shell_path.hpp

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// Copyright (c) 2006, 2007 Julio M. Merino Vidal
// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
// Copyright (c) 2009 Boris Schaeling
// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include <filesystem>
 
#include <boost/process/config.hpp>
#include <boost/system/error_code.hpp>
 
#include <Windows.h>
 
namespace boost::process::windows
{
 
    inline std::filesystem::path
    shell_path()
    {
        TCHAR sysdir[MAX_PATH];
        UINT size = ::GetSystemDirectory(sysdir, sizeof(sysdir));
        if (!size)
        {
            BOOST_PROCESS_THROW_LAST_SYSTEM_ERROR("GetSystemDirectory() failed");
        }
        std::filesystem::path p = sysdir;
        return p / "cmd.exe";
    }
 
    inline std::filesystem::path
    shell_path(boost::system::error_code& ec)
    {
        TCHAR sysdir[MAX_PATH];
        UINT size = ::GetSystemDirectory(sysdir, sizeof(sysdir));
        std::filesystem::path p;
        if (!size)
        {
            BOOST_PROCESS_RETURN_LAST_SYSTEM_ERROR(ec);
        }
        else
        {
            ec.clear();
            p = sysdir;
            p /= "cmd.exe";
        }
        return p;
    }
 
} // namespace boost::process::windows