<br />
<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_pmfhujpob0puua9vtltfodorcp, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
<br />
<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
!7

import java.nio.channels.*;
import java.nio.file.*;

p {
  File path = programFile("lockfile");
  FileChannel channel = FileChannel.open(toPath(path), StandardOpenOption.CREATE, StandardOpenOption.WRITE);
  repeat with sleep 1 {
    {
      temp FileLock lock = channel.tryLock();
      if (lock == null) print("Couldn't lock.");
      else { print("Locked!"); sleepSeconds(1); }
    }
  }
}