@linuxmaniac commented on this pull request.

In src/modules/pv/pv_core.c:

> +	sp->pvp.pvn.u.dname = (void*)csname;
+	sp->pvp.pvn.type = PV_NAME_OTHER;
+	return 0;
+}
+
+int pv_get_env(sip_msg_t *msg, pv_param_t *param, pv_value_t *res)
+{
+	char *val;
+	char *csname = (char *) param->pvn.u.dname;
+
+	if (csname) {
+		val = getenv(csname);
+
+		if (val) {
+			return pv_get_strzval(msg, param, res, val);
+		} else {

what about

if (csname) {
  val = getenv(csname);
  if(val) return pv_get_strzval(msg, param, res, val);
}
return pv_get_null(msg, param, res);

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