dakhnod

Scammer IP reporter

I creates this little configuration in order to get notified whenever someone visits a particular URL I created.

More specifically, this configuration requires the following setup:

1. Some program that sends a message to you, passed as parameters. In my case, an invocation could look like /root/bin/msg this is a message
2. Apache2 running
3. The ability to create and activate an apache2 configuration

The main purpose of this gist is to show to the world that apache can write log data not only to files, but also pipe it directly to scripts, in my case xargs.

dakhnod

#!/bin/bash

busses=$(dbus-send --print-reply --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.ListNames | grep -oP "(?<=string \")org.mpris.MediaPlayer2.*instance.*(?=\")")

for bus in $busses; do
  dbus-send --print-reply --dest=$bus /org/mpris/MediaPlayer2 org.mpris.MediaPlayer2.Player.Pause
done

dakhnod

#!/usr/bin/env cat

net_dhcp

source (http,destination_ip_or_host:destination_port)/grub/config

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#!/bin/bash

set -e

API_KEY='YOUR_HETZNER_API_TOKEN'

ids=`curl \
        -s \
        --header "Auth-API-Token: ${API_KEY}" \
        "https://dns.hetzner.com/api/v1/records" \

dakhnod

mount.img

This utility allows mounting .img files containing multiple partitions to the FS.

Usage

mount.img /path/to/file.img 2 /mnt/mount/point

with 2 being the partition index, as fdisk -l /path/to/file.img reports. First partition is 1.

dakhnod

Sine wave player

This example demonstrates how to play a sine wave through Pulse audio. Keep in mind that this code does NOT do any error handling. This is about the minimal amount code needed to play a sine wave.

How to compile

sudo apt install libpulse-dev
gcc sine.c -o play -lm -lpulse-simple

dakhnod

This information has been extracted from Varta datasheets.

Type	Capacity
Longlife AA	2800
Longlife Power AA	2970
Longlife Max Power AA	2980
Industrial Pro AA	2970
Longlife AAA	1230
Longlife Power AAA	1270

dakhnod

#!/bin/bash

if [[ ! "$1" || ! "$2" || ! "$3" ]]; then
	echo "Usage: mount_file IMAGE PARTITION_NUMBER MOUNTPOINT"
	exit 1
fi

line=(`fdisk -l "$1" | tr -d '*' | grep "$1$2"`)

mount -o loop,offset=$((512 * ${line[1]})),sizelimit=$((512 * ${line[3]})) $1 $3

dakhnod

One-line arduino binary counter

let's talk about how this works. Firstly, the rightmost expression calculates the passed seconds using millis(). millis() returns the milliseconds since boot of the arduino. By dividing through 1000 we get the number of seconds passed, as int.

Now about the PORTB register: This register controls the data on the output pins. Looking at pinouts, we can determine that Arduino UNO pins 8, 9, and 10 (and so forth) are connected to PB0, PB1, PB2, ..., or PORTB in general. Thus, setting the first bit of PORTB to 1 will lead to voltage being applied to pin 8. Here are some example values:

dakhnod

await new Promise((resolve) => {
	setTimeout(resolve, 60000);
})