ddu_init

Usage: int ddu_init(char *fname, struct fifo_mode fmode );
Returns: 0 if good status, -1 if bad status.
This routine attaches a process to a fifo, from where it can receive events. If the fifo already exists, it attaches to it. If the event is a producer, the fifo name is ``INPUT''.

 
		  fname 		 Fifoname.

		  fmode 		 fifo mode (C structure  fifo_mode )

 
		  struct fifo_mode {

		 		  int mode;

		 		  int wait;

		 		  int prescale;

		 		  int xsuser;

		 		  int *p2ctl;

		 };

 
		  fmode.mode 		  FMODE_ALL : every event

		 		  FMODE_COND : only events that match *p2ctl

		 		  FMODE_ONREQ : gets only events if asks for

		 fmode.wait 		  DD_WAIT_SLEEP : falls asleep if no event available

		 		  DD_WAIT_ASYNC : returns with error code if no event

		 		 available

		  fmode.prescale  		 prescale factor: gets only every n-th event (default: 1)

		  fmode.suser 		 FMODE_SINGLE_USER: only one process is allowed

		 		 to attach to the fifo

		 		 FMODE_MULTI_USER: multiple processes are allowed

		 		 to attach to the fifo

		  *p2ctl  		 pointer to the four control words (see below for details).