1#define _BSD_SOURCE
2#include <sys/stat.h>
3#include <string.h>
4#include <fcntl.h>
5#include <errno.h>
6#include <stdint.h>
7#include <sys/sysmacros.h>
8#include "syscall.h"
9
10struct statx {
11 uint32_t stx_mask;
12 uint32_t stx_blksize;
13 uint64_t stx_attributes;
14 uint32_t stx_nlink;
15 uint32_t stx_uid;
16 uint32_t stx_gid;
17 uint16_t stx_mode;
18 uint16_t pad1;
19 uint64_t stx_ino;
20 uint64_t stx_size;
21 uint64_t stx_blocks;
22 uint64_t stx_attributes_mask;
23 struct {
24 int64_t tv_sec;
25 uint32_t tv_nsec;
26 int32_t pad;
27 } stx_atime, stx_btime, stx_ctime, stx_mtime;
28 uint32_t stx_rdev_major;
29 uint32_t stx_rdev_minor;
30 uint32_t stx_dev_major;
31 uint32_t stx_dev_minor;
32 uint64_t spare[14];
33};
34
35static int fstatat_statx(int fd, const char *restrict path, struct stat *restrict st, int flag)
36{
37 struct statx stx;
38
39 flag |= AT_NO_AUTOMOUNT;
40 int ret = __syscall(SYS_statx, fd, path, flag, 0x7ff, &stx);
41 if (ret) return ret;
42
43 *st = (struct stat){
44 .st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor),
45 .st_ino = stx.stx_ino,
46 .st_mode = stx.stx_mode,
47 .st_nlink = stx.stx_nlink,
48 .st_uid = stx.stx_uid,
49 .st_gid = stx.stx_gid,
50 .st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor),
51 .st_size = stx.stx_size,
52 .st_blksize = stx.stx_blksize,
53 .st_blocks = stx.stx_blocks,
54 .st_atim.tv_sec = stx.stx_atime.tv_sec,
55 .st_atim.tv_nsec = stx.stx_atime.tv_nsec,
56 .st_mtim.tv_sec = stx.stx_mtime.tv_sec,
57 .st_mtim.tv_nsec = stx.stx_mtime.tv_nsec,
58 .st_ctim.tv_sec = stx.stx_ctime.tv_sec,
59 .st_ctim.tv_nsec = stx.stx_ctime.tv_nsec,
60#if _REDIR_TIME64
61 .__st_atim32.tv_sec = stx.stx_atime.tv_sec,
62 .__st_atim32.tv_nsec = stx.stx_atime.tv_nsec,
63 .__st_mtim32.tv_sec = stx.stx_mtime.tv_sec,
64 .__st_mtim32.tv_nsec = stx.stx_mtime.tv_nsec,
65 .__st_ctim32.tv_sec = stx.stx_ctime.tv_sec,
66 .__st_ctim32.tv_nsec = stx.stx_ctime.tv_nsec,
67#endif
68 };
69 return 0;
70}
71
72#ifdef SYS_fstatat
73
74#include "kstat.h"
75
76static int fstatat_kstat(int fd, const char *restrict path, struct stat *restrict st, int flag)
77{
78 int ret;
79 struct kstat kst;
80
81 if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {
82 ret = __syscall(SYS_fstat, fd, &kst);
83 if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
84 ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
85 if (ret==-EINVAL) {
86 char buf[15+3*sizeof(int)];
87 __procfdname(buf, fd);
88#ifdef SYS_stat
89 ret = __syscall(SYS_stat, buf, &kst);
90#else
91 ret = __syscall(SYS_fstatat, AT_FDCWD, buf, &kst, 0);
92#endif
93 }
94 }
95 }
96#ifdef SYS_lstat
97 else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
98 ret = __syscall(SYS_lstat, path, &kst);
99#endif
100#ifdef SYS_stat
101 else if ((fd == AT_FDCWD || *path=='/') && !flag)
102 ret = __syscall(SYS_stat, path, &kst);
103#endif
104 else ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
105
106 if (ret) return ret;
107
108 *st = (struct stat){
109 .st_dev = kst.st_dev,
110 .st_ino = kst.st_ino,
111 .st_mode = kst.st_mode,
112 .st_nlink = kst.st_nlink,
113 .st_uid = kst.st_uid,
114 .st_gid = kst.st_gid,
115 .st_rdev = kst.st_rdev,
116 .st_size = kst.st_size,
117 .st_blksize = kst.st_blksize,
118 .st_blocks = kst.st_blocks,
119 .st_atim.tv_sec = kst.st_atime_sec,
120 .st_atim.tv_nsec = kst.st_atime_nsec,
121 .st_mtim.tv_sec = kst.st_mtime_sec,
122 .st_mtim.tv_nsec = kst.st_mtime_nsec,
123 .st_ctim.tv_sec = kst.st_ctime_sec,
124 .st_ctim.tv_nsec = kst.st_ctime_nsec,
125#if _REDIR_TIME64
126 .__st_atim32.tv_sec = kst.st_atime_sec,
127 .__st_atim32.tv_nsec = kst.st_atime_nsec,
128 .__st_mtim32.tv_sec = kst.st_mtime_sec,
129 .__st_mtim32.tv_nsec = kst.st_mtime_nsec,
130 .__st_ctim32.tv_sec = kst.st_ctime_sec,
131 .__st_ctim32.tv_nsec = kst.st_ctime_nsec,
132#endif
133 };
134
135 return 0;
136}
137#endif
138
139int __fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
140{
141 int ret;
142#ifdef SYS_fstatat
143 if (sizeof((struct kstat){0}.st_atime_sec) < sizeof(time_t)) {
144 ret = fstatat_statx(fd, path, st, flag);
145 if (ret!=-ENOSYS) return __syscall_ret(ret);
146 }
147 ret = fstatat_kstat(fd, path, st, flag);
148#else
149 ret = fstatat_statx(fd, path, st, flag);
150#endif
151 return __syscall_ret(ret);
152}
153
154weak_alias(__fstatat, fstatat);