class output_descr :Creates a
?blocking:bool -> ?start_pos_out:int -> Unix.file_descr ->
raw_out_channelfor the passed file descriptor, which must be open for writing.
pos_out method returns logical positions, i.e. it counts the number
of written octets. It is not tried to determine the real file position.
close_out also closes the file descriptor.
blocking: Whether the channel waits until it can output if it is not possible to write to the (non-blocking) descriptor. Defaults to
start_pos_out: The position to which
pos_outis initialized when the channel is created, by default 0