LINUX32_IFNAMSIZ
lreq.ifr_name[LINUX32_IFNAMSIZ-1] = '\0'; /* just in case */
index < LINUX32_IFNAMSIZ && lreq.ifr_name[index] != '\0';
MIN(LINUX32_IFNAMSIZ, IFNAMSIZ));
char ifrn_name[LINUX32_IFNAMSIZ];