1 /* Tests of symlinkat and readlinkat.
2 Copyright (C) 2009 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));
36 # define HAVE_SYMLINK 0
39 #define ASSERT(expr) \
44 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
51 #define BASE "test-symlinkat.t"
53 #include "test-readlink.h"
54 #include "test-symlink.h"
56 static int dfd = AT_FDCWD;
59 do_symlink (char const *contents, char const *name)
61 return symlinkat (contents, dfd, name);
65 do_readlink (char const *name, char *buf, size_t len)
67 return readlinkat (dfd, name, buf, len);
76 /* Remove any leftovers from a previous partial run. */
77 ASSERT (system ("rm -rf " BASE "*") == 0);
79 /* Perform same checks as counterpart functions. */
80 result = test_readlink (do_readlink, false);
81 ASSERT (test_symlink (do_symlink, false) == result);
82 dfd = openat (AT_FDCWD, ".", O_RDONLY);
84 ASSERT (test_readlink (do_readlink, false) == result);
85 ASSERT (test_symlink (do_symlink, false) == result);
87 /* Now perform some cross-directory checks. Skip everything else on
91 const char *contents = "don't matter!";
92 ssize_t exp = strlen (contents);
94 /* Create link while cwd is '.', then read it in '..'. */
95 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == 0);
97 ASSERT (symlinkat (contents, dfd, BASE "link") == -1);
98 ASSERT (errno == EEXIST);
99 ASSERT (chdir ("..") == 0);
101 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == -1);
102 ASSERT (errno == ENOENT);
103 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
104 ASSERT (strncmp (contents, buf, exp) == 0);
105 ASSERT (unlinkat (dfd, BASE "link", 0) == 0);
107 /* Create link while cwd is '..', then read it in '.'. */
108 ASSERT (symlinkat (contents, dfd, BASE "link") == 0);
109 ASSERT (fchdir (dfd) == 0);
111 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == -1);
112 ASSERT (errno == EEXIST);
114 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == exp);
115 ASSERT (strncmp (contents, buf, exp) == 0);
117 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
118 ASSERT (strncmp (contents, buf, exp) == 0);
119 ASSERT (unlink (BASE "link") == 0);
122 ASSERT (close (dfd) == 0);
124 fputs ("skipping test: symlinks not supported on this file system\n",