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t_close - Closes a transport endpoint.


XTI Library (libxti.a)


#include <xti.h> int t _close( int fd) ;


Interfaces documented on this reference page conform to industry standards as follows: t_close: XPG4-UNIX Refer to the standards(5) reference page for more information about industry standards and associated tags.


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: y This is a meaningful parameter. n This is not a meaningful parameter. fd Specifies a file descriptor returned by the t_open() function that identifies a local transport endpoint.


The t_close() function is intended to be called in the T_UNBND transport provider state (see the DESCRIPTION section).


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 transport 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.


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.


If the t_close() function fails, t_errno may be set to the following value: [TBADF] File descriptor fd does not refer to a valid 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).


Functions: t_getstate(3), t_open(3), t_unbind(3)