<?php

	/***  
	* Configuration:  
	* 
	*	$CONFIG = array(
	*		'warning' => array('threshold' => 4, 'time' => 'past5'); 
	*		-> threshold for status warning => 4 of 'uptime' command output for past5 minutes, 
	*		   other options are 'past1' or 'past15'
	*
	*		'critical' => array('threshold' => 5, 'time' => 'past5')
	*		-> threshold for status critical => 5 of 'uptime' command output for past5 minutes, 
	*		   other options are 'past1' or 'past15'
	*	);
	*/


	$CONFIG = array(
		'warning' => array('threshold' => 4, 'time' => 'past5'),
		'critical' => array('threshold' => 5, 'time' => 'past5')
	);


	// exec command
	exec('uptime', $output);
	
	// get result
	if (preg_match('/average: ([0-9]+\.[0-9]{2}), ([0-9]+\.[0-9]{2}), ([0-9]+\.[0-9]{2})$/', $output[0], $result)) {
		$load['past1'] = $result[1];
		$load['past5'] = $result[2];
		$load['past15'] = $result[3];
	}

	// output result
	if ( $load[ $CONFIG['critical']['time'] ] > $CONFIG['critical']['threshold'] ) {
		echo 'FAILURE: 1:'. $load['past1'] .' 5:'. $load['past5'] .' 15:'. $load['past15'] .'|performance:'. $load['past1'];
	}
	elseif ( $load[ $CONFIG['warning']['time'] ] > $CONFIG['warning']['threshold'] ) {
		echo 'WARNING: 1:'. $load['past1'] .' 5:'. $load['past5'] .' 15:'. $load['past15'] .'|performance:'. $load['past1'];
	}
	else {
		echo 'OK: 1:'. $load['past1'] .' 5:'. $load['past5'] .' 15:'. $load['past15'] .'|performance:'. $load['past1'];
	}
	
?>