistent application of that
 452 system; it is up to the author/donor to decide if he or she is willing
 453 to distribute software through any other system and a licensee cannot
 454 impose that choice.
 455
 456 <P>This section is intended to make thoroughly clear what is believed to
 457 be a consequence of the rest of this License.
 458
 459 <LI>If the distribution and/or use of the Program is restricted in
 460 certain countries either by patents or by copyrighted interfaces, the
 461 original copyright holder who places the Program under this License
 462 may add an explicit geographical distribution limitation excluding
 463 those countries, so that distribution is permitted only in or among
 464 countries not thus excluded.  In such case, this License incorporates
 465 the limitation as if written in the body of this License.
 466
 467 <LI>The Free Software Foundation may publish revised and/or new versions
 468 of the General Public License from time to time.  Such new versions will
 469 be similar in spirit to the present version, but may differ in detail to
 470 address new problems or concerns.
 471
 472 <P>Each version is given a distinguishing version number.  If the Program
 473 specifies a version number of this License which applies to it and "any
 474 later version", you have the option of following the terms and conditions
 475 either of that version or of any later version published by the Free
 476 Software Foundation.  If the Program does not specify a version number of
 477 this License, you may choose any version ever published by the Free Software
 478 Foundation.
 479
 480 <LI>If you wish to incorporate parts of the Program into other free
 481 programs whose distribution conditions are different, write to the author
 482 to ask for permission.  For software which is copyrighted by the Free
 483 Software Foundation, write to the Free Software Foundation; we sometimes
 484 make exceptions for this.  Our decision will be guided by the two goals
 485 of preserving the free status of all derivatives of our free software and
 486 of promoting the sharing and reuse of software generally.
 487
 488 </OL>
 489
 490 <H3>NO WARRANTY</H3>
 491
 492 <OL START="11">
 493
 494 <LI>BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 495 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
 496 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
 497 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
 498 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 499 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
 500 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
 501 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
 502 REPAIR OR CORRECTION.
 503
 504 <LI>IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 505 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 506 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 507 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
 508 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
 509 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
 510 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 511 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 512 POSSIBILITY OF SUCH DAMAGES.
 513
 514 </OL>
 515
 516 <H3>END OF TERMS AND CONDITIONS</H3>
 517
 518 <H3>How to Apply These Terms to Your New Programs</H3>
 519
 520 <P>If you develop a new program, and you want it to be of the greatest
 521 possible use to the public, the best way to achieve this is to make it
 522 free software which everyone can redistribute and change under these terms.
 523
 524 <P>To do so, attach the following notices to the program.  It is safest
 525 to attach them to the start of each source file to most effectively
 526 convey the exclusion of warranty; and each file should have at least
 527 the "copyright" line and a pointer to where the full notice is found.
 528
 529 <PRE>
 530 <VAR>one line to give the program's name and an idea of what it does.</VAR>
 531 Copyright (C) <VAR>yyyy</VAR>  <VAR>name of author</VAR>
 532
 533 This program is free software; you can redistribute it and/or
 534 modify it under the terms of the GNU General Public License
 535 as published by the Free Software Foundation; either version 2
 536 of the License, or (at your option) any later version.
 537
 538 This program is distributed in the hope that it will be useful,
 539 but WITHOUT ANY WARRANTY; without even the implied warranty of
 540 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 541 GNU General Public License for more details.
 542
 543 You should have received a copy of the GNU General Public License
 544 along with this program; if not, write to the Free Software
 545 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 546 </PRE>
 547
 548 <P>Also add information on how to contact you by electronic and paper mail.
 549
 550 <P>If the program is interactive, make it output a short notice like this
 551 when it starts in an interactive mode:
 552
 553 <PRE>
 554 Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>
 555 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details
 556 type `show w'.  This is free software, and you are welcome
 557 to redistribute it under certain conditions; type `show c'
 558 for details.
 559 </PRE>
 560
 561 <P>The hypothetical commands <SAMP>`show w'</SAMP> and <SAMP>`show c'</SAMP> should show
 562 the appropriate parts of the General Public License.  Of course, the
 563 commands you use may be called something other than <SAMP>`show w'</SAMP> and
 564 <SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever
 565 suits your program.
 566
 567 <P>You should also get your employer (if you work as a programmer) or your
 568 school, if any, to sign a "copyright disclaimer" for the program, if
 569 necessary.  Here is a sample; alter the names:
 570
 571 <PRE>
 572 Yoyodyne, Inc., hereby disclaims all copyright
 573 interest in the program `Gnomovision'
 574 (which makes passes at compilers) written
 575 by James Hacker.
 576
 577 <VAR>signature of Ty Coon</VAR>, 1 April 1989
 578 Ty Coon, President of Vice
 579 </PRE>
 580
 581 <H2 CLASS="title"><A NAME="LGPL">GNU LIBRARY GENERAL PUBLIC LICENSE</A></H2>
 582
 583 <P>Version 2, June 1991
 584
 585 <PRE>
 586 Copyright (C) 1991 Free Software Foundation, Inc.
 587 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
 588 Everyone is permitted to copy and distribute verbatim copies
 589 of this license document, but changing it is not allowed.
 590
 591 [This is the first released version of the library GPL.  It is
 592  numbered 2 because it goes with version 2 of the ordinary GPL.]
 593 </PRE>
 594
 595 <H3>Preamble</H3>
 596
 597 <P>The licenses for most software are designed to take away your
 598 freedom to share and change it.  By contrast, the GNU General Public
 599 Licenses are intended to guarantee your freedom to share and change
 600 free software--to make sure the software is free for all its users.
 601
 602 <P>This license, the Library General Public License, applies to some
 603 specially designated Free Software Foundation software, and to any
 604 other libraries whose authors decide to use it.  You can use it for
 605 your libraries, too.
 606
 607 <P>When we speak of free software, we are referring to freedom, not
 608 price.  Our General Public Licenses are designed to make sure that you
 609 have the freedom to distribute copies of free software (and charge for
 610 this service if you wish), that you receive source code or can get it
 611 if you want it, that you can change the software or use pieces of it
 612 in new free programs; and that you know you can do these things.
 613
 614 <P>To protect your rights, we need to make restrictions that forbid
 615 anyone to deny you these rights or to ask you to surrender the rights.
 616 These restrictions translate to certain responsibilities for you if
 617 you distribute copies of the library, or if you modify it.
 618
 619 <P>For example, if you distribute copies of the library, whether gratis
 620 or for a fee, you must give the recipients all the rights that we gave
 621 you.  You must make sure that they, too, receive or can get the source
 622 code.  If you link a program with the library, you must provide
 623 complete object files to the recipients so that they can relink them
 624 with the library, after making changes to the library and recompiling
 625 it.  And you must show them these terms so they know their rights.
 626
 627 <P>Our method of protecting your rights has two steps: (1) copyright
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1099
1100 <VAR>signature of Ty Coon</VAR>, 1 April 1990
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