t_close(3) [osf1 man page]
t_close(3) Library Functions Manual t_close(3) NAME
t_close - Closes a transport endpoint. LIBRARY
XTI Library (libxti.a) SYNOPSIS
#include <xti.h> int t _close( int fd) ; STANDARDS
Interfaces documented on this reference page conform to industry standards as follows: t_close(): XNS4.0 Refer to the standards(5) reference page for more information about industry standards and associated tags. PARAMETERS
The following table summarizes the relevance of the input parameter before and after t_close() is called: Parameter Before Call After Call ------------------------------------- fd y n Notes to table: This is a meaningful parameter. This is not a meaningful parameter. Specifies a file descriptor returned by the t_open() function that identifies a local transport endpoint. VALID STATES
The t_close() function is intended to be called in the T_UNBND transport provider state (see the DESCRIPTION section). DESCRIPTION
The t_close() XTI function is used in connection-oriented and connectionless transport service to inform a transport provider that the transport user has finished with the transport endpoint. The transport endpoint is specified by a file descriptor previously returned by the t_open() function. The t_close() function frees any local library resources associated with the transport endpoint referenced by the file descriptor. The t_close() function does not check state information (see the t_getstate() function). Consequently, t_close() may be called in any transport provider state to close an open transport endpoint. When t_close() executes, local library resources associated with the trans- port endpoint are automatically freed. In addition, a close() function is called for the referenced file descriptor. The close() function aborts when there are no other file descriptors, in the current or any other process, that reference the same transport endpoint. When close() aborts, any connection that is associated with that transport endpoint is broken. RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned. Otherwise, a value of -1 is returned and t_errno is set to indicate the error. ERRORS
If the t_close() function fails, t_errno may be set to the following value: File descriptor fd does not refer to a valid transport end- point. 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). RELATED INFORMATION
Functions: t_getstate(3), t_open(3), t_unbind(3) delim off t_close(3)
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t_close(3NSL) Networking Services Library Functions t_close(3NSL) NAME
t_close - close a transport endpoint SYNOPSIS
#include <xti.h> int t_close(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. The t_close() function informs the transport provider that the user is finished with the transport endpoint specified by fd, and frees any local library resources associated with the endpoint. In addition, t_close() closes the file associated with the transport endpoint. The function t_close() should be called from the T_UNBND state. See t_getstate(3NSL). However, this function does not check state informa- tion, so it may be called from any state to close a transport endpoint. If this occurs, the local library resources associated with the endpoint will be freed automatically. In addition, close(2) will be issued for that file descriptor; if there are no other descriptors in this process or in another process which references the communication endpoint, any connection that may be associated with that endpoint is broken. The connection may be terminated in an orderly or abortive manner. A t_close() issued on a connection endpoint may cause data previously sent, or data not yet received, to be lost. It is the responsibility of the transport user to ensure that data is received by the remote peer. RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value of -1 is returned and t_errno is set to indicate an error. VALID STATES
T_UNBND ERRORS
On failure, t_errno is set to 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> 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
close(2), t_getstate(3NSL), t_open(3NSL), t_unbind(3NSL), attributes(5) SunOS 5.10 7 May 1998 t_close(3NSL)