Journalctl

This is a module for accessing the all mighty Systemd Journal and its handy dandy key-value store hidden behind every log line. In the background it spawns a journalctl process with the output format ``json` and parses the serialised object stream.

API

Require the module and create a new instance:

`js
const Journalctl = require('@seydx/journalctl');
const journalctl = new Journalctl([opts]);
`

The optional object `opts` can have the following properties:
* `identifier`: Just output logs of the given syslog identifier (or identifier if defined as array) (cf. man journalctl, option '-t')
* `unit`: Just output logs originated from the given unit file (or files if defined as array) (cf. man journalctl, option '-u')
* `filter`: An array/string of matches to filter by (cf. man journalctl, matches)

`js
const Journalctl = require('journalctl');

let opts = {
identifier: ['systemd', 'homebridge'],
unit: ['homebridge-instances-platform', 'homebridge'],
filter: ['Stopped Node.js HomeKit Server', 'Started Node.js HomeKit Server']
}

const journalctl = new Journalctl(opts);

journalctl.on('event', (event) => {

console.log(event)

});
`

$3

`js
journalctl.on('event', (event) => {});
`

Is fired on every log event and hands over the object `event` describing the event. (Oh boy ... so many events in one sentence ...)

$3

`js
journalctl.stop([callback]);
`

Stops journalctl and calls the optional `callback`` once everything has been killed.

Contributing

This project is forked from @jue89. Only a few improvements have been added so that the module can work with my Homebridge plugin (homebridge-instances-platform)