1 /* Tests of readlinkat.
2 Copyright (C) 2009-2011 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 (readlinkat, ssize_t, (int, char const *, char *, size_t));
34 #include "ignore-value.h"
38 # define HAVE_SYMLINK 0
41 #define BASE "test-readlinkat.t"
43 #include "test-readlink.h"
45 static int dfd = AT_FDCWD;
48 do_readlink (char const *name, char *buf, size_t len)
50 return readlinkat (dfd, name, buf, len);
59 /* Remove any leftovers from a previous partial run. */
60 ignore_value (system ("rm -rf " BASE "*"));
62 /* Test behaviour for invalid file descriptors. */
65 ASSERT (readlinkat (-1, "foo", buf, sizeof buf) == -1);
66 ASSERT (errno == EBADF);
70 ASSERT (readlinkat (99, "foo", buf, sizeof buf) == -1);
71 ASSERT (errno == EBADF);
74 /* Perform same checks as counterpart functions. */
75 result = test_readlink (do_readlink, false);
76 dfd = openat (AT_FDCWD, ".", O_RDONLY);
78 ASSERT (test_readlink (do_readlink, false) == result);
80 /* Now perform some cross-directory checks. Skip everything else on
84 const char *contents = "don't matter!";
85 ssize_t exp = strlen (contents);
87 /* Create link while cwd is '.', then read it in '..'. */
88 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == 0);
90 ASSERT (symlinkat (contents, dfd, BASE "link") == -1);
91 ASSERT (errno == EEXIST);
92 ASSERT (chdir ("..") == 0);
94 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == -1);
95 ASSERT (errno == ENOENT);
96 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
97 ASSERT (strncmp (contents, buf, exp) == 0);
98 ASSERT (unlinkat (dfd, BASE "link", 0) == 0);
100 /* Create link while cwd is '..', then read it in '.'. */
101 ASSERT (symlinkat (contents, dfd, BASE "link") == 0);
102 ASSERT (fchdir (dfd) == 0);
104 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == -1);
105 ASSERT (errno == EEXIST);
107 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == exp);
108 ASSERT (strncmp (contents, buf, exp) == 0);
110 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
111 ASSERT (strncmp (contents, buf, exp) == 0);
112 ASSERT (unlink (BASE "link") == 0);
115 ASSERT (close (dfd) == 0);
117 fputs ("skipping test: symlinks not supported on this file system\n",