Convert between Unix.file_descr and Eio objects.
val peek : < unix_fd.. > -> Unix.file_descrpeek x is the Unix file descriptor underlying x. The caller must ensure that they do not continue to use the result after x is closed.
val peek_opt : Eio.Generic.t -> Unix.file_descr optionpeek_opt x is the Unix file descriptor underlying x, if any. The caller must ensure that they do not continue to use the result after x is closed.
val take : < unix_fd.. > -> Unix.file_descrtake x is like peek, but also marks x as closed on success (without actually closing the FD). x can no longer be used after this, and the caller is responsible for closing the FD.
val take_opt : Eio.Generic.t -> Unix.file_descr optiontake_opt x is like peek_opt, but also marks x as closed on success (without actually closing the FD). x can no longer be used after this, and the caller is responsible for closing the FD.
val as_socket :
sw:Eio.Std.Switch.t ->
close_unix:bool ->
Unix.file_descr ->
socketas_socket ~sw ~close_unix:true fd is an Eio flow that uses fd. It can be cast to e.g. Eio.source for a one-way flow. The socket object will be closed when sw finishes.