/* Copyright (C) 2000-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <stdlib.h>

#include <netdb.h>

#include "nsswitch.h"

void *

__nss_getent (getent_r_function func, void **resbuf, char **buffer,

	      size_t buflen, size_t *buffer_size, int *h_errnop)

{

  void *result;

  if (*buffer == NULL)

    {

      *buffer_size = buflen;

      *buffer = malloc (*buffer_size);

    }

  while (*buffer != NULL

	 && func (resbuf, *buffer, *buffer_size, &result, h_errnop) == ERANGE

	 && (h_errnop == NULL || *h_errnop == NETDB_INTERNAL))

    {

      char *new_buf;

      *buffer_size *= 2;

      new_buf = realloc (*buffer, *buffer_size);

      if (new_buf == NULL)

	{

	  /* We are out of memory.  Free the current buffer so that the

	     process gets a chance for a normal termination.  */

	  int save = errno;

	  free (*buffer);

	  __set_errno (save);

	}

      *buffer = new_buf;

    }

  if (*buffer == NULL)

    result = NULL;

  return result;

}