src/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 // Deleter for ScopedUdevObject.
  19 struct UdevDeleter {
  20   void operator()(struct udev* udev);
  21 };
  22 typedef scoped_ptr<struct udev, UdevDeleter> ScopedUdevObject;
  23
  24 // Deleter for ScopedUdevDeviceObject().
  25 struct UdevDeviceDeleter {
  26   void operator()(struct udev_device* device);
  27 };
  28 typedef scoped_ptr<struct udev_device, UdevDeviceDeleter>
  29     ScopedUdevDeviceObject;
  30
  31 // Wrapper function for udev_device_get_property_value() that also checks for
  32 // valid but empty values.
  33 std::string GetUdevDevicePropertyValue(struct udev_device* udev_device,
  34                                        const char* key);
  35
  36 // Helper for udev_device_new_from_syspath()/udev_device_get_property_value()
  37 // pair. |device_path| is the absolute path to the device, including /sys.
  38 bool GetUdevDevicePropertyValueByPath(const base::FilePath& device_path,
  39                                       const char* key,
  40                                       std::string* result);
  41
  42 #endif  // COMPONENTS_STORAGE_MONITOR_UDEV_UTIL_LINUX_H_