catch permissions errors and display owner+user information

radicale/storage/multifilesystem/__init__.py

@@ -29,7 +29,7 @@ import sys
 import time
 from typing import ClassVar, Iterator, Optional, Type
 
-from radicale import config
+from radicale import config, pathutils, utils
 from radicale.log import logger
 from radicale.storage.multifilesystem.base import CollectionBase, StorageBase
 from radicale.storage.multifilesystem.cache import CollectionPartCache
@@ -187,6 +187,9 @@ class Storage(
                 logger.info("Storage item mtime resolution test result: %d %s" % (precision_unit, unit))
                 if self._use_mtime_and_size_for_item_cache is False:
                     logger.info("Storage cache using mtime and size for 'item' may be an option in case of performance issues")
+        except PermissionError as e:
+            logger.error("Directory permissions: %s / Effective user: %s", pathutils.path_permissions_as_string(self._get_collection_root_folder()), utils.user_groups_as_string())
+            raise e
         except Exception:
             logger.warning("Storage item mtime resolution test result not successful")
         logger.debug("Storage cache action logging: %s", self._debug_cache_actions)