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3.4 + GNU GENERAL PUBLIC LICENSE
3.5 + Version 2, June 1991
3.6 +
3.7 + Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
3.8 + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
3.9 + Everyone is permitted to copy and distribute verbatim copies
3.10 + of this license document, but changing it is not allowed.
3.11 +
3.12 + Preamble
3.13 +
3.14 + The licenses for most software are designed to take away your
3.15 +freedom to share and change it. By contrast, the GNU General Public
3.16 +License is intended to guarantee your freedom to share and change free
3.17 +software--to make sure the software is free for all its users. This
3.18 +General Public License applies to most of the Free Software
3.19 +Foundation's software and to any other program whose authors commit to
3.20 +using it. (Some other Free Software Foundation software is covered by
3.21 +the GNU Lesser General Public License instead.) You can apply it to
3.22 +your programs, too.
3.23 +
3.24 + When we speak of free software, we are referring to freedom, not
3.25 +price. Our General Public Licenses are designed to make sure that you
3.26 +have the freedom to distribute copies of free software (and charge for
3.27 +this service if you wish), that you receive source code or can get it
3.28 +if you want it, that you can change the software or use pieces of it
3.29 +in new free programs; and that you know you can do these things.
3.30 +
3.31 + To protect your rights, we need to make restrictions that forbid
3.32 +anyone to deny you these rights or to ask you to surrender the rights.
3.33 +These restrictions translate to certain responsibilities for you if you
3.34 +distribute copies of the software, or if you modify it.
3.35 +
3.36 + For example, if you distribute copies of such a program, whether
3.37 +gratis or for a fee, you must give the recipients all the rights that
3.38 +you have. You must make sure that they, too, receive or can get the
3.39 +source code. And you must show them these terms so they know their
3.40 +rights.
3.41 +
3.42 + We protect your rights with two steps: (1) copyright the software, and
3.43 +(2) offer you this license which gives you legal permission to copy,
3.44 +distribute and/or modify the software.
3.45 +
3.46 + Also, for each author's protection and ours, we want to make certain
3.47 +that everyone understands that there is no warranty for this free
3.48 +software. If the software is modified by someone else and passed on, we
3.49 +want its recipients to know that what they have is not the original, so
3.50 +that any problems introduced by others will not reflect on the original
3.51 +authors' reputations.
3.52 +
3.53 + Finally, any free program is threatened constantly by software
3.54 +patents. We wish to avoid the danger that redistributors of a free
3.55 +program will individually obtain patent licenses, in effect making the
3.56 +program proprietary. To prevent this, we have made it clear that any
3.57 +patent must be licensed for everyone's free use or not licensed at all.
3.58 +
3.59 + The precise terms and conditions for copying, distribution and
3.60 +modification follow.
3.61 +
3.62 + GNU GENERAL PUBLIC LICENSE
3.63 + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
3.64 +
3.65 + 0. This License applies to any program or other work which contains
3.66 +a notice placed by the copyright holder saying it may be distributed
3.67 +under the terms of this General Public License. The "Program", below,
3.68 +refers to any such program or work, and a "work based on the Program"
3.69 +means either the Program or any derivative work under copyright law:
3.70 +that is to say, a work containing the Program or a portion of it,
3.71 +either verbatim or with modifications and/or translated into another
3.72 +language. (Hereinafter, translation is included without limitation in
3.73 +the term "modification".) Each licensee is addressed as "you".
3.74 +
3.75 +Activities other than copying, distribution and modification are not
3.76 +covered by this License; they are outside its scope. The act of
3.77 +running the Program is not restricted, and the output from the Program
3.78 +is covered only if its contents constitute a work based on the
3.79 +Program (independent of having been made by running the Program).
3.80 +Whether that is true depends on what the Program does.
3.81 +
3.82 + 1. You may copy and distribute verbatim copies of the Program's
3.83 +source code as you receive it, in any medium, provided that you
3.84 +conspicuously and appropriately publish on each copy an appropriate
3.85 +copyright notice and disclaimer of warranty; keep intact all the
3.86 +notices that refer to this License and to the absence of any warranty;
3.87 +and give any other recipients of the Program a copy of this License
3.88 +along with the Program.
3.89 +
3.90 +You may charge a fee for the physical act of transferring a copy, and
3.91 +you may at your option offer warranty protection in exchange for a fee.
3.92 +
3.93 + 2. You may modify your copy or copies of the Program or any portion
3.94 +of it, thus forming a work based on the Program, and copy and
3.95 +distribute such modifications or work under the terms of Section 1
3.96 +above, provided that you also meet all of these conditions:
3.97 +
3.98 + a) You must cause the modified files to carry prominent notices
3.99 + stating that you changed the files and the date of any change.
3.100 +
3.101 + b) You must cause any work that you distribute or publish, that in
3.102 + whole or in part contains or is derived from the Program or any
3.103 + part thereof, to be licensed as a whole at no charge to all third
3.104 + parties under the terms of this License.
3.105 +
3.106 + c) If the modified program normally reads commands interactively
3.107 + when run, you must cause it, when started running for such
3.108 + interactive use in the most ordinary way, to print or display an
3.109 + announcement including an appropriate copyright notice and a
3.110 + notice that there is no warranty (or else, saying that you provide
3.111 + a warranty) and that users may redistribute the program under
3.112 + these conditions, and telling the user how to view a copy of this
3.113 + License. (Exception: if the Program itself is interactive but
3.114 + does not normally print such an announcement, your work based on
3.115 + the Program is not required to print an announcement.)
3.116 +
3.117 +These requirements apply to the modified work as a whole. If
3.118 +identifiable sections of that work are not derived from the Program,
3.119 +and can be reasonably considered independent and separate works in
3.120 +themselves, then this License, and its terms, do not apply to those
3.121 +sections when you distribute them as separate works. But when you
3.122 +distribute the same sections as part of a whole which is a work based
3.123 +on the Program, the distribution of the whole must be on the terms of
3.124 +this License, whose permissions for other licensees extend to the
3.125 +entire whole, and thus to each and every part regardless of who wrote it.
3.126 +
3.127 +Thus, it is not the intent of this section to claim rights or contest
3.128 +your rights to work written entirely by you; rather, the intent is to
3.129 +exercise the right to control the distribution of derivative or
3.130 +collective works based on the Program.
3.131 +
3.132 +In addition, mere aggregation of another work not based on the Program
3.133 +with the Program (or with a work based on the Program) on a volume of
3.134 +a storage or distribution medium does not bring the other work under
3.135 +the scope of this License.
3.136 +
3.137 + 3. You may copy and distribute the Program (or a work based on it,
3.138 +under Section 2) in object code or executable form under the terms of
3.139 +Sections 1 and 2 above provided that you also do one of the following:
3.140 +
3.141 + a) Accompany it with the complete corresponding machine-readable
3.142 + source code, which must be distributed under the terms of Sections
3.143 + 1 and 2 above on a medium customarily used for software interchange; or,
3.144 +
3.145 + b) Accompany it with a written offer, valid for at least three
3.146 + years, to give any third party, for a charge no more than your
3.147 + cost of physically performing source distribution, a complete
3.148 + machine-readable copy of the corresponding source code, to be
3.149 + distributed under the terms of Sections 1 and 2 above on a medium
3.150 + customarily used for software interchange; or,
3.151 +
3.152 + c) Accompany it with the information you received as to the offer
3.153 + to distribute corresponding source code. (This alternative is
3.154 + allowed only for noncommercial distribution and only if you
3.155 + received the program in object code or executable form with such
3.156 + an offer, in accord with Subsection b above.)
3.157 +
3.158 +The source code for a work means the preferred form of the work for
3.159 +making modifications to it. For an executable work, complete source
3.160 +code means all the source code for all modules it contains, plus any
3.161 +associated interface definition files, plus the scripts used to
3.162 +control compilation and installation of the executable. However, as a
3.163 +special exception, the source code distributed need not include
3.164 +anything that is normally distributed (in either source or binary
3.165 +form) with the major components (compiler, kernel, and so on) of the
3.166 +operating system on which the executable runs, unless that component
3.167 +itself accompanies the executable.
3.168 +
3.169 +If distribution of executable or object code is made by offering
3.170 +access to copy from a designated place, then offering equivalent
3.171 +access to copy the source code from the same place counts as
3.172 +distribution of the source code, even though third parties are not
3.173 +compelled to copy the source along with the object code.
3.174 +
3.175 + 4. You may not copy, modify, sublicense, or distribute the Program
3.176 +except as expressly provided under this License. Any attempt
3.177 +otherwise to copy, modify, sublicense or distribute the Program is
3.178 +void, and will automatically terminate your rights under this License.
3.179 +However, parties who have received copies, or rights, from you under
3.180 +this License will not have their licenses terminated so long as such
3.181 +parties remain in full compliance.
3.182 +
3.183 + 5. You are not required to accept this License, since you have not
3.184 +signed it. However, nothing else grants you permission to modify or
3.185 +distribute the Program or its derivative works. These actions are
3.186 +prohibited by law if you do not accept this License. Therefore, by
3.187 +modifying or distributing the Program (or any work based on the
3.188 +Program), you indicate your acceptance of this License to do so, and
3.189 +all its terms and conditions for copying, distributing or modifying
3.190 +the Program or works based on it.
3.191 +
3.192 + 6. Each time you redistribute the Program (or any work based on the
3.193 +Program), the recipient automatically receives a license from the
3.194 +original licensor to copy, distribute or modify the Program subject to
3.195 +these terms and conditions. You may not impose any further
3.196 +restrictions on the recipients' exercise of the rights granted herein.
3.197 +You are not responsible for enforcing compliance by third parties to
3.198 +this License.
3.199 +
3.200 + 7. If, as a consequence of a court judgment or allegation of patent
3.201 +infringement or for any other reason (not limited to patent issues),
3.202 +conditions are imposed on you (whether by court order, agreement or
3.203 +otherwise) that contradict the conditions of this License, they do not
3.204 +excuse you from the conditions of this License. If you cannot
3.205 +distribute so as to satisfy simultaneously your obligations under this
3.206 +License and any other pertinent obligations, then as a consequence you
3.207 +may not distribute the Program at all. For example, if a patent
3.208 +license would not permit royalty-free redistribution of the Program by
3.209 +all those who receive copies directly or indirectly through you, then
3.210 +the only way you could satisfy both it and this License would be to
3.211 +refrain entirely from distribution of the Program.
3.212 +
3.213 +If any portion of this section is held invalid or unenforceable under
3.214 +any particular circumstance, the balance of the section is intended to
3.215 +apply and the section as a whole is intended to apply in other
3.216 +circumstances.
3.217 +
3.218 +It is not the purpose of this section to induce you to infringe any
3.219 +patents or other property right claims or to contest validity of any
3.220 +such claims; this section has the sole purpose of protecting the
3.221 +integrity of the free software distribution system, which is
3.222 +implemented by public license practices. Many people have made
3.223 +generous contributions to the wide range of software distributed
3.224 +through that system in reliance on consistent application of that
3.225 +system; it is up to the author/donor to decide if he or she is willing
3.226 +to distribute software through any other system and a licensee cannot
3.227 +impose that choice.
3.228 +
3.229 +This section is intended to make thoroughly clear what is believed to
3.230 +be a consequence of the rest of this License.
3.231 +
3.232 + 8. If the distribution and/or use of the Program is restricted in
3.233 +certain countries either by patents or by copyrighted interfaces, the
3.234 +original copyright holder who places the Program under this License
3.235 +may add an explicit geographical distribution limitation excluding
3.236 +those countries, so that distribution is permitted only in or among
3.237 +countries not thus excluded. In such case, this License incorporates
3.238 +the limitation as if written in the body of this License.
3.239 +
3.240 + 9. The Free Software Foundation may publish revised and/or new versions
3.241 +of the General Public License from time to time. Such new versions will
3.242 +be similar in spirit to the present version, but may differ in detail to
3.243 +address new problems or concerns.
3.244 +
3.245 +Each version is given a distinguishing version number. If the Program
3.246 +specifies a version number of this License which applies to it and "any
3.247 +later version", you have the option of following the terms and conditions
3.248 +either of that version or of any later version published by the Free
3.249 +Software Foundation. If the Program does not specify a version number of
3.250 +this License, you may choose any version ever published by the Free Software
3.251 +Foundation.
3.252 +
3.253 + 10. If you wish to incorporate parts of the Program into other free
3.254 +programs whose distribution conditions are different, write to the author
3.255 +to ask for permission. For software which is copyrighted by the Free
3.256 +Software Foundation, write to the Free Software Foundation; we sometimes
3.257 +make exceptions for this. Our decision will be guided by the two goals
3.258 +of preserving the free status of all derivatives of our free software and
3.259 +of promoting the sharing and reuse of software generally.
3.260 +
3.261 + NO WARRANTY
3.262 +
3.263 + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
3.264 +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
3.265 +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
3.266 +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
3.267 +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
3.268 +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
3.269 +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
3.270 +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
3.271 +REPAIR OR CORRECTION.
3.272 +
3.273 + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
3.274 +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
3.275 +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
3.276 +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
3.277 +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
3.278 +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
3.279 +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
3.280 +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
3.281 +POSSIBILITY OF SUCH DAMAGES.
3.282 +
3.283 + END OF TERMS AND CONDITIONS
3.284 +
3.285 + How to Apply These Terms to Your New Programs
3.286 +
3.287 + If you develop a new program, and you want it to be of the greatest
3.288 +possible use to the public, the best way to achieve this is to make it
3.289 +free software which everyone can redistribute and change under these terms.
3.290 +
3.291 + To do so, attach the following notices to the program. It is safest
3.292 +to attach them to the start of each source file to most effectively
3.293 +convey the exclusion of warranty; and each file should have at least
3.294 +the "copyright" line and a pointer to where the full notice is found.
3.295 +
3.296 + <one line to give the program's name and a brief idea of what it does.>
3.297 + Copyright (C) <year> <name of author>
3.298 +
3.299 + This program is free software; you can redistribute it and/or modify
3.300 + it under the terms of the GNU General Public License as published by
3.301 + the Free Software Foundation; either version 2 of the License, or
3.302 + (at your option) any later version.
3.303 +
3.304 + This program is distributed in the hope that it will be useful,
3.305 + but WITHOUT ANY WARRANTY; without even the implied warranty of
3.306 + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3.307 + GNU General Public License for more details.
3.308 +
3.309 + You should have received a copy of the GNU General Public License along
3.310 + with this program; if not, write to the Free Software Foundation, Inc.,
3.311 + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
3.312 +
3.313 +Also add information on how to contact you by electronic and paper mail.
3.314 +
3.315 +If the program is interactive, make it output a short notice like this
3.316 +when it starts in an interactive mode:
3.317 +
3.318 + Gnomovision version 69, Copyright (C) year name of author
3.319 + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
3.320 + This is free software, and you are welcome to redistribute it
3.321 + under certain conditions; type `show c' for details.
3.322 +
3.323 +The hypothetical commands `show w' and `show c' should show the appropriate
3.324 +parts of the General Public License. Of course, the commands you use may
3.325 +be called something other than `show w' and `show c'; they could even be
3.326 +mouse-clicks or menu items--whatever suits your program.
3.327 +
3.328 +You should also get your employer (if you work as a programmer) or your
3.329 +school, if any, to sign a "copyright disclaimer" for the program, if
3.330 +necessary. Here is a sample; alter the names:
3.331 +
3.332 + Yoyodyne, Inc., hereby disclaims all copyright interest in the program
3.333 + `Gnomovision' (which makes passes at compilers) written by James Hacker.
3.334 +
3.335 + <signature of Ty Coon>, 1 April 1989
3.336 + Ty Coon, President of Vice
3.337 +
3.338 +This General Public License does not permit incorporating your program into
3.339 +proprietary programs. If your program is a subroutine library, you may
3.340 +consider it more useful to permit linking proprietary applications with the
3.341 +library. If this is what you want to do, use the GNU Lesser General
3.342 +Public License instead of this License.