cho0h5

// gcc -lcurl curl_without_error_handling.c && ./a.out

#include <curl/curl.h>

int main() {
	CURL *curl = curl_easy_init();
	curl_easy_setopt(curl, CURLOPT_URL, "https://ziglang.org");
	curl_easy_perform(curl);
	curl_easy_cleanup(curl);
	return 0;

cho0h5

Traefik and cert-manager

Reference

https://traefik.io/blog/secure-web-applications-with-traefik-proxy-cert-manager-and-lets-encrypt/

cho0h5

#include "pico/stdlib.h"
#include "hardware/gpio.h"

const uint LED_PIN = 16;
const uint BUTTON_PIN = 15;

int init_pin() {
	gpio_init(LED_PIN);
	gpio_set_dir(LED_PIN, GPIO_OUT);
	gpio_init(BUTTON_PIN);

cho0h5

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClient.h>

#define SSID "your-ssid"
#define PASSWORD "your-passwd"

#define INFLUXDB_URL "http://localhost:8086/api/v2/write?org=your-org&bucket=your-bucket"

cho0h5

# In ~/.vimrc

set ts=4		" tab 크기를 4칸으로
set sw=4

set autoindent	" 자동 들여쓰기

syntax on		" syntax highlighting on

set nu			" 줄 번호 표시

cho0h5

# zfs smb 설정
sudo zfs set sharesmb=on yourpool/yourdataset
sudo zfs get sharesmb

# 그룹, 계정 생성
sudo groupadd -g 2000 yourgroup
sudo useradd -g yourgroup -s /sbin/nologin -u 2000 yourname

# smb 설치, 비밀번호 초기화
sudo apt install samba

cho0h5

# https://www.digitalocean.com/community/tutorials/how-to-set-up-a-samba-share-for-a-small-organization-on-ubuntu-16-04

docker run --rm -it \
	-p 445:445 \
	-v ~/tmp/nas/data:/samba/data \
	-e SMB_USERNAME=jane \
	-e SMB_USERPASSWD=jane \
	ubuntu /bin/bash
apt update && apt upgrade -y
apt install -y samba

cho0h5

// Based on https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WebServer/examples/HelloServer/HelloServer.ino

// Description
// Control built-in led in NodeMCU.
// Edit your SSID and PASSWD (line 19, 20)

// Usage
// /      -> blink shortly
// /on    -> turn led on
// /off   -> turn led off

cho0h5

#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/i2c.h"

struct calibration_data {
	int16_t	AC1;
	int16_t	AC2;
	int16_t	AC3;
	uint16_t AC4;
	uint16_t AC5;

cho0h5

void setup() {
  pinMode(13, OUTPUT);

  OCR0A = 0xF9; // 249
  TCCR0B = (1 << WGM01) | (1 << CS01);  // CTC, prescale
  TIMSK0 = (1 << OCIE1A); // interrupt
}

void loop() {
}