Using 2.5 Sept 19, 2006 on Windows XP, 32-bit.
os.stat() on an "in use" file (i.e., open by another process) erroneously returns WindowsError [Error 13]. The file stats should be available on an open file, even if you cannot read/write the file itself.
Python 2.4 correctly returns the stats on the file.
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CORRECT in 2.4:
Python 2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)] on win32
>>> import os
>>> os.stat('c:\\hiberfil.sys')
(33206, 0L, 2, 1, 0, 0, 804311040L, 1173962381, 1173962381, 1069302780)
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ERROR in 2.5:
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32
>>> import os
>>> os.stat("c:\\hiberfil.sys")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
WindowsError: [Error 13] The process cannot access the file because it is being
used by another process: 'c:\\hiberfil.sys'
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Taking your hint, I just looked at the code in 42230 which uses the Win32 GetFileAttributesEx() function. This function does indeed return an error for an in-use file. Not sure if this is a "feature" or "bug" in the underlying Windows function. I did try FindFirstFile(), which is able to return info on an in-use file. Not sure if this is a reasonable alternative to GFAE(), but wanted to make folks aware of the possibility. It's probably slower, since it can handle wild-cards, and returns a handle for subsequent calls to FindNextFile(). The handle must be closed with FindClose(). I'm not sure what underlying mechanism FindFirstFile() uses, but I'm assuming it accesses the "directory" to get its information, rather than trying to access the file itself. FWIW.
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