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an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that re- fer 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 op- tion offer warranty protection in exchange for
afee.
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 dis- tribute or publish, that in whole or in part con- tains 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 inter- active use in the most ordinary way, to print or display an announcement including an ap- propriate 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 announce- ment, 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 de- rived 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 distrib-
ute the same sections as part of a whole which is a work based on the Program, the distribu- tion 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 en- tirely 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 ob- ject 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 corre- sponding
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 physi- cally performing source distribution, a complete
c)Accompany it with the information you re- ceived as to the offer to distribute correspond- ing source code. (This alternative is allowed only for noncommercial distribution and only if you received the program in object code or ex- ecutable 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 defini-
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