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Miles Richardson

Miles Richardson milesrichardson

Miles Richardson
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milesrichardson /
Created January 21, 2023 07:35
inherit environment variables from PID 1

You can inherit the environment variables from PID 1 by iterating over the list of null-terminated strings in /proc/1/environ, parsing the first characters up to the first = as the variable name, setting the remaining value as that variable, and exporting it.

The Code Snippet

This works with multiline environment variables, and environment variables with arbitrary values, like strings, including = or JSON blobs.

Paste this in your current terminal session to inherit the environment variables from PID 1:

milesrichardson / s3download_promise.js
Created August 11, 2017 16:27
S3 download promise: nodeJS promise to download file from amazon S3 to local destination
View s3download_promise.js
const AWS = require('aws-sdk');
const fs = require('fs')
const s3download = (bucketName, keyName, localDest) => {
if (typeof localDest == 'undefined') {
localDest = keyName;
let params = {
milesrichardson /
Last active January 25, 2023 05:37
bash command to open wireshark and capture packets in a remote docker container on a remote machine over SSH

capture those packets

run this command on local machine where wireshark is installed (e.g. MacOS)

export raw_pcap="$(mktemp -t pcap-raw)" ; \
echo "Raw pcap: $raw_pcap" ; \
wireshark -k -i <(ssh '\
  docker run --rm \
 --net container:$(docker ps -qf name=haproxy) \
milesrichardson /
Created August 2, 2022 21:37
Python script to create random wireguard peer by calling`wg genkey`, `wg pubkey` and `wg genpsk` with `subprocess` module
# Hopefully it saves you a few minutes looking at the subprocess docs
import os
import subprocess
env = os.environ.copy()
private_key = (
["wg", "genkey"],
milesrichardson /
Created October 22, 2019 16:45
Function for finding where missing symbol is defined
# Usage: find_symbol _ZN6icu_608ByteSinkD2Ev
# Output list of files on system where given symbol exists
# Symbol should be formatted as given by output of ldd -r
find_symbol() {
local symbol="$1"
while read -r filename ; do
readelf -Ws "$filename" 2>/dev/null | grep "$symbol" && echo "$filename" ;
done < <(find / -type f -name '*.so' -o -name '*.bc' -o -name '*.a')

Keybase proof

I hereby claim:

  • I am milesrichardson on github.
  • I am chatmasta ( on keybase.
  • I have a public key ASA1pwuWhn5aoMl1db7oYz9wXcLnR6z0rH90Yx4iGey-cAo

To claim this, I am signing this object:

milesrichardson /
Created October 23, 2019 18:46
How to keep GitHub forks up to date by leveraging GitLab repository mirroring to and from GitHub

What you want

  • A public fork of a public GitHub repository, say facebook/react
  • A private fork of the same public GitHub repository
  • Keep both forks always up to date with all branches of the upstream facebook/react repository
  • Selectively publish branches from the private fork to the public fork in order to submit pull requests to facebook/react

What you need

  • A GitHub account
milesrichardson /
Created May 17, 2020 01:00
"Spotify cannot play the current song" - So restart it! (restart spotify from mac command line)
#!/usr/bin/env bash
# I got sick of constantly getting the error from spotify that it cannot play
# the current song. It was really annoying to have to quit, open spotlight,
# Type "spot" and accidentally open spotlight system preferences, wait for spotify
# to open, etc...
# This script, on a mac, uses osascript to quit and relaunch spotify and press play
osascript -e 'tell application "Spotify" to quit'
milesrichardson /
Last active November 5, 2019 17:03
How to stop weird characters being inserted on paste in tmux

ChrisJohnsen/tmux-MacOSX-pasteboard#31 (comment)

What happens if you paste (in a pane where you see the problem) while running cat -v? Do you see something like ^[[200~hello world^[[201~? If so, what you are seeing is bracketed paste mode.

You should be able to turn the mode off by running printf '\e[?2004l'

milesrichardson /
Created October 16, 2019 02:17
Get shell in docker host VM on mac
docker run -it --rm --privileged --pid=host justincormack/nsenter1