How to make a batch file to search all drives?

Question

How can I get this batch file to read all physical and mapped drives? It works fine with C: but will not read any other drive.

@echo off
set filePath=
for /R c:\ /d %%a in (*) do if exist "%%a\FileName" set filePath=%%a& goto continue
:continue
if defined filePath echo %COMPUTERNAME% %username% yes >> \\server\%computername%.txt

Answer 1

There's no variable that simply carries all mapped letters.

if you're running as admin,

fsutil fsinfo drives

returns all such drives- an example bit of code:

FOR /F "usebackq tokens=1" %%a IN (`MOUNTVOL ^| FIND ":\"`) DO (FOR /F "usebackq tokens=3" %%b IN (`FSUTIL FSINFO DRIVETYPE %%a`) DO (IF /I "%%b" EQU "Removable" ECHO %%a ))

(play with the outputs)

... if not workable, you're gonna have to blast through them all, ie:

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: @echo %%i:

(probably should omit the expected optical drive/memory-card drive letters).

VBS-scripting, or Powershell is ideal for this sort of thing.