C++ (Cpp) __nss_ethers_lookupの例

コード例 #1

ファイル: ether_ntoh.c プロジェクト: AdvancedC/glibc

int
ether_ntohost (char *hostname, const struct ether_addr *addr)
{
  static service_user *startp;
  static lookup_function start_fct;
  service_user *nip;
  union
  {
    lookup_function f;
    void *ptr;
  } fct;
  int no_more;
  enum nss_status status = NSS_STATUS_UNAVAIL;
  struct etherent etherent;

  if (startp == NULL)
    {
      no_more = __nss_ethers_lookup (&nip, "getntohost_r", &fct.ptr);
      if (no_more)
	startp = (service_user *) -1;
      else
	{
	  startp = nip;
	  start_fct = fct.f;
	}
    }
  else
    {
      fct.f = start_fct;
      no_more = (nip = startp) == (service_user *) -1;
    }

  while (no_more == 0)
    {
      char buffer[1024];

      status = (*fct.f) (addr, &etherent, buffer, sizeof buffer, &errno);

      no_more = __nss_next2 (&nip, "getntohost_r", NULL, &fct.ptr, status, 0);
    }

  if (status == NSS_STATUS_SUCCESS)
    /* XXX This is a potential cause of trouble because the size of
       the HOSTNAME buffer is not known but the interface does not
       provide this information.  */
    strcpy (hostname, etherent.e_name);

  return status == NSS_STATUS_SUCCESS ? 0 : -1;
}

コード例 #2

ファイル: ether_hton.c プロジェクト: AubrCool/glibc

int
ether_hostton (const char *hostname, struct ether_addr *addr)
{
  static service_user *startp;
  static lookup_function start_fct;
  service_user *nip;
  union
  {
    lookup_function f;
    void *ptr;
  } fct;
  int no_more;
  enum nss_status status = NSS_STATUS_UNAVAIL;
  struct etherent etherent;

  if (startp == NULL)
    {
      no_more = __nss_ethers_lookup (&nip, "gethostton_r", &fct.ptr);
      if (no_more)
	startp = (service_user *) -1;
      else
	{
	  startp = nip;
	  start_fct = fct.f;
	}
    }
  else
    {
      fct.f = start_fct;
      no_more = (nip = startp) == (service_user *) -1;
    }

  while (no_more == 0)
    {
      char buffer[1024];

      status = (*fct.f) (hostname, &etherent, buffer, sizeof buffer, &errno);

      no_more = __nss_next2 (&nip, "gethostton_r", NULL, &fct.ptr, status, 0);
    }

  if (status == NSS_STATUS_SUCCESS)
    memcpy (addr, etherent.e_addr.ether_addr_octet,
	    sizeof (struct ether_addr));

  return status == NSS_STATUS_SUCCESS ? 0 : -1;
}