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/*
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* Copyright (C) 2018 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 <vintf/FileSystem.h>
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#include <dirent.h>
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#include <fstream>
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#include <iostream>
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#include <sstream>
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namespace android {
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namespace vintf {
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namespace details {
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status_t FileSystemImpl::fetch(const std::string& path, std::string* fetched,
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std::string* error) const {
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std::ifstream in;
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errno = 0;
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in.open(path);
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if (!in || errno != 0) {
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if (error) {
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*error = "Cannot open " + path + ": " + strerror(errno);
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}
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return -errno;
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}
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std::stringstream ss;
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ss << in.rdbuf();
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*fetched = ss.str();
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return -errno;
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}
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status_t FileSystemImpl::listFiles(const std::string& path, std::vector<std::string>* out,
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std::string* error) const {
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errno = 0;
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DIR* dirp = opendir(path.c_str());
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if (!dirp || errno != 0) {
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if (error) {
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*error = "Cannot open " + path + ": " + strerror(errno);
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}
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return -errno;
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}
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std::unique_ptr<DIR, decltype(&closedir)> dir(dirp, closedir);
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dirent* dp;
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while ((dp = readdir(dir.get())) != nullptr) {
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if (dp->d_type != DT_DIR) {
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out->push_back(dp->d_name);
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}
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}
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return -errno;
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}
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status_t FileSystemNoOp::fetch(const std::string&, std::string*, std::string*) const {
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return NAME_NOT_FOUND;
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}
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status_t FileSystemNoOp::listFiles(const std::string&, std::vector<std::string>*,
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std::string*) const {
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return NAME_NOT_FOUND;
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}
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FileSystemUnderPath::FileSystemUnderPath(const std::string& rootdir) {
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mRootDir = rootdir;
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if (!mRootDir.empty() && mRootDir.back() != '/') {
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mRootDir.push_back('/');
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}
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}
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status_t FileSystemUnderPath::fetch(const std::string& path, std::string* fetched,
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std::string* error) const {
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return mImpl.fetch(mRootDir + path, fetched, error);
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}
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status_t FileSystemUnderPath::listFiles(const std::string& path, std::vector<std::string>* out,
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std::string* error) const {
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return mImpl.listFiles(mRootDir + path, out, error);
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}
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const std::string& FileSystemUnderPath::getRootDir() const {
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return mRootDir;
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}
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} // namespace details
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} // namespace vintf
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} // namespace android
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