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92 lines
3.0 KiB
92 lines
3.0 KiB
4 months ago
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// Copyright (C) 2020 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 <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string>
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#include <base/files/file_util.h>
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#include <base/logging.h>
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#include <base/strings/string_util.h>
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#include <base/strings/stringprintf.h>
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#include "update_engine/common/logging.h"
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#include "update_engine/common/utils.h"
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using std::string;
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namespace chromeos_update_engine {
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namespace {
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constexpr char kSystemLogsRoot[] = "/var/log";
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void SetupLogSymlink(const string& symlink_path, const string& log_path) {
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// TODO(petkov): To ensure a smooth transition between non-timestamped and
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// timestamped logs, move an existing log to start the first timestamped
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// one. This code can go away once all clients are switched to this version or
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// we stop caring about the old-style logs.
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if (utils::FileExists(symlink_path.c_str()) &&
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!utils::IsSymlink(symlink_path.c_str())) {
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base::ReplaceFile(
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base::FilePath(symlink_path), base::FilePath(log_path), nullptr);
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}
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base::DeletePathRecursively(base::FilePath(symlink_path));
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if (symlink(log_path.c_str(), symlink_path.c_str()) == -1) {
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PLOG(ERROR) << "Unable to create symlink " << symlink_path
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<< " pointing at " << log_path;
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}
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}
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string SetupLogFile(const string& kLogsRoot) {
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const string kLogSymlink = kLogsRoot + "/update_engine.log";
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const string kLogsDir = kLogsRoot + "/update_engine";
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const string kLogPath =
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base::StringPrintf("%s/update_engine.%s",
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kLogsDir.c_str(),
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utils::GetTimeAsString(::time(nullptr)).c_str());
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mkdir(kLogsDir.c_str(), 0755);
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SetupLogSymlink(kLogSymlink, kLogPath);
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return kLogSymlink;
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}
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} // namespace
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void SetupLogging(bool log_to_system, bool log_to_file) {
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logging::LoggingSettings log_settings;
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log_settings.lock_log = logging::DONT_LOCK_LOG_FILE;
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log_settings.logging_dest = static_cast<logging::LoggingDestination>(
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(log_to_system ? logging::LOG_TO_SYSTEM_DEBUG_LOG : 0) |
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(log_to_file ? logging::LOG_TO_FILE : 0));
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log_settings.log_file = nullptr;
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string log_file;
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if (log_to_file) {
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log_file = SetupLogFile(kSystemLogsRoot);
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log_settings.delete_old = logging::APPEND_TO_OLD_LOG_FILE;
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#if BASE_VER < 780000
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log_settings.log_file = log_file.c_str();
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#else
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log_settings.log_file_path = log_file.c_str();
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#endif
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}
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logging::InitLogging(log_settings);
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}
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} // namespace chromeos_update_engine
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