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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Library for extracting information about system memory and cpu.
* Currently supports all Windows and Linux plattforms
*
* This code is based on the OS Classes from the phpsysinfo project
* (http://phpsysinfo.sourceforge.net/)
*
* @package PhpMyAdmin-sysinfo
*/
if (! defined('PHPMYADMIN')) {
exit;
}
define(
'MEMORY_REGEXP',
'/^(MemTotal|MemFree|Cached|Buffers|SwapCached|SwapTotal|SwapFree):'
. '\s+(.*)\s*kB/im'
);
/**
* Returns OS type used for sysinfo class
*
* @param string $php_os PHP_OS constant
*
* @return string
*/
function PMA_getSysInfoOs($php_os = PHP_OS)
{
// look for common UNIX-like systems
$unix_like = array('FreeBSD', 'DragonFly');
if (in_array($php_os, $unix_like)) {
$php_os = 'Linux';
}
return ucfirst($php_os);
}
/**
* Gets sysinfo class mathing current OS
*
* @return PMA_SysInfo|mixed sysinfo class
*/
function PMA_getSysInfo()
{
$php_os = PMA_getSysInfoOs();
$supported = array('Linux', 'WINNT', 'SunOS');
if (in_array($php_os, $supported)) {
$class_name = 'PMA_SysInfo' . $php_os;
$ret = new $class_name();
if ($ret->supported()) {
return $ret;
}
}
return new PMA_SysInfo();
}
/**
* Basic sysinfo class not providing any real data.
*
* @package PhpMyAdmin-sysinfo
*/
class PMA_SysInfo
{
public $os = PHP_OS;
/**
* Gets load information
*
* @return array with load data
*/
public function loadavg()
{
return array('loadavg' => 0);
}
/**
* Gets information about memory usage
*
* @return array with memory usage data
*/
public function memory()
{
return array();
}
/**
* Checks whether class is supported in this environment
*
* @return true on success
*/
public function supported()
{
return true;
}
}
/**
* Windows NT based SysInfo class
*
* @package PhpMyAdmin-sysinfo
*/
class PMA_SysInfoWinnt extends PMA_SysInfo
{
private $_wmi;
public $os = 'WINNT';
/**
* Constructor to access to wmi database.
*/
public function __construct()
{
if (!class_exists('COM')) {
$this->_wmi = null;
} else {
// initialize the wmi object
$objLocator = new COM('WbemScripting.SWbemLocator');
$this->_wmi = $objLocator->ConnectServer();
}
}
/**
* Gets load information
*
* @return array with load data
*/
function loadavg()
{
$loadavg = "";
$sum = 0;
$buffer = $this->_getWMI('Win32_Processor', array('LoadPercentage'));
foreach ($buffer as $load) {
$value = $load['LoadPercentage'];
$loadavg .= $value . ' ';
$sum += $value;
}
return array('loadavg' => $sum / count($buffer));
}
/**
* Checks whether class is supported in this environment
*
* @return true on success
*/
public function supported()
{
return !is_null($this->_wmi);
}
/**
* Reads data from WMI
*
* @param string $strClass Class to read
* @param array $strValue Values to read
*
* @return array with results
*/
private function _getWMI($strClass, $strValue = array())
{
$arrData = array();
$value = "";
$objWEBM = $this->_wmi->Get($strClass);
$arrProp = $objWEBM->Properties_;
$arrWEBMCol = $objWEBM->Instances_();
foreach ($arrWEBMCol as $objItem) {
if (is_array($arrProp)) {
reset($arrProp);
}
$arrInstance = array();
foreach ($arrProp as $propItem) {
$name = $propItem->Name;
if ( empty($strValue) || in_array($name, $strValue)) {
$value = $objItem->$name;
$arrInstance[$name] = trim($value);
}
}
$arrData[] = $arrInstance;
}
return $arrData;
}
/**
* Gets information about memory usage
*
* @return array with memory usage data
*/
function memory()
{
$buffer = $this->_getWMI(
"Win32_OperatingSystem",
array('TotalVisibleMemorySize', 'FreePhysicalMemory')
);
$mem = Array();
$mem['MemTotal'] = $buffer[0]['TotalVisibleMemorySize'];
$mem['MemFree'] = $buffer[0]['FreePhysicalMemory'];
$mem['MemUsed'] = $mem['MemTotal'] - $mem['MemFree'];
$buffer = $this->_getWMI('Win32_PageFileUsage');
$mem['SwapTotal'] = 0;
$mem['SwapUsed'] = 0;
$mem['SwapPeak'] = 0;
foreach ($buffer as $swapdevice) {
$mem['SwapTotal'] += $swapdevice['AllocatedBaseSize'] * 1024;
$mem['SwapUsed'] += $swapdevice['CurrentUsage'] * 1024;
$mem['SwapPeak'] += $swapdevice['PeakUsage'] * 1024;
}
return $mem;
}
}
/**
* Linux based SysInfo class
*
* @package PhpMyAdmin-sysinfo
*/
class PMA_SysInfoLinux extends PMA_SysInfo
{
public $os = 'Linux';
/**
* Gets load information
*
* @return array with load data
*/
function loadavg()
{
$buf = file_get_contents('/proc/stat');
$nums = preg_split("/\s+/", substr($buf, 0, strpos($buf, "\n")));
return Array(
'busy' => $nums[1] + $nums[2] + $nums[3],
'idle' => intval($nums[4])
);
}
/**
* Checks whether class is supported in this environment
*
* @return true on success
*/
public function supported()
{
return is_readable('/proc/meminfo') && is_readable('/proc/stat');
}
/**
* Gets information about memory usage
*
* @return array with memory usage data
*/
function memory()
{
preg_match_all(
MEMORY_REGEXP,
file_get_contents('/proc/meminfo'),
$matches
);
$mem = array_combine($matches[1], $matches[2]);
$memTotal = isset($mem['MemTotal']) ? $mem['MemTotal'] : 0;
$memFree = isset($mem['MemFree']) ? $mem['MemFree'] : 0;
$cached = isset($mem['Cached']) ? $mem['Cached'] : 0;
$buffers = isset($mem['Buffers']) ? $mem['Buffers'] : 0;
$swapTotal = isset($mem['SwapTotal']) ? $mem['SwapTotal'] : 0;
$swapFree = isset($mem['SwapFree']) ? $mem['SwapFree'] : 0;
$swapCached = isset($mem['SwapCached']) ? $mem['SwapCached'] : 0;
$mem['MemUsed']
= $memTotal - $memFree - $cached - $buffers;
$mem['SwapUsed']
= $swapTotal - $swapFree - $swapCached;
foreach ($mem as $idx => $value) {
$mem[$idx] = intval($value);
}
return $mem;
}
}
/**
* SunOS based SysInfo class
*
* @package PhpMyAdmin-sysinfo
*/
class PMA_SysInfoSunos extends PMA_SysInfo
{
public $os = 'SunOS';
/**
* Read value from kstat
*
* @param string $key Key to read
*
* @return string with value
*/
private function _kstat($key)
{
if ($m = shell_exec('kstat -p d ' . $key)) {
list($key, $value) = preg_split("/\t/", trim($m), 2);
return $value;
} else {
return '';
}
}
/**
* Gets load information
*
* @return array with load data
*/
public function loadavg()
{
$load1 = $this->_kstat('unix:0:system_misc:avenrun_1min');
return array('loadavg' => $load1);
}
/**
* Checks whether class is supported in this environment
*
* @return true on success
*/
public function supported()
{
return is_readable('/proc/meminfo');
}
/**
* Gets information about memory usage
*
* @return array with memory usage data
*/
public function memory()
{
$mem = array();
$pagesize = $this->_kstat('unix:0:seg_cache:slab_size');
$mem['MemTotal']
= $this->_kstat('unix:0:system_pages:pagestotal') * $pagesize;
$mem['MemUsed']
= $this->_kstat('unix:0:system_pages:pageslocked') * $pagesize;
$mem['MemFree']
= $this->_kstat('unix:0:system_pages:pagesfree') * $pagesize;
$mem['SwapTotal'] = $this->_kstat('unix:0:vminfo:swap_avail') / 1024;
$mem['SwapUsed'] = $this->_kstat('unix:0:vminfo:swap_alloc') / 1024;
$mem['SwapFree'] = $this->_kstat('unix:0:vminfo:swap_free') / 1024;
return $mem;
}
}
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