| // Copyright 2023 The ChromiumOS Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "brillo/udev/utils.h" |
| |
| #include <memory> |
| |
| namespace brillo { |
| |
| namespace { |
| |
| constexpr char kRemovableAttr[] = "removable"; |
| |
| bool ContainsRemovableAttribute(const brillo::UdevDevice& device) { |
| const char* value = device.GetSysAttributeValue(kRemovableAttr); |
| return value && strncmp(value, "1", 1) == 0; |
| } |
| |
| } // namespace |
| |
| bool IsRemovable(const brillo::UdevDevice& device) { |
| if (ContainsRemovableAttribute(device)) { |
| return true; |
| } |
| // Check if any of the parents are removable. From USB devices the parent node |
| // `/dev/sda` is removable, while a node like `/dev/sda1` would not have this |
| // property. |
| for (std::unique_ptr<brillo::UdevDevice> parent = device.GetParent(); parent; |
| parent = parent->GetParent()) { |
| if (ContainsRemovableAttribute(*parent)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } // namespace brillo |
