Buf*	bopen(long (*)(Buf*, void*, long, ulong), int, int, int);long	bread(Buf*, void*, long, vlong);void	bterm(Buf*);long	bufread(Otrack*, void*, long, vlong);long	bufwrite(Otrack*, void*, long);long	bwrite(Buf*, void*, long);char*	disctype(Drive *drive);void	*emalloc(ulong);char*	geterrstr(void);Drive*	mmcprobe(Scsi*);