/* Remove directory entries.

   Copyright (C) 1998-2017 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/>.  */

#ifndef REMOVE_H
# define REMOVE_H

# include "dev-ino.h"

enum rm_interactive
{
  /* Start with any number larger than 1, so that any legacy tests
     against values of 0 or 1 will fail.  */
  RMI_ALWAYS = 3,
  RMI_SOMETIMES,
  RMI_NEVER
};

struct rm_options
{
  /* If true, ignore nonexistent files.  */
  bool ignore_missing_files;

  /* If true, query the user about whether to remove each file.  */
  enum rm_interactive interactive;

  // FIXME: remove
  /* If true, do not traverse into (or remove) any directory that is
     on a file system (i.e., that has a different device number) other
     than that of the corresponding command line argument.  Note that
     even without this option, rm will fail in the end, due to its
     probable inability to remove the mount point.  But there, the
     diagnostic comes too late -- after removing all contents.  */
  bool one_file_system;

  /* If true, recursively remove directories.  */
  bool recursive;

  /* If true, remove empty directories.  */
  bool remove_empty_directories;

  /* Pointer to the device and inode numbers of '/', when --recursive
     and preserving '/'.  Otherwise NULL.  */
  struct dev_ino *root_dev_ino;

  /* If nonzero, stdin is a tty.  */
  bool stdin_tty;

  /* If true, display the name of each file removed.  */
  bool verbose;

  /* If true, treat the failure by the rm function to restore the
     current working directory as a fatal error.  I.e., if this field
     is true and the rm function cannot restore cwd, it must exit with
     a nonzero status.  Some applications require that the rm function
     restore cwd (e.g., mv) and some others do not (e.g., rm,
     in many cases).  */
  bool require_restore_cwd;
};

enum RM_status
{
  /* These must be listed in order of increasing seriousness. */
  RM_OK = 2,
  RM_USER_DECLINED,
  RM_ERROR,
  RM_NONEMPTY_DIR
};

# define VALID_STATUS(S) \
  ((S) == RM_OK || (S) == RM_USER_DECLINED || (S) == RM_ERROR)

# define UPDATE_STATUS(S, New_value)				\
  do								\
    {								\
      if ((New_value) == RM_ERROR				\
          || ((New_value) == RM_USER_DECLINED && (S) == RM_OK))	\
        (S) = (New_value);					\
    }								\
  while (0)

extern enum RM_status rm (char *const *file, struct rm_options const *x);

#endif
