title: zabbix_get shows no return values
body: <p>I have this shell script <code>ordem2.sh</code>. It works fine when executed in the command line:</p>
  
  <pre><code>var="$( mysql -Ns -uzabbix -e 'select ordem from mon.vendas')"
  echo $var
  </code></pre>
  
  <p>I add <code>UserParameter</code> in <code>/etc/zabbix_agentd.conf</code></p>
  
  <pre><code>UserParameter=ordem2,/home/ordem2.sh
  </code></pre>
  
  <p>But when I try to get information from zabbix 2.0 using <code>zabbix_get -s 127.0.0.1 -p 10050 -k "ordem2"</code>, it shows no return value. What is wrong with this script?</p>