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/* Copyright (C) 1992-2021 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
<https://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 */
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