[issue4944] os.fsync() doesn't work as expect in Windows

[Emil Styrke]

Emil Styrke added the comment:

eryksun, thank you for the explanation, the penny finally dropped for me.  It's the *other* child processes that keep the file open, not the parent.  Actually this bug started hitting me after I *stopped* doing exactly what you suggest (fdopen on the temp file), and instead started using file names generated by my program (opened with regular "open") and now I see why that is.  If I use os.fdopen with the O_NOINHERIT flag, it works as expected.

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<http://bugs.python.org/issue4944>
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