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// @file winutil.cpp : Windows related utility functions
//
//
/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
//
#pragma once
#if defined(_WIN32)
#include "text.h"
#include <atlbase.h>
#include <atlstr.h>
#include <boost/optional.hpp>
#include <sstream>
#include <string>
#include <windows.h>
#include <mongo/base/status_with.h>
namespace mongo {
namespace windows {
inline std::string GetErrMsg(DWORD err) {
LPTSTR errMsg;
::FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
err,
0,
(LPTSTR)&errMsg,
0,
NULL);
std::string errMsgStr = toUtf8String(errMsg);
::LocalFree(errMsg);
// FormatMessage() appends a newline to the end of error messages, we trim it because std::endl
// flushes the buffer.
errMsgStr = errMsgStr.erase(errMsgStr.length() - 2);
std::ostringstream output;
output << errMsgStr << " (" << err << ")";
return output.str();
}
/**
* Retrieve a DWORD value from the Local Machine Windows Registry for element:
* group\key
* e.g. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\KeepAliveTime
*
* On success, returns:
* boost::none if the key does not exist.
* The value read from the registry.
*
* On failure, returns:
* ErrorCodes::InternalError - Unable to access the registry group.
* ErrorCodes::TypeMismatch - Key exists, but is of the wrong type.
*/
StatusWith<boost::optional<DWORD>> getDWORDRegistryKey(const CString& group, const CString& key);
} // namespace windows
} // namespace mongo
#endif
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