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y2038: Use a common definition for stat

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Instead of replicate the same definitions from struct_stat_time64.h
on the multiple struct_stat.h, use a common header which is included
when required (struct_stat_time64_helper.h).  The 64-bit time support
is added only for LFS support.

The __USE_TIME_BITS64 is not defined internally yet, although the
internal header is used when building the 64-bit stat implementations.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Lukasz Majewski
2020-10-15 09:30:59 +02:00
committed by Adhemerval Zanella
parent 746ef78afe
commit 4e8521333b
10 changed files with 452 additions and 375 deletions
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66
sysdeps/unix/sysv/linux/bits/struct_stat_time64_helper.h Normal file
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/* Definition for helper to define struct stat with 64-bit time.
Copyright (C) 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/>. */
/* Content of internal __stat64_t64 struct. */
__dev_t st_dev; /* Device. */
__ino64_t st_ino; /* file serial number. */
__mode_t st_mode; /* File mode. */
__nlink_t st_nlink; /* Link count. */
__uid_t st_uid; /* User ID of the file's owner. */
__gid_t st_gid; /* Group ID of the file's group. */
__dev_t st_rdev; /* Device number, if device. */
__off64_t st_size; /* Size of file, in bytes. */
__blksize_t st_blksize; /* Optimal block size for I/O. */
__blkcnt64_t st_blocks; /* Number 512-byte blocks allocated. */
#ifdef __USE_XOPEN2K8
# ifndef __struct_timespec
# define __struct_timespec struct timespec
# endif
/* Nanosecond resolution timestamps are stored in a format
equivalent to 'struct timespec'. This is the type used
whenever possible but the Unix namespace rules do not allow the
identifier 'timespec' to appear in the <sys/stat.h> header.
Therefore we have to handle the use of this header in strictly
standard-compliant sources special. */
__struct_timespec st_atim;
__struct_timespec st_mtim;
__struct_timespec st_ctim;
# define st_atime st_atim.tv_sec
# define st_mtime st_mtim.tv_sec
# define st_ctime st_ctim.tv_sec
# undef __struct_timespec
#else
/* The definition should be equal to the 'struct __timespec64' internal
layout. */
# if __BYTE_ORDER == __BIG_ENDIAN
# define __fieldts64(name) \
__time64_t name; __int32_t :32; __int32_t name ## nsec
# else
# define __fieldts64(name) \
__time64_t name; __int32_t name ## nsec; __int32_t :32
# endif
__fieldts64 (st_atime);
__fieldts64 (st_mtime);
__fieldts64 (st_ctime);
unsigned long int __glibc_reserved4;
unsigned long int __glibc_reserved5;
# undef __fieldts64
#endif