nightsparc nightsparc

Scenario:

multiple USB devices plugged via hub to a host (Linux OS based),
multiple services/programs interacting with TTY running on top (e.g. GPSd)

Problem:

At boot TTY are randomly assigned to devices causing depending services/programs instabilities. They could indeed fail to start because of different TTY configurations.

Solution:

C++ : Polymorphic inheritance without vtable

Inheritance and Virtual Table are often used to create interface in C++ polymorphic class
What if ... there were another way to do this ?
easier, cleaner, faster and more reliable
This article explains how to use CRTP, [std::variant](https://en.cppreference.com/w/cpp/utility/variant and std::visit to increase code performance.

Table of content

Introduction

Renew GPG key

Given that your key has expired.

$ gpg --list-keys
$ gpg --edit-key KEYID

Use the expire command to set a new expire date:

	# @brief Helper to read key value pairs
	# @details
	# Read kv in the form <key>=<value>
	# The script cleans whitespaces first and will remove any newlines
	# @see https://stackoverflow.com/a/27918723/1267320
	read_kvp()
	{
	file="$1"
	while IFS="=" read -r key value; do
	# clean whitespaces

	Originall From: Posted 2015-05-29 http://ubwg.net/b/full-list-of-ffmpeg-flags-and-options

	This is the complete list that’s outputted by ffmpeg when running ffmpeg -h full.

	usage: ffmpeg [options] [[infile options] -i infile]… {[outfile options] outfile}…

	Getting help:
	-h — print basic options
	-h long — print more options
	-h full — print all options (including all format and codec specific options, very long)

	$ zfs destroy -nv system/usr/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]
	would destroy system/usr/jails/[email protected]

	#include <X11/Xlib.h>
	#include <stdio.h>
	#include <stdlib.h>

	int main()
	{
	Display *display;
	Window window;
	XEvent event;
	int s;

	#!/bin/sh

	MODEM="$(mmcli -L \| grep -o '/org/freedesktop/ModemManager1/Modem/[0-9]*' \| head -1)"
	BEARER="$(mmcli -m $MODEM --list-bearers \| grep -o '/org/freedesktop/ModemManager1/Bearer/[0-9]*' \| head -1)"

	mkdir -p /run/systemd/network
	connect() {
	MODEM="$(mmcli -L \| grep -o '/org/freedesktop/ModemManager1/Modem/[0-9]*' \| head -1)"

	# hardcode all the things !! (this is for mobile vikings)

	See https://www.pragmaticlinux.com/2020/10/start-a-virtualbox-vm-on-boot-with-systemd/