#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <fcntl.h>
main()
{
	int kq,fd;
	struct kevent cl,evl;
	int data,udata;
	int res;

	kq = kqueue();
  	fd=open("/dev/acpi",O_RDONLY);
	EV_SET(&cl, fd, EVFILT_READ, EV_ADD|EV_ENABLE|EV_CLEAR,
	       0xffffffff,&data,&udata);
	kevent(kq,&cl,1,NULL,0,NULL);
	for(;;){ 
		res = kevent(kq,NULL,0,&cl,1,NULL);
		printf("%d\n",res);
		printf("%x\n",cl.fflags);
	}  
}