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date Sat, 07 Sep 2019 20:38:09 -0400
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estrain@2 1 GNU GENERAL PUBLIC LICENSE
estrain@2 2 Version 2, June 1991
estrain@2 3
estrain@2 4 Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
estrain@2 5 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
estrain@2 6 Everyone is permitted to copy and distribute verbatim copies
estrain@2 7 of this license document, but changing it is not allowed.
estrain@2 8
estrain@2 9 Preamble
estrain@2 10
estrain@2 11 The licenses for most software are designed to take away your
estrain@2 12 freedom to share and change it. By contrast, the GNU General Public
estrain@2 13 License is intended to guarantee your freedom to share and change free
estrain@2 14 software--to make sure the software is free for all its users. This
estrain@2 15 General Public License applies to most of the Free Software
estrain@2 16 Foundation's software and to any other program whose authors commit to
estrain@2 17 using it. (Some other Free Software Foundation software is covered by
estrain@2 18 the GNU Lesser General Public License instead.) You can apply it to
estrain@2 19 your programs, too.
estrain@2 20
estrain@2 21 When we speak of free software, we are referring to freedom, not
estrain@2 22 price. Our General Public Licenses are designed to make sure that you
estrain@2 23 have the freedom to distribute copies of free software (and charge for
estrain@2 24 this service if you wish), that you receive source code or can get it
estrain@2 25 if you want it, that you can change the software or use pieces of it
estrain@2 26 in new free programs; and that you know you can do these things.
estrain@2 27
estrain@2 28 To protect your rights, we need to make restrictions that forbid
estrain@2 29 anyone to deny you these rights or to ask you to surrender the rights.
estrain@2 30 These restrictions translate to certain responsibilities for you if you
estrain@2 31 distribute copies of the software, or if you modify it.
estrain@2 32
estrain@2 33 For example, if you distribute copies of such a program, whether
estrain@2 34 gratis or for a fee, you must give the recipients all the rights that
estrain@2 35 you have. You must make sure that they, too, receive or can get the
estrain@2 36 source code. And you must show them these terms so they know their
estrain@2 37 rights.
estrain@2 38
estrain@2 39 We protect your rights with two steps: (1) copyright the software, and
estrain@2 40 (2) offer you this license which gives you legal permission to copy,
estrain@2 41 distribute and/or modify the software.
estrain@2 42
estrain@2 43 Also, for each author's protection and ours, we want to make certain
estrain@2 44 that everyone understands that there is no warranty for this free
estrain@2 45 software. If the software is modified by someone else and passed on, we
estrain@2 46 want its recipients to know that what they have is not the original, so
estrain@2 47 that any problems introduced by others will not reflect on the original
estrain@2 48 authors' reputations.
estrain@2 49
estrain@2 50 Finally, any free program is threatened constantly by software
estrain@2 51 patents. We wish to avoid the danger that redistributors of a free
estrain@2 52 program will individually obtain patent licenses, in effect making the
estrain@2 53 program proprietary. To prevent this, we have made it clear that any
estrain@2 54 patent must be licensed for everyone's free use or not licensed at all.
estrain@2 55
estrain@2 56 The precise terms and conditions for copying, distribution and
estrain@2 57 modification follow.
estrain@2 58
estrain@2 59 GNU GENERAL PUBLIC LICENSE
estrain@2 60 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
estrain@2 61
estrain@2 62 0. This License applies to any program or other work which contains
estrain@2 63 a notice placed by the copyright holder saying it may be distributed
estrain@2 64 under the terms of this General Public License. The "Program", below,
estrain@2 65 refers to any such program or work, and a "work based on the Program"
estrain@2 66 means either the Program or any derivative work under copyright law:
estrain@2 67 that is to say, a work containing the Program or a portion of it,
estrain@2 68 either verbatim or with modifications and/or translated into another
estrain@2 69 language. (Hereinafter, translation is included without limitation in
estrain@2 70 the term "modification".) Each licensee is addressed as "you".
estrain@2 71
estrain@2 72 Activities other than copying, distribution and modification are not
estrain@2 73 covered by this License; they are outside its scope. The act of
estrain@2 74 running the Program is not restricted, and the output from the Program
estrain@2 75 is covered only if its contents constitute a work based on the
estrain@2 76 Program (independent of having been made by running the Program).
estrain@2 77 Whether that is true depends on what the Program does.
estrain@2 78
estrain@2 79 1. You may copy and distribute verbatim copies of the Program's
estrain@2 80 source code as you receive it, in any medium, provided that you
estrain@2 81 conspicuously and appropriately publish on each copy an appropriate
estrain@2 82 copyright notice and disclaimer of warranty; keep intact all the
estrain@2 83 notices that refer to this License and to the absence of any warranty;
estrain@2 84 and give any other recipients of the Program a copy of this License
estrain@2 85 along with the Program.
estrain@2 86
estrain@2 87 You may charge a fee for the physical act of transferring a copy, and
estrain@2 88 you may at your option offer warranty protection in exchange for a fee.
estrain@2 89
estrain@2 90 2. You may modify your copy or copies of the Program or any portion
estrain@2 91 of it, thus forming a work based on the Program, and copy and
estrain@2 92 distribute such modifications or work under the terms of Section 1
estrain@2 93 above, provided that you also meet all of these conditions:
estrain@2 94
estrain@2 95 a) You must cause the modified files to carry prominent notices
estrain@2 96 stating that you changed the files and the date of any change.
estrain@2 97
estrain@2 98 b) You must cause any work that you distribute or publish, that in
estrain@2 99 whole or in part contains or is derived from the Program or any
estrain@2 100 part thereof, to be licensed as a whole at no charge to all third
estrain@2 101 parties under the terms of this License.
estrain@2 102
estrain@2 103 c) If the modified program normally reads commands interactively
estrain@2 104 when run, you must cause it, when started running for such
estrain@2 105 interactive use in the most ordinary way, to print or display an
estrain@2 106 announcement including an appropriate copyright notice and a
estrain@2 107 notice that there is no warranty (or else, saying that you provide
estrain@2 108 a warranty) and that users may redistribute the program under
estrain@2 109 these conditions, and telling the user how to view a copy of this
estrain@2 110 License. (Exception: if the Program itself is interactive but
estrain@2 111 does not normally print such an announcement, your work based on
estrain@2 112 the Program is not required to print an announcement.)
estrain@2 113
estrain@2 114 These requirements apply to the modified work as a whole. If
estrain@2 115 identifiable sections of that work are not derived from the Program,
estrain@2 116 and can be reasonably considered independent and separate works in
estrain@2 117 themselves, then this License, and its terms, do not apply to those
estrain@2 118 sections when you distribute them as separate works. But when you
estrain@2 119 distribute the same sections as part of a whole which is a work based
estrain@2 120 on the Program, the distribution of the whole must be on the terms of
estrain@2 121 this License, whose permissions for other licensees extend to the
estrain@2 122 entire whole, and thus to each and every part regardless of who wrote it.
estrain@2 123
estrain@2 124 Thus, it is not the intent of this section to claim rights or contest
estrain@2 125 your rights to work written entirely by you; rather, the intent is to
estrain@2 126 exercise the right to control the distribution of derivative or
estrain@2 127 collective works based on the Program.
estrain@2 128
estrain@2 129 In addition, mere aggregation of another work not based on the Program
estrain@2 130 with the Program (or with a work based on the Program) on a volume of
estrain@2 131 a storage or distribution medium does not bring the other work under
estrain@2 132 the scope of this License.
estrain@2 133
estrain@2 134 3. You may copy and distribute the Program (or a work based on it,
estrain@2 135 under Section 2) in object code or executable form under the terms of
estrain@2 136 Sections 1 and 2 above provided that you also do one of the following:
estrain@2 137
estrain@2 138 a) Accompany it with the complete corresponding machine-readable
estrain@2 139 source code, which must be distributed under the terms of Sections
estrain@2 140 1 and 2 above on a medium customarily used for software interchange; or,
estrain@2 141
estrain@2 142 b) Accompany it with a written offer, valid for at least three
estrain@2 143 years, to give any third party, for a charge no more than your
estrain@2 144 cost of physically performing source distribution, a complete
estrain@2 145 machine-readable copy of the corresponding source code, to be
estrain@2 146 distributed under the terms of Sections 1 and 2 above on a medium
estrain@2 147 customarily used for software interchange; or,
estrain@2 148
estrain@2 149 c) Accompany it with the information you received as to the offer
estrain@2 150 to distribute corresponding source code. (This alternative is
estrain@2 151 allowed only for noncommercial distribution and only if you
estrain@2 152 received the program in object code or executable form with such
estrain@2 153 an offer, in accord with Subsection b above.)
estrain@2 154
estrain@2 155 The source code for a work means the preferred form of the work for
estrain@2 156 making modifications to it. For an executable work, complete source
estrain@2 157 code means all the source code for all modules it contains, plus any
estrain@2 158 associated interface definition files, plus the scripts used to
estrain@2 159 control compilation and installation of the executable. However, as a
estrain@2 160 special exception, the source code distributed need not include
estrain@2 161 anything that is normally distributed (in either source or binary
estrain@2 162 form) with the major components (compiler, kernel, and so on) of the
estrain@2 163 operating system on which the executable runs, unless that component
estrain@2 164 itself accompanies the executable.
estrain@2 165
estrain@2 166 If distribution of executable or object code is made by offering
estrain@2 167 access to copy from a designated place, then offering equivalent
estrain@2 168 access to copy the source code from the same place counts as
estrain@2 169 distribution of the source code, even though third parties are not
estrain@2 170 compelled to copy the source along with the object code.
estrain@2 171
estrain@2 172 4. You may not copy, modify, sublicense, or distribute the Program
estrain@2 173 except as expressly provided under this License. Any attempt
estrain@2 174 otherwise to copy, modify, sublicense or distribute the Program is
estrain@2 175 void, and will automatically terminate your rights under this License.
estrain@2 176 However, parties who have received copies, or rights, from you under
estrain@2 177 this License will not have their licenses terminated so long as such
estrain@2 178 parties remain in full compliance.
estrain@2 179
estrain@2 180 5. You are not required to accept this License, since you have not
estrain@2 181 signed it. However, nothing else grants you permission to modify or
estrain@2 182 distribute the Program or its derivative works. These actions are
estrain@2 183 prohibited by law if you do not accept this License. Therefore, by
estrain@2 184 modifying or distributing the Program (or any work based on the
estrain@2 185 Program), you indicate your acceptance of this License to do so, and
estrain@2 186 all its terms and conditions for copying, distributing or modifying
estrain@2 187 the Program or works based on it.
estrain@2 188
estrain@2 189 6. Each time you redistribute the Program (or any work based on the
estrain@2 190 Program), the recipient automatically receives a license from the
estrain@2 191 original licensor to copy, distribute or modify the Program subject to
estrain@2 192 these terms and conditions. You may not impose any further
estrain@2 193 restrictions on the recipients' exercise of the rights granted herein.
estrain@2 194 You are not responsible for enforcing compliance by third parties to
estrain@2 195 this License.
estrain@2 196
estrain@2 197 7. If, as a consequence of a court judgment or allegation of patent
estrain@2 198 infringement or for any other reason (not limited to patent issues),
estrain@2 199 conditions are imposed on you (whether by court order, agreement or
estrain@2 200 otherwise) that contradict the conditions of this License, they do not
estrain@2 201 excuse you from the conditions of this License. If you cannot
estrain@2 202 distribute so as to satisfy simultaneously your obligations under this
estrain@2 203 License and any other pertinent obligations, then as a consequence you
estrain@2 204 may not distribute the Program at all. For example, if a patent
estrain@2 205 license would not permit royalty-free redistribution of the Program by
estrain@2 206 all those who receive copies directly or indirectly through you, then
estrain@2 207 the only way you could satisfy both it and this License would be to
estrain@2 208 refrain entirely from distribution of the Program.
estrain@2 209
estrain@2 210 If any portion of this section is held invalid or unenforceable under
estrain@2 211 any particular circumstance, the balance of the section is intended to
estrain@2 212 apply and the section as a whole is intended to apply in other
estrain@2 213 circumstances.
estrain@2 214
estrain@2 215 It is not the purpose of this section to induce you to infringe any
estrain@2 216 patents or other property right claims or to contest validity of any
estrain@2 217 such claims; this section has the sole purpose of protecting the
estrain@2 218 integrity of the free software distribution system, which is
estrain@2 219 implemented by public license practices. Many people have made
estrain@2 220 generous contributions to the wide range of software distributed
estrain@2 221 through that system in reliance on consistent application of that
estrain@2 222 system; it is up to the author/donor to decide if he or she is willing
estrain@2 223 to distribute software through any other system and a licensee cannot
estrain@2 224 impose that choice.
estrain@2 225
estrain@2 226 This section is intended to make thoroughly clear what is believed to
estrain@2 227 be a consequence of the rest of this License.
estrain@2 228
estrain@2 229 8. If the distribution and/or use of the Program is restricted in
estrain@2 230 certain countries either by patents or by copyrighted interfaces, the
estrain@2 231 original copyright holder who places the Program under this License
estrain@2 232 may add an explicit geographical distribution limitation excluding
estrain@2 233 those countries, so that distribution is permitted only in or among
estrain@2 234 countries not thus excluded. In such case, this License incorporates
estrain@2 235 the limitation as if written in the body of this License.
estrain@2 236
estrain@2 237 9. The Free Software Foundation may publish revised and/or new versions
estrain@2 238 of the General Public License from time to time. Such new versions will
estrain@2 239 be similar in spirit to the present version, but may differ in detail to
estrain@2 240 address new problems or concerns.
estrain@2 241
estrain@2 242 Each version is given a distinguishing version number. If the Program
estrain@2 243 specifies a version number of this License which applies to it and "any
estrain@2 244 later version", you have the option of following the terms and conditions
estrain@2 245 either of that version or of any later version published by the Free
estrain@2 246 Software Foundation. If the Program does not specify a version number of
estrain@2 247 this License, you may choose any version ever published by the Free Software
estrain@2 248 Foundation.
estrain@2 249
estrain@2 250 10. If you wish to incorporate parts of the Program into other free
estrain@2 251 programs whose distribution conditions are different, write to the author
estrain@2 252 to ask for permission. For software which is copyrighted by the Free
estrain@2 253 Software Foundation, write to the Free Software Foundation; we sometimes
estrain@2 254 make exceptions for this. Our decision will be guided by the two goals
estrain@2 255 of preserving the free status of all derivatives of our free software and
estrain@2 256 of promoting the sharing and reuse of software generally.
estrain@2 257
estrain@2 258 NO WARRANTY
estrain@2 259
estrain@2 260 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
estrain@2 261 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
estrain@2 262 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
estrain@2 263 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
estrain@2 264 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
estrain@2 265 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
estrain@2 266 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
estrain@2 267 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
estrain@2 268 REPAIR OR CORRECTION.
estrain@2 269
estrain@2 270 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
estrain@2 271 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
estrain@2 272 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
estrain@2 273 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
estrain@2 274 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
estrain@2 275 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
estrain@2 276 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
estrain@2 277 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
estrain@2 278 POSSIBILITY OF SUCH DAMAGES.
estrain@2 279
estrain@2 280 END OF TERMS AND CONDITIONS
estrain@2 281
estrain@2 282 How to Apply These Terms to Your New Programs
estrain@2 283
estrain@2 284 If you develop a new program, and you want it to be of the greatest
estrain@2 285 possible use to the public, the best way to achieve this is to make it
estrain@2 286 free software which everyone can redistribute and change under these terms.
estrain@2 287
estrain@2 288 To do so, attach the following notices to the program. It is safest
estrain@2 289 to attach them to the start of each source file to most effectively
estrain@2 290 convey the exclusion of warranty; and each file should have at least
estrain@2 291 the "copyright" line and a pointer to where the full notice is found.
estrain@2 292
estrain@2 293 {description}
estrain@2 294 Copyright (C) {year} {fullname}
estrain@2 295
estrain@2 296 This program is free software; you can redistribute it and/or modify
estrain@2 297 it under the terms of the GNU General Public License as published by
estrain@2 298 the Free Software Foundation; either version 2 of the License, or
estrain@2 299 (at your option) any later version.
estrain@2 300
estrain@2 301 This program is distributed in the hope that it will be useful,
estrain@2 302 but WITHOUT ANY WARRANTY; without even the implied warranty of
estrain@2 303 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
estrain@2 304 GNU General Public License for more details.
estrain@2 305
estrain@2 306 You should have received a copy of the GNU General Public License along
estrain@2 307 with this program; if not, write to the Free Software Foundation, Inc.,
estrain@2 308 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
estrain@2 309
estrain@2 310 Also add information on how to contact you by electronic and paper mail.
estrain@2 311
estrain@2 312 If the program is interactive, make it output a short notice like this
estrain@2 313 when it starts in an interactive mode:
estrain@2 314
estrain@2 315 Gnomovision version 69, Copyright (C) year name of author
estrain@2 316 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
estrain@2 317 This is free software, and you are welcome to redistribute it
estrain@2 318 under certain conditions; type `show c' for details.
estrain@2 319
estrain@2 320 The hypothetical commands `show w' and `show c' should show the appropriate
estrain@2 321 parts of the General Public License. Of course, the commands you use may
estrain@2 322 be called something other than `show w' and `show c'; they could even be
estrain@2 323 mouse-clicks or menu items--whatever suits your program.
estrain@2 324
estrain@2 325 You should also get your employer (if you work as a programmer) or your
estrain@2 326 school, if any, to sign a "copyright disclaimer" for the program, if
estrain@2 327 necessary. Here is a sample; alter the names:
estrain@2 328
estrain@2 329 Yoyodyne, Inc., hereby disclaims all copyright interest in the program
estrain@2 330 `Gnomovision' (which makes passes at compilers) written by James Hacker.
estrain@2 331
estrain@2 332 {signature of Ty Coon}, 1 April 1989
estrain@2 333 Ty Coon, President of Vice
estrain@2 334
estrain@2 335 This General Public License does not permit incorporating your program into
estrain@2 336 proprietary programs. If your program is a subroutine library, you may
estrain@2 337 consider it more useful to permit linking proprietary applications with the
estrain@2 338 library. If this is what you want to do, use the GNU Lesser General
estrain@2 339 Public License instead of this License.