1// Copyright (c) 2012 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#include "chrome/browser/storage_monitor/udev_util_linux.h"
6
7#include "base/files/file_path.h"
8
9void UdevDeleter::operator()(struct udev* udev) {
10  udev_unref(udev);
11}
12
13void UdevDeviceDeleter::operator()(struct udev_device* device) {
14  udev_device_unref(device);
15}
16
17std::string GetUdevDevicePropertyValue(struct udev_device* udev_device,
18                                       const char* key) {
19  const char* value = udev_device_get_property_value(udev_device, key);
20  return value ? value : std::string();
21}
22
23bool GetUdevDevicePropertyValueByPath(const base::FilePath& device_path,
24                                      const char* key,
25                                      std::string* result) {
26  ScopedUdevObject udev(udev_new());
27  if (!udev.get())
28    return false;
29  ScopedUdevDeviceObject device(udev_device_new_from_syspath(
30      udev.get(), device_path.value().c_str()));
31  if (!device.get())
32    return false;
33  *result = GetUdevDevicePropertyValue(device.get(), key);
34  return true;
35}
36