enum {	Tscsi	= 1,	Tata	= 2, 	Xseg	= 3,	/* segmented download */	Xfull	= 7,	/* full download */ 	Nrb	= 32,	Pathlen	= 256,}; typedef struct Dtype Dtype;typedef struct Dlparm Dlparm;typedef struct Sdisk Sdisk; struct Dtype {	int	type;	char	*tname;	int	(*probe)(Sdisk*);	int	(*dlmc)(Sdisk*, char*, uint);}; struct Dlparm {	int	dlmode;	int	maxxfr;}; struct Sdisk {	Sdisk	*next;	Dtype	*t;	Dlparm;	int	fd;	Sfis;	char	path[Pathlen];	char	name[28];}; int	scsiprobe(Sdisk*);int	scsidl(Sdisk*, char*, uint);int	ataprobe(Sdisk*);int	atadl(Sdisk*, char*, uint); void	eprint(Sdisk*, char *, ...);