LICENSE.txt

   1                 Common UNIX Printing System License Agreement
   2
   3                 Copyright 1997-2002 by Easy Software Products
   4                         44141 AIRPORT VIEW DR STE 204
   5                      HOLLYWOOD, MARYLAND 20636-3111 USA
   6
   7                            Voice: +1.301.373.9600
   8                           Email: cups-info@cups.org
   9                           WWW: http://www.cups.org
  10
  11
  12 INTRODUCTION
  13
  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:
  29
  30    - Use the CUPS software at no charge.
  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.
 105
 106
 107 TRADEMARKS
 108
 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.
 116
 117
 118 BINARY DISTRIBUTION RIGHTS
 119
 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.
 125
 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:
 129
 130      Derek B. Noonburg
 131      Email: derekn@foolabs.com
 132      WWW: http://www.foolabs.com/xpdf/
 133
 134
 135 SUPPORT
 136
 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:
 140
 141      http://www.easysw.com/
 142 \f
 143                     GNU GENERAL PUBLIC LICENSE
 144                        Version 2, June 1991
 145
 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.
 150
 151                             Preamble
 152
 153   The licenses for most software are designed to take away your
 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
 163   When we speak of free software, we are referring to freedom, not
 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
 170   To protect your rights, we need to make restrictions that forbid
 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
 175   For example, if you distribute copies of such a program, whether
 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
 181   We protect your rights with two steps: (1) copyright the software, and
 182 (2) offer you this license which gives you legal permission to copy,
 183 distribute and/or modify the software.
 184
 185   Also, for each author's protection and ours, we want to make certain
 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
 192   Finally, any free program is threatened constantly by software
 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
 198   The precise terms and conditions for copying, distribution and
 199 modification follow.
 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
 222 source code as you receive it, in any medium, provided that you
 223 conspicuously and appropriately publish on each copy an appropriate
 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
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 245     c) If the modified program normally reads commands interactively
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 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:
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 280     a) Accompany it with the complete corresponding machine-readable
 281     source code, which must be distributed under the terms of Sections
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 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
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 288     distributed under the terms of Sections 1 and 2 above on a medium
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 291     c) Accompany it with the information you received as to the offer
 292     to distribute corresponding source code.  (This alternative is
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 295     an offer, in accord with Subsection b above.)
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 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
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 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
 337 this License.
 338
 339   7. If, as a consequence of a court judgment or allegation of patent
 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
 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
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 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
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 365 to distribute software through any other system and a licensee cannot
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 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
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 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.
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 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
 381 be similar in spirit to the present version, but may differ in detail to
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 384 Each version is given a distinguishing version number.  If the Program
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 391
 392   10. If you wish to incorporate parts of the Program into other free
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 396 make exceptions for this.  Our decision will be guided by the two goals
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 400                             NO WARRANTY
 401
 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
 404 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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 412   12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 413 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 414 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 415 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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 421
 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
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 523   Note that it is possible for a library to be covered by the ordinary
 524 General Public License rather than by this special one.
 525 \f
 526                   GNU LIBRARY GENERAL PUBLIC LICENSE
 527    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 528
 529   0. This License Agreement applies to any software library which
 530 contains a notice placed by the copyright holder or other authorized
 531 party saying it may be distributed under the terms of this Library
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