dll: FspVersion

build/VStudio/testing/winfsp-tests.vcxproj

@@ -202,6 +202,7 @@
     <ClCompile Include="..\..\..\tst\winfsp-tests\security-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\stream-tests.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\timeout-test.c" />
+    <ClCompile Include="..\..\..\tst\winfsp-tests\version-test.c" />
     <ClCompile Include="..\..\..\tst\winfsp-tests\winfsp-tests.c" />
   </ItemGroup>
   <ItemGroup>

build/VStudio/testing/winfsp-tests.vcxproj.filters

@@ -82,6 +82,9 @@
     <ClCompile Include="..\..\..\tst\winfsp-tests\exec-test.c">
       <Filter>Source</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\tst\winfsp-tests\version-test.c">
+      <Filter>Source</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\..\..\ext\tlib\testsuite.h">

inc/winfsp/winfsp.h

@@ -1627,6 +1627,7 @@ FSP_API NTSTATUS FspCallNamedPipeSecurely(PWSTR PipeName,
     PVOID InBuffer, ULONG InBufferSize, PVOID OutBuffer, ULONG OutBufferSize,
     PULONG PBytesTransferred, ULONG Timeout,
     PSID Sid);
+FSP_API NTSTATUS FspVersion(PUINT32 PVersion);
 
 /*
  * Delay load

src/dll/util.c

@@ -163,3 +163,47 @@ exit:
 
     return Result;
 }
+
+FSP_API NTSTATUS FspVersion(PUINT32 PVersion)
+{
+    static UINT32 Version;
+
+    if (0 == Version)
+    {
+        /*
+         * This check is not thread-safe, but that should be ok.
+         * Two threads competing to read the version will read
+         * the same value from the Version resource.
+         */
+        extern HINSTANCE DllInstance;
+        WCHAR ModuleFileName[MAX_PATH];
+        PVOID VersionInfo;
+        DWORD Size;
+        VS_FIXEDFILEINFO *FixedFileInfo = 0;
+
+        if (0 != GetModuleFileNameW(DllInstance, ModuleFileName, MAX_PATH))
+        {
+            Size = GetFileVersionInfoSizeW(ModuleFileName, &Size/*dummy*/);
+            if (0 < Size)
+            {
+                VersionInfo = MemAlloc(Size);
+                if (0 != VersionInfo &&
+                    GetFileVersionInfoW(ModuleFileName, 0, Size, VersionInfo) &&
+                    VerQueryValueW(VersionInfo, L"\\", &FixedFileInfo, &Size))
+                {
+                    /* 32-bit store should be atomic! */
+                    Version = FixedFileInfo->dwFileVersionMS;
+                }
+
+                MemFree(VersionInfo);
+            }
+        }
+
+        if (0 == FixedFileInfo)
+            return STATUS_UNSUCCESSFUL;
+    }
+
+    *PVersion = Version;
+
+    return STATUS_SUCCESS;
+}

tst/winfsp-tests/version-test.c

@@ -0,0 +1,44 @@
+/**
+ * @file version-test.c
+ *
+ * @copyright 2015-2017 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this file in
+ * accordance with the commercial license agreement provided with the
+ * software.
+ */
+
+#include <winfsp/winfsp.h>
+#include <tlib/testsuite.h>
+
+#include "winfsp-tests.h"
+
+static void version_test(void)
+{
+    /* this is not a real test! */
+
+    UINT32 Version1, Version2;
+    NTSTATUS Result;
+
+    Result = FspVersion(&Version1);
+    ASSERT(NT_SUCCESS(Result));
+
+    Result = FspVersion(&Version2);
+    ASSERT(NT_SUCCESS(Result));
+
+    ASSERT(Version1 == Version2);
+
+    FspDebugLog(__FUNCTION__ ": FspVersion=%d.%d\n", HIWORD(Version1), LOWORD(Version1));
+}
+
+void version_tests(void)
+{
+    TEST(version_test);
+}

tst/winfsp-tests/winfsp-tests.c

@@ -184,6 +184,7 @@ int main(int argc, char *argv[])
     TESTSUITE(eventlog_tests);
     TESTSUITE(path_tests);
     TESTSUITE(dirbuf_tests);
+    TESTSUITE(version_tests);
     TESTSUITE(mount_tests);
     TESTSUITE(timeout_tests);
     TESTSUITE(memfs_tests);