Disk.php

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<?php
 
namespace Rsi\Fred\Health\Check;
 
class Disk extends \Rsi\Fred\Health\Check{
 
  public $path = '/'; //!< Path (disk) to check.
  public $limit = 80; //!< Maximum disk usage level (percent).
  public $message = 'High disk usage [disk] [perc] ([used] of [size], [free] free)';
 
  public function check(&$message = null){
    $value = $message = null;
    if(count($data = preg_split('/\\s+/',exec('df -h ' . escapeshellarg($this->path)))) == 6){
      $value = rtrim($data[4],'%');
      if($this->limit && ($value > $this->limit))
        $message = strtr($this->message,array_combine(['[disk]','[size]','[used]','[free]','[perc]','[mount]'],$data));
    }
    return $value;
  }
 
}