Document 1408
COMSPEC MAPPING ON NOVELL NETWORK
EM

Description:
LOGIN SCRIPT FOR SYSTEM WITH BOTH COMPAQ DOS 3.31 AND DR DOS 6.0

If you are having problems with setting your Comspec command in
your login script for DR DOS 6.0, here is an explanation and a
solution.

Explanation:
Many applications query DOS as to what version it is - DR DOS
returns a value of MS DOS V3.31.  This "imitation of DOS"
allows DR DOS to run applications that might otherwise reject a
DOS value of greater than 5.0. This value is also important in
that this can be used by some applications to indicate what type
of disk structure they are likely to encounter. This is
especially important for 3rd party disk utilities.

A problem can arise when the login script on the server is
trying to set your Comspec based on the NetWare login script
variables %OS and %OS_VERSION.  A typical use of this is: 

          Map Ins S2:=Servername/SYS:PUBLIC/%OS/%OS_VERSION

Both Compaq DOS 3.31 and DR DOS 3.31 will end up mapped to the
same sub-directory, as they are both reporting to NetWare ( via
the %os_version variable ) a DOS version of 3.31.

Solution:

This sample login script explains and implements a solution:

REM  THE FOLLOWING ESTABLISHES ENVIRONMENTAL VARIABLES
REM  "OS" AND "VER." 

IF <OS> <> "DRDOS" THEN 
BEGIN 
DOS SET OS="%OS"
DOS SET VER="%OS_VERSION"
END

REM  NOW SET YOUR COMSPEC BASED ON THE ENVIRONMENT 
REM  VARIABLES <OS> AND <VER>.

MAP INS S2:=Servername/SYS:PUBLIC/%<OS>/%<VER>