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Use "pcntl_fork" to fork processes

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This commit is contained in:
Michael 2021-01-01 19:35:29 +00:00
parent b10cd8772c
commit 9a6141dcbe
5 changed files with 112 additions and 27 deletions
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42
bin/daemon.php
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@ -29,6 +29,7 @@ if (php_sapi_name() !== 'cli') {
}
use Dice\Dice;
use Friendica\App\Mode;
use Friendica\Core\Logger;
use Friendica\Core\Worker;
use Friendica\Database\DBA;
@ -65,6 +66,8 @@ if (DI::mode()->isInstall()) {
die("Friendica isn't properly installed yet.\n");
}
DI::mode()->setExecutor(Mode::DAEMON);
DI::config()->load();
if (empty(DI::config()->get('system', 'pidfile'))) {
@ -144,34 +147,35 @@ Logger::notice('Starting worker daemon.', ["pid" => $pid]);
if (!$foreground) {
echo "Starting worker daemon.\n";
// Switch over to daemon mode.
if ($pid = pcntl_fork()) {
return; // Parent
}
fclose(STDIN); // Close all of the standard
// Enabling this seem to block a running php process with 100% CPU usage when there is an outpout
// fclose(STDOUT); // file descriptors as we
// fclose(STDERR); // are running as a daemon.
DBA::disconnect();
// Fork a daemon process
$pid = pcntl_fork();
if ($pid == -1) {
echo "Daemon couldn't be forked.\n";
Logger::warning('Could not fork daemon');
exit(1);
} elseif ($pid) {
// The parent process continues here
echo 'Child process started with pid ' . $pid . ".\n";
Logger::notice('Child process started', ['pid' => $pid]);
file_put_contents($pidfile, $pid);
exit(0);
}
// We now are in the child process
register_shutdown_function('shutdown');
// Make the child the main process, detach it from the terminal
if (posix_setsid() < 0) {
return;
}
if ($pid = pcntl_fork()) {
return; // Parent
}
// Closing all existing connections with the outside
fclose(STDIN);
$pid = getmypid();
file_put_contents($pidfile, $pid);
// We lose the database connection upon forking
DBA::reconnect();
// And now connect the database again
DBA::connect();
}
DI::config()->set('system', 'worker_daemon_mode', true);