29 lines
991 B
Python
29 lines
991 B
Python
import errno
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import os
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import xattr
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_cached_attributes: dict[tuple[str, str], tuple[tuple[int, int, int], bytes | None]] = {}
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def getxattr(path: str, attr_name: str) -> bytes | None:
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key = (path, attr_name)
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st = os.stat(path)
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identity = (st.st_dev, st.st_ino, st.st_ctime_ns)
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cached = _cached_attributes.get(key)
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if cached is None or cached[0] != identity:
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try:
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response = xattr.getxattr(path, attr_name)
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except OSError as e:
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# ENODATA (Linux) or ENOATTR (macOS) means attribute hasn't been set
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if e.errno == errno.ENODATA or (hasattr(errno, 'ENOATTR') and e.errno == errno.ENOATTR):
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response = None
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else:
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raise
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_cached_attributes[key] = (identity, response)
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return _cached_attributes[key][1]
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def setxattr(path: str, attr_name: str, attr_value: bytes) -> None:
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xattr.setxattr(path, attr_name, attr_value)
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st = os.stat(path)
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_cached_attributes[(path, attr_name)] = ((st.st_dev, st.st_ino, st.st_ctime_ns), attr_value)
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