3 // This is an experimental multiprocess update daemon.
4 // Some configurable variable may be found below.
6 // define('DEFAULT_ERROR_LEVEL', E_ALL);
7 define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE
);
11 define('DISABLE_SESSIONS', true);
13 require_once "version.php";
15 if (strpos(VERSION
, ".99") !== false ||
getenv('DAEMON_XDEBUG')) {
16 define('DAEMON_EXTENDED_DEBUG', true);
19 define('PURGE_INTERVAL', 3600); // seconds
20 define('MAX_CHILD_RUNTIME', 600); // seconds
22 require_once "sanity_check.php";
23 require_once "config.php";
25 define('MAX_JOBS', 2);
26 define('SPAWN_INTERVAL', 1);
28 define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL
);
30 if (!function_exists('pcntl_fork')) {
31 die("error: This script requires PHP compiled with PCNTL module.\n");
34 if (!ENABLE_UPDATE_DAEMON
) {
35 die("error: Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
38 require_once "db.php";
39 require_once "db-prefs.php";
40 require_once "functions.php";
41 require_once "lib/magpierss/rss_fetch.inc";
43 error_reporting(DEFAULT_ERROR_LEVEL
);
48 $last_checkpoint = -1;
50 function reap_children() {
55 foreach ($children as $pid) {
56 if (pcntl_waitpid($pid, $status, WNOHANG
) != $pid) {
57 array_push($tmp, $pid);
59 _debug("[SIGCHLD] child $pid reaped.");
69 function check_ctimes() {
72 foreach (array_keys($ctimes) as $pid) {
73 $started = $ctimes[$pid];
75 if (time() - $started > MAX_CHILD_RUNTIME
) {
76 _debug("[MASTER] child process $pid seems to be stuck, aborting...");
77 posix_kill($pid, SIGINT
);
82 function sigchld_handler($signal) {
83 $running_jobs = reap_children();
85 _debug("[SIGCHLD] jobs left: $running_jobs");
87 pcntl_waitpid(-1, $status, WNOHANG
);
90 function sigint_handler() {
91 unlink(LOCK_DIRECTORY
. "/update_daemon.lock");
92 die("[SIGINT] removing lockfile and exiting.\n");
95 pcntl_signal(SIGCHLD
, 'sigchld_handler');
97 if (file_is_locked("update_daemon.lock")) {
98 die("error: Can't create lockfile. ".
99 "Maybe another daemon is already running.\n");
103 pcntl_signal(SIGINT
, 'sigint_handler');
105 // Try to lock a file in order to avoid concurrent update.
106 $lock_handle = make_lockfile("update_daemon.lock");
109 die("error: Can't create lockfile. ".
110 "Maybe another daemon is already running.\n");
113 while (true) { sleep(100); }
116 // Testing database connection.
117 // It is unnecessary to start the fork loop if database is not ok.
118 $link = db_connect(DB_HOST
, DB_USER
, DB_PASS
, DB_NAME
);
121 if (DB_TYPE
== "mysql") {
124 // PG seems to display its own errors just fine by default.
132 // Since sleep is interupted by SIGCHLD, we need another way to
133 // respect the SPAWN_INTERVAL
134 $next_spawn = $last_checkpoint + SPAWN_INTERVAL
- time();
136 if ($next_spawn %
10 == 0) {
137 $running_jobs = count($children);
138 _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec.");
141 if ($last_checkpoint + SPAWN_INTERVAL
< time()) {
146 for ($j = count($children); $j < MAX_JOBS
; $j++
) {
149 die("fork failed!\n");
151 _debug("[MASTER] spawned client $j [PID:$pid]...");
152 array_push($children, $pid);
153 $ctimes[$pid] = time();
155 pcntl_signal(SIGCHLD
, SIG_IGN
);
156 pcntl_signal(SIGINT
, SIG_DFL
);
158 // ****** Updating RSS code *******
159 // Only run in fork process.
161 $start_timestamp = time();
163 $link = db_connect(DB_HOST
, DB_USER
, DB_PASS
, DB_NAME
);
166 if (DB_TYPE
== "mysql") {
169 // PG seems to display its own errors just fine by default.
173 init_connection($link);
175 // We disable stamp file, since it is of no use in a multiprocess update.
176 // not really, tho for the time being -fox
177 if (!make_stampfile('update_daemon.stamp')) {
178 print "warning: unable to create stampfile";
181 // FIXME : $last_purge is of no use in a multiprocess update.
182 // FIXME : We ALWAYS purge old posts.
183 //_debug("Purging old posts (random 30 feeds)...");
184 //global_purge_old_posts($link, true, 30);
186 // Call to the feed batch update function
187 // or regenerate feedbrowser cache
189 if (rand(0,100) > 50) {
190 update_daemon_common($link);
192 $count = update_feedbrowser_cache($link);
193 _debug("Finished, $count feeds processed.");
196 _debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)");
201 // We wait a little before exiting to avoid to be faster than our parent process.
203 // We exit in order to avoid fork bombing.
207 // We wait a little time before the next fork, in order to let the first fork
208 // mark the feeds it update :
211 $last_checkpoint = time();