#include <u.h>#include <libc.h> longtime(long *tp){	char b[20];	static int f = -1;	long t; 	memset(b, 0, sizeof(b));	if(f < 0)		f = open("/dev/time", OREAD|OCEXEC);	if(f >= 0) {		seek(f, 0, 0);		read(f, b, sizeof(b));	}	t = atol(b);	if(tp)		*tp = t;	return t;}