components/storage_monitor/udev_util_linux.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_STORAGE_MONITOR_UDEV_UTIL_LINUX_H_
   6 #define COMPONENTS_STORAGE_MONITOR_UDEV_UTIL_LINUX_H_
   7
   8 #include <libudev.h>
   9
  10 #include <string>
  11
  12 #include "base/memory/scoped_ptr.h"
  13
  14 namespace base {
  15 class FilePath;
  16 }
  17
  18 namespace storage_monitor {
  19
  20 // Deleter for ScopedUdevObject.
  21 struct UdevDeleter {
  22   void operator()(struct udev* udev);
  23 };
  24 typedef scoped_ptr<struct udev, UdevDeleter> ScopedUdevObject;
  25
  26 // Deleter for ScopedUdevDeviceObject().
  27 struct UdevDeviceDeleter {
  28   void operator()(struct udev_device* device);
  29 };
  30 typedef scoped_ptr<struct udev_device, UdevDeviceDeleter>
  31     ScopedUdevDeviceObject;
  32
  33 // Wrapper function for udev_device_get_property_value() that also checks for
  34 // valid but empty values.
  35 std::string GetUdevDevicePropertyValue(struct udev_device* udev_device,
  36                                        const char* key);
  37
  38 // Helper for udev_device_new_from_syspath()/udev_device_get_property_value()
  39 // pair. |device_path| is the absolute path to the device, including /sys.
  40 bool GetUdevDevicePropertyValueByPath(const base::FilePath& device_path,
  41                                       const char* key,
  42                                       std::string* result);
  43
  44 }  // namespace storage_monitor
  45
  46 #endif  // COMPONENTS_STORAGE_MONITOR_UDEV_UTIL_LINUX_H_