1 2Files described as being under the "GNU General Public License version 2" 3or simply the "GPLv2" fall under the following license. 4 5Note that this copyright does not cover user programs that use kernel 6services by normal system calls --- this is merely considered normal use 7of the kernel, and does not fall under the heading of "derived work". 8 9Also note that while the Free Software Foundation owns the copyright to 10the license text below, copyright for the actual files included in this 11project are held by their respective owners, indicated at the top of 12each file. 13 14----------------------------------------------------------------------- 15 16 GNU GENERAL PUBLIC LICENSE 17 Version 2, June 1991 18 19 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 20 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 Everyone is permitted to copy and distribute verbatim copies 22 of this license document, but changing it is not allowed. 23 24 Preamble 25 26 The licenses for most software are designed to take away your 27freedom to share and change it. By contrast, the GNU General Public 28License is intended to guarantee your freedom to share and change free 29software--to make sure the software is free for all its users. This 30General Public License applies to most of the Free Software 31Foundation's software and to any other program whose authors commit to 32using it. (Some other Free Software Foundation software is covered by 33the GNU Lesser General Public License instead.) You can apply it to 34your programs, too. 35 36 When we speak of free software, we are referring to freedom, not 37price. Our General Public Licenses are designed to make sure that you 38have the freedom to distribute copies of free software (and charge for 39this service if you wish), that you receive source code or can get it 40if you want it, that you can change the software or use pieces of it 41in new free programs; and that you know you can do these things. 42 43 To protect your rights, we need to make restrictions that forbid 44anyone to deny you these rights or to ask you to surrender the rights. 45These restrictions translate to certain responsibilities for you if you 46distribute copies of the software, or if you modify it. 47 48 For example, if you distribute copies of such a program, whether 49gratis or for a fee, you must give the recipients all the rights that 50you have. You must make sure that they, too, receive or can get the 51source code. And you must show them these terms so they know their 52rights. 53 54 We protect your rights with two steps: (1) copyright the software, and 55(2) offer you this license which gives you legal permission to copy, 56distribute and/or modify the software. 57 58 Also, for each author's protection and ours, we want to make certain 59that everyone understands that there is no warranty for this free 60software. If the software is modified by someone else and passed on, we 61want its recipients to know that what they have is not the original, so 62that any problems introduced by others will not reflect on the original 63authors' reputations. 64 65 Finally, any free program is threatened constantly by software 66patents. We wish to avoid the danger that redistributors of a free 67program will individually obtain patent licenses, in effect making the 68program proprietary. To prevent this, we have made it clear that any 69patent must be licensed for everyone's free use or not licensed at all. 70 71 The precise terms and conditions for copying, distribution and 72modification follow. 73 74 GNU GENERAL PUBLIC LICENSE 75 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 76 77 0. This License applies to any program or other work which contains 78a notice placed by the copyright holder saying it may be distributed 79under the terms of this General Public License. The "Program", below, 80refers to any such program or work, and a "work based on the Program" 81means either the Program or any derivative work under copyright law: 82that is to say, a work containing the Program or a portion of it, 83either verbatim or with modifications and/or translated into another 84language. (Hereinafter, translation is included without limitation in 85the term "modification".) Each licensee is addressed as "you". 86 87Activities other than copying, distribution and modification are not 88covered by this License; they are outside its scope. The act of 89running the Program is not restricted, and the output from the Program 90is covered only if its contents constitute a work based on the 91Program (independent of having been made by running the Program). 92Whether that is true depends on what the Program does. 93 94 1. You may copy and distribute verbatim copies of the Program's 95source code as you receive it, in any medium, provided that you 96conspicuously and appropriately publish on each copy an appropriate 97copyright notice and disclaimer of warranty; keep intact all the 98notices that refer to this License and to the absence of any warranty; 99and give any other recipients of the Program a copy of this License 100along with the Program. 101 102You may charge a fee for the physical act of transferring a copy, and 103you may at your option offer warranty protection in exchange for a fee. 104 105 2. You may modify your copy or copies of the Program or any portion 106of it, thus forming a work based on the Program, and copy and 107distribute such modifications or work under the terms of Section 1 108above, provided that you also meet all of these conditions: 109 110 a) You must cause the modified files to carry prominent notices 111 stating that you changed the files and the date of any change. 112 113 b) You must cause any work that you distribute or publish, that in 114 whole or in part contains or is derived from the Program or any 115 part thereof, to be licensed as a whole at no charge to all third 116 parties under the terms of this License. 117 118 c) If the modified program normally reads commands interactively 119 when run, you must cause it, when started running for such 120 interactive use in the most ordinary way, to print or display an 121 announcement including an appropriate copyright notice and a 122 notice that there is no warranty (or else, saying that you provide 123 a warranty) and that users may redistribute the program under 124 these conditions, and telling the user how to view a copy of this 125 License. (Exception: if the Program itself is interactive but 126 does not normally print such an announcement, your work based on 127 the Program is not required to print an announcement.) 128 129These requirements apply to the modified work as a whole. If 130identifiable sections of that work are not derived from the Program, 131and can be reasonably considered independent and separate works in 132themselves, then this License, and its terms, do not apply to those 133sections when you distribute them as separate works. But when you 134distribute the same sections as part of a whole which is a work based 135on the Program, the distribution of the whole must be on the terms of 136this License, whose permissions for other licensees extend to the 137entire whole, and thus to each and every part regardless of who wrote it. 138 139Thus, it is not the intent of this section to claim rights or contest 140your rights to work written entirely by you; rather, the intent is to 141exercise the right to control the distribution of derivative or 142collective works based on the Program. 143 144In addition, mere aggregation of another work not based on the Program 145with the Program (or with a work based on the Program) on a volume of 146a storage or distribution medium does not bring the other work under 147the scope of this License. 148 149 3. You may copy and distribute the Program (or a work based on it, 150under Section 2) in object code or executable form under the terms of 151Sections 1 and 2 above provided that you also do one of the following: 152 153 a) Accompany it with the complete corresponding machine-readable 154 source code, which must be distributed under the terms of Sections 155 1 and 2 above on a medium customarily used for software interchange; or, 156 157 b) Accompany it with a written offer, valid for at least three 158 years, to give any third party, for a charge no more than your 159 cost of physically performing source distribution, a complete 160 machine-readable copy of the corresponding source code, to be 161 distributed under the terms of Sections 1 and 2 above on a medium 162 customarily used for software interchange; or, 163 164 c) Accompany it with the information you received as to the offer 165 to distribute corresponding source code. (This alternative is 166 allowed only for noncommercial distribution and only if you 167 received the program in object code or executable form with such 168 an offer, in accord with Subsection b above.) 169 170The source code for a work means the preferred form of the work for 171making modifications to it. For an executable work, complete source 172code means all the source code for all modules it contains, plus any 173associated interface definition files, plus the scripts used to 174control compilation and installation of the executable. However, as a 175special exception, the source code distributed need not include 176anything that is normally distributed (in either source or binary 177form) with the major components (compiler, kernel, and so on) of the 178operating system on which the executable runs, unless that component 179itself accompanies the executable. 180 181If distribution of executable or object code is made by offering 182access to copy from a designated place, then offering equivalent 183access to copy the source code from the same place counts as 184distribution of the source code, even though third parties are not 185compelled to copy the source along with the object code. 186 187 4. You may not copy, modify, sublicense, or distribute the Program 188except as expressly provided under this License. Any attempt 189otherwise to copy, modify, sublicense or distribute the Program is 190void, and will automatically terminate your rights under this License. 191However, parties who have received copies, or rights, from you under 192this License will not have their licenses terminated so long as such 193parties remain in full compliance. 194 195 5. You are not required to accept this License, since you have not 196signed it. However, nothing else grants you permission to modify or 197distribute the Program or its derivative works. These actions are 198prohibited by law if you do not accept this License. Therefore, by 199modifying or distributing the Program (or any work based on the 200Program), you indicate your acceptance of this License to do so, and 201all its terms and conditions for copying, distributing or modifying 202the Program or works based on it. 203 204 6. Each time you redistribute the Program (or any work based on the 205Program), the recipient automatically receives a license from the 206original licensor to copy, distribute or modify the Program subject to 207these terms and conditions. You may not impose any further 208restrictions on the recipients' exercise of the rights granted herein. 209You are not responsible for enforcing compliance by third parties to 210this License. 211 212 7. If, as a consequence of a court judgment or allegation of patent 213infringement or for any other reason (not limited to patent issues), 214conditions are imposed on you (whether by court order, agreement or 215otherwise) that contradict the conditions of this License, they do not 216excuse you from the conditions of this License. If you cannot 217distribute so as to satisfy simultaneously your obligations under this 218License and any other pertinent obligations, then as a consequence you 219may not distribute the Program at all. For example, if a patent 220license would not permit royalty-free redistribution of the Program by 221all those who receive copies directly or indirectly through you, then 222the only way you could satisfy both it and this License would be to 223refrain entirely from distribution of the Program. 224 225If any portion of this section is held invalid or unenforceable under 226any particular circumstance, the balance of the section is intended to 227apply and the section as a whole is intended to apply in other 228circumstances. 229 230It is not the purpose of this section to induce you to infringe any 231patents or other property right claims or to contest validity of any 232such claims; this section has the sole purpose of protecting the 233integrity of the free software distribution system, which is 234implemented by public license practices. Many people have made 235generous contributions to the wide range of software distributed 236through that system in reliance on consistent application of that 237system; it is up to the author/donor to decide if he or she is willing 238to distribute software through any other system and a licensee cannot 239impose that choice. 240 241This section is intended to make thoroughly clear what is believed to 242be a consequence of the rest of this License. 243 244 8. If the distribution and/or use of the Program is restricted in 245certain countries either by patents or by copyrighted interfaces, the 246original copyright holder who places the Program under this License 247may add an explicit geographical distribution limitation excluding 248those countries, so that distribution is permitted only in or among 249countries not thus excluded. In such case, this License incorporates 250the limitation as if written in the body of this License. 251 252 9. The Free Software Foundation may publish revised and/or new versions 253of the General Public License from time to time. Such new versions will 254be similar in spirit to the present version, but may differ in detail to 255address new problems or concerns. 256 257Each version is given a distinguishing version number. If the Program 258specifies a version number of this License which applies to it and "any 259later version", you have the option of following the terms and conditions 260either of that version or of any later version published by the Free 261Software Foundation. If the Program does not specify a version number of 262this License, you may choose any version ever published by the Free Software 263Foundation. 264 265 10. If you wish to incorporate parts of the Program into other free 266programs whose distribution conditions are different, write to the author 267to ask for permission. For software which is copyrighted by the Free 268Software Foundation, write to the Free Software Foundation; we sometimes 269make exceptions for this. Our decision will be guided by the two goals 270of preserving the free status of all derivatives of our free software and 271of promoting the sharing and reuse of software generally. 272 273 NO WARRANTY 274 275 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 276FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 277OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 278PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 279OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 280MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 281TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 282PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 283REPAIR OR CORRECTION. 284 285 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 286WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 287REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 288INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 289OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 290TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 291YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 292PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 293POSSIBILITY OF SUCH DAMAGES. 294 295 END OF TERMS AND CONDITIONS 296