child_info
child_info_t child_info;
child_info.fru_hdl = fruparent;
child_info.fru_cnt = max_children;
child_info.frus = (void *)fruchildren;
if (ioctl(frufd, SGFRU_GETCHILDLIST, &child_info) == 0) {
*num_childrenp = child_info.fru_cnt;