-#!/usr/bin/php
+#!/usr/bin/env 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
+ set_include_path(get_include_path() . PATH_SEPARATOR .
+ dirname(__FILE__) . "/include");
+
+ // This is an experimental multiprocess update daemon.
+ // Some configurable variable may be found below.
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);
+ }
+
+ define('PURGE_INTERVAL', 3600); // seconds
+ define('MAX_CHILD_RUNTIME', 600); // seconds
- require_once "config.php";
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";
+ require_once "lib/magpierss/rss_fetch.inc";
define('MAX_JOBS', 2);
- define('CLIENT_PROCESS', './update_daemon2_client.php SRV_RUN_OK');
define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL);
- $running_jobs = 0;
+ if (!function_exists('pcntl_fork')) {
+ die("error: This script requires PHP compiled with PCNTL module.\n");
+ }
+
+ $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) {
- 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 shutdown() {
+ if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock"))
+ unlink(LOCK_DIRECTORY . "/update_daemon.lock");
+ }
+
+ function task_shutdown() {
+ $pid = posix_getpid();
+
+ if (file_exists(LOCK_DIRECTORY . "/update_daemon-$pid.lock"))
+ unlink(LOCK_DIRECTORY . "/update_daemon-$pid.lock");
+ }
+
function sigint_handler() {
- unlink(LOCK_DIRECTORY . "/update_daemon.lock");
- die("Received SIGINT. Exiting.\n");
+ shutdown();
+ die("[SIGINT] removing lockfile and exiting.\n");
}
- pcntl_signal(SIGCHLD, 'sigchld_handler');
- pcntl_signal(SIGINT, 'sigint_handler');
+ function task_sigint_handler() {
+ task_shutdown();
+ die("[SIGINT] removing lockfile and exiting.\n");
+ }
- $lock_handle = make_lockfile("update_daemon.lock");
+ pcntl_signal(SIGCHLD, 'sigchld_handler');
- if (!$lock_handle) {
- die("error: Can't create lockfile ($lock_filename). ".
+ if (file_is_locked("update_daemon.lock")) {
+ die("error: Can't create lockfile. ".
"Maybe another daemon is already running.\n");
}
+ if (!pcntl_fork()) {
+ pcntl_signal(SIGINT, 'sigint_handler');
+ register_shutdown_function('shutdown');
+
+ // 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");
+ }
+
+ while (true) { sleep(100); }
+ }
+
+ // Testing database connection.
+ // It is unnecessary to start the fork loop if database is not ok.
+ $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME);
+
+ if (!init_connection($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();
- print "[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec\n";
+ if ($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()) {
- for ($j = $running_jobs; $j < MAX_JOBS; $j++) {
- print "[MASTER] spawning client $j...";
+ check_ctimes();
+ reap_children();
+
+ for ($j = count($children); $j < MAX_JOBS; $j++) {
$pid = pcntl_fork();
if ($pid == -1) {
die("fork failed!\n");
} else if ($pid) {
- $running_jobs++;
- print "OK [$running_jobs]\n";
+ _debug("[MASTER] spawned client $j [PID:$pid]...");
+ array_push($children, $pid);
+ $ctimes[$pid] = time();
} else {
pcntl_signal(SIGCHLD, SIG_IGN);
- pcntl_signal(SIGINT, SIG_DFL);
- passthru(CLIENT_PROCESS);
+ 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')) {
+ print "warning: unable to create stampfile";
+ }
+
+ // 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 $rc cached tags.");
+
+ _debug("Updating linked feeds...");
+ get_linked_feeds($link);
+
+ }
+
+ _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();
}
git.wh0rd.org / tt-rss.git / blobdiff