| // Copyright 2015 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 "remoting/host/logging.h" |
| |
| #include <asl.h> |
| #include <stddef.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "base/logging.h" |
| #include "base/scoped_generic.h" |
| #include "base/strings/string_number_conversions.h" |
| |
| namespace remoting { |
| |
| namespace { |
| |
| const char kChromotingLoggingFacility[] = "org.chromium.chromoting"; |
| |
| // Define a scoper for objects allocated by asl_new. |
| struct ScopedAslMsgTraits { |
| static aslmsg InvalidValue() { |
| return nullptr; |
| } |
| static void Free(aslmsg msg) { |
| asl_free(msg); |
| } |
| }; |
| typedef base::ScopedGeneric<aslmsg, ScopedAslMsgTraits> ScopedAslMsg; |
| |
| // Logging message handler that writes to syslog. |
| // The log can be obtained by running the following in a terminal: |
| // syslog -k Facility org.chromium.chromoting |
| bool LogMessageToAsl( |
| logging::LogSeverity severity, |
| const char* file, |
| int line, |
| size_t message_start, |
| const std::string& message) { |
| int level; |
| switch(severity) { |
| case logging::LOG_INFO: |
| level = ASL_LEVEL_NOTICE; |
| break; |
| case logging::LOG_WARNING: |
| level = ASL_LEVEL_WARNING; |
| break; |
| case logging::LOG_ERROR: |
| case logging::LOG_FATAL: |
| level = ASL_LEVEL_ERR; |
| break; |
| default: |
| // 'notice' is the lowest priority that the asl libraries will log by |
| // default. |
| level = ASL_LEVEL_NOTICE; |
| break; |
| } |
| |
| ScopedAslMsg asl_message(asl_new(ASL_TYPE_MSG)); |
| if (!asl_message.is_valid()) |
| return false; |
| |
| if (asl_set(asl_message.get(), ASL_KEY_FACILITY, |
| kChromotingLoggingFacility) != 0) |
| return false; |
| |
| if (asl_set(asl_message.get(), ASL_KEY_LEVEL, |
| base::IntToString(level).c_str()) != 0) |
| return false; |
| |
| // Restrict read access to the message to root and the current user. |
| if (asl_set(asl_message.get(), ASL_KEY_READ_UID, |
| base::IntToString(geteuid()).c_str()) != 0) |
| return false; |
| |
| if (asl_set(asl_message.get(), ASL_KEY_MSG, |
| message.c_str() + message_start) != 0) |
| return false; |
| |
| asl_send(nullptr, asl_message.get()); |
| |
| // Don't prevent message from being logged by traditional means. |
| return false; |
| } |
| |
| } // namespace |
| |
| void InitHostLogging() { |
| // Write logs to the system debug log. |
| logging::LoggingSettings settings; |
| settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG; |
| logging::InitLogging(settings); |
| |
| // Write logs to syslog as well. |
| logging::SetLogMessageHandler(LogMessageToAsl); |
| } |
| |
| } // namespace remoting |