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4f09b58d1f
This unifies several things that used a 16-character random string, and a few other users of random identifiers where it also made sense to use a 16-character random string. TEST=crashpad_util_test RandomString.RandomString R=scottmg@chromium.org Review URL: https://codereview.chromium.org/1451793002 .
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "test/scoped_temp_dir.h"
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#include <windows.h>
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#include "base/logging.h"
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#include "base/strings/string16.h"
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#include "base/strings/stringprintf.h"
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#include "base/strings/utf_string_conversions.h"
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#include "util/misc/random_string.h"
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#include "gtest/gtest.h"
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namespace crashpad {
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namespace test {
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namespace {
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base::FilePath GenerateCandidateName() {
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wchar_t temp_path[MAX_PATH + 1];
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DWORD path_len = GetTempPath(MAX_PATH, temp_path);
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PCHECK(path_len != 0) << "GetTempPath";
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base::FilePath system_temp_dir(temp_path);
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base::string16 new_dir_name = base::UTF8ToUTF16(base::StringPrintf(
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"crashpad.test.%d.%s", GetCurrentProcessId(), RandomString().c_str()));
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return system_temp_dir.Append(new_dir_name);
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}
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const int kRetries = 50;
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} // namespace
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void ScopedTempDir::Rename() {
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for (int count = 0; count < kRetries; ++count) {
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// Try to move to a new temporary directory with a randomly generated name.
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// If the one we try exists, retry with a new name until we reach some
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// limit.
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base::FilePath target_path = GenerateCandidateName();
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if (MoveFileEx(path_.value().c_str(), target_path.value().c_str(), 0)) {
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path_ = target_path;
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return;
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}
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}
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CHECK(false) << "Couldn't move to a new unique temp dir";
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}
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// static
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base::FilePath ScopedTempDir::CreateTemporaryDirectory() {
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for (int count = 0; count < kRetries; ++count) {
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// Try to create a new temporary directory with random generated name. If
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// the one we generate exists, keep trying another path name until we reach
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// some limit.
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base::FilePath path_to_create = GenerateCandidateName();
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if (CreateDirectory(path_to_create.value().c_str(), NULL))
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return path_to_create;
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}
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CHECK(false) << "Couldn't create a new unique temp dir";
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return base::FilePath();
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}
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// static
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void ScopedTempDir::RecursivelyDeleteTemporaryDirectory(
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const base::FilePath& path) {
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const base::string16 all_files_mask(L"\\*");
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base::string16 search_mask = path.value() + all_files_mask;
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WIN32_FIND_DATA find_data;
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HANDLE search_handle = FindFirstFile(search_mask.c_str(), &find_data);
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if (search_handle == INVALID_HANDLE_VALUE)
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ASSERT_EQ(ERROR_FILE_NOT_FOUND, GetLastError());
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do {
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if (wcscmp(find_data.cFileName, L".") == 0 ||
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wcscmp(find_data.cFileName, L"..") == 0) {
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continue;
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}
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base::FilePath entry_path = path.Append(find_data.cFileName);
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ASSERT_FALSE(find_data.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT);
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if (find_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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RecursivelyDeleteTemporaryDirectory(entry_path);
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else
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EXPECT_TRUE(DeleteFile(entry_path.value().c_str()));
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} while (FindNextFile(search_handle, &find_data));
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EXPECT_EQ(ERROR_NO_MORE_FILES, GetLastError());
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EXPECT_TRUE(FindClose(search_handle));
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EXPECT_TRUE(RemoveDirectory(path.value().c_str()));
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}
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} // namespace test
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} // namespace crashpad
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