fix: severity in mask needs to be calculated

Author: csimi

lib/posix.js

@@ -1,25 +1,27 @@
 const { facility, severity, flag } = require('syslog-constants');
 
-const reduceValues = (props, values) => Object.entries(props).reduce((memo, [key, value]) => {
-	if (value && values[key]) {
-		return memo | values[key];
+const identity = (value) => value;
+const createMask = (value) => Math.pow(2, value);
+
+const reduceValues = (props, values, map) => Object.entries(props).reduce((memo, [key, value]) => {
+	if (value && Number.isInteger(values[key])) {
+		return memo | map(values[key]);
 	}
 
 	return memo;
 }, 0);
 
 module.exports = ({ log, open, close, setmask }) => ({
 	openlog (id, opt, fac) {
-		return open(id, reduceValues(opt, flag), Number.isInteger(fac) ? fac : facility[fac]);
+		return open(id, reduceValues(opt, flag, identity), Number.isInteger(fac) ? fac : facility[fac]);
 	},
 	closelog () {
 		return close();
 	},
 	setlogmask (mask) {
-		return setmask(reduceValues(mask, severity));
+		return setmask(reduceValues(mask, severity, createMask));
 	},
 	syslog (prio, message) {
 		return log(Number.isInteger(prio) ? prio : severity[prio], message);
 	},
 });
-