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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 | ||
6 | // define('DEFAULT_ERROR_LEVEL', E_ALL); | |
7 | define('DEFAULT_ERROR_LEVEL', E_ERROR | E_WARNING | E_PARSE); | |
02008cb1 AD |
8 | |
9 | declare(ticks = 1); | |
10 | ||
ffa7cbae | 11 | define('DISABLE_SESSIONS', true); |
02008cb1 | 12 | |
ffa7cbae AD |
13 | require_once "version.php"; |
14 | ||
010c16f1 | 15 | if (strpos(VERSION, ".99") !== false || getenv('DAEMON_XDEBUG')) { |
ffa7cbae AD |
16 | define('DAEMON_EXTENDED_DEBUG', true); |
17 | } | |
18 | ||
19 | define('PURGE_INTERVAL', 3600); // seconds | |
20 | ||
21 | require_once "sanity_check.php"; | |
22 | require_once "config.php"; | |
23 | ||
98f70418 AD |
24 | define('MAX_JOBS', 2); |
25 | ||
02008cb1 | 26 | define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL); |
ffa7cbae | 27 | |
16956646 AD |
28 | if (!function_exists('pcntl_fork')) { |
29 | die("error: This script requires PHP compiled with PCNTL module.\n"); | |
30 | } | |
31 | ||
ffa7cbae | 32 | if (!ENABLE_UPDATE_DAEMON) { |
16956646 | 33 | die("error: Please enable option ENABLE_UPDATE_DAEMON in config.php\n"); |
ffa7cbae AD |
34 | } |
35 | ||
36 | require_once "db.php"; | |
37 | require_once "db-prefs.php"; | |
38 | require_once "functions.php"; | |
816cdfb7 | 39 | require_once "lib/magpierss/rss_fetch.inc"; |
ffa7cbae AD |
40 | |
41 | error_reporting(DEFAULT_ERROR_LEVEL); | |
02008cb1 | 42 | |
e9338405 AD |
43 | $children = array(); |
44 | ||
02008cb1 AD |
45 | $last_checkpoint = -1; |
46 | ||
5a613536 | 47 | function reap_children() { |
e9338405 AD |
48 | global $children; |
49 | ||
50 | $tmp = array(); | |
51 | ||
52 | foreach ($children as $pid) { | |
53 | if (pcntl_waitpid($pid, $status, WNOHANG) != $pid) { | |
54 | array_push($tmp, $pid); | |
55 | } else { | |
56 | _debug("[SIGCHLD] child $pid reaped."); | |
57 | } | |
58 | } | |
59 | ||
60 | $children = $tmp; | |
61 | ||
5a613536 AD |
62 | return count($tmp); |
63 | } | |
64 | ||
65 | function sigalrm_handler() { | |
a65a05a7 | 66 | die("[SIGALRM] hang in feed update?\n"); |
5a613536 AD |
67 | } |
68 | ||
69 | function sigchld_handler($signal) { | |
70 | $running_jobs = reap_children(); | |
e9338405 AD |
71 | |
72 | _debug("[SIGCHLD] jobs left: $running_jobs"); | |
5a613536 | 73 | |
02008cb1 AD |
74 | pcntl_waitpid(-1, $status, WNOHANG); |
75 | } | |
76 | ||
6a69e61f AD |
77 | function sigint_handler() { |
78 | unlink(LOCK_DIRECTORY . "/update_daemon.lock"); | |
a65a05a7 | 79 | die("[SIGINT] removing lockfile and exiting.\n"); |
6a69e61f AD |
80 | } |
81 | ||
ffa7cbae | 82 | pcntl_signal(SIGALRM, 'sigalrm_handler'); |
02008cb1 | 83 | pcntl_signal(SIGCHLD, 'sigchld_handler'); |
6a69e61f | 84 | |
884c0a36 AD |
85 | if (file_is_locked("update_daemon.lock")) { |
86 | die("error: Can't create lockfile. ". | |
6a69e61f AD |
87 | "Maybe another daemon is already running.\n"); |
88 | } | |
02008cb1 | 89 | |
884c0a36 | 90 | if (!pcntl_fork()) { |
0d6a7147 AD |
91 | pcntl_signal(SIGINT, 'sigint_handler'); |
92 | ||
45004d43 | 93 | // Try to lock a file in order to avoid concurrent update. |
884c0a36 AD |
94 | $lock_handle = make_lockfile("update_daemon.lock"); |
95 | ||
96 | if (!$lock_handle) { | |
97 | die("error: Can't create lockfile. ". | |
98 | "Maybe another daemon is already running.\n"); | |
99 | } | |
100 | ||
101 | while (true) { sleep(100); } | |
102 | } | |
103 | ||
ffa7cbae AD |
104 | // Testing database connection. |
105 | // It is unnecessary to start the fork loop if database is not ok. | |
106 | $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); | |
107 | ||
108 | if (!$link) { | |
109 | if (DB_TYPE == "mysql") { | |
110 | print mysql_error(); | |
111 | } | |
112 | // PG seems to display its own errors just fine by default. | |
113 | return; | |
114 | } | |
115 | ||
116 | db_close($link); | |
117 | ||
02008cb1 AD |
118 | while (true) { |
119 | ||
45004d43 AD |
120 | // Since sleep is interupted by SIGCHLD, we need another way to |
121 | // respect the SPAWN_INTERVAL | |
02008cb1 AD |
122 | $next_spawn = $last_checkpoint + SPAWN_INTERVAL - time(); |
123 | ||
ce1aa9b7 | 124 | if ($next_spawn % 10 == 0) { |
e9338405 AD |
125 | $running_jobs = count($children); |
126 | _debug("[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec."); | |
ce1aa9b7 | 127 | } |
02008cb1 AD |
128 | |
129 | if ($last_checkpoint + SPAWN_INTERVAL < time()) { | |
130 | ||
5a613536 AD |
131 | reap_children(); |
132 | ||
e9338405 | 133 | for ($j = count($children); $j < MAX_JOBS; $j++) { |
02008cb1 AD |
134 | $pid = pcntl_fork(); |
135 | if ($pid == -1) { | |
136 | die("fork failed!\n"); | |
137 | } else if ($pid) { | |
e9338405 AD |
138 | _debug("[MASTER] spawned client $j [PID:$pid]..."); |
139 | array_push($children, $pid); | |
02008cb1 AD |
140 | } else { |
141 | pcntl_signal(SIGCHLD, SIG_IGN); | |
6a69e61f | 142 | pcntl_signal(SIGINT, SIG_DFL); |
ffa7cbae AD |
143 | |
144 | // ****** Updating RSS code ******* | |
145 | // Only run in fork process. | |
146 | ||
147 | $start_timestamp = time(); | |
148 | ||
149 | $link = db_connect(DB_HOST, DB_USER, DB_PASS, DB_NAME); | |
150 | ||
151 | if (!$link) { | |
152 | if (DB_TYPE == "mysql") { | |
153 | print mysql_error(); | |
154 | } | |
155 | // PG seems to display its own errors just fine by default. | |
156 | return; | |
157 | } | |
158 | ||
f29ba148 | 159 | init_connection($link); |
ffa7cbae AD |
160 | |
161 | // We disable stamp file, since it is of no use in a multiprocess update. | |
162 | // not really, tho for the time being -fox | |
163 | if (!make_stampfile('update_daemon.stamp')) { | |
164 | print "warning: unable to create stampfile"; | |
165 | } | |
166 | ||
ffa7cbae AD |
167 | // FIXME : $last_purge is of no use in a multiprocess update. |
168 | // FIXME : We ALWAYS purge old posts. | |
3907ef71 AD |
169 | //_debug("Purging old posts (random 30 feeds)..."); |
170 | //global_purge_old_posts($link, true, 30); | |
ffa7cbae | 171 | |
e3b54693 AD |
172 | // Call to the feed batch update function |
173 | // or regenerate feedbrowser cache | |
174 | ||
175 | if (rand(0,100) > 50) { | |
176 | update_daemon_common($link); | |
177 | } else { | |
178 | $count = update_feedbrowser_cache($link); | |
179 | _debug("Finished, $count feeds processed."); | |
180 | } | |
ffa7cbae | 181 | |
0d6a7147 | 182 | _debug("Elapsed time: " . (time() - $start_timestamp) . " second(s)"); |
abfa57fd | 183 | |
ffa7cbae AD |
184 | db_close($link); |
185 | ||
186 | // We are in a fork. | |
187 | // We wait a little before exiting to avoid to be faster than our parent process. | |
188 | sleep(1); | |
189 | // We exit in order to avoid fork bombing. | |
02008cb1 AD |
190 | exit(0); |
191 | } | |
0d6a7147 AD |
192 | |
193 | // We wait a little time before the next fork, in order to let the first fork | |
194 | // mark the feeds it update : | |
195 | sleep(1); | |
02008cb1 AD |
196 | } |
197 | $last_checkpoint = time(); | |
198 | } | |
199 | sleep(1); | |
200 | } | |
201 | ||
202 | ?> |