libraries/classes/SysInfoLinux.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Hold PhpMyAdmin\SysInfoLinux class
   5  *
   6  * @package PhpMyAdmin
   7  */
   8 namespace PhpMyAdmin;
   9
  10 use PhpMyAdmin\SysInfo;
  11 use PhpMyAdmin\SysInfoBase;
  12
  13 /**
  14  * Linux based SysInfo class
  15  *
  16  * @package PhpMyAdmin
  17  */
  18 class SysInfoLinux extends SysInfoBase
  19 {
  20     public $os = 'Linux';
  21
  22     /**
  23      * Gets load information
  24      *
  25      * @return array with load data
  26      */
  27     function loadavg()
  28     {
  29         $buf = file_get_contents('/proc/stat');
  30         $nums = preg_split(
  31             "/\s+/",
  32             mb_substr(
  33                 $buf,
  34                 0,
  35                 mb_strpos($buf, "\n")
  36             )
  37         );
  38
  39         return Array(
  40             'busy' => $nums[1] + $nums[2] + $nums[3],
  41             'idle' => intval($nums[4]),
  42         );
  43     }
  44
  45     /**
  46      * Checks whether class is supported in this environment
  47      *
  48      * @return true on success
  49      */
  50     public function supported()
  51     {
  52         return @is_readable('/proc/meminfo') && @is_readable('/proc/stat');
  53     }
  54
  55     /**
  56      * Gets information about memory usage
  57      *
  58      * @return array with memory usage data
  59      */
  60     function memory()
  61     {
  62         preg_match_all(
  63             SysInfo::MEMORY_REGEXP,
  64             file_get_contents('/proc/meminfo'),
  65             $matches
  66         );
  67
  68         $mem = array_combine($matches[1], $matches[2]);
  69
  70         $defaults = array(
  71             'MemTotal'   => 0,
  72             'MemFree'    => 0,
  73             'Cached'     => 0,
  74             'Buffers'    => 0,
  75             'SwapTotal'  => 0,
  76             'SwapFree'   => 0,
  77             'SwapCached' => 0,
  78         );
  79
  80         $mem = array_merge($defaults, $mem);
  81
  82         foreach ($mem as $idx => $value) {
  83             $mem[$idx] = intval($value);
  84         }
  85
  86         $mem['MemUsed'] = $mem['MemTotal']
  87             - $mem['MemFree'] - $mem['Cached'] - $mem['Buffers'];
  88
  89         $mem['SwapUsed'] = $mem['SwapTotal']
  90             - $mem['SwapFree'] - $mem['SwapCached'];
  91
  92         return $mem;
  93     }
  94 }