unix 下的C开发手册,还用详细的例程。

																				t_close																The Single UNIX ® Specification, Version 2				Copyright © 1997 The Open Group												NAME				t_close - close a transport endpoint				SYNOPSIS												#include <xti.h>								int t_close(				    int fd)												DESCRIPTION								Parameters				Before call				After call				fd				x				/																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()).				However, this function does not check state information,				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()				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.								For advice on how to write protocol-independent applications, see				.				For information on protocol-specific behaviour of				t_close(),				see the XTI Appendix for the relevant transport provider.				VALID STATES				ALL - apart from T_UNINIT				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.												RETURN VALUE				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.				SEE ALSO				t_getstate(),				t_open(),				t_unbind().												UNIX ® is a registered Trademark of The Open Group.				Copyright © 1997 The Open Group				 [ Main Index | XSH | XCU | XBD | XCURSES | XNS ]