external scrub_file : t -> string -> unit = "ocaml_guestfs_scrub_file"
external scrub_freespace : t -> string -> unit = "ocaml_guestfs_scrub_freespace"
external mkdtemp : t -> string -> string = "ocaml_guestfs_mkdtemp"
+external wc_l : t -> string -> int = "ocaml_guestfs_wc_l"
+external wc_w : t -> string -> int = "ocaml_guestfs_wc_w"
+external wc_c : t -> string -> int = "ocaml_guestfs_wc_c"