[yifanlu]

I've noticed a bug in your script. Amazon looks for "KEYFILES=$(ls /etc/uks/*pem)" aka, files ending with pem in the keys folder. Your keys end with ".hack" or ".amazon", so they won't work on < 3.1.

Also, here's my version of your script:

#!/bin/sh

PATH=/usr/sbin:/usr/bin:/sbin:/bin
_FUNCTIONS=/etc/rc.d/functions
[ -f ${_FUNCTIONS} ] && . ${_FUNCTIONS}

NAME=update-provider
KEY_DIR=/etc/uks
CONF_DIR=/mnt/us/$NAME

HACKS="HACK_UPDATES"
AMAZON="AMAZON_UPDATES"
SELECTION="amazon"

start() {
	# Make sure extra files aren't considered
	ACTIVE=$(find "$CONF_DIR" -maxdepth 1 -type f | sort -r | grep "$HACKS\|$AMAZON" | head -n 1)
	ACTIVE=${ACTIVE##*/}
	if [ "$ACTIVE" == "$HACKS" ]; then
		SELECTION="hack"
	fi
	
	# Check if user selection changed
	cmp $KEY_DIR/pubprodkey01.pem $KEY_DIR/pubprodkey01.$SELECTION.pem 2>&1 >/dev/null
	if [ $? -ne 0 ]; then
		mntroot_rw
		cp -f "$KEY_DIR/pubprodkey01.$SELECTION.pem" "$KEY_DIR/pubprodkey01.pem"
		cp -f "$KEY_DIR/pubprodkey02.$SELECTION.pem" "$KEY_DIR/pubprodkey02.pem"
		mntroot_ro
	fi
}

case "$1" in
  start)
    start
  ;;
  stop)
  ;;
  restart|force-reload)
    start
  ;;
  *)
    echo "Usage: /etc/init.d/$NAME {start|stop|restart|force-reload}" >&2
    exit 1
  ;;
esac

exit 0