typedef struct Method	Method;struct Method{	char	*name;	void	(*config)(Method*);	int	(*connect)(void);	char	*arg;};enum{	Statsz=	256,	Nbarg=	16,}; extern void	authentication(int);extern char*	bootdisk;extern char*	rootdir;extern int	(*cfs)(int);extern int	cpuflag;extern char	cputype[];extern int	fflag;extern int	kflag;extern Method	method[];extern void	(*pword)(int, Method*);extern char	sys[];extern uchar	hostkey[];extern uchar	statbuf[Statsz];extern int	bargc;extern char	*bargv[Nbarg];extern void	partitions(void); /* libc equivalent */extern int	cache(int);extern char*	checkkey(Method*, char*, char*);extern void	fatal(char*);extern void	getpasswd(char*, int);extern void	key(int, Method*);extern int	outin(char*, char*, int);extern int	plumb(char*, char*, int*, char*);extern int	readfile(char*, char*, int);extern long	readn(int, void*, long);extern void	run(char *file, ...);extern int	sendmsg(int, char*);extern void	setenv(char*, char*);extern void	settime(int, int, char*);extern void	srvcreate(char*, int);extern void	warning(char*);extern int	writefile(char*, char*, int);extern void	boot(int, char **);extern void	doauthenticate(int, Method*);extern int	parsefields(char*, char**, int, char*); /* methods */extern void	configil(Method*);extern int	connectil(void); extern void	configtcp(Method*);extern int	connecttcp(void); extern void	configlocal(Method*);extern int	connectlocal(void); extern void	configpaq(Method*);extern int	connectpaq(void); extern void	configembed(Method*);extern int	connectembed(void); extern void	configip(int, char**, int); /* hack for passing authentication address */extern char	*authaddr;