10.18 Linux下网卡重命名

A: lgx@nsfocus 2005-11-22 10:09

--------------------------------------------------------------------------
/*
 * gcc -Wall -pipe -O3 -s -o ifname ifname.c
 */
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/ether.h>
#include <errno.h>

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

    if ( 3 != argc )
    {
        fprintf( stderr, "Usage: %s old_name new_name\n", argv[0] );
        return( -1 );
    }
    s   = socket( PF_INET, SOCK_DGRAM, 0 );
    /*
     * 这里有溢出，懒得管了
     */
    strcpy( ifr.ifr_name, argv[1] );
    strcpy( ifr.ifr_newname, argv[2] );
    if ( ioctl( s, SIOCSIFNAME, &ifr ) < 0 )
    {
        perror( "SIOCSIFNAME" );
    }
    close( s );
    return( 0 );
}  /* end of main */
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# ifconfig eth1 down
# ./ifname eth1 lgx
# ifconfig lgx up