Swift: How to get Console User, UID, and GID via SCDynamicStoreCopyConsoleUser? - objective-c

Question

I am able to get the Username, UID and GID from SCDynamicStoreCopyConsoleUser using python:
#!/usr/bin/python
from SystemConfiguration import SCDynamicStoreCopyConsoleUser
cfuser = SCDynamicStoreCopyConsoleUser( None, None, None )
print cfuser[0] # Returns console user, e.g.: myUsername
print cfuser[1] # Returns console user’s UID, e.g.: 501
print cfuser[2] # Returns console user’s GID, e.g.: 20
How can I get this same return using Swift?
Swift Declaration of SCDynamicStoreCopyConsoleUser
func SCDynamicStoreCopyConsoleUser(_ store: SCDynamicStore!,
_ uid: CMutablePointer<uid_t>,
_ gid: CMutablePointer<gid_t>) -> Unmanaged<CFString>!
My Swift Call
var uid: CMutablePointer<uid_t>!
var gid: CMutablePointer<gid_t>!
var cfuser: NSArray = [SCDynamicStoreCopyConsoleUser(nil,uid,gid)]
// the return has only one element containing the username

Answer 1

The Swift function SCDynamicStoreCopyConsoleUser takes a CMutablePointer<uid_t> argument which means that you have to pass the address of a uid_t variable.
Also you should check if the call succeeded (otherwise nil is returned),
and you
have to convert the returned unmanaged object as described in
Working with Cocoa Data Types:
import SystemConfiguration
var uid: uid_t = 0
var gid: gid_t = 0
if let theResult = SCDynamicStoreCopyConsoleUser(nil, &uid, &gid) {
let name = theResult.takeUnretainedValue()
println("name = \(name), uid = \(uid), gid = \(gid)")
} else {
println("failed")
}