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jpayne@1 1 GNU GENERAL PUBLIC LICENSE
jpayne@1 2 Version 2, June 1991
jpayne@1 3
jpayne@1 4 Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
jpayne@1 5 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
jpayne@1 6 Everyone is permitted to copy and distribute verbatim copies
jpayne@1 7 of this license document, but changing it is not allowed.
jpayne@1 8
jpayne@1 9 Preamble
jpayne@1 10
jpayne@1 11 The licenses for most software are designed to take away your
jpayne@1 12 freedom to share and change it. By contrast, the GNU General Public
jpayne@1 13 License is intended to guarantee your freedom to share and change free
jpayne@1 14 software--to make sure the software is free for all its users. This
jpayne@1 15 General Public License applies to most of the Free Software
jpayne@1 16 Foundation's software and to any other program whose authors commit to
jpayne@1 17 using it. (Some other Free Software Foundation software is covered by
jpayne@1 18 the GNU Lesser General Public License instead.) You can apply it to
jpayne@1 19 your programs, too.
jpayne@1 20
jpayne@1 21 When we speak of free software, we are referring to freedom, not
jpayne@1 22 price. Our General Public Licenses are designed to make sure that you
jpayne@1 23 have the freedom to distribute copies of free software (and charge for
jpayne@1 24 this service if you wish), that you receive source code or can get it
jpayne@1 25 if you want it, that you can change the software or use pieces of it
jpayne@1 26 in new free programs; and that you know you can do these things.
jpayne@1 27
jpayne@1 28 To protect your rights, we need to make restrictions that forbid
jpayne@1 29 anyone to deny you these rights or to ask you to surrender the rights.
jpayne@1 30 These restrictions translate to certain responsibilities for you if you
jpayne@1 31 distribute copies of the software, or if you modify it.
jpayne@1 32
jpayne@1 33 For example, if you distribute copies of such a program, whether
jpayne@1 34 gratis or for a fee, you must give the recipients all the rights that
jpayne@1 35 you have. You must make sure that they, too, receive or can get the
jpayne@1 36 source code. And you must show them these terms so they know their
jpayne@1 37 rights.
jpayne@1 38
jpayne@1 39 We protect your rights with two steps: (1) copyright the software, and
jpayne@1 40 (2) offer you this license which gives you legal permission to copy,
jpayne@1 41 distribute and/or modify the software.
jpayne@1 42
jpayne@1 43 Also, for each author's protection and ours, we want to make certain
jpayne@1 44 that everyone understands that there is no warranty for this free
jpayne@1 45 software. If the software is modified by someone else and passed on, we
jpayne@1 46 want its recipients to know that what they have is not the original, so
jpayne@1 47 that any problems introduced by others will not reflect on the original
jpayne@1 48 authors' reputations.
jpayne@1 49
jpayne@1 50 Finally, any free program is threatened constantly by software
jpayne@1 51 patents. We wish to avoid the danger that redistributors of a free
jpayne@1 52 program will individually obtain patent licenses, in effect making the
jpayne@1 53 program proprietary. To prevent this, we have made it clear that any
jpayne@1 54 patent must be licensed for everyone's free use or not licensed at all.
jpayne@1 55
jpayne@1 56 The precise terms and conditions for copying, distribution and
jpayne@1 57 modification follow.
jpayne@1 58
jpayne@1 59 GNU GENERAL PUBLIC LICENSE
jpayne@1 60 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
jpayne@1 61
jpayne@1 62 0. This License applies to any program or other work which contains
jpayne@1 63 a notice placed by the copyright holder saying it may be distributed
jpayne@1 64 under the terms of this General Public License. The "Program", below,
jpayne@1 65 refers to any such program or work, and a "work based on the Program"
jpayne@1 66 means either the Program or any derivative work under copyright law:
jpayne@1 67 that is to say, a work containing the Program or a portion of it,
jpayne@1 68 either verbatim or with modifications and/or translated into another
jpayne@1 69 language. (Hereinafter, translation is included without limitation in
jpayne@1 70 the term "modification".) Each licensee is addressed as "you".
jpayne@1 71
jpayne@1 72 Activities other than copying, distribution and modification are not
jpayne@1 73 covered by this License; they are outside its scope. The act of
jpayne@1 74 running the Program is not restricted, and the output from the Program
jpayne@1 75 is covered only if its contents constitute a work based on the
jpayne@1 76 Program (independent of having been made by running the Program).
jpayne@1 77 Whether that is true depends on what the Program does.
jpayne@1 78
jpayne@1 79 1. You may copy and distribute verbatim copies of the Program's
jpayne@1 80 source code as you receive it, in any medium, provided that you
jpayne@1 81 conspicuously and appropriately publish on each copy an appropriate
jpayne@1 82 copyright notice and disclaimer of warranty; keep intact all the
jpayne@1 83 notices that refer to this License and to the absence of any warranty;
jpayne@1 84 and give any other recipients of the Program a copy of this License
jpayne@1 85 along with the Program.
jpayne@1 86
jpayne@1 87 You may charge a fee for the physical act of transferring a copy, and
jpayne@1 88 you may at your option offer warranty protection in exchange for a fee.
jpayne@1 89
jpayne@1 90 2. You may modify your copy or copies of the Program or any portion
jpayne@1 91 of it, thus forming a work based on the Program, and copy and
jpayne@1 92 distribute such modifications or work under the terms of Section 1
jpayne@1 93 above, provided that you also meet all of these conditions:
jpayne@1 94
jpayne@1 95 a) You must cause the modified files to carry prominent notices
jpayne@1 96 stating that you changed the files and the date of any change.
jpayne@1 97
jpayne@1 98 b) You must cause any work that you distribute or publish, that in
jpayne@1 99 whole or in part contains or is derived from the Program or any
jpayne@1 100 part thereof, to be licensed as a whole at no charge to all third
jpayne@1 101 parties under the terms of this License.
jpayne@1 102
jpayne@1 103 c) If the modified program normally reads commands interactively
jpayne@1 104 when run, you must cause it, when started running for such
jpayne@1 105 interactive use in the most ordinary way, to print or display an
jpayne@1 106 announcement including an appropriate copyright notice and a
jpayne@1 107 notice that there is no warranty (or else, saying that you provide
jpayne@1 108 a warranty) and that users may redistribute the program under
jpayne@1 109 these conditions, and telling the user how to view a copy of this
jpayne@1 110 License. (Exception: if the Program itself is interactive but
jpayne@1 111 does not normally print such an announcement, your work based on
jpayne@1 112 the Program is not required to print an announcement.)
jpayne@1 113
jpayne@1 114 These requirements apply to the modified work as a whole. If
jpayne@1 115 identifiable sections of that work are not derived from the Program,
jpayne@1 116 and can be reasonably considered independent and separate works in
jpayne@1 117 themselves, then this License, and its terms, do not apply to those
jpayne@1 118 sections when you distribute them as separate works. But when you
jpayne@1 119 distribute the same sections as part of a whole which is a work based
jpayne@1 120 on the Program, the distribution of the whole must be on the terms of
jpayne@1 121 this License, whose permissions for other licensees extend to the
jpayne@1 122 entire whole, and thus to each and every part regardless of who wrote it.
jpayne@1 123
jpayne@1 124 Thus, it is not the intent of this section to claim rights or contest
jpayne@1 125 your rights to work written entirely by you; rather, the intent is to
jpayne@1 126 exercise the right to control the distribution of derivative or
jpayne@1 127 collective works based on the Program.
jpayne@1 128
jpayne@1 129 In addition, mere aggregation of another work not based on the Program
jpayne@1 130 with the Program (or with a work based on the Program) on a volume of
jpayne@1 131 a storage or distribution medium does not bring the other work under
jpayne@1 132 the scope of this License.
jpayne@1 133
jpayne@1 134 3. You may copy and distribute the Program (or a work based on it,
jpayne@1 135 under Section 2) in object code or executable form under the terms of
jpayne@1 136 Sections 1 and 2 above provided that you also do one of the following:
jpayne@1 137
jpayne@1 138 a) Accompany it with the complete corresponding machine-readable
jpayne@1 139 source code, which must be distributed under the terms of Sections
jpayne@1 140 1 and 2 above on a medium customarily used for software interchange; or,
jpayne@1 141
jpayne@1 142 b) Accompany it with a written offer, valid for at least three
jpayne@1 143 years, to give any third party, for a charge no more than your
jpayne@1 144 cost of physically performing source distribution, a complete
jpayne@1 145 machine-readable copy of the corresponding source code, to be
jpayne@1 146 distributed under the terms of Sections 1 and 2 above on a medium
jpayne@1 147 customarily used for software interchange; or,
jpayne@1 148
jpayne@1 149 c) Accompany it with the information you received as to the offer
jpayne@1 150 to distribute corresponding source code. (This alternative is
jpayne@1 151 allowed only for noncommercial distribution and only if you
jpayne@1 152 received the program in object code or executable form with such
jpayne@1 153 an offer, in accord with Subsection b above.)
jpayne@1 154
jpayne@1 155 The source code for a work means the preferred form of the work for
jpayne@1 156 making modifications to it. For an executable work, complete source
jpayne@1 157 code means all the source code for all modules it contains, plus any
jpayne@1 158 associated interface definition files, plus the scripts used to
jpayne@1 159 control compilation and installation of the executable. However, as a
jpayne@1 160 special exception, the source code distributed need not include
jpayne@1 161 anything that is normally distributed (in either source or binary
jpayne@1 162 form) with the major components (compiler, kernel, and so on) of the
jpayne@1 163 operating system on which the executable runs, unless that component
jpayne@1 164 itself accompanies the executable.
jpayne@1 165
jpayne@1 166 If distribution of executable or object code is made by offering
jpayne@1 167 access to copy from a designated place, then offering equivalent
jpayne@1 168 access to copy the source code from the same place counts as
jpayne@1 169 distribution of the source code, even though third parties are not
jpayne@1 170 compelled to copy the source along with the object code.
jpayne@1 171
jpayne@1 172 4. You may not copy, modify, sublicense, or distribute the Program
jpayne@1 173 except as expressly provided under this License. Any attempt
jpayne@1 174 otherwise to copy, modify, sublicense or distribute the Program is
jpayne@1 175 void, and will automatically terminate your rights under this License.
jpayne@1 176 However, parties who have received copies, or rights, from you under
jpayne@1 177 this License will not have their licenses terminated so long as such
jpayne@1 178 parties remain in full compliance.
jpayne@1 179
jpayne@1 180 5. You are not required to accept this License, since you have not
jpayne@1 181 signed it. However, nothing else grants you permission to modify or
jpayne@1 182 distribute the Program or its derivative works. These actions are
jpayne@1 183 prohibited by law if you do not accept this License. Therefore, by
jpayne@1 184 modifying or distributing the Program (or any work based on the
jpayne@1 185 Program), you indicate your acceptance of this License to do so, and
jpayne@1 186 all its terms and conditions for copying, distributing or modifying
jpayne@1 187 the Program or works based on it.
jpayne@1 188
jpayne@1 189 6. Each time you redistribute the Program (or any work based on the
jpayne@1 190 Program), the recipient automatically receives a license from the
jpayne@1 191 original licensor to copy, distribute or modify the Program subject to
jpayne@1 192 these terms and conditions. You may not impose any further
jpayne@1 193 restrictions on the recipients' exercise of the rights granted herein.
jpayne@1 194 You are not responsible for enforcing compliance by third parties to
jpayne@1 195 this License.
jpayne@1 196
jpayne@1 197 7. If, as a consequence of a court judgment or allegation of patent
jpayne@1 198 infringement or for any other reason (not limited to patent issues),
jpayne@1 199 conditions are imposed on you (whether by court order, agreement or
jpayne@1 200 otherwise) that contradict the conditions of this License, they do not
jpayne@1 201 excuse you from the conditions of this License. If you cannot
jpayne@1 202 distribute so as to satisfy simultaneously your obligations under this
jpayne@1 203 License and any other pertinent obligations, then as a consequence you
jpayne@1 204 may not distribute the Program at all. For example, if a patent
jpayne@1 205 license would not permit royalty-free redistribution of the Program by
jpayne@1 206 all those who receive copies directly or indirectly through you, then
jpayne@1 207 the only way you could satisfy both it and this License would be to
jpayne@1 208 refrain entirely from distribution of the Program.
jpayne@1 209
jpayne@1 210 If any portion of this section is held invalid or unenforceable under
jpayne@1 211 any particular circumstance, the balance of the section is intended to
jpayne@1 212 apply and the section as a whole is intended to apply in other
jpayne@1 213 circumstances.
jpayne@1 214
jpayne@1 215 It is not the purpose of this section to induce you to infringe any
jpayne@1 216 patents or other property right claims or to contest validity of any
jpayne@1 217 such claims; this section has the sole purpose of protecting the
jpayne@1 218 integrity of the free software distribution system, which is
jpayne@1 219 implemented by public license practices. Many people have made
jpayne@1 220 generous contributions to the wide range of software distributed
jpayne@1 221 through that system in reliance on consistent application of that
jpayne@1 222 system; it is up to the author/donor to decide if he or she is willing
jpayne@1 223 to distribute software through any other system and a licensee cannot
jpayne@1 224 impose that choice.
jpayne@1 225
jpayne@1 226 This section is intended to make thoroughly clear what is believed to
jpayne@1 227 be a consequence of the rest of this License.
jpayne@1 228
jpayne@1 229 8. If the distribution and/or use of the Program is restricted in
jpayne@1 230 certain countries either by patents or by copyrighted interfaces, the
jpayne@1 231 original copyright holder who places the Program under this License
jpayne@1 232 may add an explicit geographical distribution limitation excluding
jpayne@1 233 those countries, so that distribution is permitted only in or among
jpayne@1 234 countries not thus excluded. In such case, this License incorporates
jpayne@1 235 the limitation as if written in the body of this License.
jpayne@1 236
jpayne@1 237 9. The Free Software Foundation may publish revised and/or new versions
jpayne@1 238 of the General Public License from time to time. Such new versions will
jpayne@1 239 be similar in spirit to the present version, but may differ in detail to
jpayne@1 240 address new problems or concerns.
jpayne@1 241
jpayne@1 242 Each version is given a distinguishing version number. If the Program
jpayne@1 243 specifies a version number of this License which applies to it and "any
jpayne@1 244 later version", you have the option of following the terms and conditions
jpayne@1 245 either of that version or of any later version published by the Free
jpayne@1 246 Software Foundation. If the Program does not specify a version number of
jpayne@1 247 this License, you may choose any version ever published by the Free Software
jpayne@1 248 Foundation.
jpayne@1 249
jpayne@1 250 10. If you wish to incorporate parts of the Program into other free
jpayne@1 251 programs whose distribution conditions are different, write to the author
jpayne@1 252 to ask for permission. For software which is copyrighted by the Free
jpayne@1 253 Software Foundation, write to the Free Software Foundation; we sometimes
jpayne@1 254 make exceptions for this. Our decision will be guided by the two goals
jpayne@1 255 of preserving the free status of all derivatives of our free software and
jpayne@1 256 of promoting the sharing and reuse of software generally.
jpayne@1 257
jpayne@1 258 NO WARRANTY
jpayne@1 259
jpayne@1 260 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
jpayne@1 261 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
jpayne@1 262 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
jpayne@1 263 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
jpayne@1 264 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
jpayne@1 265 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
jpayne@1 266 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
jpayne@1 267 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
jpayne@1 268 REPAIR OR CORRECTION.
jpayne@1 269
jpayne@1 270 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
jpayne@1 271 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
jpayne@1 272 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
jpayne@1 273 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
jpayne@1 274 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
jpayne@1 275 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
jpayne@1 276 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
jpayne@1 277 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
jpayne@1 278 POSSIBILITY OF SUCH DAMAGES.
jpayne@1 279
jpayne@1 280 END OF TERMS AND CONDITIONS
jpayne@1 281
jpayne@1 282 How to Apply These Terms to Your New Programs
jpayne@1 283
jpayne@1 284 If you develop a new program, and you want it to be of the greatest
jpayne@1 285 possible use to the public, the best way to achieve this is to make it
jpayne@1 286 free software which everyone can redistribute and change under these terms.
jpayne@1 287
jpayne@1 288 To do so, attach the following notices to the program. It is safest
jpayne@1 289 to attach them to the start of each source file to most effectively
jpayne@1 290 convey the exclusion of warranty; and each file should have at least
jpayne@1 291 the "copyright" line and a pointer to where the full notice is found.
jpayne@1 292
jpayne@1 293 {description}
jpayne@1 294 Copyright (C) {year} {fullname}
jpayne@1 295
jpayne@1 296 This program is free software; you can redistribute it and/or modify
jpayne@1 297 it under the terms of the GNU General Public License as published by
jpayne@1 298 the Free Software Foundation; either version 2 of the License, or
jpayne@1 299 (at your option) any later version.
jpayne@1 300
jpayne@1 301 This program is distributed in the hope that it will be useful,
jpayne@1 302 but WITHOUT ANY WARRANTY; without even the implied warranty of
jpayne@1 303 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
jpayne@1 304 GNU General Public License for more details.
jpayne@1 305
jpayne@1 306 You should have received a copy of the GNU General Public License along
jpayne@1 307 with this program; if not, write to the Free Software Foundation, Inc.,
jpayne@1 308 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
jpayne@1 309
jpayne@1 310 Also add information on how to contact you by electronic and paper mail.
jpayne@1 311
jpayne@1 312 If the program is interactive, make it output a short notice like this
jpayne@1 313 when it starts in an interactive mode:
jpayne@1 314
jpayne@1 315 Gnomovision version 69, Copyright (C) year name of author
jpayne@1 316 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
jpayne@1 317 This is free software, and you are welcome to redistribute it
jpayne@1 318 under certain conditions; type `show c' for details.
jpayne@1 319
jpayne@1 320 The hypothetical commands `show w' and `show c' should show the appropriate
jpayne@1 321 parts of the General Public License. Of course, the commands you use may
jpayne@1 322 be called something other than `show w' and `show c'; they could even be
jpayne@1 323 mouse-clicks or menu items--whatever suits your program.
jpayne@1 324
jpayne@1 325 You should also get your employer (if you work as a programmer) or your
jpayne@1 326 school, if any, to sign a "copyright disclaimer" for the program, if
jpayne@1 327 necessary. Here is a sample; alter the names:
jpayne@1 328
jpayne@1 329 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
jpayne@1 330 `Gnomovision' (which makes passes at compilers) written by James Hacker.
jpayne@1 331
jpayne@1 332 {signature of Ty Coon}, 1 April 1989
jpayne@1 333 Ty Coon, President of Vice
jpayne@1 334
jpayne@1 335 This General Public License does not permit incorporating your program into
jpayne@1 336 proprietary programs. If your program is a subroutine library, you may
jpayne@1 337 consider it more useful to permit linking proprietary applications with the
jpayne@1 338 library. If this is what you want to do, use the GNU Lesser General
jpayne@1 339 Public License instead of this License.