Skip the folder in recursive mode if the user doesn't have permissions

Author: jakubno

backend_inotify.go

@@ -248,6 +248,17 @@ func (w *inotify) AddWith(path string, opts ...addOpt) error {
 				w.sendEvent(Event{Name: root, Op: Create})
 			}
 
+			// If there's a dir for which we don't have read permissions,
+			// skip it silently. If it's the root directory itself, return an error.
+			_, infoErr := d.Info()
+			if infoErr != nil && errors.Is(infoErr, os.ErrPermission) {
+				if root == path {
+					return fmt.Errorf("fsnotify: not a readable directory: %q", path)
+				}
+
+				return filepath.SkipDir // Skip this directory silently.
+			}
+
 			wf := flagRecurse
 			if root == path {
 				wf |= flagByUser
@@ -562,6 +573,13 @@ func (w *inotify) handleEvent(inEvent *unix.InotifyEvent, buf *[65536]byte, offs
 					ev = w.newEvent(curDir, unix.IN_CREATE, 0)
 				}
 
+				// If there's a dir for which we don't have read permissions,
+				// skip it silently. If it's the root directory itself, return an error.
+				_, infoErr := d.Info()
+				if infoErr != nil && errors.Is(infoErr, os.ErrPermission) {
+					return filepath.SkipDir // Skip this directory silently.
+				}
+
 				if d.IsDir() {
 					return w.register(curDir, watch.flags, flagRecurse)
 				}