/* Copyright (C) 1992-2018 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 <unistd.h>

#include <include/sys/stat.h>

#include <stdlib.h>

#include <string.h>

/* Return a malloc'd string containing the current directory name.

   If the environment variable `PWD' is set, and its value is correct,

   that value is used.  */

char *

get_current_dir_name (void)

{

  char *pwd;

  struct stat64 dotstat, pwdstat;

  pwd = getenv ("PWD");

  if (pwd != NULL

      && stat64 (".", &dotstat) == 0

      && stat64 (pwd, &pwdstat) == 0

      && pwdstat.st_dev == dotstat.st_dev

      && pwdstat.st_ino == dotstat.st_ino)

    /* The PWD value is correct.  Use it.  */

    return __strdup (pwd);

  return __getcwd ((char *) NULL, 0);

}