friendica_2020-09-1_sharedHosting/bin/wait-for-connection

#!/usr/bin/php
<?php
/**
 * @copyright Copyright (C) 2020, Friendica
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 * This script tries to connect to a database for a given interval
 * Useful in case of installation e.g. to wait for the database to not generate unnecessary errors
 *
 * Usage: php bin/wait-for-connection {HOST} {PORT} [{TIMEOUT}]
 */

if (php_sapi_name() !== 'cli') {
	header($_SERVER["SERVER_PROTOCOL"] . ' 403 Forbidden');
	exit();
}

$timeout = 60;
switch ($argc) {
	case 4:
		$timeout = (float)$argv[3];
	case 3:
		$host = $argv[1];
		$port = (int)$argv[2];
		break;
	default:
		fwrite(STDERR, 'Usage: '.$argv[0].' host port [timeout]'."\n");
		exit(2);
}
if ($timeout < 0) {
	fwrite(STDERR, 'Timeout must be greater than zero'."\n");
	exit(2);
}
if ($port < 1) {
	fwrite(STDERR, 'Port must be an integer greater than zero'."\n");
	exit(2);
}
$socketTimeout = (float)ini_get('default_socket_timeout');
if ($socketTimeout > $timeout) {
	$socketTimeout = $timeout;
}
$stopTime = time() + $timeout;
do {
	$sock = @fsockopen($host, $port, $errno, $errstr, $socketTimeout);
	if ($sock !== false) {
		fclose($sock);
		fwrite(STDOUT, "\n");
		exit(0);
	}
	sleep(1);
	fwrite(STDOUT, '.');
} while (time() < $stopTime);
fwrite(STDOUT, "\n");
exit(1);