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  1. <?php /* <ViaThinkSoftSignature>
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  23. w==
  24. </ViaThinkSoftSignature> */ ?>
  25. <?php
  26.  
  27. /*
  28.  * VNag - Nagios Framework for PHP
  29.  * Developed by Daniel Marschall, ViaThinkSoft <www.viathinksoft.com>
  30.  * Licensed under the terms of the Apache 2.0 license
  31.  *
  32.  * Revision 2018-07-17
  33.  */
  34.  
  35. declare(ticks=1);
  36.  
  37. class SmartCheck extends VNag {
  38.         public function __construct() {
  39.                 parent::__construct();
  40.  
  41.                 if ($this->is_http_mode()) {
  42.                         // Don't allow the standard arguments via $_REQUEST
  43.                         $this->registerExpectedStandardArguments('');
  44.                 } else {
  45.                         $this->registerExpectedStandardArguments('Vhtv');
  46.                 }
  47.  
  48.                 $this->getHelpManager()->setPluginName('vnag_smart');
  49.                 $this->getHelpManager()->setVersion('1.0');
  50.                 $this->getHelpManager()->setShortDescription('This plugin checks the contents of the SMART data and warns when a harddisk has failed.');
  51.                 $this->getHelpManager()->setCopyright('Copyright (C) 2011-$CURYEAR$ Daniel Marschall, ViaThinkSoft.');
  52.                 $this->getHelpManager()->setSyntax('$SCRIPTNAME$ (no additional arguments expected)');
  53.                 $this->getHelpManager()->setFootNotes('If you encounter bugs, please contact ViaThinkSoft at www.viathinksoft.com');
  54.         }
  55.  
  56.         private function check_smart($dev) {
  57.                 if (!`which which`) {
  58.                         throw new VNagException("Program 'which' is not installed on your system");
  59.                 }
  60.  
  61.                 if (!`which smartctl`) {
  62.                         throw new VNagException("Program 'smartctl' (usually included in package smartmontools) is not installed on your system");
  63.                 }
  64.  
  65.                 if (!`sudo cat /proc/cpuinfo`) {
  66.                         // To make this work, please run "visudo" and add the following line:
  67.                         // nagios ALL=NOPASSWD: /usr/sbin/smartctl
  68.                         throw new VNagException("You don't have SUDO privileges. Please run 'visudo' and allow the command /usr/sbin/smartctl for user ".get_current_user().".");
  69.                 }
  70.  
  71.                 unset($out);
  72.                 exec('sudo smartctl --all '.escapeshellarg($dev), $out, $code);
  73.                 $cont = implode("\n", $out);
  74.  
  75.                 $msg = array();
  76.                 $status = -1;
  77.  
  78.                 if (stripos($cont, 'device lacks SMART capability') !== false)  {
  79.                         // At my system (Debian 9), I get exit code 4 (which is not fully accurate)
  80.                         $msg[] = 'Device lacks SMART capability';
  81.                         #$status = VNag::STATUS_UNKNOWN;
  82.                 } else if ($code == 0) {
  83.                         $status = VNag::STATUS_OK;
  84.                 } else {
  85.                         if ($code & 1) {
  86.                                 throw new Exception("smartctl reports 'command line did not parse' (code $code).");
  87.                         }
  88.                         if ($code & 2) {
  89.                                 $msg[] = "Device open failed. It is either completely defective, or in low-power mode.";
  90.                                 $status = max($status, VNag::STATUS_CRITICAL);
  91.                         }
  92.                         if ($code & 4) {
  93.                                 $msg[] = "SMART command failed or checksum is wrong.";
  94.                                 $status = max($status, VNag::STATUS_WARNING);
  95.                         }
  96.                         if ($code & 8) {
  97.                                 $msg[] = "SMART status returns 'DISK FAILING'";
  98.                                 $status = max($status, VNag::STATUS_CRITICAL);
  99.                         }
  100.                         if ($code & 16) {
  101.                                 $msg[] = "SMART found prefail attributes below threshold";
  102.                                 $status = max($status, VNag::STATUS_WARNING);
  103.                         }
  104.                         if ($code & 32) {
  105.                                 $msg[] = "SMART status is 'OK' but usage/prefail attributes have been below threshold in the past.";
  106.                                 $status = max($status, VNag::STATUS_WARNING);
  107.                         }
  108.                         if ($code & 64) {
  109.                                 $msg[] = "The device error log contains records of errors.";
  110.                                 $status = max($status, VNag::STATUS_WARNING);
  111.                         }
  112.                         if ($code & 128) {
  113.                                 $msg[] = "The self-test logs contains records of errors.";
  114.                                 $status = max($status, VNag::STATUS_WARNING);
  115.                         }
  116.                 }
  117.  
  118.                 $messages = implode(", ", $msg);
  119.                 if ($messages != '') $messages = ": $messages";
  120.  
  121.                 if ($status == VNag::STATUS_CRITICAL) {
  122.                         $this->addVerboseMessage("$dev (Critical)$messages", VNag::VERBOSITY_SUMMARY);
  123.                 } else if ($status == VNag::STATUS_WARNING) {
  124.                         $this->addVerboseMessage("$dev (Warning)$messages", VNag::VERBOSITY_SUMMARY);
  125.                 } else if ($status == VNag::STATUS_OK) {
  126.                         $this->addVerboseMessage("$dev (OK)$messages", VNag::VERBOSITY_ADDITIONAL_INFORMATION);
  127.                 } else {
  128.                         $status = VNag::STATUS_UNKNOWN;
  129.                         $this->addVerboseMessage("$dev (Unknown)$messages", VNag::VERBOSITY_SUMMARY);
  130.                 }
  131.                 $this->setStatus($status);
  132.                 return $status;
  133.         }
  134.  
  135.         protected function cbRun() {
  136.                 $devices = array();
  137.                 $devices = array_merge($devices, glob('/dev/sd?'));
  138.                 $devices = array_merge($devices, glob('/dev/hd?'));
  139.  
  140.                 $count_total = 0;
  141.                 $count_ok = 0;
  142.                 $count_warning = 0;
  143.                 $count_critical = 0;
  144.                 $count_unknown = 0;
  145.                 foreach ($devices as $dev) {
  146.                         $count_total++;
  147.                         switch ($this->check_smart($dev)) {
  148.                                 case VNag::STATUS_OK:
  149.                                         $count_ok++;
  150.                                         break;
  151.                                 case VNag::STATUS_WARNING:
  152.                                         $count_warning++;
  153.                                         break;
  154.                                 case VNag::STATUS_CRITICAL:
  155.                                         $count_critical++;
  156.                                         break;
  157.                                 case VNag::STATUS_UNKNOWN:
  158.                                         $count_unknown++;
  159.                                         break;
  160.                         }
  161.                 }
  162.  
  163.                 $this->setHeadline(sprintf('Checked %d drives (%d OK, %d warning, %d critical, %d unknown)', $count_total, $count_ok, $count_warning, $count_critical, $count_unknown));
  164.         }
  165. }
  166.