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1 | #!/usr/bin/env php | |
2 | <?php | |
3 | set_include_path(dirname(__FILE__) ."/include" . PATH_SEPARATOR . | |
4 | get_include_path()); | |
5 | ||
6 | declare(ticks = 1); | |
7 | chdir(dirname(__FILE__)); | |
8 | ||
9 | define('DISABLE_SESSIONS', true); | |
10 | ||
11 | require_once "version.php"; | |
12 | ||
13 | if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) { | |
14 | define('DAEMON_EXTENDED_DEBUG', true); | |
15 | } | |
16 | ||
17 | define('PURGE_INTERVAL', 3600); // seconds | |
18 | define('MAX_CHILD_RUNTIME', 600); // seconds | |
19 | ||
20 | require_once "functions.php"; | |
21 | require_once "rssfuncs.php"; | |
22 | require_once "sanity_check.php"; | |
23 | require_once "config.php"; | |
24 | require_once "db.php"; | |
25 | require_once "db-prefs.php"; | |
26 | ||
27 | define('MAX_JOBS', 2); | |
28 | define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL); | |
29 | ||
30 | if (!function_exists('pcntl_fork')) { | |
31 | die("error: This script requires PHP compiled with PCNTL module.\n"); | |
32 | } | |
33 | ||
34 | $children = array(); | |
35 | $ctimes = array(); | |
36 | ||
37 | $last_checkpoint = -1; | |
38 | ||
39 | function reap_children() { | |
40 | global $children; | |
41 | global $ctimes; | |
42 | ||
43 | $tmp = array(); | |
44 | ||
45 | foreach ($children as $pid) { | |
46 | if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) { | |
47 | ||
48 | if (file_is_locked("update_daemon-$pid.lock")) { | |
49 | array_push($tmp, $pid); | |
50 | } else { | |
51 | _debug("[reap_children] child $pid seems active but lockfile is unlocked."); | |
52 | unset($ctimes[$pid]); | |
53 | ||
54 | } | |
55 | } else { | |
56 | _debug("[reap_children] child $pid reaped."); | |
57 | unset($ctimes[$pid]); | |
58 | } | |
59 | } | |
60 | ||
61 | $children = $tmp; | |
62 | ||
63 | return count($tmp); | |
64 | } | |
65 | ||
66 | function check_ctimes() { | |
67 | global $ctimes; | |
68 | ||
69 | foreach (array_keys($ctimes) as $pid) { | |
70 | $started = $ctimes[$pid]; | |
71 | ||
72 | if (time() - $started > MAX_CHILD_RUNTIME) { | |
73 | _debug("[MASTER] child process $pid seems to be stuck, aborting..."); | |
74 | posix_kill($pid, SIGKILL); | |
75 | } | |
76 | } | |
77 | } | |
78 | ||
79 | function sigchld_handler($signal) { | |
80 | $running_jobs = reap_children(); | |
81 | ||
82 | _debug("[SIGCHLD] jobs left: $running_jobs"); | |
83 | ||
84 | pcntl_waitpid(-1, $status, WNOHANG); | |
85 | } | |
86 | ||
87 | function shutdown() { | |
88 | if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) | |
89 | unlink(LOCK_DIRECTORY . "/update_daemon.lock"); | |
90 | } | |
91 | ||
92 | function task_shutdown() { | |
93 | $pid = posix_getpid(); | |
94 | ||
95 | if (file_exists(LOCK_DIRECTORY . "/update_daemon-$pid.lock")) | |
96 | unlink(LOCK_DIRECTORY . "/update_daemon-$pid.lock"); | |
97 | } | |
98 | ||
99 | function sigint_handler() { | |
100 | shutdown(); | |
101 | die("[SIGINT] removing lockfile and exiting.\n"); | |
102 | } | |
103 | ||
104 | function task_sigint_handler() { | |
105 | task_shutdown(); | |
106 | die("[SIGINT] removing lockfile and exiting.\n"); | |
107 | } | |
108 | ||
109 | pcntl_signal(SIGCHLD, 'sigchld_handler'); | |
110 | ||
111 | if (file_is_locked("update_daemon.lock")) { | |
112 | die("error: Can't create lockfile. ". | |
113 | "Maybe another daemon is already running.\n"); | |
114 | } | |
115 | ||
116 | /* if (!pcntl_fork()) { | |
117 | pcntl_signal(SIGINT, 'sigint_handler'); | |
118 | register_shutdown_function('shutdown'); | |
119 | ||
120 | // Try to lock a file in order to avoid concurrent update. | |
121 | $lock_handle = make_lockfile("update_daemon.lock"); | |
122 | ||
123 | if (!$lock_handle) { | |
124 | die("error: Can't create lockfile. ". | |
125 | "Maybe another daemon is already running.\n"); | |
126 | } | |
127 | ||
128 | while (true) { sleep(100); } | |
129 | } */ | |
130 | ||
131 | // Testing database connection. | |
132 | // It is unnecessary to start the fork loop if database is not ok. | |
133 | $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); | |
134 | ||
135 | if (!init_connection($link)) return; | |
136 | ||
137 | db_close($link); | |
138 | ||
139 | while (true) { | |
140 | ||
141 | // Since sleep is interupted by SIGCHLD, we need another way to | |
142 | // respect the SPAWN_INTERVAL | |
143 | $next_spawn = $last_checkpoint + SPAWN_INTERVAL - time(); | |
144 | ||
145 | if ($next_spawn % 10 == 0) { | |
146 | $running_jobs = count($children); | |
147 | _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec."); | |
148 | } | |
149 | ||
150 | if ($last_checkpoint + SPAWN_INTERVAL < time()) { | |
151 | ||
152 | check_ctimes(); | |
153 | reap_children(); | |
154 | ||
155 | for ($j = count($children); $j < MAX_JOBS; $j++) { | |
156 | $pid = pcntl_fork(); | |
157 | if ($pid == -1) { | |
158 | die("fork failed!\n"); | |
159 | } else if ($pid) { | |
160 | _debug("[MASTER] spawned client $j [PID:$pid]..."); | |
161 | array_push($children, $pid); | |
162 | $ctimes[$pid] = time(); | |
163 | } else { | |
164 | pcntl_signal(SIGCHLD, SIG_IGN); | |
165 | pcntl_signal(SIGINT, 'task_sigint_handler'); | |
166 | ||
167 | register_shutdown_function('task_shutdown'); | |
168 | ||
169 | $my_pid = posix_getpid(); | |
170 | $lock_filename = "update_daemon-$my_pid.lock"; | |
171 | ||
172 | $lock_handle = make_lockfile($lock_filename); | |
173 | ||
174 | if (!$lock_handle) { | |
175 | die("error: Can't create lockfile ($lock_filename). ". | |
176 | "Maybe another daemon is already running.\n"); | |
177 | } | |
178 | ||
179 | // ****** Updating RSS code ******* | |
180 | // Only run in fork process. | |
181 | ||
182 | $start_timestamp = time(); | |
183 | ||
184 | $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); | |
185 | ||
186 | if (!init_connection($link)) return; | |
187 | ||
188 | // We disable stamp file, since it is of no use in a multiprocess update. | |
189 | // not really, tho for the time being -fox | |
190 | if (!make_stampfile('update_daemon.stamp')) { | |
191 | print "warning: unable to create stampfile"; | |
192 | } | |
193 | ||
194 | // Call to the feed batch update function | |
195 | // or regenerate feedbrowser cache | |
196 | ||
197 | if (rand(0,100) > 30) { | |
198 | update_daemon_common($link); | |
199 | } else { | |
200 | $count = update_feedbrowser_cache($link); | |
201 | _debug("Feedbrowser updated, $count feeds processed."); | |
202 | ||
203 | purge_orphans($link, true); | |
204 | ||
205 | $rc = cleanup_tags($link, 14, 50000); | |
206 | ||
207 | _debug("Cleaned $rc cached tags."); | |
208 | ||
209 | global $pluginhost; | |
210 | $pluginhost->run_hooks($pluginhost::HOOK_UPDATE_TASK, "hook_update_task", $op); | |
211 | } | |
212 | ||
213 | _debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)"); | |
214 | ||
215 | db_close($link); | |
216 | ||
217 | // We are in a fork. | |
218 | // We wait a little before exiting to avoid to be faster than our parent process. | |
219 | sleep(1); | |
220 | ||
221 | unlink(LOCK_DIRECTORY . "/$lock_filename"); | |
222 | ||
223 | // We exit in order to avoid fork bombing. | |
224 | exit(0); | |
225 | } | |
226 | ||
227 | // We wait a little time before the next fork, in order to let the first fork | |
228 | // mark the feeds it update : | |
229 | sleep(1); | |
230 | } | |
231 | $last_checkpoint = time(); | |
232 | } | |
233 | sleep(1); | |
234 | } | |
235 | ||
236 | ?> |