`sig
val ls : string -> string list
val file_kind : string -> Core.Std.Unix.file_kind
val home : unit -> string
val groups : unit -> string list
val hostname : unit -> string
val last_accessed :
?follow_symlinks:bool -> string -> Core.Std.Time.t option
val last_accessed_exn : ?follow_symlinks:bool -> string -> Core.Std.Time.t
val last_modified :
?follow_symlinks:bool -> string -> Core.Std.Time.t option
val last_modified_exn : ?follow_symlinks:bool -> string -> Core.Std.Time.t
val last_changed :
?follow_symlinks:bool -> string -> Core.Std.Time.t option
val last_changed_exn : ?follow_symlinks:bool -> string -> Core.Std.Time.t
val file_size : ?follow_symlinks:bool -> string -> Core.Std.Int64.t option
val file_size_exn : ?follow_symlinks:bool -> string -> Core.Std.Int64.t
val scroll_lock : bool -> unit
end`