+external cat : t -> string -> string = "ocaml_guestfs_cat"
+external ll : t -> string -> string = "ocaml_guestfs_ll"
+external ls : t -> string -> string array = "ocaml_guestfs_ls"
+external list_devices : t -> string array = "ocaml_guestfs_list_devices"
+external list_partitions : t -> string array = "ocaml_guestfs_list_partitions"
+external pvs : t -> string array = "ocaml_guestfs_pvs"
+external vgs : t -> string array = "ocaml_guestfs_vgs"
+external lvs : t -> string array = "ocaml_guestfs_lvs"
+external pvs_full : t -> lvm_pv array = "ocaml_guestfs_pvs_full"
+external vgs_full : t -> lvm_vg array = "ocaml_guestfs_vgs_full"
+external lvs_full : t -> lvm_lv array = "ocaml_guestfs_lvs_full"
+external read_lines : t -> string -> string array = "ocaml_guestfs_read_lines"
+external aug_init : t -> string -> int -> unit = "ocaml_guestfs_aug_init"
+external aug_close : t -> unit = "ocaml_guestfs_aug_close"
+external aug_defvar : t -> string -> string option -> int = "ocaml_guestfs_aug_defvar"
+external aug_defnode : t -> string -> string -> string -> int * bool = "ocaml_guestfs_aug_defnode"
+external aug_get : t -> string -> string = "ocaml_guestfs_aug_get"
+external aug_set : t -> string -> string -> unit = "ocaml_guestfs_aug_set"
+external aug_insert : t -> string -> string -> bool -> unit = "ocaml_guestfs_aug_insert"
+external aug_rm : t -> string -> int = "ocaml_guestfs_aug_rm"
+external aug_mv : t -> string -> string -> unit = "ocaml_guestfs_aug_mv"
+external aug_match : t -> string -> string array = "ocaml_guestfs_aug_match"
+external aug_save : t -> unit = "ocaml_guestfs_aug_save"
+external aug_load : t -> unit = "ocaml_guestfs_aug_load"
+external aug_ls : t -> string -> string array = "ocaml_guestfs_aug_ls"