1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) International Business Machines Corp., 2001
4 * Copyright (c) Linux Test Project, 2001-2023
5 * Author: John George
6 */
7
8 /*\
9 * [Description]
10 *
11 * Check that a symbolic link may point to an existing file or
12 * to a nonexistent one.
13 */
14
15 #include <stdlib.h>
16 #include <stdio.h>
17 #include "tst_test.h"
18
19 #define TESTFILE "testfile"
20 #define NONFILE "noexistfile"
21 #define SYMFILE "slink_file"
22
23 static char *testfile;
24 static char *nonfile;
25
26 static struct tcase {
27 char **srcfile;
28 } tcases[] = {
29 {&testfile},
30 {&nonfile},
31 };
32
setup(void)33 static void setup(void)
34 {
35 SAFE_TOUCH(TESTFILE, 0644, NULL);
36 }
37
verify_symlink(unsigned int i)38 static void verify_symlink(unsigned int i)
39 {
40 struct tcase *tc = &tcases[i];
41
42 struct stat stat_buf;
43
44 TST_EXP_PASS(symlink(*tc->srcfile, SYMFILE));
45
46 SAFE_LSTAT(SYMFILE, &stat_buf);
47
48 if (!S_ISLNK(stat_buf.st_mode))
49 tst_res(TFAIL, "symlink of %s doesn't exist", *tc->srcfile);
50
51 SAFE_UNLINK(SYMFILE);
52 }
53
54 static struct tst_test test = {
55 .tcnt = ARRAY_SIZE(tcases),
56 .setup = setup,
57 .test = verify_symlink,
58 .bufs = (struct tst_buffers []) {
59 {&testfile, .str = TESTFILE},
60 {&nonfile, .str = NONFILE},
61 {},
62 },
63 .needs_tmpdir = 1,
64 };
65