Q121387: Use of the %0\..\ Syntax in the Smsls.bat File

Article: Q121387
Product(s): Microsoft Systems Management Server
Version(s): winnt:1.0,1.1,1.2
Operating System(s): 
Keyword(s): kbnetwork kbConfig smshowto smsconfig
Last Modified: 24-JUL-2001

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The information in this article applies to:

- Microsoft Systems Management Server versions 1.0, 1.1, 1.2 
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SUMMARY
=======

When programs are run from a logon script, and they are located in the NETLOGON
share, the actual logon script can not determine what drive or path to execute
the program from, and the NETLOGON share is not included in the MS-DOS path
statement. To resolve this, Systems Management Server uses a little known
feature of MS-DOS to determine the drive and path the script is running from.

MORE INFORMATION
================

During a log on and when the logon script is running, the Lmscript.exe program
runs its commands from the NETLOGON share. However, batch files have no way of
determining where they are running from, and the current directory set by
Lmscript.exe is not the NETLOGON share. As a workaround, Systems Management
Server uses the %0\..\ path to indicate the argv[0] present when the batch file
was run. The batch file can then refer to this path and determine its own
location and look for other files there.

An example of this can be found in the Slow Network detection portion of the
Smsls.bat logon script file:

     REM SNET_DOS
     %0\..\netspeed
     if not errorlevel 1 goto NET_DOS
     if not errorlevel 2 goto END
     if errorlevel 2 %0\..\choice /T:Y,30 Slow network detected. Continue
     if not errorlevel 2 goto NET_DOS
     goto END

Prior to use of this technique, Systems Management Server was forced to use
hard-coded drive Z to reference needed files. Now the drive used during a NET
LOGON can be arbitrary, and dynamically determined.

Additional query words: sms prodsms login

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Keywords          : kbnetwork kbConfig smshowto smsconfig 
Technology        : kbSMSSearch kbSMS100 kbSMS110 kbSMS120
Version           : winnt:1.0,1.1,1.2
Issue type        : kbinfo

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