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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <shlwapi.h>
#include "base/file_util.h"
#include "base/logging.h"
#include "base/registry.h"
#include "chrome/installer/util/create_reg_key_work_item.h"
#include "chrome/installer/util/install_util.h"
#include "chrome/installer/util/logging_installer.h"
namespace {
// TODO: refactor this because it is only used once.
void UpOneDirectoryOrEmpty(std::wstring* dir) {
FilePath path = FilePath::FromWStringHack(*dir);
FilePath directory = path.DirName();
// If there is no separator, we will get back kCurrentDirectory.
// In this case, clear dir.
if (directory == path || directory.value() == FilePath::kCurrentDirectory)
dir->clear();
else
*dir = directory.ToWStringHack();
}
} // namespace
CreateRegKeyWorkItem::~CreateRegKeyWorkItem() {
}
CreateRegKeyWorkItem::CreateRegKeyWorkItem(HKEY predefined_root,
const std::wstring& path)
: predefined_root_(predefined_root),
path_(path),
key_created_(false) {
}
bool CreateRegKeyWorkItem::Do() {
if (!InitKeyList()) {
// Nothing needs to be done here.
LOG(INFO) << "no key to create";
return true;
}
RegKey key;
std::wstring key_path;
// To create keys, we iterate from back to front.
for (size_t i = key_list_.size(); i > 0; i--) {
DWORD disposition;
key_path.assign(key_list_[i - 1]);
if (key.CreateWithDisposition(predefined_root_, key_path.c_str(),
&disposition, KEY_READ)) {
if (disposition == REG_OPENED_EXISTING_KEY) {
if (key_created_) {
// This should not happen. Someone created a subkey under the key
// we just created?
LOG(ERROR) << key_path << " exists, this is not expected.";
return false;
}
LOG(INFO) << key_path << " exists";
// Remove the key path from list if it is already present.
key_list_.pop_back();
} else if (disposition == REG_CREATED_NEW_KEY) {
LOG(INFO) << "created " << key_path;
key_created_ = true;
} else {
LOG(ERROR) << "unkown disposition";
return false;
}
} else {
LOG(ERROR) << "Failed to create " << key_path;
return false;
}
}
return true;
}
void CreateRegKeyWorkItem::Rollback() {
if (!key_created_)
return;
std::wstring key_path;
// To delete keys, we iterate from front to back.
std::vector<std::wstring>::iterator itr;
for (itr = key_list_.begin(); itr != key_list_.end(); ++itr) {
key_path.assign(*itr);
if (SHDeleteEmptyKey(predefined_root_, key_path.c_str()) ==
ERROR_SUCCESS) {
LOG(INFO) << "rollback: delete " << key_path;
} else {
LOG(INFO) << "rollback: can not delete " << key_path;
// The key might have been deleted, but we don't reliably know what
// error code(s) are returned in this case. So we just keep tring delete
// the rest.
}
}
key_created_ = false;
key_list_.clear();
return;
}
bool CreateRegKeyWorkItem::InitKeyList() {
if (path_.empty())
return false;
std::wstring key_path(path_);
do {
key_list_.push_back(key_path);
// This is pure string operation so it does not matter whether the
// path is file path or registry path.
UpOneDirectoryOrEmpty(&key_path);
} while (!key_path.empty());
return true;
}
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