t_getstate(3N)

NAME

t_getstate − get the current state

SYNOPSIS

cc [ flag ... ] file ... −lnsl [ library ... ]

#include <xti.h>

int t_getstate(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, a different header file, tiuser.h , must be used. Refer to the section, TLI COMPATIBILITY , for a description of differences between the two interfaces.

The t_getstate() function returns the current state of the provider associated with the transport endpoint specified by fd.

VALID STATES

Legitimate states (see t_getstate(3N)) for a call to this routine are every one except T_UNINIT .

RETURN VALUES

t_getstate() returns:

The Current State On success.

−1 On failure.

On failure, t_errno is set to indicate the error, and possibly errno is set. The current state may be one of the following:

T_UNBND Unbound

T_IDLE Idle

T_OUTCON Outgoing connection pending

T_INCON Incoming connection pending

T_DATAXFER Data transfer

T_OUTREL Outgoing orderly release (waiting for an orderly release indication)

T_INREL Incoming orderly release (waiting to send an orderly release request)

If the provider is undergoing a state transition when t_getstate() is called, the function will fail.

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 t_errno value.

TSTATECHNG The transport provider is undergoing a transient state change.

TSYSERR A system error has occurred during execution of this function, errno will be set to the specific error.

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>

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

For more information refer to the Transport Interfaces Programming Guide.

ATTRIBUTES

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	MT-Safe

Museum

Related Articles