extfs.py

ofrak.core.extfs

Ext2Filesystem (ExtFilesystem) dataclass

Linux EXT2 filesystem.

Ext3Filesystem (ExtFilesystem) dataclass

Linux EXT3 filesystem.

Ext4Filesystem (ExtFilesystem) dataclass

Linux EXT4 filesystem.

ExtFilesystem (GenericBinary, FilesystemRoot) dataclass

ExtFilesystem()

ExtUnpacker (Unpacker)

Unpack a Linux EXT filesystem.

unpack(self, resource, config=None) async

Unpack the given resource.

Users should not call this method directly; rather, they should run Resource.run or Resource.unpack.

Parameters:

Name	Type	Description	Default
resource	Resource	The resource that is being unpacked	required
config	ComponentConfig	Optional config for unpacking. If an implementation provides a default, this default will always be used when config would otherwise be None. Note that a copy of the default config will be passed, so the default config values cannot be modified persistently by a component run.	None

Source code in ofrak/core/extfs.py

async def unpack(self, resource: Resource, config: ComponentConfig = None) -> None:
    with tempfile.NamedTemporaryFile(suffix=".extfs") as temp_fs_file:
        temp_fs_file.write(await resource.get_data())
        temp_fs_file.flush()

        with tempfile.TemporaryDirectory() as temp_dir:
            command = [
                "debugfs",
                "-R",
                f"rdump / {temp_dir}",
                temp_fs_file.name,
            ]
            proc = await asyncio.create_subprocess_exec(
                *command,
            )
            returncode = await proc.wait()
            if returncode:
                raise CalledProcessError(returncode=returncode, cmd=command)

            fs_view = await resource.view_as(ExtFilesystem)
            await fs_view.initialize_from_disk(temp_dir)