Changes between Version 2 and Version 3 of GPL

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  • GPL

    v2 v3  
    1 = GNU GENERAL PUBLIC LICENSE = 
    2 Version 2, June 1991 
    3  
    4 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 
    5 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 
    6 Everyone is permitted to copy and distribute verbatim copies 
    7 of this license document, but changing it is not allowed. 
    8  
    9 Preamble 
    10  
    11 The licenses for most software are designed to take away your 
    12 freedom to share and change it.  By contrast, the GNU General Public 
    13 License is intended to guarantee your freedom to share and change free 
    14 software--to make sure the software is free for all its users.  This 
    15 General Public License applies to most of the Free Software 
    16 Foundation's software and to any other program whose authors commit to 
    17 using it.  (Some other Free Software Foundation software is covered by 
    18 the GNU Lesser General Public License instead.)  You can apply it to 
    19 your programs, too. 
    20  
    21 When we speak of free software, we are referring to freedom, not 
    22 price.  Our General Public Licenses are designed to make sure that you 
    23 have the freedom to distribute copies of free software (and charge for 
    24 this service if you wish), that you receive source code or can get it 
    25 if you want it, that you can change the software or use pieces of it 
    26 in new free programs; and that you know you can do these things. 
    27  
    28 To protect your rights, we need to make restrictions that forbid 
    29 anyone to deny you these rights or to ask you to surrender the rights. 
    30 These restrictions translate to certain responsibilities for you if you 
    31 distribute copies of the software, or if you modify it. 
    32  
    33 For example, if you distribute copies of such a program, whether 
    34 gratis or for a fee, you must give the recipients all the rights that 
    35 you have.  You must make sure that they, too, receive or can get the 
    36 source code.  And you must show them these terms so they know their 
    37 rights. 
    38  
    39 We protect your rights with two steps: (1) copyright the software, and 
    40 (2) offer you this license which gives you legal permission to copy, 
    41 distribute and/or modify the software. 
    42  
    43 Also, for each author's protection and ours, we want to make certain 
    44 that everyone understands that there is no warranty for this free 
    45 software.  If the software is modified by someone else and passed on, we 
    46 want its recipients to know that what they have is not the original, so 
    47 that any problems introduced by others will not reflect on the original 
    48 authors' reputations. 
    49  
    50 Finally, any free program is threatened constantly by software 
    51 patents.  We wish to avoid the danger that redistributors of a free 
    52 program will individually obtain patent licenses, in effect making the 
    53 program proprietary.  To prevent this, we have made it clear that any 
    54 patent must be licensed for everyone's free use or not licensed at all. 
    55  
    56 The precise terms and conditions for copying, distribution and 
    57 modification follow. 
    58  
    59 GNU GENERAL PUBLIC LICENSE 
    60 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 
    61  
    62 0. This License applies to any program or other work which contains 
    63 a notice placed by the copyright holder saying it may be distributed 
    64 under the terms of this General Public License.  The "Program", below, 
    65 refers to any such program or work, and a "work based on the Program" 
    66 means either the Program or any derivative work under copyright law: 
    67 that is to say, a work containing the Program or a portion of it, 
    68 either verbatim or with modifications and/or translated into another 
    69 language.  (Hereinafter, translation is included without limitation in 
    70 the term "modification".)  Each licensee is addressed as "you". 
    71  
    72 Activities other than copying, distribution and modification are not 
    73 covered by this License; they are outside its scope.  The act of 
    74 running the Program is not restricted, and the output from the Program 
    75 is covered only if its contents constitute a work based on the 
    76 Program (independent of having been made by running the Program). 
    77 Whether that is true depends on what the Program does. 
    78  
    79 1. You may copy and distribute verbatim copies of the Program's 
    80 source code as you receive it, in any medium, provided that you 
    81 conspicuously and appropriately publish on each copy an appropriate 
    82 copyright notice and disclaimer of warranty; keep intact all the 
    83 notices that refer to this License and to the absence of any warranty; 
    84 and give any other recipients of the Program a copy of this License 
    85 along with the Program. 
    86  
    87 You may charge a fee for the physical act of transferring a copy, and 
    88 you may at your option offer warranty protection in exchange for a fee. 
    89  
    90 2. You may modify your copy or copies of the Program or any portion 
    91 of it, thus forming a work based on the Program, and copy and 
    92 distribute such modifications or work under the terms of Section 1 
    93 above, provided that you also meet all of these conditions: 
    94  
    95     a) You must cause the modified files to carry prominent notices 
    96     stating that you changed the files and the date of any change. 
    97  
    98     b) You must cause any work that you distribute or publish, that in 
    99     whole or in part contains or is derived from the Program or any 
    100     part thereof, to be licensed as a whole at no charge to all third 
    101     parties under the terms of this License. 
    102  
    103     c) If the modified program normally reads commands interactively 
    104     when run, you must cause it, when started running for such 
    105     interactive use in the most ordinary way, to print or display an 
    106     announcement including an appropriate copyright notice and a 
    107     notice that there is no warranty (or else, saying that you provide 
    108     a warranty) and that users may redistribute the program under 
    109     these conditions, and telling the user how to view a copy of this 
    110     License.  (Exception: if the Program itself is interactive but 
    111     does not normally print such an announcement, your work based on 
    112     the Program is not required to print an announcement.) 
    113  
    114 These requirements apply to the modified work as a whole.  If 
    115 identifiable sections of that work are not derived from the Program, 
    116 and can be reasonably considered independent and separate works in 
    117 themselves, then this License, and its terms, do not apply to those 
    118 sections when you distribute them as separate works.  But when you 
    119 distribute the same sections as part of a whole which is a work based 
    120 on the Program, the distribution of the whole must be on the terms of 
    121 this License, whose permissions for other licensees extend to the 
    122 entire whole, and thus to each and every part regardless of who wrote it. 
    123  
    124 Thus, it is not the intent of this section to claim rights or contest 
    125 your rights to work written entirely by you; rather, the intent is to 
    126 exercise the right to control the distribution of derivative or 
    127 collective works based on the Program. 
    128  
    129 In addition, mere aggregation of another work not based on the Program 
    130 with the Program (or with a work based on the Program) on a volume of 
    131 a storage or distribution medium does not bring the other work under 
    132 the scope of this License. 
    133  
    134 3. You may copy and distribute the Program (or a work based on it, 
    135 under Section 2) in object code or executable form under the terms of 
    136 Sections 1 and 2 above provided that you also do one of the following: 
    137  
    138     a) Accompany it with the complete corresponding machine-readable 
    139     source code, which must be distributed under the terms of Sections 
    140     1 and 2 above on a medium customarily used for software interchange; or, 
    141  
    142     b) Accompany it with a written offer, valid for at least three 
    143     years, to give any third party, for a charge no more than your 
    144     cost of physically performing source distribution, a complete 
    145     machine-readable copy of the corresponding source code, to be 
    146     distributed under the terms of Sections 1 and 2 above on a medium 
    147     customarily used for software interchange; or, 
    148  
    149     c) Accompany it with the information you received as to the offer 
    150     to distribute corresponding source code.  (This alternative is 
    151     allowed only for noncommercial distribution and only if you 
    152     received the program in object code or executable form with such 
    153     an offer, in accord with Subsection b above.) 
    154  
    155 The source code for a work means the preferred form of the work for 
    156 making modifications to it.  For an executable work, complete source 
    157 code means all the source code for all modules it contains, plus any 
    158 associated interface definition files, plus the scripts used to 
    159 control compilation and installation of the executable.  However, as a 
    160 special exception, the source code distributed need not include 
    161 anything that is normally distributed (in either source or binary 
    162 form) with the major components (compiler, kernel, and so on) of the 
    163 operating system on which the executable runs, unless that component 
    164 itself accompanies the executable. 
    165  
    166 If distribution of executable or object code is made by offering 
    167 access to copy from a designated place, then offering equivalent 
    168 access to copy the source code from the same place counts as 
    169 distribution of the source code, even though third parties are not 
    170 compelled to copy the source along with the object code. 
    171  
    172 4. You may not copy, modify, sublicense, or distribute the Program 
    173 except as expressly provided under this License.  Any attempt 
    174 otherwise to copy, modify, sublicense or distribute the Program is 
    175 void, and will automatically terminate your rights under this License. 
    176 However, parties who have received copies, or rights, from you under 
    177 this License will not have their licenses terminated so long as such 
    178 parties remain in full compliance. 
    179  
    180 5. You are not required to accept this License, since you have not 
    181 signed it.  However, nothing else grants you permission to modify or 
    182 distribute the Program or its derivative works.  These actions are 
    183 prohibited by law if you do not accept this License.  Therefore, by 
    184 modifying or distributing the Program (or any work based on the 
    185 Program), you indicate your acceptance of this License to do so, and 
    186 all its terms and conditions for copying, distributing or modifying 
    187 the Program or works based on it. 
    188  
    189 6. Each time you redistribute the Program (or any work based on the 
    190 Program), the recipient automatically receives a license from the 
    191 original licensor to copy, distribute or modify the Program subject to 
    192 these terms and conditions.  You may not impose any further 
    193 restrictions on the recipients' exercise of the rights granted herein. 
    194 You are not responsible for enforcing compliance by third parties to 
    195 this License. 
    196  
    197 7. If, as a consequence of a court judgment or allegation of patent 
    198 infringement or for any other reason (not limited to patent issues), 
    199 conditions are imposed on you (whether by court order, agreement or 
    200 otherwise) that contradict the conditions of this License, they do not 
    201 excuse you from the conditions of this License.  If you cannot 
    202 distribute so as to satisfy simultaneously your obligations under this 
    203 License and any other pertinent obligations, then as a consequence you 
    204 may not distribute the Program at all.  For example, if a patent 
    205 license would not permit royalty-free redistribution of the Program by 
    206 all those who receive copies directly or indirectly through you, then 
    207 the only way you could satisfy both it and this License would be to 
    208 refrain entirely from distribution of the Program. 
    209  
    210 If any portion of this section is held invalid or unenforceable under 
    211 any particular circumstance, the balance of the section is intended to 
    212 apply and the section as a whole is intended to apply in other 
    213 circumstances. 
    214  
    215 It is not the purpose of this section to induce you to infringe any 
    216 patents or other property right claims or to contest validity of any 
    217 such claims; this section has the sole purpose of protecting the 
    218 integrity of the free software distribution system, which is 
    219 implemented by public license practices.  Many people have made 
    220 generous contributions to the wide range of software distributed 
    221 through that system in reliance on consistent application of that 
    222 system; it is up to the author/donor to decide if he or she is willing 
    223 to distribute software through any other system and a licensee cannot 
    224 impose that choice. 
    225  
    226 This section is intended to make thoroughly clear what is believed to 
    227 be a consequence of the rest of this License. 
    228  
    229 8. If the distribution and/or use of the Program is restricted in 
    230 certain countries either by patents or by copyrighted interfaces, the 
    231 original copyright holder who places the Program under this License 
    232 may add an explicit geographical distribution limitation excluding 
    233 those countries, so that distribution is permitted only in or among 
    234 countries not thus excluded.  In such case, this License incorporates 
    235 the limitation as if written in the body of this License. 
    236  
    237 9. The Free Software Foundation may publish revised and/or new versions 
    238 of the General Public License from time to time.  Such new versions will 
    239 be similar in spirit to the present version, but may differ in detail to 
    240 address new problems or concerns. 
    241  
    242 Each version is given a distinguishing version number.  If the Program 
    243 specifies a version number of this License which applies to it and "any 
    244 later version", you have the option of following the terms and conditions 
    245 either of that version or of any later version published by the Free 
    246 Software Foundation.  If the Program does not specify a version number of 
    247 this License, you may choose any version ever published by the Free Software 
    248 Foundation. 
    249  
    250 10. If you wish to incorporate parts of the Program into other free 
    251 programs whose distribution conditions are different, write to the author 
    252 to ask for permission.  For software which is copyrighted by the Free 
    253 Software Foundation, write to the Free Software Foundation; we sometimes 
    254 make exceptions for this.  Our decision will be guided by the two goals 
    255 of preserving the free status of all derivatives of our free software and 
    256 of promoting the sharing and reuse of software generally. 
    257  
    258 NO WARRANTY 
    259  
    260 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 
    261 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN 
    262 OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 
    263 PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 
    264 OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
    265 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS 
    266 TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE 
    267 PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 
    268 REPAIR OR CORRECTION. 
    269  
    270 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 
    271 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 
    272 REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 
    273 INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 
    274 OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 
    275 TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 
    276 YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 
    277 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 
    278 POSSIBILITY OF SUCH DAMAGES. 
    279  
    280   END OF TERMS AND CONDITIONS 
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