Linux 下网卡重命名

$ cat ifname.c
#include <stdio.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <string.h>
#include <net/if.h>
#include <netinet/ether.h>

int main(int argc,char **argv)
{
    int s;
    struct ifreq ifr;

    if (argc != 3)
    {
        fprintf(stderr,"Usage: %s old_name new_name\n",argv[0]);
        exit(-1);
    }

    s = socket(PF_INET, SOCK_DGRAM, 0);
    strcpy(ifr.ifr_name,argv[1]);
    strcpy(ifr.ifr_newname,argv[2]);
    if (ioctl(s, SIOCSIFNAME, &ifr) < 0)
    {
        perror("SIOCSIFNAME");
    }

    close(s);
    return 0;
}

# ifconfig eth1 down
# ./ifname eth1 lgx
# ifconfig lgx up