| 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 | // <filesystem> |
| 15 | |
| 16 | // recursive_directory_iterator |
| 17 | |
| 18 | #include <filesystem> |
| 19 | #include <type_traits> |
| 20 | #include <set> |
| 21 | #include <cassert> |
| 22 | |
| 23 | #include "test_macros.h" |
| 24 | #include "filesystem_test_helper.h" |
| 25 | namespace fs = std::filesystem; |
| 26 | |
| 27 | #if defined(_WIN32) |
| 28 | static void set_last_write_time_in_iteration(const fs::path& dir) { |
| 29 | // Windows can postpone updating last write time for file especially for |
| 30 | // directory because last write time of directory depends of its childs. |
| 31 | // See |
| 32 | // https://learn.microsoft.com/en-us/windows/win32/sysinfo/file-times |
| 33 | // To force updating file entries calls "last_write_time" with own value. |
| 34 | const fs::recursive_directory_iterator end_it{}; |
| 35 | |
| 36 | std::error_code ec; |
| 37 | fs::recursive_directory_iterator it(dir, ec); |
| 38 | assert(!ec); |
| 39 | |
| 40 | fs::file_time_type now_time = fs::file_time_type::clock::now(); |
| 41 | for (; it != end_it; ++it) { |
| 42 | const fs::path entry = *it; |
| 43 | fs::last_write_time(entry, now_time, ec); |
| 44 | assert(!ec); |
| 45 | } |
| 46 | |
| 47 | assert(it == end_it); |
| 48 | } |
| 49 | |
| 50 | struct directory_entry_and_values { |
| 51 | fs::directory_entry entry; |
| 52 | |
| 53 | fs::file_status symlink_status; |
| 54 | fs::file_status status; |
| 55 | std::uintmax_t file_size; |
| 56 | fs::file_time_type last_write_time; |
| 57 | }; |
| 58 | |
| 59 | std::vector<directory_entry_and_values> |
| 60 | get_directory_entries_for(const fs::path& dir, const std::set<fs::path>& dir_contents) { |
| 61 | const fs::recursive_directory_iterator end_it{}; |
| 62 | |
| 63 | std::error_code ec; |
| 64 | fs::recursive_directory_iterator it(dir, ec); |
| 65 | assert(!ec); |
| 66 | |
| 67 | std::vector<directory_entry_and_values> dir_entries; |
| 68 | std::set<fs::path> unseen_entries = dir_contents; |
| 69 | while (!unseen_entries.empty()) { |
| 70 | assert(it != end_it); |
| 71 | const fs::directory_entry& entry = *it; |
| 72 | |
| 73 | assert(unseen_entries.erase(entry.path()) == 1); |
| 74 | |
| 75 | dir_entries.push_back(directory_entry_and_values{ |
| 76 | .entry = entry, |
| 77 | .symlink_status = entry.symlink_status(), |
| 78 | .status = entry.status(), |
| 79 | .file_size = entry.is_regular_file() ? entry.file_size() : 0, |
| 80 | .last_write_time = entry.last_write_time()}); |
| 81 | |
| 82 | fs::recursive_directory_iterator& it_ref = it.increment(ec); |
| 83 | assert(!ec); |
| 84 | assert(&it_ref == &it); |
| 85 | } |
| 86 | return dir_entries; |
| 87 | } |
| 88 | #endif // _WIN32 |
| 89 | |
| 90 | // Checks that the directory_entry properties will be the same before and after |
| 91 | // calling "refresh" in case of iteration. |
| 92 | // In case of Windows expects that directory_entry caches the properties during |
| 93 | // iteration. |
| 94 | static void test_cache_and_refresh_in_iteration() { |
| 95 | static_test_env static_env; |
| 96 | const fs::path test_dir = static_env.Dir; |
| 97 | #if defined(_WIN32) |
| 98 | set_last_write_time_in_iteration(test_dir); |
| 99 | #endif |
| 100 | const std::set<fs::path> dir_contents(static_env.RecDirIterationList.begin(), static_env.RecDirIterationList.end()); |
| 101 | const fs::recursive_directory_iterator end_it{}; |
| 102 | |
| 103 | std::error_code ec; |
| 104 | fs::recursive_directory_iterator it(test_dir, ec); |
| 105 | assert(!ec); |
| 106 | |
| 107 | std::set<fs::path> unseen_entries = dir_contents; |
| 108 | while (!unseen_entries.empty()) { |
| 109 | assert(it != end_it); |
| 110 | const fs::directory_entry& entry = *it; |
| 111 | |
| 112 | assert(unseen_entries.erase(entry.path()) == 1); |
| 113 | |
| 114 | fs::file_status symlink_status = entry.symlink_status(); |
| 115 | fs::file_status status = entry.status(); |
| 116 | std::uintmax_t file_size = entry.is_regular_file() ? entry.file_size() : 0; |
| 117 | fs::file_time_type last_write_time = entry.last_write_time(); |
| 118 | |
| 119 | fs::directory_entry mutable_entry = *it; |
| 120 | mutable_entry.refresh(); |
| 121 | fs::file_status upd_symlink_status = mutable_entry.symlink_status(); |
| 122 | fs::file_status upd_status = mutable_entry.status(); |
| 123 | std::uintmax_t upd_file_size = mutable_entry.is_regular_file() ? mutable_entry.file_size() : 0; |
| 124 | fs::file_time_type upd_last_write_time = mutable_entry.last_write_time(); |
| 125 | assert(upd_symlink_status.type() == symlink_status.type() && |
| 126 | upd_symlink_status.permissions() == symlink_status.permissions()); |
| 127 | assert(upd_status.type() == status.type() && upd_status.permissions() == status.permissions()); |
| 128 | assert(upd_file_size == file_size); |
| 129 | assert(upd_last_write_time == last_write_time); |
| 130 | |
| 131 | fs::recursive_directory_iterator& it_ref = it.increment(ec&: ec); |
| 132 | assert(!ec); |
| 133 | assert(&it_ref == &it); |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | #if defined(_WIN32) |
| 138 | // In case of Windows expects that the directory_entry caches the properties |
| 139 | // during iteration and the properties don't change after deleting folders |
| 140 | // and files. |
| 141 | static void test_cached_values_in_iteration() { |
| 142 | std::vector<directory_entry_and_values> dir_entries; |
| 143 | { |
| 144 | static_test_env static_env; |
| 145 | const fs::path testDir = static_env.Dir; |
| 146 | set_last_write_time_in_iteration(testDir); |
| 147 | const std::set<fs::path> dir_contents(static_env.RecDirIterationList.begin(), static_env.RecDirIterationList.end()); |
| 148 | dir_entries = get_directory_entries_for(testDir, dir_contents); |
| 149 | } |
| 150 | // Testing folder should be deleted after destoying static_test_env. |
| 151 | |
| 152 | for (const auto& dir_entry : dir_entries) { |
| 153 | // During iteration Windows provides information only about symlink itself |
| 154 | // not about file/folder which symlink points to. |
| 155 | if (dir_entry.entry.is_symlink()) { |
| 156 | // Check that symlink is not using cached value about existing file. |
| 157 | assert(!dir_entry.entry.exists()); |
| 158 | } else { |
| 159 | // Check that entry uses cached value about existing file. |
| 160 | assert(dir_entry.entry.exists()); |
| 161 | } |
| 162 | fs::file_status symlink_status = dir_entry.entry.symlink_status(); |
| 163 | assert(dir_entry.symlink_status.type() == symlink_status.type() && |
| 164 | dir_entry.symlink_status.permissions() == symlink_status.permissions()); |
| 165 | |
| 166 | if (!dir_entry.entry.is_symlink()) { |
| 167 | fs::file_status status = dir_entry.entry.status(); |
| 168 | assert(dir_entry.status.type() == status.type() && dir_entry.status.permissions() == status.permissions()); |
| 169 | |
| 170 | std::uintmax_t file_size = dir_entry.entry.is_regular_file() ? dir_entry.entry.file_size() : 0; |
| 171 | assert(dir_entry.file_size == file_size); |
| 172 | |
| 173 | fs::file_time_type last_write_time = dir_entry.entry.last_write_time(); |
| 174 | assert(dir_entry.last_write_time == last_write_time); |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | #endif // _WIN32 |
| 179 | |
| 180 | int main(int, char**) { |
| 181 | test_cache_and_refresh_in_iteration(); |
| 182 | #if defined(_WIN32) |
| 183 | test_cached_values_in_iteration(); |
| 184 | #endif |
| 185 | |
| 186 | return 0; |
| 187 | } |
| 188 | |