BPB 60 fs.c for(b = 0; b < sb.size; b += BPB){ BPB 62 fs.c for(bi = 0; bi < BPB && b + bi < sb.size; bi++){ BPB 86 fs.c bi = b % BPB; BPB 47 fs.h #define BBLOCK(b, sb) (b/BPB + sb.bmapstart)