1 /* Tests of symlinkat and readlinkat.
2 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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.
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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
23 #include "signature.h"
24 SIGNATURE_CHECK (symlinkat, int, (char const *, int, char const *));
25 SIGNATURE_CHECK (readlinkat, ssize_t, (int, char const *, char *, size_t));
35 #include "ignore-value.h"
39 # define HAVE_SYMLINK 0
42 #define BASE "test-symlinkat.t"
44 #include "test-readlink.h"
45 #include "test-symlink.h"
47 static int dfd = AT_FDCWD;
50 do_symlink (char const *contents, char const *name)
52 return symlinkat (contents, dfd, name);
56 do_readlink (char const *name, char *buf, size_t len)
58 return readlinkat (dfd, name, buf, len);
67 /* Remove any leftovers from a previous partial run. */
68 ignore_value (system ("rm -rf " BASE "*"));
70 /* Perform same checks as counterpart functions. */
71 result = test_readlink (do_readlink, false);
72 ASSERT (test_symlink (do_symlink, false) == result);
73 dfd = openat (AT_FDCWD, ".", O_RDONLY);
75 ASSERT (test_readlink (do_readlink, false) == result);
76 ASSERT (test_symlink (do_symlink, false) == result);
78 /* Now perform some cross-directory checks. Skip everything else on
82 const char *contents = "don't matter!";
83 ssize_t exp = strlen (contents);
85 /* Create link while cwd is '.', then read it in '..'. */
86 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == 0);
88 ASSERT (symlinkat (contents, dfd, BASE "link") == -1);
89 ASSERT (errno == EEXIST);
90 ASSERT (chdir ("..") == 0);
92 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == -1);
93 ASSERT (errno == ENOENT);
94 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
95 ASSERT (strncmp (contents, buf, exp) == 0);
96 ASSERT (unlinkat (dfd, BASE "link", 0) == 0);
98 /* Create link while cwd is '..', then read it in '.'. */
99 ASSERT (symlinkat (contents, dfd, BASE "link") == 0);
100 ASSERT (fchdir (dfd) == 0);
102 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == -1);
103 ASSERT (errno == EEXIST);
105 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == exp);
106 ASSERT (strncmp (contents, buf, exp) == 0);
108 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
109 ASSERT (strncmp (contents, buf, exp) == 0);
110 ASSERT (unlink (BASE "link") == 0);
113 ASSERT (close (dfd) == 0);
115 fputs ("skipping test: symlinks not supported on this file system\n",