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 "rlimit_parser.h"
18
19#include <android-base/parseint.h>
20#include <android-base/strings.h>
21
22using android::base::EqualsIgnoreCase;
23using android::base::ParseInt;
24using android::base::ParseUint;
25using android::base::StartsWith;
26
27namespace android {
28namespace init {
29
30// Builtins and service definitions both have their arguments start at 1 and finish at 3.
31Result<std::pair<int, rlimit>> ParseRlimit(const std::vector<std::string>& args) {
32    static const std::vector<std::pair<const char*, int>> text_to_resources = {
33        {"cpu", 0},       {"fsize", 1}, {"data", 2},    {"stack", 3},
34        {"core", 4},      {"rss", 5},   {"nproc", 6},   {"nofile", 7},
35        {"memlock", 8},   {"as", 9},    {"locks", 10},  {"sigpending", 11},
36        {"msgqueue", 12}, {"nice", 13}, {"rtprio", 14}, {"rttime", 15},
37    };
38
39    int resource;
40
41    if (ParseInt(args[1], &resource)) {
42        if (resource >= RLIM_NLIMITS) {
43            return Error() << "Resource '" << args[1] << "' over the maximum resource value '"
44                           << RLIM_NLIMITS << "'";
45        } else if (resource < 0) {
46            return Error() << "Resource '" << args[1] << "' below the minimum resource value '0'";
47        }
48    } else {
49        std::string resource_string;
50        if (StartsWith(args[1], "RLIM_")) {
51            resource_string = args[1].substr(5);
52        } else {
53            resource_string = args[1];
54        }
55
56        auto it = std::find_if(text_to_resources.begin(), text_to_resources.end(),
57                               [&resource_string](const auto& entry) {
58                                   return EqualsIgnoreCase(resource_string, entry.first);
59                               });
60        if (it == text_to_resources.end()) {
61            return Error() << "Could not parse resource '" << args[1] << "'";
62        }
63
64        resource = it->second;
65    }
66
67    rlimit limit;
68    if (!ParseUint(args[2], &limit.rlim_cur)) {
69        return Error() << "Could not parse soft limit '" << args[2] << "'";
70    }
71    if (!ParseUint(args[3], &limit.rlim_max)) {
72        return Error() << "Could not parse hard limit '" << args[3] << "'";
73    }
74    return {resource, limit};
75}
76
77}  // namespace init
78}  // namespace android
79