Shell Programming and Scripting

    
while :
    do
        print;
        read OPTION?"Enter a number (q to quit): "
        expr ${OPTION} + 1 >/dev/null 2>&1
        CHECKVAL=$?

        if [ "${OPTION#*[Qq]}" != ${OPTION} ]; then
            return
        fi
    done

while read SRV
do
    while :
    do
        print;
        read OPTION?"Enter a number (q to quit): "
        expr ${OPTION} + 1 >/dev/null 2>&1
        CHECKVAL=$?

        if [ "${OPTION#*[Qq]}" != ${OPTION} ]; then
            return
        fi
    done
done < singlecolumnfile.txt

#!/bin/ksh

exec 3< singlecolumnfile.txt

while read -u3 SRV
....
done