Brian Curtin <cur...@acm.org> added the comment:

> The actual issue was initially detected when observing that the
> 'tarfile' package produced a tar containing different permissions,
> depending on the script being executed by 'cygwin python' or 'native python'.

I would expect that. Each of those work in their own world when it comes to 
file permissions, and there really isn't a 1-to-1 match when it comes to 
working in both environments.


On native Windows, "Read & Execute" has no real affect on applications, as it 
appears to be a synthetic permission probably constructed for that property 
window. I just looked at a number of definitely not executable files on my 
computer (e.g., text files), and they are all listed as "Read & Execute". Even 
by right clicking and adding a new file with a garbage name, no extension, and 
no contents, it's still "Read & Execute" enabled.

Additionally, there is no programmatic way to set that "Read & Execute" flag 
that you see in the property window.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10888>
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