75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
//
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// Copyright (C) 2012 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 <xz.h>
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#include <base/at_exit.h>
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#include <base/command_line.h>
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#include <base/logging.h>
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#include <brillo/flag_helper.h>
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#include "update_engine/common/daemon_base.h"
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#include "update_engine/common/logging.h"
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#include "update_engine/common/subprocess.h"
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#include "update_engine/common/terminator.h"
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#include "update_engine/common/utils.h"
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using std::string;
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int main(int argc, char** argv) {
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DEFINE_bool(logtofile, false, "Write logs to a file in log_dir.");
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DEFINE_bool(logtostderr,
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false,
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"Write logs to stderr instead of to a file in log_dir.");
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DEFINE_bool(foreground, false, "Don't daemon()ize; run in foreground.");
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chromeos_update_engine::Terminator::Init();
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brillo::FlagHelper::Init(argc, argv, "A/B Update Engine");
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// We have two logging flags "--logtostderr" and "--logtofile"; and the logic
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// to choose the logging destination is:
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// 1. --logtostderr --logtofile -> logs to both
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// 2. --logtostderr -> logs to system debug
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// 3. --logtofile or no flags -> logs to file
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bool log_to_system = FLAGS_logtostderr;
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bool log_to_file = FLAGS_logtofile || !FLAGS_logtostderr;
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chromeos_update_engine::SetupLogging(log_to_system, log_to_file);
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if (!FLAGS_foreground)
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PLOG_IF(FATAL, daemon(0, 0) == 1) << "daemon() failed";
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LOG(INFO) << "A/B Update Engine starting";
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// xz-embedded requires to initialize its CRC-32 table once on startup.
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xz_crc32_init();
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// Ensure that all written files have safe permissions.
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// This is a mask, so we _block_ all permissions for the group owner and other
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// users but allow all permissions for the user owner. We allow execution
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// for the owner so we can create directories.
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// Done _after_ log file creation.
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umask(S_IRWXG | S_IRWXO);
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auto daemon = chromeos_update_engine::DaemonBase::CreateInstance();
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int exit_code = daemon->Run();
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chromeos_update_engine::Subprocess::Get().FlushBufferedLogsAtExit();
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LOG(INFO) << "A/B Update Engine terminating with exit code " << exit_code;
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return exit_code;
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}
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