파일 시스템 변경에 대한 통보만 받기 위한다면

오후 2:13 2001-12-06
조경민
파일 시스템 변경에 대한 통보만 받기 위한다면
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Monitoring Changes in a Directory or Directory Tree
The following example monitors the directory tree starting at C:\ for directory name changes. It also monitors the C:\WINDOWS directory for file name changes.

The example uses the FindFirstChangeNotification function to create two notification handles and the WaitForMultipleObjects function to wait on the handles. Whenever a directory is created or deleted in the tree starting at C:\ , the example updates the entire directory tree. Whenever a file is created or deleted in the C:\WINDOWS directory, the example refreshes the WINDOWS directory. The FindNextChangeNotification function restarts the change notification each time the example processes a change.

DWORD dwWaitStatus;
HANDLE dwChangeHandles[2];

// Watch the C:\WINDOWS directory for file creation and
// deletion.

dwChangeHandles[0] = FindFirstChangeNotification(
    "C:\\WINDOWS",                 // directory to watch
    FALSE,                         // do not watch the subtree
    FILE_NOTIFY_CHANGE_FILE_NAME); // watch file name changes

if (dwChangeHandles[0] == INVALID_HANDLE_VALUE)
    ExitProcess(GetLastError());

// Watch the C:\ subtree for directory creation and
// deletion.

dwChangeHandles[1] = FindFirstChangeNotification(
    "C:\\",                        // directory to watch
    TRUE,                          // watch the subtree
    FILE_NOTIFY_CHANGE_DIR_NAME);  // watch dir. name changes

if (dwChangeHandles[1] == INVALID_HANDLE_VALUE)
    ExitProcess(GetLastError());

// Change notification is set. Now wait on both notification
// handles and refresh accordingly.

while (TRUE)
{

    // Wait for notification.

    dwWaitStatus = WaitForMultipleObjects(2, dwChangeHandles,
        FALSE, INFINITE);

    switch (dwWaitStatus)
    {
        case WAIT_OBJECT_0:

        // A file was created or deleted in C:\WINDOWS.
        // Refresh this directory and restart the
        // change notification. RefreshDirectory is an
        // application-defined function.

            RefreshDirectory("C:\\WINDOWS")
            if ( FindNextChangeNotification(
                    dwChangeHandles[0]) == FALSE )
                ExitProcess(GetLastError());
            break;

        case WAIT_OBJECT_0 + 1:

        // A directory was created or deleted in C:\.
        // Refresh the directory tree and restart the
        // change notification. RefreshTree is an
        // application-defined function.

            RefreshTree("C:\\");
            if (FindNextChangeNotification(
                    dwChangeHandles[1]) == FALSE)
                ExitProcess(GetLastError());
            break;

        default:
            ExitProcess(GetLastError());
    }
}