ozone: evdev: Filter devices by path

ui/events/ozone/evdev/device_manager_udev.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/ozone/evdev/device_manager_udev.h"
 
 #include <libudev.h>
 
 #include "base/debug/trace_event.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_pump_ozone.h"
+#include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "ui/events/ozone/evdev/device_manager_evdev.h"
 #include "ui/events/ozone/evdev/event_factory_evdev.h"
 #include "ui/events/ozone/evdev/scoped_udev.h"
 
 namespace ui {
 
 namespace {
 
 const char kSubsystemInput[] = "input";
@@ skipping 71 matching lines @@
     const char* name = udev_list_entry_get_name(entry);
 
     scoped_udev_device device(udev_device_new_from_syspath(udev, name));
     if (!device)
       continue;
 
     const char* path = udev_device_get_devnode(device.get());
     if (!path)
       continue;
 
+    // Filter non-evdev device notes.
+    if (!StartsWithASCII(path, "/dev/input/event", true))
+      continue;
+
     // Found input device node; attach.
     device_callback.Run(base::FilePath(path));
   }
 
   return true;
 }
 
 // Device enumerator & monitor using udev.
 //
 // This class enumerates input devices attached to the system using udev.
@@ skipping 90 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(DeviceManagerUdev);
 };
 
 }  // namespace
 
 scoped_ptr<DeviceManagerEvdev> CreateDeviceManagerUdev() {
   return make_scoped_ptr<DeviceManagerEvdev>(new DeviceManagerUdev());
 }
 
 }  // namespace ui