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  static int
      14  do_test (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  }
      65  
      66  #define TEST_FUNCTION do_test ()
      67  #include "../test-skeleton.c"