Add auto hostname setting

acatcher/set_hostname.sh

@@ -1,17 +1,16 @@
 #!/bin/bash
 
-	if grep -q raspberrypi /etc/hostname; then
-	  echo "You still have the default hostname set.  We recommend changing the"
-    echo "hostname so that your Pi can be uniquely identified."
-	  echo "If you wish to change it, enter a new hostname now, otherwise"
-	  echo -n "just press Return: "
-	  read NEW_HOSTNAME
-	  if [ ! -z "$NEW_HOSTNAME" ]; then
-	    echo "$NEW_HOSTNAME" > /tmp/HOSTNAME.$$
-	    sudo rm -f /etc/hostname
-      sudo mv /tmp/HOSTNAME.$$ /etc/hostname
-	    sudo chown root:root /etc/hostname
-	    sudo chmod 644 /etc/hostname
-      sudo /etc/init.d/hostname.sh
-	  fi
-	fi
+MAC=`ifconfig eth0 | grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}' | tr '[A-Z]' '[a-z]'`
+if grep -q $MAC HOSTS; then
+  HOSTNAME=`grep $MAC HOSTS | cut -d\| -f1`
+  echo "setting hostname to $HOSTNAME"
+  echo "$HOSTNAME" > /tmp/HOSTNAME.$$
+  sudo rm -f /etc/hostname
+  sudo mv /tmp/HOSTNAME.$$ /etc/hostname
+  sudo chown root:root /etc/hostname
+  sudo chmod 644 /etc/hostname
+  sudo /etc/init.d/hostname.sh
+else
+  echo "cannot determine hostname"
+fi
+exit 1