akpoff / gen_data.sql

Created October 12, 2025 19:17

Using SQLite to Generate Uniformly-Distributed, Random Values

	-- gen_data.sql

	-- Test SQLite PRNG random value generator and analyze with dieharder
	-- https://webhome.phy.duke.edu/~rgb/General/dieharder.php

	-- Execute this file with `cat gen_data\| sqlite3 \| tr -d '\n' \| xxd -r -p > data.bin`
	-- It's easier to get SQLite to send the data to ASCII first line by line, then
	-- convert to binary for use with dieharder
	-- Analyze with `dieharder -g 201 -f data.bin -a`

akpoff / duffs_device.py

Created August 15, 2024 05:39

Duff's Device in Python

	def duffs_device(frm, count):
	"""
	Implement Duff's Device for copying frm in a loop-unrolled fashion.


	:param frm: List or array-like object to copy frm
	:param count: Number of elements to copy
	"""
	# Ensure we have at least one element to copy
	if count <= 0:

akpoff / expire_bruteforce.sh

Last active September 2, 2018 21:54

scan_logs_bruteforce - Add bad guys to brute force table

	#!/bin/sh

	# Add to crontab
	# @hourly sleep $((RANDOM \% 1800)) && expire_bruteforce.sh > /dev/null

	result=$(pfctl -t bruteforce -T expire 86400 2>&1)
	count=$(echo $result \| cut -d '/' -f 1)

	if [ ${count:-0} -gt 0 ] ; then
	echo $result

akpoff / vc-rcs.el

Created January 27, 2018 22:13

Support for OpenBSD's OpenRCS in Emacs VC

	;;; vc-rcs.el --- support for RCS version-control -- lexical-binding:t --

	;; Copyright (C) 1992-2017 Free Software Foundation, Inc.

	;; Author: FSF (see vc.el for full credits)
	;; Maintainer: Andre Spiegel <[email protected]>
	;; Package: vc

	;; This file is part of GNU Emacs.

akpoff / curl_imap_query_commands.md

Created January 2, 2018 17:29

curl commands to query imap servers

Based on https://busylog.net/telnet-imap-commands-note/

curl options

-k -- don't verify certificate (optional)
-n -- use .netrc for username and password (optional)
-X -- request to send to server

akpoff / dhcpd_to_unbound

Last active July 2, 2021 06:37

dhcpd_to_unbound -- add dhcpd entries as local_data to unbound

	#!/bin/sh

	#
	# Copyright (c) 2017, 2019 Aaron Poffenberger <[email protected]>
	#
	# Permission to use, copy, modify, and distribute this software for any
	# purpose with or without fee is hereby granted, provided that the above
	# copyright notice and this permission notice appear in all copies.
	#
	# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

akpoff / elm-lang-openbsd.md

Last active May 23, 2024 00:00

Building elm-lang on OpenBSD

Requirements

haskell-platform
elm-lang BuildFromSource.hs script

Overview - OpenBSD considerations

akpoff / replace_linux_with_openbsd

Last active January 3, 2018 15:39

Replace Linux with OpenBSD

	#!/bin/sh

	# For folks who will type `curl $URL \| bash` without considering the consequences.
	# A quick way to install OpenBSD

	# BTW, I haven't tested this

	echo "apt-get install curl && curl -L http://ftp.openbsd.org/pub/OpenBSD/6.2/`uname -m`/install62.fs \| dd of=/dev/sda && shutdown -r"

akpoff / count_hlinks.sh

Last active July 14, 2016 23:04

Count Hard Links in a Directory

	#!/bin/sh

	# count hard links in a directory

	# blech -- includes current and present dir
	# ls -laRi \| cut -d ' ' -f 1 \| egrep '^[0-9]+' \| sort \| uniq -cd \| sort -n

	# better -A excludes . and ..
	# ls -lARi \| cut -d ' ' -f 1 \| egrep '^[0-9]+' \| sort \| uniq -cd \| sort -n

akpoff / network

Last active April 18, 2016 16:21

Configure wlan card under OpenBSD

	#!/bin/sh

	if=$1

	MUTEX=/tmp/network_config.$if

	if [ -f $MUTEX ]
	then
	echo "Wireless config for $if already in progress"
	exit

Aaron Poffenberger akpoff

curl commands to query imap servers

curl options

Building elm-lang on OpenBSD

Requirements

Overview - OpenBSD considerations