56 lines
1.3 KiB
PHP
56 lines
1.3 KiB
PHP
#!/usr/bin/php
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<?php
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// This is an experimental multiprocess update daemon
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// It consists of the master server (this file) and
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// client batch script (update_daemon2_client.php) which
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// should only be run by the server process
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declare(ticks = 1);
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require "config.php";
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define('MAX_JOBS', 2);
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define('CLIENT_PROCESS', './update_daemon2_client.php SRV_RUN_OK');
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define('SPAWN_INTERVAL', DAEMON_SLEEP_INTERVAL);
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$running_jobs = 0;
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$last_checkpoint = -1;
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function sigchld_handler($signal) {
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global $running_jobs;
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if ($running_jobs > 0) $running_jobs--;
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print posix_getpid() . ": SIGCHLD received, jobs left: $running_jobs\n";
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pcntl_waitpid(-1, $status, WNOHANG);
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}
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pcntl_signal(SIGCHLD, 'sigchld_handler');
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while (true) {
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$next_spawn = $last_checkpoint + SPAWN_INTERVAL - time();
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print "[MASTER] active jobs: $running_jobs, next spawn at $next_spawn sec\n";
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if ($last_checkpoint + SPAWN_INTERVAL < time()) {
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for ($j = $running_jobs; $j < MAX_JOBS; $j++) {
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print "[MASTER] spawning client $j...";
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$pid = pcntl_fork();
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if ($pid == -1) {
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die("fork failed!\n");
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} else if ($pid) {
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$running_jobs++;
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print "OK [$running_jobs]\n";
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} else {
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pcntl_signal(SIGCHLD, SIG_IGN);
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passthru(CLIENT_PROCESS);
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exit(0);
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}
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}
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$last_checkpoint = time();
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}
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sleep(1);
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}
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?>
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