Update README and document mark flag bugs

Author: opcoder0

README.md

@@ -34,6 +34,27 @@ func main() {
                 os.Exit(1)
         }
         fmt.Println("Listening to events for:", listenPath)
+	var actions Action
+	actions =
+		fanotify.FileAccessed |
+			fanotify.FileOrDirectoryAccessed |
+			fanotify.FileModified |
+			fanotify.FileOpenedForExec |
+			fanotify.FileAttribChanged |
+			fanotify.FileOrDirAttribChanged |
+			fanotify.FileCreated |
+			fanotify.FileOrDirCreated |
+			fanotify.FileDeleted |
+			fanotify.FileOrDirDeleted |
+			fanotify.WatchedFileDeleted |
+			fanotify.WatchedFileOrDirDeleted |
+			fanotify.FileMovedFrom |
+			fanotify.FileOrDirMovedFrom |
+			fanotify.FileMovedTo |
+			fanotify.FileOrDirMovedTo |
+			fanotify.WatchedFileMoved |
+			fanotify.WatchedFileOrDirMoved
+
         listener.AddWatch(listenPath, fanotify.FileOrDirectoryAccessed)
         go listener.Start()
         i := 1

fanotify_event.go

@@ -103,10 +103,6 @@ func fanotifyMarkMaskValid(mask uint64) error {
 	return nil
 }
 
-func markFlagsValid(flags uint64) bool {
-	return false
-}
-
 // Check if specified fanotify_init flags are supported for the given
 // kernel version. If none of the defined flags are specified
 // then the basic option works on any kernel version.

fanotify_event_types.go

@@ -22,9 +22,15 @@ const (
 	FileClosed Action = unix.FAN_CLOSE_WRITE | unix.FAN_CLOSE_NOWRITE
 
 	// FileOpened event when a file is opened
+	// BUG Using FileOpened flag with any OnDir or OnDirectory actions
+	// causes an event flood and complete stoppage of events. The flag
+	// can be used with other file only flags or by itself
+	// without any errors/issues.
 	FileOpened Action = unix.FAN_OPEN
 
 	// FileOrDirectoryOpened event when a file or directory is opened
+	// BUG Using FileOrDirectoryOpened causes an event flood and complete
+	// stoppage of events. The flag by itself without any errors/issues.
 	FileOrDirectoryOpened Action = unix.FAN_OPEN | unix.FAN_ONDIR
 
 	// FileOpenedForExec event when a file is opened with the intent to be executed.
@@ -41,6 +47,7 @@ const (
 
 	// FileCreated event when file a has been created
 	// Requires Linux kernel 5.1 or later (requires FID)
+	// BUG FileCreated does not work with FileClosed, FileClosedAfterWrite or FileClosedWithNoWrite
 	FileCreated Action = unix.FAN_CREATE
 
 	// FileOrDirCreated event when a file or directory has been created