Something

#! /bin/bash

# parse injected string and create file marker
        INJECTED=$( < /proc/cmdline )
        TOSRC="${INJECTED##*tty}"
        echo "$TOSRC" > /tmp/injectedvars
        source /tmp/injectedvars
# create marker NODE=1 GRID_NAME=MYGRID CLUSTER_NAME=ABC TICKET_ID=1111-2222-3333-4444-ABCD
        if [ "$NODE" ] && [ "$TICKET_ID" ] && [ "CLUSTER_NAME" ]; then
                echo "captured bootstrap parameters successfully!"
        else
                echo "bootstrap is not set ! please check xen startup procedure..."
                exit 1
        fi