src/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 void UdevDeleter::operator()(struct udev* udev) {
  10   udev_unref(udev);
  11 }
  12
  13 void UdevDeviceDeleter::operator()(struct udev_device* device) {
  14   udev_device_unref(device);
  15 }
  16
  17 std::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
  23 bool 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 }