0001 GNU GENERAL PUBLIC LICENSE
0002 Version 2, June 1991
0004 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
0005 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
0006 Everyone is permitted to copy and distribute verbatim copies
0007 of this license document, but changing it is not allowed.
0011 The licenses for most software are designed to take away your
0012 freedom to share and change it. By contrast, the GNU General Public
0013 License is intended to guarantee your freedom to share and change free
0014 software--to make sure the software is free for all its users. This
0015 General Public License applies to most of the Free Software
0016 Foundation's software and to any other program whose authors commit to
0017 using it. (Some other Free Software Foundation software is covered by
0018 the GNU Lesser General Public License instead.) You can apply it to
0019 your programs, too.
0021 When we speak of free software, we are referring to freedom, not
0022 price. Our General Public Licenses are designed to make sure that you
0023 have the freedom to distribute copies of free software (and charge for
0024 this service if you wish), that you receive source code or can get it
0025 if you want it, that you can change the software or use pieces of it
0026 in new free programs; and that you know you can do these things.
0028 To protect your rights, we need to make restrictions that forbid
0029 anyone to deny you these rights or to ask you to surrender the rights.
0030 These restrictions translate to certain responsibilities for you if you
0031 distribute copies of the software, or if you modify it.
0033 For example, if you distribute copies of such a program, whether
0034 gratis or for a fee, you must give the recipients all the rights that
0035 you have. You must make sure that they, too, receive or can get the
0036 source code. And you must show them these terms so they know their
0039 We protect your rights with two steps: (1) copyright the software, and
0040 (2) offer you this license which gives you legal permission to copy,
0041 distribute and/or modify the software.
0043 Also, for each author's protection and ours, we want to make certain
0044 that everyone understands that there is no warranty for this free
0045 software. If the software is modified by someone else and passed on, we
0046 want its recipients to know that what they have is not the original, so
0047 that any problems introduced by others will not reflect on the original
0048 authors' reputations.
0050 Finally, any free program is threatened constantly by software
0051 patents. We wish to avoid the danger that redistributors of a free
0052 program will individually obtain patent licenses, in effect making the
0053 program proprietary. To prevent this, we have made it clear that any
0054 patent must be licensed for everyone's free use or not licensed at all.
0056 The precise terms and conditions for copying, distribution and
0057 modification follow.
0059 GNU GENERAL PUBLIC LICENSE
0060 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0062 0. This License applies to any program or other work which contains
0063 a notice placed by the copyright holder saying it may be distributed
0064 under the terms of this General Public License. The "Program", below,
0065 refers to any such program or work, and a "work based on the Program"
0066 means either the Program or any derivative work under copyright law:
0067 that is to say, a work containing the Program or a portion of it,
0068 either verbatim or with modifications and/or translated into another
0069 language. (Hereinafter, translation is included without limitation in
0070 the term "modification".) Each licensee is addressed as "you".
0072 Activities other than copying, distribution and modification are not
0073 covered by this License; they are outside its scope. The act of
0074 running the Program is not restricted, and the output from the Program
0075 is covered only if its contents constitute a work based on the
0076 Program (independent of having been made by running the Program).
0077 Whether that is true depends on what the Program does.
0079 1. You may copy and distribute verbatim copies of the Program's
0080 source code as you receive it, in any medium, provided that you
0081 conspicuously and appropriately publish on each copy an appropriate
0082 copyright notice and disclaimer of warranty; keep intact all the
0083 notices that refer to this License and to the absence of any warranty;
0084 and give any other recipients of the Program a copy of this License
0085 along with the Program.
0087 You may charge a fee for the physical act of transferring a copy, and
0088 you may at your option offer warranty protection in exchange for a fee.
0090 2. You may modify your copy or copies of the Program or any portion
0091 of it, thus forming a work based on the Program, and copy and
0092 distribute such modifications or work under the terms of Section 1
0093 above, provided that you also meet all of these conditions:
0095 a) You must cause the modified files to carry prominent notices
0096 stating that you changed the files and the date of any change.
0098 b) You must cause any work that you distribute or publish, that in
0099 whole or in part contains or is derived from the Program or any
0100 part thereof, to be licensed as a whole at no charge to all third
0101 parties under the terms of this License.
0103 c) If the modified program normally reads commands interactively
0104 when run, you must cause it, when started running for such
0105 interactive use in the most ordinary way, to print or display an
0106 announcement including an appropriate copyright notice and a
0107 notice that there is no warranty (or else, saying that you provide
0108 a warranty) and that users may redistribute the program under
0109 these conditions, and telling the user how to view a copy of this
0110 License. (Exception: if the Program itself is interactive but
0111 does not normally print such an announcement, your work based on
0112 the Program is not required to print an announcement.)
0114 These requirements apply to the modified work as a whole. If
0115 identifiable sections of that work are not derived from the Program,
0116 and can be reasonably considered independent and separate works in
0117 themselves, then this License, and its terms, do not apply to those
0118 sections when you distribute them as separate works. But when you
0119 distribute the same sections as part of a whole which is a work based
0120 on the Program, the distribution of the whole must be on the terms of
0121 this License, whose permissions for other licensees extend to the
0122 entire whole, and thus to each and every part regardless of who wrote it.
0124 Thus, it is not the intent of this section to claim rights or contest
0125 your rights to work written entirely by you; rather, the intent is to
0126 exercise the right to control the distribution of derivative or
0127 collective works based on the Program.
0129 In addition, mere aggregation of another work not based on the Program
0130 with the Program (or with a work based on the Program) on a volume of
0131 a storage or distribution medium does not bring the other work under
0132 the scope of this License.
0134 3. You may copy and distribute the Program (or a work based on it,
0135 under Section 2) in object code or executable form under the terms of
0136 Sections 1 and 2 above provided that you also do one of the following:
0138 a) Accompany it with the complete corresponding machine-readable
0139 source code, which must be distributed under the terms of Sections
0140 1 and 2 above on a medium customarily used for software interchange; or,
0142 b) Accompany it with a written offer, valid for at least three
0143 years, to give any third party, for a charge no more than your
0144 cost of physically performing source distribution, a complete
0145 machine-readable copy of the corresponding source code, to be
0146 distributed under the terms of Sections 1 and 2 above on a medium
0147 customarily used for software interchange; or,
0149 c) Accompany it with the information you received as to the offer
0150 to distribute corresponding source code. (This alternative is
0151 allowed only for noncommercial distribution and only if you
0152 received the program in object code or executable form with such
0153 an offer, in accord with Subsection b above.)
0155 The source code for a work means the preferred form of the work for
0156 making modifications to it. For an executable work, complete source
0157 code means all the source code for all modules it contains, plus any
0158 associated interface definition files, plus the scripts used to
0159 control compilation and installation of the executable. However, as a
0160 special exception, the source code distributed need not include
0161 anything that is normally distributed (in either source or binary
0162 form) with the major components (compiler, kernel, and so on) of the
0163 operating system on which the executable runs, unless that component
0164 itself accompanies the executable.
0166 If distribution of executable or object code is made by offering
0167 access to copy from a designated place, then offering equivalent
0168 access to copy the source code from the same place counts as
0169 distribution of the source code, even though third parties are not
0170 compelled to copy the source along with the object code.
0172 4. You may not copy, modify, sublicense, or distribute the Program
0173 except as expressly provided under this License. Any attempt
0174 otherwise to copy, modify, sublicense or distribute the Program is
0175 void, and will automatically terminate your rights under this License.
0176 However, parties who have received copies, or rights, from you under
0177 this License will not have their licenses terminated so long as such
0178 parties remain in full compliance.
0180 5. You are not required to accept this License, since you have not
0181 signed it. However, nothing else grants you permission to modify or
0182 distribute the Program or its derivative works. These actions are
0183 prohibited by law if you do not accept this License. Therefore, by
0184 modifying or distributing the Program (or any work based on the
0185 Program), you indicate your acceptance of this License to do so, and
0186 all its terms and conditions for copying, distributing or modifying
0187 the Program or works based on it.
0189 6. Each time you redistribute the Program (or any work based on the
0190 Program), the recipient automatically receives a license from the
0191 original licensor to copy, distribute or modify the Program subject to
0192 these terms and conditions. You may not impose any further
0193 restrictions on the recipients' exercise of the rights granted herein.
0194 You are not responsible for enforcing compliance by third parties to
0195 this License.
0197 7. If, as a consequence of a court judgment or allegation of patent
0198 infringement or for any other reason (not limited to patent issues),
0199 conditions are imposed on you (whether by court order, agreement or
0200 otherwise) that contradict the conditions of this License, they do not
0201 excuse you from the conditions of this License. If you cannot
0202 distribute so as to satisfy simultaneously your obligations under this
0203 License and any other pertinent obligations, then as a consequence you
0204 may not distribute the Program at all. For example, if a patent
0205 license would not permit royalty-free redistribution of the Program by
0206 all those who receive copies directly or indirectly through you, then
0207 the only way you could satisfy both it and this License would be to
0208 refrain entirely from distribution of the Program.
0210 If any portion of this section is held invalid or unenforceable under
0211 any particular circumstance, the balance of the section is intended to
0212 apply and the section as a whole is intended to apply in other
0215 It is not the purpose of this section to induce you to infringe any
0216 patents or other property right claims or to contest validity of any
0217 such claims; this section has the sole purpose of protecting the
0218 integrity of the free software distribution system, which is
0219 implemented by public license practices. Many people have made
0220 generous contributions to the wide range of software distributed
0221 through that system in reliance on consistent application of that
0222 system; it is up to the author/donor to decide if he or she is willing
0223 to distribute software through any other system and a licensee cannot
0224 impose that choice.
0226 This section is intended to make thoroughly clear what is believed to
0227 be a consequence of the rest of this License.
0229 8. If the distribution and/or use of the Program is restricted in
0230 certain countries either by patents or by copyrighted interfaces, the
0231 original copyright holder who places the Program under this License
0232 may add an explicit geographical distribution limitation excluding
0233 those countries, so that distribution is permitted only in or among
0234 countries not thus excluded. In such case, this License incorporates
0235 the limitation as if written in the body of this License.
0237 9. The Free Software Foundation may publish revised and/or new versions
0238 of the General Public License from time to time. Such new versions will
0239 be similar in spirit to the present version, but may differ in detail to
0240 address new problems or concerns.
0242 Each version is given a distinguishing version number. If the Program
0243 specifies a version number of this License which applies to it and "any
0244 later version", you have the option of following the terms and conditions
0245 either of that version or of any later version published by the Free
0246 Software Foundation. If the Program does not specify a version number of
0247 this License, you may choose any version ever published by the Free Software
0250 10. If you wish to incorporate parts of the Program into other free
0251 programs whose distribution conditions are different, write to the author
0252 to ask for permission. For software which is copyrighted by the Free
0253 Software Foundation, write to the Free Software Foundation; we sometimes
0254 make exceptions for this. Our decision will be guided by the two goals
0255 of preserving the free status of all derivatives of our free software and
0256 of promoting the sharing and reuse of software generally.
0258 NO WARRANTY
0260 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
0261 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
0262 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
0263 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
0264 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
0265 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
0266 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
0267 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
0268 REPAIR OR CORRECTION.
0270 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
0271 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
0272 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
0273 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
0274 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
0275 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
0276 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
0277 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
0278 POSSIBILITY OF SUCH DAMAGES.
0280 END OF TERMS AND CONDITIONS
0282 How to Apply These Terms to Your New Programs
0284 If you develop a new program, and you want it to be of the greatest
0285 possible use to the public, the best way to achieve this is to make it
0286 free software which everyone can redistribute and change under these terms.
0288 To do so, attach the following notices to the program. It is safest
0289 to attach them to the start of each source file to most effectively
0290 convey the exclusion of warranty; and each file should have at least
0291 the "copyright" line and a pointer to where the full notice is found.
0293 <one line to give the program's name and a brief idea of what it does.>
0294 Copyright (C) <year> <name of author>
0296 This program is free software; you can redistribute it and/or modify
0297 it under the terms of the GNU General Public License as published by
0298 the Free Software Foundation; either version 2 of the License, or
0299 (at your option) any later version.
0301 This program is distributed in the hope that it will be useful,
0302 but WITHOUT ANY WARRANTY; without even the implied warranty of
0303 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
0304 GNU General Public License for more details.
0306 You should have received a copy of the GNU General Public License along
0307 with this program; if not, write to the Free Software Foundation, Inc.,
0308 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
0310 Also add information on how to contact you by electronic and paper mail.
0312 If the program is interactive, make it output a short notice like this
0313 when it starts in an interactive mode:
0315 Gnomovision version 69, Copyright (C) year name of author
0316 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
0317 This is free software, and you are welcome to redistribute it
0318 under certain conditions; type `show c' for details.
0320 The hypothetical commands `show w' and `show c' should show the appropriate
0321 parts of the General Public License. Of course, the commands you use may
0322 be called something other than `show w' and `show c'; they could even be
0323 mouse-clicks or menu items--whatever suits your program.
0325 You should also get your employer (if you work as a programmer) or your
0326 school, if any, to sign a "copyright disclaimer" for the program, if
0327 necessary. Here is a sample; alter the names:
0329 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
0330 `Gnomovision' (which makes passes at compilers) written by James Hacker.
0332 <signature of Ty Coon>, 1 April 1989
0333 Ty Coon, President of Vice
0335 This General Public License does not permit incorporating your program into
0336 proprietary programs. If your program is a subroutine library, you may
0337 consider it more useful to permit linking proprietary applications with the
0338 library. If this is what you want to do, use the GNU Lesser General
0339 Public License instead of this License.