blob: ffe74f2a77d65e566ec47bd2189ca97b1254cc2d [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/command_line.h>
#include <base/logging.h>
#include <base/strings/string_util.h>
#include <chromeos/syslog_logging.h>
#include <gflags/gflags.h>
#include <rootdev/rootdev.h>
#include "metrics_daemon.h"
const char kScalingMaxFreqPath[] =
const char kCpuinfoMaxFreqPath[] =
DEFINE_bool(daemon, true, "run as daemon (use -nodaemon for debugging)");
// 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 (!StartsWithASCII(dev_path, dev_prefix, false)) {
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";
int main(int argc, char** argv) {
CommandLine::Init(argc, argv);
google::ParseCommandLineFlags(&argc, &argv, true);
// Also log to stderr when not running as daemon.
chromeos::InitLog(chromeos::kLogToSyslog | chromeos::kLogHeader |
(FLAGS_daemon ? 0 : chromeos::kLogToStderr));
MetricsLibrary metrics_lib;
MetricsDaemon daemon;
daemon.Init(false, &metrics_lib, MetricsMainDiskStatsPath(),
"/proc/vmstat", kScalingMaxFreqPath, kCpuinfoMaxFreqPath);