rename() cannot replace the file which is opened with writable access

[Masamichi Hosoda]

>> I've found that rename() cannot replace the file
>> which is opened with writable access on Cygwin.
>> On Linux, it works.
> 
> It is OS dependent behavior, and vary even on same OS.
> Windows may let you rename a file, or may not, depends on how exactly it is
> opened.

Thank you for your answer.

If I understand correctly,
POSIX behavior should be able to replace the writable opened file by rename().
But, It does not work on my Cygwin environment.

Is it no problem if Cygwin's behavior is different from POSIX behavior?
If so, we need different application handling for Cygwin and POSIX.

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