linux修改ip地址c语言

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <arpa/inet.h>

int main(int argc, char *argv[]) {
    if (argc != 4) {
        fprintf(stderr, "Usage: %s <interface> <ip_address> <netmask>\n", argv[0]);
        return 1;
    }

    const char *interface = argv[1];
    const char *ip_address = argv[2];
    const char *netmask = argv[3];

    int sockfd;
    struct ifreq ifr;
    struct sockaddr_in *addr;

    sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0) {
        perror("socket");
        return 1;
    }

    memset(&ifr, 0, sizeof(ifr));
    strncpy(ifr.ifr_name, interface, IFNAMSIZ - 1);

    addr = (struct sockaddr_in *)&ifr.ifr_addr;
    addr->sin_family = AF_INET;
    addr->sin_port = htons(0);

    if (inet_pton(AF_INET, ip_address, &addr->sin_addr) <= 0) {
        perror("inet_pton");
        close(sockfd);
        return 1;
    }

    if (ioctl(sockfd, SIOCSIFADDR, &ifr) < 0) {
        perror("ioctl(SIOCSIFADDR)");
        close(sockfd);
        return 1;
    }

    memset(&ifr, 0, sizeof(ifr));
    strncpy(ifr.ifr_name, interface, IFNAMSIZ - 1);

    addr = (struct sockaddr_in *)&ifr.ifr_netmask;
    addr->sin_family = AF_INET;
    addr->sin_port = htons(0);

    if (inet_pton(AF_INET, netmask, &addr->sin_addr) <= 0) {
        perror("inet_pton");
        close(sockfd);
        return 1;
    }

    if (ioctl(sockfd, SIOCSIFNETMASK, &ifr) < 0) {
        perror("ioctl(SIOCSIFNETMASK)");
        close(sockfd);
        return 1;
    }

    printf("IP address %s and netmask %s set on interface %s\n", ip_address, netmask, interface);
    close(sockfd);
    return 0;
}