chrome/browser/chromeos/logging.cc

// Copyright 2017 The Chromium 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 "chrome/browser/chromeos/logging.h"

#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "chrome/common/logging_chrome.h"

namespace logging {

void RedirectChromeLogging(const base::CommandLine& command_line) {
  // This should be true for exactly the period between the end of
  // InitChromeLogging() and the beginning of CleanupChromeLogging().
  static bool chrome_logging_redirected_ = false;
  if (chrome_logging_redirected_) {
    // TODO: Support multiple active users. http://crbug.com/230345
    LOG(WARNING) << "NOT redirecting logging for multi-profiles case.";
    return;
  }

  DCHECK(!chrome_logging_redirected_)
      << "Attempted to redirect logging when it was already initialized.";

  // Redirect logs to the session log directory, if set.  Otherwise
  // defaults to the profile dir.
  const base::FilePath log_path = GetSessionLogFile(command_line);

  // Always force a new symlink when redirecting.
  const base::FilePath target_path = SetUpSymlinkIfNeeded(log_path, true);

  // ChromeOS always logs through the symlink, so it shouldn't be
  // deleted if it already exists.
  logging::LoggingSettings settings;
  settings.logging_dest = DetermineLoggingDestination(command_line);
  settings.log_file = log_path.value().c_str();
  if (!logging::InitLogging(settings)) {
    DLOG(ERROR) << "Unable to initialize logging to " << log_path.value();
    RemoveSymlinkAndLog(log_path, target_path);
  } else {
    chrome_logging_redirected_ = true;
  }
}

}  // namespace logging