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Commit | Line | Data |
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02008cb1 AD |
1 | #!/usr/bin/php |
2 | <?php | |
ffa7cbae AD |
3 | // This is an experimental multiprocess update daemon. |
4 | // Some configurable variable may be found below. | |
5 | ||
02008cb1 AD |
6 | declare(ticks = 1); |
7 | ||
ffa7cbae | 8 | define('DISABLE_SESSIONS', true); |
02008cb1 | 9 | |
ffa7cbae AD |
10 | require_once "version.php"; |
11 | ||
010c16f1 | 12 | if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) { |
ffa7cbae AD |
13 | define('DAEMON_EXTENDED_DEBUG', true); |
14 | } | |
15 | ||
16 | define('PURGE_INTERVAL', 3600); // seconds | |
c90a028c | 17 | define('MAX_CHILD_RUNTIME', 600); // seconds |
ffa7cbae AD |
18 | |
19 | require_once "sanity_check.php"; | |
20 | require_once "config.php"; | |
21 | ||
98f70418 | 22 | define('MAX_JOBS', 2); |
02008cb1 | 23 | define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL); |
ffa7cbae | 24 | |
16956646 AD |
25 | if (!function_exists('pcntl_fork')) { |
26 | die("error: This script requires PHP compiled with PCNTL module.\n"); | |
27 | } | |
28 | ||
ffa7cbae AD |
29 | require_once "db.php"; |
30 | require_once "db-prefs.php"; | |
31 | require_once "functions.php"; | |
816cdfb7 | 32 | require_once "lib/magpierss/rss_fetch.inc"; |
ffa7cbae | 33 | |
e9338405 | 34 | $children = array(); |
c90a028c | 35 | $ctimes = array(); |
e9338405 | 36 | |
02008cb1 AD |
37 | $last_checkpoint = -1; |
38 | ||
5a613536 | 39 | function reap_children() { |
e9338405 | 40 | global $children; |
51ddf0f8 | 41 | global $ctimes; |
e9338405 AD |
42 | |
43 | $tmp = array(); | |
44 | ||
45 | foreach ($children as $pid) { | |
46 | if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) { | |
7aabaa09 AD |
47 | |
48 | if (file_is_locked("update_daemon-$pid.lock")) { | |
8ccaff02 AD |
49 | array_push($tmp, $pid); |
50 | } else { | |
51 | _debug("[reap_children] child $pid seems active but lockfile is unlocked."); | |
52 | } | |
e9338405 | 53 | } else { |
8ccaff02 | 54 | _debug("[reap_children] child $pid reaped."); |
c90a028c | 55 | unset($ctimes[$pid]); |
e9338405 AD |
56 | } |
57 | } | |
58 | ||
59 | $children = $tmp; | |
60 | ||
5a613536 AD |
61 | return count($tmp); |
62 | } | |
63 | ||
c90a028c AD |
64 | function check_ctimes() { |
65 | global $ctimes; | |
dbaa4e4a | 66 | |
c90a028c AD |
67 | foreach (array_keys($ctimes) as $pid) { |
68 | $started = $ctimes[$pid]; | |
69 | ||
70 | if (time() - $started > MAX_CHILD_RUNTIME) { | |
71 | _debug("[MASTER] child process $pid seems to be stuck, aborting..."); | |
0618b81c | 72 | posix_kill($pid, SIGKILL); |
c90a028c AD |
73 | } |
74 | } | |
5a613536 AD |
75 | } |
76 | ||
77 | function sigchld_handler($signal) { | |
78 | $running_jobs = reap_children(); | |
e9338405 AD |
79 | |
80 | _debug("[SIGCHLD] jobs left: $running_jobs"); | |
5a613536 | 81 | |
02008cb1 AD |
82 | pcntl_waitpid(-1, $status, WNOHANG); |
83 | } | |
84 | ||
8ccaff02 AD |
85 | function shutdown() { |
86 | if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) | |
87 | unlink(LOCK_DIRECTORY . "/update_daemon.lock"); | |
88 | } | |
89 | ||
90 | function task_shutdown() { | |
91 | $pid = posix_getpid(); | |
92 | ||
93 | if (file_exists(LOCK_DIRECTORY . "/update_daemon-$pid.lock")) | |
94 | unlink(LOCK_DIRECTORY . "/update_daemon-$pid.lock"); | |
95 | } | |
96 | ||
6a69e61f | 97 | function sigint_handler() { |
8ccaff02 | 98 | shutdown(); |
a65a05a7 | 99 | die("[SIGINT] removing lockfile and exiting.\n"); |
dbaa4e4a | 100 | } |
8ccaff02 AD |
101 | |
102 | function task_sigint_handler() { | |
103 | task_shutdown(); | |
104 | die("[SIGINT] removing lockfile and exiting.\n"); | |
dbaa4e4a | 105 | } |
6a69e61f | 106 | |
02008cb1 | 107 | pcntl_signal(SIGCHLD, 'sigchld_handler'); |
6a69e61f | 108 | |
884c0a36 AD |
109 | if (file_is_locked("update_daemon.lock")) { |
110 | die("error: Can't create lockfile. ". | |
6a69e61f AD |
111 | "Maybe another daemon is already running.\n"); |
112 | } | |
02008cb1 | 113 | |
884c0a36 | 114 | if (!pcntl_fork()) { |
0d6a7147 | 115 | pcntl_signal(SIGINT, 'sigint_handler'); |
8ccaff02 | 116 | register_shutdown_function('shutdown'); |
0d6a7147 | 117 | |
45004d43 | 118 | // Try to lock a file in order to avoid concurrent update. |
884c0a36 AD |
119 | $lock_handle = make_lockfile("update_daemon.lock"); |
120 | ||
121 | if (!$lock_handle) { | |
122 | die("error: Can't create lockfile. ". | |
123 | "Maybe another daemon is already running.\n"); | |
124 | } | |
125 | ||
126 | while (true) { sleep(100); } | |
127 | } | |
128 | ||
ffa7cbae AD |
129 | // Testing database connection. |
130 | // It is unnecessary to start the fork loop if database is not ok. | |
dbaa4e4a | 131 | $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); |
ffa7cbae AD |
132 | |
133 | if (!$link) { | |
134 | if (DB_TYPE == "mysql") { | |
135 | print mysql_error(); | |
136 | } | |
dbaa4e4a | 137 | // PG seems to display its own errors just fine by default. |
ffa7cbae AD |
138 | return; |
139 | } | |
140 | ||
141 | db_close($link); | |
142 | ||
02008cb1 AD |
143 | while (true) { |
144 | ||
45004d43 AD |
145 | // Since sleep is interupted by SIGCHLD, we need another way to |
146 | // respect the SPAWN_INTERVAL | |
02008cb1 AD |
147 | $next_spawn = $last_checkpoint + SPAWN_INTERVAL - time(); |
148 | ||
ce1aa9b7 | 149 | if ($next_spawn % 10 == 0) { |
e9338405 AD |
150 | $running_jobs = count($children); |
151 | _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec."); | |
ce1aa9b7 | 152 | } |
02008cb1 AD |
153 | |
154 | if ($last_checkpoint + SPAWN_INTERVAL < time()) { | |
155 | ||
c90a028c | 156 | check_ctimes(); |
5a613536 AD |
157 | reap_children(); |
158 | ||
e9338405 | 159 | for ($j = count($children); $j < MAX_JOBS; $j++) { |
02008cb1 AD |
160 | $pid = pcntl_fork(); |
161 | if ($pid == -1) { | |
162 | die("fork failed!\n"); | |
163 | } else if ($pid) { | |
e9338405 AD |
164 | _debug("[MASTER] spawned client $j [PID:$pid]..."); |
165 | array_push($children, $pid); | |
c90a028c | 166 | $ctimes[$pid] = time(); |
02008cb1 AD |
167 | } else { |
168 | pcntl_signal(SIGCHLD, SIG_IGN); | |
8ccaff02 AD |
169 | pcntl_signal(SIGINT, 'task_sigint_handler'); |
170 | ||
171 | register_shutdown_function('task_shutdown'); | |
172 | ||
173 | $my_pid = posix_getpid(); | |
174 | $lock_filename = "update_daemon-$my_pid.lock"; | |
175 | ||
176 | $lock_handle = make_lockfile($lock_filename); | |
177 | ||
178 | if (!$lock_handle) { | |
179 | die("error: Can't create lockfile ($lock_filename). ". | |
180 | "Maybe another daemon is already running.\n"); | |
181 | } | |
ffa7cbae AD |
182 | |
183 | // ****** Updating RSS code ******* | |
184 | // Only run in fork process. | |
185 | ||
186 | $start_timestamp = time(); | |
187 | ||
dbaa4e4a | 188 | $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); |
ffa7cbae AD |
189 | |
190 | if (!$link) { | |
191 | if (DB_TYPE == "mysql") { | |
192 | print mysql_error(); | |
193 | } | |
dbaa4e4a | 194 | // PG seems to display its own errors just fine by default. |
ffa7cbae AD |
195 | return; |
196 | } | |
197 | ||
f29ba148 | 198 | init_connection($link); |
ffa7cbae AD |
199 | |
200 | // We disable stamp file, since it is of no use in a multiprocess update. | |
201 | // not really, tho for the time being -fox | |
202 | if (!make_stampfile('update_daemon.stamp')) { | |
203 | print "warning: unable to create stampfile"; | |
dbaa4e4a | 204 | } |
ffa7cbae | 205 | |
dbaa4e4a | 206 | // Call to the feed batch update function |
e3b54693 AD |
207 | // or regenerate feedbrowser cache |
208 | ||
8ccaff02 | 209 | if (rand(0,100) > 30) { |
e3b54693 AD |
210 | update_daemon_common($link); |
211 | } else { | |
212 | $count = update_feedbrowser_cache($link); | |
e3b42c5a AD |
213 | _debug("Feedbrowser updated, $count feeds processed."); |
214 | ||
215 | purge_orphans($link, true); | |
216 | ||
217 | $rc = cleanup_tags($link, 14, 50000); | |
218 | ||
219 | _debug("Cleaned $rc cached tags."); | |
220 | ||
e3b54693 | 221 | } |
ffa7cbae | 222 | |
0d6a7147 | 223 | _debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)"); |
dbaa4e4a | 224 | |
ffa7cbae AD |
225 | db_close($link); |
226 | ||
227 | // We are in a fork. | |
228 | // We wait a little before exiting to avoid to be faster than our parent process. | |
229 | sleep(1); | |
8ccaff02 AD |
230 | |
231 | unlink(LOCK_DIRECTORY . "/$lock_filename"); | |
232 | ||
ffa7cbae | 233 | // We exit in order to avoid fork bombing. |
02008cb1 AD |
234 | exit(0); |
235 | } | |
0d6a7147 AD |
236 | |
237 | // We wait a little time before the next fork, in order to let the first fork | |
238 | // mark the feeds it update : | |
239 | sleep(1); | |
02008cb1 AD |
240 | } |
241 | $last_checkpoint = time(); | |
242 | } | |
243 | sleep(1); | |
244 | } | |
245 | ||
246 | ?> |