linuxc擷取IP地址

linuxc擷取IP地址

#include #include #include #include #include #include #include int main(int argc, char **argv){    int sockfd;    struct ifreq ifr;    char *ifname="eth0";    strncpy(ifr.ifr_name, ifname, IFNAMSIZ-1);    sockfd = socket(AF_INET, SOCK_STREAM, 0);    if(ioctl(sockfd, SIOCGIFADDR, &ifr) == -1)    {        printf("Error\n");        return;    }    struct sockaddr_in *myaddr;    myaddr = (struct sockaddr_in*)&(ifr.ifr_addr);    printf("IP: %s\n", inet_ntoa(myaddr->sin_addr));}