googleprojectzero-symboliclink-testing-tools/CreateDosDeviceSymlink/CreateDosDeviceSymlink.cpp

//  Copyright 2015 Google Inc. All Rights Reserved.
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//  http ://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.

#include "stdafx.h"
#include <CommonUtils.h>

static std::wstring MakeSymlink(LPCWSTR symlink)
{
	std::wstring ret = symlink;

	if (symlink[0] == '\\')
	{
		ret = L"Global\\GLOBALROOT" + ret;		
	}
	
	return ret;
}

int _tmain(int argc, _TCHAR* argv[])
{
	std::wstring symlink;
	std::wstring target;

	if (argc < 3)
	{
		printf("Usage: CreateDosDeviceSymlink [-d] symlink [target]\n");
		printf("Options:\n");
		printf("-d   : Delete the symlink\n");
		return 1;
	}	

	if (wcscmp(argv[1], L"-d") == 0)
	{	
		symlink = MakeSymlink(argv[2]);
		if (argc > 3)
		{
			target = argv[3];
		}

		if (DefineDosDeviceW(DDD_NO_BROADCAST_SYSTEM | DDD_RAW_TARGET_PATH | DDD_REMOVE_DEFINITION |
			DDD_EXACT_MATCH_ON_REMOVE, symlink.c_str(), target.size() > 0 ? target.c_str() : nullptr))
		{
			printf("Removed symlink\n");
		}
		else
		{
			printf("Error removing symlink: %ls\n", GetErrorMessage().c_str());
		}		
	}
	else
	{
		symlink = MakeSymlink(argv[1]);		
		target = argv[2];	

		if (DefineDosDevice(DDD_NO_BROADCAST_SYSTEM | DDD_RAW_TARGET_PATH, symlink.c_str(), target.c_str()))
		{
			printf("Created symlink\n");
		}
		else
		{
			printf("Error creating symlink: %ls\n", GetErrorMessage().c_str());
		}
	}

	return 0;
}