Create a log file only if some data is written to it

[parikshit.nangre@…]

I am creating a log file using

src::severity_logger< severity_level > m_DbLogger; logging::add_file_log (

keywords::auto_flush = true, keywords::file_name = m_Settings.LogFileSQL + "_diagnostics.log", keywords::time_based_rotation = sinks::file::rotation_at_time_point(0, 0, 0), keywords::format = (

boost::log::expressions::stream << boost::log::expressions::format_date_time< boost::posix_time::ptime >("TimeStamp", "%Y-%m-%d %H:%M:%S") << ": [" << boost::log::expressions::attr< severity_level >("Severity") << "] " << boost::log::expressions::smessage

)

);

It creates a log file before any log goes into it. I want to have that log file ONLY IF some data is written into it. If no log goes into it we dont want to see that log file.

Please suggest a solution for it.

[Andrey Semashev]

The file is created when log records are passed to the sink. If that is not what happens in your case, please provide a minimal compilable code sample that reproduces the problem.