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', DAEMON_SLEEP_INTERVAL
);
28 if (!function_exists('pcntl_fork')) {
29 die("error: This script requires PHP compiled with PCNTL module.\n");
32 if (!ENABLE_UPDATE_DAEMON
) {
33 die("error: Please enable option ENABLE_UPDATE_DAEMON in config.php\n");
36 require_once "db.php";
37 require_once "db-prefs.php";
38 require_once "functions.php";
39 require_once "lib/magpierss/rss_fetch.inc";
41 error_reporting(DEFAULT_ERROR_LEVEL
);
46 $last_checkpoint = -1;
48 function reap_children() {
54 foreach ($children as $pid) {
55 if (pcntl_waitpid($pid, $status, WNOHANG
) != $pid) {
57 if (file_is_locked("update_daemon-$pid.lock")) {
58 array_push($tmp, $pid);
60 _debug("[reap_children] child $pid seems active but lockfile is unlocked.");
63 _debug("[reap_children] child $pid reaped.");
73 function check_ctimes() {
76 foreach (array_keys($ctimes) as $pid) {
77 $started = $ctimes[$pid];
79 if (time() - $started > MAX_CHILD_RUNTIME
) {
80 _debug("[MASTER] child process $pid seems to be stuck, aborting...");
81 posix_kill($pid, SIGKILL
);
86 function sigchld_handler($signal) {
87 $running_jobs = reap_children();
89 _debug("[SIGCHLD] jobs left: $running_jobs");
91 pcntl_waitpid(-1, $status, WNOHANG
);
95 if (file_exists(LOCK_DIRECTORY
. "/update_daemon.lock"))
96 unlink(LOCK_DIRECTORY
. "/update_daemon.lock");
99 function task_shutdown() {
100 $pid = posix_getpid();
102 if (file_exists(LOCK_DIRECTORY
. "/update_daemon-$pid.lock"))
103 unlink(LOCK_DIRECTORY
. "/update_daemon-$pid.lock");
106 function sigint_handler() {
108 die("[SIGINT] removing lockfile and exiting.\n");
111 function task_sigint_handler() {
113 die("[SIGINT] removing lockfile and exiting.\n");
116 pcntl_signal(SIGCHLD
, 'sigchld_handler');
118 if (file_is_locked("update_daemon.lock")) {
119 die("error: Can't create lockfile. ".
120 "Maybe another daemon is already running.\n");
124 pcntl_signal(SIGINT
, 'sigint_handler');
125 register_shutdown_function('shutdown');
127 // Try to lock a file in order to avoid concurrent update.
128 $lock_handle = make_lockfile("update_daemon.lock");
131 die("error: Can't create lockfile. ".
132 "Maybe another daemon is already running.\n");
135 while (true) { sleep(100); }
138 // Testing database connection.
139 // It is unnecessary to start the fork loop if database is not ok.
140 $link = db_connect(DB_HOST
, DB_USER
, DB_PASS
, DB_NAME
);
143 if (DB_TYPE
== "mysql") {
146 // PG seems to display its own errors just fine by default.
154 // Since sleep is interupted by SIGCHLD, we need another way to
155 // respect the SPAWN_INTERVAL
156 $next_spawn = $last_checkpoint + SPAWN_INTERVAL
- time();
158 if ($next_spawn %
10 == 0) {
159 $running_jobs = count($children);
160 _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec.");
163 if ($last_checkpoint + SPAWN_INTERVAL
< time()) {
168 for ($j = count($children); $j < MAX_JOBS
; $j++
) {
171 die("fork failed!\n");
173 _debug("[MASTER] spawned client $j [PID:$pid]...");
174 array_push($children, $pid);
175 $ctimes[$pid] = time();
177 pcntl_signal(SIGCHLD
, SIG_IGN
);
178 pcntl_signal(SIGINT
, 'task_sigint_handler');
180 register_shutdown_function('task_shutdown');
182 $my_pid = posix_getpid();
183 $lock_filename = "update_daemon-$my_pid.lock";
185 $lock_handle = make_lockfile($lock_filename);
188 die("error: Can't create lockfile ($lock_filename). ".
189 "Maybe another daemon is already running.\n");
192 // ****** Updating RSS code *******
193 // Only run in fork process.
195 $start_timestamp = time();
197 $link = db_connect(DB_HOST
, DB_USER
, DB_PASS
, DB_NAME
);
200 if (DB_TYPE
== "mysql") {
203 // PG seems to display its own errors just fine by default.
207 init_connection($link);
209 // We disable stamp file, since it is of no use in a multiprocess update.
210 // not really, tho for the time being -fox
211 if (!make_stampfile('update_daemon.stamp')) {
212 print "warning: unable to create stampfile";
215 // Call to the feed batch update function
216 // or regenerate feedbrowser cache
218 if (rand(0,100) > 30) {
219 update_daemon_common($link);
221 $count = update_feedbrowser_cache($link);
222 _debug("Finished, $count feeds processed.");
225 _debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)");
230 // We wait a little before exiting to avoid to be faster than our parent process.
233 unlink(LOCK_DIRECTORY
. "/$lock_filename");
235 // We exit in order to avoid fork bombing.
239 // We wait a little time before the next fork, in order to let the first fork
240 // mark the feeds it update :
243 $last_checkpoint = time();