1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 * Author: David Fenner, Jon Hendrickson
5 * Copyright (C) 2024 Andrea Cervesato <andrea.cervesato@suse.com>
6 */
7
8 /*\
9 * [Description]
10 *
11 * This test checks that stat() executed on file provide the same information
12 * of symlink linking to it.
13 */
14
15 #include <stdlib.h>
16 #include "tst_test.h"
17 #include "tst_safe_stdio.h"
18
19 #define FILENAME "file.txt"
20 #define MNTPOINT "mntpoint"
21 #define SYMBNAME MNTPOINT"/file_symlink"
22
23 static char *symb_path;
24 static char *file_path;
25 static struct stat *file_stat;
26 static struct stat *symb_stat;
27
run(void)28 static void run(void)
29 {
30 SAFE_STAT(file_path, file_stat);
31 SAFE_STAT(symb_path, symb_stat);
32
33 TST_EXP_EQ_LI(file_stat->st_dev, symb_stat->st_dev);
34 TST_EXP_EQ_LI(file_stat->st_mode, symb_stat->st_mode);
35 TST_EXP_EQ_LI(file_stat->st_nlink, symb_stat->st_nlink);
36 TST_EXP_EQ_LI(file_stat->st_uid, symb_stat->st_uid);
37 TST_EXP_EQ_LI(file_stat->st_gid, symb_stat->st_gid);
38 TST_EXP_EQ_LI(file_stat->st_size, symb_stat->st_size);
39 TST_EXP_EQ_LI(file_stat->st_atime, symb_stat->st_atime);
40 TST_EXP_EQ_LI(file_stat->st_mtime, symb_stat->st_mtime);
41 TST_EXP_EQ_LI(file_stat->st_ctime, symb_stat->st_ctime);
42 }
43
setup(void)44 static void setup(void)
45 {
46 char opt_bsize[32];
47 const char *const fs_opts[] = {opt_bsize, NULL};
48 struct stat sb;
49 int pagesize;
50 int fd;
51
52 file_path = tst_tmpdir_genpath(FILENAME);
53 symb_path = tst_tmpdir_genpath(SYMBNAME);
54
55 /* change st_blksize / st_dev */
56 SAFE_STAT(".", &sb);
57 pagesize = sb.st_blksize == 4096 ? 1024 : 4096;
58
59 snprintf(opt_bsize, sizeof(opt_bsize), "-b %i", pagesize);
60 SAFE_MKFS(tst_device->dev, tst_device->fs_type, fs_opts, NULL);
61 SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, 0);
62
63 SAFE_TOUCH(FILENAME, 0777, NULL);
64
65 /* change st_nlink */
66 SAFE_LINK(FILENAME, "linked_file");
67
68 /* change st_uid and st_gid */
69 SAFE_CHOWN(FILENAME, 1000, 1000);
70
71 /* change st_size */
72 fd = SAFE_OPEN(FILENAME, O_WRONLY, 0777);
73 tst_fill_fd(fd, 'a', TST_KB, 500);
74 SAFE_CLOSE(fd);
75
76 /* change st_atime / st_mtime / st_ctime */
77 usleep(1001000);
78
79 SAFE_SYMLINK(file_path, symb_path);
80 }
81
cleanup(void)82 static void cleanup(void)
83 {
84 if (tst_is_mounted(MNTPOINT))
85 SAFE_UMOUNT(MNTPOINT);
86 }
87
88 static struct tst_test test = {
89 .setup = setup,
90 .cleanup = cleanup,
91 .test_all = run,
92 .needs_root = 1,
93 .needs_device = 1,
94 .mntpoint = MNTPOINT,
95 .bufs = (struct tst_buffers []) {
96 {&file_stat, .size = sizeof(struct stat)},
97 {&symb_stat, .size = sizeof(struct stat)},
98 {}
99 }
100 };
101