Script for Omnia Turris making your router light with random colour every second.

 

 

 

#!/bin/bash
 
colors=('red' 'blue' 'green' 'white');
leds=('lan0' 'lan1' 'lan2' 'lan3' 'lan4' 'pwr' 'wan' 'pci1' 'pci2' 'pci3' 'usr1' 'usr2');
 
while true; do
    for led in "${leds[@]}"
    do
        rand_color=$[$RANDOM % 5]
        rainbow ${led} ${colors[rand_color]}
    done
    sleep 1;
done

To get this quickly working:

  1. login on your Turris router
  2. wget https://gitlab.com/snippets/34184/raw -O random_rainbow.sh
  3. bash random_rainbow.sh &
  4. you can logout now, script will be working in background

This topic presents who to setup kcov with cargo to get a test coverage for a cargo project, so I just assume you got kcov working in your Linux distribution and you have a project with source code and tests that you can run. I also assume you have gitlab-ci-multi-runner installed. So I will just quickly present who to configure it to use with GitLab CI to get test coverage badge in your new project.

I use my own CI runner, I’m not using shared runners or docker for it. So it’s pretty straightforward, your configuration will differ a bit.

Continue reading

In my spare time I develop applications on Android. I also “maintain” F-Droid repository for some of my public projects. I wanted to automatically publish each build after:

  1. Compilation passed
  2. Test on a connected device passed
  3. Signed build completed

So I made a simple setup with help of GitLabCI and own F-Droid repository. This post does not describe how to configure F-Droid repository or configuration of GItLabCI-runner, because official documentation is much better than I could write it. This post just describes how I use both services to automate boring deployment.

GtiLabCI is run on your own hardware, so it can have access to your files, configuration etc. It’s an advantage over Travis, as you can run any custom command, like testing on connected device or on pre-configured emulator, connected to remote hosts where CI slave is on a trusted machine.

Continue reading

fn main() {
  let mut path: PathBuf = get_app_dir();
  path.push(".config");
  path.set_file_name("properties");
  path.set_extension("ini");
  let str_path = path.to_str().unwrap();
  if str_path.len() != 0 && path_exists(&path) {
    println!("Path {} exists", str_path);
  }
}
 
fn get_app_dir() -> PathBuf {
    let dir: PathBuf = match env::home_dir() {
        Some(path) => PathBuf::from(path),
        None => PathBuf::from(""),
    };
    dir
}
 
pub fn path_exists(path: &PathBuf) -> bool {
    return Path::new(&path).exists();
}

I like to automate some boring and easy tasks we all have to do often, so I would like to share with you an easy but not too widely known trick in Debian/Ubuntu for automated upgrades, that can be performed without any manual actions.

This post describes the following configurations for a server:

  1. Installation and configuration of unattended upgrades on Debian
  2. Setup of Tor service that will be used for Debian upgrades
  3. Removal of unused dependencies

Unattended upgrades are well described on Debian wiki, but to keep those steps in one place, I’ll copy some parts of it here.

First, you have to install the following packages:

apt-get install unattended-upgrades apt-listchanges

Installation process should create new file /etc/apt/apt.conf.d/50unattended-upgrades where we configure how automated upgrades work and what can be upgraded.

Continue reading

I made a timelapse video using Raspberry Pi from my sea-front flat in Aberystwyth where I studied for 4 years.

Bash script was called every 30 seconds to take a picture for 4 days. To prevent running out of space on a SD card there was another cron job setup to move all existing images to my laptop using scp. After some selection (removed some first and some last images) I got 17.4GB of pictures which were composed into this timelapse without any scaling.

Timelapse from sea-front in Aberystwyth

…that’s why we published our product on OSI-compatible license! We <3 open-source!

Well, does Microsoft/Google/Apple/Netflix/XXX really love open-source?

No, they don’t. In fact they do more to extinguish open source by fighting them with patent wars, you don’t hear about, developing DRM, you hear about when it’s too late and dropping support for some key-products on open source platforms. Skype on Linux, anyone? Google Drive client on Linux? DRM enabled by default in browsers, anyone?

Continue reading

I’m working on a new Android project which I inherited. Well, I forked it because I didn’t feel welcomed to contribute to the project and I see a lot of places where improvements are needed.

First, I need to improve the codebase. Previous developers didn’t care about any Java coding guidelines from Oracle, Google, CERT or even Android. Some of the problems I have to solve now are:

  • inconsistent style
  • catch (Exception e){}
  • catch(Throwable e){}
  • ArrayList<Object> list = new ArrayList<String>()
  • complex methods – if {switch {for {if {else {}}}}
  • new Thread().start()

To quickly start clean-up and identify those problems, different static code analysis tools can be used; one of them is SonarQube.

Continue reading

Because I work on a laptop, I was experimenting with different wireless adb apks for Android, having a cable under my hand isn’t too handy. After a few tests I started getting that error:

com.android.ddmlib.InstallException: Unknown failure (/system/bin/sh: pm: can't execute: Permission denied)

Didn’t tell me much. I started Googling… No results. Ok, one result… taking me to Gitlab-CI of my project. So I had this before. I didn’t solve it, don’t know why. Probably because it was when I was experimenting with different ROMs on my another device. So I “fixed” it by reinstalling ROM, and it came back.

Not many things where helpful online so I had to find solution myself and here I present it to you, and to future me, when I have this again.

Continue reading

…that works in nginx:

add_header Content-Security-Policy
    "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' agilob.disqus.com disqus.com a.disquscdn.com referrer.disqus.com;
      img-src 'self' agilob.disqus.com disqus.com a.disquscdn.com referrer.disqus.com;
      style-src 'self' 'unsafe-inline' agilob.disqus.com disqus.com a.disquscdn.com referrer.disqus.com;
      font-src 'self';
      frame-src 'self' 'unsafe-inline' agilob.disqus.com disqus.com a.disquscdn.com referrer.disqus.com;
      object-src 'none'";