#include <u.h>#include <libc.h>#include <fcall.h>#include <thread.h>#include <9p.h>#include "dat.h"#include "fns.h" #define	SIZE	1024#define	DOTDOT	(&fmt+1) int	chatty; voidchat(char *fmt, ...){	char buf[SIZE], *out;	va_list arg; 	if (!chatty)		return; 	va_start(arg, fmt);	out = vseprint(buf, buf+sizeof(buf), fmt, arg);	va_end(arg);	write(2, buf, (long)(out-buf));} voidmchat(char *fmt, ...){	char buf[SIZE], *out;	va_list arg; 	va_start(arg, fmt);	out = vseprint(buf, buf+sizeof(buf), fmt, arg);	va_end(arg);	write(2, buf, (long)(out-buf));}voidpanic(char *fmt, ...){	char buf[SIZE];	va_list arg;	int n; 	n = sprint(buf, "%s %d: panic ", argv0, getpid());	va_start(arg, fmt);	vseprint(buf+n, buf+sizeof(buf)-n, fmt, arg);	va_end(arg);	fprint(2, "%s: %r\n", buf);	exits("panic");}