[host][windows]: change platform version from build version to display version

host/host_test.go

@@ -17,6 +17,18 @@ func skipIfNotImplementedErr(t *testing.T, err error) {
 	}
 }
 
+func TestHostID(t *testing.T) {
+	v, err := HostID()
+	skipIfNotImplementedErr(t, err)
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+	if v == "" {
+		t.Errorf("Could not get host id %v", v)
+	}
+	t.Log(v)
+}
+
 func TestInfo(t *testing.T) {
 	v, err := Info()
 	skipIfNotImplementedErr(t, err)

host/host_windows.go

@@ -136,6 +136,14 @@ func BootTimeWithContext(ctx context.Context) (uint64, error) {
 }
 
 func PlatformInformationWithContext(ctx context.Context) (platform string, family string, version string, err error) {
+	platform, family, _, displayVersion, err := platformInformation(ctx)
+	if err != nil {
+		return "", "", "", err
+	}
+	return platform, family, displayVersion, nil
+}
+
+func platformInformation(ctx context.Context) (platform, family, version, displayVersion string, err error) {
 	// GetVersionEx lies on Windows 8.1 and returns as Windows 8 if we don't declare compatibility in manifest
 	// RtlGetVersion bypasses this lying layer and returns the true Windows version
 	// https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/content/wdm/nf-wdm-rtlgetversion
@@ -199,6 +207,14 @@ func PlatformInformationWithContext(ctx context.Context) (platform string, famil
 		copy((*[4]byte)(unsafe.Pointer(&UBR))[:], regBuf)
 	}
 
+	// Get DisplayVersion(ex: 23H2) as platformVersion
+	err = windows.RegQueryValueEx(h, windows.StringToUTF16Ptr(`DisplayVersion`), nil, &valType, nil, &bufLen)
+	if err == nil {
+		regBuf := make([]uint16, bufLen/2+1)
+		err = windows.RegQueryValueEx(h, windows.StringToUTF16Ptr(`DisplayVersion`), nil, &valType, (*byte)(unsafe.Pointer(&regBuf[0])), &bufLen)
+		displayVersion = windows.UTF16ToString(regBuf[:])
+	}
+
 	// PlatformFamily
 	switch osInfo.wProductType {
 	case 1:
@@ -214,7 +230,7 @@ func PlatformInformationWithContext(ctx context.Context) (platform string, famil
 		osInfo.dwMajorVersion, osInfo.dwMinorVersion, osInfo.dwBuildNumber, UBR,
 		osInfo.dwBuildNumber, UBR)
 
-	return platform, family, version, nil
+	return platform, family, version, displayVersion, nil
 }
 
 func UsersWithContext(ctx context.Context) ([]UserStat, error) {
@@ -228,7 +244,7 @@ func VirtualizationWithContext(ctx context.Context) (string, string, error) {
 }
 
 func KernelVersionWithContext(ctx context.Context) (string, error) {
-	_, _, version, err := PlatformInformationWithContext(ctx)
+	_, _, version, _, err := platformInformation(ctx)
 	return version, err
 }