tdf#128100: add explicit service pack and build info to Windows version

Change-Id: I7cedb51f52315b006506bb37fb3562a48c7f0f3d
Reviewed-on: https://gerrit.libreoffice.org/80712
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

1 files changed, 39 insertions, 12 deletions

diff --git a/vcl/win/app/salinst.cxx b/vcl/win/app/salinst.cxx
index cc4fd65d7719..2c68ec354bf2 100644
--- a/vcl/win/app/salinst.cxx
+++ b/vcl/win/app/salinst.cxx
@@ -988,20 +988,25 @@ int WinSalInstance::WorkaroundExceptionHandlingInUSER32Lib(int, LPEXCEPTION_POIN
     return UnhandledExceptionFilter( pExceptionInfo );
 }
 
+typedef LONG NTSTATUS;
+typedef NTSTATUS(WINAPI* RtlGetVersion_t)(PRTL_OSVERSIONINFOW);
+constexpr NTSTATUS STATUS_SUCCESS = 0x00000000;
+
 OUString WinSalInstance::getOSVersion()
 {
+    OUStringBuffer aVer(50); // capacity for string like "Windows 6.1 Service Pack 1 build 7601"
+    aVer.append("Windows ");
     // GetVersion(Ex) and VersionHelpers (based on VerifyVersionInfo) API are
     // subject to manifest-based behavior since Windows 8.1, so give wrong results.
     // Another approach would be to use NetWkstaGetInfo, but that has some small
     // reported delays (some milliseconds), and might get slower in domains with
     // poor network connections.
     // So go with a solution described at https://msdn.microsoft.com/en-us/library/ms724429
-    HINSTANCE hLibrary = LoadLibraryW(L"kernel32.dll");
-    if (hLibrary != nullptr)
+    bool bHaveVerFromKernel32 = false;
+    if (HMODULE h_kernel32 = GetModuleHandleW(L"kernel32.dll"))
     {
         wchar_t szPath[MAX_PATH];
-        DWORD dwCount = GetModuleFileNameW(hLibrary, szPath, SAL_N_ELEMENTS(szPath));
-        FreeLibrary(hLibrary);
+        DWORD dwCount = GetModuleFileNameW(h_kernel32, szPath, SAL_N_ELEMENTS(szPath));
         if (dwCount != 0 && dwCount < SAL_N_ELEMENTS(szPath))
         {
             dwCount = GetFileVersionInfoSizeW(szPath, nullptr);
@@ -1014,19 +1019,41 @@ OUString WinSalInstance::getOSVersion()
                     UINT dwBlockSz = 0;
                     if (VerQueryValueW(ver.get(), L"\\", &pBlock, &dwBlockSz) != FALSE && dwBlockSz >= sizeof(VS_FIXEDFILEINFO))
                     {
-                        VS_FIXEDFILEINFO *vinfo = static_cast<VS_FIXEDFILEINFO *>(pBlock);
-                        OUStringBuffer aVer;
-                        aVer.append("Windows ");
-                        aVer.append(static_cast<sal_Int32>(HIWORD(vinfo->dwProductVersionMS)));
-                        aVer.append(".");
-                        aVer.append(static_cast<sal_Int32>(LOWORD(vinfo->dwProductVersionMS)));
-                        return aVer.makeStringAndClear();
+                        VS_FIXEDFILEINFO* vi1 = static_cast<VS_FIXEDFILEINFO*>(pBlock);
+                        aVer.append(OUString::number(HIWORD(vi1->dwProductVersionMS)) + "."
+                                    + OUString::number(LOWORD(vi1->dwProductVersionMS)));
+                        bHaveVerFromKernel32 = true;
                     }
                 }
             }
         }
     }
-    return "unknown";
+    // Now use RtlGetVersion (which is not subject to deprecation for GetVersion(Ex) API)
+    // to get build number and SP info
+    bool bHaveVerFromRtlGetVersion = false;
+    if (HMODULE h_ntdll = GetModuleHandleW(L"ntdll.dll"))
+    {
+        if (auto RtlGetVersion
+            = reinterpret_cast<RtlGetVersion_t>(GetProcAddress(h_ntdll, "RtlGetVersion")))
+        {
+            RTL_OSVERSIONINFOW vi2{}; // initialize with zeroes - a better alternative to memset
+            vi2.dwOSVersionInfoSize = sizeof(vi2);
+            if (STATUS_SUCCESS == RtlGetVersion(&vi2))
+            {
+                if (!bHaveVerFromKernel32) // we failed above; let's hope this would be useful
+                    aVer.append(OUString::number(vi2.dwMajorVersion) + "."
+                                + OUString::number(vi2.dwMinorVersion));
+                aVer.append(" ");
+                if (vi2.szCSDVersion[0])
+                    aVer.append(o3tl::toU(vi2.szCSDVersion)).append(" ");
+                aVer.append("Build " + OUString::number(vi2.dwBuildNumber));
+                bHaveVerFromRtlGetVersion = true;
+            }
+        }
+    }
+    if (!bHaveVerFromKernel32 && !bHaveVerFromRtlGetVersion)
+        aVer.append("unknown");
+    return aVer.makeStringAndClear();
 }
 
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