vishvananda

Introduction

A few weeks ago I was browsing Hacker News, and I noticed a post about a little online programming game called Colossal Cue Adventure. I was instantly hooked and three problems quickly fell to some hacked-together Python.

I was feeling pretty satisfied with myself until I noticed the little phrase at the bottom:

you can try your hand at the bonus level by typing bonus...

vishvananda

package main

import (
	"fmt"
	"math"
	"math/bits"
	"os"
	"sync"
	"time"
	"unsafe"

vishvananda

import time
import math
import sys
import struct

data = """* 8 1 7 8 8 5 2 9 5 9 5
8 5 1 1 5 6 9 4 4 5 2 1
7 2 3 5 2 9 2 6 9 3 9 4
9 2 5 9 8 9 5 7 7 5 9 6
2 4 6 7 1 4 2 6 6 2 5 8

vishvananda

package main

import (
	"fmt"
	"math"
	"os"
	"time"
)

const (

vishvananda

#!/bin/bash

if [ "$4" == "" ]; then
    echo "usage: $0 <local_ip> <remote_ip> <new_local_ip> <new_remote_ip>"
    echo "creates an ipsec tunnel between two machines"
    exit 1
fi

SRC="$1"; shift
DST="$1"; shift

vishvananda

diff --git a/nl/nl_linux.go b/nl/nl_linux.go
index ab76091..a49f675 100644
--- a/nl/nl_linux.go
+++ b/nl/nl_linux.go
@@ -27,7 +27,8 @@ const (
 	// tc rules or filters, or other more memory requiring data.
 	RECEIVE_BUFFER_SIZE = 65536
 	// Kernel netlink pid
-	PidKernel uint32 = 0
+	PidKernel     uint32 = 0

vishvananda

#!/usr/bin/env bash

if [ "$1" == "" ]; then
  echo "usage: $0 <docker_id>"
  echo "Exposes the netns of a docker container to the host"
  exit 1
fi
ppid=`docker inspect $1 | grep Pid | awk '{print $2 + 0}'`
if [ "$ppid" == "" ]; then
  echo "lxc parent pid not found"

vishvananda

#!/usr/bin/env bash

if [ "$1" == "" ]; then
  echo "Usage: $0 <deb-package>"
  exit 1
fi
TARGET=$1
TMPDIR=`mktemp -d`

dpkg-deb -x $TARGET $TMPDIR

vishvananda

#!/usr/bin/env bash
SSH_KEYFILE=`tempfile`
SSL_KEYFILE=`tempfile`
if ! curl -s -f http://169.254.169.254/latest/meta-data/public-keys/0/openssh-key > $SSH_KEYFILE; then
  echo  "Failed to get key"
fi
cat $SSH_KEYFILE
PASSWORD=`openssl rand -base64 48 | tr -d '/+' | cut -c1-16`
sudo usermod ubuntu -p `openssl passwd -1 $PASSWORD`

vishvananda

import os

with open('in.py') as infile:
    data = infile.read()

def encode(char, sym):
    return'+'.join([sym] * ord(char))

def write(outfile, wrap, boc, eoc, sep, sym='1'):
    text = sep.join([boc + encode(char, sym) + eoc for char in data])