China DOS Union

There are still some questions to ask.

It is said that the fsutil command can only be restricted to be used by administrators, and only the XP Pro version can be used.

The dir [drive] >nul 2>nul is too useful.

But do we have to go back to the old way of for %%i in (C: D: E: F: G: H: I: J: K: L: M: N: O: P: Q: R: S: T: U: V: W: X: Y: Z:) do if exist %%i\WIN51 set CDROM=%%i? There is a defect in this old way, that is, it is necessary to judge a specific file. Is there a better way?

According to the idea of 26933062, I made one

@echo off&setlocal EnableDelayedExpansion

for /f "usebackq skip=1 tokens=2 delims==" %%a in (`findcd /s`) do (

  set "str=%%a"

  set "str=!str:~0,1!"

  dir !str!: >nul 2>nul

chcp 936>nul

  if !ERRORLEVEL! equ 0 (echo.&echo The CD is drive !str! and there is a CD inside) else (

     echo.&echo The CD is drive !str! and there is no CD

))

echo.&pause&exit

Explanation: findcd.exe is a third-party program, only 3.11K

If this program findcd is added with the /s parameter, it will list multiple CDs, and the result is as in the following example:

CDROM=2
CDROM1=H:
CDROM2=I:

Under old DOS, these variables will be assigned, saving a lot of trouble, but under XP, it can't! And it will change the codepage, so I added a line CHCP 936.

The actual running result is as follows:

The CD is drive 2 and there is a CD inside



The CD is drive H and there is a CD inside



The CD is drive I and there is a CD inside



Press any key to continue...

Why is there an extra line, it seems that skip=1 is useless, I don't understand.

Why can't I insert an attachment? I want to attach the program of findcd. Download here

[ Last edited by quya on 2008-5-28 at 11:29 PM ]

%var1%^|more
%var2% %%a:
This trick in floor 11 looks very neat!

[ Last edited by WANKOILZ on 2008-5-29 at 07:38 PM ]