Bash Password Entry

function getpassword() {
    local charcount=0
    local password=''
    local CHAR=''
    local PROMPT=''
    stty -echo
    while IFS= read -p "$PROMPT" -r -s -n 1 CHAR
    do
        # Enter - accept password
        if [[ $CHAR == $'\0' ]]; then
            break
        fi
        # Backspace
        if [[ $CHAR == $'\177' ]]; then
            if [ $charcount -gt 0 ]; then
                charcount=$((charcount-1))
                PROMPT=$'\b \b'
                password="${password%?}"
            else
                PROMPT=''
            fi
        else
            charcount=$((charcount+1))
            PROMPT='*'
            password+="$CHAR"
        fi
    done
    stty echo
    echo $password
}

while IFS= true; do
    printf "MySQL Password: "
    MPASSWD="$(getpassword)"
    echo
    printf "MySQL Password (again): "
    TMPASSWD="$(getpassword)"
    echo
    [ "$MPASSWD" = "$TMPASSWD" ] && break
    echo "Please try again."
done