Module Fd_send_recvSource

Module to send and receive file descriptors over UNIX domain sockets.

Sourceexception Unix_error of int

Thrown by the low-level C functions

Sourceval send_fd : Unix.file_descr -> bytes -> int -> int -> Unix.msg_flag list -> Unix.file_descr -> int

send_fd channel_fd buf ofs len flags fd_to_send sends a message over channel_fd containing the buf ofs len substring, with flags and file descriptor fd_to_send, and returns the number of bytes sent. Note that you have to send a non-empty message (e.g. of size greater than zero) to actually have the fd passed.

Sourceval recv_fd : Unix.file_descr -> bytes -> int -> int -> Unix.msg_flag list -> int * Unix.sockaddr * Unix.file_descr

recv_fd channel_fd buf ofs len flags receives a message into substring buf ofs len with flags, returning the number of bytes read, the address of the peer and a file descriptor.

Sourceval send_fd_substring : Unix.file_descr -> string -> int -> int -> Unix.msg_flag list -> Unix.file_descr -> int

Like send_fd but takes a string

Sourceval int_of_fd : Unix.file_descr -> int

int_of_fd fd returns the underlying unix integer file descriptor associated with OCaml Unix.file_descr fd.

Sourceval fd_of_int : int -> Unix.file_descr

fd_of_int fd returns the OCaml Unix.file_descr associated with underlying unix integer fd.