--- a/python/unblob/file_utils.py
+++ b/python/unblob/file_utils.py
@@ -125,6 +125,16 @@ class OffsetFile:
    def tell(self):
        return self._file.tell() - self._offset

+    @property
+    def closed(self):
+        return self._file == None
+
+    def close(self):
+        if self._file:
+            self._file.close()
+            self._file = None

class Package:
    def __init__(self, path_or_bytesio: Union[Path, io.BytesIO]):
        if hasattr(path_or_bytesio, "read"):
            self.path = None
            self.file = path_or_bytesio
        else:
            self.path = path_or_bytesio.resolve(True)
            self.file = self.path.open("rb")

Activated FS access restrictions; rules=[Read("/"), ReadWrite("/dev/shm"), ReadWrite("/tmp/foo"), RemoveDir("/tmp/foo"), RemoveFile("/tmp/foo"), MakeDir("/tmp"), ReadWrite("unblob.log")], status=FullyEnforced pid=3928538
Processing file                path=/home/jon/Downloads/7z2501.msi pid=3928542 size=0x17dc00
...
  File "/usr/lib/python3.11/pathlib.py", line 1045, in open
    return io.open(self, mode, buffering, encoding, errors, newline)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
PermissionError: [Errno 13] Permission denied: '/tmp/foo/7z2501.msi_extract/0-1513984.msi'