1/* Get file status. Linux version.
2 Copyright (C) 2020-2021 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#include <sys/stat.h>
20#include <kernel_stat.h>
21#include <sysdep.h>
22
23#if !XSTAT_IS_XSTAT64
24# include <kstat_cp.h>
25
26int
27__fstatat (int fd, const char *file, struct stat *buf, int flag)
28{
29 int r;
30
31# if STAT_IS_KERNEL_STAT
32 /* New kABIs which uses generic pre 64-bit time Linux ABI, e.g.
33 csky, nios2 */
34 r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, buf, flag);
35 if (r == 0 && (buf->__st_ino_pad != 0
36 || buf->__st_size_pad != 0
37 || buf->__st_blocks_pad != 0))
38 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
39# else
40# ifdef __NR_fstatat64
41 /* Old KABIs with old non-LFS support, e.g. arm, i386, hppa, m68k, mips32,
42 microblaze, s390, sh, powerpc, and sparc. */
43 struct stat64 st64;
44 r = INTERNAL_SYSCALL_CALL (fstatat64, fd, file, &st64, flag);
45 if (r == 0)
46 {
47 if (! in_ino_t_range (st64.st_ino)
48 || ! in_off_t_range (st64.st_size)
49 || ! in_blkcnt_t_range (st64.st_blocks))
50 return INLINE_SYSCALL_ERROR_RETURN_VALUE (EOVERFLOW);
51
52 /* Clear internal pad and reserved fields. */
53 memset (buf, 0, sizeof (*buf));
54
55 buf->st_dev = st64.st_dev,
56 buf->st_ino = st64.st_ino;
57 buf->st_mode = st64.st_mode;
58 buf->st_nlink = st64.st_nlink;
59 buf->st_uid = st64.st_uid;
60 buf->st_gid = st64.st_gid;
61 buf->st_rdev = st64.st_rdev;
62 buf->st_size = st64.st_size;
63 buf->st_blksize = st64.st_blksize;
64 buf->st_blocks = st64.st_blocks;
65 buf->st_atim.tv_sec = st64.st_atim.tv_sec;
66 buf->st_atim.tv_nsec = st64.st_atim.tv_nsec;
67 buf->st_mtim.tv_sec = st64.st_mtim.tv_sec;
68 buf->st_mtim.tv_nsec = st64.st_mtim.tv_nsec;
69 buf->st_ctim.tv_sec = st64.st_ctim.tv_sec;
70 buf->st_ctim.tv_nsec = st64.st_ctim.tv_nsec;
71
72 return 0;
73 }
74# else
75 /* 64-bit kabi outlier, e.g. mips64 and mips64-n32. */
76 struct kernel_stat kst;
77 r = INTERNAL_SYSCALL_CALL (newfstatat, fd, file, &kst, flag);
78 if (r == 0)
79 r = __cp_kstat_stat (&kst, buf);
80# endif /* __nr_fstatat64 */
81# endif /* STAT_IS_KERNEL_STAT */
82
83 return INTERNAL_SYSCALL_ERROR_P (r)
84 ? INLINE_SYSCALL_ERROR_RETURN_VALUE (-r)
85 : 0;
86}
87
88weak_alias (__fstatat, fstatat)
89#endif
90