Get the list of users and file types to collect for and collect the
        data from lsof

def process_lsof(self, users, types):
        """
        Get the list of users and file types to collect for and collect the
        data from lsof
        """
        d = {}
        for u in users:
            d[u] = {}
            tmp = os.popen("lsof -wbu %s | awk '{ print $5 }'" % (
                u)).read().split()
            for t in types:
                d[u][t] = tmp.count(t)
        return d