1 /* Tests of areadlinkat.
2 Copyright (C) 2009-2018 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
18
19 #include <config.h>
20
21 #include "areadlink.h"
22
23 #include <fcntl.h>
24 #include <errno.h>
25 #include <stdbool.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <sys/stat.h>
30 #include <unistd.h>
31
32 #include "ignore-value.h"
33 #include "macros.h"
34
35 #define BASE "test-areadlinkat.t"
36
37 #include "test-areadlink.h"
38
39 static int dfd = AT_FDCWD;
40
41 /* Wrapper for testing areadlinkat. */
42 static char *
do_areadlinkat(char const * name,size_t ignored _GL_UNUSED)43 do_areadlinkat (char const *name, size_t ignored _GL_UNUSED)
44 {
45 return areadlinkat (dfd, name);
46 }
47
48 int
main(void)49 main (void)
50 {
51 int result;
52
53 /* Remove any leftovers from a previous partial run. */
54 ignore_value (system ("rm -rf " BASE "*"));
55
56 /* Basic tests. */
57 result = test_areadlink (do_areadlinkat, false);
58 dfd = open (".", O_RDONLY);
59 ASSERT (0 <= dfd);
60 ASSERT (test_areadlink (do_areadlinkat, false) == result);
61
62 /* Relative tests. */
63 if (result == 77)
64 fputs ("skipping test: symlinks not supported on this file system\n",
65 stderr);
66 else
67 {
68 char *buf;
69 ASSERT (symlink ("nowhere", BASE "link") == 0);
70 ASSERT (mkdir (BASE "dir", 0700) == 0);
71 ASSERT (chdir (BASE "dir") == 0);
72 buf = areadlinkat (dfd, BASE "link");
73 ASSERT (buf);
74 ASSERT (strcmp (buf, "nowhere") == 0);
75 free (buf);
76 errno = 0;
77 ASSERT (areadlinkat (-1, BASE "link") == NULL);
78 ASSERT (errno == EBADF);
79 errno = 0;
80 ASSERT (areadlinkat (AT_FDCWD, BASE "link") == NULL);
81 ASSERT (errno == ENOENT);
82 ASSERT (chdir ("..") == 0);
83 ASSERT (rmdir (BASE "dir") == 0);
84 ASSERT (unlink (BASE "link") == 0);
85 }
86
87 ASSERT (close (dfd) == 0);
88 return result;
89 }
90