blob: b9c32bb9f30fb6c83a65cb227274f98ca04c5d42 [file] [log] [blame]
// Copyright (c) 2009 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 <base/at_exit.h>
#include <base/command_line.h>
#include <base/logging.h>
#include <base/strings/string_util.h>
#include <brillo/flag_helper.h>
#include <brillo/syslog_logging.h>
#include <rootdev/rootdev.h>
#include "metrics/metrics_daemon.h"
namespace {
const char kPersistentIntegerBackingDir[] = "/var/lib/metrics";
const char kScalingMaxFreqPath[] =
const char kCpuinfoMaxFreqPath[] =
// Returns the path to the disk stats in the sysfs. Returns the null string if
// it cannot find the disk stats file.
const std::string MetricsMainDiskStatsPath() {
char dev_path_cstr[PATH_MAX];
std::string dev_prefix = "/dev/";
std::string dev_path;
std::string dev_name;
int ret = rootdev(dev_path_cstr, sizeof(dev_path_cstr), true, true);
if (ret != 0) {
LOG(WARNING) << "error " << ret << " determining root device";
return "";
dev_path = dev_path_cstr;
// Check that rootdev begins with "/dev/".
if (!base::StartsWith(dev_path, dev_prefix, base::CompareCase::SENSITIVE)) {
LOG(WARNING) << "unexpected root device " << dev_path;
return "";
// Get the device name, e.g. "sda" from "/dev/sda".
dev_name = dev_path.substr(dev_prefix.length());
return "/sys/class/block/" + dev_name + "/stat";
} // namespace
int main(int argc, char** argv) {
DEFINE_bool(daemon, true, "run as daemon (use -nodaemon for debugging)");
// The uploader is disabled by default on ChromeOS as Chrome is responsible
// for sending the metrics.
DEFINE_bool(uploader, false, "activate the uploader");
// 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 "
DEFINE_string(server, "",
"Server to upload the metrics to. (needs -uploader)");
DEFINE_string(metrics_file, "/var/lib/metrics/uma-events",
"File to use as a proxy for uploading the metrics");
DEFINE_string(config_root, "/",
"Root of the configuration files (testing only)");
brillo::FlagHelper::Init(argc, argv, "Chromium OS Metrics Daemon");
// Also log to stderr when not running as daemon on a TTY.
brillo::InitLog(brillo::kLogToSyslog | brillo::kLogHeader |
(FLAGS_daemon ? 0 : brillo::kLogToStderrIfTty));
if (FLAGS_daemon && daemon(0, 0) != 0) {
return errno;
base::FilePath backing_dir_path(kPersistentIntegerBackingDir);
MetricsLibrary metrics_lib;
chromeos_metrics::MetricsDaemon daemon;
daemon.Init(FLAGS_uploader_test, FLAGS_uploader | FLAGS_uploader_test,
&metrics_lib, MetricsMainDiskStatsPath(), "/proc/vmstat",
kScalingMaxFreqPath, kCpuinfoMaxFreqPath,
FLAGS_server, FLAGS_metrics_file, FLAGS_config_root,
if (FLAGS_uploader_test) {
return 0;