private PInvokeWin32.READ_USN_JOURNAL_DATA SetupInputData4JournalRead(string volume, uint reason) { IntPtr pMonitorVolume = MFTSearcher.GetVolumeJournalHandle(volume); uint bytesReturned = 0; PInvokeWin32.USN_JOURNAL_DATA ujd = new PInvokeWin32.USN_JOURNAL_DATA(); MFTSearcher.QueryUSNJournal(pMonitorVolume, out ujd, out bytesReturned); // 构建输入参数 PInvokeWin32.READ_USN_JOURNAL_DATA rujd = new PInvokeWin32.READ_USN_JOURNAL_DATA(); rujd.StartUsn = ujd.NextUsn; rujd.ReasonMask = reason; rujd.ReturnOnlyOnClose = 1; rujd.Timeout = 0; rujd.BytesToWaitFor = 1; rujd.UsnJournalID = ujd.UsnJournalID; return(rujd); }
private void MonitorThread(string volume, MFTSearcherCache db) { IntPtr pbuffer = Marshal.AllocHGlobal(0x1000); PInvokeWin32.READ_USN_JOURNAL_DATA rujd = SetupInputData4JournalRead(volume, 0xFFFFFFFF); UInt32 cbRead; IntPtr prujd; while (true) { prujd = Marshal.AllocHGlobal(Marshal.SizeOf(rujd)); PInvokeWin32.ZeroMemory(prujd, Marshal.SizeOf(rujd)); Marshal.StructureToPtr(rujd, prujd, true); IntPtr pVolume = MFTSearcher.GetVolumeJournalHandle(volume); bool fok = PInvokeWin32.DeviceIoControl(pVolume, PInvokeWin32.FSCTL_READ_USN_JOURNAL, prujd, Marshal.SizeOf(typeof(PInvokeWin32.READ_USN_JOURNAL_DATA)), pbuffer, 0x1000, out cbRead, IntPtr.Zero); IntPtr pRealData = new IntPtr(pbuffer.ToInt32() + Marshal.SizeOf(typeof(Int64))); uint offset = 0; if (fok) { while (offset + Marshal.SizeOf(typeof(Int64)) < cbRead) { PInvokeWin32.USN_RECORD usn = new PInvokeWin32.USN_RECORD(new IntPtr(pRealData.ToInt32() + (int)offset)); ProcessUSN(usn, volume, db); offset += usn.RecordLength; } } Marshal.FreeHGlobal(prujd); rujd.StartUsn = Marshal.ReadInt64(pbuffer); } }