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", RLIMIT_CPU}, {"fsize", RLIMIT_FSIZE},
34 {"data", RLIMIT_DATA}, {"stack", RLIMIT_STACK},
35 {"core", RLIMIT_CORE}, {"rss", RLIMIT_RSS},
36 {"nproc", RLIMIT_NPROC}, {"nofile", RLIMIT_NOFILE},
37 {"memlock", RLIMIT_MEMLOCK}, {"as", RLIMIT_AS},
38 {"locks", RLIMIT_LOCKS}, {"sigpending", RLIMIT_SIGPENDING},
39 {"msgqueue", RLIMIT_MSGQUEUE}, {"nice", RLIMIT_NICE},
40 {"rtprio", RLIMIT_RTPRIO}, {"rttime", RLIMIT_RTTIME},
41 };
42
43 int resource;
44
45 if (ParseInt(args[1], &resource)) {
46 if (resource >= RLIM_NLIMITS) {
47 return Error() << "Resource '" << args[1] << "' over the maximum resource value '"
48 << RLIM_NLIMITS << "'";
49 } else if (resource < 0) {
50 return Error() << "Resource '" << args[1] << "' below the minimum resource value '0'";
51 }
52 } else {
53 std::string resource_string;
54 if (StartsWith(args[1], "RLIM_")) {
55 resource_string = args[1].substr(5);
56 } else if (StartsWith(args[1], "RLIMIT_")) {
57 resource_string = args[1].substr(7);
58 } else {
59 resource_string = args[1];
60 }
61
62 auto it = std::find_if(text_to_resources.begin(), text_to_resources.end(),
63 [&resource_string](const auto& entry) {
64 return EqualsIgnoreCase(resource_string, entry.first);
65 });
66 if (it == text_to_resources.end()) {
67 return Error() << "Could not parse resource '" << args[1] << "'";
68 }
69
70 resource = it->second;
71 }
72
73 rlimit limit;
74 if (args[2] == "-1" || args[2] == "unlimited") {
75 limit.rlim_cur = RLIM_INFINITY;
76 } else if (!ParseUint(args[2], &limit.rlim_cur)) {
77 return Error() << "Could not parse soft limit '" << args[2] << "'";
78 }
79
80 if (args[3] == "-1" || args[3] == "unlimited") {
81 limit.rlim_max = RLIM_INFINITY;
82 } else if (!ParseUint(args[3], &limit.rlim_max)) {
83 return Error() << "Could not parse hard limit '" << args[3] << "'";
84 }
85
86 return std::pair{resource, limit};
87 }
88
89 } // namespace init
90 } // namespace android
91