ISO_copyr_id
copyfile = (char *)ISO_copyr_id(h->iso_buf);
copyfile = (char *)ISO_copyr_id(h->unix_buf);
copystring(copyfile, (char *)ISO_copyr_id(unix_buf), 37);
copystring(copyfile, (char *)ISO_copyr_id(iso_buf), 37);
copyfile = (char *)ISO_copyr_id(iso_buf);
copyfile = (char *)ISO_copyr_id(unix_buf);
#define ISO_COPYR_ID(x) ISO_copyr_id(x)