Function InitLogging

src/init.cpp:904–961

* Initialize global loggers. * * Note that this is called very early in the process lifetime, so you should be * careful about what global state you rely on here. */

 * careful about what global state you rely on here.
 */
bool InitLogging()
{
    LogInstance().m_print_to_file = SysCfg().GetBoolArg("-logprinttofile", false);
    LogInstance().m_file_path = AbsPathForConfigVal(SysCfg().GetArg("-debuglogfile", DEFAULT_DEBUGLOGFILE));
    LogInstance().m_print_to_console = SysCfg().GetBoolArg("-logprinttoconsole", true);
    LogInstance().m_print_file_line  = SysCfg().GetBoolArg("-logprintfileline", false);
    LogInstance().m_log_timestamps = SysCfg().GetBoolArg("-logtimestamps", DEFAULT_LOGTIMESTAMPS);
    LogInstance().m_log_time_micros = SysCfg().GetBoolArg("-logtimemicros", DEFAULT_LOGTIMEMICROS);
    LogInstance().m_log_threadnames = SysCfg().GetBoolArg("-logthreadnames", DEFAULT_LOGTHREADNAMES);
    LogInstance().m_totoal_written_size = LogInstance().GetCurrentLogSize();
    LogInstance().m_max_log_size = SysCfg().GetArg("-debuglogfilesize", 500 * 1024 * 1024);
    fLogIPs = SysCfg().GetBoolArg("-logips", DEFAULT_LOGIPS);

    // TODO: ...
    // nLogMaxSize = GetArg("-logmaxsize", 100) * 1024 * 1024;

    // m_mapMultiArgs["-debug"].push_back("error");  // Enable ERROR logger by default

    // ********************************************************* initialize logging
    if (SysCfg().IsArgCount("-debug")) {
        // Special-case: if -debug=0/-nodebug is set, turn off debugging messages
        const std::vector<std::string> categories = SysCfg().GetMultiArgs("-debug");

        if (std::none_of(categories.begin(), categories.end(),
            [](std::string cat) { return cat == "0" || cat == "none"; })) {
            for (const auto& cat : categories) {
                if (!LogInstance().EnableCategory(cat)) {
                    fprintf(stdout, "Unsupported logging category -debug=%s.\n", cat.c_str());
                }
            }
        }
    }


    if (!LogInstance().StartLogging()) {
        fprintf(stdout, "Start logging error! log_file=%s",
                        LogInstance().m_file_path.string().c_str());
        return false;
    }

    std::string version_string = FormatFullVersion();
#ifdef VER_DEBUG
    version_string += " (debug build)";
#else
    version_string += " (release build)";
#endif
    LogPrint(BCLog::INFO, PACKAGE_NAME " version %s\n", version_string);

    // LogInstance().DisableCategory("INFO");
    // LogInstance().EnableCategory("NET");
    // if (GetBoolArg("-shrinkdebugfile", !fDebug))
    //     ShrinkDebugFile();

     if (!LogInstance().m_log_timestamps)
        LogPrint(BCLog::INFO, "Startup time: %s\n", FormatISO8601DateTime(GetTime()));

    return true;
}