1 //===----------------------------------------------------------------------===//
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 // REQUIRES: can-create-symlinks
10 // UNSUPPORTED: c++03, c++11, c++14
11 // UNSUPPORTED: no-filesystem
12 // UNSUPPORTED: availability-filesystem-missing
13
14 // Starting in Android N (API 24), SELinux policy prevents the shell user from
15 // creating a hard link.
16 // XFAIL: LIBCXX-ANDROID-FIXME && !android-device-api={{21|22|23}}
17
18 // <filesystem>
19
20 // void create_hard_link(const path& existing_symlink, const path& new_symlink);
21 // void create_hard_link(const path& existing_symlink, const path& new_symlink,
22 // error_code& ec) noexcept;
23
24 #include <filesystem>
25
26 #include "test_macros.h"
27 #include "filesystem_test_helper.h"
28 namespace fs = std::filesystem;
29 using namespace fs;
30
test_signatures()31 static void test_signatures()
32 {
33 const path p; ((void)p);
34 std::error_code ec; ((void)ec);
35 ASSERT_NOT_NOEXCEPT(fs::create_hard_link(p, p));
36 ASSERT_NOEXCEPT(fs::create_hard_link(p, p, ec));
37 }
38
test_error_reporting()39 static void test_error_reporting()
40 {
41 scoped_test_env env;
42 const path file = env.create_file("file1", 42);
43 const path file2 = env.create_file("file2", 55);
44 const path sym = env.create_symlink(file, "sym");
45 { // destination exists
46 std::error_code ec;
47 fs::create_hard_link(sym, file2, ec);
48 assert(ec);
49 }
50 }
51
create_file_hard_link()52 static void create_file_hard_link()
53 {
54 scoped_test_env env;
55 const path file = env.create_file("file");
56 const path dest = env.make_env_path("dest1");
57 std::error_code ec;
58 assert(hard_link_count(file) == 1);
59 fs::create_hard_link(file, dest, ec);
60 assert(!ec);
61 assert(exists(dest));
62 assert(equivalent(dest, file));
63 assert(hard_link_count(file) == 2);
64 }
65
create_directory_hard_link_fails()66 static void create_directory_hard_link_fails()
67 {
68 scoped_test_env env;
69 const path dir = env.create_dir("dir");
70 const path dest = env.make_env_path("dest2");
71 std::error_code ec;
72
73 fs::create_hard_link(dir, dest, ec);
74 assert(ec);
75 }
76
main(int,char **)77 int main(int, char**) {
78 test_signatures();
79 test_error_reporting();
80 create_file_hard_link();
81 create_directory_hard_link_fails();
82
83 return 0;
84 }
85