sudo helper

showpw-askpass.sh

#!/bin/zsh

_sudo_showpw() {
		   echo "[sudo] Enter credentials of $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				   $ARROWS		      in
		     ('[D') if			  ((CURSOR>0))	 ;
			      then		  ((CURSOR--))	 ;
			      echo -e -n		    ''	 ;
			      unset		    HIDDEN	 ;	      fi  ;;
		     ('[C') if			  ((CURSOR<""""${#BUFFER})) ;
			      then		  ((CURSOR++))	 ;
			      echo -e -n		    ''	 ;
			      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}