"""The Logical Volume Manager (LVM) directory implementation."""
from dfvfs.path import lvm_path_spec
from dfvfs.vfs import directory
[docs]
class LVMDirectory(directory.Directory):
"""File system directory that uses pyvslvm."""
def _EntriesGenerator(self):
"""Retrieves directory entries.
Since a directory can contain a vast number of entries using
a generator is more memory efficient.
Yields:
LVMPathSpec: a path specification.
"""
volume_index = getattr(self.path_spec, "volume_index", None)
location = getattr(self.path_spec, "location", None)
# Only the virtual root file has directory entries.
if (
volume_index is None
and location is not None
and location == self._file_system.LOCATION_ROOT
):
vslvm_volume_group = self._file_system.GetLVMVolumeGroup()
for volume_index in range(vslvm_volume_group.number_of_logical_volumes):
lvm_volume_index = volume_index + 1
yield lvm_path_spec.LVMPathSpec(
location=f"/lvm{lvm_volume_index:d}",
parent=self.path_spec.parent,
volume_index=volume_index,
)