CALL :NORMALIZEPATH "..\..\..\foo\bar.txt"
SET BLAH=%RETVAL%ECHO "%BLAH%"
:: ========== FUNCTIONS ==========
EXIT /B:NORMALIZEPATH
SET RETVAL=%~dpfn1
EXIT /B
출처 : https://stackoverflow.com/questions/1645843/resolve-absolute-path-from-relative-path-and-or-file-name
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