[issue4915] Port sysmodule.c to MS Windows CE

[Martin v. Löwis]

Martin v. Löwis <martin at v.loewis.de> added the comment:

> I don't really know what happens when you try to read()/fread() from 
> stdin that is a directory, but I guess it will fail quickly even 
> without an explicit check by Python.

Without the explicit check, the interpreter crashed; this was the
reason to add the check in the first place. See issue 887946.

> A directory can be opened under 
> win32 just like a file, so I guess that you could also set one as 
> stdin for a process. 

I just tried to run

python.exe < c:\python25

on W2k3, and get "Access denied" (instead of getting the error
message of the Python interpreter). Indeed, it is apparently
*not* possible to open a directory just like a file under win32.
As

http://msdn.microsoft.com/en-us/library/aa363858(VS.85).aspx

explains: you must pass FILE_FLAG_BACKUP_SEMANTICS, which
you normally don't pass.

Not sure whether this all applies to CE, though.

> All in all, I don't care whether the check is 
> made or not, but it doesn't hurt to be there either.

It does hurt. It clutters the code. So if it could be determined
that you can't open a directory at all with CreateFile on
Windows CE, then it would be better if the block was removed,
than fixed.

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