t_sndrel -- initiate an orderly release


TLI syntax

cc . . . -lnsl

#include <sys/tiuser.h>

int t_sndrel (fd) int fd;

XTI syntax

cc . . . -lxti

#include <xti.h>

int t_sndrel (fd) int fd;


The t_sndrel function is used to initiate an orderly release of a transport connection and indicates to the transport provider that the transport user has no more data to send. fd identifies the local transport endpoint where the connection exists. After issuing t_sndrel, the user may not send any more data over the connection. However, a user may continue to receive data if an orderly release indication has been received.

This function is an optional service of the transport provider and is only supported if the transport provider returned service type T_COTS_ORD on t_open or t_getinfo.

Return values

t_sndrel returns 0 on success and -1 on failure, and t_errno is set to indicate the error.


On failure, t_errno may be set to one of the following:

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

O_NONBLOCK was set, but the flow control mechanism prevented the transport provider from accepting the function at this time.

A disconnect event has occurred on this transport endpoint.

The state was incorrect when this routine was called; XTI only.

This error is generated if the T_COTS_ORD service type is not returned by a previous call to the t_open(NET) or t_getinfo(NET) routine.

A system error has occurred during execution of this function.

See also

Intro(NET), t_getinfo(NET), t_open(NET), t_rcvrel(NET)

Standards conformance

t_sndrel is conformant with:

AT&T SVID Issue 3 ;
X/Open CAE Specification, Networking Services, Issue 4, 1994. ;
and Intel386 Binary Compatibility Specification, Edition 2 (iBCSe2) .

© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003