liam

yesno() {shopt -s extglobunset varYES='[Yy]?([Ee][Ss])'NO='[Nn]?([Oo])'while [[ "$var" != $YES && "$var" != $NO ]]do        read var        case $var in        $YES)                return 0        ;;        $NO)                return 1        ;;        esacdone}echo -e Test?yesnoif [ -n "$?" ]then        echo Noelse        echo Yesfi