zsh-% which vi 
vi () {
        LIMIT=$# 
        for ((i = 1; i <= $LIMIT; i++ )) do
                eval file="\$$i"
                if [[ -e $file && ! -O $file ]]
                then
                        otherfile=1 
                else

                fi
        done
        if [[ $otherfile = 1 ]]
        then
                echo -ne "\e]1; vi $@\a"
                sudo vi "$@"
                settab
        else
                echo -ne "\e]1; vi $@\a"
                command vi "$@"
                settab
        fi
        unset i
}
zsh-% which vim
vim () {
        # undefined
        builtin autoload -XU
}