int length = snprintf(x, 10 + 1, "%d", tracked_fds_list[i]);
if (length >= 10 + 1) {
/* Integer too big to fit the buffer, skip it. */
int length = snprintf(x, 10 + 1, "%d", tracked_fds_list[i]);
if (length >= 10 + 1) {
/* Integer too big to fit the buffer, skip it. */