nlm’s gists

nlm / connect-qemu-serial.sh

Created September 13, 2016 15:37

Connect to QEMU unix socket serial port

nlm / async_loop.py

Created October 18, 2016 08:18

python async loop demo to understand asyncio basics

	from functools import wraps
	from types import FunctionType, GeneratorType
	import logging
	import time

	def coroutine(f):
	@wraps(f)
	def wrapper(args, *kwargs):
	logging.debug('coroutine starting: {}'.format(f.__name__))
	return f(args, *kwargs)

nlm / ipaddr_sorter.py

Created October 28, 2016 12:18

Object to sort IP addresses according to a best-match in an ip networks list

	from ipaddr import IPv4Network, IPv4Address

	"""
	A module to sort ip addresses according to the best-match
	in an ip networks list. If no matching network is found, ip
	is sorted last.

	example:

	>>> networks = ['10.0.0.0/8', '172.16.0.0/12', '172.16.9.0/24']

nlm / demo_asyncio_queue_interrupt.py

Last active November 16, 2016 08:26

Demo of asyncio feeder/worker model using queue + interruption handling

	import asyncio
	import random

	queue = asyncio.Queue()

	@asyncio.coroutine
	def feeder():
	try:
	fid = random.randint(100, 999)
	print('feeder {} activated'.format(fid))

nlm / gist:a69407a3f652cfc7e2905909008c1633

Created December 2, 2016 14:16

Install pip package directly from Github

pip install git+https://github.com/USER/REPO.git

nlm / serialsh.bash

Created January 20, 2017 14:47

Login Shell to automatically connect to serial port via ssh

	#!/bin/bash
	name="$(basename $0)"
	echo "$name"
	if [[ "$name" =~ serialsh-(tty[a-zA-Z0-9]+)(-([0-9]+))? ]]; then
	tty="${BASH_REMATCH[1]}"
	speed="${BASH_REMATCH[3]}"
	exec screen -dR "serialsh-${tty}" "/dev/${tty}" $speed
	else
	echo "usage: $0"
	echo "symlink this file as serialsh-tty0 to access tty0"

nlm / disktest.sh

Last active May 4, 2017 15:24

Hard drive health testing on linux

	#!/bin/bash -u

	usage()
	{
	echo "usage: $0 [OPTIONS] DEVICE [DEVICE...]"
	echo
	echo "Options:"
	echo " -s\|--smart do a smart short test"
	echo " -e\|--smarterrors do a smart errors test"
	echo " -d\|--devstat do a smart devstat test"

nlm / macaddr.py

Created May 12, 2017 09:31

mac address <=> integer conversions in python

	import re

	def mac_to_int(mac):
	res = re.match('^((?:(?:[0-9a-f]{2}):){5}[0-9a-f]{2})$', mac.lower())
	if res is None:
	raise ValueError('invalid mac address')
	return int(res.group(0).replace(':', ''), 16)

	def int_to_mac(macint):
	if type(macint) != int:

nlm / my_state.sls

Last active July 3, 2017 13:05

Saltstack pattern to trigger commands when a pillar changes without storing it on the host in clear-text

	intermediate-state-file:
	file.managed:
	- name: /etc/.intermediate_state_file
	- contents: {{ salt['hashutil.sha256_digest'](salt['pillar.get']('my_pillar')\|string) }}

	my-cmd-1:
	cmd.wait:
	- name: "echo a command you want to run only when a my_pillar changes, but without storing it raw on the host"
	- watch:
	- file: intermediate-state-file

nlm / fan_control.ino

Created August 4, 2017 12:06

Arduino Fan Control

	#include <math.h>

	/* PWM fan control for arduino */

	const int rlyPin = 3; // digital 3 (optional relay)
	const int pwmPin = 4; // digital 4 (connected to fan pwm pin)
	const int ctrPin = A5; // analog 5 (connected to potentiometer measurement pin)
	const int tempPin = A6; // analog 6 (connceted to temperature probe)
	const int runCycles = 10000; // check new value every 10k cycles (2/sec)
	const uint32_t cycleDuration = 50; // 50us for 20kHz

Nicolas Limage nlm