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/* 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 */