Parse linux / Unix "top" command to json format

Parse unix top command raw output to JSON format using node.js without external dependencies. On Windows PC you can use WSL (windows subsystem for linux).

Test

Just run:

//navigate to module folder and run
npm run start
or
node example.js

Install

//require node > v.12.0.0
npm install topparser

Usage

var topparser=require("topparser")

    //start topparser
    topparser.start()

    //then data is available
    topparser.on("data",data=>{
        console.log(JSON.stringify(data,0,2))
    })

    //if some error happens
    topparser.on("error",error=>{
        console.log(error)
    })

    //if topparser exit
    topparser.on("close",code=>{
        console.log(code)
    })

    //kill topparser after 10 seconds, for example
    setTimeout(()=>{
        topparser.stop()
    },10000)

Options

var options={
              pid_limit:10,//limit number of included pids in list (default: unlimited)
              pid_filter:(proc)=>{return proc.user=="root"?proc:null},// filtering the pid list (for example: include only pid with user == root) (default: null)
              pid_sort:(a,b)=>{return a.cpu-b.cpu},// sorting pid list by cpu usage (default)
            }


    //start topparser, with options (optional): pid_limit, pid_sort, pid_filter
    topparser.start(options)
    ....

Result JSON output:

{
  "top": {
    "time": "01:50:41",
    "up_hours": "2:21",
    "users": "0",
    "load_average": [
      "0.52",
      "0.58",
      "0.59"
    ]
  },
  "tasks": {
    "total": "17",
    "running": "1",
    "sleeping": "16",
    "stopped": "0",
    "zombie": "0"
  },
  "cpu": {
    "us": "17.5",
    "sy": "4.7",
    "ni": "0.0",
    "id": "77.5",
    "wa": "0.0",
    "hi": "0.4",
    "si": "0.0",
    "st": "0.0"
  },
  "mem": {
    "total": "33411872",
    "used": "16217872",
    "free": "16964648",
    "buff_cache": "229352"
  },
  "swap": {
    "used": "186300",
    "avail_mem": "17060268"
  },
  "processes": [
    [
      {
        "pid": "1",
        "user": "root",
        "pr": "20",
        "ni": "0",
        "virt": "8892",
        "res": "312",
        "shr": "272",
        "s": "S",
        "cpu": "0.0",
        "mem": "0.0",
        "time": "0:00.07",
        "command": "init"
      },
      {
        "pid": "8",
        "user": "root",
        "pr": "20",
        "ni": "0",
        "virt": "8908",
        "res": "232",
        "shr": "180",
        "s": "S",
        "cpu": "0.0",
        "mem": "0.0",
        "time": "0:00.01",
        "command": "init"
      }
    ]
  ]
}