1 XEN NOTICE 2 ========== 3 4This license does *not* cover guest operating systems that use 5Xen services via normal hypercalls - this is merely considered normal 6use of Xen, and does *not* fall under the heading of "derived work". 7Also note that the GPL below is copyrighted by the Free Software 8Foundation, but the instance of code that it refers to (the Xen 9virtual machine monitor) is copyrighted by me and others who actually 10wrote it. 11 12A few files are licensed under both GPL and a weaker BSD-style 13license. This includes all files within the subdirectory 14include/public, as described in include/public/COPYING. All such files 15include the non-GPL license text as a source-code comment. Although 16the license text refers generically to "the software", the non-GPL 17license applies *only* to those source files that explicitly include 18the non-GPL license text. 19 20Note that the only valid version of the GPL as far as Xen is concerned 21is _this_ particular version of the license (i.e., *only* v2, not v2.2 22or v3.x or whatever), unless explicitly otherwise stated. 23 24 -- Keir Fraser (on behalf of the Xen team) 25 26===================================================================== 27 28 GNU GENERAL PUBLIC LICENSE 29 Version 2, June 1991 30 31 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 32 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 33 Everyone is permitted to copy and distribute verbatim copies 34 of this license document, but changing it is not allowed. 35 36 Preamble 37 38 The licenses for most software are designed to take away your 39freedom to share and change it. By contrast, the GNU General Public 40License is intended to guarantee your freedom to share and change free 41software--to make sure the software is free for all its users. This 42General Public License applies to most of the Free Software 43Foundation's software and to any other program whose authors commit to 44using it. (Some other Free Software Foundation software is covered by 45the GNU Library General Public License instead.) You can apply it to 46your programs, too. 47 48 When we speak of free software, we are referring to freedom, not 49price. Our General Public Licenses are designed to make sure that you 50have the freedom to distribute copies of free software (and charge for 51this service if you wish), that you receive source code or can get it 52if you want it, that you can change the software or use pieces of it 53in new free programs; and that you know you can do these things. 54 55 To protect your rights, we need to make restrictions that forbid 56anyone to deny you these rights or to ask you to surrender the rights. 57These restrictions translate to certain responsibilities for you if you 58distribute copies of the software, or if you modify it. 59 60 For example, if you distribute copies of such a program, whether 61gratis or for a fee, you must give the recipients all the rights that 62you have. You must make sure that they, too, receive or can get the 63source code. And you must show them these terms so they know their 64rights. 65 66 We protect your rights with two steps: (1) copyright the software, and 67(2) offer you this license which gives you legal permission to copy, 68distribute and/or modify the software. 69 70 Also, for each author's protection and ours, we want to make certain 71that everyone understands that there is no warranty for this free 72software. If the software is modified by someone else and passed on, we 73want its recipients to know that what they have is not the original, so 74that any problems introduced by others will not reflect on the original 75authors' reputations. 76 77 Finally, any free program is threatened constantly by software 78patents. We wish to avoid the danger that redistributors of a free 79program will individually obtain patent licenses, in effect making the 80program proprietary. To prevent this, we have made it clear that any 81patent must be licensed for everyone's free use or not licensed at all. 82 83 The precise terms and conditions for copying, distribution and 84modification follow. 85 86 GNU GENERAL PUBLIC LICENSE 87 TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 88 89 0. This License applies to any program or other work which contains 90a notice placed by the copyright holder saying it may be distributed 91under the terms of this General Public License. The "Program", below, 92refers to any such program or work, and a "work based on the Program" 93means either the Program or any derivative work under copyright law: 94that is to say, a work containing the Program or a portion of it, 95either verbatim or with modifications and/or translated into another 96language. (Hereinafter, translation is included without limitation in 97the term "modification".) Each licensee is addressed as "you". 98 99Activities other than copying, distribution and modification are not 100covered by this License; they are outside its scope. The act of 101running the Program is not restricted, and the output from the Program 102is covered only if its contents constitute a work based on the 103Program (independent of having been made by running the Program). 104Whether that is true depends on what the Program does. 105 106 1. You may copy and distribute verbatim copies of the Program's 107source code as you receive it, in any medium, provided that you 108conspicuously and appropriately publish on each copy an appropriate 109copyright notice and disclaimer of warranty; keep intact all the 110notices that refer to this License and to the absence of any warranty; 111and give any other recipients of the Program a copy of this License 112along with the Program. 113 114You may charge a fee for the physical act of transferring a copy, and 115you may at your option offer warranty protection in exchange for a fee. 116 117 2. You may modify your copy or copies of the Program or any portion 118of it, thus forming a work based on the Program, and copy and 119distribute such modifications or work under the terms of Section 1 120above, provided that you also meet all of these conditions: 121 122 a) You must cause the modified files to carry prominent notices 123 stating that you changed the files and the date of any change. 124 125 b) You must cause any work that you distribute or publish, that in 126 whole or in part contains or is derived from the Program or any 127 part thereof, to be licensed as a whole at no charge to all third 128 parties under the terms of this License. 129 130 c) If the modified program normally reads commands interactively 131 when run, you must cause it, when started running for such 132 interactive use in the most ordinary way, to print or display an 133 announcement including an appropriate copyright notice and a 134 notice that there is no warranty (or else, saying that you provide 135 a warranty) and that users may redistribute the program under 136 these conditions, and telling the user how to view a copy of this 137 License. (Exception: if the Program itself is interactive but 138 does not normally print such an announcement, your work based on 139 the Program is not required to print an announcement.) 140 141These requirements apply to the modified work as a whole. If 142identifiable sections of that work are not derived from the Program, 143and can be reasonably considered independent and separate works in 144themselves, then this License, and its terms, do not apply to those 145sections when you distribute them as separate works. But when you 146distribute the same sections as part of a whole which is a work based 147on the Program, the distribution of the whole must be on the terms of 148this License, whose permissions for other licensees extend to the 149entire whole, and thus to each and every part regardless of who wrote it. 150 151Thus, it is not the intent of this section to claim rights or contest 152your rights to work written entirely by you; rather, the intent is to 153exercise the right to control the distribution of derivative or 154collective works based on the Program. 155 156In addition, mere aggregation of another work not based on the Program 157with the Program (or with a work based on the Program) on a volume of 158a storage or distribution medium does not bring the other work under 159the scope of this License. 160 161 3. You may copy and distribute the Program (or a work based on it, 162under Section 2) in object code or executable form under the terms of 163Sections 1 and 2 above provided that you also do one of the following: 164 165 a) Accompany it with the complete corresponding machine-readable 166 source code, which must be distributed under the terms of Sections 167 1 and 2 above on a medium customarily used for software interchange; or, 168 169 b) Accompany it with a written offer, valid for at least three 170 years, to give any third party, for a charge no more than your 171 cost of physically performing source distribution, a complete 172 machine-readable copy of the corresponding source code, to be 173 distributed under the terms of Sections 1 and 2 above on a medium 174 customarily used for software interchange; or, 175 176 c) Accompany it with the information you received as to the offer 177 to distribute corresponding source code. (This alternative is 178 allowed only for noncommercial distribution and only if you 179 received the program in object code or executable form with such 180 an offer, in accord with Subsection b above.) 181 182The source code for a work means the preferred form of the work for 183making modifications to it. For an executable work, complete source 184code means all the source code for all modules it contains, plus any 185associated interface definition files, plus the scripts used to 186control compilation and installation of the executable. However, as a 187special exception, the source code distributed need not include 188anything that is normally distributed (in either source or binary 189form) with the major components (compiler, kernel, and so on) of the 190operating system on which the executable runs, unless that component 191itself accompanies the executable. 192 193If distribution of executable or object code is made by offering 194access to copy from a designated place, then offering equivalent 195access to copy the source code from the same place counts as 196distribution of the source code, even though third parties are not 197compelled to copy the source along with the object code. 198 199 4. You may not copy, modify, sublicense, or distribute the Program 200except as expressly provided under this License. Any attempt 201otherwise to copy, modify, sublicense or distribute the Program is 202void, and will automatically terminate your rights under this License. 203However, parties who have received copies, or rights, from you under 204this License will not have their licenses terminated so long as such 205parties remain in full compliance. 206 207 5. You are not required to accept this License, since you have not 208signed it. However, nothing else grants you permission to modify or 209distribute the Program or its derivative works. These actions are 210prohibited by law if you do not accept this License. Therefore, by 211modifying or distributing the Program (or any work based on the 212Program), you indicate your acceptance of this License to do so, and 213all its terms and conditions for copying, distributing or modifying 214the Program or works based on it. 215 216 6. Each time you redistribute the Program (or any work based on the 217Program), the recipient automatically receives a license from the 218original licensor to copy, distribute or modify the Program subject to 219these terms and conditions. You may not impose any further 220restrictions on the recipients' exercise of the rights granted herein. 221You are not responsible for enforcing compliance by third parties to 222this License. 223 224 7. If, as a consequence of a court judgment or allegation of patent 225infringement or for any other reason (not limited to patent issues), 226conditions are imposed on you (whether by court order, agreement or 227otherwise) that contradict the conditions of this License, they do not 228excuse you from the conditions of this License. If you cannot 229distribute so as to satisfy simultaneously your obligations under this 230License and any other pertinent obligations, then as a consequence you 231may not distribute the Program at all. For example, if a patent 232license would not permit royalty-free redistribution of the Program by 233all those who receive copies directly or indirectly through you, then 234the only way you could satisfy both it and this License would be to 235refrain entirely from distribution of the Program. 236 237If any portion of this section is held invalid or unenforceable under 238any particular circumstance, the balance of the section is intended to 239apply and the section as a whole is intended to apply in other 240circumstances. 241 242It is not the purpose of this section to induce you to infringe any 243patents or other property right claims or to contest validity of any 244such claims; this section has the sole purpose of protecting the 245integrity of the free software distribution system, which is 246implemented by public license practices. Many people have made 247generous contributions to the wide range of software distributed 248through that system in reliance on consistent application of that 249system; it is up to the author/donor to decide if he or she is willing 250to distribute software through any other system and a licensee cannot 251impose that choice. 252 253This section is intended to make thoroughly clear what is believed to 254be a consequence of the rest of this License. 255 256 8. If the distribution and/or use of the Program is restricted in 257certain countries either by patents or by copyrighted interfaces, the 258original copyright holder who places the Program under this License 259may add an explicit geographical distribution limitation excluding 260those countries, so that distribution is permitted only in or among 261countries not thus excluded. In such case, this License incorporates 262the limitation as if written in the body of this License. 263 264 9. The Free Software Foundation may publish revised and/or new versions 265of the General Public License from time to time. Such new versions will 266be similar in spirit to the present version, but may differ in detail to 267address new problems or concerns. 268 269Each version is given a distinguishing version number. If the Program 270specifies a version number of this License which applies to it and "any 271later version", you have the option of following the terms and conditions 272either of that version or of any later version published by the Free 273Software Foundation. If the Program does not specify a version number of 274this License, you may choose any version ever published by the Free Software 275Foundation. 276 277 10. If you wish to incorporate parts of the Program into other free 278programs whose distribution conditions are different, write to the author 279to ask for permission. For software which is copyrighted by the Free 280Software Foundation, write to the Free Software Foundation; we sometimes 281make exceptions for this. Our decision will be guided by the two goals 282of preserving the free status of all derivatives of our free software and 283of promoting the sharing and reuse of software generally. 284 285 NO WARRANTY 286 287 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 288FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 289OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 290PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 291OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 292MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 293TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 294PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 295REPAIR OR CORRECTION. 296 297 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 298WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 299REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 300INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 301OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 302TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 303YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 304PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 305POSSIBILITY OF SUCH DAMAGES. 306 307 END OF TERMS AND CONDITIONS 308 309 How to Apply These Terms to Your New Programs 310 311 If you develop a new program, and you want it to be of the greatest 312possible use to the public, the best way to achieve this is to make it 313free software which everyone can redistribute and change under these terms. 314 315 To do so, attach the following notices to the program. It is safest 316to attach them to the start of each source file to most effectively 317convey the exclusion of warranty; and each file should have at least 318the "copyright" line and a pointer to where the full notice is found. 319 320 <one line to give the program's name and a brief idea of what it does.> 321 Copyright (C) <year> <name of author> 322 323 This program is free software; you can redistribute it and/or modify 324 it under the terms of the GNU General Public License as published by 325 the Free Software Foundation; either version 2 of the License, or 326 (at your option) any later version. 327 328 This program is distributed in the hope that it will be useful, 329 but WITHOUT ANY WARRANTY; without even the implied warranty of 330 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 331 GNU General Public License for more details. 332 333 You should have received a copy of the GNU General Public License 334 along with this program; If not, see <http://www.gnu.org/licenses/>. 335 336 337Also add information on how to contact you by electronic and paper mail. 338 339If the program is interactive, make it output a short notice like this 340when it starts in an interactive mode: 341 342 Gnomovision version 69, Copyright (C) year name of author 343 Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 344 This is free software, and you are welcome to redistribute it 345 under certain conditions; type `show c' for details. 346 347The hypothetical commands `show w' and `show c' should show the appropriate 348parts of the General Public License. Of course, the commands you use may 349be called something other than `show w' and `show c'; they could even be 350mouse-clicks or menu items--whatever suits your program. 351 352You should also get your employer (if you work as a programmer) or your 353school, if any, to sign a "copyright disclaimer" for the program, if 354necessary. Here is a sample; alter the names: 355 356 Yoyodyne, Inc., hereby disclaims all copyright interest in the program 357 `Gnomovision' (which makes passes at compilers) written by James Hacker. 358 359 <signature of Ty Coon>, 1 April 1989 360 Ty Coon, President of Vice 361 362This General Public License does not permit incorporating your program into 363proprietary programs. If your program is a subroutine library, you may 364consider it more useful to permit linking proprietary applications with the 365library. If this is what you want to do, use the GNU Library General 366Public License instead of this License. 367