src/Util/Pidfile.php

   1 <?php
   2 /**
   3  * @file src/Util/Pidfile.php
   4  */
   5 namespace Friendica\Util;
   6
   7 /**
   8  * @brief Pidfile class
   9  */
  10 class Pidfile
  11 {
  12         private $file;
  13         private $running;
  14
  15         /**
  16          * @param string $dir  path
  17          * @param string $name filename
  18          * @return void
  19          */
  20         public function __construct($dir, $name)
  21         {
  22                 $this->_file = "$dir/$name.pid";
  23
  24                 if (file_exists($this->_file)) {
  25                         $pid = trim(@file_get_contents($this->file));
  26                         if (($pid != "") && posix_kill($pid, 0)) {
  27                                 $this->running = true;
  28                         }
  29                 }
  30
  31                 if (! $this->running) {
  32                         $pid = getmypid();
  33                         file_put_contents($this->file, $pid);
  34                 }
  35         }
  36
  37         /**
  38          * @return void
  39          */
  40         public function __destruct()
  41         {
  42                 if ((! $this->running) && file_exists($this->file)) {
  43                         @unlink($this->file);
  44                 }
  45         }
  46
  47         /**
  48          * @return boolean
  49          */
  50         public static function isRunning()
  51         {
  52                 return self::$running;
  53         }
  54
  55         /**
  56          * @return object
  57          */
  58         public static function runningTime()
  59         {
  60                 return time() - @filectime(self::$file);
  61         }
  62
  63         /**
  64          * @return boolean
  65          */
  66         public static function kill()
  67         {
  68                 if (file_exists(self::$file)) {
  69                         return posix_kill(file_get_contents(self::$file), SIGTERM);
  70                 }
  71         }
  72 }