ValueError when converting os.getxattr result to float in get_ctime_linux

[JingofXin]

Actual Behavior: A ValueError is raised when attempting to convert the result of os.getxattr to a float. The output from os.getxattr appears to be corrupted or in an incorrect format.

Error Traceback:

Traceback (most recent call last):
  File "loguru/_ctime_functions.py", line 36, in get_ctime_linux
    return float(os.getxattr(filepath, b"user.loguru_crtime"))
ValueError: could not convert string to float: b'1721180095.264594\xdc:\xee|Q\x7f?WA\xf8\x8bdC\xe9V\xbdW\x19q\x80'

[Delgan]

Hi @JingofXin.

What is your OS version please?

[JingofXin]

Hi @JingofXin.

What is your OS version please?

Ubuntu 22.04.3 LTS

[JingofXin]

I’ve modified the code to handle the exception, which now bypasses the issue as follows:

def get_ctime_linux(filepath):
    try:
        return float(os.getxattr(filepath, b"user.loguru_crtime"))
    except Exception:
        return os.stat(filepath).st_mtime

[Delgan]

It's a real mystery how you end up with such weird value after the timestamp.

>>> print("\xdc:\xee|Q\x7f?WA\xf8\x8bdC\xe9V\xbdW\x19q\x80")
Ü:î|Q?WAødCéV½Wq

I don't think this is a bug in Loguru. Could it be that a program in your system is modifying the extended Linux attributes?

Do you have more context about how the problem occurs? Does it happen at the beginning or during execution? Is it systematic? Have you tried another log file?

What about the output of the following script:

import os

with open("random_file.txt", "w") as f:
    f.write("Hello, World!")

os.setxattr("random_file.txt", b"user.loguru_crtime", "1234567890.123456".encode("ascii"))

res = os.getxattr("random_file.txt", b"user.loguru_crtime")

print(res)