Fd (b0.B0_std.Os.Fd)

val unix_buffer_size : int

unix_buffer_size is the value of the OCaml runtime system buffer size for I/O operations.

val apply : 
  close:(Unix.file_descr -> unit) ->
  Unix.file_descr ->
  (Unix.file_descr -> 'a) ->
  'a

apply ~close fd f calls f fd and ensure close fd is is called whenever the function returns. Any Unix.Unix_error raised by close fd is ignored.

val copy : 
  ?buf:Stdlib.Bytes.t ->
  Unix.file_descr ->
  dst:Unix.file_descr ->
  unit

copy ~buf src ~dst reads src and writes it to dst using buf as a buffer; if unspecified a buffer of length unix_buffer_size is created for the call. Raise Unix.Unix_error if that happens

val to_string : Unix.file_descr -> string

to_string fd reads fd to a string. Raises Unix.Unix_error in case of error.

val read_file : string -> Unix.file_descr -> string

read_file fn fd reads fd to a string assuming it is a file descriptor open on file path fn. Raises Failure in case of error with an error message that mentions fn.