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// Copyright 2014 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <brillo/osrelease_reader.h>
#include <base/files/file_enumerator.h>
#include <base/files/file_util.h>
#include <base/logging.h>
#include <brillo/strings/string_utils.h>
namespace brillo {
void OsReleaseReader::Load() {
Load(base::FilePath("/"));
}
bool OsReleaseReader::GetString(const std::string& key,
std::string* value) const {
CHECK(initialized_) << "OsReleaseReader.Load() must be called first.";
return store_.GetString(key, value);
}
void OsReleaseReader::LoadTestingOnly(const base::FilePath& root_dir) {
Load(root_dir);
}
void OsReleaseReader::Load(const base::FilePath& root_dir) {
base::FilePath osrelease = root_dir.Append("etc").Append("os-release");
if (!store_.Load(osrelease)) {
// /etc/os-release might not be present (cros deploying a new configuration
// or no fields set at all). Just print a debug message and continue.
DLOG(INFO) << "Could not load fields from " << osrelease.value();
}
base::FilePath osreleased = root_dir.Append("etc").Append("os-release.d");
base::FileEnumerator enumerator(
osreleased, false, base::FileEnumerator::FILES);
for (base::FilePath path = enumerator.Next(); !path.empty();
path = enumerator.Next()) {
std::string content;
if (!base::ReadFileToString(path, &content)) {
// The only way to fail is if a file exist in /etc/os-release.d but we
// cannot read it.
PLOG(FATAL) << "Could not read " << path.value();
}
// There might be a trailing new line. Strip it to keep only the first line
// of the file.
content = brillo::string_utils::SplitAtFirst(content, "\n", true).first;
store_.SetString(path.BaseName().value(), content);
}
initialized_ = true;
}
} // namespace brillo
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