inet/tst-gethnm.c

   1 /* Based on a test case by grd@algonet.se.  */
   2
   3 #include <netdb.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7 #include <unistd.h>
   8 #include <sys/param.h>
   9 #include <sys/socket.h>
  10 #include <netinet/in.h>
  11 #include <arpa/inet.h>
  12
  13 int
  14 main (void)
  15 {
  16   struct hostent *ent;
  17   struct in_addr hostaddr;
  18   int result = 0;
  19
  20   inet_aton ("127.0.0.1", (struct in_addr *) &hostaddr.s_addr);
  21   ent = gethostbyaddr (&hostaddr, sizeof (hostaddr), AF_INET);
  22   if (ent == NULL)
  23     puts ("gethostbyaddr (...) == NULL");
  24   else
  25     {
  26       puts ("Using gethostbyaddr(..):");
  27       printf ("h_name: %s\n", ent->h_name);
  28
  29       if (ent->h_aliases == NULL)
  30         puts ("ent->h_aliases == NULL");
  31       else
  32         printf ("h_aliases[0]: %s\n", ent->h_aliases[0]);
  33     }
  34
  35   ent = gethostbyname ("127.0.0.1");
  36   if (ent == NULL)
  37     {
  38       puts ("gethostbyname (\"127.0.0.1\") == NULL");
  39       result = 1;
  40     }
  41   else
  42     {
  43       printf ("\nNow using gethostbyname(..):\n");
  44       printf ("h_name: %s\n", ent->h_name);
  45       if (strcmp (ent->h_name, "127.0.0.1") != 0)
  46         {
  47           puts ("ent->h_name != \"127.0.0.1\"");
  48           result = 1;
  49         }
  50
  51       if (ent->h_aliases == NULL)
  52         {
  53           puts ("ent->h_aliases == NULL");
  54           result = 1;
  55         }
  56       else
  57         {
  58           printf ("h_aliases[0]: %s\n", ent->h_aliases[0]);
  59           result |= ent->h_aliases[0] != NULL;
  60         }
  61     }
  62
  63   return result;
  64 }