sudo helper

showpw-askpass.sh

#!/bin/zsh

_sudo_showpw() {
		   local	     HIDDEN=true
  while					    true
    do	  if		      [[ -z $HIDDEN ]]	  ;	then
	    if		((CURSOR==${#BUFFER}))
	      then echo   -ne	  ${=BUFFER}
	      else echo   -ne	${${LBUFFER%%?}//?/*}${BUFFER:$CURSOR:1}${RBUFFER//?/*}; fi
	    else   echo   -ne	${${=BUFFER//?/*}};	  fi
    read		  -sk 1	     ONEKEY
    case			    $ONEKEY		  in
      ($'\t')	unset		     HIDDEN		      ;;
      ($'\r')	echo		    $BUFFER	  ;   return 0;;
      ($'\C-?')	if		   ((CURSOR>0))
		   then	  BUFFER=${=LBUFFER%%?}${RBUFFER};fi  ;;
      ($'\e')	   read	  -sk 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   -ne	  ${=BUFFER}
	      else echo   -ne	${${LBUFFER%%?}//?/*}${BUFFER:$CURSOR:1}${RBUFFER//?/*}; fi
	    else   echo   -ne	${${=BUFFER//?/*}};	  fi
	  sleep 1; local	     HIDDEN=true
    done}