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HP-UX Reference > Tt_look(3)HP-UX 11i Version 2: December 2007 Update |
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NAMEt_look() — look at the current event on a transport endpoint SYNOPSIS#include <xti.h> /* for X/OPEN Transport Interface - XTI */ /* or */ #include <tiuser.h> /* for Transport Layer Interface - TLI */ int t_look (fd); int fd; DESCRIPTIONThe t_look() function 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 calling 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 a transport endpoint periodically for asynchronous events. XTI Internet Protocol-specific InformationAs soon as a segment with the TCP urgent pointer set enters the TCP receive buffer, the event T_EXDATA is indicated. T_EXDATA remains set until all data up to the byte pointed to by the TCP urgent pointer has been received. If the urgent pointer is updated, and the user has not yet received the byte previously pointed to by the urgent pointer, the update is transparent to the user. RETURN VALUEUpon success, t_look() returns a value that indicates which of the following allowable events has occurred, or returns zero if no event exists. One of the following events is returned:
ERRORSOn failure, t_errno is set to one of the following:
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