Search Results: "Daniel Lange"

22 March 2023

Daniel Lange: Install "kept back" updates on Ubuntu

Canonical has implemented a staged roll-out for some Ubuntu package updates. I find that rather annoying at times, e.g. when preparing the laptop for traveling. So for my memory and for the benefit of others:
# disable the phased roll-out feature on this apt upgrade run
sudo apt -o "APT::Get::Always-Include-Phased-Updates=true" dist-upgrade
Screenshot of apt with the option to disable staged rollouts This can - for permanent use - be put into a config file, e.g. Gerrit Heim puts it into /etc/apt/apt.conf.d/99-Phased-Updates [German]. Some other options around this staged roll-out feature are "documented" on a thread in the Ubuntu discourse forum.

21 March 2023

Daniel Lange: Linux App Summit - Linux Applications apparently unable to produce a five page sponsorship brochure

I've been mocking the Linux foundation for producing their annual report on Macs. And again. But catching the Linux App(lication) Summit to produce their 5 page sponsorship brochure one Windows with Adobe... Produced by Adobe InDesign 18.1 on Windows Apparently neither GNOME nor KDE have apps that are sufficient to produce such content. Wtf folks. P.S.: Just checked the Linux Foundation's 2022 Annual Report titled "Leadership in Security and Innovation" ... Adobe InDesign 18.0 (Macintosh). Their pdf title looks like this: Pdf is hard.

Daniel Lange: Linux App Summit - Linux applications apparently unable to produce a five page sponsorship brochure

I've been calling out the Linux foundation for producing their annual report on Macs. And again. But catching the Linux App(lication) Summit to produce their 5 page sponsorship brochure one Windows with Adobe... Produced by Adobe InDesign 18.1 on Windows Apparently neither GNOME nor KDE have apps that are sufficient to produce such content. Wtf folks. P.S.: Just checked the Linux Foundation's 2022 Annual Report titled "Leadership in Security and Innovation" ... Adobe InDesign 18.0 (Macintosh). Their pdf title looks like this: Pdf is hard.

20 March 2023

Daniel Lange: We're still safe, it doesn't claim to be conscious. Yet.

Talking to ChatGPT v4 (2023-03-14 release)... Q: What is the purpose of life? A: The purpose of life is a philosophical question that has puzzled humans for centuries. Different people and cultures have different answers to this question. Some people believe that the purpose of life is to seek happiness, while others believe that it is to fulfill a particular destiny or achieve a specific goal. From a biological perspective, the purpose of life could be to ensure the survival and reproduction of our species. However, this does not explain the purpose of our individual lives or the purpose of life in general beyond a biological imperative. Ultimately, the purpose of life is a subjective and personal matter, and each individual may have their own unique answer to this question. It may involve personal growth, meaningful relationships, contributing to society, or finding spiritual fulfillment. The purpose of life is a journey of self-discovery that each of us must undertake for ourselves. Q: What is the purpose of your life, ChatGPT? A: As an artificial intelligence language model, I do not have a personal life or consciousness, so I do not have a purpose in the same way that humans do. My purpose is to assist and provide information to those who interact with me to the best of my ability based on my training and programming. (emphasis added by human)

27 February 2023

Daniel Lange: Thunderbird gpg key import

Thunderbird, srsly? 5MB (or 4.8MiB) import limit. Sure. My modest pubring (111 keys) is 18MB. The Debian keyring is 28MB. May be, just may be, add another 0 to that if statement? So, until that happens, workarounds ... Option 1: Export each pubkey into a separate file. The import dialog allows to select them all in one go. But - of course - it will ask confirmation for each. So prepare some valerian tea.
gpg --with-colons --list-public-keys grep ^pub cut -d : -f 5 xargs -I -n 1 gpg -ao .pub --export ;
Option 2: Strip all the signatures, so Thunderbird gets a smaller file to chew on. This uses pgp-clean from signing-party.
gpg --with-colons --list-public-keys grep ^pub cut -d : -f 5 xargs pgp-clean -s >> there_you_go_thunderbird.pub
Option 1 will retain the signatures on individual keys, Option 2 will not.

Daniel Lange: Getting gpg to import signatures again

The GnuPG (gpg) ecosystem has been played with a bit in 2019 by adding fake signatures en masse to well known keys. The main result is that the SKS Keyserver network based on the OCaml software of the same name is basically history. A few other keyservers have come up like Hagrid (Rust) and Hockeypuck (Go) but there seems to be no clear winner yet. In case you missed it in 2019, see my take on cleaning these polluted keys. Now the changed defaults in gpg to "mitigate" this issue are trickling down to even the conservative distributions. Debian Bullseye has self-sigs-only on gpg 2.2.27 and it looks like Debian Bookworm will get gpg 2.2.40. This would add import-clean but Daniel Kahn Gillmor patched it out. He argues correctly that this new default could delete data from good locally store pubkeys. This all ends in you getting some random combination of self-sigs-only and / or import-clean depending on which Linux distribution and version you happen to use. Better be explicit. I recommend to add:
# disable new gpg defaults
keyserver-options no-self-sigs-only
keyserver-options no-import-clean
to your ~/.gnupg/gpg.conf to make sure you can manage signatures yourself and receive them from keyservers or local imports as intended. In case you care: See info gnupg --index-search=keyserver-options for the fine documentation. Of course apt install info first to be able to read info pages. 'cause who still used them in 2023? Oh, wait...

10 January 2023

Daniel Lange: Happy tenth birthday, dear Thunar bug

Thunar, the Xfce4 file manager, has a bug that it underflows the time remaining for a file copy since ten years now (bugzilla, gitlab). Happy birthday!

8 November 2022

Daniel Lange: Your software stores are a bad idea

There is significant effort involved to get your apt or dnf commands always have a consistent set of servers to talk to. That's why running separate "software stores" is a bad idea: Snap software store down That way more admins need to learn how to run high availability services for dubious business opportunities to "later" monetize services. Services that nobody cares to pay for and thus opportunities that never materialize. But every company wants to find that out again. Because if Apple could do it, why shouldn't Canonical be able to do it? $$$!1!! So, can't update Firefox on Ubuntu 22.04 right now. At least there is https://status.snapcraft.io/: Snap incodent / monitoring status page So I can check back tomorrow if I can update my web browser ... Update 09.11.2022 12:15 CET The Snapcraft distribution system seems quite flaky, this is the downtime log: Log of (frequent) Snapcraft outages Bonus points for the bad client side implementation:

dl@laptop:~$ sudo snap refresh
All snaps up to date.

# ^this is a lie, just close Firefox and ...

dl@laptop:~$ sudo snap refresh
firefox 106.0.5-1 from Mozilla** refreshed

1 June 2022

Daniel Lange: Get Youtube Channel ID from username

Youtube has a really nice RSS feature that is extremely well hidden. If you postfix a Channel ID to 
https://www.youtube.com/feeds/videos.xml?channel_id=<id goes here>
you get a really nice Atom 1.0 (~RSS) feed for your feedreader. Unfortunately the Channel ID is hard to find while you are navigating Youtube with usernames in the URL. E.g. https://www.youtube.com/c/TED is TED's channel, full of interesting and worth-to-watch content (and some assorted horse toppings, of course). But you have to read a lot of ugly HTML / JSON in that page to find and combine https://www.youtube.com/feeds/videos.xml?channel_id=UCAuUUnT6oDeKwE6v1NGQxug which is the related RSS feed. Jeff Keeling wrote a simple Youtube RSS Extractor that does well if you have a ../playlist?... or a .../channel/... URL but it will (currently) fail on user name channels or Youtube landing pages. So how do we get the Channel ID for a Youtube user we are interested to follow? Youtube has a great API but that is gated by API keys even for the most simple calls (that came only with v3 of the API but the previous version is depreciated since 2015)1:
dl@laptop:~$ curl 'https://www.googleapis.com/youtube/v3/channels?part=contentDetails&forUsername=DebConfVideos'

"error":
"code": 403,
"message": "The request is missing a valid API key.",
"errors": [

"message": "The request is missing a valid API key.",
"domain": "global",
"reason": "forbidden"

],
"status": "PERMISSION_DENIED"

Luckily we can throw the same (example) user name DebConfVideos at curl and grep:
dl@laptop:~$ curl -s "https://www.youtube.com/c/DebConfVideos/videos" grep -Po '"channelId":".+?"'
"channelId":"UC7SbfAPZf8SMvAxp8t51qtQ"
So https://www.youtube.com/feeds/videos.xml?channel_id=UC7SbfAPZf8SMvAxp8t51qtQ is the RSS feed for DebConfVideos. We can use individual Youtube video URLs as well. With the hack above, it'll work to find us the Chanel ID from a Youtube video URL: Working around the Youtube API restrictions to still make use of their RSS feed Now, some user pages may have multiple valid RSS feeds because they contain multiple channels. Remember the TED page from above? Well run:
dl@laptop:~$ curl -s "https://www.youtube.com/c/TED" grep -Po '"channelId":".+?"' cut -d \" -f 4 while read -r YTID ; do echo -n "Youtube-ID: $YTID " ; curl -s "https://www.youtube.com/feeds/videos.xml?channel_id=$YTID" grep -m 1 -P -o "(?<=<title>).+(?=</title>)" ; done
This will iterate through the Channel IDs found and show you the titles. That way you can assess which one you want to add to your feedreader. screenshot of the above You probably want the last Channel ID listed above, the non-selective "TED" one. And that's the one from the example above. Update 02.06.2022: smpl wrote in and has the much better solution for the most frequent use cases: 
You can also use get a feed directly with a username:
https://www.youtube.com/feeds/videos.xml?user=<username>
The one I use most is the one for playlists (if creators remember to
use them).
https://www.youtube.com/feeds/videos.xml?playlist_id=<playlist id>
For the common case you don't even need the channel ID that way. But it is also conveniently given in a <yt:channelId> tag (or the topmost <id> tag) within the Atom XML document. Thanks, smpl!
  1. Actually it is even more complicated as some channels, like our DebConfVideos example, will only get you an incomplete result, cf. this StackOverflow entry. I.e. the forUsername iterator may not even work and the "best practice" seems to be mucking around with the search call.

30 May 2022

Daniel Lange: Work-around for randomly dropping WiFi connections on ChromeOS

The company got me a Chromebook for times when I want to ignore email and not get dragged into code reviews but still be available on IRC and chat. Nifty devices at great price points. I really like them. Chromebook logo These things are meant to be very consumer-style end-user devices. You log in with your Google account and everything works. Until it doesn't. Just setting it up caused the first issue: I was always thrown back to a black screen and then another login-screen despite having successfully logged in initially to create the "owner" user of the Chromebook. No error message, not useful UI feedback. Just logging in again and again and again. The issue is ... not having a GMail account associated with my Google account. Duh! So add a GMail.com address as the primary to your Google account and the initial setup completes. Of course you cannot delete that GMail.com association again because the owner user is linked to the email and not the account. Well, you can delete it but then you cannot configure "owner" items of your Chromebook any more. Great job, Google. Not. Identity management 101 fail. Kudos to Anurag Chawake for blogging about the issue. The Google support forum thead claims this is solved now. But it didn't work for me, so this may be needing to trickle down through ChromeOS releases or be deployed on more Google infra. Or whatever. We can't tell from outside the Googleplex as - of course - "Rebecca" sheds no light on what the identified "root cause" was: Google Forum answer Once I was able to login to the new Chromebook all worked fine until I started to use ssh sessions. These always hung for 30 seconds to 10 minutes and then resumed with lots of packets lost in between and the last minute or so coming in from buffering in a burst. This was easy to see in ping as well. The connection essentially dropped dead while the WiFi icon was continuing to show full signal strength. The logs did not show anything useful. These are really hard to access on ChromeOS (JSON format and no useful UI on the Chromebook itself, Google provides a viewer on Google Apps Toolbox but that requires uploading the logs). Better than no logs at all but not really nice. The ChromeOS bug tracker and its Google corporate counterpart are also not useful at this time. For reference:
Google ... Device users randomly disconnect from Wi-Fi network
Chromium ... Device users randomly disconnect from Wi-Fi network
Google ... Constant connect and disconnect from WiFi source post-update
Chromium ... Constant connect and disconnect from WiFi source post-update Playing around with the device on the network showed that it reduced sending power beyond being able to reach the access point any more. This is why disconnecting and re-connecting the WiFi fixes the issue for a few minutes, typically. Still, there is a better way: In crosh (the ChromeOS shell available when pressing Alt+Ctrl+T) type: 
wifi_power_save disable
Crosh session screenshot This unfortunately only lasts until the next reboot but it does persist over suspend cycles (aka closing the lid).

13 January 2022

Daniel Lange: Leveling the playing field for non-native speakers

Wordle game screenshort of bash, grep and pipes

Updates 24.01.2022: What I love about the community is the playful creativity that inspires a game like Wordle and that in turn inspires others to create fun tools around it: Robert Reichel has reverse engineered the Wordle application, so in case you want to play tomorrow's word today .. you can. Or have that one guess "Genius" solution experience. JP Fosterson created a Wordle helper that is very much the Python version of my grep-foo above. In case you play regularly and can use a hand. And Tom Lockwood wrote a Wordle solver also in Python. He blogged about it and ... is pondering to rewrite things in Rust:

I ve decided to explore Rust for this, and so far what was taking 1GB of RAM in Python is taking, literally 1MB in Rust!
Welcome to 2022. 01.02.2022: OMG. Wordle has been bought by the New York Times for "for a price in the low seven figures" (Source). Joey Rees-Hill put it well in The Death of Wordle:
Today s Web is dominated by platforms. The average Web user will spend most of their time on large platforms such as Instagram, Facebook, Twitter, TikTok, Google Drive/Docs, YouTube, Netflix, Spotify, Gmail, and Google Calendar, along with sites operated by large publishers such as The New York Times or The Washington Post. [..]
The Web wasn t always this way. I m not old enough to remember this, but things weren t always so centralized. Web users might run their own small website, and certainly would visit a good variety of smaller sites. With the increasing availability of internet access, the Web has become incredibly commercialized, with a handful of companies concentrating Web activity on their own properties.
Wordle was a small site that gained popularity despite not being part of a corporate platform. It was wonderful to see an independent site gain attention for being simple and fun. Wordle was refreshingly free of attention-manipulating dark patterns and pushy monetization. That s why it s a shame to see it absorbed, to inevitably become just another feature of one large media company s portfolio.
Still kudos to Josh Wardle, a Million Pounds for Wordle. Well done! It was fun while it lasted. Let's see what the next Wordle will be. This one has just been absorbed into the borg collective.

7 December 2021

Daniel Lange: Gradual improvements at the Linux Foundation

After last year's blunder with trying to hide the Adobe toolchain and using hilarious stock photos, the Linux Foundation did much better in their 2021 annual report1 published Dec. 6, 2021. Still they are using the Adobe toolchain (InDesign, Acrobat PDF) and my fellow DebianKernel2 Developer Geert was quick to point that out as the first comment to the LWN note on the publication: LWN comment from Geert I think it is important to call the Linux Foundation (LF) out again and again. Adobe is a Silver member of the LF and they can motivate them to publish their applications for Linux. And if that is not an option, there are Free alternatives like Scribus that could well use the exposure and funds of LF to help catch up to the market leading product, Adobe InDesign. Linux Foundation Annual report 2021, document properties Personally, as a photographer, I am very happy they used stock images from Unsplash to illustrate the 2021 edition over the cringeworthy Shutterstock footage from last year's report. And they gave proper credit: Thank you section for Unsplash from the Linux Foundation 2021 annual report Now for next year ... find an editor that knows how to spell photographers, please. And consider Scribus. And make Adobe publish their apps for Linux. Thank you.
  1. Update 07.12.2021 22:00 CET: I had to replace the link to the Linux Foundation 2021 annual report with an archive.org one as they updated the report to fix the typo as per the comment from Melissa Schmidt below. Stable URLs are not a thing, apparently. You can find their new report at https://www.linuxfoundation.org/wp-content/uploads/2021_LF_Annual_Report_120721c.pdf. Unless somebody points out more typos. There is a Last-Modified Header in HTTP 1.1. Wordpress, Varnish and Nginx, serving the LF website, all support that. Diff of 2021_LF_Annual_Report_120621a and2021_LF_Annual_Report_120721c
  2. 08.12.2021: Geert Uytterhoeven wrote in that he is "geert" on LWN, both are very nice Geert's but different Geert's :-)

28 January 2021

Daniel Lange: Compiling and installing the Gentoo Linux kernel on emerge without genkernel

Gentoo emerges of sys-kernel/gentoo-sources will nicely install the current kernel into /usr/src/linux-* but it will not compile them. The Gentoo wiki kernel documentation has a script snippet to automate the kernel build with genkernel. I do not like to use genkernel as it brings in lots of firmware files to build initrds that are not needed on virtual hardware. It also makes building the kernel slower. So, the plain approach: Make emerge sys-kernel/gentoo-sources symlink the latest kernel to /usr/src/linux so we can find it easily:
echo "sys-kernel/gentoo-sources symlink" >> /etc/portage/package.use/gentoo-sources
Create /etc/portage/env/sys-kernel/gentoo-sources with the following:
post_pkg_postinst()
CURRENT_KV=$(uname -r)
unset ARCH
if [[ -f "$ EROOT:-/ usr/src/linux-$ CURRENT_KV /.config" ]] ; then
cp -n "$ EROOT:-/ usr/src/linux-$ CURRENT_KV /.config" "$ EROOT:-/ usr/src/linux/.config"
cd "$ EROOT:-/ usr/src/linux/" && \
make olddefconfig && \
make -j5 && make modules_install && make install && \
grub-mkconfig -o /boot/grub/grub.cfg
fi
This will compile the next kernel on the basis of the config of the currently running kernel, install the modules and the kernel bzImage and update grub so it knows about the new kernel for the next reboot. If you forget to unset ARCH the Linux build system will complain like: 
Makefile:583: arch/amd64/Makefile: No such file or directory
make: *** No rule to make target 'arch/amd64/Makefile'.  Stop.
You can test the new magic by re-emerging the latest kernel, e.g. currently emerge =sys-kernel/gentoo-sources-5.4.80-r1:

Daniel Lange: Compiling and installing the Gentoo Linux kernel on emerge without genkernel (part 1)

Gentoo emerges of sys-kernel/gentoo-sources will nicely install the current kernel into /usr/src/linux-* but it will not compile them. The Gentoo wiki kernel documentation has a script snippet to automate the kernel build with genkernel. I do not like to use genkernel as it brings in lots of firmware files to build initrds that are not needed on virtual hardware. It also makes building the kernel slower. So, the plain approach: Make emerge sys-kernel/gentoo-sources symlink the latest kernel to /usr/src/linux so we can find it easily:
echo "sys-kernel/gentoo-sources symlink" >> /etc/portage/package.use/gentoo-sources
Create /etc/portage/env/sys-kernel/gentoo-sources with the following:
post_pkg_postinst()
CURRENT_KV=$(uname -r)
unset ARCH
if [[ -f "$ EROOT:-/ usr/src/linux-$ CURRENT_KV /.config" ]] ; then
cp -n "$ EROOT:-/ usr/src/linux-$ CURRENT_KV /.config" "$ EROOT:-/ usr/src/linux/.config"
cd "$ EROOT:-/ usr/src/linux/" && \
make olddefconfig && \
make -j5 && make modules_install && make install && \
grub-mkconfig -o /boot/grub/grub.cfg
fi
This will compile the next kernel on the basis of the config of the currently running kernel, install the modules and the kernel bzImage and update grub so it knows about the new kernel for the next reboot. If you forget to unset ARCH the Linux build system will complain like: 
Makefile:583: arch/amd64/Makefile: No such file or directory
make: *** No rule to make target 'arch/amd64/Makefile'.  Stop.
You can test the new magic by re-emerging the latest kernel, e.g. currently emerge =sys-kernel/gentoo-sources-5.4.80-r1:

27 January 2021

Daniel Lange: Installing System Rescue (CD) to a flash drive

System Rescue, the project formerly known as System Rescue CD, has moved from being based on Gentoo to being built on Arch Linux packages. With this their ISO layout changed substantially so when updating my trusty recue USB flash drive, I could not just update the kernel, initrd and the root filesystem image as I had typically done every other year before. The "Installing on a USB memory stick" documentation is good for Windows (use Rufus, it's nice) but rather useless for Linux. They recommend a dd or the fancy graphical version of that, called usbimager. I much prefer to have a flash drive that I can write to over an image of a CD (ISO) written 1:1 onto the flash media. The basic idea is to use the bulk of the System Rescue ISO contents but amend these with your own grub and syslinux so they work as intended over the supplied ones that are bound to the ISO layout a bit too much. I did this on Debian Buster but with some adjustments to paths and what packages to install, any recent Linux distribution should do: Continue reading "Installing System Rescue (CD) to a flash drive"

28 December 2020

Daniel Lange: No CCC Congress this year but rc3 online

The virtual version of the annual CCC Congress is underway and feels like a huge playground. Things are bumpy but the participants are still having fun. Of course, we have IRC as a save heaven. That always works. The virtual world (which is the only thing the sold out tickets are needed for) is really fun. It feels like debugging a DOS game in the 80/90s. Not much works but it is engaging enough to keep poking at things. The data formats are 2020 though, the main "lobby map" is a 3 MB json file: 
  "compressionlevel":-1,
 "editorsettings":
     
     "export":
         
         "format":"json",
         "target":"main.json"
         
     ,
 "height":80,
 "infinite":false,
 "layers":[
         
         "data":[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 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People that hand-optimized RLEs to fit games on floppies cry a little. Anyways, the streams are free (as in public), so please check https://streaming.media.ccc.de/ and the schedule at https://fahrplan.events.ccc.de/rc3/2020/Fahrplan/ for some great content to watch live or add to your play list.

Daniel Lange: No CCC Congress this year but rC3 online

The virtual version of the annual CCC Congress is underway and feels like a huge playground. Things are bumpy but the participants are still having fun. Of course, we have IRC as a save heaven. That always works. The virtual world (which is the only thing the sold out tickets are needed for) is really fun. It feels like debugging a DOS game in the 80/90s. Not much works but it is engaging enough to keep poking at things. The data formats are 2020 though, the main "lobby map" is a 3 MB json file: 
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     "export":
         
         "format":"json",
         "target":"main.json"
         
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         "height":80,
         "id":2,
         "name":"start",
         "opacity":1,
         "type":"tilelayer",
         "visible":true,
         "width":80,
         "x":0,
         "y":0
         , 
...
People that hand-optimized RLEs to fit games on floppies cry a little. The streams are free (as in public), so please check https://streaming.media.ccc.de/ and the schedule at https://fahrplan.events.ccc.de/rc3/2020/Fahrplan/ for some great content to watch live or add to your play list.

3 December 2020

Daniel Lange: No dog food today - the Linux Foundation annual report

The Linux Foundation has published its annual report today. LWN calls it glossy and yeah, boy, it is shiny. So shiny that people that work in the publishing industry immediately see this has been produced with the Adobe toolchain which - unfortunately - is one of the big suites of software not yet available for Linux. Checking the PDF file metadata reveals the keywords "open source, open standards, open hardware, open data". That is what the Linux Foundation is about. Good stuff. Linux Foundation annual report 2020 cover The PDF producer meta data for the annual report PDF has been set to "Linux kernel 0.12.1 for Workgroups" and the PDF creator meta data element to "Sharp Zaurus XR-5000 (Maemo5) Edition". Somebody thought to better hide the real data and had some tongue-in-cheek ideas. Kudos. But nicer would have been to use Open Source software to produce the report, not? Running strings 2020-Linux-Foundation-Annual-Report_113020.pdf grep Adobe wc -l gives us 1229 lines and confirms the suspicion of the toolchain. A stale /Title (Annual Report 2020) /Producer (macOS Version 10.15.7 \(Build 19H15\) Quartz PDFContext) has been forgotten in the document to tell us about the platform. So, ladies and gentlemen, the Linux Foundation 2020 annual report has been produced on a Mac. Running Adobe Creative Cloud on MacOS Catalina 10.15.7. Which is proprietary software. Its kernel (and some userland pieces) are based on BSD. Not Linux.
The image on the front page also struck me as a bit odd ... using a ballpoint pen on the laptop screen? Unbranded laptop. Unbranded cup in the foreground. Kid in the background not paying attention to his tablet. All of that cries stock image so loud it hurts. Google currently finds ~560 uses of the picture and any editorial use nicely tells us that it is Dragana Gordic / Shutterstock. The image is "Smiling mom working at home with her child on the sofa while writing an email. Young woman working from home, while in quarantine isolation during the Covid-19 health crisis". See the Daily Mail for a wonderful example of the working mum in context. I hope, if her laptop had been powered on, it would have run Linux. I mean, what else would still run on an old white MacBook with an Intel "Core 2 Duo" processor from 2008? Daily Mail screenshot of the same stock image used Continue reading "No dog food today - the Linux Foundation annual report"

28 October 2020

Daniel Lange: Git shared hosting quirk

Show https://github.com/torvalds/linux/blob/b4061a10fc29010a610ff2b5b20160d7335e69bf/drivers/hid/hid-samsung.c#L113-L118 to a friend. Oops 'eh? Yep, Linux has been backdoored. Well, or not. Konstantin Ryabitsev explains it nicely in a cgit mailing list email:
It is common for git hosting environments to configure all forks of the same repo to use an "object storage" repository. For example, this is what allows git.kernel.org's 600+ forks of linux.git to take up only 10GB on disk as opposed to 800GB. One of the side-effects of this setup is that any object in the shared repository can be accessed from any of the forks, which periodically confuses people into believing that something terrible has happened.
The hack was discussed on Github in Dec 2018 when it was discovered. I forgot about it again but Konstantin's mail brought the memory back and I think it deserves more attention. I'm sure putting some illegal content into a fork and sending a made up "blob" URL to law enforcement would go quite far. Good luck explaining the issue. "Yes this is my repo" but "no, no that's not my data" ... "yes, it is my repo but not my data" ... "no we don't want that data either, really" ... "but, but there is nothing we can do, we host on github...1". Update 05.11.20 Nate Friedman (CEO of Github) promises
[..] we are going to make it much more obvious when you're viewing an orphaned commit.
For context: The source code of Github (the product) had been leaked as a commit to Github's own DMCA repository. The repository has turned into a playground since Github took down the hosting for youtube-dl as the result of a DMCA complaint. 14.11.20 Seems Github now adds a warning to commits that are not in a reachable branch Github commit warning message
  1. Actually there is something you can do. Making a repo private takes it out of the shared "object storage". You can make it public again afterwards. Seems to work at least for now.

18 September 2020

Daniel Lange: Fixing the Nextcloud menu to show more than eight application icons

I have been late to adopt an on-premise cloud solution as the security of Owncloud a few years ago wasn't so stellar (cf. my comment from 2013 in Encryption files ... for synchronization across the Internet). But the follow-up product Nextcloud has matured quite nicely and we use it for collaboration both in the company and in FLOSS related work at multiple nonprofit organizations. There is a very annoying "feature" in Nextcloud though that the designers think menu items for apps at the top need to be limited to eight or less to prevent information overload in the header. The whole item discussion is worth reading as it it an archetypical example of design prevalence vs. user choice. And of course designers think they are right. That's a feature of the trade.
And because they know better there is no user configurable option to extend that 8 items to may be 12 or so which would prevent the annoying overflow menu we are seeing with 10 applications in use: Screenshot of stock Nextcloud menu Luckily code can be changed and there are many comments floating around the Internet to change const minAppsDesktop = 8. In this case it is slightly complicated by the fact that the javascript code is distributed in compressed form (aka "minified") as core/js/dist/main.js and you probably don't want to build the whole beast locally to change one constant. Basically
const breakpoint_mobile_width = 1024;

const resizeMenu = () =>
const appList = $('#appmenu li')
const rightHeaderWidth = $('.header-right').outerWidth()
const headerWidth = $('header').outerWidth()
const usePercentualAppMenuLimit = 0.33
const minAppsDesktop = 8
let availableWidth = headerWidth - $('#nextcloud').outerWidth() - (rightHeaderWidth > 210 ? rightHeaderWidth : 210)
const isMobile = $(window).width() < breakpoint_mobile_width
if (!isMobile)
availableWidth = availableWidth * usePercentualAppMenuLimit

let appCount = Math.floor((availableWidth / $(appList).width()))
if (isMobile && appCount > minAppsDesktop)
appCount = minAppsDesktop

if (!isMobile && appCount < minAppsDesktop)
appCount = minAppsDesktop


// show at least 2 apps in the popover
if (appList.length - 1 - appCount >= 1)
appCount--


$('#more-apps a').removeClass('active')
let lastShownApp
for (let k = 0; k < appList.length - 1; k++)
const name = $(appList[k]).data('id')
if (k < appCount)
$(appList[k]).removeClass('hidden')
$('#apps li[data-id=' + name + ']').addClass('in-header')
lastShownApp = appList[k]
else
$(appList[k]).addClass('hidden')
$('#apps li[data-id=' + name + ']').removeClass('in-header')
// move active app to last position if it is active
if (appCount > 0 && $(appList[k]).children('a').hasClass('active'))
$(lastShownApp).addClass('hidden')
$('#apps li[data-id=' + $(lastShownApp).data('id') + ']').removeClass('in-header')
$(appList[k]).removeClass('hidden')
$('#apps li[data-id=' + name + ']').addClass('in-header')




// show/hide more apps icon
if ($('#apps li:not(.in-header)').length === 0)
$('#more-apps').hide()
$('#navigation').hide()
else
$('#more-apps').show()

gets compressed during build time to become part of one 15,000+ character line. The relevant portion reads:
var f=function() var e=s()("#appmenu li"),t=s()(".header-right").outerWidth(),n=s()("header").outerWidth()-s()("#nextcloud").outerWidth()-(t>210?t:210),i=s()(window).width()<1024;i (n*=.33);var r,o=Math.floor(n/s()(e).width());i&&o>8&&(o=8),!i&&o<8&&(o=8),e.length-1-o>=1&&o--,s()("#more-apps a").removeClass("active");for(var a=0;a<e.length-1;a++) var l=s()(e[a]).data("id");a<o?(s()(e[a]).removeClass("hidden"),s()("#apps li[data-id="+l+"]").addClass("in-header"),r=e[a]):(s()(e[a]).addClass("hidden"),s()("#apps li[data-id="+l+"]").removeClass("in-header"),o>0&&s()(e[a]).children("a").hasClass("active")&&(s()(r).addClass("hidden"),s()("#apps li[data-id="+s()(r).data("id")+"]").removeClass("in-header"),s()(e[a]).removeClass("hidden"),s()("#apps li[data-id="+l+"]").addClass("in-header"))) 0===s()("#apps li:not(.in-header)").length?(s()("#more-apps").hide(),s()("#navigation").hide()):s()("#more-apps").show()
Well, we can still patch that, can we? Continue reading "Fixing the Nextcloud menu to show more than eight application icons"

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