code: function logm() {
      var args = [].slice.call(arguments);
      var level = args.shift();
      if (logFor(level)) {
        var msg = args.shift();
        args.unshift(posix.getpid());
        args.unshift(level);
        args.unshift("[%s] m(%d): " + msg);
        logv(args);
      }
    }
docs: logm('info', "my message %s", v);