/* Tests of stat.

   Copyright (C) 2009-2020 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

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

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Eric Blake <ebb9@byu.net>, 2009.  */

/* This file is designed to test both stat(n,buf) and

   fstatat(AT_FDCWD,n,buf,0).  FUNC is the function to test.  Assumes

   that BASE and ASSERT are already defined, and that appropriate

   headers are already included.  If PRINT, warn before skipping

   symlink tests with status 77.  */

static int

test_stat_func (int (*func) (char const *, struct stat *), bool print)

{

  struct stat st1;

  struct stat st2;

  char *cwd = getcwd (NULL, 0);

  ASSERT (cwd);

  ASSERT (func (".", &st1) == 0);

  ASSERT (func ("./", &st2) == 0);

#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)

  ASSERT (SAME_INODE (st1, st2));

#endif

  ASSERT (func (cwd, &st2) == 0);

#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)

  ASSERT (SAME_INODE (st1, st2));

#endif

  ASSERT (func ("/", &st1) == 0);

  ASSERT (func ("///", &st2) == 0);

#if !(defined _WIN32 && !defined __CYGWIN__ && !_GL_WINDOWS_STAT_INODES)

  ASSERT (SAME_INODE (st1, st2));

#endif

  errno = 0;

  ASSERT (func ("", &st1) == -1);

  ASSERT (errno == ENOENT);

  errno = 0;

  ASSERT (func ("nosuch", &st1) == -1);

  ASSERT (errno == ENOENT);

  errno = 0;

  ASSERT (func ("nosuch/", &st1) == -1);

  ASSERT (errno == ENOENT);

  ASSERT (close (creat (BASE "file", 0600)) == 0);

  ASSERT (func (BASE "file", &st1) == 0);

  errno = 0;

  ASSERT (func (BASE "file/", &st1) == -1);

  ASSERT (errno == ENOTDIR);

  /* Now for some symlink tests, where supported.  We set up:

     link1 -> directory

     link2 -> file

     link3 -> dangling

     link4 -> loop

     then test behavior with trailing slash.

  */

  if (symlink (".", BASE "link1") != 0)

    {

      ASSERT (unlink (BASE "file") == 0);

      if (print)

        fputs ("skipping test: symlinks not supported on this file system\n",

               stderr);

      return 77;

    }

  ASSERT (symlink (BASE "file", BASE "link2") == 0);

  ASSERT (symlink (BASE "nosuch", BASE "link3") == 0);

  ASSERT (symlink (BASE "link4", BASE "link4") == 0);

  ASSERT (func (BASE "link1/", &st1) == 0);

  ASSERT (S_ISDIR (st1.st_mode));

  errno = 0;

  ASSERT (func (BASE "link2/", &st1) == -1);

  ASSERT (errno == ENOTDIR);

  errno = 0;

  ASSERT (func (BASE "link3/", &st1) == -1);

  ASSERT (errno == ENOENT);

  errno = 0;

  ASSERT (func (BASE "link4/", &st1) == -1);

  ASSERT (errno == ELOOP);

  /* Cleanup.  */

  ASSERT (unlink (BASE "file") == 0);

  ASSERT (unlink (BASE "link1") == 0);

  ASSERT (unlink (BASE "link2") == 0);

  ASSERT (unlink (BASE "link3") == 0);

  ASSERT (unlink (BASE "link4") == 0);

  free (cwd);

  return 0;

}