1*53ee8cc1Swenshuai.xi GNU GENERAL PUBLIC LICENSE 2*53ee8cc1Swenshuai.xi Version 2, June 1991 3*53ee8cc1Swenshuai.xi 4*53ee8cc1Swenshuai.xi Copyright (C) 1989, 1991 Free Software Foundation, Inc. 5*53ee8cc1Swenshuai.xi 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6*53ee8cc1Swenshuai.xi Everyone is permitted to copy and distribute verbatim copies 7*53ee8cc1Swenshuai.xi of this license document, but changing it is not allowed. 8*53ee8cc1Swenshuai.xi 9*53ee8cc1Swenshuai.xi Preamble 10*53ee8cc1Swenshuai.xi 11*53ee8cc1Swenshuai.xi The licenses for most software are designed to take away your 12*53ee8cc1Swenshuai.xifreedom to share and change it. By contrast, the GNU General Public 13*53ee8cc1Swenshuai.xiLicense is intended to guarantee your freedom to share and change free 14*53ee8cc1Swenshuai.xisoftware--to make sure the software is free for all its users. This 15*53ee8cc1Swenshuai.xiGeneral Public License applies to most of the Free Software 16*53ee8cc1Swenshuai.xiFoundation's software and to any other program whose authors commit to 17*53ee8cc1Swenshuai.xiusing it. (Some other Free Software Foundation software is covered by 18*53ee8cc1Swenshuai.xithe GNU Library General Public License instead.) You can apply it to 19*53ee8cc1Swenshuai.xiyour programs, too. 20*53ee8cc1Swenshuai.xi 21*53ee8cc1Swenshuai.xi When we speak of free software, we are referring to freedom, not 22*53ee8cc1Swenshuai.xiprice. Our General Public Licenses are designed to make sure that you 23*53ee8cc1Swenshuai.xihave the freedom to distribute copies of free software (and charge for 24*53ee8cc1Swenshuai.xithis service if you wish), that you receive source code or can get it 25*53ee8cc1Swenshuai.xiif you want it, that you can change the software or use pieces of it 26*53ee8cc1Swenshuai.xiin new free programs; and that you know you can do these things. 27*53ee8cc1Swenshuai.xi 28*53ee8cc1Swenshuai.xi To protect your rights, we need to make restrictions that forbid 29*53ee8cc1Swenshuai.xianyone to deny you these rights or to ask you to surrender the rights. 30*53ee8cc1Swenshuai.xiThese restrictions translate to certain responsibilities for you if you 31*53ee8cc1Swenshuai.xidistribute copies of the software, or if you modify it. 32*53ee8cc1Swenshuai.xi 33*53ee8cc1Swenshuai.xi For example, if you distribute copies of such a program, whether 34*53ee8cc1Swenshuai.xigratis or for a fee, you must give the recipients all the rights that 35*53ee8cc1Swenshuai.xiyou have. You must make sure that they, too, receive or can get the 36*53ee8cc1Swenshuai.xisource code. And you must show them these terms so they know their 37*53ee8cc1Swenshuai.xirights. 38*53ee8cc1Swenshuai.xi 39*53ee8cc1Swenshuai.xi We protect your rights with two steps: (1) copyright the software, and 40*53ee8cc1Swenshuai.xi(2) offer you this license which gives you legal permission to copy, 41*53ee8cc1Swenshuai.xidistribute and/or modify the software. 42*53ee8cc1Swenshuai.xi 43*53ee8cc1Swenshuai.xi Also, for each author's protection and ours, we want to make certain 44*53ee8cc1Swenshuai.xithat everyone understands that there is no warranty for this free 45*53ee8cc1Swenshuai.xisoftware. If the software is modified by someone else and passed on, we 46*53ee8cc1Swenshuai.xiwant its recipients to know that what they have is not the original, so 47*53ee8cc1Swenshuai.xithat any problems introduced by others will not reflect on the original 48*53ee8cc1Swenshuai.xiauthors' reputations. 49*53ee8cc1Swenshuai.xi 50*53ee8cc1Swenshuai.xi Finally, any free program is threatened constantly by software 51*53ee8cc1Swenshuai.xipatents. We wish to avoid the danger that redistributors of a free 52*53ee8cc1Swenshuai.xiprogram will individually obtain patent licenses, in effect making the 53*53ee8cc1Swenshuai.xiprogram proprietary. To prevent this, we have made it clear that any 54*53ee8cc1Swenshuai.xipatent must be licensed for everyone's free use or not licensed at all. 55*53ee8cc1Swenshuai.xi 56*53ee8cc1Swenshuai.xi The precise terms and conditions for copying, distribution and 57*53ee8cc1Swenshuai.ximodification follow. 58*53ee8cc1Swenshuai.xi 59*53ee8cc1Swenshuai.xi GNU GENERAL PUBLIC LICENSE 60*53ee8cc1Swenshuai.xi TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 61*53ee8cc1Swenshuai.xi 62*53ee8cc1Swenshuai.xi 0. This License applies to any program or other work which contains 63*53ee8cc1Swenshuai.xia notice placed by the copyright holder saying it may be distributed 64*53ee8cc1Swenshuai.xiunder the terms of this General Public License. The "Program", below, 65*53ee8cc1Swenshuai.xirefers to any such program or work, and a "work based on the Program" 66*53ee8cc1Swenshuai.ximeans either the Program or any derivative work under copyright law: 67*53ee8cc1Swenshuai.xithat is to say, a work containing the Program or a portion of it, 68*53ee8cc1Swenshuai.xieither verbatim or with modifications and/or translated into another 69*53ee8cc1Swenshuai.xilanguage. (Hereinafter, translation is included without limitation in 70*53ee8cc1Swenshuai.xithe term "modification".) Each licensee is addressed as "you". 71*53ee8cc1Swenshuai.xi 72*53ee8cc1Swenshuai.xiActivities other than copying, distribution and modification are not 73*53ee8cc1Swenshuai.xicovered by this License; they are outside its scope. The act of 74*53ee8cc1Swenshuai.xirunning the Program is not restricted, and the output from the Program 75*53ee8cc1Swenshuai.xiis covered only if its contents constitute a work based on the 76*53ee8cc1Swenshuai.xiProgram (independent of having been made by running the Program). 77*53ee8cc1Swenshuai.xiWhether that is true depends on what the Program does. 78*53ee8cc1Swenshuai.xi 79*53ee8cc1Swenshuai.xi 1. You may copy and distribute verbatim copies of the Program's 80*53ee8cc1Swenshuai.xisource code as you receive it, in any medium, provided that you 81*53ee8cc1Swenshuai.xiconspicuously and appropriately publish on each copy an appropriate 82*53ee8cc1Swenshuai.xicopyright notice and disclaimer of warranty; keep intact all the 83*53ee8cc1Swenshuai.xinotices that refer to this License and to the absence of any warranty; 84*53ee8cc1Swenshuai.xiand give any other recipients of the Program a copy of this License 85*53ee8cc1Swenshuai.xialong with the Program. 86*53ee8cc1Swenshuai.xi 87*53ee8cc1Swenshuai.xiYou may charge a fee for the physical act of transferring a copy, and 88*53ee8cc1Swenshuai.xiyou may at your option offer warranty protection in exchange for a fee. 89*53ee8cc1Swenshuai.xi 90*53ee8cc1Swenshuai.xi 2. You may modify your copy or copies of the Program or any portion 91*53ee8cc1Swenshuai.xiof it, thus forming a work based on the Program, and copy and 92*53ee8cc1Swenshuai.xidistribute such modifications or work under the terms of Section 1 93*53ee8cc1Swenshuai.xiabove, provided that you also meet all of these conditions: 94*53ee8cc1Swenshuai.xi 95*53ee8cc1Swenshuai.xi a) You must cause the modified files to carry prominent notices 96*53ee8cc1Swenshuai.xi stating that you changed the files and the date of any change. 97*53ee8cc1Swenshuai.xi 98*53ee8cc1Swenshuai.xi b) You must cause any work that you distribute or publish, that in 99*53ee8cc1Swenshuai.xi whole or in part contains or is derived from the Program or any 100*53ee8cc1Swenshuai.xi part thereof, to be licensed as a whole at no charge to all third 101*53ee8cc1Swenshuai.xi parties under the terms of this License. 102*53ee8cc1Swenshuai.xi 103*53ee8cc1Swenshuai.xi c) If the modified program normally reads commands interactively 104*53ee8cc1Swenshuai.xi when run, you must cause it, when started running for such 105*53ee8cc1Swenshuai.xi interactive use in the most ordinary way, to print or display an 106*53ee8cc1Swenshuai.xi announcement including an appropriate copyright notice and a 107*53ee8cc1Swenshuai.xi notice that there is no warranty (or else, saying that you provide 108*53ee8cc1Swenshuai.xi a warranty) and that users may redistribute the program under 109*53ee8cc1Swenshuai.xi these conditions, and telling the user how to view a copy of this 110*53ee8cc1Swenshuai.xi License. (Exception: if the Program itself is interactive but 111*53ee8cc1Swenshuai.xi does not normally print such an announcement, your work based on 112*53ee8cc1Swenshuai.xi the Program is not required to print an announcement.) 113*53ee8cc1Swenshuai.xi 114*53ee8cc1Swenshuai.xiThese requirements apply to the modified work as a whole. If 115*53ee8cc1Swenshuai.xiidentifiable sections of that work are not derived from the Program, 116*53ee8cc1Swenshuai.xiand can be reasonably considered independent and separate works in 117*53ee8cc1Swenshuai.xithemselves, then this License, and its terms, do not apply to those 118*53ee8cc1Swenshuai.xisections when you distribute them as separate works. But when you 119*53ee8cc1Swenshuai.xidistribute the same sections as part of a whole which is a work based 120*53ee8cc1Swenshuai.xion the Program, the distribution of the whole must be on the terms of 121*53ee8cc1Swenshuai.xithis License, whose permissions for other licensees extend to the 122*53ee8cc1Swenshuai.xientire whole, and thus to each and every part regardless of who wrote it. 123*53ee8cc1Swenshuai.xi 124*53ee8cc1Swenshuai.xiThus, it is not the intent of this section to claim rights or contest 125*53ee8cc1Swenshuai.xiyour rights to work written entirely by you; rather, the intent is to 126*53ee8cc1Swenshuai.xiexercise the right to control the distribution of derivative or 127*53ee8cc1Swenshuai.xicollective works based on the Program. 128*53ee8cc1Swenshuai.xi 129*53ee8cc1Swenshuai.xiIn addition, mere aggregation of another work not based on the Program 130*53ee8cc1Swenshuai.xiwith the Program (or with a work based on the Program) on a volume of 131*53ee8cc1Swenshuai.xia storage or distribution medium does not bring the other work under 132*53ee8cc1Swenshuai.xithe scope of this License. 133*53ee8cc1Swenshuai.xi 134*53ee8cc1Swenshuai.xi 3. You may copy and distribute the Program (or a work based on it, 135*53ee8cc1Swenshuai.xiunder Section 2) in object code or executable form under the terms of 136*53ee8cc1Swenshuai.xiSections 1 and 2 above provided that you also do one of the following: 137*53ee8cc1Swenshuai.xi 138*53ee8cc1Swenshuai.xi a) Accompany it with the complete corresponding machine-readable 139*53ee8cc1Swenshuai.xi source code, which must be distributed under the terms of Sections 140*53ee8cc1Swenshuai.xi 1 and 2 above on a medium customarily used for software interchange; or, 141*53ee8cc1Swenshuai.xi 142*53ee8cc1Swenshuai.xi b) Accompany it with a written offer, valid for at least three 143*53ee8cc1Swenshuai.xi years, to give any third party, for a charge no more than your 144*53ee8cc1Swenshuai.xi cost of physically performing source distribution, a complete 145*53ee8cc1Swenshuai.xi machine-readable copy of the corresponding source code, to be 146*53ee8cc1Swenshuai.xi distributed under the terms of Sections 1 and 2 above on a medium 147*53ee8cc1Swenshuai.xi customarily used for software interchange; or, 148*53ee8cc1Swenshuai.xi 149*53ee8cc1Swenshuai.xi c) Accompany it with the information you received as to the offer 150*53ee8cc1Swenshuai.xi to distribute corresponding source code. (This alternative is 151*53ee8cc1Swenshuai.xi allowed only for noncommercial distribution and only if you 152*53ee8cc1Swenshuai.xi received the program in object code or executable form with such 153*53ee8cc1Swenshuai.xi an offer, in accord with Subsection b above.) 154*53ee8cc1Swenshuai.xi 155*53ee8cc1Swenshuai.xiThe source code for a work means the preferred form of the work for 156*53ee8cc1Swenshuai.ximaking modifications to it. For an executable work, complete source 157*53ee8cc1Swenshuai.xicode means all the source code for all modules it contains, plus any 158*53ee8cc1Swenshuai.xiassociated interface definition files, plus the scripts used to 159*53ee8cc1Swenshuai.xicontrol compilation and installation of the executable. However, as a 160*53ee8cc1Swenshuai.xispecial exception, the source code distributed need not include 161*53ee8cc1Swenshuai.xianything that is normally distributed (in either source or binary 162*53ee8cc1Swenshuai.xiform) with the major components (compiler, kernel, and so on) of the 163*53ee8cc1Swenshuai.xioperating system on which the executable runs, unless that component 164*53ee8cc1Swenshuai.xiitself accompanies the executable. 165*53ee8cc1Swenshuai.xi 166*53ee8cc1Swenshuai.xiIf distribution of executable or object code is made by offering 167*53ee8cc1Swenshuai.xiaccess to copy from a designated place, then offering equivalent 168*53ee8cc1Swenshuai.xiaccess to copy the source code from the same place counts as 169*53ee8cc1Swenshuai.xidistribution of the source code, even though third parties are not 170*53ee8cc1Swenshuai.xicompelled to copy the source along with the object code. 171*53ee8cc1Swenshuai.xi 172*53ee8cc1Swenshuai.xi 4. You may not copy, modify, sublicense, or distribute the Program 173*53ee8cc1Swenshuai.xiexcept as expressly provided under this License. Any attempt 174*53ee8cc1Swenshuai.xiotherwise to copy, modify, sublicense or distribute the Program is 175*53ee8cc1Swenshuai.xivoid, and will automatically terminate your rights under this License. 176*53ee8cc1Swenshuai.xiHowever, parties who have received copies, or rights, from you under 177*53ee8cc1Swenshuai.xithis License will not have their licenses terminated so long as such 178*53ee8cc1Swenshuai.xiparties remain in full compliance. 179*53ee8cc1Swenshuai.xi 180*53ee8cc1Swenshuai.xi 5. You are not required to accept this License, since you have not 181*53ee8cc1Swenshuai.xisigned it. However, nothing else grants you permission to modify or 182*53ee8cc1Swenshuai.xidistribute the Program or its derivative works. These actions are 183*53ee8cc1Swenshuai.xiprohibited by law if you do not accept this License. Therefore, by 184*53ee8cc1Swenshuai.ximodifying or distributing the Program (or any work based on the 185*53ee8cc1Swenshuai.xiProgram), you indicate your acceptance of this License to do so, and 186*53ee8cc1Swenshuai.xiall its terms and conditions for copying, distributing or modifying 187*53ee8cc1Swenshuai.xithe Program or works based on it. 188*53ee8cc1Swenshuai.xi 189*53ee8cc1Swenshuai.xi 6. Each time you redistribute the Program (or any work based on the 190*53ee8cc1Swenshuai.xiProgram), the recipient automatically receives a license from the 191*53ee8cc1Swenshuai.xioriginal licensor to copy, distribute or modify the Program subject to 192*53ee8cc1Swenshuai.xithese terms and conditions. You may not impose any further 193*53ee8cc1Swenshuai.xirestrictions on the recipients' exercise of the rights granted herein. 194*53ee8cc1Swenshuai.xiYou are not responsible for enforcing compliance by third parties to 195*53ee8cc1Swenshuai.xithis License. 196*53ee8cc1Swenshuai.xi 197*53ee8cc1Swenshuai.xi 7. If, as a consequence of a court judgment or allegation of patent 198*53ee8cc1Swenshuai.xiinfringement or for any other reason (not limited to patent issues), 199*53ee8cc1Swenshuai.xiconditions are imposed on you (whether by court order, agreement or 200*53ee8cc1Swenshuai.xiotherwise) that contradict the conditions of this License, they do not 201*53ee8cc1Swenshuai.xiexcuse you from the conditions of this License. If you cannot 202*53ee8cc1Swenshuai.xidistribute so as to satisfy simultaneously your obligations under this 203*53ee8cc1Swenshuai.xiLicense and any other pertinent obligations, then as a consequence you 204*53ee8cc1Swenshuai.ximay not distribute the Program at all. For example, if a patent 205*53ee8cc1Swenshuai.xilicense would not permit royalty-free redistribution of the Program by 206*53ee8cc1Swenshuai.xiall those who receive copies directly or indirectly through you, then 207*53ee8cc1Swenshuai.xithe only way you could satisfy both it and this License would be to 208*53ee8cc1Swenshuai.xirefrain entirely from distribution of the Program. 209*53ee8cc1Swenshuai.xi 210*53ee8cc1Swenshuai.xiIf any portion of this section is held invalid or unenforceable under 211*53ee8cc1Swenshuai.xiany particular circumstance, the balance of the section is intended to 212*53ee8cc1Swenshuai.xiapply and the section as a whole is intended to apply in other 213*53ee8cc1Swenshuai.xicircumstances. 214*53ee8cc1Swenshuai.xi 215*53ee8cc1Swenshuai.xiIt is not the purpose of this section to induce you to infringe any 216*53ee8cc1Swenshuai.xipatents or other property right claims or to contest validity of any 217*53ee8cc1Swenshuai.xisuch claims; this section has the sole purpose of protecting the 218*53ee8cc1Swenshuai.xiintegrity of the free software distribution system, which is 219*53ee8cc1Swenshuai.xiimplemented by public license practices. Many people have made 220*53ee8cc1Swenshuai.xigenerous contributions to the wide range of software distributed 221*53ee8cc1Swenshuai.xithrough that system in reliance on consistent application of that 222*53ee8cc1Swenshuai.xisystem; it is up to the author/donor to decide if he or she is willing 223*53ee8cc1Swenshuai.xito distribute software through any other system and a licensee cannot 224*53ee8cc1Swenshuai.xiimpose that choice. 225*53ee8cc1Swenshuai.xi 226*53ee8cc1Swenshuai.xiThis section is intended to make thoroughly clear what is believed to 227*53ee8cc1Swenshuai.xibe a consequence of the rest of this License. 228*53ee8cc1Swenshuai.xi 229*53ee8cc1Swenshuai.xi 8. If the distribution and/or use of the Program is restricted in 230*53ee8cc1Swenshuai.xicertain countries either by patents or by copyrighted interfaces, the 231*53ee8cc1Swenshuai.xioriginal copyright holder who places the Program under this License 232*53ee8cc1Swenshuai.ximay add an explicit geographical distribution limitation excluding 233*53ee8cc1Swenshuai.xithose countries, so that distribution is permitted only in or among 234*53ee8cc1Swenshuai.xicountries not thus excluded. In such case, this License incorporates 235*53ee8cc1Swenshuai.xithe limitation as if written in the body of this License. 236*53ee8cc1Swenshuai.xi 237*53ee8cc1Swenshuai.xi 9. The Free Software Foundation may publish revised and/or new versions 238*53ee8cc1Swenshuai.xiof the General Public License from time to time. Such new versions will 239*53ee8cc1Swenshuai.xibe similar in spirit to the present version, but may differ in detail to 240*53ee8cc1Swenshuai.xiaddress new problems or concerns. 241*53ee8cc1Swenshuai.xi 242*53ee8cc1Swenshuai.xiEach version is given a distinguishing version number. If the Program 243*53ee8cc1Swenshuai.xispecifies a version number of this License which applies to it and "any 244*53ee8cc1Swenshuai.xilater version", you have the option of following the terms and conditions 245*53ee8cc1Swenshuai.xieither of that version or of any later version published by the Free 246*53ee8cc1Swenshuai.xiSoftware Foundation. If the Program does not specify a version number of 247*53ee8cc1Swenshuai.xithis License, you may choose any version ever published by the Free Software 248*53ee8cc1Swenshuai.xiFoundation. 249*53ee8cc1Swenshuai.xi 250*53ee8cc1Swenshuai.xi 10. If you wish to incorporate parts of the Program into other free 251*53ee8cc1Swenshuai.xiprograms whose distribution conditions are different, write to the author 252*53ee8cc1Swenshuai.xito ask for permission. For software which is copyrighted by the Free 253*53ee8cc1Swenshuai.xiSoftware Foundation, write to the Free Software Foundation; we sometimes 254*53ee8cc1Swenshuai.ximake exceptions for this. Our decision will be guided by the two goals 255*53ee8cc1Swenshuai.xiof preserving the free status of all derivatives of our free software and 256*53ee8cc1Swenshuai.xiof promoting the sharing and reuse of software generally. 257*53ee8cc1Swenshuai.xi 258*53ee8cc1Swenshuai.xi NO WARRANTY 259*53ee8cc1Swenshuai.xi 260*53ee8cc1Swenshuai.xi 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 261*53ee8cc1Swenshuai.xiFOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 262*53ee8cc1Swenshuai.xiOTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 263*53ee8cc1Swenshuai.xiPROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 264*53ee8cc1Swenshuai.xiOR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 265*53ee8cc1Swenshuai.xiMERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 266*53ee8cc1Swenshuai.xiTO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 267*53ee8cc1Swenshuai.xiPROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 268*53ee8cc1Swenshuai.xiREPAIR OR CORRECTION. 269*53ee8cc1Swenshuai.xi 270*53ee8cc1Swenshuai.xi 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271*53ee8cc1Swenshuai.xiWILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272*53ee8cc1Swenshuai.xiREDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273*53ee8cc1Swenshuai.xiINCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274*53ee8cc1Swenshuai.xiOUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275*53ee8cc1Swenshuai.xiTO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276*53ee8cc1Swenshuai.xiYOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277*53ee8cc1Swenshuai.xiPROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278*53ee8cc1Swenshuai.xiPOSSIBILITY OF SUCH DAMAGES. 279*53ee8cc1Swenshuai.xi 280*53ee8cc1Swenshuai.xi END OF TERMS AND CONDITIONS 281*53ee8cc1Swenshuai.xi 282*53ee8cc1Swenshuai.xi How to Apply These Terms to Your New Programs 283*53ee8cc1Swenshuai.xi 284*53ee8cc1Swenshuai.xi If you develop a new program, and you want it to be of the greatest 285*53ee8cc1Swenshuai.xipossible use to the public, the best way to achieve this is to make it 286*53ee8cc1Swenshuai.xifree software which everyone can redistribute and change under these terms. 287*53ee8cc1Swenshuai.xi 288*53ee8cc1Swenshuai.xi To do so, attach the following notices to the program. It is safest 289*53ee8cc1Swenshuai.xito attach them to the start of each source file to most effectively 290*53ee8cc1Swenshuai.xiconvey the exclusion of warranty; and each file should have at least 291*53ee8cc1Swenshuai.xithe "copyright" line and a pointer to where the full notice is found. 292*53ee8cc1Swenshuai.xi 293*53ee8cc1Swenshuai.xi <one line to give the program's name and a brief idea of what it does.> 294*53ee8cc1Swenshuai.xi Copyright (C) <year> <name of author> 295*53ee8cc1Swenshuai.xi 296*53ee8cc1Swenshuai.xi This program is free software; you can redistribute it and/or modify 297*53ee8cc1Swenshuai.xi it under the terms of the GNU General Public License as published by 298*53ee8cc1Swenshuai.xi the Free Software Foundation; either version 2 of the License, or 299*53ee8cc1Swenshuai.xi (at your option) any later version. 300*53ee8cc1Swenshuai.xi 301*53ee8cc1Swenshuai.xi This program is distributed in the hope that it will be useful, 302*53ee8cc1Swenshuai.xi but WITHOUT ANY WARRANTY; without even the implied warranty of 303*53ee8cc1Swenshuai.xi MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304*53ee8cc1Swenshuai.xi GNU General Public License for more details. 305*53ee8cc1Swenshuai.xi 306*53ee8cc1Swenshuai.xi You should have received a copy of the GNU General Public License 307*53ee8cc1Swenshuai.xi along with this program; if not, write to the Free Software 308*53ee8cc1Swenshuai.xi Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 309*53ee8cc1Swenshuai.xi 310*53ee8cc1Swenshuai.xi 311*53ee8cc1Swenshuai.xiAlso add information on how to contact you by electronic and paper mail. 312*53ee8cc1Swenshuai.xi 313*53ee8cc1Swenshuai.xiIf the program is interactive, make it output a short notice like this 314*53ee8cc1Swenshuai.xiwhen it starts in an interactive mode: 315*53ee8cc1Swenshuai.xi 316*53ee8cc1Swenshuai.xi Gnomovision version 69, Copyright (C) year name of author 317*53ee8cc1Swenshuai.xi Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 318*53ee8cc1Swenshuai.xi This is free software, and you are welcome to redistribute it 319*53ee8cc1Swenshuai.xi under certain conditions; type `show c' for details. 320*53ee8cc1Swenshuai.xi 321*53ee8cc1Swenshuai.xiThe hypothetical commands `show w' and `show c' should show the appropriate 322*53ee8cc1Swenshuai.xiparts of the General Public License. Of course, the commands you use may 323*53ee8cc1Swenshuai.xibe called something other than `show w' and `show c'; they could even be 324*53ee8cc1Swenshuai.ximouse-clicks or menu items--whatever suits your program. 325*53ee8cc1Swenshuai.xi 326*53ee8cc1Swenshuai.xiYou should also get your employer (if you work as a programmer) or your 327*53ee8cc1Swenshuai.xischool, if any, to sign a "copyright disclaimer" for the program, if 328*53ee8cc1Swenshuai.xinecessary. Here is a sample; alter the names: 329*53ee8cc1Swenshuai.xi 330*53ee8cc1Swenshuai.xi Yoyodyne, Inc., hereby disclaims all copyright interest in the program 331*53ee8cc1Swenshuai.xi `Gnomovision' (which makes passes at compilers) written by James Hacker. 332*53ee8cc1Swenshuai.xi 333*53ee8cc1Swenshuai.xi <signature of Ty Coon>, 1 April 1989 334*53ee8cc1Swenshuai.xi Ty Coon, President of Vice 335*53ee8cc1Swenshuai.xi 336*53ee8cc1Swenshuai.xiThis General Public License does not permit incorporating your program into 337*53ee8cc1Swenshuai.xiproprietary programs. If your program is a subroutine library, you may 338*53ee8cc1Swenshuai.xiconsider it more useful to permit linking proprietary applications with the 339*53ee8cc1Swenshuai.xilibrary. If this is what you want to do, use the GNU Library General 340*53ee8cc1Swenshuai.xiPublic License instead of this License. 341*53ee8cc1Swenshuai.xi 342