UNIX for Dummies Questions & Answers

ok=false
while [ $ok = false ]
do
echo " Enter r1 to reformat "
> /dev/tty
read choice
case $choice in
         [r1])
         echo " bla bla bla "
         ;;
done

ok=false
while [ $ok = false ]
do
echo " Enter r1 to reformat "
> /dev/tty
read choice
case $choice in
         r1) # without the [ and ]
         echo " bla bla bla "
         ;;
done

readOne () {
oldstty="`stty -g`"
stty -icanon -echo min 1 time 0
dd bs=1 count=1 2> /dev/null #>/dev/null 2>&1
stty "$oldstty"
echo
}

readWord() {
  while true; do
    unset STR
    C=0
    printf "Enter '$1' to continue: "
    while [ $C -lt ${#1} ]; do
      E=$(readOne)
      [ -z "$E" ] && break
      STR=$STR$E
      C=$((C+1))
    done
    [ "$STR" = "$1" ] && break
    echo "Invalid string.  Please try again!"
  done
}

readWord r1