display_partition
display_partition(f, lp, i, unit);
display_partition(stdout, lp, DL_PARTNAME2NUM(p1), 0);
display_partition(stdout, lp, DL_PARTNAME2NUM(p2), 0);
display_partition(stdout, lp, i, unit);
void display_partition(FILE *, const struct disklabel *, int, char);