Method ExtractUpdaterAndRun

src/Setup/UpdateRunner.cpp:150–298

}

int CUpdateRunner::ExtractUpdaterAndRun(wchar_t* lpCommandLine, bool useFallbackDir)
{
	PROCESS_INFORMATION pi = { 0 };
	STARTUPINFO si = { 0 };
	CResource zipResource;
	wchar_t targetDir[MAX_PATH] = { 0 };
	wchar_t logFile[MAX_PATH];

	std::vector<CString> to_delete;

	wchar_t* envSquirrelTemp = _wgetenv(L"SQUIRREL_TEMP");
	if (envSquirrelTemp &&
		DirectoryExists(envSquirrelTemp) &&
		DirectoryIsWritable(envSquirrelTemp) &&
		!PathIsUNCW(envSquirrelTemp)) {
		_swprintf_c(targetDir, _countof(targetDir), L"%s", envSquirrelTemp);
		goto gotADir;
	}

	if (!useFallbackDir) {
		SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA, NULL, SHGFP_TYPE_CURRENT, targetDir);
		goto gotADir;
	}

	wchar_t username[512];
	wchar_t appDataDir[MAX_PATH];
	ULONG unameSize = _countof(username);

	SHGetFolderPath(NULL, CSIDL_COMMON_APPDATA, NULL, SHGFP_TYPE_CURRENT, appDataDir);
	GetUserName(username, &unameSize);

	_swprintf_c(targetDir, _countof(targetDir), L"%s\\%s", appDataDir, username);

	if (!CreateDirectory(targetDir, NULL) && GetLastError() != ERROR_ALREADY_EXISTS) {
		wchar_t err[4096];
		_swprintf_c(err, _countof(err), L"Unable to write to %s - IT policies may be restricting access to this folder", targetDir);
		DisplayErrorMessage(CString(err), NULL);

		return -1;
	}

gotADir:

	wcscat_s(targetDir, _countof(targetDir), L"\\SquirrelTemp");

	if (!CreateDirectory(targetDir, NULL) && GetLastError() != ERROR_ALREADY_EXISTS) {
		wchar_t err[4096];
		_swprintf_c(err, _countof(err), L"Unable to write to %s - IT policies may be restricting access to this folder", targetDir);

		if (useFallbackDir) {
			DisplayErrorMessage(CString(err), NULL);
		}

		goto failedExtract;
	}

	swprintf_s(logFile, L"%s\\SquirrelSetup.log", targetDir);