friendica/src/Util/Pidfile.php

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<?php
/**
* @file src/Util/Pidfile.php
*/
namespace Friendica\Util;
/**
* @brief Pidfile class
*/
class Pidfile
{
private $file;
private $running;
/**
* @param string $dir path
* @param string $name filename
* @return void
*/
public function __construct($dir, $name)
{
$this->_file = "$dir/$name.pid";
if (file_exists($this->_file)) {
$pid = trim(@file_get_contents($this->file));
if (($pid != "") && posix_kill($pid, 0)) {
$this->running = true;
}
}
if (! $this->running) {
$pid = getmypid();
file_put_contents($this->file, $pid);
}
}
/**
* @return void
*/
public function __destruct()
{
if ((! $this->running) && file_exists($this->file)) {
@unlink($this->file);
}
}
/**
* @return boolean
*/
public static function isRunning()
{
return self::$running;
}
/**
* @return object
*/
public static function runningTime()
{
return time() - @filectime(self::$file);
}
/**
* @return boolean
*/
public static function kill()
{
if (file_exists(self::$file)) {
return posix_kill(file_get_contents(self::$file), SIGTERM);
}
}
}