master
1/* Get file status. Linux version.
2 Copyright (C) 2020-2025 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/* zig patch: fixes to make this file compile */
20
21#define __fstatat __redirect___fstatat
22#define fstatat __redirect_fstatat
23#include <inttypes.h>
24#include <sys/stat.h>
25#include <fcntl.h>
26#include <string.h>
27#include <sysdep.h>
28#include <time.h>
29#include <sys/sysmacros.h>
30#include <internal-stat.h>
31
32#if FSTATAT_USE_STATX
33
34static inline int
35fstatat64_time64_statx (int fd, const char *file, struct __stat64_t64 *buf,
36 int flag)
37{
38 /* 32-bit kABI with default 64-bit time_t, e.g. arc, riscv32. Also
39 64-bit time_t support is done through statx syscall. */
40 struct statx tmp;
41 int r = INTERNAL_SYSCALL_CALL (statx, fd, file, AT_NO_AUTOMOUNT | flag,
42 STATX_BASIC_STATS, &tmp);
43 if (r != 0)
44 return r;
45
46 *buf = (struct __stat64_t64) {
47 .st_dev = gnu_dev_makedev (tmp.stx_dev_major, tmp.stx_dev_minor),
48 .st_rdev = gnu_dev_makedev (tmp.stx_rdev_major, tmp.stx_rdev_minor),
49 .st_ino = tmp.stx_ino,
50 .st_mode = tmp.stx_mode,
51 .st_nlink = tmp.stx_nlink,
52 .st_uid = tmp.stx_uid,
53 .st_gid = tmp.stx_gid,
54 .st_atime = tmp.stx_atime.tv_sec,
55 .st_atim.tv_nsec = tmp.stx_atime.tv_nsec,
56 .st_mtime = tmp.stx_mtime.tv_sec,
57 .st_mtim.tv_nsec = tmp.stx_mtime.tv_nsec,
58 .st_ctime = tmp.stx_ctime.tv_sec,
59 .st_ctim.tv_nsec = tmp.stx_ctime.tv_nsec,
60 .st_size = tmp.stx_size,
61 .st_blocks = tmp.stx_blocks,
62 .st_blksize = tmp.stx_blksize,
63 };
64
65 return r;
66}
67#endif
68
69/* Only statx supports 64-bit timestamps for 32-bit architectures with
70 __ASSUME_STATX, so there is no point in building the fallback. */
71#if !FSTATAT_USE_STATX || (FSTATAT_USE_STATX && !defined __ASSUME_STATX)
72static inline struct __timespec64
73valid_timespec_to_timespec64 (const struct timespec ts)
74{
75 struct __timespec64 ts64;
76
77 ts64.tv_sec = ts.tv_sec;
78 ts64.tv_nsec = ts.tv_nsec;
79
80 return ts64;
81}
82
83static inline int
84fstatat64_time64_stat (int fd, const char *file, struct __stat64_t64 *buf,
85 int flag)
86{
87 int r;
88
89#if XSTAT_IS_XSTAT64
90# ifdef __NR_newfstatat
91 /* 64-bit kABI, e.g. aarch64, powerpc64*, s390x, riscv64, and
92 x86_64. */
93 r = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, buf, flag);
94# elif defined __NR_fstatat64
95# if STAT64_IS_KERNEL_STAT64
96 /* 64-bit kABI outlier, e.g. alpha */
97 r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
98# else
99 /* 64-bit kABI outlier, e.g. sparc64. */
100 struct kernel_stat64 kst64;
101 r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &kst64, flag);
102 if (r == 0)
103 __cp_stat64_kstat64 (buf, &kst64);
104# endif
105# endif
106#else
107# ifdef __NR_fstatat64
108 /* All kABIs with non-LFS support and with old 32-bit time_t support
109 e.g. arm, csky, i386, hppa, m68k, microblaze, sh, powerpc32,
110 and sparc32. */
111 struct stat64 st64;
112 r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
113 if (r == 0)
114 {
115 /* Clear both pad and reserved fields. */
116 memset (buf, 0, sizeof (*buf));
117
118 buf->st_dev = st64.st_dev,
119 buf->st_ino = st64.st_ino;
120 buf->st_mode = st64.st_mode;
121 buf->st_nlink = st64.st_nlink;
122 buf->st_uid = st64.st_uid;
123 buf->st_gid = st64.st_gid;
124 buf->st_rdev = st64.st_rdev;
125 buf->st_size = st64.st_size;
126 buf->st_blksize = st64.st_blksize;
127 buf->st_blocks = st64.st_blocks;
128 buf->st_atim = valid_timespec_to_timespec64 (st64.st_atim);
129 buf->st_mtim = valid_timespec_to_timespec64 (st64.st_mtim);
130 buf->st_ctim = valid_timespec_to_timespec64 (st64.st_ctim);
131 }
132# else
133 /* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
134 struct kernel_stat kst;
135 r = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
136 if (r == 0)
137 __cp_kstat_stat64_t64 (&kst, buf);
138# endif
139#endif
140
141 return r;
142}
143#endif
144
145int
146__fstatat64_time64 (int fd, const char *file, struct __stat64_t64 *buf,
147 int flag)
148{
149 int r;
150
151#if FSTATAT_USE_STATX
152 r = fstatat64_time64_statx (fd, file, buf, flag);
153# ifndef __ASSUME_STATX
154 if (r == -ENOSYS)
155 r = fstatat64_time64_stat (fd, file, buf, flag);
156# endif
157#else
158 r = fstatat64_time64_stat (fd, file, buf, flag);
159#endif
160
161 return INTERNAL_SYSCALL_ERROR_P (r)
162 ? INLINE_SYSCALL_ERROR_RETURN_VALUE (-r)
163 : 0;
164}
165#if __TIMESIZE != 64
166hidden_def (__fstatat64_time64)
167
168int
169__fstatat64 (int fd, const char *file, struct stat64 *buf, int flags)
170{
171 struct __stat64_t64 st_t64;
172 return __fstatat64_time64 (fd, file, &st_t64, flags)
173 ?: __cp_stat64_t64_stat64 (&st_t64, buf);
174}
175#endif
176
177#undef __fstatat
178#undef fstatat
179
180hidden_def (__fstatat64)
181weak_alias (__fstatat64, fstatat64)
182
183#if XSTAT_IS_XSTAT64
184strong_alias (__fstatat64, __fstatat)
185weak_alias (__fstatat64, fstatat)
186strong_alias (__fstatat64, __GI___fstatat);
187#endif