1GNU GENERAL PUBLIC LICENSE 2 3 Version 2, June 1991 4Copyright (C) 1989, 1991 Free Software Foundation, Inc. 559 Temple Place - Suite 330, Boston, MA 02111-1307, USA 6 7Everyone is permitted to copy and distribute verbatim copies 8of this license document, but changing it is not allowed. 9 10Preamble 11 12 The licenses for most software are designed to take away your freedom 13 to share and change it. By contrast, the GNU General Public License is 14 intended to guarantee your freedom to share and change free 15 software--to make sure the software is free for all its users. This 16 General Public License applies to most of the Free Software 17 Foundation's software and to any other program whose authors commit to 18 using it. (Some other Free Software Foundation software is covered by 19 the GNU Library General Public License instead.) You can apply it to 20 your programs, too. 21 22 When we speak of free software, we are referring to freedom, not 23 price. Our General Public Licenses are designed to make sure that you 24 have the freedom to distribute copies of free software (and charge for 25 this service if you wish), that you receive source code or can get it 26 if you want it, that you can change the software or use pieces of it 27 in new free programs; and that you know you can do these things. 28 29 To protect your rights, we need to make restrictions that forbid 30 anyone to deny you these rights or to ask you to surrender the rights. 31 These restrictions translate to certain responsibilities for you if 32 you distribute copies of the software, or if you modify it. 33 34 For example, if you distribute copies of such a program, whether 35 gratis or for a fee, you must give the recipients all the rights that 36 you have. You must make sure that they, too, receive or can get the 37 source code. And you must show them these terms so they know their 38 rights. 39 40 We protect your rights with two steps: (1) copyright the software, and 41 (2) offer you this license which gives you legal permission to copy, 42 distribute and/or modify the software. 43 44 Also, for each author's protection and ours, we want to make certain 45 that everyone understands that there is no warranty for this free 46 software. If the software is modified by someone else and passed on, 47 we want its recipients to know that what they have is not the 48 original, so that any problems introduced by others will not reflect 49 on the original authors' reputations. 50 51 Finally, any free program is threatened constantly by software 52 patents. We wish to avoid the danger that redistributors of a free 53 program will individually obtain patent licenses, in effect making the 54 program proprietary. To prevent this, we have made it clear that any 55 patent must be licensed for everyone's free use or not licensed at 56 all. 57 58 The precise terms and conditions for copying, distribution and 59 modification follow. 60 61TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 62 63 0. This License applies to any program or other work which contains a 64 notice placed by the copyright holder saying it may be distributed 65 under the terms of this General Public License. The "Program", below, 66 refers to any such program or work, and a "work based on the Program" 67 means either the Program or any derivative work under copyright law: 68 that is to say, a work containing the Program or a portion of it, 69 either verbatim or with modifications and/or translated into another 70 language. (Hereinafter, translation is included without limitation in 71 the term "modification".) Each licensee is addressed as "you". 72 73 Activities other than copying, distribution and modification are not 74 covered by this License; they are outside its scope. The act of 75 running the Program is not restricted, and the output from the Program 76 is covered only if its contents constitute a work based on the Program 77 (independent of having been made by running the Program). Whether that 78 is true depends on what the Program does. 79 80 1. You may copy and distribute verbatim copies of the Program's source 81 code as you receive it, in any medium, provided that you conspicuously 82 and appropriately publish on each copy an appropriate copyright notice 83 and disclaimer of warranty; keep intact all the notices that refer to 84 this License and to the absence of any warranty; and give any other 85 recipients of the Program a copy of this License along with the 86 Program. 87 88 You may charge a fee for the physical act of transferring a copy, and 89 you may at your option offer warranty protection in exchange for a 90 fee. 91 92 2. You may modify your copy or copies of the Program or any portion of 93 it, thus forming a work based on the Program, and copy and distribute 94 such modifications or work under the terms of Section 1 above, 95 provided that you also meet all of these conditions: 96 97 * a) You must cause the modified files to carry prominent notices 98 stating that you changed the files and the date of any change. 99 * b) You must cause any work that you distribute or publish, that in 100 whole or in part contains or is derived from the Program or any 101 part thereof, to be licensed as a whole at no charge to all third 102 parties under the terms of this License. 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 does 111 not normally print such an announcement, your work based on the 112 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 123 it. 124 125 Thus, it is not the intent of this section to claim rights or contest 126 your rights to work written entirely by you; rather, the intent is to 127 exercise the right to control the distribution of derivative or 128 collective works based on the Program. 129 130 In addition, mere aggregation of another work not based on the Program 131 with the Program (or with a work based on the Program) on a volume of 132 a storage or distribution medium does not bring the other work under 133 the scope of this License. 134 135 3. You may copy and distribute the Program (or a work based on it, 136 under Section 2) in object code or executable form under the terms of 137 Sections 1 and 2 above provided that you also do one of the following: 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 141 interchange; or, 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 * 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 otherwise 173 to copy, modify, sublicense or distribute the Program is void, and 174 will automatically terminate your rights under this License. However, 175 parties who have received copies, or rights, from you under this 176 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 237 versions of the General Public License from time to time. Such new 238 versions will be similar in spirit to the present version, but may 239 differ in detail to 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 243 "any later version", you have the option of following the terms and 244 conditions either of that version or of any later version published by 245 the Free Software Foundation. If the Program does not specify a 246 version number of this License, you may choose any version ever 247 published by the Free Software 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 251 author to ask for permission. For software which is copyrighted by the 252 Free Software Foundation, write to the Free Software Foundation; we 253 sometimes make exceptions for this. Our decision will be guided by the 254 two goals of preserving the free status of all derivatives of our free 255 software and 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 260 WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. 261 EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR 262 OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY 263 KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE 264 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 265 PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE 266 PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME 267 THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 268 269 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN 270 WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY 271 AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU 272 FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR 273 CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE 274 PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING 275 RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A 276 FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF 277 SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 278 DAMAGES. 279 280END OF TERMS AND CONDITIONS 281 282