1 /*
2  * Copyright (C) 2017 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 "directory.h"
18 #include "server.h"
19 
20 template<typename IntTy>
asNumber(const std::string & s,IntTy * value)21 static bool asNumber(const std::string& s, IntTy *value) {
22     IntTy v = 0;
23     for (auto&& c : s) {
24         if (c < '0' || c > '9') {
25             return false;
26         } else {
27             v = v * 10 + (c - '0');
28         }
29     }
30 
31     if (value) *value = v;
32 
33     return true;
34 }
35 
readProcessTable()36 std::vector<procfsinspector::ProcessInfo> procfsinspector::Impl::readProcessTable() {
37     std::vector<procfsinspector::ProcessInfo> processes;
38 
39     Directory dir("/proc");
40     while (auto entry = dir.next()) {
41         pid_t pid;
42         if (asNumber(entry.getChild(), &pid)) {
43             processes.push_back(ProcessInfo{pid, entry.getOwnerUserId()});
44         }
45     }
46 
47     return processes;
48 }
49