在linux下 获取本机MAC地址的函数

//获取本机MAC地址函数QString GetLocalMac() { int sock_mac; struct ifreq ifr_mac; char mac_addr[30]; sock_mac = socket( AF_INET, SOCK_STREAM, 0 ); if( sock_mac == -1) { perror("create socket falise...mac/n"); return ""; } memset(&ifr_mac,0,sizeof(ifr_mac)); strncpy(ifr_mac.ifr_name, "eth0", sizeof(ifr_mac.ifr_name)-1); if( (ioctl( sock_mac, SIOCGIFHWADDR, &ifr_mac)) < 0) { printf("mac ioctl error/n"); return ""; } sprintf(mac_addr,"%02x%02x%02x%02x%02x%02x", (unsigned char)ifr_mac.ifr_hwaddr.sa_data[0], (unsigned char)ifr_mac.ifr_hwaddr.sa_data[1], (unsigned char)ifr_mac.ifr_hwaddr.sa_data[2], (unsigned char)ifr_mac.ifr_hwaddr.sa_data[3], (unsigned char)ifr_mac.ifr_hwaddr.sa_data[4], (unsigned char)ifr_mac.ifr_hwaddr.sa_data[5]); printf("local mac:%s /n",mac_addr); close( sock_mac ); return QString( mac_addr ); }