val pread :
fd:Unix.file_descr ->
fd_offset:int63 ->
buffer:bytes ->
buffer_offset:int ->
length:int ->
intReads up to length bytes from fd (starting at position fd_offset) into buffer (starting at position buffer_offset). Returns the number of bytes actually read. fd's cursor position is unchanged.
val pwrite :
fd:Unix.file_descr ->
fd_offset:int63 ->
buffer:bytes ->
buffer_offset:int ->
length:int ->
intWrites up to length bytes from buffer (starting at position buffer_offset) to the file descriptor fd (starting at position fd_offset). Returns the number of bytes actually written. fd's cursor position is unchanged.