evmconncheck man page on HP-UX

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EvmConnCheck(3)						       EvmConnCheck(3)

NAME
       EvmConnCheck(),	 EvmConnWait(),	 EvmConnDispatch(),  EvmConnFlush()  -
       maintain connection with the EVM daemon

SYNOPSIS
   Library
       EVM Support Library

   Parameters
       connection  The EVM connection that is to be monitored.	See  the  Evm‐
		   ConnCreate(3) manpage.

       IOWaiting   This is the return operand.	Possible values for this oper‐
		   and are the following:

		   There is no outstanding I/O activity on the connection.

		   There is outstanding I/O activity on the connection.
			       The client needs to call	 to  handle  the  out‐
			       standing activity.

       timeout	 If  the  timeout  value is NULL, it specifies that is to wait
		 until there is activity on the connection.   If  the  timeout
		 value is not NULL, it specifies the amount of time that waits
		 for activity on the connection.

       count	 Receives a count of messages queued for sending  to  the  EVM
		 daemon.

DESCRIPTION
       The routine checks whether there is any I/O activity outstanding on the
       connection.  If there is activity, IOWaiting is set to The  program  is
       to  then	 call  to handle it.  If there is no outstanding I/O activity,
       IOWaiting is set to An response from this function does	not  guarantee
       that  an	 event	has arrived.  An response simply means that there is a
       message on the connection that needs to be handled.

       The routine blocks until activity is detected on	 the  connection.   If
       timeout	is not NULL, it specifies the amount of time that the function
       waits for activity on the connection before returning with a status of

       The routine handles one incoming I/O message on the connection, calling
       the  client's  callback	function  as  needed.	If there is no message
       awaiting processing, the function returns  immediately.	 Calling  this
       function	 is  not  guaranteed to invoke the connection's callback func‐
       tion.  If the callback is invoked, it is not necessarily true  that  an
       event has arrived.

       The  routine  attempts  to send to the EVM daemon any messages that are
       queued for output as a result of earlier calls on a connection that  is
       marked  as  a  non-blocking  connection.	 The routine continues to send
       messages from the queue, until either all messages have	been  sent  or
       until  the send buffer is full.	On return, if the count output parame‐
       ter is a number greater than zero, then that number is  the  number  of
       messages	 still	queued for sending.  returns See EvmConnControl(3) for
       more information.

RETURN VALUE
       The operation completed without error.

       One of the arguments to the function is invalid.

       A value in a structure member is invalid.

       An operation failed because an attempt to acquire heap memory failed.

       A read error occurred while reading from the EVM daemon connection.

       A write error occurred while writing to the EVM daemon connection.

       An error occurred on the EVM connection. Invoke
				  to destroy the connection.

       A timeout period expired.

       The current operation was interrupted by receipt of a signal.

       One or more messages is queued for sending to the EVM daemon.

ERRORS
       The value of is not set.

FILES
       Default pathname for the domain socket.

SEE ALSO
   Functions
       connect(2), select(2), socket(2).

   Routines
       EvmConnControl(3),   EvmConnCreate(3),	EvmConnDestroy(3),   EvmEvent‐
       Post(3).

   Event Management
       EVM(5).

   Event Callback
       EvmCallback(5).

   Event Connection
       EvmConnection(5).

   EVM Events
       EvmEvent(5).

							       EvmConnCheck(3)
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