1/* Get file status. Linux version.
2 Copyright (C) 2020-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#define __fstat __redirect___fstat
20#define fstat __redirect_fstat
21#include <sys/stat.h>
22#undef __fstat
23#undef fstat
24#include <fcntl.h>
25#include <internal-stat.h>
26#include <errno.h>
27
28int
29__fstat64_time64 (int fd, struct __stat64_t64 *buf)
30{
31#if !FSTATAT_USE_STATX
32# if XSTAT_IS_XSTAT64
33 /* The __NR_stat macro is defined for all ABIs that also define
34 XSTAT_IS_STAT64, so to correctly identify alpha and sparc check
35 __NR_newfstatat (similar to what fstatat64 does). */
36# ifdef __NR_newfstatat
37 /* 64-bit kABI, e.g. aarch64, ia64, powerpc64*, s390x, riscv64, and
38 x86_64. */
39 return INLINE_SYSCALL_CALL (fstat, fd, buf);
40# elif defined __NR_fstat64
41# if STAT64_IS_KERNEL_STAT64
42 /* 64-bit kABI outlier, e.g. alpha */
43 return INLINE_SYSCALL_CALL (fstat64, fd, buf);
44# else
45 /* 64-bit kABI outlier, e.g. sparc64. */
46 struct kernel_stat64 kst64;
47 int r = INLINE_SYSCALL_CALL (fstat64, fd, &kst64);
48 if (r == 0)
49 __cp_stat64_kstat64 (buf, &kst64);
50 return r;
51# endif /* STAT64_IS_KERNEL_STAT64 */
52# endif
53# else /* XSTAT_IS_XSTAT64 */
54 /* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
55 struct kernel_stat kst;
56 int r = INLINE_SYSCALL_CALL (fstat, fd, &kst);
57 if (r == 0)
58 __cp_kstat_stat64_t64 (&kst, buf);
59 return r;
60# endif
61#else /* !FSTATAT_USE_STATX */
62 /* All kABIs with non-LFS support and with old 32-bit time_t support
63 e.g. arm, csky, i386, hppa, m68k, microblaze, nios2, sh, powerpc32,
64 and sparc32. */
65 if (fd < 0)
66 {
67 __set_errno (EBADF);
68 return -1;
69 }
70 return __fstatat64_time64 (fd, "", buf, AT_EMPTY_PATH);
71#endif
72}
73#if __TIMESIZE != 64
74hidden_def (__fstat64_time64)
75
76int
77__fstat64 (int fd, struct stat64 *buf)
78{
79 if (fd < 0)
80 {
81 __set_errno (EBADF);
82 return -1;
83 }
84
85 struct __stat64_t64 st_t64;
86 return __fstat64_time64 (fd, &st_t64)
87 ?: __cp_stat64_t64_stat64 (&st_t64, buf);
88}
89#endif
90
91#undef __fstat
92#undef fstat
93
94hidden_def (__fstat64)
95weak_alias (__fstat64, fstat64)
96
97#if XSTAT_IS_XSTAT64
98strong_alias (__fstat64, __fstat)
99weak_alias (__fstat64, fstat)
100#endif
101

source code of glibc/sysdeps/unix/sysv/linux/fstat64.c