[ILUG] shell quiz !

[John P . Looney]

 Actually, the winner is Paul Kelly, and his interesting use of "bc";

IP_START=$1
IP_END=$2

IS1=`echo $IP_START | cut -d '.' -f 1`
IS2=`echo $IP_START | cut -d '.' -f 2`
IS3=`echo $IP_START | cut -d '.' -f 3`
IS4=`echo $IP_START | cut -d '.' -f 4`

IE1=`echo $IP_END | cut -d '.' -f 1`
IE2=`echo $IP_END | cut -d '.' -f 2`
IE3=`echo $IP_END | cut -d '.' -f 3`
IE4=`echo $IP_END | cut -d '.' -f 4`

for i in `echo " 
    start=$IS1 * (256^3) + $IS2 * (256^2) + $IS3 * (256^1) + $IS4
    end=$IE1 * (256^3) + $IE2 * (256^2) + $IE3 * (256^1) + $IE4
    
    obase=256
    while (start <= end) {
        start++
    }
" | bc | sed -e 's/ 0*/./g' | sed -e 's/^\.//' | sed -e 's/\.\./.0./' | \
sed -e 's/\.\./.0./' | sed -e 's/\.$/.0/'` 
do
    echo $i
done

-- 
 When I say 'free', I mean 'free': free from bond, of chain or command: 
to go where you will, even to Mordor, Saruman, if you desire. " 
    -- Gandalf, paraphrasing the choice between Free and Non-free software