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aa03f722f3
A new struct __stat{64}_t64 type is added with the required
__timespec64 time definition. Only LFS is added, 64-bit time with
32-bit offsets is not supposed to be supported (no existing glibc
configuration supports such a combination). It is done with an extra
__NR_statx call plus a conversion to the new __stat{64}_t64 type.
The statx call is done only for 32-bit time_t ABIs.
Internally some extra routines to copy from/to struct stat{64}
to struct __stat{64} used on multiple implementations (stat, fstat,
lstat, and fstatat) are added on a extra implementation
(stat_t64_cp.c). Alse some extra routines to copy from statx to
__stat{64} is added on statx_cp.c.
Checked with a build for all affected ABIs. I also checked on x86_64,
i686, powerpc, powerpc64le, sparcv9, sparc64, s390, and s390x.
Reviewed-by: Lukasz Majewski <lukma@denx.de>
129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
/* Get file status. Linux version.
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Copyright (C) 2020 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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#define __fstatat __redirect___fstatat
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#define fstatat __redirect_fstatat
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <string.h>
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#include <kernel_stat.h>
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#include <sysdep.h>
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#include <time.h>
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#include <statx_cp.h>
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#include <kstat_cp.h>
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#include <stat_t64_cp.h>
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int
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__fstatat64_time64 (int fd, const char *file, struct __stat64_t64 *buf,
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int flag)
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{
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int r;
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#if (__WORDSIZE == 32 \
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&& (!defined __SYSCALL_WORDSIZE || __SYSCALL_WORDSIZE == 32))
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/* 32-bit kABI with default 64-bit time_t, e.g. arc, riscv32. Also
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64-bit time_t support is done through statx syscall. */
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struct statx tmp;
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r = INLINE_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
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STATX_BASIC_STATS, &tmp);
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if (r == 0 || errno != ENOSYS)
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{
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if (r == 0)
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__cp_stat64_t64_statx (buf, &tmp);
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return r;
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}
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#endif
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#if XSTAT_IS_XSTAT64
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# ifdef __NR_newfstatat
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/* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
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x86_64. */
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r = INLINE_SYSCALL_CALL (newfstatat, fd, file, buf, flag);
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# elif defined __NR_fstatat64
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# if STAT64_IS_KERNEL_STAT64
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/* 64-bit kABI outlier, e.g. alpha */
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r = INLINE_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
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# else
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/* 64-bit kABI outlier, e.g. sparc64. */
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struct kernel_stat64 kst64;
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r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &kst64, flag);
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if (r == 0)
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r = __cp_stat64_kstat64 (buf, &kst64);
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# endif
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# endif
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#else
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# ifdef __NR_fstatat64
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/* All kABIs with non-LFS support and with old 32-bit time_t support
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e.g. arm, csky, i386, hppa, m68k, microblaze, nios2, sh, powerpc32,
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and sparc32. */
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struct stat64 st64;
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r = INLINE_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
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if (r == 0)
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{
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/* Clear both pad and reserved fields. */
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memset (buf, 0, sizeof (*buf));
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buf->st_dev = st64.st_dev,
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buf->st_ino = st64.st_ino;
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buf->st_mode = st64.st_mode;
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buf->st_nlink = st64.st_nlink;
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buf->st_uid = st64.st_uid;
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buf->st_gid = st64.st_gid;
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buf->st_rdev = st64.st_rdev;
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buf->st_size = st64.st_size;
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buf->st_blksize = st64.st_blksize;
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buf->st_blocks = st64.st_blocks;
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buf->st_atim = valid_timespec_to_timespec64 (st64.st_atim);
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buf->st_mtim = valid_timespec_to_timespec64 (st64.st_mtim);
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buf->st_ctim = valid_timespec_to_timespec64 (st64.st_ctim);
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}
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# else
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/* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
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struct kernel_stat kst;
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r = INLINE_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
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if (r == 0)
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r = __cp_kstat_stat64_t64 (&kst, buf);
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# endif
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#endif
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return r;
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}
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#if __TIMESIZE != 64
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hidden_def (__fstatat64_time64)
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int
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__fstatat64 (int fd, const char *file, struct stat64 *buf, int flags)
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{
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struct __stat64_t64 st_t64;
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return __fstatat64_time64 (fd, file, &st_t64, flags)
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?: __cp_stat64_t64_stat64 (&st_t64, buf);
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}
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#endif
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#undef __fstatat
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#undef fstatat
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hidden_def (__fstatat64)
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weak_alias (__fstatat64, fstatat64)
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#if XSTAT_IS_XSTAT64
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strong_alias (__fstatat64, __fstatat)
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weak_alias (__fstatat64, fstatat)
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strong_alias (__fstatat64, __GI___fstatat);
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#endif
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