China DOS Union

DEL /F /A /Q \\?\%1 

RD /S /Q \\?\%1

Q: Why does the command `rd /s /q \\.\h:\autorun.inf\` can delete all folders including the malformed folders?

`\\.` can be understood as `\\127.0.0.1\`, but actually it doesn't work.
A local special case of UNC.
`?\` can be understood as traversal, `?` is a wildcard, which means matching 0 or 1 arbitrary character.
`.\` represents the local node, conceptually a bit like the root directory of a disk, and can also be said to be the root directory of the computer.
So `dir \\.\C:\` can be recognized by the command line interpreter, and can also be used to reference absolute paths across drive letters. For example:
F:\>\\.\C:\windows\system32\cmd.exe
Microsoft Windows XP
(C) Copyright 1985-2001 Microsoft Corp.
F:\>
UNC paths do not detect reserved word device names in the path, so all folders including malformed folders can be deleted?

Q: Why can `del /q /f /a \\?\%1` delete all files?

A: A special case of UNC paths. UNC paths are in the format `\\servername\sharename`, where `servername` is the server name and `sharename` is the name of the shared resource. `?` is a wildcard, which means matching 0 or 1 arbitrary character. UNC paths do not detect reserved word device names in the path, so this method can be used to delete special files or directories.

Q: Why is such a command very dangerous?

A: If the folder you want to delete contains a special path, it may cause the data of the entire disk partition to be deleted. Therefore, if you are not fully familiar with this command, it is not recommended to use such a command.

Originally posted by purplelichen at 2008-11-17 21:58:
Q: Why is such a command very dangerous?

A: If the folder you want to delete contains a special path, it may cause the data of the entire disk partition to be completely deleted. Therefore, if you still cannot ...

@echo off

if not "%~n1"=="" if not exist "%~f1" goto AAS

if not "%~n1"=="" if exist "%~f1" goto AAS

color 7c

cls

@echo.

@echo                               File Trash Can

@echo.

@echo          Can delete any file or abnormal directory, can drag and drop the target file or directory into the trash can.

@echo.

@echo       To ensure user file safety, avoid dangerous deletion of file names with "^&" combined characters.

@echo.

@echo                                                 Made by: QQ: 251485609

@echo.

pause>nul 2>nul

echo  

goto eof



:AAS

set rt="%~n1"

if "%rt:~1,1%"=="&" goto BS

if "%rt:~1,2%"=="^&" goto BS

del /f /a /q \\?\%1 >nul 2>nul 

rd /s /q \\?\%1 >nul 2>nul

echo  

goto eof



:BS

@echo.

@echo          For safety, such dangerous deletion is not supported.

echo  

pause>nul 2>nul