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serial-number/index.js /
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| 'use strict'; | |
| var fs = require('fs'); | |
| var http = require('http'); | |
| var exec = require('child_process').exec; | |
| var serialNumber = function (cb, cmdPrefix) { | |
| var delimiter = ': '; | |
| var uselessSerials = [ | |
| 'To be filled by O.E.M.', | |
| ] | |
| var fromCache = function (error, stdout) { | |
| fs.readFile(__dirname + '/cache', function (fsErr, data) { | |
| if (data) {data = data.toString().trim();} | |
| if (fsErr || !data || data.length < 2) { | |
| attemptEC2(function() { | |
| stdoutHandler(error, stdout, true); | |
| }); | |
| } else { | |
| cb(null, data); | |
| } | |
| }); | |
| }; | |
| var stdoutHandler = function (error, stdout, bypassCache) { | |
| if (error && !bypassCache) { | |
| fromCache(error, stdout); | |
| } else { | |
| cb(error, parseResult(stdout)); | |
| } | |
| }; | |
| var parseResult = function (input) { | |
| var result = input.slice(input.indexOf(delimiter) + 2).trim(); | |
| var isResultUseless = uselessSerials.some(function(val) { | |
| return val === result; | |
| }); | |
| if (isResultUseless) { | |
| return ''; | |
| } | |
| return result; | |
| }; | |
| var attemptEC2 = function (failCb) { | |
| var data = ''; | |
| var failHandler = function () { | |
| failCb(); | |
| failCb = function () {}; | |
| }; | |
| var request = http.get( | |
| 'http://169.254.169.254/latest/meta-data/instance-id', | |
| function (res) { | |
| res.on('data', function (chunk) { | |
| data += chunk; | |
| }).on('end', function () { | |
| if (data.length > 2) { | |
| cb(null, data.trim()); | |
| } else { | |
| failHandler(); | |
| } | |
| }); | |
| } | |
| ); | |
| request.on('error', failHandler).setTimeout(1000, failHandler); | |
| }; | |
| cmdPrefix = cmdPrefix || ''; | |
| var vals = ['Serial', 'UUID']; | |
| var cmd; | |
| switch (process.platform) { | |
| case 'win32': | |
| delimiter = '\r\n'; | |
| vals[0] = 'IdentifyingNumber'; | |
| cmd = 'wmic csproduct get '; | |
| break; | |
| case 'darwin': | |
| cmd = 'system_profiler SPHardwareDataType | grep '; | |
| break; | |
| case 'linux': | |
| if (process.arch === 'arm') { | |
| vals[1] = 'Serial'; | |
| cmd = 'cat /proc/cpuinfo | grep '; | |
| } else { | |
| cmd = 'dmidecode -t system | grep '; | |
| } | |
| break; | |
| case 'freebsd': | |
| cmd = 'dmidecode -t system | grep '; | |
| break; | |
| } | |
| if (!cmd) return cb(new Error('Cannot provide serial number for ' + process.platform)); | |
| if (serialNumber.preferUUID) vals.reverse(); | |
| exec(cmdPrefix + cmd + vals[0], function (error, stdout) { | |
| if (error || parseResult(stdout).length > 1) { | |
| stdoutHandler(error, stdout); | |
| } else { | |
| exec(cmdPrefix + cmd + vals[1], stdoutHandler); | |
| } | |
| }); | |
| }; | |
| serialNumber.preferUUID = false; | |
| module.exports = exports = serialNumber; | |
| exports.useSudo = function (cb) { | |
| serialNumber(cb, 'sudo '); | |
| }; |