1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
| | #define _BSD_SOURCE
#include <sys/stat.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <stdint.h>
#include <sys/sysmacros.h>
#include "syscall.h"
#include "kstat.h"
struct statx {
uint32_t stx_mask;
uint32_t stx_blksize;
uint64_t stx_attributes;
uint32_t stx_nlink;
uint32_t stx_uid;
uint32_t stx_gid;
uint16_t stx_mode;
uint16_t pad1;
uint64_t stx_ino;
uint64_t stx_size;
uint64_t stx_blocks;
uint64_t stx_attributes_mask;
struct {
int64_t tv_sec;
uint32_t tv_nsec;
int32_t pad;
} stx_atime, stx_btime, stx_ctime, stx_mtime;
uint32_t stx_rdev_major;
uint32_t stx_rdev_minor;
uint32_t stx_dev_major;
uint32_t stx_dev_minor;
uint64_t spare[14];
};
static int fstatat_statx(int fd, const char *restrict path, struct stat *restrict st, int flag)
{
struct statx stx;
int ret = __syscall(SYS_statx, fd, path, flag, 0x7ff, &stx);
if (ret) return ret;
*st = (struct stat){
.st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor),
.st_ino = stx.stx_ino,
.st_mode = stx.stx_mode,
.st_nlink = stx.stx_nlink,
.st_uid = stx.stx_uid,
.st_gid = stx.stx_gid,
.st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor),
.st_size = stx.stx_size,
.st_blksize = stx.stx_blksize,
.st_blocks = stx.stx_blocks,
.st_atim.tv_sec = stx.stx_atime.tv_sec,
.st_atim.tv_nsec = stx.stx_atime.tv_nsec,
.st_mtim.tv_sec = stx.stx_mtime.tv_sec,
.st_mtim.tv_nsec = stx.stx_mtime.tv_nsec,
.st_ctim.tv_sec = stx.stx_ctime.tv_sec,
.st_ctim.tv_nsec = stx.stx_ctime.tv_nsec,
#if _REDIR_TIME64
.__st_atim32.tv_sec = stx.stx_atime.tv_sec,
.__st_atim32.tv_nsec = stx.stx_atime.tv_nsec,
.__st_mtim32.tv_sec = stx.stx_mtime.tv_sec,
.__st_mtim32.tv_nsec = stx.stx_mtime.tv_nsec,
.__st_ctim32.tv_sec = stx.stx_ctime.tv_sec,
.__st_ctim32.tv_nsec = stx.stx_ctime.tv_nsec,
#endif
};
return 0;
}
static int fstatat_kstat(int fd, const char *restrict path, struct stat *restrict st, int flag)
{
int ret;
struct kstat kst;
if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {
ret = __syscall(SYS_fstat, fd, &kst);
if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
if (ret==-EINVAL) {
char buf[15+3*sizeof(int)];
__procfdname(buf, fd);
#ifdef SYS_stat
ret = __syscall(SYS_stat, buf, &kst);
#else
ret = __syscall(SYS_fstatat, AT_FDCWD, buf, &kst, 0);
#endif
}
}
}
#ifdef SYS_lstat
else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
ret = __syscall(SYS_lstat, path, &kst);
#endif
#ifdef SYS_stat
else if ((fd == AT_FDCWD || *path=='/') && !flag)
ret = __syscall(SYS_stat, path, &kst);
#endif
else ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
if (ret) return ret;
*st = (struct stat){
.st_dev = kst.st_dev,
.st_ino = kst.st_ino,
.st_mode = kst.st_mode,
.st_nlink = kst.st_nlink,
.st_uid = kst.st_uid,
.st_gid = kst.st_gid,
.st_rdev = kst.st_rdev,
.st_size = kst.st_size,
.st_blksize = kst.st_blksize,
.st_blocks = kst.st_blocks,
.st_atim.tv_sec = kst.st_atime_sec,
.st_atim.tv_nsec = kst.st_atime_nsec,
.st_mtim.tv_sec = kst.st_mtime_sec,
.st_mtim.tv_nsec = kst.st_mtime_nsec,
.st_ctim.tv_sec = kst.st_ctime_sec,
.st_ctim.tv_nsec = kst.st_ctime_nsec,
#if _REDIR_TIME64
.__st_atim32.tv_sec = kst.st_atime_sec,
.__st_atim32.tv_nsec = kst.st_atime_nsec,
.__st_mtim32.tv_sec = kst.st_mtime_sec,
.__st_mtim32.tv_nsec = kst.st_mtime_nsec,
.__st_ctim32.tv_sec = kst.st_ctime_sec,
.__st_ctim32.tv_nsec = kst.st_ctime_nsec,
#endif
};
return 0;
}
int fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
{
static int use_statx = 1;
int ret;
if (use_statx) {
if (sizeof((struct kstat){0}.st_atime_sec) < sizeof(time_t)) {
ret = fstatat_statx(fd, path, st, flag);
if (ret!=-ENOSYS) return __syscall_ret(ret);
else use_statx = 0;
}
}
ret = fstatat_kstat(fd, path, st, flag);
return __syscall_ret(ret);
}
#if !_REDIR_TIME64
weak_alias(fstatat, fstatat64);
#endif
|