OSError: [Errno 45] in CIFS share but well in NFS share

[rdcyuxi]

OS: macOS Sonoma 14.7.5
Python: 3.13
SeleniumBase: 4.38.2

It's weird that if script is located in CIFS share it reported OSError, but works well in NFS share.

e.g. example/raw_turnstile.py

python3 raw_turnstile.py
=========================================================================== {raw_turnstile.py:3:SB} starts ===========================================================================
Traceback (most recent call last):
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/process_lock.py", line 85, in _try_acquire
    self.trylock()
    ~~~~~~~~~~~~^^
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/process_lock.py", line 203, in trylock
    _interprocess_mechanism.trylock(self.lockfile)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/process_mechanism.py", line 61, in trylock
    fcntl.lockf(lockfile, fcntl.LOCK_EX | fcntl.LOCK_NB)
    ~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 45] Operation not supported

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/yaleyu/mnt/build/SeleniumBase/examples/raw_turnstile.py", line 3, in <module>
    with SB(uc=True, test=True) as sb:
         ~~^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/[email protected]/3.13.3/Frameworks/Python.framework/Versions/3.13/lib/python3.13/contextlib.py", line 141, in __enter__
    return next(self.gen)
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/seleniumbase/plugins/sb_manager.py", line 1281, in SB
    sb.setUp()
    ~~~~~~~~^^
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/seleniumbase/fixtures/base_case.py", line 15312, in setUp
    self.driver = self.get_new_driver(
                  ~~~~~~~~~~~~~~~~~~~^
        browser=self.browser,
        ^^^^^^^^^^^^^^^^^^^^^
    ...<54 lines>...
        d_p_r=self.__device_pixel_ratio,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/seleniumbase/fixtures/base_case.py", line 4245, in get_new_driver
    new_driver = browser_launcher.get_driver(
        browser_name=browser_name,
    ...<56 lines>...
        browser=browser_name,
    )
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/seleniumbase/core/browser_launcher.py", line 3176, in get_driver
    return get_local_driver(
        browser_name,
    ...<53 lines>...
        device_pixel_ratio,
    )
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/seleniumbase/core/browser_launcher.py", line 4992, in get_local_driver
    with uc_lock:  # Avoid multithreaded issues
         ^^^^^^^
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/process_lock.py", line 166, in __enter__
    gotten = self.acquire()
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/process_lock.py", line 149, in acquire
    gotten = r(self._try_acquire, blocking, watch)
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/_utils.py", line 103, in __call__
    return fn(*args, **kwargs)
  File "/Users/yaleyu/Library/Python/3.13/lib/python/site-packages/fasteners/process_lock.py", line 93, in _try_acquire
    raise threading.ThreadError("Unable to acquire lock on"
    ...<5 lines>...
                                })
RuntimeError: Unable to acquire lock on `b'downloaded_files/driver_fixing.lock'` due to [Errno 45] Operation not supported

[mdmintz]

Looks like a permissions issue on an external dependency, fasteners (https://pypi.org/project/fasteners/).
You'll need to use a folder where your program has permissions to write files.

Since the error is coming from an external dependency, there's not much that I can do from SeleniumBase's end, however you can change where you run your program so that the the necessary permissions are available.

[rdcyuxi]

Thanks for your prompt reply. Permission is right, I believe it's an CIFS issue. Searched in fasteners issues list, there's nothing talked about CIFS.

As workaroud I manually changed DOWNLOADS_FOLDER = '/tmp/downloaded_files' in fixtures/constants.py.