Root Privilegs for NSTask in Swift - xcode

Question

I searched a lot on the web to find a simple way to get root privileges in my NSTask but I only found old articles which are written in Objective-C. But my Xcode Project is written in Swift :x is there a way to solve this problem to run a NSTask with Root Privilegs? :) I know I have to use something like AppleScript, STPrivilegedTask or the BetterAuthorizationSample from Apple but all I've found is written in Objective-C...
My Idea is to create a application that makes a storage media bootable with the command createinstallmedia :p all works perfectly the only problem is that the command wants root privileges, for testing I simply open my Terminal and login as Root but this is not the greatest solution for this Problem :D so please help me! :o
My Code the only thing that miss is the code to get root access:
import Cocoa
class ViewController: NSViewController {
var Task = NSTask()
var openPanel = NSOpenPanel()
var workingpath_createinstallmedia : String!
var workingpath_medium : String!
var workingpath_application : String!
var volume_flag = "--volume"
var applicationpath_flag = "--applicationpath"
var nointeraction_flag = "--nointeraction"
var commandpath : String!
var postcommand : [String]!
var DirectoryOS : NSURL!
var DirectoryMedium : NSURL!
#IBOutlet weak var PathControlOS: NSPathControl!
#IBOutlet weak var PathControlMedium: NSPathControl!
#IBOutlet weak var Outputlabel: NSTextField!
#IBAction func OSauswählen(sender: AnyObject) {
openPanel.canChooseDirectories = false
openPanel.canChooseFiles = true
openPanel.canCreateDirectories = false
openPanel.allowsMultipleSelection = false
if openPanel.runModal() == NSModalResponseOK {
DirectoryOS = openPanel.URLs[0] as NSURL
PathControlOS.objectValue = DirectoryOS
}
}
#IBAction func Mediumauswählen(sender: AnyObject) {
openPanel.canChooseDirectories = true
openPanel.canChooseFiles = false
openPanel.canCreateDirectories = false
openPanel.allowsMultipleSelection = false
if openPanel.runModal() == NSModalResponseOK {
DirectoryMedium = openPanel.URLs[0] as NSURL
PathControlMedium.objectValue = DirectoryMedium
}
}
#IBAction func starttask(sender: AnyObject) {
// edit Strings
// Createinstallmedia
workingpath_createinstallmedia = String(DirectoryOS)
workingpath_createinstallmedia = workingpath_createinstallmedia.stringByReplacingOccurrencesOfString("file://", withString: "")
workingpath_application = workingpath_createinstallmedia.stringByReplacingOccurrencesOfString("%20", withString: " ")
workingpath_createinstallmedia = workingpath_application + "/Contents/Resources/createinstallmedia"
// Medium
workingpath_medium = String(DirectoryMedium)
workingpath_medium = workingpath_medium.stringByReplacingOccurrencesOfString("file://", withString: "")
workingpath_medium = workingpath_medium.stringByReplacingOccurrencesOfString("%20", withString: " ")
// config Task Parameters
commandpath = workingpath_createinstallmedia
postcommand = [volume_flag,workingpath_medium,applicationpath_flag,workingpath_application,nointeraction_flag]
// commit the Parameters to the Task
Task.launchPath = commandpath
Task.arguments = postcommand
// start Task
Task.launch()
Task.waitUntilExit()
}
}
Thanks for your help!!!

Answer 1

I solved using sudo into the command and asking to the user for the password to give directly to the sudo, in the following way:
echo "passwordhere" | sudo -S command --arguments
and doing this using the sh shell executable to run the process, using this method i successfully created an app to create bootable mac os install media called TINU, but you need to be careful while dealing with user password, i chose to make my app open source to let others know what it does with this kinds of tasks that needs user password, but on mac os you should create specialized programs that does this kind of privileged tasks and then start them using system apis that will manage authentication for you and let the specialized program to do his job.