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

   This file is part of the GNU C Library.

   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 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 <errno.h>

#include <hesiod.h>

#include <pwd.h>

#include <nss.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

/* Get the declaration of the parser function.  */

#define ENTNAME pwent

#define STRUCTURE passwd

#define EXTERN_PARSER

#include <nss/nss_files/files-parse.c>

enum nss_status

_nss_hesiod_setpwent (int stayopen)

{

  return NSS_STATUS_SUCCESS;

}

enum nss_status

_nss_hesiod_endpwent (void)

{

  return NSS_STATUS_SUCCESS;

}

static enum nss_status

lookup (const char *name, const char *type, struct passwd *pwd,

	char *buffer, size_t buflen, int *errnop)

{

  struct parser_data *data = (void *) buffer;

  size_t linebuflen;

  void *context;

  char **list;

  int parse_res;

  size_t len;

  int olderr = errno;

  if (hesiod_init (&context) < 0)

    return NSS_STATUS_UNAVAIL;

  list = hesiod_resolve (context, name, type);

  if (list == NULL)

    {

      int err = errno;

      hesiod_end (context);

      __set_errno (olderr);

      return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;

    }

  linebuflen = buffer + buflen - data->linebuffer;

  len = strlen (*list) + 1;

  if (linebuflen < len)

    {

      hesiod_free_list (context, list);

      hesiod_end (context);

      *errnop = ERANGE;

      return NSS_STATUS_TRYAGAIN;

    }

  memcpy (data->linebuffer, *list, len);

  hesiod_free_list (context, list);

  hesiod_end (context);

  parse_res = _nss_files_parse_pwent (buffer, pwd, data, buflen, errnop);

  if (parse_res < 1)

    {

      __set_errno (olderr);

      return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;

    }

  return NSS_STATUS_SUCCESS;

}

enum nss_status

_nss_hesiod_getpwnam_r (const char *name, struct passwd *pwd,

			char *buffer, size_t buflen, int *errnop)

{

  return lookup (name, "passwd", pwd, buffer, buflen, errnop);

}

enum nss_status

_nss_hesiod_getpwuid_r (uid_t uid, struct passwd *pwd,

			char *buffer, size_t buflen, int *errnop)

{

  char uidstr[21];	/* We will probably never have a gid_t with more

			   than 64 bits.  */

  snprintf (uidstr, sizeof uidstr, "%d", uid);

  return lookup (uidstr, "uid", pwd, buffer, buflen, errnop);

}