/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h> voidperror(char *s){	char buf[ERRMAX]; 	buf[0] = '\0';	errstr(buf, sizeof buf);	if(s && *s)		fprint(2, "%s: %s\n", s, buf);	else		fprint(2, "%s\n", buf);}