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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 "chrome/installer/util/delete_reg_key_work_item.h"
#include <shlwapi.h>
#include "base/logging.h"
#include "base/win/registry.h"
using base::win::RegKey;
DeleteRegKeyWorkItem::~DeleteRegKeyWorkItem() {
}
DeleteRegKeyWorkItem::DeleteRegKeyWorkItem(HKEY predefined_root,
const std::wstring& path)
: predefined_root_(predefined_root),
path_(path) {
DCHECK(predefined_root);
// It's a safe bet that we don't want to delete one of the root trees.
DCHECK(!path.empty());
}
bool DeleteRegKeyWorkItem::Do() {
if (path_.empty())
return false;
RegistryKeyBackup backup;
// Only try to make a backup if we're not configured to ignore failures.
if (!ignore_failure_) {
if (!backup.Initialize(predefined_root_, path_.c_str())) {
LOG(ERROR) << "Failed to backup destination for registry key copy.";
return false;
}
}
// Delete the key.
LONG result = SHDeleteKey(predefined_root_, path_.c_str());
if (result != ERROR_SUCCESS && result != ERROR_FILE_NOT_FOUND) {
LOG(ERROR) << "Failed to delete key at " << path_ << ", result: "
<< result;
return ignore_failure_;
}
// We've succeeded, so remember any backup we may have made.
backup_.swap(backup);
return true;
}
void DeleteRegKeyWorkItem::Rollback() {
if (ignore_failure_)
return;
// Delete anything in the key before restoring the backup in case someone else
// put new data in the key after Do().
LONG result = SHDeleteKey(predefined_root_, path_.c_str());
if (result != ERROR_SUCCESS && result != ERROR_FILE_NOT_FOUND) {
LOG(ERROR) << "Failed to delete key at " << path_ << " in rollback, "
"result: " << result;
}
// 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()))
LOG(ERROR) << "Failed to restore key in rollback.";
}
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