server.js

#!/usr/bin/env node

const readFile = require('fs').readFile

const basicEnvironment = require('nodeos-boot-singleUser')
const linuxCmdline = require('linux-cmdline')
const mountUsersFS = require('nodeos-boot-singleUserMount')
const rimraf = require('rimraf').sync
const startRepl = require('nodeos-mount-utils').startRepl

const prepareSessions = require('.')


const MOUNTPOINT = '/tmp'


/**
 * This error handler traces the error and starts a Node.js REPL
 *
 * @param {Error} error The error that gets traced
 */
function onerror(error)
{
 console.trace(error)
 startRepl('NodeOS-boot-multiuser')
}


basicEnvironment(function(error)
{
 if(error) return onerror(error)

 // Get Linux kernel command line arguments
 readFile('/proc/cmdline', 'utf8', function(error, data)
 {
 if(error) return onerror(error)

 var cmdline = linuxCmdline(data)

 // Mount users filesystem
 mountUsersFS(MOUNTPOINT, cmdline, function(error)
 {
 if(error) return onerror(error)

 prepareSessions(MOUNTPOINT, cmdline.single, function(error)
 {
 if(error) return onerror(error)

 // Remove from initramfs the files only needed on boot to free memory
 try
 {
 rimraf('/bin/nodeos-boot-multiuser')
 rimraf('/init')
 rimraf('/lib/node_modules/nodeos-boot-multiuser')
 rimraf('/sbin')
 }
 catch(error)
 {
 // If `rootfs` is read-only (like in `vagga`), ignore the error
 if(error.code !== 'EROFS') return callback(error)
 }

 // KTHXBYE >^.^<
 })
 })
 })
})