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 #include "device/udev_linux/scoped_udev.h"
   9
  10 namespace storage_monitor {
  11
  12 std::string GetUdevDevicePropertyValue(udev_device* udev_device,
  13                                        const char* key) {
  14   const char* value = udev_device_get_property_value(udev_device, key);
  15   return value ? value : std::string();
  16 }
  17
  18 bool GetUdevDevicePropertyValueByPath(const base::FilePath& device_path,
  19                                       const char* key,
  20                                       std::string* result) {
  21   device::ScopedUdevPtr udev(udev_new());
  22   if (!udev.get())
  23     return false;
  24   device::ScopedUdevDevicePtr device(udev_device_new_from_syspath(
  25       udev.get(), device_path.value().c_str()));
  26   if (!device.get())
  27     return false;
  28   *result = GetUdevDevicePropertyValue(device.get(), key);
  29   return true;
  30 }
  31
  32 }  // namespace storage_monitor