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 );}