Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* Test the statx() system call.
2 *
3 * Note that the output of this program is intended to look like the output of
4 * /bin/stat where possible.
5 *
6 * Copyright (C) 2015 Red Hat, Inc. All Rights Reserved.
7 * Written by David Howells (dhowells@redhat.com)
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public Licence
11 * as published by the Free Software Foundation; either version
12 * 2 of the Licence, or (at your option) any later version.
13 */
14
15#define _GNU_SOURCE
16#define _ATFILE_SOURCE
17#include <stdio.h>
18#include <stdlib.h>
19#include <string.h>
20#include <unistd.h>
21#include <ctype.h>
22#include <errno.h>
23#include <time.h>
24#include <sys/syscall.h>
25#include <sys/types.h>
26#include <linux/stat.h>
27#include <linux/fcntl.h>
28#include <sys/stat.h>
29
30#define AT_STATX_SYNC_TYPE 0x6000
31#define AT_STATX_SYNC_AS_STAT 0x0000
32#define AT_STATX_FORCE_SYNC 0x2000
33#define AT_STATX_DONT_SYNC 0x4000
34
35static __attribute__((unused))
36ssize_t statx(int dfd, const char *filename, unsigned flags,
37 unsigned int mask, struct statx *buffer)
38{
39 return syscall(__NR_statx, dfd, filename, flags, mask, buffer);
40}
41
42static void print_time(const char *field, struct statx_timestamp *ts)
43{
44 struct tm tm;
45 time_t tim;
46 char buffer[100];
47 int len;
48
49 tim = ts->tv_sec;
50 if (!localtime_r(&tim, &tm)) {
51 perror("localtime_r");
52 exit(1);
53 }
54 len = strftime(buffer, 100, "%F %T", &tm);
55 if (len == 0) {
56 perror("strftime");
57 exit(1);
58 }
59 printf("%s", field);
60 fwrite(buffer, 1, len, stdout);
61 printf(".%09u", ts->tv_nsec);
62 len = strftime(buffer, 100, "%z", &tm);
63 if (len == 0) {
64 perror("strftime2");
65 exit(1);
66 }
67 fwrite(buffer, 1, len, stdout);
68 printf("\n");
69}
70
71static void dump_statx(struct statx *stx)
72{
73 char buffer[256], ft = '?';
74
75 printf("results=%x\n", stx->stx_mask);
76
77 printf(" ");
78 if (stx->stx_mask & STATX_SIZE)
79 printf(" Size: %-15llu", (unsigned long long)stx->stx_size);
80 if (stx->stx_mask & STATX_BLOCKS)
81 printf(" Blocks: %-10llu", (unsigned long long)stx->stx_blocks);
82 printf(" IO Block: %-6llu", (unsigned long long)stx->stx_blksize);
83 if (stx->stx_mask & STATX_TYPE) {
84 switch (stx->stx_mode & S_IFMT) {
85 case S_IFIFO: printf(" FIFO\n"); ft = 'p'; break;
86 case S_IFCHR: printf(" character special file\n"); ft = 'c'; break;
87 case S_IFDIR: printf(" directory\n"); ft = 'd'; break;
88 case S_IFBLK: printf(" block special file\n"); ft = 'b'; break;
89 case S_IFREG: printf(" regular file\n"); ft = '-'; break;
90 case S_IFLNK: printf(" symbolic link\n"); ft = 'l'; break;
91 case S_IFSOCK: printf(" socket\n"); ft = 's'; break;
92 default:
93 printf(" unknown type (%o)\n", stx->stx_mode & S_IFMT);
94 break;
95 }
96 } else {
97 printf(" no type\n");
98 }
99
100 sprintf(buffer, "%02x:%02x", stx->stx_dev_major, stx->stx_dev_minor);
101 printf("Device: %-15s", buffer);
102 if (stx->stx_mask & STATX_INO)
103 printf(" Inode: %-11llu", (unsigned long long) stx->stx_ino);
104 if (stx->stx_mask & STATX_NLINK)
105 printf(" Links: %-5u", stx->stx_nlink);
106 if (stx->stx_mask & STATX_TYPE) {
107 switch (stx->stx_mode & S_IFMT) {
108 case S_IFBLK:
109 case S_IFCHR:
110 printf(" Device type: %u,%u",
111 stx->stx_rdev_major, stx->stx_rdev_minor);
112 break;
113 }
114 }
115 printf("\n");
116
117 if (stx->stx_mask & STATX_MODE)
118 printf("Access: (%04o/%c%c%c%c%c%c%c%c%c%c) ",
119 stx->stx_mode & 07777,
120 ft,
121 stx->stx_mode & S_IRUSR ? 'r' : '-',
122 stx->stx_mode & S_IWUSR ? 'w' : '-',
123 stx->stx_mode & S_IXUSR ? 'x' : '-',
124 stx->stx_mode & S_IRGRP ? 'r' : '-',
125 stx->stx_mode & S_IWGRP ? 'w' : '-',
126 stx->stx_mode & S_IXGRP ? 'x' : '-',
127 stx->stx_mode & S_IROTH ? 'r' : '-',
128 stx->stx_mode & S_IWOTH ? 'w' : '-',
129 stx->stx_mode & S_IXOTH ? 'x' : '-');
130 if (stx->stx_mask & STATX_UID)
131 printf("Uid: %5d ", stx->stx_uid);
132 if (stx->stx_mask & STATX_GID)
133 printf("Gid: %5d\n", stx->stx_gid);
134
135 if (stx->stx_mask & STATX_ATIME)
136 print_time("Access: ", &stx->stx_atime);
137 if (stx->stx_mask & STATX_MTIME)
138 print_time("Modify: ", &stx->stx_mtime);
139 if (stx->stx_mask & STATX_CTIME)
140 print_time("Change: ", &stx->stx_ctime);
141 if (stx->stx_mask & STATX_BTIME)
142 print_time(" Birth: ", &stx->stx_btime);
143
144 if (stx->stx_attributes_mask) {
145 unsigned char bits, mbits;
146 int loop, byte;
147
148 static char attr_representation[64 + 1] =
149 /* STATX_ATTR_ flags: */
150 "????????" /* 63-56 */
151 "????????" /* 55-48 */
152 "????????" /* 47-40 */
153 "????????" /* 39-32 */
154 "????????" /* 31-24 0x00000000-ff000000 */
155 "????????" /* 23-16 0x00000000-00ff0000 */
156 "???me???" /* 15- 8 0x00000000-0000ff00 */
157 "?dai?c??" /* 7- 0 0x00000000-000000ff */
158 ;
159
160 printf("Attributes: %016llx (", stx->stx_attributes);
161 for (byte = 64 - 8; byte >= 0; byte -= 8) {
162 bits = stx->stx_attributes >> byte;
163 mbits = stx->stx_attributes_mask >> byte;
164 for (loop = 7; loop >= 0; loop--) {
165 int bit = byte + loop;
166
167 if (!(mbits & 0x80))
168 putchar('.'); /* Not supported */
169 else if (bits & 0x80)
170 putchar(attr_representation[63 - bit]);
171 else
172 putchar('-'); /* Not set */
173 bits <<= 1;
174 mbits <<= 1;
175 }
176 if (byte)
177 putchar(' ');
178 }
179 printf(")\n");
180 }
181}
182
183static void dump_hex(unsigned long long *data, int from, int to)
184{
185 unsigned offset, print_offset = 1, col = 0;
186
187 from /= 8;
188 to = (to + 7) / 8;
189
190 for (offset = from; offset < to; offset++) {
191 if (print_offset) {
192 printf("%04x: ", offset * 8);
193 print_offset = 0;
194 }
195 printf("%016llx", data[offset]);
196 col++;
197 if ((col & 3) == 0) {
198 printf("\n");
199 print_offset = 1;
200 } else {
201 printf(" ");
202 }
203 }
204
205 if (!print_offset)
206 printf("\n");
207}
208
209int main(int argc, char **argv)
210{
211 struct statx stx;
212 int ret, raw = 0, atflag = AT_SYMLINK_NOFOLLOW;
213
214 unsigned int mask = STATX_ALL;
215
216 for (argv++; *argv; argv++) {
217 if (strcmp(*argv, "-F") == 0) {
218 atflag &= ~AT_STATX_SYNC_TYPE;
219 atflag |= AT_STATX_FORCE_SYNC;
220 continue;
221 }
222 if (strcmp(*argv, "-D") == 0) {
223 atflag &= ~AT_STATX_SYNC_TYPE;
224 atflag |= AT_STATX_DONT_SYNC;
225 continue;
226 }
227 if (strcmp(*argv, "-L") == 0) {
228 atflag &= ~AT_SYMLINK_NOFOLLOW;
229 continue;
230 }
231 if (strcmp(*argv, "-O") == 0) {
232 mask &= ~STATX_BASIC_STATS;
233 continue;
234 }
235 if (strcmp(*argv, "-A") == 0) {
236 atflag |= AT_NO_AUTOMOUNT;
237 continue;
238 }
239 if (strcmp(*argv, "-R") == 0) {
240 raw = 1;
241 continue;
242 }
243
244 memset(&stx, 0xbf, sizeof(stx));
245 ret = statx(AT_FDCWD, *argv, atflag, mask, &stx);
246 printf("statx(%s) = %d\n", *argv, ret);
247 if (ret < 0) {
248 perror(*argv);
249 exit(1);
250 }
251
252 if (raw)
253 dump_hex((unsigned long long *)&stx, 0, sizeof(stx));
254
255 dump_statx(&stx);
256 }
257 return 0;
258}