293 lines
7.2 KiB
PHP
Executable File
293 lines
7.2 KiB
PHP
Executable File
#!/usr/bin/env php
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<?php
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set_include_path(dirname(__FILE__) ."/include" . PATH_SEPARATOR .
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get_include_path());
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declare(ticks = 1);
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chdir(dirname(__FILE__));
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define('DISABLE_SESSIONS', true);
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require_once "version.php";
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if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) {
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define('DAEMON_EXTENDED_DEBUG', true);
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}
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require_once "functions.php";
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require_once "rssfuncs.php";
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require_once "sanity_check.php";
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require_once "config.php";
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require_once "db.php";
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require_once "db-prefs.php";
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// defaults
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define('PURGE_INTERVAL', 3600); // seconds
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define('MAX_CHILD_RUNTIME', 600); // seconds
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define('MAX_JOBS', 2);
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define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL); // seconds
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if (!function_exists('pcntl_fork')) {
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die("error: This script requires PHP compiled with PCNTL module.\n");
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}
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$master_handlers_installed = false;
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$children = array();
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$ctimes = array();
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$last_checkpoint = -1;
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function reap_children() {
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global $children;
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global $ctimes;
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$tmp = array();
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foreach ($children as $pid) {
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if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) {
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if (file_is_locked("update_daemon-$pid.lock")) {
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array_push($tmp, $pid);
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} else {
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_debug("[reap_children] child $pid seems active but lockfile is unlocked.");
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unset($ctimes[$pid]);
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}
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} else {
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_debug("[reap_children] child $pid reaped.");
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unset($ctimes[$pid]);
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}
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}
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$children = $tmp;
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return count($tmp);
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}
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function check_ctimes() {
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global $ctimes;
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foreach (array_keys($ctimes) as $pid) {
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$started = $ctimes[$pid];
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if (time() - $started > MAX_CHILD_RUNTIME) {
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_debug("[MASTER] child process $pid seems to be stuck, aborting...");
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posix_kill($pid, SIGKILL);
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}
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}
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}
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function sigchld_handler($signal) {
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$running_jobs = reap_children();
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_debug("[SIGCHLD] jobs left: $running_jobs");
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pcntl_waitpid(-1, $status, WNOHANG);
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}
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function shutdown($caller_pid) {
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if ($caller_pid == posix_getpid()) {
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if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) {
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_debug("removing lockfile (master)...");
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unlink(LOCK_DIRECTORY . "/update_daemon.lock");
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}
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}
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}
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function task_shutdown() {
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$pid = posix_getpid();
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if (file_exists(LOCK_DIRECTORY . "/update_daemon-$pid.lock")) {
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_debug("removing lockfile ($pid)...");
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unlink(LOCK_DIRECTORY . "/update_daemon-$pid.lock");
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}
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}
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function sigint_handler() {
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_debug("[MASTER] SIG_INT received.\n");
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shutdown(posix_getpid());
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die;
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}
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function task_sigint_handler() {
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_debug("[TASK] SIG_INT received.\n");
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task_shutdown();
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die;
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}
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pcntl_signal(SIGCHLD, 'sigchld_handler');
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$longopts = array("log:",
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"tasks:",
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"interval",
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"quiet",
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"help");
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$options = getopt("", $longopts);
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if (isset($options["help"]) ) {
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print "Tiny Tiny RSS update daemon.\n\n";
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print "Options:\n";
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print " --log FILE - log messages to FILE\n";
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print " --tasks N - amount of update tasks to spawn\n";
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print " default: " . MAX_JOBS . "\n";
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print " --interval N - task spawn interval\n";
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print " default: " . SPAWN_INTERVAL . " seconds.\n";
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print " --quiet - don't output messages to stdout\n";
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return;
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}
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define('QUIET', isset($options['quiet']));
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if (isset($options["tasks"])) {
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_debug("Set to spawn " . $options["tasks"] . " children.");
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$max_jobs = $option["tasks"];
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} else {
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$max_jobs = MAX_JOBS;
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}
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if (isset($options["interval"])) {
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_debug("Spawn interval: " . $options["interval"] . " seconds.");
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$spawn_interval = $option["interval"];
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} else {
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$spawn_interval = SPAWN_INTERVAL;
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}
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if (isset($options["log"])) {
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_debug("Logging to " . $options["log"]);
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define('LOGFILE', $options["log"]);
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}
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if (file_is_locked("update_daemon.lock")) {
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die("error: Can't create lockfile. ".
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"Maybe another daemon is already running.\n");
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}
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// Try to lock a file in order to avoid concurrent update.
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$lock_handle = make_lockfile("update_daemon.lock");
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if (!$lock_handle) {
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die("error: Can't create lockfile. ".
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"Maybe another daemon is already running.\n");
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}
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// Testing database connection.
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// It is unnecessary to start the fork loop if database is not ok.
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$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
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if (!init_connection($link)) return;
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db_close($link);
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while (true) {
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// Since sleep is interupted by SIGCHLD, we need another way to
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// respect the spawn interval
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$next_spawn = $last_checkpoint + $spawn_interval - time();
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if ($next_spawn % 60 == 0) {
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$running_jobs = count($children);
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_debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec.");
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}
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if ($last_checkpoint + $spawn_interval < time()) {
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check_ctimes();
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reap_children();
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for ($j = count($children); $j < $max_jobs; $j++) {
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$pid = pcntl_fork();
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if ($pid == -1) {
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die("fork failed!\n");
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} else if ($pid) {
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if (!$master_handlers_installed) {
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_debug("[MASTER] installing shutdown handlers");
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pcntl_signal(SIGINT, 'sigint_handler');
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register_shutdown_function('shutdown', posix_getpid());
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$master_handlers_installed = true;
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}
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_debug("[MASTER] spawned client $j [PID:$pid]...");
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array_push($children, $pid);
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$ctimes[$pid] = time();
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} else {
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pcntl_signal(SIGCHLD, SIG_IGN);
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pcntl_signal(SIGINT, 'task_sigint_handler');
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register_shutdown_function('task_shutdown');
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$my_pid = posix_getpid();
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$lock_filename = "update_daemon-$my_pid.lock";
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$lock_handle = make_lockfile($lock_filename);
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if (!$lock_handle) {
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die("error: Can't create lockfile ($lock_filename). ".
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"Maybe another daemon is already running.\n");
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}
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// ****** Updating RSS code *******
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// Only run in fork process.
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$start_timestamp = time();
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$link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
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if (!init_connection($link)) return;
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// We disable stamp file, since it is of no use in a multiprocess update.
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// not really, tho for the time being -fox
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if (!make_stampfile('update_daemon.stamp')) {
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_debug("warning: unable to create stampfile\n");
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}
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// Call to the feed batch update function
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// or regenerate feedbrowser cache
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$nf = 0;
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if (rand(0,100) > 30) {
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_debug("Waiting before update..");
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sleep(rand(5,15));
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$nf = update_daemon_common($link);
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} else {
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$count = update_feedbrowser_cache($link);
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_debug("Feedbrowser updated, $count feeds processed.");
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purge_orphans($link, true);
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$rc = cleanup_tags($link, 14, 50000);
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_debug("Cleaned $rc cached tags.");
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global $pluginhost;
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$pluginhost->run_hooks($pluginhost::HOOK_UPDATE_TASK, "hook_update_task", $op);
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}
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_debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)");
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if ($nf > 0) {
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_debug("Feeds processed: $nf; feeds/minute: " . sprintf("%.2d", $nf/((time()-$start_timestamp)/60)));
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}
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db_close($link);
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// We are in a fork.
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// We wait a little before exiting to avoid to be faster than our parent process.
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sleep(1);
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unlink(LOCK_DIRECTORY . "/$lock_filename");
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// We exit in order to avoid fork bombing.
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exit(0);
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}
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}
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$last_checkpoint = time();
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}
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sleep(1);
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}
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?>
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