update semaphore ID

crawler.php

@@ -1,8 +1,12 @@
 <?php
 
-$semaphore = sem_get(1);
+$semaphore = sem_get(crc32('kvazar-network.crawler_full_node'), 1);
 
-if (false !== sem_acquire($semaphore, 1)) {
+if (false === sem_acquire($semaphore, true)) {
+
+  echo "database locked by the another process...\n";
+  exit;
+}
 
 require_once(__DIR__ . '/config.php');
 require_once(__DIR__ . '/library/sqlite.php');
@@ -181,9 +185,3 @@ if (false !== sem_acquire($semaphore, 1)) {
   echo "scanning completed.\n";
   # print_r($response);
 }
-
-  sem_release($semaphore);
-
-} else {
-  echo "database locked by the another process...\n";
-}