alex-bender

CFLAGS=-Wall -g

clean: ## Clean directory
	rm -f *.o

help: ## Help target
	@ag '^[a-zA-Z_-]+:.*?## .*$$' --nofilename $(MAKEFILE_LIST) \
	| sort \
	| awk 'BEGIN{FS=": ## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'

alex-bender

Why do compilers even bother with exploiting undefinedness signed overflow? And what are those
mysterious cases where it helps?

A lot of people (myself included) are against transforms that aggressively exploit undefined behavior, but
I think it's useful to know what compiler writers are accomplishing by this.

TL;DR: C doesn't work very well if int!=register width, but (for backwards compat) int is 32-bit on all
major 64-bit targets, and this causes quite hairy problems for code generation and optimization in some
fairly common cases. The signed overflow UB exploitation is an attempt to work around this.

alex-bender

# aptitude install qemu-kvm libvirt-bin
# create a bridge with your current interface

auto eth1
iface eth1 inet manual
 
auto br0
iface br0 inet dhcp
	bridge_ports eth1

alex-bender

#!/bin/bash

server='hastebin.com';

usage="$0 pastes into $server
  usage: $0 something
  example: '$0 pie' or 'ps aufx |$0'"

if [ -z $1 ]; then 
  str=`cat /dev/stdin`;

alex-bender

#!/usr/bin/python

import urllib2
import os
import json

URL = 'http://hastebin.com/documents'

def run(*args):
    if args:

alex-bender

#!/bin/bash
#
# Shell scripts for get image manifest from v2 registry
#
# Tested on Debian 8, curl 7.38.0, jq-1.5
#

set -e -u

# Default tag is latest

alex-bender

#Introduction to Devops Resources:

##Chapter 1

2015 State of DevOps Report https://puppet.com/resources/white-paper/2015-state-of-devops-report

Knight Capital https://en.wikipedia.org/wiki/Knight_Capital_Group

alex-bender

#!/usr/bin/env python3

import os
import sys

_b = sys.version_info[0] < 3 and (lambda x:x) or (lambda x:x.encode('utf-8'))

def ssh_exec_pass(password, args, capture_output=False):
    '''
        Wrapper around openssh that allows you to send a password to

alex-bender

#!/usr/bin/env python

"""Simple HTTP Server With Upload.

This module builds on BaseHTTPServer by implementing the standard GET
and HEAD requests in a fairly straightforward manner.

"""

alex-bender

Colours in terminal

It's a common confusion about terminal colours... Actually we have this:

• plain ascii
• ansi escape codes (16 colour codes with bold/italic and background)
• 256 colour palette (216 colours + 16 ansi + 24 gray) (colors are 24bit)
• 24bit true colour ("888" colours (aka 16 milion))

printf "\x1b[${bg};2;${red};${green};${blue}m\n"