@echo off
cls

setlocal
set _target_drive=flag
if not exist Z: set _target_drive=Z:
if "%_target_drive%"=="flag" if not exist Y: set _target_drive=Y:
if "%_target_drive%"=="flag" if not exist T: set _target_drive=T:
if "%_target_drive%"=="flag" if not exist S: set _target_drive=S:
if "%_target_drive%"=="flag" if not exist R: set _target_drive=R:
if "%_target_drive%"=="flag" if not exist P: set _target_drive=P:
if "%_target_drive%"=="flag" if not exist O: set _target_drive=O:
if "%_target_drive%"=="flag" if not exist N: set _target_drive=N:

if "%_target_drive%"=="flag" goto drive-error


net use %_target_drive% \\zwinsan17\%username%$ /user:slac\%username% /persistent:yes
if not exist %_target_drive% net use %_target_drive% \\zwinsan16\%username%$ /user:slac\%username% /persistent:yes
if not exist %_target_drive% net use %_target_drive% \\zwinsan14\%username%$ /user:slac\%username% /persistent:yes
if not exist %_target_drive% net use %_target_drive% \\zwinsan15\%username%$ /user:slac\%username% /persistent:yes

if not exist %_target_drive%\ goto map-error
echo:
echo Home directory for %username% has been mapped on drive %_target_drive%.
echo:
goto end


:drive-error
echo:
echo Error - Need an available drive letter on N: O: P: R: S: T: Y: or Z:
echo:
goto end


:map-error
echo:
echo  Error - Home directory for %username% not found.
echo:
echo  The server may not be reachable or the folder may not be available.
echo:


:end
endlocal
pause