Kraken's IP

kraken_ip.sh

#!/bin/bash

HOSTS="/etc/hosts"
MOUNT_DIR="/home/honza/.kraken"
kraken_ip=""

lan=(`nmap -sP 192.168.1.* | grep 192 | sed -e s/[^0-9\.]//g`)
for ip in "${lan[@]}"; do
    if curl -s "http://$ip" | grep -q "ShareCenter"
    then
        echo "Kraken's IP: $ip"
        hosts_ip=`cat "$HOSTS" | grep "kraken" | sed -e s/[^0-9\.]//g`

        if [[ "$ip" != "$hosts_ip" ]]
        then
            echo "Kraken's IP has changed! ($hosts_ip -> $ip)"
            echo "Editing hosts file."
            sed -e "s/$hosts_ip/$ip/" -i "$HOSTS"
            echo "Detaching filesystem."
            umount -f "$MOUNT_DIR"
            echo "Attaching all filesystems."
            mount -a
        fi
        kraken_ip="$ip"
        break
    fi
done

if [[ ! "$kraken_ip" ]]
then
    echo "Kraken's IP address not found."
    exit 1
fi