text: #include <netdb.h>
  #include <stdio.h>
  #include <sys/socket.h>
  
  static int
  do_test (void)
  {
    int retval = 0;
  
    struct sockaddr_in6 s;
    s.sin6_family = AF_INET6;
    s.sin6_port = htons (80);
    s.sin6_flowinfo = 0;
    s.sin6_addr = (struct in6_addr) IN6ADDR_ANY_INIT;
    s.sin6_scope_id = 0;
    char buf[1000];
    buf[0] = '\0';
    int r = getnameinfo((struct sockaddr *) &s, sizeof (s), buf, sizeof (buf),
  		      NULL, 0, NI_NUMERICSERV);
    printf("r = %d, buf = \"%s\"\n", r, buf);
    if (r != 0)
      {
        puts ("failed without NI_NAMEREQD");
        retval = 1;
      }
  
    buf[0] = '\0';
    r = getnameinfo((struct sockaddr *) &s, sizeof (s), buf, sizeof (buf),
  		  NULL, 0, NI_NUMERICSERV | NI_NAMEREQD);
    printf("r = %d, buf = \"%s\"\n", r, buf);
    if (r != EAI_NONAME)
      {
        puts ("did not fail with EAI_NONAME with NI_NAMEREQD set");
        retval = 1;
      }
  
    return retval;
  }
  
  #define TEST_FUNCTION do_test ()
  #include "../test-skeleton.c"
  