add lockfile for checker

.gitignore

@@ -2,5 +2,6 @@
 /logs/*
 /public/export/*
 /tmp/*
+/checker.lock
 /config.php
 /hosts.txt

checker.php

@@ -6,16 +6,32 @@ use App\BOB;
 use App\DB;
 use Amp\Loop;
 use Amp\Parallel\Worker\DefaultPool;
+use Amp\TimeoutException;
 
 /* Disable execution limit */
 set_time_limit(0);
 
 $pdo = (new DB($options))->pdo;
 
+$lockfile = __DIR__ . '/checker.lock';
+$full = false;
 $results = [];
 
+if($argc == 2 && $argv[1] == "full") {
+    $full = true;
+}
+
+echo "[CHECKER] Checking lockfile" . PHP_EOL;
+$fp = fopen($lockfile, 'c');
+
+if(!flock($fp, LOCK_EX | LOCK_NB)) {
+    echo "[CHECKER] Looks like another checker is running, exiting..." . PHP_EOL;
+    exit(-1);
+}
+
 echo "[DB] Fetching hosts to check from database" . PHP_EOL;
-if ((($options['fullhour'] >= 0) && ($options['fullhour'] <= 23)) && date('H') == $options['fullhour']) { // check all hosts at full check hour
+if ((($options['fullhour'] >= 0) && ($options['fullhour'] <= 23)) && date('H') == $options['fullhour'] || $full) { // check all hosts at full check hour or when argument 'full' passed
+    echo "[CHECKER] Starting FULL check" . PHP_EOL;
     $STH = $pdo->query("SELECT `host`, `base32` FROM `hosts`");
 
 } else {
@@ -41,6 +57,7 @@ if ($bob->setnick()) {
 }
 
 /* Start async checker tasks */
+try {
     Loop::run(function () use (&$results, $hosts, $options) {
         $pool = new DefaultPool($options['checkthreads']);
 
@@ -56,6 +73,11 @@ Loop::run(function () use (&$results, $hosts, $options) {
 
         return yield $pool->shutdown();
     });
+//} catch (Amp\TimeoutException $ex) {
+} catch (\Throwable $ex) {
+    echo "[Checker] Exception: " . $ex . PHP_EOL;
+}
+
 
 echo "[BOB] Stopping session" . PHP_EOL;
 $bob->stop();
@@ -76,4 +98,7 @@ foreach ($results as $host => $ts) {
 
 $pdo->commit();
 
-echo "Result: Total hosts: " . count($results) . ", Alive: " . $i . PHP_EOL;
+echo "[CHECKER] Unlocking and closing lockfile" . PHP_EOL;
+fclose($fp);
+
+echo "[CHECKER] Result: Total hosts: " . count($results) . ", Alive: " . $i . PHP_EOL;