rsms

#!/bin/sh
set -eo pipefail

SOCKFILE="$HOME/Library/Application Support/Playbit/vconsole0.sock"

while [ $# -gt 0 ]; do case "$1" in
  -h|-help|--help) cat <<END
Connect a terminal to Playbit
Usage: $0 [--help | <sockfile>]
<sockfile> defaults to $SOCKFILE

rsms

Hurdles of macOS distribution

• Code signing
• Notarization
• Quarantine
• Distribution vehicles
• Notes

Code signing

rsms

// cc -std=c11 miniast.c -o miniast && ./miniast
#include "xcommon.h"
ASSUME_NONNULL_BEGIN

typedef enum AKind {
  AKindInt, // 123
  AKindAdd, // +
  AKindSub, // -
  AKindMul, // *
} AKind;

rsms

#!/bin/sh
#
# Usage:
#   sh build-fontkit.js.sh [<outfile>]
# <outfile> defaults to ./fontkit-VERSION.js
#
# This script builds fontkit.js for a web browser as an ES module script.
# Use the result like this:
#   <script type="module">
#   import fontkit from "./fontkit-2.0.2.js"

rsms

Compilers, programming languages and virtual machines

• https://github.com/rsms/move (2011)
• https://github.com/rsms/hue (2012)
• https://github.com/rsms/sol (2012)
• https://github.com/rsms/lum (2013)
• https://github.com/rsms/saturate (2013)
• https://github.com/rsms/rxlang (2014)
• https://github.com/rsms/coxlang (2016)
• https://github.com/rsms/co (2017)

rsms

#!/bin/sh
set -e

# Documentation and guides:
# https://docs.kernel.org/admin-guide/cgroup-v2.html
# https://lore.kernel.org/lkml/20160812221742.GA24736@cmpxchg.org/T/
# https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_monitoring_and_updating_the_kernel/using-cgroups-v2-to-control-distribution-of-cpu-time-for-applications_managing-monitoring-and-updating-the-kernel

# remove if already exists
[ -e /sys/fs/cgroup/test1 ] && rmdir /sys/fs/cgroup/test1

rsms

#!/bin/ash
# list installed packages sorted by file size

apk info -e -s \* >/tmp/apksize
awk 'NR % 3 == 1' /tmp/apksize | cut -d ' ' -f 1 > /tmp/apkname
awk 'NR % 3 == 2' /tmp/apksize > /tmp/apksize2

while read -r n unit; do
  B=$n
  case "$unit" in

rsms

Common terminology found in across literature and implementations:
  Page
    Region of memory. Usually 4096, 8192 or 16384 bytes
  Page Frame
    Same as a Page but when talking about physical memory. Same size as a Page.
  Page Table
    Per virtual address space table mapping virtual addresses to Pages.
  Page Directory
    Like Page Table and is often the same thing. The first level of Page Tables.
  PTE - Page Table Entry

rsms

import math, random, os.path
from perlin_noise import PerlinNoise
from math import pi as PI

def pathtext(text, pos, size, wght, opsz=32, **kwargs):
    t = FormattedString(
        font="Inter.var.ttf", fontSize=size, align="center",
        #openTypeFeatures={},
        fontVariations={"wght":wght,"opsz":opsz}, **kwargs)
    t.append(text)

rsms

// Find the latest version of this script here:
// https://gist.github.com/rsms/a8ad736ba3d448100577de2b88e826de
// 
const EM = 2048

interface FontInfo {
  familyName :string
  styleName  :string
  unitsPerEm :int
  ascender   :int