readblk
ssize_t readblk(union dinode *, off_t, struct bufarea **);
if (readblk(dp, off, &bp) != sblock->fs_bsize ||
if (readblk(dp, off, &bp) != sblock->fs_bsize ||
if (readblk(dp, 0, &hbp) != sblock->fs_bsize ||
if (readblk(dp, 0, &hbp) != sblock->fs_bsize ||
if (readblk(dp, i * sblock->fs_bsize, &bp)
if (readblk(dp, 0, &hbp) != sblock->fs_bsize ||
if (readblk(dp, 0, &bp) != sblock->fs_bsize ||