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/* Get file status. Linux version.
Copyright (C) 2020-2022 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/>. */
#define __fstatat __redirect___fstatat
#define fstatat __redirect_fstatat
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <kernel_stat.h>
#include <sysdep.h>
#include <time.h>
#include <kstat_cp.h>
#include <stat_t64_cp.h>
#include <sys/sysmacros.h>
#if __TIMESIZE == 64 \
&& (__WORDSIZE == 32 \
&& (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32))
/* Sanity check to avoid newer 32-bit ABI to support non-LFS calls. */
_Static_assert (sizeof (__off_t) == sizeof (__off64_t),
"__blkcnt_t and __blkcnt64_t must match");
_Static_assert (sizeof (__ino_t) == sizeof (__ino64_t),
"__blkcnt_t and __blkcnt64_t must match");
_Static_assert (sizeof (__blkcnt_t) == sizeof (__blkcnt64_t),
"__blkcnt_t and __blkcnt64_t must match");
#endif
#if (__WORDSIZE == 32 \
&& (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32)) \
|| defined STAT_HAS_TIME32
# define FSTATAT_USE_STATX 1
static inline int
fstatat64_time64_statx (int fd, const char *file, struct __stat64_t64 *buf,
int flag)
{
/* 32-bit kABI with default 64-bit time_t, e.g. arc, riscv32. Also
64-bit time_t support is done through statx syscall. */
struct statx tmp;
int r = INTERNAL_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
STATX_BASIC_STATS, &tmp);
if (r != 0)
return r;
*buf = (struct __stat64_t64) {
.st_dev = __gnu_dev_makedev (tmp.stx_dev_major, tmp.stx_dev_minor),
.st_rdev = __gnu_dev_makedev (tmp.stx_rdev_major, tmp.stx_rdev_minor),
.st_ino = tmp.stx_ino,
.st_mode = tmp.stx_mode,
.st_nlink = tmp.stx_nlink,
.st_uid = tmp.stx_uid,
.st_gid = tmp.stx_gid,
.st_atime = tmp.stx_atime.tv_sec,
.st_atim.tv_nsec = tmp.stx_atime.tv_nsec,
.st_mtime = tmp.stx_mtime.tv_sec,
.st_mtim.tv_nsec = tmp.stx_mtime.tv_nsec,
.st_ctime = tmp.stx_ctime.tv_sec,
.st_ctim.tv_nsec = tmp.stx_ctime.tv_nsec,
.st_size = tmp.stx_size,
.st_blocks = tmp.stx_blocks,
.st_blksize = tmp.stx_blksize,
};
return r;
}
#else
# define FSTATAT_USE_STATX 0
#endif
/* Only statx supports 64-bit timestamps for 32-bit architectures with
__ASSUME_STATX, so there is no point in building the fallback. */
#if !FSTATAT_USE_STATX || (FSTATAT_USE_STATX && !defined __ASSUME_STATX)
static inline int
fstatat64_time64_stat (int fd, const char *file, struct __stat64_t64 *buf,
int flag)
{
int r;
#if XSTAT_IS_XSTAT64
# ifdef __NR_newfstatat
/* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
x86_64. */
r = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, buf, flag);
# elif defined __NR_fstatat64
# if STAT64_IS_KERNEL_STAT64
/* 64-bit kABI outlier, e.g. alpha */
r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
# else
/* 64-bit kABI outlier, e.g. sparc64. */
struct kernel_stat64 kst64;
r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &kst64, flag);
if (r == 0)
__cp_stat64_kstat64 (buf, &kst64);
# endif
# endif
#else
# ifdef __NR_fstatat64
/* All kABIs with non-LFS support and with old 32-bit time_t support
e.g. arm, csky, i386, hppa, m68k, microblaze, nios2, sh, powerpc32,
and sparc32. */
struct stat64 st64;
r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
if (r == 0)
{
/* Clear both pad and reserved fields. */
memset (buf, 0, sizeof (*buf));
buf->st_dev = st64.st_dev,
buf->st_ino = st64.st_ino;
buf->st_mode = st64.st_mode;
buf->st_nlink = st64.st_nlink;
buf->st_uid = st64.st_uid;
buf->st_gid = st64.st_gid;
buf->st_rdev = st64.st_rdev;
buf->st_size = st64.st_size;
buf->st_blksize = st64.st_blksize;
buf->st_blocks = st64.st_blocks;
buf->st_atim = valid_timespec_to_timespec64 (st64.st_atim);
buf->st_mtim = valid_timespec_to_timespec64 (st64.st_mtim);
buf->st_ctim = valid_timespec_to_timespec64 (st64.st_ctim);
}
# else
/* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
struct kernel_stat kst;
r = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
if (r == 0)
__cp_kstat_stat64_t64 (&kst, buf);
# endif
#endif
return r;
}
#endif
int
__fstatat64_time64 (int fd, const char *file, struct __stat64_t64 *buf,
int flag)
{
int r;
#if FSTATAT_USE_STATX
r = fstatat64_time64_statx (fd, file, buf, flag);
# ifndef __ASSUME_STATX
if (r == -ENOSYS)
r = fstatat64_time64_stat (fd, file, buf, flag);
# endif
#else
r = fstatat64_time64_stat (fd, file, buf, flag);
#endif
return INTERNAL_SYSCALL_ERROR_P (r)
? INLINE_SYSCALL_ERROR_RETURN_VALUE (-r)
: 0;
}
#if __TIMESIZE != 64
hidden_def (__fstatat64_time64)
int
__fstatat64 (int fd, const char *file, struct stat64 *buf, int flags)
{
struct __stat64_t64 st_t64;
return __fstatat64_time64 (fd, file, &st_t64, flags)
?: __cp_stat64_t64_stat64 (&st_t64, buf);
}
#endif
#undef __fstatat
#undef fstatat
hidden_def (__fstatat64)
weak_alias (__fstatat64, fstatat64)
#if XSTAT_IS_XSTAT64
strong_alias (__fstatat64, __fstatat)
weak_alias (__fstatat64, fstatat)
strong_alias (__fstatat64, __GI___fstatat);
#endif
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