source: MondoRescue/branches/2.0.8/mondo/mondo/restore-scripts/mondo/ask-me-a-question@ 576

#!/bin/sh

# ask-me-a-question <string> <choices> (<default>)
# ..returns N integer, Nth position in choices

IsItValid() {
    local incoming validvalues res i callstr
    validvalues=$1
    incoming=$2

    res=`echo "$validvalues" | gawk '{for(i=1;i<=length($0);i++) {print substr($0,i,1);};}' | grep -n "" | grep -i "$incoming" | cut -d':' -f1`
    if [ "$incoming" = "" ] ; then
    return -1
    elif [ "$res" = "" ] ; then
    return 0
    else    
    return $res
    fi

}


# ----------- main -----------

if [ "$#" -ne "2" ] && [ "$#" -ne "3" ] ; then
    echo "ask-me-a-question <string> <responses> (<default>)"
    echo "e.g. ask-me-a-question \"Compression level (0-9)?\" \"0123456789\""
    echo "... only works for integers, or 'y' or 'n'"
    exit 1
fi

LogIt "ask-me-a-question '$1'"

res=0
while [ "$res" -eq "0" ] ; do
    echo -e -n "$1"
    read line
    IsItValid "$2" $line
    res=$?
    if [ "$res" = "-1" ] && [ "$#" -eq "3" ] ; then
    IsItValid "$2" "$3"
    res=$?
    fi
done

LogIt "result of question = $res"
exit $res