glibc/io/utime.h
Adhemerval Zanella dd535f4f19 Always define __USE_TIME_BITS64 when 64 bit time_t is used
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)
2024-05-28 07:30:07 +02:00

67 lines
1.9 KiB
C

/* Copyright (C) 1991-2024 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/>. */
/*
* POSIX Standard: 5.6.6 Set File Access and Modification Times <utime.h>
*/
#ifndef _UTIME_H
#define _UTIME_H 1
#include <features.h>
__BEGIN_DECLS
#include <bits/types.h>
#if defined __USE_XOPEN || defined __USE_XOPEN2K
# include <bits/types/time_t.h>
#endif
/* Structure describing file times. */
struct utimbuf
{
#ifdef __USE_TIME64_REDIRECTS
__time64_t actime; /* Access time. */
__time64_t modtime; /* Modification time. */
#else
__time_t actime; /* Access time. */
__time_t modtime; /* Modification time. */
#endif
};
/* Set the access and modification times of FILE to those given in
*FILE_TIMES. If FILE_TIMES is NULL, set them to the current time. */
#ifndef __USE_TIME64_REDIRECTS
extern int utime (const char *__file,
const struct utimbuf *__file_times)
__THROW __nonnull ((1));
#else
# ifdef __REDIRECT_NTH
extern int __REDIRECT_NTH (utime, (const char *__file,
const struct utimbuf *__file_times),
__utime64);
# else
# define utime __utime64
# endif
#endif
__END_DECLS
#endif /* utime.h */