Method StartProcess

util/system/shellcommand.cpp:487–599

#if defined(_win_)
void TShellCommand::TImpl::StartProcess(TShellCommand::TImpl::TPipes& pipes) {
    // Setup STARTUPINFO to redirect handles.
    STARTUPINFOW startup_info;
    ZeroMemory(&startup_info, sizeof(startup_info));
    startup_info.cb = sizeof(startup_info);
    startup_info.dwFlags = STARTF_USESTDHANDLES;

    if (Options_.OutputMode != TShellCommandOptions::HANDLE_INHERIT) {
        if (!SetHandleInformation(pipes.OutputPipeFd[1], HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT)) {
            ythrow TSystemError() << "cannot set handle info";
        }
    }
    if (Options_.ErrorMode != TShellCommandOptions::HANDLE_INHERIT) {
        if (!SetHandleInformation(pipes.ErrorPipeFd[1], HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT)) {
            ythrow TSystemError() << "cannot set handle info";
        }
    }
    if (InputMode != TShellCommandOptions::HANDLE_INHERIT) {
        if (!SetHandleInformation(pipes.InputPipeFd[0], HANDLE_FLAG_INHERIT, HANDLE_FLAG_INHERIT)) {
            ythrow TSystemError() << "cannot set handle info";
        }
    }

    // A sockets do not work as std streams for some reason
    if (Options_.OutputMode != TShellCommandOptions::HANDLE_INHERIT) {
        startup_info.hStdOutput = pipes.OutputPipeFd[1];
    } else {
        startup_info.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
    }
    if (Options_.ErrorMode != TShellCommandOptions::HANDLE_INHERIT) {
        startup_info.hStdError = pipes.ErrorPipeFd[1];
    } else {
        startup_info.hStdError = GetStdHandle(STD_ERROR_HANDLE);
    }
    if (InputMode != TShellCommandOptions::HANDLE_INHERIT) {
        startup_info.hStdInput = pipes.InputPipeFd[0];
    } else {
        // Don't leave hStdInput unfilled, otherwise any attempt to retrieve the operating-system file handle
        // that is associated with the specified file descriptor will led to errors.
        startup_info.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
    }

    PROCESS_INFORMATION process_info;
    // TString cmd = "cmd /U" + TUtf16String can be used to read unicode messages from cmd
    // /A - ansi charset /Q - echo off, /C - command, /Q - special quotes
    TString qcmd = GetQuotedCommand();
    TString cmd = Options_.UseShell ? "cmd /A /Q /S /C \"" + qcmd + "\"" : qcmd;
    // winapi can modify command text, copy it

    Y_ENSURE_EX(cmd.size() < MAX_COMMAND_LINE, yexception() << "Command is too long (length=" << cmd.size() << ")");
    TTempArray<wchar_t> cmdcopy(MAX_COMMAND_LINE);
    Copy(cmd.data(), cmd.data() + cmd.size(), cmdcopy.Data());
    *(cmdcopy.Data() + cmd.size()) = 0;

    const wchar_t* cwd = NULL;
    std::wstring cwdBuff;
    if (WorkDir.size()) {
        cwdBuff = GetWString(WorkDir.data());