+val tar_in : t -> string -> string -> unit
+(** unpack tarfile to directory *)
+
+val tar_out : t -> string -> string -> unit
+(** pack directory into tarfile *)
+
+val tgz_in : t -> string -> string -> unit
+(** unpack compressed tarball to directory *)
+
+val tgz_out : t -> string -> string -> unit
+(** pack directory into compressed tarball *)
+
+val mount_ro : t -> string -> string -> unit
+(** mount a guest disk, read-only *)
+
+val mount_options : t -> string -> string -> string -> unit
+(** mount a guest disk with mount options *)
+
+val mount_vfs : t -> string -> string -> string -> string -> unit
+(** mount a guest disk with mount options and vfstype *)
+