/* readnvram */#include <u.h>#include <libc.h>#include <auth.h>#include <authsrv.h> voidmain(int, char **){	int i;	Nvrsafe safe; 	quotefmtinstall(); 	memset(&safe, 0, sizeof safe);	/*	 * readnvram can return -1 meaning nvram wasn't written,	 * but safe still holds good data.	 */	if(readnvram(&safe, 0) < 0 && safe.authid[0] == '\0') 		sysfatal("readnvram: %r"); 	/*	 *  only use nvram key if it is non-zero	 */	for(i = 0; i < DESKEYLEN; i++)		if(safe.machkey[i] != 0)			break;	if(i == DESKEYLEN)		sysfatal("bad key"); 	fmtinstall('H', encodefmt);	print("key proto=p9sk1 user=%q dom=%q !hex=%.*H !password=______\n", 		safe.authid, safe.authdom, DESKEYLEN, safe.machkey);	exits(0);}