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<?php
/**
* $Id$
*
* Author: David Danier, david.danier@team23.de
* Project: Serverstats, http://serverstats.berlios.de/
* License: GPL v2 or later (http://www.gnu.org/licenses/gpl.html)
*
* Copyright (C) 2005 David Danier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
class external extends source implements source_rrd
{
private $command;
private $datarows;
private $data;
private $dsdef = array();
public function __construct($command)
{
$this->command = $command;
}
public function addDatasourceDefinition($name, $type = 'GAUGE', $heartbeat = null, $min = 'U', $max = 'U')
{
$this->dsdef[$name] = array(
'type' => $type,
'heartbeat' => $heartbeat,
'min' => $min,
'max' => $max
);
}
private function getDatarow()
{
if (isset($this->datarows))
{
return;
}
$this->datarows = array();
$return = 0;
exec(escapeshellcmd($this->command), $this->datarows, $return);
if ($return !== 0)
{
throw new Exception('Could not exec command (' . $this->command . ')');
}
// Some scripts have ugly output, so we have to delete all unneeded spaces
$this->datarows = preg_replace('/([a-zA-Z0-9_]{1,19})[\s,]*:[\s,]*(.+)/', '\\1:\\2', $this->datarows);
}
private function getData()
{
if (isset($this->data))
{
return;
}
$this->getDatarow();
$this->data = array();
foreach ($this->datarows as $datarow)
{
$elements = preg_split('/[\s,]+/', $datarow);
foreach ($elements as $element)
{
if (preg_match('/^([a-zA-Z0-9_]{1,19}):(.+)$/', $element, $split))
{
$this->data[$split[1]] = $split[2];
}
else
{
$this->data[] = $element;
}
}
}
}
public function refreshData()
{
$this->getData();
}
public function initRRD(rrd $rrd)
{
$this->getData();
foreach ($this->data as $key => $value)
{
if (isset($this->dsdef[$key]))
{
$opt = $this->dsdef[$key];
$rrd->addDatasource($key, $opt['type'], $opt['heartbeat'], $opt['min'], $opt['max']);
}
else
{
$rrd->addDatasource($key, 'GAUGE');
}
}
}
public function fetchValues()
{
return $this->data;
}
}
?>
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