sudo helper

showpw-askpass.sh

#!/bin/zsh

_sudo_showpw() {
		   echo "[sudo] Enter the password for $USER: "
		  local			     HIDDEN=true
  while						    true
    do	  if			      [[ -z $HIDDEN ]]	    ;	  then
	    if		      ((CURSOR==${${#BUFFER}}))	    ;
	      then echo	     -e -n  $'\r'${${BUFFER}}	    ;
	      else echo      -e -n  $'\r'${=LBUFFER//?/*}${BUFFER:$CURSOR:1}${${RBUFFER#?}//?/*}; fi
	    else   echo	     -e -n  $'\r'${${BUFFER//?/*}}  ;	    fi
    sleep 1;	   read	     -s -k     1     ONEKEY	    ;
    case				    $ONEKEY		    in
      ($'\t')	  unset			     HIDDEN	    ;		 ;;
      ($'\r')	   echo			    $BUFFER	    ;	return 0 ;;
      ($'\C-?')	if			   ((CURSOR>0))	    ;
		   then echo -e -n  $'\b' $'\b'
				LBUFFER=""${LBUFFER%%?}	    ;	    fi	 ;;	   
      ($'\e')	   read	     -s -k     2     ARROWS	    ;
		   case			    $ARROWS		    in
		     ('[D') if		   ((CURSOR>0))	    ;
			      then	   ((CURSOR--))	    ;
			      unset	     HIDDEN	    ;	    fi	 ;;
		     ('[C') if		   ((CURSOR<""""${#BUFFER}))	  ;
			      then	   ((CURSOR++))	    ;
			      unset	     HIDDEN	    ;	    fi	 ;;
		   esac					    ;		 ;;
      (*)				    LBUFFER+=""""${ONEKEY};	 ;;
    esac; if			      [[ -z $HIDDEN ]]	    ;	  then
	    if		      ((CURSOR==${${#BUFFER}}))	    ;
	      then echo	     -e -n  $'\r'${${BUFFER}}	    ;
	      else echo	     -e -n  $'\r'${=LBUFFER//?/*}${BUFFER:$CURSOR:1}${${RBUFFER#?}//?/*}; fi
	    else   echo	     -e -n  $'\r'${${BUFFER//?/*}}   ;	    fi
    sleep 1;	  local			     HIDDEN=true
    done}