# Get the NBD information (ltsp-cluster doesn't have that in the environment)
if [ -f /var/cache/ltsp/ltsp_config ]; then
    . /var/cache/ltsp/ltsp_config
fi
if [ -z "$NBD_ROOT_HOST" ] || ([ -z "$NBD_ROOT_PORT" ] && [ -z "$NBD_ROOT_NAME" ]); then
    return
fi

if [ -n "$NBD_ROOT_NAME" ]; then
    nbd-client $NBD_ROOT_HOST /dev/nbd9 -N $NBD_ROOT_NAME
else
    nbd-client $NBD_ROOT_HOST $NBD_ROOT_PORT /dev/nbd9
fi
NEW=$(dd if=/dev/nbd9 of=/dev/stdout bs=64 count=1 2> /dev/zero | sha1sum -)
PID=$(nbd-client -c /dev/nbd9)
nbd-client -d /dev/nbd9

# Make sure we don't have a remaining nbd-client
if [ -d /proc/$PID ]; then
    while read COLUMN VALUE; do
        if [ "$COLUMN" = "PPid:" ]; then
            kill -9 $VALUE
            break
        fi
    done < /proc/$PID/status
fi

# Get the current squashfs information
CURRENT=$(dd if=/dev/nbd0 of=/dev/stdout bs=64 count=1 2> /dev/zero | sha1sum -)

# Exit if we're already running on the latest squashfs
[ "$NEW" = "$CURRENT" ] && return

(
for i in $(seq 10 10 100);
do
    echo $i
    sleep 1s
done
) | ldm-dialog --progress --auto-close "`eval_gettext "A new version of the system is available, rebooting in 10s."`"

if [ "$?" = "1" ]; then
    return
else
    reboot
fi