# systeminformation

Simple system and OS information library for [node.js][nodejs-url]

  [![NPM Version][npm-image]][npm-url]
  [![NPM Downloads][downloads-image]][downloads-url]
  [![Git Issues][issues-img]][issues-url]
  [![deps status][daviddm-img]][daviddm-url]
  [![MIT license][license-img]][license-url]

## Quick Start

### Installation

```bash
$ npm install systeminformation --save
```

### Usage

All functions (except `version` and `time`) are implemented as asynchronous functions. Here a small example how to use them:

```
var si = require('systeminformation');

// callback style
si.cpu(function(data) {
	console.log('CPU-Information:');
	console.log(data);
})

// promises style - new in version 3
si.cpu()
	.then(data => console.log(data))
	.catch(error => console.error(error));

```

### Major (breaking) Changes - Version 3

- works only with [node.js][nodejs-url] **v4.0.0** and above (using now internal ES6 promise function, arrow functions, ...)
- **Promises**. As you can see above, you can now also use it in a promise oriented way. But callbacks are still supported.
- `cpuCurrentspeed`: now returns an object with current minimal, maximal and average CPU frequencies of all cores.
- `mem`: now supports also newer versions of `free` (Version 3.3.10 and above); extended information `avaliable` (potentially available memory)
- `fsStats`: added information sum bytes read + write (tx) and sum transfer rate/sec (tx_sec) 
- `networkInterfaces`: now providing one more detail: internal - true if this is an internal interface like "lo"
- `networkConnections`: instead of only counting sockets, you now get an array of objects with connection details for each socket (protocol, local and peer address, state)
- `users`: now provides an array of objects with users online including detailed session information (login date/time, ip address, terminal, command) 
- `inetLatency`: now you can provide a host against which you want to test latency (default is 8.8.8.8)
- `getDynamicData`: changed order of parameters (callback - if provided - is now the last one): `getDynamicData(srv, network, callback)`
- `getAllData`: changed order of parameters (callback - if provided - is now the last one): `getAllData(srv, network, callback)`

New Functions

- `disksIO`: returns overall diskIO and IOPS values for all mounted volumes

Bug Fixes

- several bug fixes (like assess errors in `cpuCurrentspeed`, potentially incorrect results in `users`, ...)
- testet on even more platforms and linux distributions

**Be aware**, that the new version 3.x is **NOT fully backward compatible** to version 2.x ...


### Major (breaking) Changes - Version 2

There had been a lot of changes in version 2 of systeminformation! Here is a quick overview (for those who come from version 1):

New Functions

- `version`: returns systeminformation version (semver) of this library
- `system`: hardware info (manufacturer, product/model name, version, serial, uuid)
- `networkConnections`: number of active connections
- `inetLatency`: latency in ms to external resource (internet)
- `getStaticData`: returns on json object with static data at once (OS, CPU, Network Interfaces - they should not change until restarted)
- `getDynamicData`: returns on json object with all dynamic data at once (e.g. for monitoring agents)
- `getAllData`: returns on json object with all data (static and dynamic) at once

Renamed Functions (now all camelCase)

- `osinfo`: renamed to `osInfo`
- `cpu_currentspeed`: renamed to `cpuCurrentspeed`
- `cpu_temperature`: renamed to `cpuTemperature`
- `fs_size`: renamed to `fsSize`
- `fs_speed`: renamed to `fsStats`
- `network_interfaces`: renamed to `networkInterfaces`
- `network_speed`: renamed to `networkStats`
- `network_connections`: renamed to `networkConnections`
- `currentload`: renamed to `currentLoad`
- `fullload`: renamed to `fullLoad`
- `processload`: renamed to `processLoad`
- `checksite`: renamed to `inetChecksite`

Function Changes

- `cpu_temperature`/`cpuTemperature`: -1 is new default (and indicates that non sensors are installed)
- `cpu_temperature`/`cpuTemperature`: new result `max` which returns max temperature of all cores
- `cpu_currentspeed`/`cpuCurrentspeed`: now in GHz
- `cpu`: splitted `manufacturer` (e.g. Intel) and `brand` (e.g. Core 2 Duo)
- `network_speed`/`networkStats`: now better support for OS X (also support for `operstate`)
- `network_speed`/`networkStats`: overall received and transferred bytes (rx, tx)
- `mem`: now better support for OS X (also support for `swaptotal`, `swapused`, `swapfree`)
- `fs_size`/`fsSize`: use-values now in % (0 - 100% instead of 0 - 1)
- `fs_speed`/`fsStats`: now also full support for OS X
- `checksite`/`inetChecksite`: new result structure - see command reference
- `checksite`/`inetChecksite`: ms (former `response_ms`): -1 if not ok

Other changes

- no more external dependencies: `request` is not longer needed
- where possible results are now integer or float values (instead of strings) because it is easier to calculate with numbers ;-)

## Core concept

[Node.js][nodejs-url] comes with some basic OS information, but I always wanted a little more. So I came up to write this
little library. This library is still work in progress. Version 3 comes with further improvements. First it
requires now node.js version 4.0 and above. Another big change is, that all functions now return promises. You can use them
like before with callbacks OR with promises (see example in this documentation). I am sure, there is for sure room for improvement.
I was only able to test it on several Debian, Raspbian, Ubuntu distributions as well as OS X (Mavericks, Yosemite, El Captain).
Since version 2 nearly all functionality is available on OS X/Darwin platforms. But be careful, this library will definitely NOT work on Windows platforms!

If you have comments, suggestions & reports, please feel free to contact me!

## Reference

### Sections

This library is splitted in several sections:

1. General
2. System (HW)
3. Operating System
4. CPU
5. Memory
6. File System
7. Network
8. Processes
9. Users
10. Internet
11. GetAll

### Function Reference and OS Support

| function        | Linux           | OS X  | Comments |
| -------------- | ------ | ------ | ------- |
| si.version() | X | X | systeminformation version (no callback!) |
| si.time() | X | X | time information (no callback!) |
| - current | X | X | local time |
| - uptime | X | X | uptime |
| si.system(cb) | X | X | hardware information |
| - manufacturer | X | X | e.g. 'MSI' |
| - model | X | X | model/product e.g. 'MS-7823' |
| - version | X | X | version e.g. '1.0' |
| - serial | X | X | serial number |
| - uuid | X | X | UUID |
| si.osInfo(cb) | X | X | OS information |
| - platform   | X | X | 'Linux' or 'Darwin' |
| - distro | X | X |  |
| - release | X | X |  |
| - codename | | X |  |
| - kernel | X | X | kernel release - same as os.release() |
| - arch | X | X | same as os.arch() |
| - hostname | X | X | same as os.hostname() |
| - logofile | X | X | e.g. 'apple', 'debian', 'fedora', ... |
| si.cpu(cb) | X | X | CPU information|
| - manufacturer | X | X | e.g. 'Intel(R)' |
| - brand | X | X | e.g. 'Core(TM)2 Duo' |
| - speed | X | X | in GHz e.g. '3.40' |
| - cores | X | X | # cores |
| si.cpuCurrentspeed(cb) | X | X | current CPU speed (in GHz)|
| - avg | X | X | avg CPU speed (all cores) |
| - min | X | X | min CPU speed (all cores) |
| - max | X | X | max CPU speed (all cores) |
| si.cpuTemperature(cb) | X | | CPU temperature (if sensors is installed) |
| - main | X | | main temperature |
| - cores | X | | array of temperatures |
| - max | X | | max temperature |
| si.mem(cb) | X | X | Memory information|
| - total | X | X | total memory |
| - free | X | X | not used |
| - used | X | X | used (incl. buffers/cache) |
| - active | X | X | used actively (excl. buffers/cache)  |
| - buffcache | X | X | used by buffers+cache |
| - available | X | X | potentially available (total - active) |
| - swaptotal | X | X |  |
| - swapused | X | X |  |
| - swapfree | X | X |  |
| si.fsSize(cb) | X | X | returns array of mounted file systems |
| - [0].fs | X | X | name of file system |
| - [0].size | X | X | sizes in Bytes |
| - [0].used | X | X | used in Bytes |
| - [0].use | X | X | used in % |
| - [0].mount | X | X | mount point |
| si.fsStats(cb) | X | X | current transfer stats |
| - rx | X | X | bytes read since startup |
| - wx | X | X | bytes written since startup |
| - tx | X | X | total bytes read + written since startup |
| - rx_sec | X | X | bytes read / second (* see notes) |
| - wx_sec | X | X | bytes written / second (* see notes) |
| - tx_sec | X | X | total bytes reads + written / second  |
| - ms | X | X | interval length (for per second values) |
| si.disksIO(cb) | X | X | current transfer stats |
| - rIO | X | X | read IOs on all mounted drives |
| - wIO | X | X | write IOs on all mounted drives |
| - tIO | X | X | write IOs on all mounted drives |
| - rIO_sec | X | X | read IO per sec (* see notes) |
| - wIO_sec | X | X | write IO per sec (* see notes) |
| - tIO_sec | X | X | total IO per sec (* see notes) |
| - ms | X | X | interval length (for per second values) |
| si.networkInterfaces(cb) | X | X | array of network interfaces |
| - [0].iface | X | X | interface name |
| - [0].ip4 | X | X | ip4 address |
| - [0].ip6 | X | X | ip6 address |
| - [0].internal | X | X | true if internal interface |
| si.networkStats(iface,cb) | X | X | current network stats of given interface<br>iface parameter is optional<br>defaults to first external network interface|
| - iface | X | X | interface |
| - operstate | X | X | up / down |
| - rx | X | X | received bytes overall |
| - tx | X | X | transferred bytes overall|
| - rx_sec | X | X | received bytes / second (* see notes) |
| - tx_sec | X | X | transferred bytes per second (* see notes) |
| - ms | X | X | interval length (for per second values) |
| si.networkConnections(cb) | X | X | current network network connections<br>returns an array of all connections|
| - [0].protocol | X | X | tcp or udp |
| - [0].localaddress | X | X | local address |
| - [0].localport | X | X | local port |
| - [0].peeraddress | X | X | peer address |
| - [0].peerport | X | X | peer port |
| - [0].state | X | X | like ESTABLISHED, TIME_WAIT, ... |
| si.currentLoad(cb) | X | X | CPU-Load |
| - avgload | X | X | average load  |
| - currentload | X | X | CPU-Load in % |
| si.fullLoad(cb) | X | X | CPU-full load since bootup in % |
| si.services('mysql, apache2', cb) | X | X | pass comma separated string of services |
| - [0].name | X | X | name of service |
| - [0].running | X | X | true / false |
| - [0].pcpu | X | X | process % CPU |
| - [0].pmem | X | X | process % MEM |
| si.processes(cb) | X | X | # running processes |
| - all | X | X | # of all processes |
| - running | X | X | # of all processes running |
| - blocked | X | X | # of all processes blocked |
| si.processLoad('apache2',cb) | X | X | detailed information about given process |
| - proc | X | X | process name |
| - pid | X | X | PID |
| - cpu | X | X | process % CPU |
| - mem | X | X | process % MEM |
| si.users(cb) | X | X | array of users online |
| - [0].user | X | X | user name |
| - [0].tty | X | X | terminal |
| - [0].date | X | X | login date |
| - [0].time | X | X | login time |
| - [0].ip | X | X | ip address (remote login) |
| - [0].command | X | X | last command or shell |
| si.inetChecksite(url, cb) | X | X | response-time (ms) to fetch given URL |
| - url | X | X | given url |
| - ok | X | X | status code OK (2xx, 3xx) |
| - status | X | X | status code |
| - ms | X | X | response time in ms |
| si.inetLatency(host, cb) | X | X | response-time (ms) to external resource<br>host parameter is optional (default 8.8.8.8)|
| si.getStaticData(cb)  | X | X | all static data at once |
| si.getDynamicData(srv,iface,cb) | X | X | all dynamic data at once |
| si.getAllData(srv,iface,cb) | X | X | all data at once |

### cb: Asynchronous Function Calls (callback)

Remember: all functions (except `version` and `time`) are implemented as asynchronous functions! There are now two ways to consume them:

**Callback Style**

```
var si = require('systeminformation');

si.networkStats('eth1', function(data) {
	console.log('Network Interface Stats (eth1):');
	console.log('- is up: ' + data.operstate);
	console.log('- RX bytes overall: ' + data.rx);
	console.log('- TX bytes overall: ' + data.tx);
	console.log('- RX bytes/sec: ' + data.rx_sec);
	console.log('- TX bytes/sec: ' + data.tx_sec);
})
```

### Promises

**Promises Style** is new in version 3.0. 

When omitting callback parameter (cb), then you can use all function in a promise oriented way. All functions (exept of `version` and `time`) are returning a promis, that you can consume:

```
si.networkStats('eth1')
	.then(data => {
		console.log('Network Interface Stats (eth1):');
		console.log('- is up: ' + data.operstate);
		console.log('- RX bytes overall: ' + data.rx);
		console.log('- TX bytes overall: ' + data.tx);
		console.log('- RX bytes/sec: ' + data.rx_sec);
		console.log('- TX bytes/sec: ' + data.tx_sec);
	})
	.catch(error => console.error(error));

```

### *: Additional Notes

In `fsStats`, `disksIO` and `networkStats` the results per second values (rx_sec, IOPS, ...) are calculated beginning
with the second call of the function. It is determined by calculating the difference of transferred bytes / IOs
divided by the time between two calls of the function.

## Known Issues

There is one major things, that I was still not able to solve:

For OS X, I did not find a reliable way to get the CPU temperature. All suggestions I found did not work on current version of OS X on different machines (intel platform). So if anyone has an idea, this would be helpful.

I am happy to discuss any comments and suggestions. Please feel free to contact me if you see any possibility of improvement!

## Version history

| Version        | Date           | Comment  |
| -------------- | -------------- | -------- |
| 3.0.1          | 2016-08-17     | Bug-Fix disksIO, users, updated docs |
| 3.0.0          | 2016-08-03     | new major version 3.0 |
| 2.0.5          | 2016-03-02     | changed .gitignore |
| 2.0.4          | 2016-02-22     | tiny correction - removed double quotes CPU brand, ... |
| 2.0.3          | 2016-02-22     | optimized cpuCurrentspeed |
| 2.0.2          | 2016-02-22     | added CoreOS identification |
| 2.0.1          | 2016-01-07     | minor patch |
| 2.0.0          | 2016-01-07     | new major version 2.0 |
| 1.0.7          | 2015-11-27     | fixed: si.network_speed() |
| 1.0.6          | 2015-09-17     | fixed: si.users() |
| 1.0.5          | 2015-09-14     | updated dependencies |
| 1.0.4          | 2015-07-18     | updated docs |
| 1.0.3          | 2015-07-18     | bugfix cpu cores |
| 1.0.2          | 2015-07-18     | bugfix cpu_currentspeed, cpu_temperature |
| 1.0.1          | 2015-07-18     | documentation update |
| 1.0.0          | 2015-07-18     | bug-fixes, version bump, published as npm component |
| 0.0.3          | 2014-04-14     | bug-fix (cpu_speed) |
| 0.0.2          | 2014-03-14     | Optimization FS-Speed & CPU current speed |
| 0.0.1          | 2014-03-13     | initial release |

## Comments

If you have ideas or comments, please do not hesitate to contact me.


Happy monitoring!

Sincerely,

Sebastian Hildebrandt, [+innovations](http://www.plus-innovations.com)

## Credits

Written by Sebastian Hildebrandt [sebhildebrandt](https://github.com/sebhildebrandt)

#### Contributers

- Guillaume Legrain [glegrain](https://github.com/glegrain)
- Riccardo Novaglia [richy24](https://github.com/richy24)
- Quentin Busuttil [Buzut](https://github.com/Buzut)
- lapsio [lapsio](https://github.com/lapsio)

## Copyright Information

Linux is a registered trademark of Linus Torvalds, OS X is a registered trademark of Apple Inc.,
Windows is a registered trademark of Microsoft Corporation. Node.js is a trademark of Joyent Inc.,
Intel is a trademark of Intel Corporation, Raspberry Pi is a trademark of the Raspberry Pi Foundation,
Debian is a trademark of the Debian Project, Ubuntu is a trademark of Canonical Ltd.
All other trademarks are the property of their respective owners.

## License [![MIT license][license-img]][license-url]

>The [`MIT`][license-url] License (MIT)
>
>Copyright &copy; 2014-2016 Sebastian Hildebrandt, [+innovations](http://www.plus-innovations.com).
>
>Permission is hereby granted, free of charge, to any person obtaining a copy
>of this software and associated documentation files (the "Software"), to deal
>in the Software without restriction, including without limitation the rights
>to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
>copies of the Software, and to permit persons to whom the Software is
>furnished to do so, subject to the following conditions:
>
>The above copyright notice and this permission notice shall be included in
>all copies or substantial portions of the Software.
>
>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
>IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
>FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
>AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
>LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
>OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
>THE SOFTWARE.
>
>Further details see [LICENSE](LICENSE) file.


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[npm-url]: https://npmjs.org/package/systeminformation
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[downloads-url]: https://npmjs.org/package/systeminformation

[license-url]: https://github.com/sebhildebrandt/systeminformation/blob/master/LICENSE
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[daviddm-url]: https://david-dm.org/sebhildebrandt/systeminformation

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[issues-url]: https://github.com/sebhildebrandt/systeminformation/issues