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<?php
declare(strict_types=1);
namespace PhpMyAdmin\Server\SysInfo;
use function array_combine;
use function array_merge;
use function file_get_contents;
use function intval;
use function is_array;
use function is_readable;
use function mb_strpos;
use function mb_substr;
use function preg_match_all;
use function preg_split;
/**
* Linux based SysInfo class
*/
class Linux extends Base
{
/**
* The OS name
*
* @var string
*/
public $os = 'Linux';
/**
* Gets load information
*
* @return array<string, int> with load data
*/
public function loadavg()
{
$buf = file_get_contents('/proc/stat');
if ($buf === false) {
$buf = '';
}
$pos = mb_strpos($buf, "\n");
if ($pos === false) {
$pos = 0;
}
$nums = preg_split(
'/\s+/',
mb_substr(
$buf,
0,
$pos
)
);
if (! is_array($nums)) {
return ['busy' => 0, 'idle' => 0];
}
return [
'busy' => (int) $nums[1] + (int) $nums[2] + (int) $nums[3],
'idle' => (int) $nums[4],
];
}
/**
* Checks whether class is supported in this environment
*/
public function supported(): bool
{
return @is_readable('/proc/meminfo') && @is_readable('/proc/stat');
}
/**
* Gets information about memory usage
*
* @return array with memory usage data
*/
public function memory()
{
$content = @file_get_contents('/proc/meminfo');
if ($content === false) {
return [];
}
preg_match_all(SysInfo::MEMORY_REGEXP, $content, $matches);
/** @var array<string, int>|false $mem */
$mem = array_combine($matches[1], $matches[2]);
if ($mem === false) {
return [];
}
$defaults = [
'MemTotal' => 0,
'MemFree' => 0,
'Cached' => 0,
'Buffers' => 0,
'SwapTotal' => 0,
'SwapFree' => 0,
'SwapCached' => 0,
];
$mem = array_merge($defaults, $mem);
foreach ($mem as $idx => $value) {
$mem[$idx] = intval($value);
}
$mem['MemUsed'] = $mem['MemTotal'] - $mem['MemFree'] - $mem['Cached'] - $mem['Buffers'];
$mem['SwapUsed'] = $mem['SwapTotal'] - $mem['SwapFree'] - $mem['SwapCached'];
return $mem;
}
}
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