`sig
val argv : string array
val executable_name : string
val file_exists :
?follow_symlinks:bool -> string -> [ `No | `Unknown | `Yes ]
val file_exists_exn : ?follow_symlinks:bool -> string -> bool
val is_directory :
?follow_symlinks:bool -> string -> [ `No | `Unknown | `Yes ]
val is_file : ?follow_symlinks:bool -> string -> [ `No | `Unknown | `Yes ]
val is_directory_exn : ?follow_symlinks:bool -> string -> bool
val is_file_exn : ?follow_symlinks:bool -> string -> bool
val remove : string -> unit
val rename : string -> string -> unit
val getenv : string -> string option
val getenv_exn : string -> string
val command : string -> int
val command_exn : string -> unit
val chdir : string -> unit
val getcwd : unit -> string
val readdir : string -> string array
val fold_dir : init:'acc -> f:('acc -> string -> 'acc) -> string -> 'acc
val ls_dir : string -> string list
val interactive : bool ref
val os_type : string
val word_size : int
val big_endian : bool
exception Break
val catch_break : bool -> unit
val ocaml_version : string
val execution_mode : unit -> [ `Bytecode | `Native ]
external c_int_size : unit -> int = "c_int_size" "noalloc"
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`