+external exists : t -> string -> bool = "ocaml_guestfs_exists"
+external is_file : t -> string -> bool = "ocaml_guestfs_is_file"
+external is_dir : t -> string -> bool = "ocaml_guestfs_is_dir"
+external pvcreate : t -> string -> unit = "ocaml_guestfs_pvcreate"
+external vgcreate : t -> string -> string array -> unit = "ocaml_guestfs_vgcreate"
+external lvcreate : t -> string -> string -> int -> unit = "ocaml_guestfs_lvcreate"
+external mkfs : t -> string -> string -> unit = "ocaml_guestfs_mkfs"
+external sfdisk : t -> string -> int -> int -> int -> string array -> unit = "ocaml_guestfs_sfdisk_byte" "ocaml_guestfs_sfdisk"
+external write_file : t -> string -> string -> int -> unit = "ocaml_guestfs_write_file"
+external umount : t -> string -> unit = "ocaml_guestfs_umount"
+external mounts : t -> string array = "ocaml_guestfs_mounts"
+external umount_all : t -> unit = "ocaml_guestfs_umount_all"
+external lvm_remove_all : t -> unit = "ocaml_guestfs_lvm_remove_all"
+external file : t -> string -> string = "ocaml_guestfs_file"
+external command : t -> string array -> string = "ocaml_guestfs_command"
+external command_lines : t -> string array -> string array = "ocaml_guestfs_command_lines"
+external stat : t -> string -> stat = "ocaml_guestfs_stat"
+external lstat : t -> string -> stat = "ocaml_guestfs_lstat"
+external statvfs : t -> string -> statvfs = "ocaml_guestfs_statvfs"
+external tune2fs_l : t -> string -> (string * string) list = "ocaml_guestfs_tune2fs_l"
+external blockdev_setro : t -> string -> unit = "ocaml_guestfs_blockdev_setro"
+external blockdev_setrw : t -> string -> unit = "ocaml_guestfs_blockdev_setrw"
+external blockdev_getro : t -> string -> bool = "ocaml_guestfs_blockdev_getro"
+external blockdev_getss : t -> string -> int = "ocaml_guestfs_blockdev_getss"
+external blockdev_getbsz : t -> string -> int = "ocaml_guestfs_blockdev_getbsz"
+external blockdev_setbsz : t -> string -> int -> unit = "ocaml_guestfs_blockdev_setbsz"
+external blockdev_getsz : t -> string -> int64 = "ocaml_guestfs_blockdev_getsz"
+external blockdev_getsize64 : t -> string -> int64 = "ocaml_guestfs_blockdev_getsize64"
+external blockdev_flushbufs : t -> string -> unit = "ocaml_guestfs_blockdev_flushbufs"
+external blockdev_rereadpt : t -> string -> unit = "ocaml_guestfs_blockdev_rereadpt"
+external upload : t -> string -> string -> unit = "ocaml_guestfs_upload"
+external download : t -> string -> string -> unit = "ocaml_guestfs_download"
+external checksum : t -> string -> string -> string = "ocaml_guestfs_checksum"
+external tar_in : t -> string -> string -> unit = "ocaml_guestfs_tar_in"
+external tar_out : t -> string -> string -> unit = "ocaml_guestfs_tar_out"
+external tgz_in : t -> string -> string -> unit = "ocaml_guestfs_tgz_in"
+external tgz_out : t -> string -> string -> unit = "ocaml_guestfs_tgz_out"
+external mount_ro : t -> string -> string -> unit = "ocaml_guestfs_mount_ro"
+external mount_options : t -> string -> string -> string -> unit = "ocaml_guestfs_mount_options"
+external mount_vfs : t -> string -> string -> string -> string -> unit = "ocaml_guestfs_mount_vfs"
+external debug : t -> string -> string array -> string = "ocaml_guestfs_debug"
+external lvremove : t -> string -> unit = "ocaml_guestfs_lvremove"
+external vgremove : t -> string -> unit = "ocaml_guestfs_vgremove"
+external pvremove : t -> string -> unit = "ocaml_guestfs_pvremove"