1 //===-- Unittests for symlink ---------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "src/errno/libc_errno.h"
10 #include "src/fcntl/open.h"
11 #include "src/unistd/close.h"
12 #include "src/unistd/symlink.h"
13 #include "src/unistd/unlink.h"
14 #include "test/UnitTest/ErrnoSetterMatcher.h"
15 #include "test/UnitTest/Test.h"
16
17 #include <sys/stat.h>
18
TEST(LlvmLibcSymlinkTest,CreateAndUnlink)19 TEST(LlvmLibcSymlinkTest, CreateAndUnlink) {
20 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
21 constexpr const char *FILENAME = "symlink.test";
22 auto TEST_FILE_BASE = libc_make_test_file_path(FILENAME);
23 constexpr const char *FILENAME2 = "symlink.test";
24 auto TEST_FILE = libc_make_test_file_path(FILENAME2);
25 constexpr const char *FILENAME3 = "symlink.test.symlink";
26 auto TEST_FILE_LINK = libc_make_test_file_path(FILENAME3);
27
28 // The test strategy is as follows:
29 // 1. Create a normal file
30 // 2. Create a symlink to that file.
31 // 3. Open the symlink to check that the symlink was created.
32 // 4. Cleanup the file and its symlink.
33 LIBC_NAMESPACE::libc_errno = 0;
34 int write_fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
35 ASSERT_ERRNO_SUCCESS();
36 ASSERT_GT(write_fd, 0);
37 ASSERT_THAT(LIBC_NAMESPACE::close(write_fd), Succeeds(0));
38
39 ASSERT_THAT(LIBC_NAMESPACE::symlink(TEST_FILE_BASE, TEST_FILE_LINK),
40 Succeeds(0));
41
42 int symlink_fd = LIBC_NAMESPACE::open(TEST_FILE_LINK, O_PATH);
43 ASSERT_GT(symlink_fd, 0);
44 ASSERT_ERRNO_SUCCESS();
45 ASSERT_THAT(LIBC_NAMESPACE::close(symlink_fd), Succeeds(0));
46
47 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));
48 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE_LINK), Succeeds(0));
49 }
50
TEST(LlvmLibcSymlinkTest,SymlinkInNonExistentPath)51 TEST(LlvmLibcSymlinkTest, SymlinkInNonExistentPath) {
52 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
53 ASSERT_THAT(LIBC_NAMESPACE::symlink("non-existent-dir/non-existent-file",
54 "non-existent-dir/bad-symlink"),
55 Fails(ENOENT));
56 }
57