+ (** cp frontend *)
+val cp: string -> string -> unit
+ (** wget frontend, if output is given it is the destination file, otherwise
+ standard wget rules are used. Additionally this function support also the
+ "file://" scheme for file system addressing *)
+val wget: ?output: string -> string -> unit
+ (** gzip frontend. If keep = true original file will be kept, default is
+ false. output is the file on which gzipped data will be saved, default is
+ given file with an added ".gz" suffix *)
+val gzip: ?keep: bool -> ?output: string -> string -> unit
+ (** gunzip frontend. If keep = true original file will be kept, default is
+ false. output is the file on which gunzipped data will be saved, default is
+ given file name without trailing ".gz" *)
+val gunzip: ?keep: bool -> ?output: string -> string -> unit
+ (** tempfile frontend, return the name of created file. A special purpose
+ suffix is used (actually "_http_getter" *)
+val tempfile: unit -> string
+ (** mkdir frontend, if parents = true also parent directories will be created.
+ If the given directory already exists doesn't act *)
+val mkdir: ?parents: bool -> string -> unit
+
+ (** pretty printer for Unix.process_status values *)
+val string_of_proc_status : Unix.process_status -> string
+
+ (** raw HTTP downloader, return Some the contents of downloaded resource or
+ None if an error occured while downloading. This function support also
+ "file://" scheme for filesystem resources *)
+val http_get: string -> string option
+ (** 'iter' like method that iter over string slices (unspecified length) of a
+ remote resources fetched via HTTP GET requests *)
+val http_get_iter_buf: callback:(string -> unit) -> string -> unit
+
+ (** add a line to a file (specified by name) _after_ a given line (defaults to
+ last line). *)
+val add_line: fname:string -> ?position:int -> string -> unit
+ (** remove a line, if any, from a file specified by line number (0 based, i.e.
+ first line of file is line 0) *)
+val remove_line: fname:string -> int -> unit
+
+ (** true on blanks-only and #-commented lines, false otherwise *)
+val is_blank_line: string -> bool
+