Updated Readme and FileLocker.

Author: alexmerlin

README.md

@@ -56,5 +56,17 @@ Available commands:
 As shown in `config/autoload/cli.global.php`, dot-cli includes a demo command `demo-command` that will help you understand the basics of creating a new command.
 For more information, see [laminas-cli documentation](https://docs.laminas.dev/laminas-cli/).
 
+### Setting up as cronjob
+```text
+*   *   *   *   *   /opt/plesk/php/7.4/bin/php /var/www/vhosts/example.com/httpdocs/bin/cli.php demo-command -q
+```
+or
+```text
+*   *   *   *   *   cd /var/www/vhosts/example.com/httpdocs/bin && /opt/plesk/php/7.4/bin/php ./cli.php demo-command -q
+```
+Adapt the command to your secifications by replacing _7.4_ with your PHP version and _example.com_ with your domain name.
+
+Note the **-q** (or **--quiet**) option at the end of the command - it serves as a flag to inform the Application that no output should be returned (unless it's an error).
+
 ## License
 MIT

src/FileLocker.php

@@ -109,8 +109,10 @@ public function lock(): void
 
         $lockFile = $this->getLockFilePath();
         $fp = fopen($lockFile, 'w+');
-        if (!flock($fp, LOCK_EX)) {
-            throw new Exception('Another process holds the lock!');
+        if (!flock($fp, LOCK_EX|LOCK_NB, $wouldBlock)) {
+            if ($wouldBlock) {
+                throw new Exception('Another process holds the lock!');
+            }
         }
         fclose($fp);
     }