如何使用C程序获取机器的MAC地址？

#include<stdio.h>
#include <stdlib.h>
#include<string.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <ifaddrs.h>
#include <net/ethernet.h>

void get_mac_address(char *interface_name, unsigned char *mac_address) {
    struct ifreq ifr;
    int sock = socket(AF_INET, SOCK_DGRAM, 0);

    if (sock == -1) {
        perror("socket");
        return;
    }

    strncpy(ifr.ifr_name, interface_name, IFNAMSIZ);
    if (ioctl(sock, SIOCGIFHWADDR, &ifr) == -1) {
        perror("ioctl");
        return;
    }

    close(sock);

    memcpy(mac_address, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
}

int main() {
    char interface_name[] = "eth0"; // 您可以将此值更改为您的网络接口名称
    unsigned char mac_address[ETH_ALEN];

    get_mac_address(interface_name, mac_address);

    printf("MAC address of %s: %02X:%02X:%02X:%02X:%02X:%02X\n", interface_name, mac_address[0], mac_address[1], mac_address[2], mac_address[3], mac_address[4], mac_address[5]);

    return 0;
}