signature MLTON_SYSLOG =
   sig
      type openflag
         
      val CONS     : openflag
      val NDELAY   : openflag
      val NOWAIT   : openflag
      val ODELAY   : openflag
      val PERROR   : openflag
      val PID      : openflag

      type facility

      val AUTHPRIV : facility
      val CRON     : facility
      val DAEMON   : facility
      val KERN     : facility
      val LOCAL0   : facility
      val LOCAL1   : facility
      val LOCAL2   : facility
      val LOCAL3   : facility
      val LOCAL4   : facility
      val LOCAL5   : facility
      val LOCAL6   : facility
      val LOCAL7   : facility
      val LPR      : facility
      val MAIL     : facility
      val NEWS     : facility
      val SYSLOG   : facility
      val USER     : facility
      val UUCP     : facility

      type loglevel

      val EMERG    : loglevel
      val ALERT    : loglevel
      val CRIT     : loglevel
      val ERR      : loglevel
      val WARNING  : loglevel
      val NOTICE   : loglevel
      val INFO     : loglevel
      val DEBUG    : loglevel

      val closelog: unit -> unit
      val log: loglevel * string -> unit
      val openlog: string * openflag list * facility -> unit
   end

MLton.Syslog is a complete interface to the system logging facilities. See man 3 syslog for more details.

• closelog ()
  closes the connection to the system logger.

• log (l, s)
  logs message s at a loglevel l.

• openlog (name, flags, facility)
  opens a connection to the system logger. name will be prefixed to each message, and is typically set to the program name.