ddu_set_protection

Usage: int ddu_set_protection(prot_flag);
Returns: 0 if good status, -1 if bad status.
A demon process (garbage demon) checks in regular intervals, whether there are processes that are clobbering the system (more precisely whether there are fifos that are full but never read out). If such a fifo is found, then the fifo is deactivated and a signal HUP is sent to the process (which probably has already died).
By default the fifo is not protected against this checking mechanism. ddu_set_protection allows to change the default behaviour.

 
 prot_flag  		  FIFO_PROTECTED  		 fifo will under no circumstance be removed

		  FIFO_UNPROTECTED  		 fifo will be removed (default).