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/fcntl/open.h"
10#include "src/unistd/close.h"
11#include "src/unistd/symlink.h"
12#include "src/unistd/unlink.h"
13#include "test/UnitTest/ErrnoCheckingTest.h"
14#include "test/UnitTest/ErrnoSetterMatcher.h"
15#include "test/UnitTest/Test.h"
16
17#include <sys/stat.h>
18
19using LlvmLibcSymlinkTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
20
21TEST_F(LlvmLibcSymlinkTest, CreateAndUnlink) {
22 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Succeeds;
23 constexpr const char *FILENAME = "symlink.test";
24 auto TEST_FILE_BASE = libc_make_test_file_path(FILENAME);
25 constexpr const char *FILENAME2 = "symlink.test";
26 auto TEST_FILE = libc_make_test_file_path(FILENAME2);
27 constexpr const char *FILENAME3 = "symlink.test.symlink";
28 auto TEST_FILE_LINK = libc_make_test_file_path(FILENAME3);
29
30 // The test strategy is as follows:
31 // 1. Create a normal file
32 // 2. Create a symlink to that file.
33 // 3. Open the symlink to check that the symlink was created.
34 // 4. Cleanup the file and its symlink.
35 int write_fd = LIBC_NAMESPACE::open(TEST_FILE, O_WRONLY | O_CREAT, S_IRWXU);
36 ASSERT_ERRNO_SUCCESS();
37 ASSERT_GT(write_fd, 0);
38 ASSERT_THAT(LIBC_NAMESPACE::close(write_fd), Succeeds(0));
39
40 ASSERT_THAT(LIBC_NAMESPACE::symlink(TEST_FILE_BASE, TEST_FILE_LINK),
41 Succeeds(0));
42
43 int symlink_fd = LIBC_NAMESPACE::open(TEST_FILE_LINK, O_PATH);
44 ASSERT_GT(symlink_fd, 0);
45 ASSERT_ERRNO_SUCCESS();
46 ASSERT_THAT(LIBC_NAMESPACE::close(symlink_fd), Succeeds(0));
47
48 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE), Succeeds(0));
49 ASSERT_THAT(LIBC_NAMESPACE::unlink(TEST_FILE_LINK), Succeeds(0));
50}
51
52TEST_F(LlvmLibcSymlinkTest, SymlinkInNonExistentPath) {
53 using LIBC_NAMESPACE::testing::ErrnoSetterMatcher::Fails;
54 ASSERT_THAT(LIBC_NAMESPACE::symlink("non-existent-dir/non-existent-file",
55 "non-existent-dir/bad-symlink"),
56 Fails(ENOENT));
57}
58

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source code of libc/test/src/unistd/symlink_test.cpp