Basic select menu.sh

menu.sh

#!/bin/sh

options="Opción1 Opción2 Opción3 Opción4"
selected=0
len=$(echo $options | wc -w)

draw() {
  i=0
  clear
  for opt in $options; do
    if [ $i -eq $selected ]; then
      printf "\033[97;44m%s\033[0m\n" "$opt"
    else
      printf "\033[97m%s\033[0m\n" "$opt"
    fi
    i=$((i+1))
  done
}

readkey() {
  stty -echo -icanon min 1 time 0
  dd bs=1 count=1 2>/dev/null
  stty sane
}

while :; do
  draw
  key=$(readkey)
  if [ "$key" = "$(printf '\n')" ]; then
    break
  elif [ "$key" = "$(printf '\033')" ]; then
    k2=$(readkey)
    k3=$(readkey)
    case "$k2$k3" in
      "[A") [ $selected -gt 0 ] && selected=$((selected-1)) ;;
      "[B") [ $selected -lt $((len-1)) ] && selected=$((selected+1)) ;;
    esac
  fi
done

i=0
for opt in $options; do
  [ $i -eq $selected ] && echo "Seleccionaste: $opt"
  i=$((i+1))
done