check DNS entries

dig with c program in linux

/*
*
=====================================================================================
*
*       Filename:  dig.c
*
*    Description:  dns resolve
*
*        Version:  1.0
*        Created:  22/04/15 21:24:19
*       Revision:  none
*       Compiler:  gcc
*
*         Author:  teaddict (), cyberasker@gmail.com
*        Company:  
*
*
=====================================================================================
*/
#include<stdio.h>
#include<stdlib.h>
#include<arpa/inet.h>
#include<netdb.h>
int main(int argc,char **argv)
{
char dest[]="anadolu.edu.tr";     //adres ataması
struct hostent *hstinfo;
struct in_addr **addr_list;

//ARGUMAN ALARAK : ./dig google.com
/*
hstinfo=gethostbyname(argv[1]);
if(hstinfo == NULL) {
         fprintf(stderr, "rlogin: %s: unknown hostn", argv[1]);
         exit(2);
}
*/
if((hstinfo=gethostbyname(dest))==NULL)
{ printf("not foundn"); }

addr_list=(struct in_addr **)hstinfo->h_addr_list;
printf("DNS lookup [%s] address
[%s]n",hstinfo->h_name,inet_ntoa(*addr_list[0]));

return 0;
}

https://github.com/teaddict/system_programming/blob/master/ders5/dig.c