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Mini Shell
Mini Shell
'use strict'
const os = require('os')
const bin = require('./bin')
const history = require('./history')
function parseDate (datestr) {
const year = datestr.substring(0, 4)
const month = datestr.substring(4, 6)
const day = datestr.substring(6, 8)
const hour = datestr.substring(8, 10)
const minutes = datestr.substring(10, 12)
const seconds = datestr.substring(12, 14)
const useconds = datestr.substring(15, 21)
const sign = datestr.substring(21, 22)
const tmz = parseInt(datestr.substring(22, 25), 10)
const tmzh = Math.floor(tmz / 60)
const tmzm = tmz % 60
return new Date(
year + '-' + month + '-' + day + 'T' + hour +
':' + minutes + ':' + seconds +
'.' + useconds +
sign + (tmzh > 9 ? tmzh : '0' + tmzh) + '' + (tmzm > 9 ? tmzm : '0' + tmzm)
)
}
/**
* Get pid informations through wmic command.
* @param {Number[]} pids
* @param {Object} options
* @param {Function} done(err, stat)
*/
function wmic (pids, options, done) {
let whereClause = 'ProcessId=' + pids[0]
for (let i = 1; i < pids.length; i++) {
whereClause += ' or ' + 'ProcessId=' + pids[i]
}
const args = [
'PROCESS',
'where',
'"' + whereClause + '"',
'get',
'CreationDate,KernelModeTime,ParentProcessId,ProcessId,UserModeTime,WorkingSetSize'
]
bin('wmic', args, { windowsHide: true, windowsVerbatimArguments: true }, function (err, stdout, code) {
if (err) {
if (err.message.indexOf('No Instance(s) Available.') !== -1) {
const error = new Error('No matching pid found')
error.code = 'ENOENT'
return done(error)
}
return done(err)
}
if (code !== 0) {
return done(new Error('pidusage wmic command exited with code ' + code))
}
const date = Date.now()
// Note: On Windows the returned value includes fractions of a second.
// Use Math.floor() to get whole seconds.
// Fallback on current date when uptime is not allowed (see https://github.com/soyuka/pidusage/pull/130)
const uptime = Math.floor(os.uptime() || (date / 1000))
// Example of stdout on Windows 10
// CreationDate: is in the format yyyymmddHHMMSS.mmmmmmsUUU
// KernelModeTime: is in units of 100 ns
// UserModeTime: is in units of 100 ns
// WorkingSetSize: is in bytes
//
// Refs: https://superuser.com/a/937401/470946
// Refs: https://msdn.microsoft.com/en-us/library/aa394372(v=vs.85).aspx
// NB: The columns are returned in lexicographical order
//
// CreationDate KernelModeTime ParentProcessId ProcessId UserModeTime WorkingSetSize
// 20150329221650.080654+060 153750000 0 777 8556250000 110821376
stdout = stdout.split(os.EOL)
let again = false
const statistics = {}
for (let i = 1; i < stdout.length; i++) {
const line = stdout[i].trim().split(/\s+/)
if (!line || line.length !== 6) {
continue
}
const creation = parseDate(line[0])
const ppid = parseInt(line[2], 10)
const pid = parseInt(line[3], 10)
const kerneltime = Math.round(parseInt(line[1], 10) / 10000)
const usertime = Math.round(parseInt(line[4], 10) / 10000)
const memory = parseInt(line[5], 10)
let hst = history.get(pid, options.maxage)
if (hst === undefined) {
again = true
hst = { ctime: kerneltime + usertime, uptime: uptime }
}
// process usage since last call
const total = (kerneltime + usertime - hst.ctime) / 1000
// time elapsed between calls in seconds
const seconds = uptime - hst.uptime
const cpu = seconds > 0 ? (total / seconds) * 100 : 0
history.set(pid, { ctime: usertime + kerneltime, uptime: uptime }, options.maxage)
statistics[pid] = {
cpu: cpu,
memory: memory,
ppid: ppid,
pid: pid,
ctime: usertime + kerneltime,
elapsed: date - creation.getTime(),
timestamp: date
}
}
if (again) {
return wmic(pids, options, function (err, stats) {
if (err) return done(err)
done(null, Object.assign(statistics, stats))
})
}
done(null, statistics)
})
}
module.exports = wmic
Zerion Mini Shell 1.0