1 // Copyright (C) 2019 The Android Open Source Project
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #define LOG_TAG "FuseUtils"
16
17 #include "include/libfuse_jni/FuseUtils.h"
18
19 #include <string>
20 #include <vector>
21
22 #include "android-base/strings.h"
23
24 using std::string;
25
26 namespace mediaprovider {
27 namespace fuse {
28
containsMount(const string & path,const string & userid)29 bool containsMount(const string& path, const string& userid) {
30 // This method is called from lookup, so it's called rather frequently.
31 // Hence, we avoid concatenating the strings and we use 3 separate suffixes.
32
33 static const string prefix = "/storage/emulated/";
34 if (!android::base::StartsWithIgnoreCase(path, prefix)) {
35 return false;
36 }
37
38 const string& rest_of_path = path.substr(prefix.length());
39 if (!android::base::StartsWithIgnoreCase(rest_of_path, userid)) {
40 return false;
41 }
42
43 static const string android_suffix = "/Android";
44 static const string data_suffix = "/Android/data";
45 static const string obb_suffix = "/Android/obb";
46
47 const string& path_suffix = rest_of_path.substr(userid.length());
48 return android::base::EqualsIgnoreCase(path_suffix, android_suffix) ||
49 android::base::EqualsIgnoreCase(path_suffix, data_suffix) ||
50 android::base::EqualsIgnoreCase(path_suffix, obb_suffix);
51 }
52
53 } // namespace fuse
54 } // namespace mediaprovider
55