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// Copyright 2010 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/installer/util/delete_reg_key_work_item.h"
#include "base/check.h"
#include "base/logging.h"
#include "base/win/registry.h"
#include "base/win/shlwapi.h"
#include "chrome/installer/util/registry_util.h"
using base::win::RegKey;
DeleteRegKeyWorkItem::~DeleteRegKeyWorkItem() = default;
DeleteRegKeyWorkItem::DeleteRegKeyWorkItem(HKEY predefined_root,
const std::wstring& path,
REGSAM wow64_access)
: predefined_root_(predefined_root),
path_(path),
wow64_access_(wow64_access) {
DCHECK(predefined_root);
// It's a safe bet that we don't want to delete one of the root trees.
DCHECK(!path.empty());
DCHECK(wow64_access == 0 || wow64_access == KEY_WOW64_32KEY ||
wow64_access == KEY_WOW64_64KEY);
}
bool DeleteRegKeyWorkItem::DoImpl() {
DCHECK(!backup_initialized_);
if (path_.empty())
return false;
// Only try to make a backup if rollback is enabled.
if (rollback_enabled()) {
if (!backup_.Initialize(predefined_root_, path_.c_str(), wow64_access_)) {
LOG(ERROR) << "Failed to backup destination for registry key copy.";
return false;
}
backup_initialized_ = true;
}
// Delete the key.
if (!installer::DeleteRegistryKey(predefined_root_, path_.c_str(),
wow64_access_)) {
return false;
}
return true;
}
void DeleteRegKeyWorkItem::RollbackImpl() {
if (!backup_initialized_)
return;
// Delete anything in the key before restoring the backup in case someone else
// put new data in the key after Do().
installer::DeleteRegistryKey(predefined_root_, path_.c_str(), wow64_access_);
// Restore the old contents. The restoration takes on its default security
// attributes; any custom attributes are lost.
if (!backup_.WriteTo(predefined_root_, path_.c_str(), wow64_access_))
LOG(ERROR) << "Failed to restore key in rollback.";
}
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