/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2022 Sadie Powell <sadie@witchery.services>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "inspircd.h"
const char* Log::LevelToString(Log::Level level)
{
switch (level)
{
case Log::Level::ERROR:
return "error";
case Log::Level::WARNING:
return "warning";
case Log::Level::NORMAL:
return "normal";
case Log::Level::DEBUG:
return "debug";
case Log::Level::RAWIO:
return "rawio";
}
// Should never happen.
return "unknown";
}
Log::FileMethod::FileMethod(const std::string& n, FILE* fh, unsigned long fl, bool ac)
: Timer(15*60, true)
, autoclose(ac)
, file(fh)
, flush(fl)
, name(n)
{
if (flush > 1)
ServerInstance->Timers.AddTimer(this);
}
Log::FileMethod::~FileMethod()
{
if (autoclose)
fclose(file);
}
void Log::FileMethod::OnLog(time_t time, Level level, const std::string& type, const std::string& message)
{
static time_t prevtime = 0;
static std::string timestr;
if (prevtime != time)
{
prevtime = time;
timestr = InspIRCd::TimeString(prevtime);
}
fputs(timestr.c_str(), file);
fputs(" ", file);
fputs(type.c_str(), file);
fputs(": ", file);
fputs(message.c_str(), file);
#if defined _WIN32
fputs("\r\n", file);
#else
fputs("\n", file);
#endif
if (!(++lines % flush))
fflush(file);
if (ferror(file))
throw CoreException(InspIRCd::Format("Unable to write to %s: %s", name.c_str(), strerror(errno)));
}
bool Log::FileMethod::Tick()
{
fflush(file);
return true;
}
Log::Engine::Engine(Module* Creator, const std::string& Name)
: DataProvider(Creator, "log/" + Name)
{
}
Log::Engine::~Engine()
{
if (creator)
ServerInstance->Logs.UnloadEngine(this);
}
Log::FileEngine::FileEngine(Module* Creator)
: Engine(Creator, "file")
{
}
Log::MethodPtr Log::FileEngine::Create(std::shared_ptr<ConfigTag> tag)
{
const std::string target = tag->getString("target");
if (target.empty())
throw CoreException("<log:target> must be specified for file logger at " + tag->source.str());
const std::string fulltarget = ServerInstance->Config->Paths.PrependLog(InspIRCd::TimeString(ServerInstance->Time(), target.c_str()));
auto fh = fopen(fulltarget.c_str(), "a");
if (!fh)
{
throw CoreException(InspIRCd::Format("Unable to open %s for file logger at %s: %s",
fulltarget.c_str(), tag->source.str().c_str(), strerror(errno)));
}
const unsigned long flush = tag->getUInt("flush", 20, 1);
return std::make_shared<FileMethod>(fulltarget, fh, flush, true);
}
Log::StreamEngine::StreamEngine(Module* Creator, const std::string& Name, FILE* fh)
: Engine(Creator, Name)
, file(fh)
{
}
Log::MethodPtr Log::StreamEngine::Create(std::shared_ptr<ConfigTag> tag)
{
return std::make_shared<FileMethod>(name, file, 1, false);
}
Log::Manager::CachedMessage::CachedMessage(time_t ts, Level l, const std::string& t, const std::string& m)
: time(ts)
, level(l)
, type(t)
, message(m)
{
}
Log::Manager::Info::Info(Level l, TokenList t, MethodPtr m, bool c, const Engine* e)
: config(c)
, level(l)
, types(std::move(t))
, method(std::move(m))
, engine(e)
{
}
Log::Manager::Manager()
: filelog(nullptr)
, stderrlog(nullptr, "stderr", stderr)
, stdoutlog(nullptr, "stdout", stdout)
{
}
void Log::Manager::CloseLogs()
{
logging = true; // Prevent writing to dying loggers.
loggers.erase(std::remove_if(loggers.begin(), loggers.end(), [](const Info& info) { return info.config; }), loggers.end());
logging = false;
}
void Log::Manager::EnableDebugMode()
{
TokenList types = std::string("*");
MethodPtr method = stdoutlog.Create(ServerInstance->Config->EmptyTag);
loggers.emplace_back(Level::RAWIO, std::move(types), std::move(method), false, &stdoutlog);
}
void Log::Manager::OpenLogs(bool requiremethods)
{
// If the server is started in debug mode we don't write logs.
if (ServerInstance->Config->cmdline.forcedebug)
{
Normal("LOG", "Not opening loggers because we were started with --debug");
ServerInstance->Config->RawLog = true;
return;
}
// If the server is started with logging disabled we don't write logs.
if (!ServerInstance->Config->cmdline.writelog)
{
Normal("LOG", "Not opening loggers because we were started with --nolog");
return;
}
for (const auto& [_, tag] : ServerInstance->Config->ConfTags("log"))
{
const std::string methodstr = tag->getString("method", "file", 1);
Log::Engine* engine = ServerInstance->Modules.FindDataService<Log::Engine>("log/" + methodstr);
if (!engine)
{
if (!requiremethods)
continue; // We will open this later.
throw CoreException(methodstr + " is not a valid logging method at " + tag->source.str());
}
const Level level = tag->getEnum("level", Level::NORMAL, {
{ "error", Level::ERROR },
{ "warning", Level::WARNING },
{ "normal", Level::NORMAL },
{ "debug", Level::DEBUG },
{ "rawio", Level::RAWIO },
// Deprecated v3 names.
{ "sparse", Level::ERROR },
{ "verbose", Level::WARNING },
{ "default", Level::NORMAL },
});
TokenList types = tag->getString("type", "*", 1);
MethodPtr method = engine->Create(tag);
loggers.emplace_back(level, std::move(types), method, true, engine);
}
if (requiremethods && caching)
{
// The server has finished starting up so we can write out any cached log messages.
for (const auto& logger : loggers)
{
if (!logger.method->AcceptsCachedMessages())
continue; // Does not support logging.
for (const auto& message : cache)
{
if (logger.level >= message.level && logger.types.Contains(message.type))
logger.method->OnLog(message.time, message.level, message.type, message.message);
}
}
cache.clear();
cache.shrink_to_fit();
caching = false;
}
}
void Log::Manager::RegisterServices()
{
ServiceProvider* coreloggers[] = { &filelog, &stderrlog, &stdoutlog };
ServerInstance->Modules.AddServices(coreloggers, sizeof(coreloggers)/sizeof(ServiceProvider*));
}
void Log::Manager::UnloadEngine(const Engine* engine)
{
logging = true; // Prevent writing to dying loggers.
size_t logger_count = loggers.size();
loggers.erase(std::remove_if(loggers.begin(), loggers.end(), [&engine](const Info& info) { return info.engine == engine; }), loggers.end());
logging = false;
Normal("LOG", "The %s log engine is unloading; removed %zu/%zu loggers.", engine->name.c_str(), logger_count - loggers.size(), logger_count);
}
void Log::Manager::Write(Level level, const std::string& type, const std::string& message)
{
if (logging)
return; // Avoid log loops.
logging = true;
time_t time = ServerInstance->Time();
for (const auto& logger : loggers)
{
if (logger.level >= level && logger.types.Contains(type))
logger.method->OnLog(time, level, type, message);
}
if (caching)
cache.emplace_back(time, level, type, message);
logging = false;
}
void Log::Manager::Write(Level level, const std::string& type, const char* format, va_list& args)
{
Write(level, type, InspIRCd::Format(args, format));
}
