/* 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/>.  */

/*

 *	X/Open Portability Guide 4.2: ftw.h

 */

#ifndef _FTW_H

#define	_FTW_H	1

#include <features.h>

#include <sys/types.h>

#include <sys/stat.h>

__BEGIN_DECLS

/* Values for the FLAG argument to the user function passed to `ftw'

   and 'nftw'.  */

enum

{

  FTW_F,		/* Regular file.  */

#define FTW_F	 FTW_F

  FTW_D,		/* Directory.  */

#define FTW_D	 FTW_D

  FTW_DNR,		/* Unreadable directory.  */

#define FTW_DNR	 FTW_DNR

  FTW_NS,		/* Unstatable file.  */

#define FTW_NS	 FTW_NS

#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED

  FTW_SL,		/* Symbolic link.  */

# define FTW_SL	 FTW_SL

#endif

#ifdef __USE_XOPEN_EXTENDED

/* These flags are only passed from the `nftw' function.  */

  FTW_DP,		/* Directory, all subdirs have been visited. */

# define FTW_DP	 FTW_DP

  FTW_SLN		/* Symbolic link naming non-existing file.  */

# define FTW_SLN FTW_SLN

#endif	/* extended X/Open */

};

#ifdef __USE_XOPEN_EXTENDED

/* Flags for fourth argument of `nftw'.  */

enum

{

  FTW_PHYS = 1,		/* Perform physical walk, ignore symlinks.  */

# define FTW_PHYS	FTW_PHYS

  FTW_MOUNT = 2,	/* Report only files on same file system as the

			   argument.  */

# define FTW_MOUNT	FTW_MOUNT

  FTW_CHDIR = 4,	/* Change to current directory while processing it.  */

# define FTW_CHDIR	FTW_CHDIR

  FTW_DEPTH = 8		/* Report files in directory before directory itself.*/

# define FTW_DEPTH	FTW_DEPTH

# ifdef __USE_GNU

  ,

  FTW_ACTIONRETVAL = 16	/* Assume callback to return FTW_* values instead of

			   zero to continue and non-zero to terminate.  */

#  define FTW_ACTIONRETVAL FTW_ACTIONRETVAL

# endif

};

#ifdef __USE_GNU

/* Return values from callback functions.  */

enum

{

  FTW_CONTINUE = 0,	/* Continue with next sibling or for FTW_D with the

			   first child.  */

# define FTW_CONTINUE	FTW_CONTINUE

  FTW_STOP = 1,		/* Return from `ftw' or `nftw' with FTW_STOP as return

			   value.  */

# define FTW_STOP	FTW_STOP

  FTW_SKIP_SUBTREE = 2,	/* Only meaningful for FTW_D: Don't walk through the

			   subtree, instead just continue with its next

			   sibling. */

# define FTW_SKIP_SUBTREE FTW_SKIP_SUBTREE

  FTW_SKIP_SIBLINGS = 3,/* Continue with FTW_DP callback for current directory

			    (if FTW_DEPTH) and then its siblings.  */

# define FTW_SKIP_SIBLINGS FTW_SKIP_SIBLINGS

};

#endif

/* Structure used for fourth argument to callback function for `nftw'.  */

struct FTW

  {

    int base;

    int level;

  };

#endif	/* extended X/Open */

/* Convenient types for callback functions.  */

typedef int (*__ftw_func_t) (const char *__filename,

			     const struct stat *__status, int __flag);

#ifdef __USE_LARGEFILE64

typedef int (*__ftw64_func_t) (const char *__filename,

			       const struct stat64 *__status, int __flag);

#endif

#ifdef __USE_XOPEN_EXTENDED

typedef int (*__nftw_func_t) (const char *__filename,

			      const struct stat *__status, int __flag,

			      struct FTW *__info);

# ifdef __USE_LARGEFILE64

typedef int (*__nftw64_func_t) (const char *__filename,

				const struct stat64 *__status,

				int __flag, struct FTW *__info);

# endif

#endif

/* Call a function on every element in a directory tree.

   This function is a possible cancellation point and therefore not

   marked with __THROW.  */

#ifndef __USE_FILE_OFFSET64

extern int ftw (const char *__dir, __ftw_func_t __func, int __descriptors)

     __nonnull ((1, 2));

#else

# ifdef __REDIRECT

extern int __REDIRECT (ftw, (const char *__dir, __ftw_func_t __func,

			     int __descriptors), ftw64) __nonnull ((1, 2));

# else

#  define ftw ftw64

# endif

#endif

#ifdef __USE_LARGEFILE64

extern int ftw64 (const char *__dir, __ftw64_func_t __func,

		  int __descriptors) __nonnull ((1, 2));

#endif

#ifdef __USE_XOPEN_EXTENDED

/* Call a function on every element in a directory tree.  FLAG allows

   to specify the behaviour more detailed.

   This function is a possible cancellation point and therefore not

   marked with __THROW.  */

# ifndef __USE_FILE_OFFSET64

extern int nftw (const char *__dir, __nftw_func_t __func, int __descriptors,

		 int __flag) __nonnull ((1, 2));

# else

#  ifdef __REDIRECT

extern int __REDIRECT (nftw, (const char *__dir, __nftw_func_t __func,

			      int __descriptors, int __flag), nftw64)

     __nonnull ((1, 2));

#  else

#   define nftw nftw64

#  endif

# endif

# ifdef __USE_LARGEFILE64

extern int nftw64 (const char *__dir, __nftw64_func_t __func,

		   int __descriptors, int __flag) __nonnull ((1, 2));

# endif

#endif

__END_DECLS

#endif	/* ftw.h */