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