linux - Distinguish directory name or path to the directory -

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i have shell script takes directory-name or path directory command-line, , create directory. if want identify argument valid path or directory-name, how can achieve this? if directory-name passed directory created in location script being executed, , if path directory created on path. distinction necessary script.

thanks , regards. 

dir=$(dirname -- "$1")  if test "$dir" != '.';     echo 'path' else     echo 'directory' fi

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