t_sync(3)						     Library Functions Manual							 t_sync(3)

NAME

       t_sync() - synchronize transport library

SYNOPSIS

DESCRIPTION

       For the transport endpoint specified by fd, the function synchronizes the data structures managed by the transport library with information
       from the underlying transport provider.	In doing so, it can convert an uninitialized file descriptor (obtained via or as a result of a and
       to  an  initialized  endpoint,  assuming that the file descriptor referenced a transport endpoint, by updating and allocating the necessary
       library data structures.  This function also allows two cooperating processes to synchronize their interaction with a transport provider.

       For example, if a process forks a new process and issues an the new process must issue a to build the private library data structure  asso-
       ciated with a transport endpoint and to synchronize the data structure with the relevant provider information.

       It  is  important to remember that the transport provider treats all users of a transport endpoint as a single user.  If multiple processes
       are using the same endpoint, they should coordinate their activities so as not to violate the state of the transport endpoint.	The  func-
       tion  returns  the current state of the transport endpoint to the user, thereby enabling the user to verify the state before taking further
       action.	This coordination is only valid among cooperating processes; it is possible that a process or an incoming event could  change  the
       endpoint's state after a is issued.

       If the transport endpoint is undergoing a state transition when is called, the function will fail.

   Valid States
	All - apart from

   Fork Safety
       is not fork-safe.

RETURN VALUE

       returns	the  state of the transport connection endpoint on successful completion and -1 on failure, and is set to indicate the error.  The
       state returned is one of the following:

       Unbound

       Idle

       Outgoing connection pending

       Incoming connection pending

       Data transfer

       Outgoing orderly release (waiting for an orderly release indication)

       Incoming orderly release (waiting for an orderly release request)

ERRORS

       On failure, is set to one of the following:

       [TBADF]		The specified file descriptor does not refer to a transport endpoint.  This error may be returned when	the  fd  has  been
			previously closed or an erroneous number may have been passed to the call.

       [TSTATECHNG]	The transport endpoint is undergoing a state change.

       [TSYSERR]	A system error has occurred during execution of this function.

       [TPROTO] 	(XTI  only) This error indicates that a communication problem has been detected between XTI and the transport provider for
			which there is no other suitable XTI (

SEE ALSO

       t_open(3), t_getstate(3), dup(2), exec(2), fork(2), open(2), thread_safety(5).

STANDARDS CONFORMANCE

																	 t_sync(3)