DOS - CDROM letter [Resolved - work around]

Hi all, non-vb time :)

1. How can I return (thru a batch file / command line) the drive letter of the CDROM, or

2. If I have a batch file resident on a CD, can I do something like 'Echo Path' and have it display the 'current path' (being the drive letter).


Scenario:
I need to pass a file as a parameter to a M$ app, and this particular app requires a full path for the param. As the file will be on CD, I don't want to 'hard' code the drive letter :).

I think I have tried all internal and external DOS commands and %systemroot% etc!



Bruce.

DOS doesnt know the difference between a harddrive drive letter and a cdrom drive letter.

What OS is this?

XP/2000

I know that I can do it in VB, C++ or script, but I thought I could simply do it thru DOS somehow.



Bruce.

Quote:

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Originally posted by Bruce Fox
XP/2000

I know that I can do it in VB, C++ or script, but I thought I could simply do it thru DOS somehow.

Bruce.

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Somehow, yes it can be done, but not on a default installation of DOS. If somehow, someone, somewhere, were to create DOS environment variables like:

CDDRIVE=E:\

or something like that, THEN DOS could use that environment variable to determine the drive letter of a CDROM.

But you will have to place a line in the user's autoexec.bat file to remain persistent.

How about the LASTDRIVE? Unless there are multiple CD drives, then the highest one is the one that you want.

this is usually in the autoexec.bat file on systems with a CD.

Thanks for the replies guys,

I have a work around (using VBScript).

I did however find two examples to do it with DOS!
Both involved iterating past the alphabet.
So for anyone interested, it can be done with a few lines of DOS (which is what I was trying to avoid).


Here is the test Script:

VB Code:

Option Explicit
 
Dim objFSO     'File System Object
Dim objArgs     'Arguments
 
'Set Objects
Set objFSO = WScript.CreateObject("Scripting.FileSystemObject")
Set objArgs = WScript.Arguments
 
If objArgs.Count <> 0 Then
    msgbox objFSO.GetFolder("\") & objArgs(0)
Else
    MsgBox "No FileName was given"
End If
 
Set objFSO = Nothing
Set objArgs = Nothing

The trick was using GetFolder without specifying a drive/path


And after all that I'm probably not going to use it anyway :)




Bruce.