assert             84 mkfs.c           assert((BSIZE % sizeof(struct dinode)) == 0);
assert             85 mkfs.c           assert((BSIZE % sizeof(struct dirent)) == 0);
assert            118 mkfs.c           assert(rootino == ROOTINO);
assert            131 mkfs.c             assert(index(argv[i], '/') == 0);
assert            244 mkfs.c           assert(used < BSIZE*8);
assert            270 mkfs.c             assert(fbn < MAXFILE);