syslog_logging.cc | Explore in Territory

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/syslog_logging.h"

#include "build/build_config.h"

#if BUILDFLAG(IS_WIN)
// clang-format off
#include <windows.h>  // Must be in front of other Windows header files.
// clang-format on

#include <sddl.h>

#include "base/debug/stack_trace.h"
#include "base/strings/string_util.h"
#include "base/win/scoped_handle.h"
#include "base/win/win_util.h"
#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
// <syslog.h> defines LOG_INFO, LOG_WARNING macros that could conflict with
// base::LOG_INFO, base::LOG_WARNING.
#include <syslog.h>
#undef LOG_INFO
#undef LOG_WARNING
#endif

#include <ostream>
#include <string>

namespace logging {

namespace {

// The syslog logging is on by default, but tests or fuzzers can disable it.
bool g_logging_enabled = …;

}  // namespace

#if BUILDFLAG(IS_WIN)

namespace {

std::string* g_event_source_name = nullptr;
uint16_t g_category = 0;
uint32_t g_event_id = 0;
std::wstring* g_user_sid = nullptr;

class EventLogHandleTraits {
 public:
  using Handle = HANDLE;

  EventLogHandleTraits() = delete;
  EventLogHandleTraits(const EventLogHandleTraits&) = delete;
  EventLogHandleTraits& operator=(const EventLogHandleTraits&) = delete;

  // Closes the handle.
  static bool CloseHandle(HANDLE handle) {
    return ::DeregisterEventSource(handle) != FALSE;
  }

  // Returns true if the handle value is valid.
  static bool IsHandleValid(HANDLE handle) { return handle != nullptr; }

  // Returns null handle value.
  static HANDLE NullHandle() { return nullptr; }
};

using ScopedEventLogHandle =
    base::win::GenericScopedHandle<EventLogHandleTraits,
                                   base::win::DummyVerifierTraits>;

}  // namespace

void SetEventSource(const std::string& name,
                    uint16_t category,
                    uint32_t event_id) {
  DCHECK_EQ(nullptr, g_event_source_name);
  g_event_source_name = new std::string(name);
  g_category = category;
  g_event_id = event_id;
  DCHECK_EQ(nullptr, g_user_sid);
  g_user_sid = new std::wstring();
  base::win::GetUserSidString(g_user_sid);
}

void ResetEventSourceForTesting() {
  delete g_event_source_name;
  g_event_source_name = nullptr;
  delete g_user_sid;
  g_user_sid = nullptr;
}

#endif  // BUILDFLAG(IS_WIN)

EventLogMessage::EventLogMessage(const char* file,
                                 int line,
                                 LogSeverity severity)
    : … { … }

EventLogMessage::~EventLogMessage() { … }

void SetSyslogLoggingForTesting(bool logging_enabled) { … }

}  // namespace logging
chromium/base/syslog_logging.cc
