Today's links

Image: Cryteria, CC BY 3.0, modified · weren't

sudo apt-get install build-essential

sudo apt install -y libqpdf-dev libpaper-dev

/opt/homebrew/Cellar/qpdf/12.0.0/include/qpdf/InputSource.hh:85:19: error: function definition does not declare parameters
   85 |     qpdf_offset_t last_offset{0};
      |                   ^

c++ -o paperjam paperjam.o pdf-tools.o parse.o cmds.o pdf.o -lqpdf -lpaper
ld: library 'qpdf' not found

paperjam: $(OBJS)
	$(LD) -o $@ $^ $(LDLIBS)

CPPFLAGS="-I/opt/homebrew/include" LDLIBS="-L/opt/homebrew/lib -liconv" make paperjam

make qf

make blah

  env.NIX_LDFLAGS = lib.optionalString stdenv.hostPlatform.isDarwin "-liconv";

cp qf ~/bin

POST /oauth2/token HTTP/1.1
Host: acme.okta.com
Content-Type: application/x-www-form-urlencoded

grant_type=urn:ietf:params:oauth:grant-type:token-exchange
&requested_token_type=urn:ietf:params:oauth:token-type:id-jag
&audience=https://auth.slack.com/
&subject_token=eyJraWQiOiJzMTZ0cVNtODhwREo4VGZCXzdrSEtQ...
&subject_token_type=urn:ietf:params:oauth:token-type:id_token
&client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer
&client_assertion=eyJhbGciOiJSUzI1NiIsImtpZCI6IjIyIn0...

HTTP/1.1 200 OK
Content-Type: application/json
Cache-Control: no-store

{
  "issued_token_type": "urn:ietf:params:oauth:token-type:id-jag",
  "access_token": "eyJhbGciOiJIUzI1NiIsI...",
  "token_type": "N_A",
  "expires_in": 300
}

POST /oauth2/token HTTP/1.1
Host: auth.slack.com
Authorization: Basic yZS1yYW5kb20tc2VjcmV0v3JOkF0XG5Qx2

grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer
assertion=eyJhbGciOiJIUzI1NiIsI...

HTTP/1.1 200 OK
Content-Type: application/json
Cache-Control: no-store

{
  "token_type": "Bearer",
  "access_token": "2YotnFZFEjr1zCsicMWpAA",
  "expires_in": 86400
}

for term in $(toe -a | awk '{print $1}')
do
  echo $term
  infocmp -1 -T "$term" 2>/dev/null | grep 'clear=' | sed 's/clear=//g;s/,//g'
done

ps -p $$ -o pid,comm=

$ npm install -g http-server
$ http-server
bash: http-server: command not found

$ ~/.npm-global/bin/http-server
Starting up http-server, serving ./public

export PATH=$PATH:~/.npm-global/bin/

path=(
  $path
  ~/.npm-global/bin
)

set PATH $PATH ~/.npm-global/bin

$ which -a python3
/usr/bin/python3
/opt/homebrew/bin/python3

export PATH=/opt/homebrew/bin/:$PATH

set PATH ~/.cargo/bin $PATH

This is usually done by running one of the following (note the leading DOT):

. "$HOME/.cargo/env"        	# For sh/bash/zsh/ash/dash/pdksh
source "$HOME/.cargo/env.fish"  # For fish

fish_add_path /some/directory

unbuffer rg blah |  less -R

pbpaste | black - | pbcopy

tail -f /some/log/file | grep thing1 | grep thing2

tail -f /some/log/file | grep thing1 | grep thing2

sudo tcpdump -ni any port 53 | grep example.com

sudo tcpdump -ni any port 53 > output.txt

tail -f /some/log/file | grep thing1 | grep thing2

cat /some/log/file | grep thing1 | grep thing2 | tail

tail -f /some/log/file | grep --line-buffered thing1 | grep thing2

tail -f /some/log/file |  awk '/thing1/ && /thing2/'

tail -f /some/log/file |  grep -E 'thing1.*thing2'

tail -f /some/log/file | stdbuf -o0 grep thing1 | grep thing2

tail -f /some/log/file | unbuffer grep thing1 | grep thing2

$ cd /tmp/whatever
$ npm install chart.js
$ cd node_modules/chart.js/dist
$ ls *.*js
chart.cjs  chart.js  chart.umd.js  helpers.cjs  helpers.js

<script src="./chart.umd.js"> </script>

  "jsdelivr": "./dist/chart.umd.js",
  "unpkg": "./dist/chart.umd.js",
  "main": "./dist/chart.cjs",
  "module": "./dist/chart.js",

$ npm install @atcute/oauth-browser-client
$ cd node_modules/@atcute/oauth-browser-client/dist
$ ls *js
constants.js  dpop.js  environment.js  errors.js  index.js  resolvers.js

export { configureOAuth } from './environment.js';
export * from './errors.js';
export * from './resolvers.js';

<script type="importmap">
{
  "imports": {
    "nanoid": "./node_modules/nanoid/bin/dist/index.js",
    "nanoid/non-secure": "./node_modules/nanoid/non-secure/index.js",
    "nanoid/url-alphabet": "./node_modules/nanoid/url-alphabet/dist/index.js",
    "@atcute/oauth-browser-client": "./node_modules/@atcute/oauth-browser-client/dist/index.js",
    "@atcute/client": "./node_modules/@atcute/client/dist/index.js",
    "@atcute/client/utils/did": "./node_modules/@atcute/client/dist/utils/did.js"
  }
}
</script>

$ npm install @atproto/oauth-client-browser
$ cd node_modules/@atproto/oauth-client-browser/dist
$ ls *js
browser-oauth-client.js  browser-oauth-database.js  browser-runtime-implementation.js  errors.js  index.js  indexed-db-store.js  util.js

__exportStar(require("@atproto/oauth-client"), exports);
__exportStar(require("./browser-oauth-client.js"), exports);
__exportStar(require("./errors.js"), exports);
var util_js_1 = require("./util.js");

<script type="module" src="script.js"> </script>

import { BrowserOAuthClient } from "https://esm.sh/@atproto/oauth-client-browser@0.3.0"

$ stty -a
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>;
	eol2 = <undef>; erase = ^?; intr = ^C; kill = ^U; lnext = ^V;
	min = 1; quit = ^\; reprint = ^R; start = ^Q; status = ^T;
	stop = ^S; susp = ^Z; time = 0; werase = ^W;

$ strace -tt -o out  vim
$ grep ioctl out | grep SET

17:43:36.670636 ioctl(0, TCSETS, {c_iflag=IXANY|IMAXBEL|IUTF8,
c_oflag=NL0|CR0|TAB0|BS0|VT0|FF0|OPOST, c_cflag=B38400|CS8|CREAD,
c_lflag=ECHOK|ECHOCTL|ECHOKE|PENDIN, ...}) = 0

17:43:38.027284 ioctl(0, TCSETS, {c_iflag=ICRNL|IXANY|IMAXBEL|IUTF8,
c_oflag=NL0|CR0|TAB0|BS0|VT0|FF0|OPOST|ONLCR, c_cflag=B38400|CS8|CREAD,
c_lflag=ISIG|ICANON|ECHO|ECHOE|ECHOK|IEXTEN|ECHOCTL|ECHOKE|PENDIN, ...}) = 0

$ du -sh *.tsv
26M	ip2asn-v4.tsv
11M	ip2asn-v6.tsv

type IPRange struct {
	StartIP net.IP
	EndIP   net.IP
	Num     int
	Name    string
	Country string
}

CREATE TABLE ipv4_ranges (
   start_ip INTEGER NOT NULL,
   end_ip INTEGER NOT NULL,
   asn INTEGER NOT NULL,
   country TEXT NOT NULL,
   name TEXT NOT NULL
);
CREATE TABLE ipv6_ranges (
   start_ip TEXT NOT NULL,
   end_ip TEXT NOT NULL,
   asn INTEGER,
   country TEXT,
   name TEXT
);
CREATE INDEX idx_ipv4_ranges_start_ip ON ipv4_ranges (start_ip);
CREATE INDEX idx_ipv6_ranges_start_ip ON ipv6_ranges (start_ip);
CREATE INDEX idx_ipv4_ranges_end_ip ON ipv4_ranges (end_ip);
CREATE INDEX idx_ipv6_ranges_end_ip ON ipv6_ranges (end_ip);

	ips := []net.IP{}
	count := 20000
	for i := 0; i < count; i++ {
		// create a random IPv6 address
		bytes := randomBytes()
		ip := net.IP(bytes[:])
		ips = append(ips, ip)
	}
	now := time.Now()
	success := 0
	for _, ip := range ips {
		_, err := ranges.FindASN(ip)
		if err == nil {
			success++
		}
	}
	fmt.Println(success)
	elapsed := time.Since(now)
	fmt.Println("number per second", float64(count)/elapsed.Seconds())

sqlite> explain query plan select * from ipv6_ranges where '2607:f8b0:4006:0824:0000:0000:0000:200e' BETWEEN start_ip and end_ip;
QUERY PLAN
`--SEARCH ipv6_ranges USING INDEX idx_ipv6_ranges_end_ip (end_ip>?)

func memusage() {
	runtime.GC()
	var m runtime.MemStats
	runtime.ReadMemStats(&m)
	fmt.Printf("Alloc = %v MiB\n", m.Alloc/1024/1024)
	// write mem.prof
	f, err := os.Create("mem.prof")
	if err != nil {
		log.Fatal(err)
	}
	pprof.WriteHeapProfile(f)
	f.Close()
}

type IPRange struct {
	StartIP net.IP
	EndIP   net.IP
	Num     int
	Name    string
	Country string
}

type IPRange struct {
	StartIP netip.Addr
	EndIP   netip.Addr
	ASN     uint32
	Idx     uint32
}

type ASNInfo struct {
	Country string
	Name    string
}

type ASNPool struct {
	asns   []ASNInfo
	lookup map[ASNInfo]uint32
}

59.101.179.0	59.101.179.255	4294901931	Unknown	AS4294901931

<small>
[a link](https://example.com)
</small>

<small>

[a link](https://example.com)

</small>

<small> [a link](https://example.com) </small>

markup:
  goldmark:
    extensions:
      typographer:
        leftAngleQuote: '&lt;&lt;'
        rightAngleQuote: '&gt;&gt;'

1. a
  * b
  * c
2. b

* something
> quote
* something else

* # passengers: 20

`1 / (1
+ exp(-1)) = 0.73`

<p><code>1 / (1
+ exp(-1)) = 0.73</code></p>

<p>`1 / (1</p>
<ul>
<li>exp(-1)) = 0.73`</li>
</ul>

I set up a small Hadoop cluster (1 master, 2 workers, replication set to 
1) on 

"Oh, *interesting*!"

<img src="https://jvns.ca/images/rustboot1.png">

<br><br>

markup:
  highlight:
    codeFences: false
  goldmark:
    renderer:
      unsafe: true
    parser:
      autoHeadingIDType: blackfriday

def color(num, text):
    return f"\033[38;5;{num}m{text}\033[0m"

for i in range(16):
    print(color(i, f"number {i:02}"))

$ unbuffer fd . > out
$ vim out
^[[38;5;48mbad-again.sh^[[0m
^[[38;5;48mbad.sh^[[0m
^[[38;5;48mbetter.sh^[[0m
out

	// DELETE /records:
	case r.Method == "DELETE" && n == 1 && p[0] == "records":
		if !requireLogin(username, r.URL.Path, r, w) {
			return
		}
		deleteAllRecords(ctx, username, rs, w, r)
	// POST /records/<ID>
	case r.Method == "POST" && n == 2 && p[0] == "records" && len(p[1]) > 0:
		if !requireLogin(username, r.URL.Path, r, w) {
			return
		}
		updateRecord(ctx, username, p[1], rs, w, r)

	mux.HandleFunc("DELETE /records/", app.deleteAllRecords)
	mux.HandleFunc("POST /records/{record_id}", app.updateRecord)

	mux.Handle("DELETE /records/", requireLogin(http.HandlerFunc(app.deleteAllRecords)))

-- name: GetVariant :one
SELECT *
FROM variants
WHERE id = ?;

const getVariant = `-- name: GetVariant :one
SELECT id, created_at, updated_at, disabled, product_name, variant_name
FROM variants
WHERE id = ?
`

func (q *Queries) GetVariant(ctx context.Context, id int64) (Variant, error) {
	row := q.db.QueryRowContext(ctx, getVariant, id)
	var i Variant
	err := row.Scan(
		&i.ID,
		&i.CreatedAt,
		&i.UpdatedAt,
		&i.Disabled,
		&i.ProductName,
		&i.VariantName,
	)
	return i, err
}

export GOMEMLIMIT=250MiB

$ ls blah.txt

[bork@grapefruit linux-playground (main)]$ echo hi
hi
[bork@grapefruit linux-playground (main)]$ touch blah
[bork@grapefruit linux-playground (main)]$ echo hi
hi

bork@grapefruit ~/work/> echo hi

                         touch blah
                         echo hi

bork@grapefruit ~/work/> ls 
api/  blah.py     fly.toml   README.md
blah  Dockerfile  frontend/  test_websocket.sh

$ config.fish

$ vim ~/.config/fish/config.fish

for i in *.yaml
  echo $i
end

$ bash
$ for i in *.png
> do
> echo $i
> done
$ # press up arrow
$ for i in *.png; do echo $i; done ink

fish_add_path /some/directory

set PATH $PATH /some/directory/bin

{
  values: {'Preference': 10, 'Server': 'mail.example.com'},
  content: '10 mail.example.com',
  ...
}

type Thing struct {
    Name string
}

thing := Thing{"record"}
other_thing := thing
other_thing.Name = "banana"
fmt.Println(thing)

type Thing struct {
  Name string
}
func findThing(things []Thing, name string) *Thing {
  for _, thing := range things {
    if thing.Name == name {
      return &thing
    }
  }
  return nil
}

func main() {
  things := []Thing{Thing{"record"}, Thing{"banana"}}
  thing := findThing(things, "record")
  thing.Name = "gramaphone"
  fmt.Println(things)
}

func findThing(things []Thing, name string) *Thing {
  for i := range things {
    if things[i].Name == name {
      return &things[i]
    }
  }
  return nil
}

x := []int{1, 2, 3, 4, 5}
y := x[2:3]
y = append(y, 555)
fmt.Println(x)

$ ls l-^[[D^[[D^[[D

(reverse-i-search)`':

$ python3
>>> importt subprocess;5D

$ python3 -c "import readline; print(readline.__doc__)"
Importing this module enables command line editing using libedit readline.

$ jobs
Job Group State   Command
1   3161  running cat < /dev/zero &
2   3264  stopped nvim -w ~/.vimkeys $argv

$ echo kill %2
kill %2
$ type kill
kill is a function with definition
# Defined in /nix/store/vicfrai6lhnl8xw6azq5dzaizx56gw4m-fish-3.7.0/share/fish/config.fish

# start tcpdump
$ sudo tcpdump -ni any port 1234 &
tcpdump: data link type PKTAP
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on any, link-type PKTAP (Apple DLT_PKTAP), snapshot length 524288 bytes

# run curl
$ curl google.com:1234
13:13:29.881018 IP 192.168.1.173.49626 > 142.251.41.78.1234: Flags [S], seq 613574185, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 2730440518 ecr 0,sackOK,eol], length 0
13:13:30.881963 IP 192.168.1.173.49626 > 142.251.41.78.1234: Flags [S], seq 613574185, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 2730441519 ecr 0,sackOK,eol], length 0
13:13:31.882587 IP 192.168.1.173.49626 > 142.251.41.78.1234: Flags [S], seq 613574185, win 65535, options [mss 1460,nop,wscale 6,nop,nop,TS val 2730442520 ecr 0,sackOK,eol], length 0

# when you're done, kill the tcpdump in the background
$ kill %1 

Today's links

AI psychosis and the warped mirror (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

Conspiratorialism's causal chain (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

No such thing as selective censorship resistance (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

Wallet voting (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

Reverse centaurs are the answer to the AI paradox (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

Hate the player AND the game (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

Trump steals $400b from American workers (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

Today's links

Fingerspitzengefühl (permalink)

Hey look at this (permalink)

Object permanence (permalink)

Upcoming appearances (permalink)

Recent appearances (permalink)

Latest books (permalink)

Upcoming books (permalink)

Colophon (permalink)

How to get Pluralistic:

step 3: run `./configure` (if needed)

step 4: run `make`

`make` uses environment variables to configure the compiler and linker

secret environment variable: `CPPFLAGS`

two ways to pass environment variables to `make`

how to use `CPPFLAGS` and `LDLIBS` to fix this compiler error

tip: how to just build 1 specific file: `make $FILENAME`