首页 / 软件开发 / C语言 / 用C语言得到Linux主机的IP地址

#include <stdio.h>;#include <sys/types.h>;#include <sys/socket.h>;#include <sys/ioctl.h>;#include <netinet/in.h>;#include <net/if.h>;#include <net/if_arp.h>;#include <arpa/inet.h>;#include <errno.h>;#define ETH_NAME"eth0"int main（）{int sock;struct sockaddr_in sin;struct ifreq ifr;sock = socket（AF_INET, SOCK_DGRAM, 0）;if （sock == -1）{perror（"socket"）;return -1;}strncpy（ifr.ifr_name, ETH_NAME, IFNAMSIZ）;ifr.ifr_name[IFNAMSIZ - 1] = 0;if （ioctl（sock, SIOCGIFADDR, &ifr） < 0）{perror（"ioctl"）;return -1;}memcpy（&sin, &ifr.ifr_addr, sizeof（sin））;fprintf（stdout, "eth0: %s
", inet_ntoa（sin.sin_addr））;return 0;}