Jake Jooncheol Kim fetiu

X11 forwarding on macOS and docker

A quick guide on how to setup X11 forwarding on macOS when using docker containers requiring a DISPLAY. Works on both Intel and M1 macs!

This guide was tested on:

macOS Catalina 10.15.4
docker desktop 2.2.0.5 (43884) - stable release
XQuartz 2.7.11 (xorg-server 1.18.4)
Macbook Pro (Intel)

Adding Sections to ELF Binaries

Suppose you need to add a section to an ELF binary to contain information gathered at compile time, but to be used at link time or run time. Here's how to add a section named .okdata and either populate it with data either after or before emitting the ELF binary.

Adding a Section After Emitting

In this case, you'll add file’s contents to an already existing binary. objcopy copies and translates object files, such that adding a new section is a matter of writing that new section’s contents into the ELF file.

(Optional) Create a simple program’s object file.

Use CC-tool for CC253X on my mac

Links

깃 리모트 변경 하기

기존 리포지토리 깔끔하게 pull / push

git pull
git add .
git commit -m "clean push"
git push

FFmpeg

A complete, cross-platform solution to record, convert and stream audio and video. Compiling for the Raspberry Pi takes a little more patience and care. Took lots of time to fully implement it on Pi using USB webcam. However, We also like to include support for H264 video, which needs to be installed before compiling FFmpeg. But one can skip this and simply move on to install FFmpeg only.

Important Information

From FFmpeg - ffserver has been removed. It's mean if we install latest version of FFmpeg, we won't get ffserver. However, let's download FFmpeg 3.4.4 "Cantor". We've downloaded and remane it only ffmpeg and save to Pi desktop. It has ffserver into it. However, it's a tar.xz file and we need to extract it. After extracting, name it simply ffmpeg. To extract, first install xz-utils package.

sudo apt-get install xz-utils

and use following command to extr

To forward X11 from inside a docker container to a host running macOS

Install XQuartz: https://www.xquartz.org/
Launch XQuartz. Under the XQuartz menu, select Preferences
Go to the security tab and ensure "Allow connections from network clients" is checked.
Run xhost + ${hostname} to allow connections to the macOS host *
Setup a HOSTNAME env var export HOSTNAME=`hostname`*
Add the following to your docker-compose:

 environment:

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

General rules

Follow standard conventions.
Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
Boy scout rule. Leave the campground cleaner than you found it.
Always find root cause. Always look for the root cause of a problem.

	{
	// See https://go.microsoft.com/fwlink/?LinkId=733558
	// for the documentation about the tasks.json format
	"version": "2.0.0",
	"options": {
	"env": {
	"OPENOCD_SCRIPTS": "${workspaceRoot}\\..\\OpenOCD-20170609\\share\\openocd\\scripts"
	}
	},
	"tasks": [

	{
	tokens=[
	space='regexp:\s+'
	identifier='regexp:[a-zA-Z][a-zA-Z0-9_]*'

	integer-constant='regexp:\d+'
	character-constant='regexp:[a-zA-Z]'
	floating-constant='regexp:[+-]?([0-9]*[.])?[0-9]+f'
	enumeration-constant='regexp:[a-zA-Z][a-zA-Z0-9_]*' // Same as identifier
	]