How to convert the value of %USERNAME% to lowercase within a Windows batch script?

I'm automating some source control software functionality using a dot bat script but given that our svn repos are hosted in a *NIX box, I'm facing the eternal case problem between these two worlds.

Is there any cmd.exe function to convert the value of the Windows system variable %USERNAME% to lower case?

Thanks much in advance!

From stackoverflow

• a quick google found this...

  @echo off
  goto :end_remarks
  *************************************************************************************
  *
  *
  *    authored:Sam Wofford
  *    Returns lowercase of a string
  *    12:13 PM 11/13/02
  **************************************************************************************
  :end_remarks
  setlocal
  set errorlevel=-1
  if {%1}=={} echo NO ARG GIVEN&call :Help &goto :endit
  if {%1}=={/?} call :Help &goto :endit
  call :set_LCASE_array a b c d e f g h i j k l m n o p q r s t u v w x y z
  
  :start
  set input=%1
  set input=%input:"=%
  set totparams=0
  call :COUNT_PARAMS %input%
  call :MAKE_LOWERCASE %input%
  set errorlevel=
  echo %convertedstring%
  endlocal
  goto :eof
  :endit
  echo %errorlevel%
  endlocal
  goto :eof
  
  :MAKE_LOWERCASE
  :nextstring
  if {%1}=={} goto :eof
  set string=%1
  set /a params+=1
  set STRINGCONVERTED=
  set pos=0
  :NEXT_CHAR
  set onechar=%%string^:^~%pos%,1%%
  for /f "tokens=1,2 delims==" %%a in ('set onechar') do for /f %%c in ('echo %%b') do call :checkit %%c
  if not defined STRINGCONVERTED goto :NEXT_CHAR
  shift /1
  if %params% LSS %totparams% set convertedstring=%convertedstring% &:add one space,but not at end
  goto :nextstring
  goto :eof
  
  :Help
  echo USAGE:%~n0 string OR %~n0 "with spaces"
  echo function returns the lowercase of the string or -1 (error)
  echo strings with embedded spaces needs to be in quotes Ex. "lower case"
  echo in a batch NTscript "for /f %%%%A in ('lcase STRING') do set var=%%%%A"
  set errorlevel=
  goto :eof
  
  :checkit
  set LCFOUND=
  if /i {%1}=={echo} set STRINGCONVERTED=Y&goto :eof
  set char=%1
  for /f "tokens=2 delims=_=" %%A in ('set LCASE_') do call :findit %%A %char%
  :skipit
  if defined LCFOUND (set convertedstring=%convertedstring%%ucletter%) else (set convertedstring=%convertedstring%%char%)
  set /a pos+=1
  goto :eof
  
  :set_LCASE_array
  :setit
  if {%1}=={} goto :eof
  set LCASE_%1_=%1
  SHIFT /1
  goto :setit
  
  :findit
  if defined LCFOUND goto :eof
  set ucletter=%1
  set lcchar=%2
  if /i {%ucletter%}=={%lcchar%} set LCFOUND=yes
  goto :eof
  
  :COUNT_PARAMS
  :COUNTPARAMS
  if {%1}=={} goto :eof
  set /a totparams+=1
  shift /1
  goto :COUNTPARAMS
  

  add that as a file (lowercase.cmd) to your path and you should be able to call it as "Lowercase.cmd %Username%", you could pipe it into another command if needed.

  Greg D : Ew. Thanks for reminding me why I'm trying to sell PowerShell as the windows scripting solution at my org.

  Mauro : LOL...I haven't used command line for a looooong time, all my programming is now javascript, asp.net, c# and sql.

• download some unix utilities for DOS from http://short.stop.home.att.net/freesoft/unix.htm and use tr.exe (translate characters)

  echo %USERNAME% | tr "[A-Z]" "[a-z]"

  I also use a DOS extended cmd replacement named 4NT which has a built in command @lower

  echo %@lower[%USERNAME%]

  Nano Taboada : Thanks much for your comment. I've thought about that approach but that would imply having to install that tools in each user's box, I was interested in solving the problem with existing Windows tools.