components/storage_monitor/udev_util_linux.cc

   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 #include "components/storage_monitor/udev_util_linux.h"
   6
   7 #include "base/files/file_path.h"
   8
   9 namespace storage_monitor {
  10
  11 void UdevDeleter::operator()(struct udev* udev) {
  12   udev_unref(udev);
  13 }
  14
  15 void UdevDeviceDeleter::operator()(struct udev_device* device) {
  16   udev_device_unref(device);
  17 }
  18
  19 std::string GetUdevDevicePropertyValue(struct udev_device* udev_device,
  20                                        const char* key) {
  21   const char* value = udev_device_get_property_value(udev_device, key);
  22   return value ? value : std::string();
  23 }
  24
  25 bool GetUdevDevicePropertyValueByPath(const base::FilePath& device_path,
  26                                       const char* key,
  27                                       std::string* result) {
  28   ScopedUdevObject udev(udev_new());
  29   if (!udev.get())
  30     return false;
  31   ScopedUdevDeviceObject device(udev_device_new_from_syspath(
  32       udev.get(), device_path.value().c_str()));
  33   if (!device.get())
  34     return false;
  35   *result = GetUdevDevicePropertyValue(device.get(), key);
  36   return true;
  37 }
  38
  39 }  // namespace storage_monitor