platform_system_core/metricsd/metricsd_main.cc

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <base/at_exit.h>
#include <base/command_line.h>
#include <base/files/file_path.h>
#include <base/logging.h>
#include <base/strings/string_util.h>
#include <base/time/time.h>
#include <brillo/flag_helper.h>
#include <brillo/syslog_logging.h>

#include "constants.h"
#include "uploader/upload_service.h"


int main(int argc, char** argv) {
  DEFINE_bool(foreground, false, "Don't daemonize");

  // Upload the metrics once and exit. (used for testing)
  DEFINE_bool(uploader_test,
              false,
              "run the uploader once and exit");

  // Upload Service flags.
  DEFINE_int32(upload_interval_secs,
               1800,
               "Interval at which metrics_daemon sends the metrics. (needs "
               "-uploader)");
  DEFINE_string(server,
                metrics::kMetricsServer,
                "Server to upload the metrics to. (needs -uploader)");
  DEFINE_string(metrics_directory,
                metrics::kMetricsDirectory,
                "Root of the configuration files (testing only)");

  DEFINE_bool(logtostderr, false, "Log to standard error");
  DEFINE_bool(logtosyslog, false, "Log to syslog");

  brillo::FlagHelper::Init(argc, argv, "Brillo metrics daemon.");

  int logging_location = (FLAGS_foreground ? brillo::kLogToStderr
                          : brillo::kLogToSyslog);
  if (FLAGS_logtosyslog)
    logging_location = brillo::kLogToSyslog;

  if (FLAGS_logtostderr)
    logging_location = brillo::kLogToStderr;

  // Also log to stderr when not running as daemon.
  brillo::InitLog(logging_location | brillo::kLogHeader);

  if (FLAGS_logtostderr && FLAGS_logtosyslog) {
    LOG(ERROR) << "only one of --logtosyslog and --logtostderr can be set";
    return 1;
  }

  if (!FLAGS_foreground && daemon(0, 0) != 0) {
    return errno;
  }

  UploadService service(FLAGS_server,
                        base::TimeDelta::FromSeconds(FLAGS_upload_interval_secs),
                        base::FilePath(FLAGS_metrics_directory));

  service.Run();
}