Shell Programming and Scripting

trapcatch ()  { echo "Ctl-c Detected, what do you want to do?"
  echo "Please choose the number of one of the following options"
  echo "1.  Jump past this Set"
  echo "2.  Exit altogether"
  echo "Any other key or no key just continues"

  read -t 5 -p "Choose option 1-3 now : " KEYHIT

  case $KEYHIT in
  1*) Echo "OK, I'll bypass this Set then"
      continue 2
      ;;
  2*) Echo "OK, I'll exit gracefully then"
      # need to add the graceful exit here
      exit 99
      ;;
  *)  Echo "OK I'll just carry on then......"
      ;;
  esac    }

trap trapcatch SIGINT SIGTERM

^CCtl-c Detected, what do you want to do?
Please choose the number of one of the following options
1.  Jump past this Set
2.  Exit altogether
Any other key or no key just continues
/usr/sbin/sourceslist.ver0.99: line 1: Echo: not found
/usr/sbin/sourceslist.ver0.99: let: line 1: arithmetic syntax error

echo "Choose option 1-3 now : \c"; read KEYHIT

printf "%s" "Choose option 1-3 now : "

$ cat bb-select.sh

#!/bin/bb

bbselect () {
        local FS="$IFS";        IFS="|" # Split on pipes
        local VAR="$1";         shift   # Get var to save in
        local TITLES="$*"               # TITLES="title1|title2|title3"
        local N=1

        while [ "$#" -gt 0 ]            # Print all titles
        do
                printf "%2d)\t%s\n" "$N" "$1"
                let N=N+1;      shift
        done

        set -- $TITLES                  # $1="title1", $2="title2", ...
        IFS="$FS"                       # Put old splitter back

        read -p "? " REPLY < /dev/tty || return 1

        # Return error when given a non-number
        case "$REPLY" in
        [1-9])  ;;      [0-9][0-9])     ;;
        *)              return 1        ;;
        esac

        # Return error when given an out-of-range number
        [ "$REPLY" -lt 1 ]  && return 1
        [ "$REPLY" -gt $# ] && return 1

        # Look up the correct title text
        let N=REPLY-1
        [ "$N" -gt 0 ] && shift "$N"

        # Put the title text in the variable *named* in VAR
        read $VAR <<EOF
$1
EOF
        # Return success
        return 0
}

while ! bbselect X "Door 1" "Door 2" "Door 3"
do
        echo "Invalid reply $REPLY"
done

echo "Got value '$X' -- number $REPLY"

$ ./bb-select.sh

 1)     Door 1
 2)     Door 2
 3)     Door 3
? 0
Invalid reply 0
 1)     Door 1
 2)     Door 2
 3)     Door 3
? 50
Invalid reply 50
 1)     Door 1
 2)     Door 2
 3)     Door 3
? slartibartfast
Invalid reply slartibartfast
 1)     Door 1
 2)     Door 2
 3)     Door 3
? 3
Got value 'Door 3' -- number 3

$