1 Buf* bopen(long (*)(Buf*, void*, long, ulong), int, int, int); 2 long bread(Buf*, void*, long, vlong); 3 void bterm(Buf*); 4 long bufread(Otrack*, void*, long, vlong); 5 long bufwrite(Otrack*, void*, long); 6 long bwrite(Buf*, void*, long); 7 char* disctype(Drive *drive); 8 void *emalloc(ulong); 9 char* geterrstr(void); 10 Drive* mmcprobe(Scsi*); 11