/* Copyright (c) 1997-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.

   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 <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <rpcsvc/nis.h>

#include <shlib-compat.h>

#include "nis_xdr.h"

typedef bool_t (*iofct_t) (XDR *, void *);

typedef void (*freefct_t) (void *);

static void *

read_nis_obj (const char *name, iofct_t readfct, freefct_t freefct,

	      size_t objsize)

{

  FILE *in = fopen (name, "rce");

  if (in == NULL)

    return NULL;

  void *obj = calloc (1, objsize);

  if (obj != NULL)

    {

      XDR xdrs;

      xdrstdio_create (&xdrs, in, XDR_DECODE);

      bool_t status = readfct (&xdrs, obj);

      xdr_destroy (&xdrs);

      if (!status)

	{

	  freefct (obj);

	  obj = NULL;

	}

    }

  fclose (in);

  return obj;

}

static bool_t

write_nis_obj (const char *name, const void *obj, iofct_t writefct)

{

  FILE *out = fopen (name, "wce");

  if (out == NULL)

    return FALSE;

  XDR xdrs;

  xdrstdio_create (&xdrs, out, XDR_ENCODE);

  bool_t status = writefct (&xdrs, (void *) obj);

  xdr_destroy (&xdrs);

  fclose (out);

  return status;

}

static const char cold_start_file[] = "/var/nis/NIS_COLD_START";

directory_obj *

readColdStartFile (void)

{

  return read_nis_obj (cold_start_file, (iofct_t) _xdr_directory_obj,

		       (freefct_t) nis_free_directory, sizeof (directory_obj));

}

libnsl_hidden_nolink_def (readColdStartFile, GLIBC_2_1)

bool_t

writeColdStartFile (const directory_obj *obj)

{

  return write_nis_obj (cold_start_file, obj, (iofct_t) _xdr_directory_obj);

}

libnsl_hidden_nolink_def (writeColdStartFile, GLIBC_2_1)

nis_object *

nis_read_obj (const char *name)

{

  return read_nis_obj (name, (iofct_t) _xdr_nis_object,

		       (freefct_t) nis_free_object, sizeof (nis_object));

}

libnsl_hidden_nolink_def (nis_read_obj, GLIBC_2_1)

bool_t

nis_write_obj (const char *name, const nis_object *obj)

{

  return write_nis_obj (name, obj, (iofct_t) _xdr_nis_object);

}

libnsl_hidden_nolink_def (nis_write_obj, GLIBC_2_1)