scy

This short post exists because I’ve asked whether Borg’s deduplication can only deal with data being appended to a file, not with data inserted at a position before the end of the file. A discussion emerged, and I said that I’d look into it some more.

tl;dr

I was wrong, Borg deals with that, although apparently not quite as efficient as restic. My initial test (that led to my tweet) was simply set up wrong.

Testing Borg’s deduplication

scy

#!/bin/sh

# Requires the (official) Speedtest CLI app available at ./speedtest
# Get it at <https://www.speedtest.net/apps/cli>

# Usage: speedlog.sh feed_id api_key
# Get the two arguments from your IoTPlotter.com feed.

# Currently, a single server (ID 1746) is hardcoded.
# I'll make this configurable soon™.

scy

Packets with “?” may have a wrong checksum, I’m not sure about those.

Format of a packet seems to be:
1 start byte
3 bytes header (I don’t understand it yet)
1 byte payload length
n bytes payload
1 byte checksum

Interested in what else I found out? Check the project page:

scy

This was supposed to be posted on the SC forums at scsynth.org, but I ran into the spam filter and thus saved it as a Gist first. It's on the forums now: My attempt to build SuperCollider on Termux/Android

I've been thinking about using SuperCollider on my phone. There's glastonbridge/SuperCollider-Android which hasn't been touched since 2014, so I thought I'll try to build a current version from source, based on the guide for Linux. Also, since Termux provides a great Linux CLI environment, including build toolchains, directly on the device, I wanted to try building SC under Termux.

Spoiler alert: I didn't manage to do it. The main problem is not having an audio driver, since the Linux build requires libjack, and neither Android nor Termux provide it. (Termux has

scy

package main

import (
	"fmt"
	"log"
	"syscall"
	"time"
	"unsafe"
	"unicode/utf16"
	"unicode/utf8"

scy

#!/bin/sh

# Only allow SSH logins after a push notification to your phone has been sent.
# Also sends a notification after logging out.
# This uses the Pushover service (pushover.net).
# If Pushover cannot be reached, the login will be denied!

# Add something like this to /etc/pam.d/sshd:
#     session required pam_exec.so /usr/local/bin/login-notify
# For Debian, a good place is after "@include common-account".

scy

#!/bin/sh
set -e

if [ "$(id -u)" -ne 0 ]; then
	printf 'WARNING: You will most likely need to be root, but continuing anyway ...\n' >&2
fi

url="$1"
if [ -z "$url" ]; then
	printf 'Please go to <http://phantomjs.org/download.html> and find the\n'

scy

import datetime

class UTC(datetime.tzinfo):
	ZERO = datetime.timedelta(0)
	def utcoffset(self, dt):
		return self.ZERO
	def tzname(self, dt):
		return 'UTC'
	def dst(self, dt):
		return self.ZERO

scy

Keybase proof

I hereby claim:

• I am scy on github.
• I am scy (https://keybase.io/scy) on keybase.
• I have a public key ASAdsSlXz8yCDiWmbQDYVCO2FiNRysGf4rIxRieOYynBIgo

To claim this, I am signing this object:

scy

Please see https://github.com/scy/scybtr/blob/master/btrsnap instead.