[C++]使用ReadDirectoryChangesW API監控檔案系統的改變

hDirectoryHandle = ::CreateFileA( file, FILE_LIST_DIRECTORY,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED, NULL);

if(hDirectoryHandle == INVALID_HANDLE_VALUE) return;

memset(buffer, 0, nBufferSize);

if(!::ReadDirectoryChangesW( hDirectoryHandle, buffer, nBufferSize, bIncludeSubdirectories,
FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_CREATION | FILE_NOTIFY_CHANGE_FILE_NAME,
&dwBytes,
NULL,
NULL) || GetLastError() == ERROR_INVALID_HANDLE) { break; }

if(!dwBytes) { printf(“Buffer overflow~~ “); }

do { switch (record->Action) { case FILE_ACTION_ADDED: printf(“FILE_ACTION_ADDED:”); break; case FILE_ACTION_REMOVED: printf(“FILE_ACTION_REMOVED:”); break; case FILE_ACTION_MODIFIED: printf(“FILE_ACTION_MODIFIED:”); break; case FILE_ACTION_RENAMED_OLD_NAME: printf(“FILE_ACTION_RENAMED_OLD_NAME:”); break;

case FILE_ACTION_RENAMED_NEW_NAME:
	printf("FILE_ACTION_RENAMED_NEW_NAME:");
	break;

default:
	break;
}		

char fileBuffer[512];

WideCharToMultiByte(CP_ACP, 0, record->FileName, record->FileNameLength, fileBuffer, record->FileNameLength, NULL, NULL);  
printf(fileBuffer);
printf("

“);

cbOffset = record->NextEntryOffset;
record = (PFILE_NOTIFY_INFORMATION)((LPBYTE) record + cbOffset);

}while(cbOffset);

#include “stdafx.h” #include “Windows.h”

void MonitorDir(char* file, bool bIncludeSubdirectories = false) { int nBufferSize = 1024; char* buffer = new char[nBufferSize]; HANDLE hDirectoryHandle = NULL;

hDirectoryHandle = ::CreateFileA(
	file,					
	FILE_LIST_DIRECTORY,                
	FILE_SHARE_READ						
	| FILE_SHARE_WRITE
	| FILE_SHARE_DELETE,
	NULL,                               
	OPEN_EXISTING,                      
	FILE_FLAG_BACKUP_SEMANTICS			
	| FILE_FLAG_OVERLAPPED,
	NULL);  

if(hDirectoryHandle == INVALID_HANDLE_VALUE)
	return;

while(1)
{
	DWORD dwBytes = 0;

	memset(buffer, 0, nBufferSize);

	if(!::ReadDirectoryChangesW(
		hDirectoryHandle,						
		buffer,								
		nBufferSize,		
		bIncludeSubdirectories,             
		FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_CREATION | FILE_NOTIFY_CHANGE_FILE_NAME,     
		&dwBytes,                         
		NULL,                    
		NULL) || GetLastError() == ERROR_INVALID_HANDLE)
	{
		break;
	}

	if(!dwBytes)
	{
		printf("Buffer overflow~~

“); }

	PFILE_NOTIFY_INFORMATION record = (PFILE_NOTIFY_INFORMATION)buffer;
	DWORD cbOffset = 0;

	do
	{	
		switch (record->Action)
		{
		case FILE_ACTION_ADDED:	
			printf("FILE_ACTION_ADDED:");
			break;
		case FILE_ACTION_REMOVED:
			printf("FILE_ACTION_REMOVED:");
			break;
		case FILE_ACTION_MODIFIED:
			printf("FILE_ACTION_MODIFIED:");
			break;
		case FILE_ACTION_RENAMED_OLD_NAME:
			printf("FILE_ACTION_RENAMED_OLD_NAME:");				
			break;

		case FILE_ACTION_RENAMED_NEW_NAME:
			printf("FILE_ACTION_RENAMED_NEW_NAME:");
			break;

		default:
			break;
		}		

		char fileBuffer[512];

		WideCharToMultiByte(CP_ACP, 0, record->FileName, record->FileNameLength, fileBuffer, record->FileNameLength, NULL, NULL);  
		printf(fileBuffer);
		printf("

“);

		cbOffset = record->NextEntryOffset;
		record = (PFILE_NOTIFY_INFORMATION)((LPBYTE) record + cbOffset);
	}while(cbOffset);		
}

delete buffer;

if(hDirectoryHandle)
	CloseHandle(hDirectoryHandle);

}

int _tmain(int argc, _TCHAR* argv[]) { MonitorDir(“C:\Users\larry\Desktop\新增資料夾”); return 0; }

• C++