Fredrik Persson fpersson

README

The example below creates a TCP server listening on a stream (i.e. SOCK_STREAM) socket. A similar approach can be followed to create a UDP server on a datagram (i.e. SOCK_DGRAM) socket. See man systemd.socket for details.

An example server

Create an simple echo server at /opt/foo/serve.py.

README

This is an example of a socket-activated per-connection service (which is usually referred to as inetd-like service). A thorough explanation can be found at http://0pointer.de/blog/projects/inetd.html.

Define a socket unit

The key point here is to specify Accept=yes, which will make the socket accept connections (behaving like inetd) and pass only the resulting connection socket to the service handler.

git archive --format=tar.gz -o /tmp/my-repo.tar.gz --prefix=my-repo/ master

More detailed version: https://til.simonwillison.net/git/git-archive

Using VAAPI's hardware accelerated video encoding on Linux with Intel's hardware on FFmpeg and libav

Hello, brethren :-)

As it turns out, the current version of FFmpeg (version 3.1 released earlier today) and libav (master branch) supports full H.264 and HEVC encode in VAAPI on supported hardware that works reliably well to be termed "production-ready".

Sphinx with Markdown walkthrough for HTML and PDF output

This walkthrough installs Sphinx and configures it to output HTML and PDF from .md. If you install it on a VM, allocate over 25GB storage and multiple processors. You'll need Ubuntu 16.04 LTS, an internet connection, and sudo rights.

	#!/bin/bash
	#Desc: Ett mindre fint bashscript för att skapa en mpeg-film av ett gäng bilder
	# med morphad övergång mellan bilderna. Scriptet kräver ffmpeg och ImageMagick.
	#Version: 1.1
	#Coder: Fredrik Persson
	#E-mail: [email protected]
	#Download/webpage:
	#Licens: BSD
	#TODO: Exif-rotation?

	public class DefaultHashMap<K, V> extends HashMap<K, V> {

	private final Class<V> cls;

	public DefaultHashMap(Class factory) {
	this.cls = factory;
	}

	@Override
	public V get(Object key) {

	"""
	A file lock implementation that tries to avoid platform specific
	issues. It is inspired by a whole bunch of different implementations
	listed below.

	- https://bitbucket.org/jaraco/yg.lockfile/src/6c448dcbf6e5/yg/lockfile/__init__.py
	- http://svn.zope.org/zc.lockfile/trunk/src/zc/lockfile/__init__.py?rev=121133&view=markup
	- http://stackoverflow.com/questions/489861/locking-a-file-in-python
	- http://www.evanfosmark.com/2009/01/cross-platform-file-locking-support-in-python/
	- http://packages.python.org/lockfile/lockfile.html

	/*
	* A simple example of json string parsing with json-c.
	*
	* clang -Wall -g -I/usr/include/json-c/ -o json_parser json_parser.c -ljson-c
	*/
	#include <json.h>
	#include <stdio.h>

	int main() {
	struct json_object *jobj;

	#include <getopt.h>
	#include <iostream>

	int num = -1;
	bool is_beep = false;
	float sigma = 2.034;
	std::string write_file = "default_file.txt";

	void PrintHelp()
	{