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

int main(int argc, char ** argv) {
  if (argc < 2) {
    printf("Usage: %s hostname", argv[0]);
    exit(-1);
  }

  struct hostent * hp = gethostbyname(argv[1]);

  if (hp == NULL) {
    printf("gethostbyname() failed\n");
  } else {
    printf("%s = ", hp - > h_name);
    unsigned int i = 0;
    while (hp - > h_addr_list[i] != NULL) {
      printf("%s ", inet_ntoa( * (struct in_addr * )(hp - > h_addr_list[i])));
      i++;
    }
    printf("\n");
  }
}