daemon: fallback automatically when pcntl_signal() is not present

[tt-rss.git] / update_daemon.php

diff --git a/update_daemon.php b/update_daemon.php
old mode 100644 (file)
new mode 100755 (executable)
index 9061a44..03d366b
--- a/update_daemon.php
+++ b/update_daemon.php
@@ -1,23 +1,65 @@
-#!/usr/bin/php4
-<?
+#!/usr/bin/php
+<?php
        // this daemon runs in the background and updates all feeds
        // continuously
 
-       define('SLEEP_INTERVAL', 10); // seconds
+       // define('DEFAULT_ERROR_LEVEL', E_ALL);
+       define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
 
-       // TODO: allow update scheduling from users
-
-       define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');
+       declare(ticks = 1);
 
        define('DISABLE_SESSIONS', true);
 
+       require_once "version.php";
+
+       if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) {
+               define('DAEMON_EXTENDED_DEBUG', true);
+       }
+
+       define('PURGE_INTERVAL', 3600); // seconds
+
        require_once "sanity_check.php";
        require_once "config.php";
+
+       if (!defined('PHP_EXECUTABLE')) {
+               define('PHP_EXECUTABLE', '/usr/bin/php');
+       }
+
+       if (!ENABLE_UPDATE_DAEMON) {
+               die("Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
+       }
+       
        require_once "db.php";
        require_once "db-prefs.php";
        require_once "functions.php";
-       require_once "magpierss/rss_fetch.inc";
 
+       error_reporting(DEFAULT_ERROR_LEVEL);
+
+       function sigint_handler() {
+               unlink(LOCK_DIRECTORY . "/update_daemon.lock");
+               die("Received SIGINT. Exiting.\n");
+       }
+
+       function sigalrm_handler() {
+               die("received SIGALRM, hang in feed update?\n");
+       }
+
+       if (function_exists('pcntl_signal')) {
+               pcntl_signal(SIGINT, sigint_handler);
+               pcntl_signal(SIGALRM, sigalrm_handler);
+       } else {
+               _debug("Warning: pcntl_signal function not present, continuing without support for signals.");  
+       }
+
+       $lock_handle = make_lockfile("update_daemon.lock");
+
+       if (!$lock_handle) {
+               die("error: Can't create lockfile ($lock_filename). ".
+                       "Maybe another daemon is already running.\n");
+       }
+
+       // Testing database connection.
+       // It is unnecessary to start the fork loop if database is not ok.
        $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); 
 
        if (!$link) {
@@ -28,61 +70,18 @@
                return;
        }
 
-       if (DB_TYPE == "pgsql") {
-               pg_query("set client_encoding = 'utf-8'");
-       }
+       db_close($link);
 
-       while (true) {
+       $last_purge = 0;
 
-               // FIXME: get all scheduled updates w/forced refetch
+       while (true) {
 
-#              $result = db_query($link, "SELECT * FROM ttrss_scheduled_updates ORDER BY id");
-#              while ($line = db_fetch_assoc($result)) {
-#                      print "Scheduled feed update: " . $line["feed_id"] . ", UID: " . 
-#                              $line["owner_uid"] . "\n";
-#              }
-       
-               // Process all other feeds using last_updated and interval parameters
+               passthru(PHP_EXECUTABLE . " update_daemon_loop.php SRV_RUN_OK");
 
-               $result = db_query($link, "SELECT feed_url,id,owner_uid,
-                       SUBSTRING(last_updated,1,19) AS last_updated,
-                       update_interval FROM ttrss_feeds ORDER BY last_updated DESC");
-       
-               while ($line = db_fetch_assoc($result)) {
-       
-                       print "Checking feed: " . $line["feed_url"] . "\n";
-       
-                       $upd_intl = $line["update_interval"];
-       
-                       $user_id = $line["owner_uid"];
-       
-                       if (!$upd_intl || $upd_intl == 0) {
-                               $upd_intl = get_pref($link, 'DEFAULT_UPDATE_INTERVAL', $user_id);
-                       }
-
-                       if ($upd_intl < 0) { 
-                               print "Updates disabled.\n";
-                               continue; 
-                       }
-       
-#                      printf("%d ? %d\n", time() - strtotime($line["last_updated"]) > $upd_intl*60,
-#                              $upd_intl*60);
-       
-                       if (!$line["last_updated"] || 
-                               time() - strtotime($line["last_updated"]) > ($upd_intl * 60)) {
-       
-                               print "Updating...\n";
-       
-                               update_rss_feed($link, $line["feed_url"], $line["id"], true);
-       
-                       }
-               }
-
-               print "Sleeping for " . SLEEP_INTERVAL . " seconds...\n";
+               _debug("Sleeping for " . DAEMON_SLEEP_INTERVAL . " seconds...");
                
-               sleep(SLEEP_INTERVAL);
+               sleep(DAEMON_SLEEP_INTERVAL);
        }
 
-       db_close($link);
 
 ?>