update_daemon.php

   1 #!/usr/bin/php
   2 <?php
   3         // this daemon runs in the background and updates all feeds
   4         // continuously
   5
   6         // define('DEFAULT_ERROR_LEVEL', E_ALL);
   7         define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
   8
   9         declare(ticks = 1);
  10
  11         define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');
  12         define('SIMPLEPIE_CACHE_DIR',   '/var/tmp/simplepie-ttrss-cache-daemon');
  13         define('DISABLE_SESSIONS', true);
  14
  15         require_once "version.php";
  16
  17         if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) {
  18                 define('DAEMON_EXTENDED_DEBUG', true);
  19         }
  20
  21         define('PURGE_INTERVAL', 3600); // seconds
  22
  23         require_once "sanity_check.php";
  24         require_once "config.php";
  25
  26         if (!defined('PHP_EXECUTABLE')) {
  27                 define('PHP_EXECUTABLE', '/usr/bin/php');
  28         }
  29
  30         if (!ENABLE_UPDATE_DAEMON) {
  31                 die("Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
  32         }
  33
  34         require_once "db.php";
  35         require_once "db-prefs.php";
  36         require_once "functions.php";
  37         require_once "magpierss/rss_fetch.inc";
  38
  39         error_reporting(DEFAULT_ERROR_LEVEL);
  40
  41         function sigint_handler() {
  42                 unlink(LOCK_DIRECTORY . "/update_daemon.lock");
  43                 die("Received SIGINT. Exiting.\n");
  44         }
  45
  46         function sigalrm_handler() {
  47                 die("received SIGALRM, hang in feed update?\n");
  48         }
  49
  50         pcntl_signal(SIGINT, sigint_handler);
  51         pcntl_signal(SIGALRM, sigalrm_handler);
  52
  53         $lock_handle = make_lockfile("update_daemon.lock");
  54
  55         if (!$lock_handle) {
  56                 die("error: Can't create lockfile ($lock_filename). ".
  57                         "Maybe another daemon is already running.\n");
  58         }
  59
  60         // Testing database connection.
  61         // It is unnecessary to start the fork loop if database is not ok.
  62         $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
  63
  64         if (!$link) {
  65                 if (DB_TYPE == "mysql") {
  66                         print mysql_error();
  67                 }
  68                 // PG seems to display its own errors just fine by default.
  69                 return;
  70         }
  71
  72         db_close($link);
  73
  74         $last_purge = 0;
  75
  76         while (true) {
  77
  78                 passthru(PHP_EXECUTABLE . " update_daemon_loop.php SRV_RUN_OK");
  79
  80                 _debug("Sleeping for " . DAEMON_SLEEP_INTERVAL . " seconds...");
  81
  82                 sleep(DAEMON_SLEEP_INTERVAL);
  83         }
  84
  85
  86 ?>