401 lines
12 KiB
JavaScript
401 lines
12 KiB
JavaScript
'use strict';
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// ==================================================================================
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// index.js
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// ----------------------------------------------------------------------------------
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// Description: System Information - library
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// for Node.js
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// Copyright: (c) 2014 - 2016
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// Author: Sebastian Hildebrandt
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// ----------------------------------------------------------------------------------
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// License: MIT
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// ==================================================================================
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// 10. Processes
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// ----------------------------------------------------------------------------------
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const os = require('os');
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const exec = require('child_process').exec;
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const fs = require('fs');
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const util = require('./util');
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let _platform = os.type();
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const _linux = (_platform == 'Linux');
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const _darwin = (_platform == 'Darwin');
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const _windows = (_platform == 'Windows_NT');
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const NOT_SUPPORTED = 'not supported';
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let _process_cpu = {
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all: 0,
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list: {},
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ms: 0
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};
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// --------------------------
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// PS - services
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// pass a comma separated string with services to check (mysql, apache, postgresql, ...)
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// this function gives an array back, if the services are running.
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function services(srv, callback) {
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// fallback - if only callback is given
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if (util.isFunction(srv) && !callback) {
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callback = srv;
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srv = '';
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}
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return new Promise((resolve, reject) => {
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process.nextTick(() => {
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if (_windows) {
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let error = new Error(NOT_SUPPORTED);
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if (callback) { callback(NOT_SUPPORTED) }
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reject(error);
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}
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srv = srv.trim().replace(/,+/g, " ").replace(/ +/g, " ").replace(/ +/g, "|");
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let srvs = srv.split('|');
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let comm = (_darwin) ? "ps -caxm -o pcpu,pmem,comm" : "ps axo pcpu,pmem,comm";
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let data = [];
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if (srv != '' && srvs.length > 0) {
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exec(comm + " | grep -v grep | egrep '" + srv + "'", function (error, stdout) {
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if (!error) {
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let lines = stdout.toString().replace(/ +/g, " ").replace(/,+/g, ".").split('\n');
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srvs.forEach(function (srv) {
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let ps = lines.filter(function (e) {
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return e.indexOf(srv) != -1
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});
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data.push({
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'name': srv,
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'running': ps.length > 0,
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'pcpu': parseFloat((ps.reduce(function (pv, cv) {
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return pv + parseFloat(cv.trim().split(' ')[0]);
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}, 0)).toFixed(2)),
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'pmem': parseFloat((ps.reduce(function (pv, cv) {
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return pv + parseFloat(cv.trim().split(' ')[1]);
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}, 0)).toFixed(2))
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})
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});
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if (callback) { callback(data) }
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resolve(data);
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} else {
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srvs.forEach(function (srv) {
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data.push({
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'name': srv,
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'running': false,
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'pcpu': 0,
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'pmem': 0
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})
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});
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if (callback) { callback(data) }
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resolve(data);
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}
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});
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} else {
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if (callback) { callback(data) }
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resolve(data);
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}
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});
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});
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}
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exports.services = services;
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// --------------------------
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// running processes
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function processes(callback) {
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let parsedhead = [];
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function parseHead(head, rights) {
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let space = (rights > 0);
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let count = 1;
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let from = 0;
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let to = 0;
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let result = [];
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for (let i = 0; i < head.length; i++) {
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if (count <= rights) {
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if (head[i] == ' ' && !space) {
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to = i - 1;
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result.push({
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from: from,
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to: to + 1,
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cap: head.substring(from, to + 1)
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});
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from = to + 2;
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count++;
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}
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space = head[i] == ' ';
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} else {
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if (head[i] != ' ' && space) {
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to = i - 1;
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if (from < to) {
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result.push({
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from: from,
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to: to,
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cap: head.substring(from, to)
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});
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}
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from = to + 1;
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count++;
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}
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space = head[i] == ' ';
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}
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}
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to = 1000;
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result.push({
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from: from,
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to: to,
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cap: head.substring(from, to)
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});
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return result;
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}
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function parseLine(line) {
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let pid = parseInt(line.substring(parsedhead[0].from, parsedhead[0].to));
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let pcpu = parseFloat(line.substring(parsedhead[1].from, parsedhead[1].to).replace(/,/g, "."));
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let pmem = parseFloat(line.substring(parsedhead[2].from, parsedhead[2].to).replace(/,/g, "."));
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let priority = parseInt(line.substring(parsedhead[3].from, parsedhead[3].to));
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let vsz = parseInt(line.substring(parsedhead[4].from, parsedhead[4].to));
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let rss = parseInt(line.substring(parsedhead[5].from, parsedhead[5].to));
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let started = line.substring(parsedhead[6].from, parsedhead[6].to).trim();
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let state = line.substring(parsedhead[7].from, parsedhead[7].to).trim();
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state = (state[0] == 'R' ? 'running' : (state[0] == 'S' ? 'sleeping' : (state[0] == 'T' ? 'stopped' : (state[0] == 'W' ? 'paging' : (state[0] == 'X' ? 'dead' : (state[0] == 'Z' ? 'zombie' : ((state[0] == 'D' || state[0] == 'U') ? 'blocked' : 'unknown')))))));
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let tty = line.substring(parsedhead[8].from, parsedhead[8].to).trim();
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if (tty == '?' || tty == '??') tty = '';
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let user = line.substring(parsedhead[9].from, parsedhead[9].to).trim();
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let command = line.substring(parsedhead[10].from, parsedhead[10].to).trim().replace(/\[/g, "").replace(/]/g, "");
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return ({
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pid: pid,
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pcpu: pcpu,
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pmem: pmem,
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priority: priority,
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mem_vsz: vsz,
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mem_rss: rss,
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started: started,
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state: state,
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tty: tty,
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user: user,
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command: command
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})
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}
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function parseProcesses(lines) {
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let result = [];
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if (lines.length > 1) {
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let head = lines[0];
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parsedhead = parseHead(head, 7);
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lines.shift();
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lines.forEach(function (line) {
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if (line.trim() != '') {
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result.push(parseLine(line));
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}
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});
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}
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return result;
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}
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function parseProcStat(line) {
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let parts = line.replace(/ +/g, " ").split(' ');
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let user = (parts.length >= 2 ? parseInt(parts[1]) : 0);
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let nice = (parts.length >= 3 ? parseInt(parts[2]) : 0);
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let system = (parts.length >= 4 ? parseInt(parts[3]) : 0);
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let idle = (parts.length >= 5 ? parseInt(parts[4]) : 0);
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let iowait = (parts.length >= 6 ? parseInt(parts[5]) : 0);
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let irq = (parts.length >= 7 ? parseInt(parts[6]) : 0);
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let softirq = (parts.length >= 8 ? parseInt(parts[7]) : 0);
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let steal = (parts.length >= 9 ? parseInt(parts[8]) : 0);
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let guest = (parts.length >= 10 ? parseInt(parts[9]) : 0);
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let guest_nice = (parts.length >= 11 ? parseInt(parts[10]) : 0);
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return user + nice + system + idle + iowait + irq + softirq + steal + guest + guest_nice;
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}
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function parseProcPidStat(line, all) {
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let parts = line.replace(/ +/g, " ").split(' ');
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if (parts.length >= 17) {
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let pid = parseInt(parts[0]);
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let utime = parseInt(parts[13]);
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let stime = parseInt(parts[14]);
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let cutime = parseInt(parts[15]);
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let cstime = parseInt(parts[16]);
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// calc
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let pcpuu = 0;
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let pcpus = 0;
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if (_process_cpu.all > 0 && _process_cpu.list[pid]) {
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pcpuu = (utime + cutime - _process_cpu.list[pid].utime - _process_cpu.list[pid].cutime) / (all - _process_cpu.all) * 100; // user
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pcpus = (stime + cstime - _process_cpu.list[pid].stime - _process_cpu.list[pid].cstime) / (all - _process_cpu.all) * 100; // system
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} else {
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pcpuu = (utime + cutime) / (all) * 100; // user
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pcpus = (stime + cstime) / (all) * 100; // system
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}
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return {
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pid: pid,
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utime: utime,
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stime: stime,
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cutime: cutime,
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cstime: cstime,
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pcpuu: pcpuu,
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pcpus: pcpus
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}
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} else {
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return {
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pid: 0,
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utime: 0,
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stime: 0,
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cutime: 0,
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cstime: 0,
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pcpuu: 0,
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pcpus: 0
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}
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}
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}
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return new Promise((resolve, reject) => {
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process.nextTick(() => {
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if (_windows) {
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let error = new Error(NOT_SUPPORTED);
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if (callback) { callback(NOT_SUPPORTED) }
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reject(error);
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}
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let result = {
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all: 0,
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running: 0,
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blocked: 0,
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sleeping: 0,
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list: []
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};
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let cmd = "";
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if (_linux) cmd = "ps axo pid:10,pcpu:6,pmem:6,pri:5,vsz:10,rss:10,start:20,state:20,tty:20,user:20,command";
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if (_darwin) cmd = "ps acxo pid,pcpu,pmem,pri,vsz,rss,start,state,tty,user,command -r";
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exec(cmd, function (error, stdout) {
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if (!error) {
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result.list = parseProcesses(stdout.toString().split('\n'));
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result.all = result.list.length;
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result.running = result.list.filter(function (e) {
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return e.state == 'running'
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}).length;
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result.blocked = result.list.filter(function (e) {
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return e.state == 'blocked'
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}).length;
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result.sleeping = result.list.filter(function (e) {
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return e.state == 'sleeping'
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}).length;
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if (_linux) {
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// calc process_cpu - ps is not accurate in linux!
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cmd = "cat /proc/stat | grep 'cpu '";
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for (let i = 0; i < result.list.length; i++) {
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cmd += (';cat /proc/' + result.list[i].pid + '/stat')
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}
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exec(cmd, function (error, stdout) {
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let curr_processes = stdout.toString().split('\n');
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// first line (all - /proc/stat)
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let all = parseProcStat(curr_processes.shift());
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// process
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let list_new = {};
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let resultProcess = {};
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for (let i = 0; i < curr_processes.length; i++) {
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resultProcess = parseProcPidStat(curr_processes[i], all);
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if (resultProcess.pid) {
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// store pcpu in outer array
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let listPos = result.list.map(function (e) { return e.pid; }).indexOf(resultProcess.pid);
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if (listPos >= 0) {
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result.list[listPos].pcpu = resultProcess.pcpuu + resultProcess.pcpus
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}
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// save new values
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list_new[resultProcess.pid] = {
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pcpuu: resultProcess.pcpuu,
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pcpus: resultProcess.pcpus,
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utime: resultProcess.utime,
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stime: resultProcess.stime,
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cutime: resultProcess.cutime,
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cstime: resultProcess.cstime
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}
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}
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}
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// store old values
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_process_cpu.all = all;
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_process_cpu.list = list_new;
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_process_cpu.ms = Date.now() - _process_cpu.ms;
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if (callback) { callback(result) }
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resolve(result);
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})
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} else {
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if (callback) { callback(result) }
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resolve(result);
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}
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}
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});
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});
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});
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}
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exports.processes = processes;
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// --------------------------
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// PS - process load
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// get detailed information about a certain process
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// (PID, CPU-Usage %, Mem-Usage %)
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function processLoad(proc, callback) {
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// fallback - if only callback is given
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if (util.isFunction(proc) && !callback) {
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callback = proc;
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proc = '';
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}
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return new Promise((resolve, reject) => {
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process.nextTick(() => {
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if (_windows) {
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let error = new Error(NOT_SUPPORTED);
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if (callback) { callback(NOT_SUPPORTED) }
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reject(error);
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}
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let result = {
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'proc': proc,
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'pid': -1,
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'cpu': 0,
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'mem': 0
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};
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if (proc) {
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exec("ps aux | grep " + proc + " | grep -v grep", function (error, stdout) {
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if (!error) {
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let data = stdout.replace(/ +/g, " ").split(' ');
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if (data.length > 2) {
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result = {
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'proc': proc,
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'pid': data[1],
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'cpu': parseFloat(data[2].replace(',', '.')),
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'mem': parseFloat(data[3].replace(',', '.'))
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}
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}
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}
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if (callback) { callback(result) }
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resolve(result);
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});
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} else {
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if (callback) { callback(result) }
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resolve(result);
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}
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});
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});
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}
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exports.processLoad = processLoad;
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