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| The GNU General Public License (GPL) |
| Version 2, June 1991 |
| |
| Copyright (C) 1989, 1991 Free Software Foundation, Inc. |
| 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| Everyone is permitted to copy and distribute verbatim copies |
| of this license document, but changing it is not allowed. |
| |
| Preamble |
| |
| The licenses for most software are designed to take away your freedom to |
| share and change it. By contrast, the GNU General Public License is |
| intended to guarantee your freedom to share and change free software--to |
| make sure the software is free for all its users. This General Public |
| License applies to most of the Free Software Foundation's software and to |
| any other program whose authors commit to using it. (Some other Free |
| Software Foundation software is covered by the GNU Library General Public |
| License instead.) You can apply it to your programs, too. |
| |
| When we speak of free software, we are referring to freedom, not price. |
| Our General Public Licenses are designed to make sure that you have the |
| freedom to distribute copies of free software (and charge for this service |
| if you wish), that you receive source code or can get it if you want it, |
| that you can change the software or use pieces of it in new free programs; |
| and that you know you can do these things. |
| |
| To protect your rights, we need to make restrictions that forbid anyone to |
| deny you these rights or to ask you to surrender the rights. These |
| restrictions translate to certain responsibilities for you if you |
| distribute copies of the software, or if you modify it. |
| |
| For example, if you distribute copies of such a program, whether gratis or |
| for a fee, you must give the recipients all the rights that you have. You |
| must make sure that they, too, receive or can get the source code. And you |
| must show them these terms so they know their rights. |
| |
| We protect your rights with two steps: (1) copyright the software, and (2) |
| offer you this license which gives you legal permission to copy, |
| distribute and/or modify the software. |
| |
| Also, for each author's protection and ours, we want to make certain that |
| everyone understands that there is no warranty for this free software. If |
| the software is modified by someone else and passed on, we want its |
| recipients to know that what they have is not the original, so that any |
| problems introduced by others will not reflect on the original authors' |
| reputations. |
| |
| Finally, any free program is threatened constantly by software patents. We |
| wish to avoid the danger that redistributors of a free program will |
| individually obtain patent licenses, in effect making the program |
| proprietary. To prevent this, we have made it clear that any patent must |
| be licensed for everyone's free use or not licensed at all. |
| |
| The precise terms and conditions for copying, distribution and |
| modification follow. |
| |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION |
| |
| 0. This License applies to any program or other work which contains a |
| notice placed by the copyright holder saying it may be distributed under |
| the terms of this General Public License. The "Program", below, refers to |
| any such program or work, and a "work based on the Program" means either |
| the Program or any derivative work under copyright law: that is to say, a |
| work containing the Program or a portion of it, either verbatim or with |
| modifications and/or translated into another language. (Hereinafter, |
| translation is included without limitation in the term "modification".) |
| Each licensee is addressed as "you". |
| |
| Activities other than copying, distribution and modification are not |
| covered by this License; they are outside its scope. The act of running |
| the Program is not restricted, and the output from the Program is covered |
| only if its contents constitute a work based on the Program (independent |
| of having been made by running the Program). Whether that is true depends |
| on what the Program does. |
| |
| 1. You may copy and distribute verbatim copies of the Program's source |
| code as you receive it, in any medium, provided that you conspicuously and |
| appropriately publish on each copy an appropriate copyright notice and |
| disclaimer of warranty; keep intact all the notices that refer to this |
| License and to the absence of any warranty; and give any other recipients |
| of the Program a copy of this License along with the Program. |
| |
| You may charge a fee for the physical act of transferring a copy, and you |
| may at your option offer warranty protection in exchange for a fee. |
| |
| 2. You may modify your copy or copies of the Program or any portion of it, |
| thus forming a work based on the Program, and copy and distribute such |
| modifications or work under the terms of Section 1 above, provided that |
| you also meet all of these conditions: |
| |
| a) You must cause the modified files to carry prominent notices stating |
| that you changed the files and the date of any change. |
| |
| b) You must cause any work that you distribute or publish, that in whole |
| or in part contains or is derived from the Program or any part thereof, |
| to be licensed as a whole at no charge to all third parties under the |
| terms of this License. |
| |
| c) If the modified program normally reads commands interactively when |
| run, you must cause it, when started running for such interactive use in |
| the most ordinary way, to print or display an announcement including an |
| appropriate copyright notice and a notice that there is no warranty (or |
| else, saying that you provide a warranty) and that users may |
| redistribute the program under these conditions, and telling the user |
| how to view a copy of this License. (Exception: if the Program itself is |
| interactive but does not normally print such an announcement, your work |
| based on the Program is not required to print an announcement.) |
| |
| These requirements apply to the modified work as a whole. If identifiable |
| sections of that work are not derived from the Program, and can be |
| reasonably considered independent and separate works in themselves, then |
| this License, and its terms, do not apply to those sections when you |
| distribute them as separate works. But when you distribute the same |
| sections as part of a whole which is a work based on the Program, the |
| distribution of the whole must be on the terms of this License, whose |
| permissions for other licensees extend to the entire whole, and thus to |
| each and every part regardless of who wrote it. |
| |
| Thus, it is not the intent of this section to claim rights or contest your |
| rights to work written entirely by you; rather, the intent is to exercise |
| the right to control the distribution of derivative or collective works |
| based on the Program. |
| |
| In addition, mere aggregation of another work not based on the Program |
| with the Program (or with a work based on the Program) on a volume of a |
| storage or distribution medium does not bring the other work under the |
| scope of this License. |
| |
| 3. You may copy and distribute the Program (or a work based on it, under |
| Section 2) in object code or executable form under the terms of Sections 1 |
| and 2 above provided that you also do one of the following: |
| |
| a) Accompany it with the complete corresponding machine-readable source |
| code, which must be distributed under the terms of Sections 1 and 2 |
| above on a medium customarily used for software interchange; or, |
| |
| b) Accompany it with a written offer, valid for at least three years, to |
| give any third party, for a charge no more than your cost of physically |
| performing source distribution, a complete machine-readable copy of the |
| corresponding source code, to be distributed under the terms of Sections |
| 1 and 2 above on a medium customarily used for software interchange; or, |
| |
| c) Accompany it with the information you received as to the offer to |
| distribute corresponding source code. (This alternative is allowed only |
| for noncommercial distribution and only if you received the program in |
| object code or executable form with such an offer, in accord with |
| Subsection b above.) |
| |
| The source code for a work means the preferred form of the work for making |
| modifications to it. For an executable work, complete source code means |
| all the source code for all modules it contains, plus any associated |
| interface definition files, plus the scripts used to control compilation |
| and installation of the executable. However, as a special exception, the |
| source code distributed need not include anything that is normally |
| distributed (in either source or binary form) with the major components |
| (compiler, kernel, and so on) of the operating system on which the |
| executable runs, unless that component itself accompanies the executable. |
| |
| If distribution of executable or object code is made by offering access to |
| copy from a designated place, then offering equivalent access to copy the |
| source code from the same place counts as distribution of the source code, |
| even though third parties are not compelled to copy the source along with |
| the object code. |
| |
| 4. You may not copy, modify, sublicense, or distribute the Program except |
| as expressly provided under this License. Any attempt otherwise to copy, |
| modify, sublicense or distribute the Program is void, and will |
| automatically terminate your rights under this License. However, parties |
| who have received copies, or rights, from you under this License will not |
| have their licenses terminated so long as such parties remain in full |
| compliance. |
| |
| 5. You are not required to accept this License, since you have not signed |
| it. However, nothing else grants you permission to modify or distribute |
| the Program or its derivative works. These actions are prohibited by law |
| if you do not accept this License. Therefore, by modifying or distributing |
| the Program (or any work based on the Program), you indicate your |
| acceptance of this License to do so, and all its terms and conditions for |
| copying, distributing or modifying the Program or works based on it. |
| |
| 6. Each time you redistribute the Program (or any work based on the |
| Program), the recipient automatically receives a license from the original |
| licensor to copy, distribute or modify the Program subject to these terms |
| and conditions. You may not impose any further restrictions on the |
| recipients' exercise of the rights granted herein. You are not responsible |
| for enforcing compliance by third parties to this License. |
| |
| 7. If, as a consequence of a court judgment or allegation of patent |
| infringement or for any other reason (not limited to patent issues), |
| conditions are imposed on you (whether by court order, agreement or |
| otherwise) that contradict the conditions of this License, they do not |
| excuse you from the conditions of this License. If you cannot distribute |
| so as to satisfy simultaneously your obligations under this License and |
| any other pertinent obligations, then as a consequence you may not |
| distribute the Program at all. For example, if a patent license would not |
| permit royalty-free redistribution of the Program by all those who receive |
| copies directly or indirectly through you, then the only way you could |
| satisfy both it and this License would be to refrain entirely from |
| distribution of the Program. |
| |
| If any portion of this section is held invalid or unenforceable under any |
| particular circumstance, the balance of the section is intended to apply |
| and the section as a whole is intended to apply in other circumstances. |
| |
| It is not the purpose of this section to induce you to infringe any |
| patents or other property right claims or to contest validity of any such |
| claims; this section has the sole purpose of protecting the integrity of |
| the free software distribution system, which is implemented by public |
| license practices. Many people have made generous contributions to the |
| wide range of software distributed through that system in reliance on |
| consistent application of that system; it is up to the author/donor to |
| decide if he or she is willing to distribute software through any other |
| system and a licensee cannot impose that choice. |
| |
| This section is intended to make thoroughly clear what is believed to be a |
| consequence of the rest of this License. |
| |
| 8. If the distribution and/or use of the Program is restricted in certain |
| countries either by patents or by copyrighted interfaces, the original |
| copyright holder who places the Program under this License may add an |
| explicit geographical distribution limitation excluding those countries, |
| so that distribution is permitted only in or among countries not thus |
| excluded. In such case, this License incorporates the limitation as if |
| written in the body of this License. |
| |
| 9. The Free Software Foundation may publish revised and/or new versions of |
| the General Public License from time to time. Such new versions will be |
| similar in spirit to the present version, but may differ in detail to |
| address new problems or concerns. |
| |
| Each version is given a distinguishing version number. If the Program |
| specifies a version number of this License which applies to it and "any |
| later version", you have the option of following the terms and conditions |
| either of that version or of any later version published by the Free |
| Software Foundation. If the Program does not specify a version number of |
| this License, you may choose any version ever published by the Free |
| Software Foundation. |
| |
| 10. If you wish to incorporate parts of the Program into other free |
| programs whose distribution conditions are different, write to the author |
| to ask for permission. For software which is copyrighted by the Free |
| Software Foundation, write to the Free Software Foundation; we sometimes |
| make exceptions for this. Our decision will be guided by the two goals of |
| preserving the free status of all derivatives of our free software and of |
| promoting the sharing and reuse of software generally. |
| |
| NO WARRANTY |
| |
| 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
| FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
| OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
| PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED |
| OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS |
| TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE |
| PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, |
| REPAIR OR CORRECTION. |
| |
| 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
| WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
| REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, |
| INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES |
| ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT |
| LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES |
| SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE |
| WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN |
| ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. |
| |
| END OF TERMS AND CONDITIONS |
| |
| |