#include <u.h>#include <libc.h>#include "iotrack.h"#include "dat.h"#include "fns.h" #define	SIZE	1024int	chatty;extern int	doabort; voidchat(char *fmt, ...){	va_list arg; 	if (!chatty)		return;	va_start(arg, fmt);	vfprint(2, fmt, arg);	va_end(arg);} voidpanic(char *fmt, ...){	va_list arg; 	fprint(2, "%s %d: panic ", argv0, getpid());	va_start(arg, fmt);	vfprint(2, fmt, arg);	va_end(arg);	fprint(2, ": %r\n");	if(doabort)		abort();	exits("panic");}