b7349902a9
Create a Parser class that uses multiple SectionParser interfaces to handle parsing the different sections of an init rc. Create an ActionParser and ServiceParser that implement SectionParser and parse the sections corresponding to Action and Service classes. Remove the legacy keyword structure and replace it with std::map's that map keyword -> (minimum args, maximum args, function pointer) for Commands and Service Options. Create an ImportParser that implements SectionParser and handles the import 'section'. Clean up the unsafe memory handling of the Action class by using std::unique_ptr. Change-Id: Ic5ea5510cb956dbc3f78745a35096ca7d6da7085
145 lines
4.3 KiB
C++
145 lines
4.3 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "action.h"
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#include "init_parser.h"
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#include "log.h"
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#include "parser.h"
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#include "service.h"
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#include "util.h"
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#include <base/stringprintf.h>
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Parser::Parser() {
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}
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Parser& Parser::GetInstance() {
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static Parser instance;
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return instance;
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}
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void Parser::AddSectionParser(const std::string& name,
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std::unique_ptr<SectionParser> parser) {
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section_parsers_[name] = std::move(parser);
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}
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void Parser::ParseData(const std::string& filename, const std::string& data) {
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//TODO: Use a parser with const input and remove this copy
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std::vector<char> data_copy(data.begin(), data.end());
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data_copy.push_back('\0');
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parse_state state;
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state.filename = filename.c_str();
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state.line = 0;
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state.ptr = &data_copy[0];
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state.nexttoken = 0;
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SectionParser* section_parser = nullptr;
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std::vector<std::string> args;
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for (;;) {
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switch (next_token(&state)) {
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case T_EOF:
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if (section_parser) {
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section_parser->EndSection();
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}
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return;
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case T_NEWLINE:
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state.line++;
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if (args.empty()) {
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break;
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}
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if (section_parsers_.count(args[0])) {
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if (section_parser) {
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section_parser->EndSection();
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}
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section_parser = section_parsers_[args[0]].get();
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std::string ret_err;
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if (!section_parser->ParseSection(args, &ret_err)) {
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parse_error(&state, "%s\n", ret_err.c_str());
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section_parser = nullptr;
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}
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} else if (section_parser) {
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std::string ret_err;
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if (!section_parser->ParseLineSection(args, state.filename,
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state.line, &ret_err)) {
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parse_error(&state, "%s\n", ret_err.c_str());
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}
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}
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args.clear();
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break;
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case T_TEXT:
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args.emplace_back(state.text);
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break;
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}
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}
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}
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bool Parser::ParseConfigFile(const std::string& path) {
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INFO("Parsing file %s...\n", path.c_str());
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Timer t;
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std::string data;
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if (!read_file(path.c_str(), &data)) {
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return false;
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}
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data.push_back('\n'); // TODO: fix parse_config.
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ParseData(path, data);
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for (const auto& sp : section_parsers_) {
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sp.second->EndFile(path);
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}
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DumpState();
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NOTICE("(Parsing %s took %.2fs.)\n", path.c_str(), t.duration());
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return true;
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}
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bool Parser::ParseConfigDir(const std::string& path) {
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INFO("Parsing directory %s...\n", path.c_str());
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std::unique_ptr<DIR, int(*)(DIR*)> config_dir(opendir(path.c_str()), closedir);
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if (!config_dir) {
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ERROR("Could not import directory '%s'\n", path.c_str());
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return false;
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}
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dirent* current_file;
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while ((current_file = readdir(config_dir.get()))) {
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std::string current_path =
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android::base::StringPrintf("%s/%s", path.c_str(), current_file->d_name);
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// Ignore directories and only process regular files.
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if (current_file->d_type == DT_REG) {
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if (!ParseConfigFile(current_path)) {
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ERROR("could not import file '%s'\n", current_path.c_str());
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}
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}
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}
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return true;
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}
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bool Parser::ParseConfig(const std::string& path) {
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if (is_dir(path.c_str())) {
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return ParseConfigDir(path);
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}
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return ParseConfigFile(path);
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}
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void Parser::DumpState() const {
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ServiceManager::GetInstance().DumpState();
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ActionManager::GetInstance().DumpState();
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}
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