/* Tests of rmdir.

   Copyright (C) 2009-2018 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 rmdir(n) and

   unlinkat(AT_FDCWD,n,AT_REMOVEDIR).  FUNC is the function to test.

   Assumes that BASE and ASSERT are already defined, and that

   appropriate headers are already included.  If PRINT, then warn

   before returning status 77 when symlinks are unsupported.  */

static int

test_rmdir_func (int (*func) (char const *name), bool print)

{

  /* Setup.  */

  ASSERT (mkdir (BASE "dir", 0700) == 0);

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

  /* Basic error conditions.  */

  errno = 0;

  ASSERT (func ("") == -1);

  ASSERT (errno == ENOENT);

  errno = 0;

  ASSERT (func (BASE "nosuch") == -1);

  ASSERT (errno == ENOENT);

  errno = 0;

  ASSERT (func (BASE "nosuch/") == -1);

  ASSERT (errno == ENOENT);

  errno = 0;

  ASSERT (func (".") == -1);

  ASSERT (errno == EINVAL || errno == EBUSY);

  /* Resulting errno after ".." or "/" is too varied to test; it is

     reasonable to see any of EINVAL, EBUSY, EEXIST, ENOTEMPTY,

     EACCES, EPERM.  */

  ASSERT (func ("..") == -1);

  ASSERT (func ("/") == -1);

  ASSERT (func ("///") == -1);

  errno = 0;

  ASSERT (func (BASE "dir/file/") == -1);

  ASSERT (errno == ENOTDIR);

  /* Non-empty directory.  */

  errno = 0;

  ASSERT (func (BASE "dir") == -1);

  ASSERT (errno == EEXIST || errno == ENOTEMPTY);

  /* Non-directory.  */

  errno = 0;

  ASSERT (func (BASE "dir/file") == -1);

  ASSERT (errno == ENOTDIR);

  /* Empty directory.  */

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

  errno = 0;

  ASSERT (func (BASE "dir/.//") == -1);

  ASSERT (errno == EINVAL || errno == EBUSY || errno == EEXIST

          || errno == ENOTEMPTY);

  ASSERT (func (BASE "dir") == 0);

  /* Test symlink behavior.  Specifying trailing slash should remove

     referent directory (POSIX), or cause ENOTDIR failure (Linux), but

     not touch symlink.  We prefer the Linux behavior for its

     intuitiveness (especially compared to rmdir("symlink-to-file/")),

     but not enough to penalize POSIX systems with an rpl_rmdir.  */

  if (symlink (BASE "dir", BASE "link") != 0)

    {

      if (print)

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

               stderr);

      return 77;

    }

  ASSERT (mkdir (BASE "dir", 0700) == 0);

  errno = 0;

  if (func (BASE "link/") == 0)

    {

      struct stat st;

      errno = 0;

      ASSERT (stat (BASE "link", &st) == -1);

      ASSERT (errno == ENOENT);

    }

  else

    {

      ASSERT (errno == ENOTDIR);

      ASSERT (func (BASE "dir") == 0);

    }

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

  return 0;

}