<p>In modules/exec/exec.c:</p>
<pre style='color:#555'>&gt; +                        return -1;
&gt; +                }
&gt; +        }
&gt; +
&gt; +        if (errvar) {
&gt; +                if (read_and_write2var(msg, &amp;perr, errvar) &lt; 0) {
&gt; +                        LM_ERR(&quot;failed reading stderr from pipe\n&quot;);
&gt; +                        return -1;
&gt; +                }
&gt; +        }
&gt; +
&gt; +        ret=1;
&gt; +
&gt; +error:
&gt; +        if (outvar &amp;&amp; ferror(pout)) {
&gt; +                LM_ERR(&quot;reading pipe: %s\n&quot;, strerror(errno));
</pre>
<p><code>+ stdout</code></p>

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