linux下C语言获取网卡MAC地址

#include
#include
#include <string.h>
#include
#include
#include
#include in.h>
#include if.h>

int main(int argc, char *argv[])
{
struct ifreq ifreq;
int sock &＃61; 0;
char mac[32] &＃61; "";

if(argc <2){
printf("Usage: ./main eth0");
return 1;
}

sock &＃61; socket(AF_INET,SOCK_STREAM,0);
if(sock <0)
{
perror("error sock");
return 2;
}

strcpy(ifreq.ifr_name,argv[1]);
if(ioctl(sock,SIOCGIFHWADDR,&ifreq) <0)
{
perror("error ioctl");
return 3;
}

int i &＃61; 0;
for(i &＃61; 0; i <6; i&＃43;&＃43;){
sprintf(mac&＃43;3*i, "%02X:", (unsigned char)ifreq.ifr_hwaddr.sa_data[i]);
}
mac[strlen(mac) - 1] &＃61; 0;
printf("MAC: %s\n", mac);

return 0;
}