kgaughan’s gists

kgaughan / selfmutex.py

Created March 8, 2019 15:26

Using a python script as its own mutex to prevent it executing concurrently with multiple instances of itself

	#!/usr/bin/env python3

	import contextlib
	import fcntl
	import sys
	import time


	class MutexException(Exception):
	"""

kgaughan / dyck.py

Created February 4, 2019 18:42

Testing for Dyck words. Inspired by: http://raganwald.com/2018/11/14/dyck-joke.html

	#!/usr/bin/env python3


	def is_dyck_word(word):
	i = 0
	for ch in word:
	if ch == '[':
	i += 1
	elif ch == ']':
	i -= 1

kgaughan / jslib.js

Created January 22, 2019 23:28

Some old JS code from an older version of my site. The timestamp is April 2006, but it probably dates from earlier. Looks to be a way to make smart blockquotes.

	function addEvent(obj, type, fn) {
	// Mozilla/W3C listeners?
	if (obj.addEventListener) {
	obj.addEventListener(type, fn, false);
	return true;
	}

	// IE-style listeners?
	if (obj.attachEvent) {
	return obj.attachEvent('on' + type, fn);

kgaughan / locking.py

Created January 21, 2019 16:04

Treating a script as its own mutex lock.

	import contextlib
	import fcntl
	import time


	class MutexException(Exception):
	"""
	Failed to lock a file.
	"""

kgaughan / gist:b0ed6852f681be576f61aa0d0bf01314

Last active December 12, 2017 14:33

Get A records for a given domain name

	get_nss () {
	dig +aaonly @$(dig +short $(echo $1 \| cut -f2- -d.) NS \| head -n1) $1 NS \| \
	grep -v '^;' \| \
	awk '$4 == "NS" {print substr($5, 1, length($5) - 1)}' \| sort -u
	}

	fqdn=google.com
	dig +short @$(get_nss $fqdn \| head -n1) $fqdn A

kgaughan / clicfgtest.py

Created September 8, 2017 14:05

Providing default arguments to argparse.ArgumentParser with a config file.

	#!/usr/bin/env python
	from __future__ import print_function

	import argparse
	import json
	import sys


	def process_args():
	parser = argparse.ArgumentParser()

kgaughan / bounce.py

Created August 13, 2017 13:49

Playing with some basic pygame: a simple full-screen bouncing box.

	#/usr/bin/env python

	import pygame
	from pygame.locals import *


	BOX_WIDTH = 100
	BOX_HEIGHT = 100

	BLACK = (0, 0, 0)

kgaughan / gist:87e2d67769cdae4993319f425afc9983

Last active July 28, 2017 15:10

	% python
	Python 2.7.10 (default, Feb 7 2017, 00:08:15)
	[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.34)] on darwin
	Type "help", "copyright", "credits" or "license" for more information.
	>>> class A(object):
	... pass
	...
	>>> a = A()
	>>> a.__class__.__dict__ is a.__class__.__dict__
	False

kgaughan / gist:f009b6a91bfb480f7d1aa4035913668b

Created July 4, 2017 10:52

Nope-ing the fuck out of here!

	% sudo pkg upgrade
	Updating FreeBSD repository catalogue...
	FreeBSD repository is up to date.
	All repositories are up to date.
	Checking for upgrades (178 candidates): 100%
	Processing candidates (178 candidates): 100%
	Checking integrity... done (2 conflicting)
	- postgresql95-client-9.5.7_1 conflicts with postgresql93-client-9.3.17_1 on /usr/local/bin/clusterdb
	- postgresql95-client-9.5.7_1 conflicts with postgresql93-client-9.3.17_1 on /usr/local/bin/clusterdb
	Checking integrity... done (0 conflicting)

kgaughan / gist:82a191702081bcb35d2dc41080b9a861

Created May 12, 2017 14:16

I know, this shouldn't bother me, but I resent seeing a chain of this kind of crud in my process list. Use 'exec', FFS!

	root 1677 0.0 0.0 108188 1412 ? S 02:33 0:00 /bin/bash -c ulimit -S -c 0 >/dev/null 2>&1 ; /usr/sbin/rabbitmq-server
	root 1679 0.0 0.0 108188 1480 ? S 02:33 0:00 /bin/sh /usr/sbin/rabbitmq-server
	root 1699 0.0 0.0 145024 1608 ? S 02:33 0:00 su rabbitmq -s /bin/sh -c /usr/lib/rabbitmq/bin/rabbitmq-server
	rabbitmq 1704 0.0 1.4 581156 30128 ? Ssl 02:33 0:11 /usr/lib64/erlang/erts-5.8.5/bin/beam -W w -K true -A30 -P 1048576 --

	get_nss () {
	dig +aaonly @$(dig +short $(echo $1 \| cut -f2- -d.) NS \| head -n1) $1 NS \| \
	grep -v '^;' \| \
	awk '$4 == "NS" {print substr($5, 1, length($5) - 1)}' \| sort -u
	}

	fqdn=google.com
	dig +short @$(get_nss $fqdn \| head -n1) $fqdn A

Keith Gaughan kgaughan