How to receive even the strangest command line parameters?

Question

as discussed in an other thread How to avoid cmd.exe interpreting shell special characters like < > ^ it is not easy to get all parameters from the command line.

A simple

set var=%1
set "var=%~1"

are not enough, if you have a request like

myBatch.bat abc"&"^&def

I have one solution, but it needs a temporary file, and it is also not bullet proof.

@echo off
setlocal DisableDelayedExpansion
set "prompt=X"
(
    @echo on
    for %%a in (4) do (
        rem #%1#
    ) 
) > XY.txt
@echo off
for /F "delims=" %%a in (xy.txt) DO (
  set "param=%%a"
)
setlocal EnableDelayedExpansion
set param=!param:~7,-4!
echo param='!param!'

It fails with something like myBatch.bat %a, it display 4 not the %a

in this situation a simple echo %1 would work.
It's obviously the for-loop but I don't know how to change this.
Perhaps there exists another simple solution.

I don't need this to solve an actual problem, but I like solutions that are bullet proof in each situation, not only in the most cases.

Answer 1

I don't think anyone found any holes in this, except for the inability to read newlines in the parameters:

@echo off
setlocal enableDelayedExpansion
set argCnt=1
:getArgs
>"%temp%\getArg.txt" <"%temp%\getArg.txt" (
  setlocal disableExtensions
  set prompt=#
  echo on
  for %%a in (%%a) do rem . %1.
  echo off
  endlocal
  set /p "arg%argCnt%="
  set /p "arg%argCnt%="
  set "arg%argCnt%=!arg%argCnt%:~7,-2!"
  if defined arg%argCnt% (
    set /a argCnt+=1
    shift /1
    goto :getArgs
  ) else set /a argCnt-=1
)
del "%temp%\getArg.txt"
set arg

The above comes from a lively DosTips discussion - http://www.dostips.com/forum/viewtopic.php?p=13002#p13002. DosTips user Liviu came up with the critical SETLOCAL DisableExtensions piece.