t_look(3xti) [ultrix man page]

t_look(3xti)															      t_look(3xti)

Name
       t_look - look at the current event on a transport endpoint

Syntax
       #include <xti.h>

       int t_look(fd)
       int fd;

Arguments
       fd	 Identifies the transport endpoint where the current event is returned.

Description
       This  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 issuing functions in synchronous mode. Certain events require immediate  notifica-
       tion 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.

       --------------------------------------
       Parameters   Before Call   After Call
       --------------------------------------
       fd	    x		  /
       --------------------------------------

Return Values
       Upon  successful  completion, 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_UDERR	   Datagram error indication

		 T_ORDREL	   Orderly release indication

		 T_GODATA	   Flow control restrictions on normal data flow have been lifted. Normal data can be sent again.

		 T_GOEXDATA	   Flow control restrictions on expedited data flow have been lifted. Expedited data can be sent again.

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

Diagnostics
       On failure, t_errno  is set to one of the following:

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

       [TSYSERR]	   A system error has occurred during execution of this function.

See Also
       t_open(3xti), t_snd(3xti), t_sndudata(3xti)

																      t_look(3xti)

t_look(3NSL)					       Networking Services Library Functions					      t_look(3NSL)

NAME

       t_look - look at the current event on a transport endpoint

SYNOPSIS

       #include <xti.h>

       int t_look(int fd);

DESCRIPTION

       This  routine is part of the XTI interfaces which evolved from the TLI interfaces. XTI represents the future evolution of these interfaces.
       However, TLI interfaces are supported for compatibility. When using a TLI routine that has the same name as an XTI routine,  the   tiuser.h
       header file must be used.  Refer to the	TLI COMPATIBILITY section for a description of differences between the two interfaces.

       This  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  notifica-
       tion 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.

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	       Disconnection received.

       T_UDERR		       Datagram error indication.

       T_ORDREL 	       Orderly release indication.

       T_GODATA 	       Flow control restrictions on normal data flow that led to a TFLOW error have been lifted. Normal data may  be  sent
			       again.

       T_GOEXDATA	       Flow  control restrictions on expedited data flow that led to a TFLOW error have been lifted. Expedited data may be
			       sent again.

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

VALID STATES

       ALL - apart from T_UNINIT.

ERRORS

       On failure, t_errno is set to one of the following:

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

       TPROTO		       This error indicates that a communication problem has been detected between XTI	and  the  transport  provider  for
			       which there is no other suitable XTI error (t_errno).

       TSYSERR		       A system error has occurred during execution of this function.

TLI COMPATIBILITY

       The  XTI  and  TLI interface definitions have common names but use different header files. This, and other semantic differences between the
       two interfaces are described in the subsections below.

   Interface Header
       The XTI interfaces use the header file, xti.h. TLI interfaces should not use this header.  They should use the header:

       #include <tiuser.h>

   Return Values
       The return values that are defined by the XTI interface and cannot be returned by the TLI interface are:

		 T_GODATA

		 T_GOEXDATA

   Error Description Values
       The t_errno value that can be set by the XTI interface and cannot be set by the TLI interface is:

		 TPROTO

ATTRIBUTES

       See attributes(5)  for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       t_open(3NSL), t_snd(3NSL), t_sndudata(3NSL), attributes(5)

SunOS 5.10							    7 May 1998							      t_look(3NSL)