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. */
32 # define HAVE_SYMLINK 0
35 #define ASSERT(expr) \
40 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
47 #define BASE "test-symlinkat.t"
49 #include "test-readlink.h"
50 #include "test-symlink.h"
52 static int dfd = AT_FDCWD;
55 do_symlink (char const *contents, char const *name)
57 return symlinkat (contents, dfd, name);
61 do_readlink (char const *name, char *buf, size_t len)
63 return readlinkat (dfd, name, buf, len);
72 /* Remove any leftovers from a previous partial run. */
73 ASSERT (system ("rm -rf " BASE "*") == 0);
75 /* Perform same checks as counterpart functions. */
76 result = test_readlink (do_readlink, false);
77 ASSERT (test_symlink (do_symlink, false) == result);
78 dfd = openat (AT_FDCWD, ".", O_RDONLY);
80 ASSERT (test_readlink (do_readlink, false) == result);
81 ASSERT (test_symlink (do_symlink, false) == result);
83 /* Now perform some cross-directory checks. Skip everything else on
87 const char *contents = "don't matter!";
88 ssize_t exp = strlen (contents);
90 /* Create link while cwd is '.', then read it in '..'. */
91 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == 0);
93 ASSERT (symlinkat (contents, dfd, BASE "link") == -1);
94 ASSERT (errno == EEXIST);
95 ASSERT (chdir ("..") == 0);
97 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == -1);
98 ASSERT (errno == ENOENT);
99 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
100 ASSERT (strncmp (contents, buf, exp) == 0);
101 ASSERT (unlinkat (dfd, BASE "link", 0) == 0);
103 /* Create link while cwd is '..', then read it in '.'. */
104 ASSERT (symlinkat (contents, dfd, BASE "link") == 0);
105 ASSERT (fchdir (dfd) == 0);
107 ASSERT (symlinkat (contents, AT_FDCWD, BASE "link") == -1);
108 ASSERT (errno == EEXIST);
110 ASSERT (readlinkat (AT_FDCWD, BASE "link", buf, sizeof buf) == exp);
111 ASSERT (strncmp (contents, buf, exp) == 0);
113 ASSERT (readlinkat (dfd, BASE "link", buf, sizeof buf) == exp);
114 ASSERT (strncmp (contents, buf, exp) == 0);
115 ASSERT (unlink (BASE "link") == 0);
118 ASSERT (close (dfd) == 0);
120 fputs ("skipping test: symlinks not supported on this file system\n",