呼び出し

@echo off

call %~dp0file_loader.bat %*

for %%i in (%__ARGS%) do echo %%~dpnxtzi

pause


@echo off

call %~dp0file_loader.bat %*
call :READ_ARGS %__ARGS%
goto :END

:READ_ARGS
echo %1
for %%i in (%*) do echo %%~dpnxtzi
exit /b

:END
pause

外部bat

file_loader.bat

@echo off
setlocal

for %%i in (%*) do if not exist %%i goto :__ARRANGE_MODE
set __ARGS=%*
goto :__END

:__ARRANGE_MODE
set __PRE=%*
set __PRE=%__PRE:　=:1%
set __PRE=%__PRE:,=:2%
set __PRE=%__PRE:;=:3%

for %%i in (%__PRE%) do call :__MERGE_ALL %%i
set __ARGS=%__ARGS:~1%
set __ARGS=%__ARGS::1=　%
set __ARGS=%__ARGS::2=,%
set __ARGS=%__ARGS::3=;%
set __ARGS="%__ARGS:?=" "%"
goto :__END

:__MERGE_ALL
set __V=%~1
if "%__V::\=%" == "%__V%" (
	set __ARGS=%__ARGS%=%__V%
) else (
	set __ARGS=%__ARGS%?%__V%
)
exit /b

:__END
endlocal & set __ARGS=%__ARGS%
exit /b