1 /*
2  * Copyright (C) 2020 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 #pragma once
18 
19 #include <optional>
20 #include <string>
21 
22 namespace adb {
23 namespace sysdeps {
24 
25 // Attempts to retrieve the environment variable value for |var|. Returns std::nullopt
26 // if unset.
27 std::optional<std::string> GetEnvironmentVariableUTF8(std::string_view var);
28 
29 // Gets the host name of the system. Returns empty string on failure.
30 std::string GetHostNameUTF8();
31 // Gets the current login user. Returns empty string on failure.
32 std::string GetLoginNameUTF8();
33 
34 }  // namespace sysdeps
35 }  // namespace adb
36