1 /*
2 * Copyright (C) 2010 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 <dirent.h>
18 #include <errno.h>
19 #include <fcntl.h>
20
21 #include "action.h"
22 #include "init_parser.h"
23 #include "log.h"
24 #include "parser.h"
25 #include "service.h"
26 #include "util.h"
27
28 #include <android-base/stringprintf.h>
29
Parser()30 Parser::Parser() {
31 }
32
GetInstance()33 Parser& Parser::GetInstance() {
34 static Parser instance;
35 return instance;
36 }
37
AddSectionParser(const std::string & name,std::unique_ptr<SectionParser> parser)38 void Parser::AddSectionParser(const std::string& name,
39 std::unique_ptr<SectionParser> parser) {
40 section_parsers_[name] = std::move(parser);
41 }
42
ParseData(const std::string & filename,const std::string & data)43 void Parser::ParseData(const std::string& filename, const std::string& data) {
44 //TODO: Use a parser with const input and remove this copy
45 std::vector<char> data_copy(data.begin(), data.end());
46 data_copy.push_back('\0');
47
48 parse_state state;
49 state.filename = filename.c_str();
50 state.line = 0;
51 state.ptr = &data_copy[0];
52 state.nexttoken = 0;
53
54 SectionParser* section_parser = nullptr;
55 std::vector<std::string> args;
56
57 for (;;) {
58 switch (next_token(&state)) {
59 case T_EOF:
60 if (section_parser) {
61 section_parser->EndSection();
62 }
63 return;
64 case T_NEWLINE:
65 state.line++;
66 if (args.empty()) {
67 break;
68 }
69 if (section_parsers_.count(args[0])) {
70 if (section_parser) {
71 section_parser->EndSection();
72 }
73 section_parser = section_parsers_[args[0]].get();
74 std::string ret_err;
75 if (!section_parser->ParseSection(args, &ret_err)) {
76 parse_error(&state, "%s\n", ret_err.c_str());
77 section_parser = nullptr;
78 }
79 } else if (section_parser) {
80 std::string ret_err;
81 if (!section_parser->ParseLineSection(args, state.filename,
82 state.line, &ret_err)) {
83 parse_error(&state, "%s\n", ret_err.c_str());
84 }
85 }
86 args.clear();
87 break;
88 case T_TEXT:
89 args.emplace_back(state.text);
90 break;
91 }
92 }
93 }
94
ParseConfigFile(const std::string & path)95 bool Parser::ParseConfigFile(const std::string& path) {
96 INFO("Parsing file %s...\n", path.c_str());
97 Timer t;
98 std::string data;
99 if (!read_file(path.c_str(), &data)) {
100 return false;
101 }
102
103 data.push_back('\n'); // TODO: fix parse_config.
104 ParseData(path, data);
105 for (const auto& sp : section_parsers_) {
106 sp.second->EndFile(path);
107 }
108
109 // Turning this on and letting the INFO logging be discarded adds 0.2s to
110 // Nexus 9 boot time, so it's disabled by default.
111 if (false) DumpState();
112
113 NOTICE("(Parsing %s took %.2fs.)\n", path.c_str(), t.duration());
114 return true;
115 }
116
ParseConfigDir(const std::string & path)117 bool Parser::ParseConfigDir(const std::string& path) {
118 INFO("Parsing directory %s...\n", path.c_str());
119 std::unique_ptr<DIR, int(*)(DIR*)> config_dir(opendir(path.c_str()), closedir);
120 if (!config_dir) {
121 ERROR("Could not import directory '%s'\n", path.c_str());
122 return false;
123 }
124 dirent* current_file;
125 while ((current_file = readdir(config_dir.get()))) {
126 std::string current_path =
127 android::base::StringPrintf("%s/%s", path.c_str(), current_file->d_name);
128 // Ignore directories and only process regular files.
129 if (current_file->d_type == DT_REG) {
130 if (!ParseConfigFile(current_path)) {
131 ERROR("could not import file '%s'\n", current_path.c_str());
132 }
133 }
134 }
135 return true;
136 }
137
ParseConfig(const std::string & path)138 bool Parser::ParseConfig(const std::string& path) {
139 if (is_dir(path.c_str())) {
140 return ParseConfigDir(path);
141 }
142 return ParseConfigFile(path);
143 }
144
DumpState() const145 void Parser::DumpState() const {
146 ServiceManager::GetInstance().DumpState();
147 ActionManager::GetInstance().DumpState();
148 }
149