Re: modification of zlib/libpng license, is this legally usable?

[Anders Bergh]

Right, thanks alot. Would this apply to usage within eg. RHEL? What I
don't want is eg. someone to get it, implement it in their program, and
then sell it without permission.

On Sat, 2005-04-30 at 19:47 +0800, Wei Mingzhi wrote:
 This is okay as long as you don't call the result as
 ZLib/libpng License, but always note that any
 restrictions like the 4th clause will render the
 program non-free!
 
 --- Anders Bergh [EMAIL PROTECTED] writes:
  Hi
  
  I've modified the zlib/libpng license to be a bit
  more restrictive for commercial usage.. I would like
  to get some feedback, and I also wonder if it's
  legally usable.
  
  LICENSE
  
  Copyright (c) year copyright holders
  
  This software is provided 'as-is', without any
  express or implied warranty.
  In no event will the authors be held liable for any
  damages arising from the
  use of this software.
  
  Permission is granted to anyone to use this software
  for any non-commercial
  purpose, and to alter it and redistribute it freely,
  subject to the following
  restrictions:
  
  1. The origin of this software must not be
  misrepresented; you must not
 claim that you wrote the original software.
  If you use this software in a
 product, an acknowledgment in the product
  documentation would be
 appreciated but is not required.
  
  2. Altered source versions must be plainly
  marked as such, and must not be
 misrepresented as being the original
  software.
  
  3. This notice may not be removed or altered
  from any source distribution.
  
  For commercial usage these restrictions applies
  aswell:
  
  4. You must have written permission by the
  respective copyright holders
 for using this software.
  
  5. The usage of this software must be
  acknowledged somewhere easily
 accessible for the end user, such as the
  about box or product
 documentation.
  
  /LICENSE
  
  Anders
  
  
 
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modification of zlib/libpng license, is this legally usable?

[Anders Bergh]

Hi
I've modified the zlib/libpng license to be a bit more restrictive for commercial usage.. 
I would like to get some feedback, and I also wonder if it's legally usable.
LICENSE
Copyright (c) year copyright holders
This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the
use of this software.
Permission is granted to anyone to use this software for any non-commercial
purpose, and to alter it and redistribute it freely, subject to the following
restrictions:
   1. The origin of this software must not be misrepresented; you must not
  claim that you wrote the original software. If you use this software in a
  product, an acknowledgment in the product documentation would be
  appreciated but is not required.
   2. Altered source versions must be plainly marked as such, and must not be
  misrepresented as being the original software.
   3. This notice may not be removed or altered from any source distribution.
For commercial usage these restrictions applies aswell:
   4. You must have written permission by the respective copyright holders
  for using this software.
   5. The usage of this software must be acknowledged somewhere easily
  accessible for the end user, such as the about box or product
  documentation.
/LICENSE
Anders
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