#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
	FILE *po;	char buf[1024];	char *a;	char *b = "inet addr:";	//char *c = "inet addr:";	char last[16];	char lo[16];	char lo2[16];
	printf("Content-Type:text/html\n\n");//頭標信號
	printf("<TITLE>顯示系統(tǒng)網(wǎng)絡(luò)信息</TITLE>\n");
	printf("<HR>");
		if((po = popen("ifconfig","r")) == NULL) {    //執(zhí)行ifconfig,得到相關(guān)的IP信息		printf("bad\n");		//exit 0;	}	while(fgets(buf,1024,po)) {           		if(memcmp(buf,"eth0",4) == 0) {         //只比較兩個字符			//printf("ok\n");			//printf("%s\n",buf);			//a = strstr(buf,b);			//printf("lo:%s\n",a);					}		if((a = strstr(buf,b)) != NULL) {   //獲得a所指向地址			//printf("find it inet addr\n");			//a = a-strlen(c);			a += strlen(b);    //獲得需要輸出字符串的地址			sscanf(a,"%s Bcast:192.168.18.255 %s ",last,lo2);//對字符串進行比對，滿足要求的輸出			//sscanf(a,"%s %s",last[0]),last[1]);			printf("<P>系統(tǒng)的網(wǎng)絡(luò)信息顯示如下：\n</p>");			printf("IP addr:%s\n",last);			//printf("bcast:%s\n",lo);			printf("Net%s\n",lo2);			printf("</br>");			printf("</br>");			printf("</br>");
						//fflush(stdout);		}		else			printf("\n");				//return 0;	}		printf("<a href=../sys_form.html>返回首頁</a>");}