iAklis

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

iAklis

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

iAklis

#!/bin/bash

old_memcg_num=$(cat /proc/cgroups | awk '/memory/ {print $3}')

free -m
slabtop -o | head
echo "now the number of memory cgroup is                $old_memcg_num"
echo "begin to create cgroups"

prefix=/sys/fs/cgroup/memory/aklis

iAklis

#!/usr/bin/python
bpf_text = """
#include <linux/ptrace.h>
#include <linux/sched.h>        /* For TASK_COMM_LEN */
#include <linux/icmp.h>
#include <linux/netdevice.h>
struct probe_icmp_data_t
{
        u64 timestamp_ns;
        u32 tgid;

iAklis

#      ___             ___ __      __
#     /   | __  ______/ (_) /_____/ /
#    / /| |/ / / / __  / / __/ __  / 
#   / ___ / /_/ / /_/ / / /_/ /_/ /  
#  /_/  |_\__,_/\__,_/_/\__/\__,_/   
#                                    
# Linux Audit Daemon - Best Practice Configuration 
# /etc/audit/audit.rules
#
# Compiled by Florian Roth

iAklis

.
├── matree
├── swift
│   ├── 00503_0_254.242_2013mar02
│   ├── 00546_0_ensbdasa-09aug2013
│   ├── 00553_0_ensbdpix3-09aug2013
│   ├── 00554_0_ensbdpix4-09aug2013
│   ├── 00555_0_ensbdrtr1-2013aug09
│   ├── 00557_0_ENSBDVPN1-02AUG2013
│   ├── 00558_0_ENSBDVPN2-02AUG2013

iAklis

from Crypto.Util.number import *
from Crypto.Cipher import AES
import requests
import time
import base64


def xor(a, b):
    return "".join([chr(ord(a[i]) ^ ord(b[i % len(b)])) for i in xrange(len(a))])

iAklis

How many times shouldn't it happen...

-- https://news.ycombinator.com/item?id=11396045

SELECT count(*)
FROM (SELECT id, repo_name, path
        FROM [bigquery-public-data:github_repos.sample_files]
 ) AS F

iAklis

function (urandom) {

    function step1(){
        var a = new Date();
        var b = Number(a.getFullYear());
        t = 0;
        for (var i = 0; i < b.length;	i++ ){
            t += parseInt();
        }
        var c = String(a.getFullYear());

iAklis

<?php
 
//TODO: connect to DB 
 
$id = $_GET['id'];
 
//TODO: sqli filter
 
$secretId = 1024;
if($id == $secretId){