M. J. Fromberger creachadair

Book Recommendations

These are books, grouped by author name, that I have read or re-read in the past couple of years and that I think other people might enjoy.

Ann Leckie

Ancillary Justice
Ancillary Sword
Ancillary Mercy
Provenance

Notes on the POSIX Shell Language

Grammar: http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html

Recognition

Read input from a file or string.
[Token Recognition][tokr]: Split input into tokens: words and operators.
Split input into [Simple Commands][simc] and [Compound Commands][comc].

Bookmarklet Notes

Broadly speaking, a bookmarklet is just a bookmark containing a javascript: URL, e.g.,

javascript:void%28alert%28%22test%22%29%29

Note that the contents of the URL need to be escaped in the Usual Way™.

Google Chrome Encrypted Cookies

Google Chrome stores browser cookies in an SQLite database. The database has two tables, meta containing format and version metadata, and cookies with the contents of the cookies. The cookies table uses this schema:

-- To reproduce: sqlite path/to/Cookies .schema
CREATE TABLE cookies (
   creation_utc     INTEGER  NOT NULL,  -- microseconds since epoch
   host_key         TEXT     NOT NULL,  -- domain
   name             TEXT     NOT NULL,

Metadata Queries for ILoF

These queries require curl and jq.

Twitter handles for all guests who have them:

curl -s https://inlieuof.fun/guests.json | jq -r '[.guests[].twitter|select(.)]|sort[]'

Binary cookies file format

Browsers and other macOS applications use the NSHTTPCookieStorage API to store cookies. The API writes .binarycookies files in a specialized binary format. The binary file format has the following structure:

Bytes	Format	Description
4	text	magic number ('cook')
4	uint32 BE	page count (np)
*4 [i]	uint32 BE	page i data size S, bytes; *repeat np times
*S [i]	bytes	page i contents; *repeat np times

Interfaces and Satisfaction Checks in Go Packages

When a Go package defines a concrete type to implement some interface, it is common to ask the compiler to verify that your type satisfies the desired interface, e.g.,

package mything

import "some/other/pkg"

// Concrete implements pkg.Interface using a pellucid ammonite in

References for the FUSE protocol

https://john-millikin.com/the-fuse-protocol contains lots of detailed links
libfuse reference implementation

	do
	local log = hs.logger.new('mutation', 'info')
	local cmd_shift = {"cmd", "shift"}

	-- Mute or unmute the speaker according to the truth of t.
	local function mute(t)
	return string.format("set volume %s output muted",
	t and "with" or "without")
	end

	#!/usr/bin/env bash
	##
	## Usage: install-go.sh [<version>]
	## e.g.: install-go.sh 1.22.3
	##
	## If a version is omitted, the latest available release is installed.
	##
	## By default, the script installs a precompiled toolchain for the specified OS
	## and architecture. Set SOURCE=1 to build from source instead. Source builds
	## require a bootstrap toolchain, which the script will fetch if needed.