-trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR
-
-cd $(dirname $(readlink -f "$BASH_SOURCE"))
-
+cleanup() { :; }
+trap 'cleanup; echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?" >&2' ERR
+
+x="$(readlink -f "$BASH_SOURCE")"; cd ${x%/*}
+
+usage() {
+ cat <<EOF
+usage: ${0##*/} [-h|--help]
+Create a vm which is a fai server.
+
+This assumes you've set the dhcp server to make 52:54:00:56:09:f9 be
+faiserver. That mac is a randomly generated one in the libvirt range.
+EOF
+ exit $1
+}
+case $1 in
+ -h|--help) usage ;;
+esac
+
+cleanup() { pxe-server :; }