int LaunchSubProcess( const AString & args )
{
// try to make a copy of our exe
AStackString<> exeName;
Env::GetExePath( exeName );
AStackString<> exeNameCopy( exeName );
exeNameCopy += ".copy";
Timer t;
while ( FileIO::FileCopy( exeName.Get(), exeNameCopy.Get() ) == false )
{
if ( t.GetElapsed() > 5.0f )
{
AStackString<> msg;
msg.Format( "Failed to make sub-process copy - error: %u (0x%x)\n\nSrc: %s\nDst: %s\n", Env::GetLastErr(), Env::GetLastErr(), exeName.Get(), exeNameCopy.Get() );
ShowMsgBox( msg.Get() );
return -2;
}
Thread::Sleep( 100 );
}
AStackString<> argsCopy( args );
argsCopy += " -subprocess";
// allow subprocess to access the mutex
g_OneProcessMutex.Unlock();
Process p;
#if defined( __WINDOWS__ )
p.DisableHandleRedirection(); // TODO:MAC TODO:LINUX is this needed?
#endif
p.Spawn( exeNameCopy.Get(), argsCopy.Get(), nullptr, nullptr );
p.Detach();
return 0;
}
bool ChildProcess::Run(bool showCommand, std::wstring args)
{
UIETWASSERT(!hProcess_);
if (showCommand)
outputPrintf(L"%s\n", args.c_str());
SECURITY_ATTRIBUTES security = { sizeof(security), 0, TRUE };
hStdOutput_ = CreateFile(kPipeName, GENERIC_WRITE, 0, &security,
OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, INVALID_HANDLE_VALUE);
if (hStdOutput_ == INVALID_HANDLE_VALUE)
return false;
if (!DuplicateHandle(GetCurrentProcess(), hStdOutput_, GetCurrentProcess(),
&hStdError_, 0, TRUE, DUPLICATE_SAME_ACCESS))
return false;
STARTUPINFO startupInfo = {};
startupInfo.hStdOutput = hStdOutput_;
startupInfo.hStdError = hStdError_;
startupInfo.hStdInput = INVALID_HANDLE_VALUE;
startupInfo.dwFlags = STARTF_USESTDHANDLES;
PROCESS_INFORMATION processInfo = {};
DWORD flags = CREATE_NO_WINDOW;
// Wacky CreateProcess rules say args has to be writable!
std::vector<wchar_t> argsCopy(args.size() + 1);
wcscpy_s(&argsCopy[0], argsCopy.size(), args.c_str());
BOOL success = CreateProcess(exePath_.c_str(), &argsCopy[0], NULL, NULL,
TRUE, flags, NULL, NULL, &startupInfo, &processInfo);
if (success)
{
CloseHandle(processInfo.hThread);
hProcess_ = processInfo.hProcess;
return true;
}
else
{
outputPrintf(L"Error %d starting %s, %s\n", (int)GetLastError(), exePath_.c_str(), args.c_str());
}
return false;
}