Enumeration drive (allyesno)

Freexploit Original article

Principle:

IfThe command cannot be used to directly test the directory, but the empty (NUL) device does exist in each directory. Therefore, you can test the zero device to determine whether the directory exists. The following example shows how to test the existence of a directory:

If exist C: mydir/NUL goto Process

@ Echo off
Rem test in Win2k & WINXP by allyesno
CLS
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:/NUL echo % I drive can use & dir % I: | find "available"

The two drive A and B are not listed for the reason.