Function write_log

plugin/server_audit/server_audit.cc:1105–1158

*/

static int write_log(const char *message, size_t len, time_t ts)
{
#if defined _WIN32 || !defined SUX_LOCK_GENERIC
  DBUG_ASSERT(lock_operations.is_locked_or_waiting());
#endif
  int result= 0;

  if (output_type == OUTPUT_FILE)
  {
    if (logfile)
    {
      MYSQL_TIME ltime;
      thd_gmt_sec_to_TIME(NULL, &ltime, ts);

      size_t ts_len= 0;
      char *ts_start= (char *) message - TIMESTAMP_OUTPUT_LENGTH;

      /*
        Format the timestamp into the start of the gap. We use
        TIMESTAMP_OUTPUT_LENGTH - 1 as the limit to ensure there is always at
        least one byte available at the end of the gap for the trailing comma,
        even if the formatted timestamp takes up the maximum allowed space
        (including its null terminator).
      */
      thd_TIME_to_str(NULL, &ltime, timestamp_format_buffer,
                      ts_start, TIMESTAMP_OUTPUT_LENGTH - 1);
      ts_len= strlen(ts_start);

      /* Append a comma as the CSV field separator. */
      ts_start[ts_len++]= ',';
      ts_start[ts_len]= 0;

      if (ts_len > 0 && ts_len < TIMESTAMP_OUTPUT_LENGTH)
        memmove((char *) message - ts_len, ts_start, ts_len);

      char *final_message= (char *) message - ts_len;
      size_t final_len= len + ts_len;

      if (!(is_active= (logger_write(logfile, final_message, final_len) == (int) final_len)))
      {
        ++log_write_failures;
        result= 1;
      }
    }
  }
  else if (output_type == OUTPUT_SYSLOG)
  {
    syslog(syslog_facility_codes[syslog_facility] |
           syslog_priority_codes[syslog_priority],
           "%s %.*s", syslog_info, (int) len, message);
  }

  return result;
}

/**
  Write to the log, acquiring the lock.