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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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59
sysdeps/unix/sysv/linux/struct_stat_time64.h
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@ -22,64 +22,13 @@
#if __TIMESIZE == 64
# define __stat64_t64 stat64
#else
# ifdef __USE_LARGEFILE64
# include <endian.h>
/* 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
/* Workaround for the definition from struct_stat.h */
# undef st_atime
# undef st_mtime
# undef st_ctime
# include <struct___timespec64.h>
struct __stat64_t64
{
__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
/* 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 __timespec64 st_atim; /* Time of last access. */
struct __timespec64 st_mtim; /* Time of last modification. */
struct __timespec64 st_ctim; /* Time of last status change. */
# define st_atime st_atim.tv_sec /* Backward compatibility. */
# define st_mtime st_mtim.tv_sec
# define st_ctime st_ctim.tv_sec
# else
__fieldts64 (st_atime);
__fieldts64 (st_mtime);
__fieldts64 (st_ctime);
# endif /* __USE_XOPEN2K8 */
# define __struct_timespec struct __timespec64
# include <bits/struct_stat_time64_helper.h>
};
# define _STATBUF_ST_BLKSIZE
# define _STATBUF_ST_RDEV
# define _STATBUF_ST_NSEC
# undef __fieldts64
# endif /* __USE_LARGEFILE64 */
# endif /* __TIMESIZE == 64 */
#endif /* __TIMESIZE == 64 */
#endif /* _BITS_STRUCT_STAT_TIME64_H */