--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.jpackage/windows/native/libjpackage/WinSysInfo.cpp	Mon Jun 17 15:38:04 2019 -0400
@@ -0,0 +1,174 @@
+/*
+ * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "WinSysInfo.h"
+#include "FileUtils.h"
+#include "WinErrorHandling.h"
+
+namespace SysInfo {
+
+tstring getTempDir() {
+    std::vector<TCHAR> buffer(MAX_PATH);
+    DWORD res = GetTempPath(static_cast<DWORD>(buffer.size()), buffer.data());
+    if (res > buffer.size()) {
+        buffer.resize(res);
+        GetTempPath(static_cast<DWORD>(buffer.size()), buffer.data());
+    }
+    return FileUtils::removeTrailingSlash(buffer.data());
+}
+
+namespace {
+
+template <class Func>
+tstring getSystemDirImpl(Func func, const std::string& label) {
+    std::vector<TCHAR> buffer(MAX_PATH);
+    for (int i=0; i<2; i++) {
+        DWORD res = func(buffer.data(), static_cast<DWORD>(buffer.size()));
+        if (!res) {
+            JP_THROW(SysError(label + " failed", func));
+        }
+        if (res < buffer.size()) {
+            return FileUtils::removeTrailingSlash(buffer.data());
+        }
+        buffer.resize(res + 1);
+    }
+    JP_THROW("Unexpected reply from" + label);
+}
+
+} // namespace
+
+tstring getSystem32Dir() {
+    return getSystemDirImpl(GetSystemDirectory, "GetSystemDirectory");
+}
+
+tstring getWIPath() {
+    return FileUtils::mkpath() << getSystem32Dir() << _T("msiexec.exe");
+}
+
+namespace {
+
+tstring getModulePath(HMODULE h)
+{
+    std::vector<TCHAR> buf(MAX_PATH);
+    DWORD len = 0;
+    while (true) {
+        len = GetModuleFileName(h, buf.data(), (DWORD)buf.size());
+        if (len < buf.size()) {
+            break;
+        }
+        // buffer is too small, increase it
+        buf.resize(buf.size() * 2);
+    }
+
+    if (len == 0) {
+        // error occured
+        JP_THROW(SysError("GetModuleFileName failed", GetModuleFileName));
+    }
+    return tstring(buf.begin(), buf.begin() + len);
+}
+
+} // namespace
+
+tstring getProcessModulePath() {
+    return getModulePath(NULL);
+}
+
+HMODULE getCurrentModuleHandle()
+{
+    // get module handle for the address of this function
+    LPCWSTR address = reinterpret_cast<LPCWSTR>(getCurrentModuleHandle);
+    HMODULE hmodule = NULL;
+    if (!GetModuleHandleExW(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
+                            address, &hmodule))
+    {
+        JP_THROW(SysError(tstrings::any() << "GetModuleHandleExW failed", GetModuleHandleExW));
+    }
+    return hmodule;
+}
+
+tstring getCurrentModulePath()
+{
+    return getModulePath(getCurrentModuleHandle());
+}
+
+namespace {
+
+tstring getEnvVariableImpl(const tstring& name, bool* errorOccured=0) {
+    std::vector<TCHAR> buf(10);
+    SetLastError(ERROR_SUCCESS);
+    const DWORD size = GetEnvironmentVariable(name.c_str(), buf.data(),
+                                                            DWORD(buf.size()));
+    if (GetLastError() == ERROR_ENVVAR_NOT_FOUND) {
+        if (errorOccured) {
+            *errorOccured = true;
+            return tstring();
+        }
+        JP_THROW(SysError(tstrings::any() << "GetEnvironmentVariable("
+            << name << ") failed. Variable not set", GetEnvironmentVariable));
+    }
+
+    if (size > buf.size()) {
+        buf.resize(size);
+        GetEnvironmentVariable(name.c_str(), buf.data(), DWORD(buf.size()));
+        if (GetLastError() != ERROR_SUCCESS) {
+            if (errorOccured) {
+                *errorOccured = true;
+                return tstring();
+            }
+            JP_THROW(SysError(tstrings::any() << "GetEnvironmentVariable("
+                            << name << ") failed", GetEnvironmentVariable));
+        }
+    }
+
+    if (errorOccured) {
+        *errorOccured = false;
+    }
+    return tstring(buf.data());
+}
+
+} // namespace
+
+tstring getEnvVariable(const tstring& name) {
+    return getEnvVariableImpl(name);
+}
+
+tstring getEnvVariable(const std::nothrow_t&, const tstring& name,
+                                                    const tstring& defValue) {
+    bool errorOccured = false;
+    const tstring reply = getEnvVariableImpl(name, &errorOccured);
+    if (errorOccured) {
+        return defValue;
+    }
+    return reply;
+}
+
+bool isEnvVariableSet(const tstring& name) {
+    TCHAR unused[1];
+    SetLastError(ERROR_SUCCESS);
+    GetEnvironmentVariable(name.c_str(), unused, _countof(unused));
+    return GetLastError() != ERROR_ENVVAR_NOT_FOUND;
+}
+
+} // end of namespace SysInfo