如何获取本机MAC地址

struct ifreq ifr; int fd; fd=socket(AF_INET,SOCK_DGRAM,0); strcpy(ifr.ifr_name,"eth0"); ifr.ifr_addr.sa_family=AF_INET; ioctl(fd,SIOCGIFHWADDR,&ifr); puts(ifr.ifr_hwaddr.sa_data);