1 /*
2  * Copyright 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "metrics/utils.h"
18 
19 #include <base/files/file_util.h>
20 #include <base/strings/string_util.h>
21 
22 namespace bluetooth {
23 namespace metrics {
24 
25 namespace {
26 // The path to the kernel's boot_id.
27 const char kBootIdPath[] = "/proc/sys/kernel/random/boot_id";
28 }  // namespace
29 
GetBootId(std::string * boot_id)30 bool GetBootId(std::string* boot_id) {
31   if (!base::ReadFileToString(base::FilePath(kBootIdPath), boot_id)) {
32     return false;
33   }
34   base::TrimWhitespaceASCII(*boot_id, base::TRIM_TRAILING, boot_id);
35   return true;
36 }
37 
38 }  // namespace metrics
39 }  // namespace bluetooth
40