TheDiveO thediveo

## pype.py
import os
import tempfile
import atexit
import shutil
import time
import select

def writer(fifoname):
    print("writer: start...")
    w = open(fifoname, 'w')

## !DockerGoWorkspaces.md

      
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                thediveo
                / !DockerGoWorkspaces.md
            
            
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              May 6, 2023 15:57
            
              
                Dynamic Go workspace Docker build contexts
              
          
    (gist title)
This gist assumes the following directory structure:

foobar-ws/

bar/

bar.go
go.mod


foo/


foo.go


## !netlinknetns
gist title

## nsfdref.py
# nsfdref.py
#
# Creates two network namespaces, referencing the first one by fd, and
# showing the output of "lsns" versus "lsuserns". "lsuserns" is able
# to discover the first network namespace from the fd which keeps the
# namespace alive.
#
# Requires these Python3 packages:
# - pip3 install unshare
# - pip3 install python-prctl

## inversehierarchy.sh
#!/bin/bash

# Test the hypothesis that PID namespace hierarchy cannot "run on reverse" to
# the user namespace hierarchy. In particular, a PID child namespace cannot be
# owned by a parent user namespace. However, a PID namespace can be a child of a
# PID namespace owned by a parent user namespace.
echo "trying to create a child PID namespace which is owned by a parent user namespace..."

NSTEXTREPR='([[:alpha:]]+):\[([[:digit:]]+)\]'
SECTION="--------------------"

## runwithkp.sh
#!/bin/bash

CONTEXT="minikube"
PROXYCONTEXT="proxykube"

function cleanup {
    kubectl config delete-context $PROXYCONTEXT 2>/dev/null
    kubectl config delete-cluster $PROXYCONTEXT 2>/dev/null
}

## transcode-raw-screenrecording.sh
#!/bin/bash
# Correctly transcode in-device screen recordings from Android, so they
# do not cause all kinds of mishaps later down the editing and rendering
# pipeline. In particular, enforces a fixed framerate to avoid problems
# with widely varying dynamic frame rates, which can go from anywhere
# a frame every 10s of seconds to 100fps or so. Additionally, we
# enforce the correct color coefficients for the transcoding to avoid
# video tools to guesstimate completely nonsense transformation -- ffmpeg,
# I'm looking at you here.
shopt -s extglob

## registry.sh
#!/bin/bash
# TheDiveO

function log {
    local OPTS=""
    if [[ "$1" = "-n" ]]; then
        shift; OPTS+="-n"
    fi
    MSG="$1"
    shift

## tapclient.c
/* modified from: https://github.com/a34729t/exp/blob/master/tunclient.c */
#define _GNU_SOURCE
#include <sched.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <net/if.h>
#include <linux/if_tun.h>

## extract-frames
#!/bin/bash
#
# (Re-) Extract frame images directly from its corresponding video media
# file. The frame image filenames are expected to be in the format of
# videofilename-f000000.png, that is: the filename of the video media file,
# but without its extension, then followed by "-f" and a six digit frame
# number (base 10), and finally the ".png" suffix.
#
# Copyright 2018 TheDiveO
#
	import os
	import tempfile
	import atexit
	import shutil
	import time
	import select

	def writer(fifoname):
	print("writer: start...")
	w = open(fifoname, 'w')
	# nsfdref.py
	#
	# Creates two network namespaces, referencing the first one by fd, and
	# showing the output of "lsns" versus "lsuserns". "lsuserns" is able
	# to discover the first network namespace from the fd which keeps the
	# namespace alive.
	#
	# Requires these Python3 packages:
	# - pip3 install unshare
	# - pip3 install python-prctl
	#!/bin/bash

	# Test the hypothesis that PID namespace hierarchy cannot "run on reverse" to
	# the user namespace hierarchy. In particular, a PID child namespace cannot be
	# owned by a parent user namespace. However, a PID namespace can be a child of a
	# PID namespace owned by a parent user namespace.
	echo "trying to create a child PID namespace which is owned by a parent user namespace..."

	NSTEXTREPR='([[:alpha:]]+):\[([[:digit:]]+)\]'
	SECTION="--------------------"
	#!/bin/bash

	CONTEXT="minikube"
	PROXYCONTEXT="proxykube"

	function cleanup {
	kubectl config delete-context $PROXYCONTEXT 2>/dev/null
	kubectl config delete-cluster $PROXYCONTEXT 2>/dev/null
	}
	#!/bin/bash
	# Correctly transcode in-device screen recordings from Android, so they
	# do not cause all kinds of mishaps later down the editing and rendering
	# pipeline. In particular, enforces a fixed framerate to avoid problems
	# with widely varying dynamic frame rates, which can go from anywhere
	# a frame every 10s of seconds to 100fps or so. Additionally, we
	# enforce the correct color coefficients for the transcoding to avoid
	# video tools to guesstimate completely nonsense transformation -- ffmpeg,
	# I'm looking at you here.
	shopt -s extglob
	#!/bin/bash
	# TheDiveO

	function log {
	local OPTS=""
	if [[ "$1" = "-n" ]]; then
	shift; OPTS+="-n"
	fi
	MSG="$1"
	shift
	/* modified from: https://github.com/a34729t/exp/blob/master/tunclient.c */
	#define _GNU_SOURCE
	#include <sched.h>

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>
	#include <net/if.h>
	#include <linux/if_tun.h>
	#!/bin/bash
	#
	# (Re-) Extract frame images directly from its corresponding video media
	# file. The frame image filenames are expected to be in the format of
	# videofilename-f000000.png, that is: the filename of the video media file,
	# but without its extension, then followed by "-f" and a six digit frame
	# number (base 10), and finally the ".png" suffix.
	#
	# Copyright 2018 TheDiveO
	#