/* * Remove a directory entry after a call to namei, using * the auxiliary results it provided. The entry * ulr_offset contains the offset into the directory of the * entry to be eliminated. The ulr_count field contains the * size of the previous record in the directory. If this * is 0, the first entry is being deleted, so we need only * zero the inode number to mark the entry as free. If the * entry is not the first in the directory, we must reclaim * the space of the now empty record by adding the record size * to the size of the previous entry. */