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. */
24 extern void do_prepare (int argc, char *argv[]);
25 extern 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. */
33 char *name1;
34 char *name2;
35
36 /* Preparation. */
37 void
do_prepare(int argc,char * argv[])38 do_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 (test_dir_len + sizeof ("/canonXXXXXX"));
46 mempcpy (mempcpy (name1, test_dir, test_dir_len),
47 "/canonXXXXXX", sizeof ("/canonXXXXXX"));
48 name2 = strdup (name1);
49
50 add_temp_file (mktemp (name1));
51 add_temp_file (mktemp (name2));
52 }
53
54
55 /* Run the test. */
56 int
do_test(int argc,char * argv[])57 do_test (int argc, char *argv[])
58 {
59 char *canon;
60
61 printf ("create symlinks from %s to %s and vice versa\n", name1, name2);
62 if (symlink (name1, name2) == -1
63 || symlink (name2, 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 (name1);
71
72 return canon != NULL || errno != ELOOP;
73 }
74