struct_ff_trigger(9) suse man page | unix.com

STRUCT 
FF_TRIGGER(9)						  Input Subsystem					      STRUCT FF_TRIGGER(9)

NAME
       struct_ff_trigger - defines what triggers the force-feedback effect

SYNOPSIS
       struct ff_trigger {
	 __u16 button;
	 __u16 interval;
       };

MEMBERS
       button
	   number of the button triggering the effect

       interval
	   controls how soon the effect can be re-triggered

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010						      STRUCT FF_TRIGGER(9)