#include <stdio.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main(int argc, char *argv[])
{
    struct hostent *h;
    char **p;
    struct in_addr t;

    if (argc <2) {
       fprintf(stderr, "usage %s hostname\n",argv[0]);
       exit(0);
    }

    h = gethostbyname(argv[1]);
    if (h == NULL) {
      fprintf(stderr, "error, no such host %s\n",argv[1]);
      exit(0);
    }
    printf("h_name is %s\n",h->h_name);
    p = h->h_aliases;
    while (*p != NULL) {
	 printf("Alias: %s\n",*p);
         p++;
    }
    p = h->h_addr_list;
    while (*p != NULL) {
      memcpy((char *)&t,*p,4);     
      printf("IPv4 addr %s\n",inet_ntoa(t));
      p++;
    }
    printf("Good bye\n");
    return 0;
}