/* Copyright (C) 1992-2018 Free Software Foundation, Inc.

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This file is part of the GNU C Library.

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The GNU C Library is free software; you can redistribute it and/or

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modify it under the terms of the GNU Lesser General Public

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License as published by the Free Software Foundation; either

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version 2.1 of the License, or (at your option) any later version.

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The GNU C Library is distributed in the hope that it will be useful,

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but WITHOUT ANY WARRANTY; without even the implied warranty of

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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Lesser General Public License for more details.

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

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License along with the GNU C Library; if not, see

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<http://www.gnu.org/licenses/>. */

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/*

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* X/Open Portability Guide 4.2: ftw.h

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*/

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#ifndef _FTW_H

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#define _FTW_H 1

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#include <features.h>

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#include <sys/types.h>

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#include <sys/stat.h>

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__BEGIN_DECLS

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

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and 'nftw'. */

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enum

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{

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FTW_F, /* Regular file. */

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#define FTW_F FTW_F

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FTW_D, /* Directory. */

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#define FTW_D FTW_D

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FTW_DNR, /* Unreadable directory. */

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#define FTW_DNR FTW_DNR

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FTW_NS, /* Unstatable file. */

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#define FTW_NS FTW_NS

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#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED

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FTW_SL, /* Symbolic link. */

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# define FTW_SL FTW_SL

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#endif

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#ifdef __USE_XOPEN_EXTENDED

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

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

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# define FTW_DP FTW_DP

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

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# define FTW_SLN FTW_SLN

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#endif /* extended X/Open */

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};

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#ifdef __USE_XOPEN_EXTENDED

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

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enum

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{

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

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# define FTW_PHYS FTW_PHYS

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

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argument. */

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# define FTW_MOUNT FTW_MOUNT

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

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# define FTW_CHDIR FTW_CHDIR

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

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# define FTW_DEPTH FTW_DEPTH

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# ifdef __USE_GNU

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,

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

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

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# define FTW_ACTIONRETVAL FTW_ACTIONRETVAL

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# endif

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};

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#ifdef __USE_GNU

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/* Return values from callback functions. */

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enum

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{

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

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first child. */

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# define FTW_CONTINUE FTW_CONTINUE

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

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value. */

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# define FTW_STOP FTW_STOP

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

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subtree, instead just continue with its next

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sibling. */

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# define FTW_SKIP_SUBTREE FTW_SKIP_SUBTREE

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

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(if FTW_DEPTH) and then its siblings. */

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# define FTW_SKIP_SIBLINGS FTW_SKIP_SIBLINGS

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};

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#endif

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

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struct FTW

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{

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int base;

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int level;

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};

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#endif /* extended X/Open */

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/* Convenient types for callback functions. */

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

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const struct stat *__status, int __flag);

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#ifdef __USE_LARGEFILE64

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

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const struct stat64 *__status, int __flag);

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#endif

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#ifdef __USE_XOPEN_EXTENDED

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

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const struct stat *__status, int __flag,

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struct FTW *__info);

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# ifdef __USE_LARGEFILE64

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

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const struct stat64 *__status,

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int __flag, struct FTW *__info);

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# endif

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#endif

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

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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#ifndef __USE_FILE_OFFSET64

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

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__nonnull ((1, 2));

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#else

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# ifdef __REDIRECT

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

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

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# else

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# define ftw ftw64

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# endif

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#endif

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#ifdef __USE_LARGEFILE64

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

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

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#endif

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#ifdef __USE_XOPEN_EXTENDED

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

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to specify the behaviour more detailed.

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This function is a possible cancellation point and therefore not

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marked with __THROW. */

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# ifndef __USE_FILE_OFFSET64

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

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

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# else

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# ifdef __REDIRECT

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

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int __descriptors, int __flag), nftw64)

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__nonnull ((1, 2));

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# else

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# define nftw nftw64

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# endif

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# endif

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# ifdef __USE_LARGEFILE64

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

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

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# endif

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#endif

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__END_DECLS

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#endif /* ftw.h */

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