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- #!/usr/bin/env php
- <?php
- set_include_path(dirname(__FILE__) ."/include" . PATH_SEPARATOR .
- get_include_path());
- declare(ticks = 1);
- chdir(dirname(__FILE__));
- define('DISABLE_SESSIONS', true);
- require_once "version.php";
- if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) {
- define('DAEMON_EXTENDED_DEBUG', true);
- }
- require_once "functions.php";
- require_once "rssfuncs.php";
- require_once "sanity_check.php";
- require_once "config.php";
- require_once "db.php";
- require_once "db-prefs.php";
- // defaults
- define('PURGE_INTERVAL', 3600); // seconds
- define('MAX_CHILD_RUNTIME', 600); // seconds
- define('MAX_JOBS', 2);
- define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL); // seconds
- if (!function_exists('pcntl_fork')) {
- die("error: This script requires PHP compiled with PCNTL module.\n");
- }
- $master_handlers_installed = false;
- $children = array();
- $ctimes = array();
- $last_checkpoint = -1;
- function reap_children() {
- global $children;
- global $ctimes;
- $tmp = array();
- foreach ($children as $pid) {
- if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) {
- if (file_is_locked("update_daemon-$pid.lock")) {
- array_push($tmp, $pid);
- } else {
- _debug("[reap_children] child $pid seems active but lockfile is unlocked.");
- unset($ctimes[$pid]);
- }
- } else {
- _debug("[reap_children] child $pid reaped.");
- unset($ctimes[$pid]);
- }
- }
- $children = $tmp;
- return count($tmp);
- }
- function check_ctimes() {
- global $ctimes;
- foreach (array_keys($ctimes) as $pid) {
- $started = $ctimes[$pid];
- if (time() - $started > MAX_CHILD_RUNTIME) {
- _debug("[MASTER] child process $pid seems to be stuck, aborting...");
- posix_kill($pid, SIGKILL);
- }
- }
- }
- function sigchld_handler($signal) {
- $running_jobs = reap_children();
- _debug("[SIGCHLD] jobs left: $running_jobs");
- pcntl_waitpid(-1, $status, WNOHANG);
- }
- function shutdown($caller_pid) {
- if ($caller_pid == posix_getpid()) {
- if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) {
- _debug("removing lockfile (master)...");
- unlink(LOCK_DIRECTORY . "/update_daemon.lock");
- }
- }
- }
- function task_shutdown() {
- $pid = posix_getpid();
- if (file_exists(LOCK_DIRECTORY . "/update_daemon-$pid.lock")) {
- _debug("removing lockfile ($pid)...");
- unlink(LOCK_DIRECTORY . "/update_daemon-$pid.lock");
- }
- }
- function sigint_handler() {
- _debug("[MASTER] SIG_INT received.\n");
- shutdown(posix_getpid());
- die;
- }
- function task_sigint_handler() {
- _debug("[TASK] SIG_INT received.\n");
- task_shutdown();
- die;
- }
- pcntl_signal(SIGCHLD, 'sigchld_handler');
- $longopts = array("log:",
- "tasks:",
- "interval",
- "quiet",
- "help");
- $options = getopt("", $longopts);
- if (isset($options["help"]) ) {
- print "Tiny Tiny RSS update daemon.\n\n";
- print "Options:\n";
- print " --log FILE - log messages to FILE\n";
- print " --tasks N - amount of update tasks to spawn\n";
- print " default: " . MAX_JOBS . "\n";
- print " --interval N - task spawn interval\n";
- print " default: " . SPAWN_INTERVAL . " seconds.\n";
- print " --quiet - don't output messages to stdout\n";
- return;
- }
- define('QUIET', isset($options['quiet']));
- if (isset($options["tasks"])) {
- _debug("Set to spawn " . $options["tasks"] . " children.");
- $max_jobs = $option["tasks"];
- } else {
- $max_jobs = MAX_JOBS;
- }
- if (isset($options["interval"])) {
- _debug("Spawn interval: " . $options["interval"] . " seconds.");
- $spawn_interval = $option["interval"];
- } else {
- $spawn_interval = SPAWN_INTERVAL;
- }
- if (isset($options["log"])) {
- _debug("Logging to " . $options["log"]);
- define('LOGFILE', $options["log"]);
- }
- if (file_is_locked("update_daemon.lock")) {
- die("error: Can't create lockfile. ".
- "Maybe another daemon is already running.\n");
- }
- // Try to lock a file in order to avoid concurrent update.
- $lock_handle = make_lockfile("update_daemon.lock");
- if (!$lock_handle) {
- die("error: Can't create lockfile. ".
- "Maybe another daemon is already running.\n");
- }
- // Testing database connection.
- // It is unnecessary to start the fork loop if database is not ok.
- $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
- if (!init_connection($link)) 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) {
- $running_jobs = count($children);
- _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec.");
- }
- if ($last_checkpoint + $spawn_interval < time()) {
- check_ctimes();
- reap_children();
- for ($j = count($children); $j < $max_jobs; $j++) {
- $pid = pcntl_fork();
- if ($pid == -1) {
- die("fork failed!\n");
- } else if ($pid) {
- if (!$master_handlers_installed) {
- _debug("[MASTER] installing shutdown handlers");
- pcntl_signal(SIGINT, 'sigint_handler');
- register_shutdown_function('shutdown', posix_getpid());
- $master_handlers_installed = true;
- }
- _debug("[MASTER] spawned client $j [PID:$pid]...");
- array_push($children, $pid);
- $ctimes[$pid] = time();
- } else {
- pcntl_signal(SIGCHLD, SIG_IGN);
- pcntl_signal(SIGINT, 'task_sigint_handler');
- register_shutdown_function('task_shutdown');
- $my_pid = posix_getpid();
- $lock_filename = "update_daemon-$my_pid.lock";
- $lock_handle = make_lockfile($lock_filename);
- if (!$lock_handle) {
- die("error: Can't create lockfile ($lock_filename). ".
- "Maybe another daemon is already running.\n");
- }
- // ****** Updating RSS code *******
- // Only run in fork process.
- $start_timestamp = time();
- $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
- if (!init_connection($link)) return;
- // 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')) {
- die("error: unable to create stampfile\n");
- }
- // Call to the feed batch update function
- // or regenerate feedbrowser cache
- if (rand(0,100) > 30) {
- update_daemon_common($link);
- } else {
- $count = update_feedbrowser_cache($link);
- _debug("Feedbrowser updated, $count feeds processed.");
- purge_orphans($link, true);
- $rc = cleanup_tags($link, 14, 50000);
- _debug("Cleaned $rc cached tags.");
- global $pluginhost;
- $pluginhost->run_hooks($pluginhost::HOOK_UPDATE_TASK, "hook_update_task", $op);
- }
- _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);
- unlink(LOCK_DIRECTORY . "/$lock_filename");
- // 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();
- }
- sleep(1);
- }
- ?>
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