Process32Next失敗，並ERROR_INSUFFICIENT_BUFFER（Windows 7）中

我試圖讓運行的所有可執行文件的路徑列表處理Process32Next失敗，並ERROR_INSUFFICIENT_BUFFER（Windows 7）中

的do-while循環（如下圖所示）開始起飛後約90東西迭代iterations它失敗一個ERROR_INSUFFICIENT_BUFFER錯誤。我認爲這是pBuffer，我嘗試了一個非常大的緩衝區，但仍然失敗。失敗迭代中的ProcessEntry結構在szExeFile中存在垃圾。請指教（我關閉手柄，下方未顯示）

代碼：

// Retrieve a handle to the process snapshot 
HANDLE hProcessSnapshot(CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0)); 
if (INVALID_HANDLE_VALUE == hProcessSnapshot) ERROR; 

// Retrieve information about the first process and exit if unsuccessful 
PROCESSENTRY32 oProcessEntry; 
memset(&oProcessEntry, 0x00, sizeof(oProcessEntry)); 
oProcessEntry.dwSize = sizeof(PROCESSENTRY32); 
BOOL bFileFound(Process32First(hProcessSnapshot, &oProcessEntry)); 
DWORD dwError; 
if(!bFileFound) {   
    dwError = GetLastError(); 
    if(ERROR_NO_MORE_FILES == dwError) return TPathList(); 

    // Error 
    ERROR; 
} 

// Walk the snapshot of processes 
TCHAR pBuffer[MAX_PATH]; 
TPathList lExecutablePaths; 
do { 
    // Get handle to process 
    HANDLE hProcess(OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, 
           FALSE, 
           oProcessEntry.th32ProcessID)); 
    if(INVALID_HANDLE_VALUE == hProcess) ERROR; 
    if (!hProcess) continue; 

    // Get the module path 
    if(GetModuleFileNameEx(hProcess, 0, pBuffer, MAX_PATH) == 0) ERROR;  
    lExecutablePaths.push_back(CPath(pBuffer));   
} 
// Get next process 
while(Process32Next(hProcessSnapshot, &oProcessEntry)); 

// If we ran out of files return what has been found 
dwError = GetLastError(); 
if(ERROR_NO_MORE_FILES == dwError) return lExecutablePaths; 
ERROR;

來源

2012-06-04 ababeel

你可以使用這樣的：

CString sBuffer; 
DWORD dwSize = MAX_PATH + 1, dwError = 0; 

do 
{ 
    GetModuleFileName(NULL, sBuffer.GetBuffer(dwSize), dwSize); 

    // Retrieve the last error. If we've succeeded ERROR_SUCCESS 
    // will be returned; otherwise, we'll get an ERROR_INSUFFICIENT_BUFFER 
    // error. 
    dwError = ::GetLastError(); 

    // Buffer may not be big enough so double its size 
    dwSize *= 2; 
} 
while(dwError == ERROR_INSUFFICIENT_BUFFER 
    && dwError != ERROR_SUCCESS); 

// Release the buffer (turn the string back to const) 
sBuffer.ReleaseBuffer();

我希望它會工作。

你也可以喜歡How can I calculate the complete buffer size for GetModuleFileName?

來源

2012-06-04 06:31:47 vikky

謝謝你，但我遇到的問題是不是與GetModuleFileNameEx但Process32Next功能。這是ERROR_INSUFFICIENT_BUFFER失敗的那個 – ababeel

Process32Next失敗，並ERROR_INSUFFICIENT_BUFFER（Windows 7）中

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