mirror of
git://sourceware.org/git/glibc.git
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dd535f4f19
It was raised on libc-help [1] that some Linux kernel interfaces expect
the libc to define __USE_TIME_BITS64 to indicate the time_t size for the
kABI. Different than defined by the initial y2038 design document [2],
the __USE_TIME_BITS64 is only defined for ABIs that support more than
one time_t size (by defining the _TIME_BITS for each module).
The 64 bit time_t redirects are now enabled using a different internal
define (__USE_TIME64_REDIRECTS). There is no expected change in semantic
or code generation.
Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and
arm-linux-gnueabi
[1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html
[2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign
Reviewed-by: DJ Delorie <dj@redhat.com>
(cherry picked from commit a4ed0471d7)
220 lines
6.2 KiB
C
220 lines
6.2 KiB
C
/* Copyright (C) 1992-2024 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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<https://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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# ifndef __USE_TIME64_REDIRECTS
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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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extern int __REDIRECT (ftw, (const char *__dir, __ftw_func_t __func,
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int __descriptors), __ftw64_time64)
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__nonnull ((1, 2));
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# endif
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# else
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# ifndef __USE_TIME64_REDIRECTS
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# define ftw ftw64
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# else
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# define ftw __ftw64_time64
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# endif
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# endif
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#endif
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#ifdef __USE_LARGEFILE64
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# ifndef __USE_TIME64_REDIRECTS
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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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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (ftw64, (const char *__dir, __ftw64_func_t __func,
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int __descriptors),
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__ftw64_time64)
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__nonnull ((1, 2));
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# else
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# define nftw64 __nftw64_time64
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# endif
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# endif
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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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# ifndef __USE_TIME64_REDIRECTS
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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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extern int __REDIRECT (nftw, (const char *__dir, __nftw_func_t __func,
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int __descriptors, int __flag), __nftw64_time64)
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__nonnull ((1, 2));
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# endif
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# else
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# ifndef __USE_TIME64_REDIRECTS
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# define nftw nftw64
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# else
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# define nftw __nftw64_time64
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# endif
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# endif
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# endif
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# ifdef __USE_LARGEFILE64
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# ifndef __USE_TIME64_REDIRECTS
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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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# else
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# ifdef __REDIRECT
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extern int __REDIRECT (nftw64, (const char *__dir, __nftw64_func_t __func,
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int __descriptors, int __flag),
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__nftw64_time64)
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__nonnull ((1, 2));
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# else
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# define nftw64 __nftw64_time64
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# endif
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# endif
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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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