Release 260111

system/loggerd/xattr_cache.py

@@ -0,0 +1,23 @@
+import errno
+
+import xattr
+
+_cached_attributes: dict[tuple, bytes | None] = {}
+
+def getxattr(path: str, attr_name: str) -> bytes | None:
+  key = (path, attr_name)
+  if key not in _cached_attributes:
+    try:
+      response = xattr.getxattr(path, attr_name)
+    except OSError as e:
+      # ENODATA (Linux) or ENOATTR (macOS) means attribute hasn't been set
+      if e.errno == errno.ENODATA or (hasattr(errno, 'ENOATTR') and e.errno == errno.ENOATTR):
+        response = None
+      else:
+        raise
+    _cached_attributes[key] = response
+  return _cached_attributes[key]
+
+def setxattr(path: str, attr_name: str, attr_value: bytes) -> None:
+  _cached_attributes.pop((path, attr_name), None)
+  xattr.setxattr(path, attr_name, attr_value)