CLUSTER_ROOTDIR
pcfsp->f_dclust = CLUSTER_ROOTDIR;
rd = blk == CLUSTER_ROOTDIR ? 1 : 0;
rd = (blk == CLUSTER_ROOTDIR) ? 1 : 0;
int rd = (dir_blk == CLUSTER_ROOTDIR ? 1 : 0);
dir_blk = CLUSTER_ROOTDIR;
dp->d_cluster = CLUSTER_ROOTDIR;