Looks at the current event on a transport end point.
Transport Layer Interface Library (libtli.a)
#include <tiuser.h>
int t_look(fd) int fd;
The t_look subroutine returns the current event on the transport end point specified by the fd parameter. This subroutine 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 subroutine executed.
This subroutine also enables a transport user to poll a transport end point periodically for asynchronous events.
| fd | Specifies the transport end point. |
On successful completion, the t_look subroutine returns a value that indicates which of the allowable events has occurred, or returns a value of 0 if no event exists. One of the following events is returned:
If the t_look subroutine is unsuccessful, a value of -1 is returned, and the t_errno variable is set to indicate the error.
If unsuccessful, the t_errno variable is set to one of the following:
| TBADF | The specified file descriptor does not refer to a transport end point. |
| TSYSERR | A system error has occurred during execution of this function. |
This subroutine is part of Base Operating System (BOS) Runtime.
The t_open subroutine.
List of Streams Programming References and STREAMS Overview in AIX Version 4.3 Communications Programming Concepts.