#!/usr/bin/php
<?php
- // This is an experimental multiprocess update daemon
- // It consists of the master server (this file) and
- // client batch script (update_daemon2_client.php) which
- // should only be run by the server process
+ // This is an experimental multiprocess update daemon.
+ // Some configurable variable may be found below.
+
+ // define('DEFAULT_ERROR_LEVEL', E_ALL);
+ define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE);
declare(ticks = 1);
+ define('MAGPIE_CACHE_DIR', '/var/tmp/magpie-ttrss-cache-daemon');
+ define('SIMPLEPIE_CACHE_DIR', '/var/tmp/simplepie-ttrss-cache-daemon');
+ 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";
- require_once "functions.php";
define('MAX_JOBS', 2);
- define('CLIENT_PROCESS', './update_daemon2_client.php SRV_RUN_OK');
+
define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL);
- define('PHP_EXECUTABLE', '/usr/bin/php');
- $running_jobs = 0;
+ if (!function_exists('pcntl_fork')) {
+ die("error: This script requires PHP compiled with PCNTL module.\n");
+ }
+
+ if (!ENABLE_UPDATE_DAEMON) {
+ die("error: 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 "lib/magpierss/rss_fetch.inc";
+
+ error_reporting(DEFAULT_ERROR_LEVEL);
+
+ $children = array();
+
$last_checkpoint = -1;
+ function reap_children() {
+ global $children;
+
+ $tmp = array();
+
+ foreach ($children as $pid) {
+ if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) {
+ array_push($tmp, $pid);
+ } else {
+ _debug("[SIGCHLD] child $pid reaped.");
+ }
+ }
+
+ $children = $tmp;
+
+ return count($tmp);
+ }
+
+ function sigalrm_handler() {
+ die("[SIGALRM] hang in feed update?\n");
+ }
+
function sigchld_handler($signal) {
- global $running_jobs;
- if ($running_jobs > 0) $running_jobs--;
- print posix_getpid() . ": SIGCHLD received, jobs left: $running_jobs\n";
+ $running_jobs = reap_children();
+
+ _debug("[SIGCHLD] jobs left: $running_jobs");
+
pcntl_waitpid(-1, $status, WNOHANG);
}
function sigint_handler() {
unlink(LOCK_DIRECTORY . "/update_daemon.lock");
- die("Received SIGINT. Exiting.\n");
+ die("[SIGINT] removing lockfile and exiting.\n");
}
+ pcntl_signal(SIGALRM, 'sigalrm_handler');
pcntl_signal(SIGCHLD, 'sigchld_handler');
- pcntl_signal(SIGINT, 'sigint_handler');
if (file_is_locked("update_daemon.lock")) {
die("error: Can't create lockfile. ".
}
if (!pcntl_fork()) {
+ pcntl_signal(SIGINT, 'sigint_handler');
+
+ // Try to lock a file in order to avoid concurrent update.
$lock_handle = make_lockfile("update_daemon.lock");
if (!$lock_handle) {
while (true) { sleep(100); }
}
+ // 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) {
+ if (DB_TYPE == "mysql") {
+ print mysql_error();
+ }
+ // PG seems to display its own errors just fine by default.
+ return;
+ }
+
+ db_close($link);
+
while (true) {
+ // Since sleep is interupted by SIGCHLD, we need another way to
+ // respect the SPAWN_INTERVAL
$next_spawn = $last_checkpoint + SPAWN_INTERVAL - time();
if ($next_spawn % 10 == 0) {
- print "[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec\n";
+ $running_jobs = count($children);
+ _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec.");
}
if ($last_checkpoint + SPAWN_INTERVAL < time()) {
- for ($j = $running_jobs; $j < MAX_JOBS; $j++) {
- print "[MASTER] spawning client $j...";
+ reap_children();
+
+ for ($j = count($children); $j < MAX_JOBS; $j++) {
$pid = pcntl_fork();
if ($pid == -1) {
die("fork failed!\n");
} else if ($pid) {
- $running_jobs++;
- print "OK [$running_jobs]\n";
+ _debug("[MASTER] spawned client $j [PID:$pid]...");
+ array_push($children, $pid);
} else {
pcntl_signal(SIGCHLD, SIG_IGN);
pcntl_signal(SIGINT, SIG_DFL);
- passthru(PHP_EXECUTABLE . ' ' . CLIENT_PROCESS);
+
+ // ****** Updating RSS code *******
+ // Only run in fork process.
+
+ $start_timestamp = time();
+
+ $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
+
+ if (!$link) {
+ if (DB_TYPE == "mysql") {
+ print mysql_error();
+ }
+ // PG seems to display its own errors just fine by default.
+ return;
+ }
+
+ init_connection($link);
+
+ // We disable stamp file, since it is of no use in a multiprocess update.
+ // not really, tho for the time being -fox
+ if (!make_stampfile('update_daemon.stamp')) {
+ print "warning: unable to create stampfile";
+ }
+
+ // FIXME : $last_purge is of no use in a multiprocess update.
+ // FIXME : We ALWAYS purge old posts.
+ //_debug("Purging old posts (random 30 feeds)...");
+ //global_purge_old_posts($link, true, 30);
+
+ // Call to the feed batch update function
+ // or regenerate feedbrowser cache
+
+ if (rand(0,100) > 50) {
+ update_daemon_common($link);
+ } else {
+ $count = update_feedbrowser_cache($link);
+ _debug("Finished, $count feeds processed.");
+ }
+
+ _debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)");
+
+ db_close($link);
+
+ // We are in a fork.
+ // We wait a little before exiting to avoid to be faster than our parent process.
+ sleep(1);
+ // We exit in order to avoid fork bombing.
exit(0);
}
+
+ // We wait a little time before the next fork, in order to let the first fork
+ // mark the feeds it update :
+ sleep(1);
}
$last_checkpoint = time();
}