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interface bcm2835gpio

# hexdump -s4 -n4 -e '\"0x\" 4/1 \"%02X\"\"\\n\"\" \"' /proc/device-tree/soc/ranges
bcm2835gpio_peripheral_base 0x20000000

# Transition delay calculation: SPEED_COEFF/khz - SPEED_OFFSET
# These depend on system clock, calibrated for stock 700MHz
# bcm2835gpio_speed SPEED_COEFF SPEED_OFFSET
bcm2835gpio_speed_coeffs 146203 36

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#!/usr/bin/env bash

COMMAND=$1

pushd `dirname $0` > /dev/null
DIR=`pwd -P`
popd > /dev/null

cd $DIR

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#!/usr/bin/env bash

DIR=`dirname $0`

echo 'nat on en0 from $localnet to any -> (en0)' > $DIR/share-vpn.rules
sudo pfctl -f $DIR/share-vpn.rules -e
echo "Use 'sudo pfctl -F all' to clear NAT rules"

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#-----------------------------------------
# NXP lpc1114fn23 Cortex-M0 32k flash, 4k ram

set CHIPNAME lpc1114
set CPUTAPID 0x0BB11477
set CPUROMSIZE 0x8000
set CPURAMSIZE 0x1000

# After reset the chip is clocked by the ~12MHz internal RC oscillator.
# When board-specific code (reset-init handler or device firmware)

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#!/bin/bash
# Create a complete OS .dmg file (it needs the Apple Developers Tools installed)
# usage:
#    pkg-create.sh <contents-root-folder> <package-name> <package-version> <vendor-string>
#

CONTENTS=$1
shift
NAME=$1
shift

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#!/usr/bin/env sh

/usr/bin/screen -S reverse-ssh-tunnel -d -m /usr/bin/autossh -M 65500  -o "ServerAliveInterval 20" -R 2222:localhost:22 server

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version: "3"
services:
  cron:
    image: alpine
    command: sh -c "echo '* * * * * task > /proc/1/fd/1 2> /proc/1/fd/2' | crontab - && crond -f"
    volumes:
      - ./task.sh:/usr/local/bin/task:ro

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Adventures in Python Core Dumping

After watching Bryan Cantrill's presentation on [Running Aground: Debugging Docker in Production][aground] I got all excited (and strangely nostalgic) about the possibility of core-dumping server-side Python apps whenever they go awry. This would theoretically allow me to fully inspect the state of the program at the point it exploded, rather than relying solely on the information of a stack trace.

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#!/usr/bin/env bash

sudo apt-get update && sudo apt-get install -y bc bison build-essential curl flex git gnupg gperf libesd0-dev liblz4-tool libncurses5-dev libsdl1.2-dev libwxgtk3.0-dev libxml2 libxml2-utils lzop maven openjdk-8-jdk pngcrush schedtool squashfs-tools xsltproc zip zlib1g-dev g++-multilib gcc-multilib lib32ncurses5-dev lib32readline-dev lib32z1-dev android-sdk

if `hash adb &>/dev/null`; then
  echo "Android tools found..."
else
  echo "Installing android tools..."
  echo "y" | android update sdk -u -a --filter tools
  echo "y" | android update sdk -u -a --filter platform-tools