t_sync man page on HP-UX

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t_sync(3)							     t_sync(3)

       t_sync() - synchronize transport library

       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  function
       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.

       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:



       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)

       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 num‐
			ber 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

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

       t_open(3),    t_getstate(3),   dup(2),	exec(2),   fork(2),   open(2),


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