external sh : t -> string -> string = "ocaml_guestfs_sh"
external sh_lines : t -> string -> string array = "ocaml_guestfs_sh_lines"
external glob_expand : t -> string -> string array = "ocaml_guestfs_glob_expand"
+external scrub_device : t -> string -> unit = "ocaml_guestfs_scrub_device"
+external scrub_file : t -> string -> unit = "ocaml_guestfs_scrub_file"
+external scrub_freespace : t -> string -> unit = "ocaml_guestfs_scrub_freespace"