Why does my fanotify monitor think all events have descriptor -1?

My fanotify monitor think all events have descriptor -1, help please

Understood! Here’s how you can resolve the issue of your fanotify monitor thinking all events have descriptor -1:

Common Causes Incorrect Initialization Flags: Using the wrong flags when initializing fanotify can lead to issues.

Invalid File Descriptor: The fanotify file descriptor might not be valid or properly handled.

Event Handling Issues: Improper handling of fanotify events can result in descriptor -1.

Steps to Diagnose and Fix the Issue Verify Initialization Flags: Ensure the flags used in fanotify_init are correct and compatible. The choice of flags is crucial for the proper functioning of fanotify.

Check the File Descriptor: Ensure that the fanotify file descriptor is valid. Validate that the descriptor returned by fanotify_init is not -1.

Review Event Handling: Make sure that your event handling code correctly processes fanotify events. Ensure that the correct file descriptors are retrieved and processed.

Best Practices Use Consistent Flags: Use consistent and compatible flags when initializing fanotify.

Implement Proper Error Handling: Ensure your code catches and addresses any issues during initialization and event handling.

Regular Testing: Test your fanotify monitor under different scenarios and environments to ensure consistent behavior.

Potential Pitfalls Invalid Initialization: Using incorrect flags can lead to invalid initialization of fanotify.

Improper Descriptor Handling: Ensure that the file descriptors are correctly handled to avoid issues with descriptor -1.

By following these steps, you should be able to diagnose and resolve the issue with your fanotify monitor.