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os.fstat() fails on FAT32 file system on Windows #111856
Description
Bug report
Bug description:
This is Python 3.12.0 x64 running on Windows 11. On a FAT32 drive, I have a file f.txt.
>>> import os
>>> os.stat('f.txt')
os.stat_result(st_mode=33206, st_ino=4194560, st_dev=1589430838, st_nlink=1, st_uid=0, st_gid=0, st_size=0, st_atime=1699419600, st_mtime=1699459266, st_ctime=1699459265)
>>> f = open('f.txt','rb')
>>> f.fileno()
3
>>> os.fstat(f.fileno())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
OSError: [WinError 87] The parameter is incorrectThis error does not occur with Python 3.11.6. I suspect that the issue was introduced with #102149. 6031727 provided a fix for os.stat(), but it seems that an equivalent bug exists for os.fstat().
I believe the fix would involve changing the line https://github.com/python/cpython/blob/74b868f636a8af9e5540e3315de666500147d47a/Python/fileutils.c#L1275C48-L1275C48 to account for the possibility that the file system does not support FileIdInfo.
CPython versions tested on:
3.12
Operating systems tested on:
Windows
Activity
gh-111856: Fix os.fstat on windows with FAT32 and exFAT filesystem (G…
pythongh-111856: Fix os.fstat on windows with FAT32 and exFAT filesys…
zooba commentedon Nov 13, 2023
Thanks for the report and the fix!
gh-111856: Fix os.fstat on windows with FAT32 and exFAT filesystem (G…
pythongh-111856: Fix os.fstat on windows with FAT32 and exFAT filesys…
pythongh-111856: Fix os.fstat on windows with FAT32 and exFAT filesys…