macshome’s gists

macshome / EnvironmentVariables.swift

Created May 2, 2024 12:48

A playground to see different ways to get environment variables in Swift

	import Foundation

	// A playground to see different ways to get environment variables in Swift

	// Foundation is the easiest way using the awesome ProcessInfo class.

	// Get all of the environment variables for your running process in a Dictionary.
	let foundationEnv = ProcessInfo().environment

	print("******** ProcessInfo Environment ********")

macshome / MobileGestalt.swift

Created April 24, 2024 17:44

Get crazy and hook MobileGestalt in a Swift Playground!

	// Get crazy and hook MobileGestalt in a Swift Playground!
	//
	// If you are a LONG time Mac developer you know that the Gestalt system
	// used to be a way to get info about your Mac. These days it's a private
	// thing that Apple locks away and you shouldn't really touch. Most of the info
	// that you need can probaby be found in IOKit, but some values, like
	// the provisioningUDID are not avaliable any other way.
	//
	// That said, it's a fun exersize to see how to do some various things in Swift.
	// Things like loading a dylib or calling private C functions.

macshome / IOKit.swift

Last active April 29, 2024 14:42

This playground shows you a few different ways to get device info via IOKit.

	// This playground shows you a few different ways to get device info via IOKit.
	// If you want to explore IOKit and look for interesting data I would download
	// the Additional Developer Tools from Apple and use the IORegistryExplorer app.
	// It makes it super easy to poke around in the IOKit planes.

	import IOKit
	import Foundation

	// For convient access we can make a computed getter for the PlatformExpert.
	// Traditionally this has been where you go to find all sorts of data about the

macshome / TimeInterval+Calendar.swift

Last active February 29, 2024 17:06

A simple extension to TimeInterval that allows you to just use the standard units of time rather than all that 60 * 60 jazz with APIs that use TimeInterval.

	import Foundation

	extension TimeInterval {
	var seconds: TimeInterval { self }
	var minutes: TimeInterval { self * 60 }
	var hours: TimeInterval { self * 3_600 }
	var days: TimeInterval { self * 86_400 }
	var weeks: TimeInterval { self * 604_800 }
	var months: TimeInterval { self * 2_628_000 }

macshome / Activity.swift

Created February 15, 2024 18:49 — forked from zwaldowski/Activity.swift

os_activity_t for Swift 3

	//
	// Activity.swift
	//
	// Created by Zachary Waldowski on 8/21/16.
	// Copyright © 2016 Zachary Waldowski. Licensed under MIT.
	//

	import os.activity

	private final class LegacyActivityContext {

macshome / IsScreenLocked.swift

Created October 30, 2023 19:05

Paste into a Swift playground on macOS to see if your screen is locked

	import Cocoa
	import PlaygroundSupport

	PlaygroundPage.current.needsIndefiniteExecution = true

	var isScreenLocked: Bool {
	guard let wssProperties = CGSessionCopyCurrentDictionary() as? [String : Any], (wssProperties["CGSSessionScreenIsLocked"] != nil) else {
	return false
	}
	return true

macshome / Sessions.swift

Created October 30, 2023 18:55

Paste into a macOS Swift Playground to explore SecuritySession and CGSession attributes.

	import Cocoa

	// Security Session
	//
	// You can access bits about the security session to get some basic info. You can only get info about your own session.
	// Other than the session id, the values are all Bools.
	var sessionID = SecuritySessionId()
	var sessionAttrs = SessionAttributeBits()

	let result = SessionGetInfo(callerSecuritySession,

macshome / MetadataSearching.swift

Last active October 30, 2023 18:43

Paste into a Swift playground to find all the executable binaries and shell scripts on your system with blinding speed.

	import Foundation
	import PlaygroundSupport

	PlaygroundPage.current.needsIndefiniteExecution = true

	// Simple class to search for things with `NSMetadataQuery`.
	class Searcher {
	// This is just for timing things
	let startTime = Date()

macshome / DiskSpace.swift

Created October 30, 2023 17:47

Paste into a Playground to see the different ways to calculate free disk space on macOS.

	import Cocoa
	import CoreServices

	// Different ways of finding out about disk space on macOS.

	// This method from CoreServices lets you find the space the OS considers "purgable"
	// You can trigger a purge as well with `CSDiskSpaceStartRecovery`
	let path = URL(fileURLWithPath: "/")
	let possibleBytes = CSDiskSpaceGetRecoveryEstimate(path as NSURL)

macshome / MemoryLayout.swift

Created April 3, 2023 19:20

Swift playground for exploring memory layout

	import Foundation

	// Playground for exploring memory layout in Swift.

	// A simple struct
	struct Foo {
	let a: Int?
	let b: Int?
	var isTrue = true
	}

Josh Wisenbaker macshome