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<?php
/**
* @copyright Copyright (c) 2016 Bjoern Schiessle <bjoern@schiessle.org>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\ServerInfo;
use OC\Files\View;
use OC\Installer;
use OCP\IConfig;
use OCP\App\IAppManager;
use bantu\IniGetWrapper\IniGetWrapper;
class SystemStatistics {
/** @var IConfig */
private $config;
/** @var View view on data/ */
private $view;
/** @var IAppManager */
private $appManager;
/** @var Installer */
private $installer;
/** @var IniGetWrapper */
protected $phpIni;
/**
* SystemStatistics constructor.
*
* @param IConfig $config
* @param IAppManager $appManager
* @param Installer $installer
* @param IniGetWrapper $phpIni
* @throws \Exception
*/
public function __construct(IConfig $config, IAppManager $appManager, Installer $installer, IniGetWrapper $phpIni) {
$this->config = $config;
$this->view = new View();
$this->appManager = $appManager;
$this->installer = $installer;
$this->phpIni = $phpIni;
}
/**
* Get statistics about the system
*
* @return array with with of data
* @throws \OCP\Files\InvalidPathException
*/
public function getSystemStatistics() {
$processorUsage = $this->getProcessorUsage();
$memoryUsage = $this->getMemoryUsage();
return [
'version' => $this->config->getSystemValue('version'),
'theme' => $this->config->getSystemValue('theme', 'none'),
'enable_avatars' => $this->config->getSystemValue('enable_avatars', true) ? 'yes' : 'no',
'enable_previews' => $this->config->getSystemValue('enable_previews', true) ? 'yes' : 'no',
'memcache.local' => $this->config->getSystemValue('memcache.local', 'none'),
'memcache.distributed' => $this->config->getSystemValue('memcache.distributed', 'none'),
'filelocking.enabled' => $this->config->getSystemValue('filelocking.enabled', true) ? 'yes' : 'no',
'memcache.locking' => $this->config->getSystemValue('memcache.locking', 'none'),
'debug' => $this->config->getSystemValue('debug', false) ? 'yes' : 'no',
'freespace' => $this->view->free_space(),
'cpuload' => $processorUsage['loadavg'],
'mem_total' => $memoryUsage['mem_total'],
'mem_free' => $memoryUsage['mem_free'],
'swap_total' => $memoryUsage['swap_total'],
'swap_free' => $memoryUsage['swap_free'],
'apps' => $this->getAppsInfo()
];
}
/**
* Get available and free memory including both RAM and Swap
*
* @return array with the two values 'mem_free' and 'mem_total'
*/
protected function getMemoryUsage() {
$memoryUsage = false;
if (@is_readable('/proc/meminfo')) {
// read meminfo from OS
$memoryUsage = file_get_contents('/proc/meminfo');
}
//If FreeBSD is used and exec()-usage is allowed
if (PHP_OS === 'FreeBSD' && $this->is_function_enabled('exec')) {
//Read Swap usage:
exec("/usr/sbin/swapinfo", $return, $status);
if ($status === 0 && count($return) > 1) {
$line = preg_split("/[\s]+/", $return[1]);
if(count($line) > 3) {
$swapTotal = (int)$line[3];
$swapFree = $swapTotal - (int)$line[2];
}
}
unset($status);
unset($return);
//Read Memory Usage
exec("/sbin/sysctl -n hw.physmem hw.pagesize vm.stats.vm.v_inactive_count vm.stats.vm.v_cache_count vm.stats.vm.v_free_count", $return, $status);
if ($status === 0) {
$return = array_map('intval', $return);
if ($return === array_filter($return, 'is_int')) {
return [
'mem_total' => (int)$return[0]/1024,
'mem_free' => (int)$return[1] * ($return[2] + $return[3] + $return[4]) / 1024,
'swap_free' => (isset($swapFree)) ? $swapFree : 'N/A',
'swap_total' => (isset($swapTotal)) ? $swapTotal : 'N/A'
];
}
}
}
// check if determining memoryUsage failed
if ($memoryUsage === false) {
return ['mem_free' => 'N/A', 'mem_total' => 'N/A', 'swap_free' => 'N/A', 'swap_total' => 'N/A'];
}
$array = explode(PHP_EOL, $memoryUsage);
// the last value is a empty string after explode, skip it
$values = array_slice($array, 0, count($array) - 1);
$data = [];
foreach($values as $value) {
list($k, $v) = preg_split('/[\s:]+/', $value);
$data[$k] = $v;
}
if (array_key_exists('MemAvailable', $data)) {
// MemAvailable is only present in newer kernels (after 2014).
$available = $data['MemAvailable'];
} else {
$available = $data['MemFree'];
}
return [
'mem_free' => (int)$available,
'mem_total' => (int)$data['MemTotal'],
'swap_free' => (int)$data['SwapFree'],
'swap_total' => (int)$data['SwapTotal']
];
}
/**
* Get some info about installed apps, including available updates.
*
* @return array data about apps
*/
protected function getAppsInfo() {
// sekeleton about the data we return back
$info = [
'num_installed' => 0,
'num_updates_available' => 0,
'app_updates' => [],
];
// load all apps
$apps = $this->appManager->getInstalledApps();
$info['num_installed'] = \count($apps);
// iteriate through all installed apps.
foreach($apps as $appId) {
// check if there is any new version available for that specific app
$newVersion = $this->installer->isUpdateAvailable($appId);
if ($newVersion) {
// new version available, count up and tell which version.
$info['num_updates_available']++;
$info['app_updates'][$appId] = $newVersion;
}
}
return $info;
}
/**
* Checks if a function is available. Borrowed from
* https://github.com/nextcloud/server/blob/2e36069e24406455ad3f3998aa25e2a949d1402a/lib/private/legacy/helper.php#L475
*
* @param string $function_name
* @return bool
*/
public function is_function_enabled($function_name) {
if (!function_exists($function_name)) {
return false;
}
if ($this->phpIni->listContains('disable_functions', $function_name)) {
return false;
}
return true;
}
/**
* Get current CPU load average
*
* @return array load average with three values, 1/5/15 minutes average.
*/
protected function getProcessorUsage() {
// get current system load average.
$loadavg = sys_getloadavg();
// check if we got any values back.
if (!(is_array($loadavg) && count($loadavg) === 3)) {
// either no array or too few array keys.
// returning back zeroes to prevent any errors on JS side.
$loadavg = 'N/A';
}
return [
'loadavg' => $loadavg
];
}
}
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