1/* Test for realpath/canonicalize function.
2 Copyright (C) 1998-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <string.h>
21
22
23/* Prototype for our test function. */
24extern void do_prepare (int argc, char *argv[]);
25extern int do_test (int argc, char *argv[]);
26
27/* We have a preparation function. */
28#define PREPARE do_prepare
29
30#include <test-skeleton.c>
31
32/* Name of the temporary files we create. */
33char *name1;
34char *name2;
35
36/* Preparation. */
37void
38do_prepare (int argc, char *argv[])
39{
40 size_t test_dir_len;
41
42 test_dir_len = strlen (test_dir);
43
44 /* Generate the circular symlinks. */
45 name1 = malloc (size: test_dir_len + sizeof ("/canonXXXXXX"));
46 mempcpy (mempcpy (name1, test_dir, test_dir_len),
47 "/canonXXXXXX", sizeof ("/canonXXXXXX"));
48 name2 = strdup (s: name1);
49
50 add_temp_file (name: mktemp (template: name1));
51 add_temp_file (name: mktemp (template: name2));
52}
53
54
55/* Run the test. */
56int
57do_test (int argc, char *argv[])
58{
59 char *canon;
60
61 printf (format: "create symlinks from %s to %s and vice versa\n", name1, name2);
62 if (symlink (from: name1, to: name2) == -1
63 || symlink (from: name2, to: name1) == -1)
64 /* We cannot test this. */
65 return 0;
66
67 /* Call the function. This is equivalent the using `realpath' but the
68 function allocates the room for the result. */
69 errno = 0;
70 canon = canonicalize_file_name (name: name1);
71
72 return canon != NULL || errno != ELOOP;
73}
74

source code of glibc/stdlib/test-canon2.c