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#include 
   
    #include 
    
     int tnfs_getNetMac(){    struct ifreq ifreq;    int sock;    if((sock=socket(AF_INET,SOCK_STREAM,0)) <0)    {        perror( "socket ");        return 2;    }    char *device = "ens33"; // "eth0"    strcpy(ifreq.ifr_name,device);    if(ioctl(sock,SIOCGIFHWADDR,&ifreq) <0)    {        perror( "ioctl ");        return 3;    }    printf( "%02x:%02x:%02x:%02x:%02x:%02x\n ",            (unsigned   char)ifreq.ifr_hwaddr.sa_data[0],            (unsigned   char)ifreq.ifr_hwaddr.sa_data[1],            (unsigned   char)ifreq.ifr_hwaddr.sa_data[2],            (unsigned   char)ifreq.ifr_hwaddr.sa_data[3],            (unsigned   char)ifreq.ifr_hwaddr.sa_data[4],            (unsigned   char)ifreq.ifr_hwaddr.sa_data[5]);    return 0;}int main(){   tnfs_getNetMac();   return 0;}
    
   

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