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
22 using android::base::EqualsIgnoreCase;
23 using android::base::ParseInt;
24 using android::base::ParseUint;
25 using android::base::StartsWith;
26
27 namespace android {
28 namespace init {
29
30 // Builtins and service definitions both have their arguments start at 1 and finish at 3.
ParseRlimit(const std::vector<std::string> & args)31 Result<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 (args[2] == "-1" || args[2] == "unlimited") {
69 limit.rlim_cur = RLIM_INFINITY;
70 } else if (!ParseUint(args[2], &limit.rlim_cur)) {
71 return Error() << "Could not parse soft limit '" << args[2] << "'";
72 }
73
74 if (args[3] == "-1" || args[3] == "unlimited") {
75 limit.rlim_max = RLIM_INFINITY;
76 } else if (!ParseUint(args[3], &limit.rlim_max)) {
77 return Error() << "Could not parse hard limit '" << args[3] << "'";
78 }
79
80 return std::pair{resource, limit};
81 }
82
83 } // namespace init
84 } // namespace android
85