/* Copyright (C) 2015-2018 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 <nss.h>

#include <pwd.h>

#include <stdbool.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <support/support.h>

int

do_test (void)

{

  __nss_configure_lookup ("passwd", "files");

  /* Count the number of entries in the password database, and fetch

     data from the first and last entries.  */

  size_t count = 0;

  struct passwd * pw;

  char *first_name = NULL;

  uid_t first_uid = 0;

  char *last_name = NULL;

  uid_t last_uid = 0;

  setpwent ();

  while ((pw  = getpwent ()) != NULL)

    {

      if (first_name == NULL)

	{

	  first_name = xstrdup (pw->pw_name);

	  first_uid = pw->pw_uid;

	}

      free (last_name);

      last_name = xstrdup (pw->pw_name);

      last_uid = pw->pw_uid;

      ++count;

    }

  endpwent ();

  if (count == 0)

    {

      printf ("No entries in the password database.\n");

      return 0;

    }

  /* Try again, this time interleaving with name-based and UID-based

     lookup operations.  The counts do not match if the interleaved

     lookups affected the enumeration.  */

  size_t new_count = 0;

  setpwent ();

  while ((pw  = getpwent ()) != NULL)

    {

      if (new_count == count)

	{

	  printf ("Additional entry in the password database.\n");

	  return 1;

	}

      ++new_count;

      struct passwd *pw2 = getpwnam (first_name);

      if (pw2 == NULL)

	{

	  printf ("getpwnam (%s) failed: %m\n", first_name);

	  return 1;

	}

      pw2 = getpwnam (last_name);

      if (pw2 == NULL)

	{

	  printf ("getpwnam (%s) failed: %m\n", last_name);

	  return 1;

	}

      pw2 = getpwuid (first_uid);

      if (pw2 == NULL)

	{

	  printf ("getpwuid (%llu) failed: %m\n",

		  (unsigned long long) first_uid);

	  return 1;

	}

      pw2 = getpwuid (last_uid);

      if (pw2 == NULL)

	{

	  printf ("getpwuid (%llu) failed: %m\n",

		  (unsigned long long) last_uid);

	  return 1;

	}

    }

  endpwent ();

  if (new_count < count)

    {

      printf ("Missing entry in the password database.\n");

      return 1;

    }

  return 0;

}

#define TIMEOUT 300

#include <support/test-driver.c>