csgordon

Installing OpenBSD 7.3-current on a VisionFive2

Here are some concise instructions for getting OpenBSD 7.3-current running on a StarFive VisionFive 2 (v1.3B, though from other reports referenced below, it sounds like the v1.2 boards can also be made to work).

You will need:

• An SD card of at least 1GB
• An eMMC module attached to the board (though see below for a variation that should work to install directly to sd card)
• Internet access
• A USB TTL serial adapter that supports 3.3V (some of these support multiple voltages, but if yours only supports other voltages and not 3.3 it will either not work or damage your board!)

kconner

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

0xabad1dea

<div style="width:100%; font-family:serif;font-size:16px;text-align:justify;">
<div style="font-weight:900;text-align:center;font-size:48px;border-bottom:3px solid black;font-variant:small-caps;margin-bottom:0px;">
The Eggbug Times
</div>

<div style="font-style:italic; font-size:18px;text-align:center;">
the fourth website to ever exist
</div>

<div style="text-transform:uppercase;font-size:48px;text-align:center;">

senderle

So you want to modify the text of a PDF by hand...

If you, like me, resent every dollar spent on commercial PDF tools, you might want to know how to change the text content of a PDF without having to pay for Adobe Acrobat or another PDF tool. I didn't see an obvious open-source tool that lets you dig into PDF internals, but I did discover a few useful facts about how PDFs are structured that I think may prove useful to others (or myself) in the future. They are recorded here. They are surely not universally applicable --
the PDF standard is truly Byzantine -- but they worked for my case.

munificent

#include <time.h> //  Robert Nystrom
#include <stdio.h> // @munificentbob
#include <stdlib.h> //     for Ginny
#define  r return    //    2008-2019
#define  l(a, b, c, d) for (i y=a;y\
<b; y++) for (int x = c; x < d; x++)
typedef int i;const i H=40;const i W
=80;i m[40][80];i g(i x){r rand()%x;
}void cave(i s){i w=g(10)+5;i h=g(6)
+3;i t=g(W-w-2)+1;i u=g(H-h-2)+1;l(u

afresh1

Replacing the CenturyLink provided ethernet router with OpenBSD

Unfortunately CenturyLink provisions their fiber to the home with a PPPoE authentication over vlan 201, this makes replacing the router more difficult than it should be. I also had to call CenturyLink support to get the password for the PPPoE connection.

cnmac0 is the egress interface on my EdgeRouter Lite.

You also need to add match on pppoe0 scrub (max-mss 1452)

cyberang3l

GIT: How to extract a specific folder from a git repository branch, including the folder's related git history only

NOTE: If you want to keep the history for a specific folder in the master branch, just skip steps in lines 3,4,5,6,7

git clone <git-repository-url>
cd <git-repository-dir>

git checkout <branch-name>              # line 3; Checkout the branch of interest
git merge --strategy=ours master        # line 4; keep the content of this branch only and record a merge
git checkout master                     # line 5; Go back to the master branch

hunterbridges

HOWTO

Connect to Twitch.tv chat with an IRC client

1. Visit this website and get an OAuth Token for your Twitch account.
2. Add a server to your IRC client with this configuration, using your OAuth Token as the server password. Make sure it is not using SSL.

{
  address = "irc.twitch.tv";
chatnet = "Twitch";

erikvip

Import & Export Cygwin List of installed Packages

If you want to go from 32 to 64 bit Cygwin but keep all the packages[1], you might find yourself in a spot where you would like to export the list of cygwin packages and also be able to install cygwin with all these packages again. I will tell you how. Open your Cygwin shell and enter

cygcheck -c -d | sed -e "1,2d" -e 's/ .*\$//' > packagelist

This will simply dump a list of installed packages. To install Cygwin 64 with these packages selected, download setup-x86_64[2] and execute it with the command line parameters

./setup-x86_64 -P `awk 'NR==1{printf \$1}{printf ",%s", \$1}' packagelist`

jageall

#powershell script port of https://github.com/maxhauser/semver/
function toSemVer($version){
    $version -match "^(?<major>\d+)(\.(?<minor>\d+))?(\.(?<patch>\d+))?(\-(?<pre>[0-9A-Za-z\-\.]+))?(\+(?<build>[0-9A-Za-z\-\.]+))?$" | Out-Null
    $major = [int]$matches['major']
    $minor = [int]$matches['minor']
    $patch = [int]$matches['patch']
    
    if($matches['pre'] -eq $null){$pre = @()}
    else{$pre = $matches['pre'].Split(".")}