#include   "unp.h"

int
main(int argc, char **argv)
{
   char         *ptr, **pptr;
   char         str[INET_ADDRSTRLEN];
   struct hostent   *hptr;
   in_addr_t  inetaddr;

   while (--argc > 0) {
      ptr = *++argv;
      if ( (inetaddr = inet_addr(ptr)) != -1){
         if ((hptr = gethostbyaddr((char *)&inetaddr, sizeof(inetaddr), AF_INET)) == NULL) {
            printf("\t(gethostbyaddr failed %s)\n", ptr);
            continue;

         }
      } else{
         if ( (hptr = gethostbyname(ptr)) == NULL) {
            printf("\t(gethostbyaddr failed %s)\n", ptr);
            continue;
         }

      }
      printf("official hostname: %s\n", hptr->h_name);

      for (pptr = hptr->h_aliases; *pptr != NULL; pptr++)
         printf("\talias: %s\n", *pptr);

      switch (hptr->h_addrtype) {
      case AF_INET:
         pptr = hptr->h_addr_list;
         for ( ; *pptr != NULL; pptr++)
            printf("\taddress: %s\n",
                Inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));
         break;

      default:
         err_ret("unknown address type");
         break;
      }
   }
   exit(0);
}