T_LOOK(3N) — NETWORK FUNCTIONS

NAME

t_look − look at the current event on a transport endpoint

SYNOPSIS

#include <tiuser.h>

int t_look(fd)
int fd;

DESCRIPTION

t_look() returns the current event on the transport endpoint specified by fd. This function enables a transport provider to notify a transport user of an asynchronous event when the user is issuing functions in synchronous mode. Certain events require immediate notification of the user and are indicated by a specific error, TLOOK, on the current or next function to be executed.

This function also enables a transport user to poll(2) a transport endpoint periodically for asynchronous events.

RETURN VALUES

Upon success, t_look() returns a value that indicates which of the allowable events has occurred, or returns zero if no event exists. One of the following events is returned:

T_LISTEN Connection indication received

T_CONNECT Connect confirmation received

T_DATA Normal data received

T_EXDATA Expedited data received

T_DISCONNECT Disconnect received

T_ERROR Fatal error indication

T_UDERR Datagram error indication

T_ORDREL Orderly release indication

On failure, −1 is returned and t_errno is set to indicate the error.

ERRORS

TBADF The specified file descriptor does not refer to a transport endpoint.

TSYSERR The function failed due to a system error and set errno to indicate the error.

Museum