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|
include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <tchar.h>
void RefreshDirectory(LPTSTR);
void RefreshTree(LPTSTR);
void WatchDirectory(LPTSTR lpDir)
{
DWORD dwWaitStatus;
HANDLE dwChangeHandles[2];
TCHAR lpDrive[4];
TCHAR lpFile[_MAX_FNAME];
TCHAR lpExt[_MAX_EXT];
_tsplitpath(lpDir, lpDrive, NULL, lpFile, lpExt);
lpDrive[2] = (TCHAR)'\\';
lpDrive[3] = (TCHAR)'\0';
// Watch the directory for file creation and deletion.
dwChangeHandles[0] = FindFirstChangeNotification(
lpDir, // directory to watch
FALSE, // do not watch subtree
FILE_NOTIFY_CHANGE_FILE_NAME); // watch file name changes
if (dwChangeHandles[0] == INVALID_HANDLE_VALUE)
ExitProcess(GetLastError());
// Watch the subtree for directory creation and deletion.
dwChangeHandles[1] = FindFirstChangeNotification(
lpDrive, // 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 the directory.
// Refresh this directory and restart the notification.
RefreshDirectory(lpDir);
if ( FindNextChangeNotification(
dwChangeHandles[0]) == FALSE )
ExitProcess(GetLastError());
break;
case WAIT_OBJECT_0 + 1:
// A directory was created or deleted in the subtree.
// Refresh the tree and restart the notification.
RefreshTree(lpDrive);
if (FindNextChangeNotification(
dwChangeHandles[1]) == FALSE)
ExitProcess(GetLastError());
break;
default:
ExitProcess(GetLastError());
}
}
}
void RefreshDirectory(LPTSTR lpDir)
{
_tprintf(TEXT("Refresh the directory (%s).\n"), lpDir);
}
void RefreshTree(LPTSTR lpDrive)
{
_tprintf(TEXT("Refresh the directory tree (%s).\n"), lpDrive);
} |
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