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 LOG(INFO) << "Parsing file " << path << "...";
97 Timer t;
98 std::string data;
99 if (!read_file(path, &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 LOG(VERBOSE) << "(Parsing " << path << " took " << t << ".)";
110 return true;
111 }
112
ParseConfigDir(const std::string & path)113 bool Parser::ParseConfigDir(const std::string& path) {
114 LOG(INFO) << "Parsing directory " << path << "...";
115 std::unique_ptr<DIR, int(*)(DIR*)> config_dir(opendir(path.c_str()), closedir);
116 if (!config_dir) {
117 PLOG(ERROR) << "Could not import directory '" << path << "'";
118 return false;
119 }
120 dirent* current_file;
121 std::vector<std::string> files;
122 while ((current_file = readdir(config_dir.get()))) {
123 // Ignore directories and only process regular files.
124 if (current_file->d_type == DT_REG) {
125 std::string current_path =
126 android::base::StringPrintf("%s/%s", path.c_str(), current_file->d_name);
127 files.emplace_back(current_path);
128 }
129 }
130 // Sort first so we load files in a consistent order (bug 31996208)
131 std::sort(files.begin(), files.end());
132 for (const auto& file : files) {
133 if (!ParseConfigFile(file)) {
134 LOG(ERROR) << "could not import file '" << file << "'";
135 }
136 }
137 return true;
138 }
139
ParseConfig(const std::string & path)140 bool Parser::ParseConfig(const std::string& path) {
141 if (is_dir(path.c_str())) {
142 return ParseConfigDir(path);
143 }
144 return ParseConfigFile(path);
145 }
146
DumpState() const147 void Parser::DumpState() const {
148 ServiceManager::GetInstance().DumpState();
149 ActionManager::GetInstance().DumpState();
150 }
151