libraries/SysInfoLinux.php

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