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QEMU Cortex-m3 with semihosting

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Convenient DeDRM Scripts
-------------------------

**NOTE**: read https://blog.quaintous.com/2021/02/16/remove-drm-from-ebooks/ to find out what this gist is good for.

* ./init.sh:	extracts Adobe Digital Editions private key and required files to DeDRM.
* ./dedrm:	removes DRM from given ebook (pdf/epub)

If you are using this for the first time, make sure that you have authenticated your Adobe Digital Editions (ADE) and run './init.sh'. Import any DRM-protected file into ADE and run 'dedrm.sh':

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#include "ConfigFormat.h"
#include <string.h>

const struct ConfigFormatField *ConfigFormatGetFieldByName(const struct ConfigFormat *Format, const char *Name, void *Structure)
{
	static struct ConfigFormatField Field;

	for (size_t n = 0; n < Format->num_members; n++) {
		if (strcmp(Name, Format->names[n]) != 0) {
			continue;

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project(stlink C)
cmake_minimum_required(VERSION 3.1)
set (CMAKE_C_STANDARD 99)

include(CheckCCompilerFlag)
find_package(PkgConfig)

set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH};${CMAKE_SOURCE_DIR}/cmake/modules")

file(DOWNLOAD

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#include <WiFi.h>
#include <SPIFFS.h>
#include <ESPAsyncWebServer.h>
#include <WebSocketsServer.h>

// Constants
const char *ssid = "ESP32-AP";
const char *password =  "LetMeInPlz";
const char *msg_toggle_led = "toggleLED";
const char *msg_get_led = "getLEDState";

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ZFS Snapshots and PostgreSQL

I recently set up a host running Ubuntu 14.04 LTS, ubuntu-zfs, and PostgreSQL 9.3. Using the ZFS snapshot feature I was able to make a snapshot of the file system holding the PostgreSQL database, write the snapshot to a compressed file, transfer it to another Ubuntu 14.04 LTS host running ubuntu-zfs, restore it, and launch PostgreSQL using that data directory with all the data (seemingly) intact.

The database is very low-traffic, so I do not know how effective this strategy would be for a busier database.

I take no responsibility if you attempt this setup and it causes data loss or other issues. Use it at your own risk; this document is meant to explain a potential setup and open discussion about limitations and potential improvements.

First Host Setup

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Download ejs.min.js from https://cdn.jsdelivr.net/npm/ejs@3.1.6/ejs.min.js
See also https://cpp.hotexamples.com/examples/-/QJSEngine/toScriptValue/cpp-qjsengine-toscriptvalue-method-examples.html

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/*
 * robot.js
 *
 * You'll need three keys in order to unlock the
 * Algorithm: the red key, the green key, and the
 * blue key. Unfortunately, all three of them are
 * behind human-proof barriers.
 *
 * The plan is simple: reprogram the maintenance
 * robots to grab the key and bring it through

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/*************
 * ambush.js *
 *************
 *
 * Oh. Oh, I see. This wasn't quite part of the plan.
 *
 * Looks like they won't let you take the Algorithm
 * without a fight. You'll need to carefully weave your
 * way through the guard drones.
 *

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/**********************
 * fordingTheRiver.js *
 **********************
 *
 * And there's the river. Fortunately, I was prepared for this.
 * See the raft on the other side?
 *
 * Everything is going according to plan.
 */