Search Results: "pm"

28 April 2020

Antoine Beaupr : Drowned my camera: dealing with liquid spills in electronics

Folks who acutely dig into this website might know that I have been taking more pictures recently, as I got a new camera since January 2018: a beautiful Fujifilm X-T2 that I really like. Recently, I went out on a photo shoot in the rain. It was intermittent, light rain when I left so I figured the "weather proofing" (dpreview.com calls this "environmentally sealed") would keep the camera secure. After an hour of walking outside, however, rain intensified and I was just quickly becoming more and more soaked. Still trusting the camera would function, I carried on. But after about 90 minutes of dutiful work, the camera just turned off and wouldn't power back on. It had drowned. I couldn't believe it; "but this is supposed to be waterproof! This can't be happening!", I thought. I tried swapping out the battery for a fresh one, which was probably a bad idea (even if I was smart enough to do this under cover): still no luck, yet I could still not believe it was dead, so I figured I would look at it later when I was home. I still eventually removed the battery after a while, remembering that it mattered. Turns out the camera was really dead. Even at home, it wouldn't power up, even with fresh batteries. After closer inspection, the camera was as soaked as I was...
Two Sandisk memory cards with water droplets on them ...even the SD cards were wet!
I was filled with despair! My precious camera! I had been waiting for litterally decades to find the right digital camera that was as close to the good old film cameras I was used to. I was even working on black and white "film" to get back to basics, which turned into a project to witness the impact of the coronavirus on city life! All that was lost, or at least stopped: amazingly, the SD cards were just absolutely fine and survived the flooding without problem.
A one-way sign broken, fallen on the side in a gray cityscape The last photo my camera took before it died
A good photographer friend told me that this was actually fairly common: "if you shoot outside, get used to this, it will happen". So I tried "the rice trick": plunge your camera in a pile of rice and let it rest there for a long time. It didn't work so well: I didn't have a big enough container to hold the camera and the rice. I was also worried about rice particles inserting themselves into the camera holes, as I had opened all the ports to let it dry. I could also not keep myself from inserting a battery and trying it out again: amazingly, it powered up, only once, and died again. After shopping in desperation for dessicators (who would have thought you should keep those little bags from the stuff you order online!), I ended up buying silica gel dehumidifier from Lee Valley (13$, the small one!) which comes in a neat little metal box. But that never arrived in time so I had to find another solution. My partner threw the idea out in jest, but the actual solution worked, and it was surprisingly simple!
My camera and lens drying in a food dehydrator, at 30 C with 22 hours left Tada! Turns out you can dehydrate hardware too!
We have a food dehydrator at home (a Sedna Express if you really want to know) since we do a lot of backpacking and canot-camping, but I never thought I would put electronics in there. Turns out a food dehydrator is perfect: it has a per degree temperature control that can go very low and a timer. I set it to 30 C for 24 hours. (I originally set it to 40 C but it smelled like plastic after a while so my partner turned it off thinking it was melting the camera.) And now the camera is back! I was so happy! There is probably some permanent damage to the delicate circuitry in the camera. And I will probably not go back out in heavy rain again with the camera, or at least not without a rainjacket (35$USD at B&H) on the camera. And I am now in a position to tell other people what to do if they suffer the same fate...

Tips for dealing with electronic liquid damage So, lessons learned...
  1. when you have a liquid spill over your electronics: IMMEDIATELY REMOVE ALL ELECTRIC POWER, including the battery! (this is another reason why all batteries should be removable)
  2. if the spill is "sticky" (e.g. coffee, beer, maple syrup, etc) or "salty", do try to wash it with water, yet without flooding it any further (delicate balance, I know) some devices are especially well adapted to this: I have washed a keyboard with a shower head and drowned the thing completely, it worked fine after drying.
  3. do NOT power it back on until you are certain the equipment is dry
  4. let the electronics device dry for 24 to 48 hours with all ports open in a humidity-absorbing environment: a bag of rice works, but a food dehydrator is best. make sure the rice doesn't get stuck inside the machine: use a small mesh bag if necessary
  5. once you are confident the device has dried, fiddle with the controls and see if water comes out: it might not have dried because it was stuck inside a button or dial. if dry, try powering it back on and watch the symptoms. if it's still weird, try drying it for another day.
  6. if you get tired of waiting and the machine doesn't come back up, you will have to send it to the repair shop or open it up yourself to see if there is soldering damage you can fix.
I hope it might help careless people who dropped their coffee or ran out in the rain, believing the hype of waterproof cameras. Amateur tip: waterproof cameras are not waterproof...

25 April 2020

Reinhard Tartler: Building Packages with Buildah in Debian

1 Building Debian Packages with buildah
Building packages in Debian seems to be a solved problem. But is it? At the bottom, installing the dpkg-dev package provides all the basic tools needed. Assuming that you already succeeded with creating the necessary packaging metadata (i.e., debian/changelog, debian/control, debian/copyright, etc., and there are great helper tools for this such ash dh-make, dh-make-golang, etc.,) it should be as simple as invoking the dpkg-buildpackage tool. So what's the big deal here?

The issue is that dpkg-buildpackage expects to be called with an appropriately setup build context, that is, it needs to be called in an environment that satisfies all build dependencies on the system. Let's say you are building a package for Debian unstable on your Debian stable system (this is the common scenario for the official Debian build machines), you would need your build to link against libraries in unstable, not stable. So how to tell the package build process where to find its dependencies?

The answer (in Debian and many other Linux distributions) is you do not at all. This is actually a somewhat surprising answer for software developers without a Linux distribution development background1. Instead, chroots "simulate" an environment that has all dependencies that we want to build against at the system locations, that is. /usr/lib, etc.

Chroots are basically full system installations in a subdirectory that includes system and application libraries. In order to use them, a package build needs to use the chroot(2) system call, which is a privileged operation. Also creating these system installations is a somewhat finicky process. In Debian, we have tools that make this process easier, the most popular ones are probably pbuilder(1)2 and sbuild(1)3. Still, they are somewhat clumsy to use, add significant levels of abstraction in the sense that they do quite a bit of magic behind the scenes to work hide the fact that privileged operations (need root to run chroot(2), etc.) are required. They are also somewhat brittle, for instance, if a build process is aborted (SIGKILL, or system crash), you may end up with temporary directories and files under userids other than your own that again may require root-privileges to cleanup.

What if there was an easy way to do all of the above without any process running as root? Enter rootless buildah.

Modern Linux container technologies allow unprivileged users to "untie" a process from the system (cf. the unshare(2) system call). This means that a regular user may run a process (and its child processes) in an "environment" where system calls behave differently and provide a configurable amount of isolation levels. This article demonstrates a novel build tool buildah, which is:
  • easy to setup build environment from the command line
  • secure, as no process needs to run as root
  • simple in architecture, requires no running daemon like for example docker
  • convenient to use: you can debug your debian/rules interactively
Architecturally, buildah is written in golang and compiled as a (mostly) statically linked executable. It builds on top a number of libraries written in golang, including github.com/containers/storage and github.com/containers/image. The overlay functionality is provided by the fuse-overlayfs(1) utility.

1.1 Preparation:
The Kernel in Debian bullseye (and in buster, and recent Ubuntu kernels to the best of my knowledge) do support usernamespaces, but leave them disabled by default. Here is how to enable them:
echo kernel.unprivileged_userns_clone = 1   sudo tee -a /etc/sysctl.d/containers.conf
systemctl -p /etc/sysctl.d/containers.conf
I have to admit that I'm not entirely sure why the Debian kernels don't enable usernamespaces by default. I've found a reference on stackexchange4 that claims this disables some "hardening" features in the Debian kernel. I also understand this step is not necessary if you chose to compile and run a vanilla upstream kernel. I'd appreciate a better reference and am happy to update this text.
$ c=$(buildah from docker.io/debian:sid)
Getting image source signatures
Copying blob 2bbc6b8c460d done
Copying config 9b90abe801 done
Writing manifest to image destination
Storing signatures
This command downloads the image from docker.io and stores it locally in your home directory. Let's install essential utilities for building Debian packages:
1: buildah run $c apt-get update -qq
2: buildah run $c apt-get install dpkg-dev -y
3: buildah config --workingdir /src $c
4: buildah commit $c dpkg-dev
The command on line 1 and 2 execute the installation of compilers and dpkg development tools such as dpkg-buildpackage, etc. The buildah config command in line 4 arranges that whenever you start a shell in the container, the current working directory in the container is in /src. Don't worry about this location not existing yet, we will make sources from your host system available there. The last command creates an OCI image with the name dpkg-dev. BTW, the name you use for the image in the commit command can be used in podman (but not the "containers"). See 5 and 6 for a comparison between podman and buildah.
buildah images -a
This output might look like this:
  REPOSITORY                 TAG      IMAGE          ID   CREATED   SIZE             
localhost/dpkg-dev latest b85c34f95d3e 16 seconds ago 406 MB
docker.io/library/debian sid 9b90abe801db 11 hours ago 124 MB

1.2 Running a package build
Now we have a working container with the reference in the variable $c. To use it conveniently with source packages that I have stored in /srv/scratch/packages/containers, let's introduce a shell alias r like this:
alias r='buildah run --tty -v /srv/scratch/packages/containers:/src $c '
This allows you to easily execute commands in that container:
r pwd
r bash
The last command will give you an interactive shell that we'll be using for building packages!
siretart@x1:~/scratch/packages/containers/libpod$ r bash

root@x1:/src# cd golang-github-openshift-imagebuilder

root@x1:/src/golang-github-openshift-imagebuilder# dpkg-checkbuilddeps
dpkg-checkbuilddeps: error: Unmet build dependencies: debhelper (>= 11) dh-golang golang-any golang-github-containers-storage-dev (>= 1.11) golang-github-docker-docker-dev (>= 18.09.3+dfsg1) golang-github-fsouza-go-dockerclient-dev golang-glog-dev

root@x1:/src/golang-github-openshift-imagebuilder# apt-get build-dep -y .
Note, using directory '.' to get the build dependencies
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
[...]

root@x1:/src/golang-github-openshift-imagebuilder# dpkg-checkbuilddeps

root@x1:/src/golang-github-openshift-imagebuilder#
Now we have a environment that has all build-dependencies available and we are ready to build the package:
root@x1:/src/golang-github-openshift-imagebuilder# dpkg-buildpackage -us -uc -b
Assuming the package builds, the package build results are placed in /src inside the container, and are visible at ~/scratch/packages/containers on the host. There you can inspect, extract or even install them. The latter part allows you to interactively rebuild packages against updated dependencies, without the need of setting up an apt archive or similar.

2 Availability
The buildah(1) tool is available in debian/bullseye since 2019-12-17. Since is a golang binary, it only links dynamically against system libraries such as libselinux and libseccomp, which are all available in buster-backports. I'd expect buildah to just work on a debian/buster system as well provided you install those system libraries and possibly the backported Linux kernel.

Keeping the package at the latest upstream version is challenging because of its fast development pace that picks up new dependencies on golang libraries and new versions of existing libraries with every new upstream release. In general, this requires updating several source packages, and in many cases also uploading new source packages to the Debian archive that need to be processed by the Debian ftp-masters.

As an exercise, I suggest to install the buildah package from bullseye, 'git clone' the packaging repository from https://salsa.debian.org/go-team/packages/golang-github-containers-buildah and build the latest version yourself. Note, I would expect the above to even work on a Fedora laptop.

The Debian packages have not swept into the Ubuntu distributions yet, but I expect them to be included in the Ubuntu 20.10 release. In the mean time, ubuntu users can install the package that are provided by the upstream maintainers in the "Project Atomic" PPA at https://launchpad.net/~projectatomic/+archive/ubuntu/ppa

3 Related Tools
The buildah tool is accompanied with two "sister" tools:

The Skopeo package provides tooling to work with remote images registries. This allows you download, upload images to remote registries, convert container images between different formats. It has been available in Debian since 2020-04-20.

The podman tool is a 'docker' replacement. It provides a command-line interface that mimics the original docker command to an extend that a user familiar with docker might want to place this in their ~/.bashrc file:
alias docker='podman'
Unfortunately, at the time of writing podman is still being processed by the ftp-masters since 01-03-2020. At this point, I recommend building the package from our salsa repository at https://salsa.debian.org/debian/libpod

4 Conclusion
Building packages in the right build context is a fairly technical issue for which many tools have been written for. They come with different trade-off when it comes to usability. Containers promise a secure alternative to the tried and proven chroot-based approaches, and the buildah makes using this technology very easy to use.

I'd love to get into a conversation with you on how these tools work for you, and would like to encourage participation and assistance with keeping the complicated software stack up-to-date in Debian (and by extension, in derived distribution such as Ubuntu, etc.).

Footnotes:
1
At my day-job, we build millions of lines of C++ code on Solaris10 and AIX6, where concepts such as "chroots" are restricted to the super user 'root' and is therefore not available to developers, not even through wrappers. Instead, libraries and headers are installed into "refroots", that is, subdirectories that mimic the structure of the "sysroot" directories that are used in the embedded Linux community for cross-compiling packages, and we use Makefiles that set include flags (-I rules and -L flags) to tell the compiler and linker where to look.

24 April 2020

Mark Brown: Book club: Our Software Dependency Problem

A short while ago Daniel, Lars and I met to discuss Russ Cox s excellent essay Our Software Dependency Problem. This essay looks at software reuse in general, especially in the context of modern distribution methods like PyPI and NPM which make the whole process much more frictionless than traditional distribution methods used with languages like C. Possibly our biggest conclusion was that the essay is so eminently sensible that we mostly just talked about how much we agreed with it and how comprehensive it was, we particularly admired the clarity with which it explores how to evaluate the quality of free software projects. Next time we ll have to pick something more controversial to discuss!

19 April 2020

Dirk Eddelbuettel: prrd 0.0.3: More improvements

Back in early 2018, the prrd package was introduced as release 0.0.1, uploaded to CRAN, and updated once as release 0.0.2. I have used it extensively for every CRAN release of Rcpp, RcppArmadillo, RcppEigen, BH, and possibly others. The idea of prrd is simple, and described in some more detail on its webpage and its GitHub repo. Reverse dependency checks are an important part of package development and is easily done in a (serial) loop. But these checks are also generally embarassingly parallel as there is no or little interdependency between them (besides maybe shared build depedencies). See the following (dated) screenshot (running six parallel workers, arranged in split byobu session). Since the two early releases, I made a few changes to e.g. the analysis of package checks and their summaries (but never pushed these) as well as a few usability enhancements. This release regroups these. The release is summarised in the NEWS entry:

Changes in prrd version 0.0.3 (2020-04-19)
  • Extended functionality summarise() with optional use of package foghorn (Dirk)
  • New scripts enqueueDepends, dequeueDepends and summmariseJobs (Dirk)
  • Added tweaks and enhancements throughout (Dirk)
  • The default queue location can now be set via options (Dirk)
  • Meta-data on package, version and date is now stored, and shown on dequeue startup (Dirk)
  • The README.md was clarified and improved (Dirk, Avraham Adler in #8, Robert Nuske in #10)

CRANberries provides the usual summary of changes to the previous version. See the aforementioned webpage and its repo for details. For more questions or comments use the issue tracker off the GitHub repo. If you like this or other open-source work I do, you can now sponsor me at GitHub. For the first year, GitHub will match your contributions.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.

Russ Allbery: Review: Beyond the Galaxy

Review: Beyond the Galaxy, by Ethan Siegel
Publisher: World Scientific
Copyright: 2016
ISBN: 981-4667-16-1
Format: Kindle
Pages: 370
In the preface of this book, Ethan Siegel recounts his experience as a new college professor in 2009, thrilled to learn that he would be teaching the college's introductory astronomy class. The only disappointment was that he could not find a textbook that described astronomy the way that he wanted to teach it. Siegel did not want to simply describe the current astronomical understanding. He wanted to start at the beginning and tell a story. What questions did we start with? How did we answer them? What new questions did those answers provoke? I enjoyed Sabine Hossenfelder's Lost in Math, but I'm even happier that she included in it a recommendation of Beyond the Galaxy as a good introduction to modern astronomy. I am completely in agreement with Siegel: Astronomy is interesting however it is described, but the best presentation for the interested lay person who does not intend to become a professional astronomy is chronological. (I feel the same way about physics and mathematics.) The narrative structure of scientific discovery draws me in every time. It's so satisfying to see our knowledge growing, breakthrough by breakthrough, only to meet the next puzzling inconsistency. It also is a natural fit for bringing someone up to speed on a field, since the history of the field starts with simpler questions and problems, and the complications of later discoveries build on the gaps left by earlier theories. Siegel tells that story well. Beyond the Galaxy starts with observations of seasonal changes in the path of the Sun through the sky and phases of the moon, quickly moves on to Eratosthenes's calculation of the circumference of the Earth, and continues at pace through early astronomy. The first chapter brings the reader up to the start of the 20th century, after which Siegel slows down and spends the remaining 10 chapters on the last 100 years: special and general relativity, the expansion of the universe, the Big Bang, dark matter, dark energy, the inflationary period, and more. For me, this was perfect. The story of early astronomy and the fight over the heliocentric model of the universe is worth telling, but it's been told many times before and features prominently in history books outside of science classes. The weight of material in this book matched my interest: What new developments have there been after general relativity and the Big Bang theory? What inconsistencies are dark matter and dark energy explaining? What is the inflationary period and how did it modify the Big Bang theory? (My half-formed impression of this part of astronomy from news articles turned out to be almost entirely wrong.) And how do we know all of this? The question of how we know as much as we do about the early origins of the universe turned out to be far more interesting than I had realized. It's one of those pieces of science where, when given only the conclusions, it's hard to imagine how our theories could be as complete as they are. Siegel is a bit repetitive in how he talks about theory development and occasionally skims over the details to avoid getting too deep into techniques and math, but he does a great job explaining the predictions of a theory, the design of experiments to prove or disprove those predictions, and the implications for the boundaries of what we know. This is the first time someone has explained the theorized origin of matter-antimatter asymmetry in sufficient detail that I was able to understand and internalize it. Dark matter and dark energy are the current topics of astronomy that get the most press, and the coverage of both is very good here. I was particularly fascinated by the link between dark matter and the superstructures of the universe that we've discovered. Astronomy does scale in a way that no other science can manage, and the scale of structure we've discovered and been able to map has gone up considerably since the last time I refreshed my astronomical knowledge. If you're looking for a math-light, comprehensive introduction to modern astronomy, I can wholeheartedly recommend this book. That goes double if you, like me, prefer a chronological view of scientific discovery so that you can understand what questions people were trying to answer and how our understanding changed over time. One note on format: Astronomy being what it is, this book is very heavy on pictures. It is not at all suitable for a dedicated ebook reader. The Kindle tries, but the combination of a small screen and black and white e-ink fail miserably. I switched to reading on a tablet, and that was a far better experience. The Kindle app still struggles to put the figures next to the text that discusses them, but that's a typesetting problem that I often have with physical books as well. If you don't have a tablet and you aren't willing to read on a computer screen, you probably want a physical copy of this one (which, sadly, means academic textbook pricing). Rating: 8 out of 10

17 April 2020

Daniel Kahn Gillmor: Tech-assisted Contact-Tracing against the COVID-19 pandemic

Today at the ACLU, we released a whitepaper discussing how to evaluate some novel cryptographic schemes that are being considered to provide technology-assisted contact-tracing in the face of the COVID-19 pandemic. The document offers guidelines for thinking about potential schemes like this, and what kinds of safeguards we need to expect and demand from these systems so that we might try to address the (hopefully temporary) crisis of the pandemic without also creating a permanent crisis for civil liberties. The proposals that we're seeing (including PACT, DP^3T, TCN, and the Apple/Google proposal) work in pretty similar ways, and the challenges and tradeoffs there are remarkably similar to Internet protocol design decisions. Only now in addition to bytes and packets and questions of efficiency, privacy, and control, we're also dealing directly with risk of physical harm (who gets sick?), society-wide allocation of scarce and critical resources (who gets tested? who gets treatment?), and potentially serious means of exercising powerful social control (who gets forced into quarantine?). My ACLU colleague Jon Callas and i will be doing a Reddit AMA in r/Coronavirus tomorrow starting at 2020-04-17T19:00:00Z (that's 3pm Friday in TZ=America/New_York) about this very topic, if that's the kind of thing you're into.

15 April 2020

Antoine Beaupr : OpenDKIM configuration to send debian.org email

Debian.org added support for DKIM in 2020. To configure this on my side, I had to do the following, on top of my email configuration.
  1. add this line to /etc/opendkim/signing.table:
    *@debian.org marcos-debian.anarcat.user
    
  2. add this line to /etc/opendkim/key.table:
    marcos-debian.anarcat.user debian.org:marcos-debian.anarcat.user:/etc/opendkim/keys/marcos-debian.anarcat.user.private
    
    Yes, that's quite a mouthful! That magic selector is long in that way because it needs a special syntax (specifically the .anarcat.user suffix) for Debian to be happy. The -debian string is to tell me where the key is published. The marcos prefix is to remind me where the private is used.
  3. generate the key with:
    opendkim-genkey --directory=/etc/opendkim/keys/ --selector=marcos-debian.anarcat.user --domain=debian.org --verbose
    
    This creates the DNS record in /etc/opendkim/keys/marcos-debian.anarcat.user.txt (alongside the private key in .key).
  4. restart OpenDKIM:
    service opendkim restart
    
    The DNS record will look something like this:
    marcos-debian.anarcat.user._domainkey   IN  TXT ( "v=DKIM1; h=sha256; k=rsa; "
    "p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtKzBK2f8vg5yV307WAOatOhypQt3ANQ95iDaewkVehmx42lZ6b4PzA1k5DkIarxjkk+7m6oSpx5H3egrUSLMirUiMGsIb5XVGBPFmKZhDVmC7F5G1SV7SRqqKZYrXTufRRSne1eEtA31xpMP0B32f6v6lkoIZwS07yQ7DDbwA9MHfyb6MkgAvDwNJ45H4cOcdlCt0AnTSVndcl"
    "pci5/2o/oKD05J9hxFTtlEblrhDXWRQR7pmthN8qg4WaNI4WszbB3Or4eBCxhUdvAt2NF9c9eYLQGf0jfRsbOcjSfeus0e2fpsKW7JMvFzX8+O5pWfSpRpdPatOt80yy0eqpm1uQIDAQAB" )  ; ----- DKIM key marcos-debian.anarcat.user for debian.org
    
  5. The "p=MIIB..." string needs to be joined together, without the quotes and the p=, and sent in a signed email to changes@db.debian.org:
    -----BEGIN PGP SIGNED MESSAGE-----
    dkimPubKey: marcos.anarcat.user MIIB[...]
    -----BEGIN PGP SIGNATURE-----
    [...]
    
  6. Wait a few minutes for DNS to propagate. You can check if they have with:
    host -t TXT marcos-debian.anarcat.user._domainkey.debian.org nsp.dnsnode.net
    
    (nsp.dnsnode.net being one of the NS records of the debian.org zone.)
If all goes well, the tests should pass when sending from your server as anarcat@debian.org.

Testing Test messages can be sent to dkimvalidator, mail-tester.com or check-auth@verifier.port25.com. Those tools will run Spamassassin on the received emails and report the results. What you are looking for is:
  • -0.1 DKIM_VALID: Message has at least one valid DKIM or DK signature
  • -0.1 DKIM_VALID_AU: Message has a valid DKIM or DK signature from author's domain
  • -0.1 DKIM_VALID_EF: Message has a valid DKIM or DK signature from envelope-from domain
If one of those is missing, then you are doing something wrong and your "spamminess" score will be worse. The latter is especially tricky as it validates the "Envelope From", which is the MAIL FROM: header as sent by the originating MTA, which you see as from=<> in the postfix lost. The following will happen anyways, as soon as you have a signature, that's normal:
  • 0.1 DKIM_SIGNED: Message has a DKIM or DK signature, not necessarily valid
And this might happen if you have a ADSP record but do not correctly sign the message with a domain field that matches the record:
  • 1.1 DKIM_ADSP_ALL No valid author signature, domain signs all mail
That's bad and will affect your spam core badly. I fixed that issue by using a wildcard key in the key table:
--- a/opendkim/key.table
+++ b/opendkim/key.table
@@ -1 +1 @@
-marcos anarc.at:marcos:/etc/opendkim/keys/marcos.private
+marcos %:marcos:/etc/opendkim/keys/marcos.private

References This is a copy of a subset of my more complete email configuration.

14 April 2020

Dirk Eddelbuettel: RcppArmadillo 0.9.860.2.0

armadillo image Armadillo is a powerful and expressive C++ template library for linear algebra aiming towards a good balance between speed and ease of use with a syntax deliberately close to a Matlab. RcppArmadillo integrates this library with the R environment and language and is widely used by (currently) 706 other packages on CRAN. A new upstream release 9.860.2 of Armadillo was just released. The theme of convergence continues; the previous release increased the minor from 800 to 850, now we are at 860. We first wrapped this up as version 0.9.859.1.0, but it turned out to have been held back by a buglet between R 4.0.0 and Rcpp which the recent patch release fixed (along with other woes on old R or non-CRAN-alike macOS). It then turns out that the new (upstream) version 9.860.1 had a minor bug which I missed as I reverse-depends checked the prior version. Doh. My thanks, as always, to CRAN for spotting this. The fix was added upstream and we have 9.860.2 as RcppArmadillo 0.9.860.2.0. Changes in the new release are noted below.

Changes in RcppArmadillo version 0.9.860.2.0 (2020-04-13)
  • Upgraded to Armadillo release 9.860.2 (Roasted Mocha Fix)
    • Added powmat()
    • Faster access to columns in sparse submatrix views
    • Faster handling of relational expressions by accu()
    • Faster handling of sympd matrices by expmat(), logmat(), sqrtmat()
    • Workaround for save/load issues with HDF5 v1.12
  • Vignettes are now pre-made and include (#285)
  • Two test files are now skipped on 32-bit Windows

Courtesy of CRANberries, there is a diffstat report relative to previous release. More detailed information is on the RcppArmadillo page. Questions, comments etc should go to the rcpp-devel mailing list off the R-Forge page. If you like this or other open-source work I do, you can now sponsor me at GitHub. For the first year, GitHub will match your contributions.

This post by Dirk Eddelbuettel originated on his Thinking inside the box blog. Please report excessive re-aggregation in third-party for-profit settings.

13 April 2020

Giovanni Mascellani: DKIM for Debian Developers

What is DKIM? DKIM (DomainKeys Identified Mail), as Wikipedia puts it, "is an email authentication method designed to detect forged sender addresses in emails (email spoofing), a technique often used in phishing and email spam". More prosaically, one of the reasons email spam is so abundant is that, given a certain email message, there is no simple way to know for certain who sent it and how reputable they are. So even if people having addresses @debian.org are very nice and well-behaving, any random spammer can easily send emails from whatever@debian.org, and even if you trust people from @debian.org you cannot easily configure your antispam filter to just accept all emails from @debian.org, because spammers would get in too. Since nearly ten years DKIM is there to help you. If you send an email from @debian.org with DKIM, it will have a header like this:
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=debian.org;
    s=vps.gio.user; t=1586779391;
    bh=B6tckJy2cynGjNRdm3lhFDrp0tD7fF8hS4x0FCfLADo=;
    h=From:Subject:To:Date:From;
    b=H4EDlATxVm7XNqPy2x7IqCchBUz1SxFtUSstB23BAsdyTKJIohM0O4RRWhrQX+pqE
     prPVhzcfNALMwlfExNE69940Q6pMCuYsoxNQjU7Jl/UX1q6PGqdVSO+mKv/aEI+N49
     vvYNgPJNLaAFnYqbWCPI8mNskLHLe2VFYjSjE4GJFOxl9o2Gpe9f5035FYPJ/hnqBF
     XPnZq7Osd9UtBrBq8agEooTCZHbNFSyiXdS0qp1ts7HAo/rfrBfbQSk39fOOQ5GbjV
     6FehkN4GAXFNoFnjfmjrVDJC6hvA8m0tJHbmZrNQS0ljG/SyffW4OTlzFzu4jOmDNi
     UHLnEgT07eucw==
The field d=debian.org is the domain this email claims to be from and the fields bh= and b= are a cryptographic public key signature certifying this fact. How do I check that the email is actually from @debian.org? I use the selector s=vps.gio.user to fetch the public key via DNS, and then use the public key to verify the signature.
$ host -t TXT vps.gio.user._domainkey.debian.org
vps.gio.user._domainkey.debian.org descriptive text "v=DKIM1; k=rsa; s=email; h=sha256; p=" "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM/W/kxtKWT58Eak0cfm/ntvurfbkkvugrG2jfvSMnHHkFyfJ34Xvn/HhQPLwX1QsjhuLV+tW+BQtxY7jxSABCee6nHQRBrpDej1t86ubw3CSrxcg1mzJI5BbL8un0cwYoBtUvhCYAZKarv1W2otCGs43L0s" "GtEqqtmYN/hIVVm4FcqeYS1cYrZxDsjPzCEocpYBhqHh1MTeUEddVmPHKZswzvllaWF0mgIXrfDNAE0LiX39aFKWtgvflrYFKiL4hCDnBcP2Mr71TVblfDY0wEdAEbGEJqHR1SxvWyn0UU1ZL4vTcylB/KJuV2gMhznOjbnQ6cjAhr2JYpweTYzz3wIDAQAB"
There it is! Debian declares in its DNS record that that key is authorized to sign outbound email from @debian.org. The spammer hopefully does not have access to Debian's DKIM keys, and they cannot sign emails. Many large and small email services have already deployed DKIM since years, while most @debian.org emails still do not use it. Why not? Because people send @debian.org emails from many different servers. Basically, every DD used their @debian.org address sends email from their own mail server, and those mail servers (fortunately) do not have access to Debian's DNS record to install their DKIM keys. Well, that was true until yesterday! :-) A few weeks ago I poked DSA asking to allow any Debian Developer to install their DKIM keys, so that DDs could use DKIM to sign their emails and hopefully reduce the amount of spam sent from @debian.org. They have done it (thank you DSA very much, especially adsb), and now it is possible to use it! How do I configure it? I will not write here a full DKIM tutorial, there are many around. You have to use opendkim-genkey to generate a key and then configure your mail server to use opendkim to digitally sign outbound email. There are a few Debian-specific things you have to care about, though. First the have to choose a selector, which is a string used to distinguish many DKIM keys belonging to the same domain. Debian allows you to installa a key whose selector is <something>.<uid>.user, where <uid> is your Debian uid (this is done both for namespacing reasons and for exposing who might be abusing the system). So check carefully that your selector has this form. Then you cannot edit directly Debian's DNS record. But you can use the email-LDAP gateway on db.debian.org to install your key in a way similar to how entries in debian.net are handled (see the updated documentation). Specifically, suppose that opendkim-genkey generated the following thing for selector vps.gio.user and domain debian.org:
vps.gio.user._domainkey IN  TXT ( "v=DKIM1; h=sha256; k=rsa; "
      "p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM/W/kxtKWT58Eak0cfm/ntvurfbkkvugrG2jfvSMnHHkFyfJ34Xvn/HhQPLwX1QsjhuLV+tW+BQtxY7jxSABCee6nHQRBrpDej1t86ubw3CSrxcg1mzJI5BbL8un0cwYoBtUvhCYAZKarv1W2otCGs43L0sGtEqqtmYN/hIVVm4FcqeYS1cYrZxDsjPzCEocpYBhqHh1MTeUE"
      "ddVmPHKZswzvllaWF0mgIXrfDNAE0LiX39aFKWtgvflrYFKiL4hCDnBcP2Mr71TVblfDY0wEdAEbGEJqHR1SxvWyn0UU1ZL4vTcylB/KJuV2gMhznOjbnQ6cjAhr2JYpweTYzz3wIDAQAB" )  ; ----- DKIM key vps.gio.user for debian.org
Then you have to carefully copy the content of the p= field (without being fooled by it being split between different strings) and construct a request of the form:
dkimPubKey: vps.gio.user MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsM/W/kxtKWT58Eak0cfm/ntvurfbkkvugrG2jfvSMnHHkFyfJ34Xvn/HhQPLwX1QsjhuLV+tW+BQtxY7jxSABCee6nHQRBrpDej1t86ubw3CSrxcg1mzJI5BbL8un0cwYoBtUvhCYAZKarv1W2otCGs43L0sGtEqqtmYN/hIVVm4FcqeYS1cYrZxDsjPzCEocpYBhqHh1MTeUEddVmPHKZswzvllaWF0mgIXrfDNAE0LiX39aFKWtgvflrYFKiL4hCDnBcP2Mr71TVblfDY0wEdAEbGEJqHR1SxvWyn0UU1ZL4vTcylB/KJuV2gMhznOjbnQ6cjAhr2JYpweTYzz3wIDAQAB
and then send it GPG-signed to changes@db.debian.org:
echo 'dkimPubKey: vps.gio.user blahblahblah'   gpg --clearsign   mail changes@db.debian.org
Then use host -t TXT vps.gio.user._domainkey.debian.org to chech the key gets published (it will probably take some minutes/hours, I don't know). Once it is published, you can enable DKIM in you mail server and your email will be signed. Congratulations, you will not look like a spammer any more! You can send an email to check-auth@verifier.port25.com to check that your setup is correct. They will reply with a report, including the success of DKIM test. Notice that currently Debian's setup only allows you to use RSA DKIM keys and doesn't allow you to set other DKIM fields (but you probably won't need to set them). EDIT DSA made an official announcement about DKIM support, which you might want to check out as well, together with its links. EDIT 2 Now ed25519 keys are supported, the syntax for specifying keys on LDAP is a little bit more flexible and you can also insert CNAME records. See the official documentation for the updated details. So we have solved our problems with spam? Ha, no! DKIM is only a small step. Useful, also because it enable other steps to be taken in the future, but small. In particular, DKIM enables you to say: "This particular email actually comes from @debian.org", but doesn't tell anybody what to do with emails that are not signed. A third-party mail server might wonder whether @debian.org emails are actually supposed to be signed or not. There is another standard for dealing with that, which is called DMARD, and I believe that Debian should eventually use it, but not now: the problem is that currently virtually no email from @debian.org is signed with DKIM, so if DMARC was enabled other mail servers would start to nuke all @debian.org emails, except those which are already signed, a minority. If people and services sending emails from @debian.org will start configuring DKIM on their servers, which is now possible, it will eventually come a time when DMARC can be enabled, and spammers will find themselves unable to send forged @debian.org emails. We are not there yet, but todays we are a little step closer than yesterday. Also, notice that having DKIM on @debian.org only counters spam pretending to be from @debian.org, but there is much more. The policy on what to accept is mostly independent on that on what you send. However, knowing that @debian.org emails have DKIM and DMARC would mean that we can set our spam filters to be more aggressive in general, but whitelist official Debian Developers and services. And the same can be done for other domains using DKIM and DMARC. Finally, notice that some incompatibilities between DKIM and mailing lists are known, and do not have a definitive answer yet. Basically, most mailing list engines modify either the body of the headers in forwarded emails, which means that DKIM does not validate any more. There are many proposed solutions, possibly none completely satisfying, but since spam is not very satisfying as well, something will have to be worked out. I wrote a lot already, though, so I wont't discuss this here.

Shirish Agarwal: Migrant worker woes and many other stories

I was gonna use this blog post to share about the migrant worker woes as there has been multiple stories doing the rounds. For e.g. a story which caught the idea of few people but most of us, i.e. middle-class people are so much into our own thing that we care a fig leaf about what happens to migrants. This should not be a story coming from a humane society but it seems India is no different than any other country of the world and in not a good way. Allow me to share
Or for those who don t like youtube, here s an alternative link https://www.invidio.us/watch?v=JGEgZq_1jmc Now the above two editorial shares two stories, one of Trump retaliatory threat to India in the Q&A of the journalist. In fact, Trump has upped the ante on visa sanctions as India buckled so easily under pressure. There have been other stories doing the rounds how people who have illnesses who need HCQ in India are either dying or are close to death because of unavailability of HCQ in the medicine shop. There have been reports in Pune as well as South Mumbai (one of the poshest localities in Mumbai/Bombay) that medicine shops are running empty or emptier. There have been so many stories on that, with reporters going to shops and asking owners of the medicine shops and shop-owners being clueless. I think the best article which vividly describes the Government of India (GOI) response to the pandemic is the free-to-read article shared by Arundhati Roy in Financial Times. It has reduced so much of my work or sharing that it s unbelievable. And she has shared it with pictures and all so I can share other aspects of how the pandemic has been affecting India and bringing the worst out in the Government in its our of need. In fact, not surprisingly though, apparently there was also a pro-Israel similar thing which happened in Africa too . As India has too few friends now globally, hence it decided to give a free pass to them.

Government of India, news agencies and paid News One of the attempts the state tried to do, although very late IMHO is that it tried to reach out to the opposition i.e. Congress party and the others. Mrs. Sonia Gandhi, who is the Congress president asked that the Government should not run any of its ads on private television channels for a period of two years. There had been plenty of articles, both by medianama and others who have alleged that at least from the last 6 odd years, Government ads. comprise of almost 50-60% advertising budget of a channel advertising budget. This has been discussed also in medianama s roundtable on online content which happened few months back. While an edited version is out there on YT, this was full two day s event which happened across two different cities.
or the alternative to youtube https://www.invidio.us/watch?v=c1PhWR1-Urs It was as if the roundtable discussions were not enough, Mrs. Gandhi clarion call was answered by News Broadcaster s Association (NBA) and this is what they had to say
News Broadcasters Association reply to Mrs. Gandhi
To put it simply, NBA deplored the suggestion by Mrs. Gandhi and even called the economy in recession and all they had were the Government s own advertising budget to justify their existence. The statements in themselves are highly pregnant and reveal both the relationship that the media, print or mainstream news channels have with the Government of India. Now if you see that, doesn t it make sense that media always slants the story from the Government s perspective rather than remaining neutral. If my bread basket were on the onus of me siding with the Govt. that is what most sane persons would do, otherwise they would resign and leave which many reporters who had a conscience did. Interestingly enough, the NBA statement didn t just end there but also used the word recession , this is the term that Government of India (GOI) hates and has in turn has been maintaining the word, terminology slowdown . While from a layman s perspective the two terms may seem to be similar, if India has indeed been in recession then the tools and the decisions that should have been taken by GOI should have been much different than what they took. Interestingly, enough GOI has refrained from saying anything on the matter which only reveals their own interests in the matter. Also if an association head is making the statement, it is more than likely that he consulted a lawyer or two and used application of mind while drafting the response. In other words, or put more simply, this was a very carefully drafted letter because they know that tomorrow the opposition party may come into power so they don t want to upset the power dynamics too much.

Privacy issues arising due to the Pandemic On the same Financial Times, two stories which dealt with the possible privacy violations due to the Pandemic have been doing the rounds. The first one, by Yuval Noah Harari is more exploratory by nature and makes some very good points without going far too deep into specific instances of recent times but rather goes into history and past instances where Governments have used the pandemics to exert more control over their populace and drive their agenda. I especially liked the last few lines which he shared in his op-ed Even if the current administration eventually changes tack and comes up with a global plan of action, few would follow a leader who never takes responsibility, who never admits mistakes, and who routinely takes all the credit for himself while leaving all the blame to others. Yuval Noah Harari . The whole statement could right fit onto the American President which he was talking about while at the same time, fits right into the current Indian Prime Minister, Boris Johnson of UK and perhaps Jair Bolsanaro of Brazil. All these three-four individuals have in common is that most of them belong to right-wing and hence cater only to the rich industrialist s agenda. While I don t know about Jair Bolsanaro much, at least three out of four had to turn to socialism and had to give some bailout packages to the public at large, even though continuing to undermine their own actions. More on this probably a bit down the line. The second story shared by Nic Fildes and Javier Espinoza who broke the story of various surveillance attempts and the privacy concerns that people have. Even the Indian PMO has asked this data and because there was no protest by the civil society, a token protest was done by COAI (Cellular Operator Association of India) but beyond that nothing, I am guessing because the civil society didn t make much noise as everybody is busy with their own concerns of safety and things going on, it s possible that such data may have gone to the Government. There is not much new here that people who had been working on the privacy issues know, it s just how easy Governments are finding to do it. The part of informed consent is really a misnomer . Governments lie all the time, for e.g. in the UK, did the leave party and people take informed consent, no they pushed their own agenda. This is and will be similar in many countries of the world.

False Socialism by RW parties In at least the three countries I have observing, simply due to available time, that lot of false promises are being made by our leaders and more often than not, the bailouts will be given to already rich industrialists. An op-ed by Vivek Kaul, who initially went by his handle which means somebody who is educated but unemployed. While Vivek has been one-man army in revealing most of the Government s mischiefs especially as fudging numbers are concerned among other things, there have been others too. As far as the US is concerned, an e-zine called free press (literally) has been sharing Trump s hollowness and proclamations for U.S. . Far more interestingly, I found New York times investigated and found a cache of e-mails starting from early January, which they are calling Red Dawn . The cache is undeniable proof that medical personnel in the U.S. were very much concerned since January 2020 but it was only after other countries started lock-down that U.S. had to follow suit. I am sure Indian medical professionals may have done similar mail exchanges but we will never know as the Indian media isn t independent enough.

Domestic violence and Patriarchy There have been numerous reports of domestic violence against women going up, in fact two prominent publications have shared pieces about how domestic violence has gone up in India since the lockdown but the mainstream press is busy with its own tropes, the reasons already stated above. In fact, interestingly enough, most women can t wear loose fitting clothes inside the house because of the near ones being there 24 7 . This was being shared as India is going through summer where heat waves are common and most families do not have access to A/C s and rely on either a fan or just ventilation to help them out. I can t write more about this as simply I m not a woman so I haven t had to face the pressures that they have to every day. Interestingly though, there was a piece shared by arre. Interestingly, also arre whose content I have shared a few times on my blog has gone from light, funny to be much darker and more serious tone. Whether this is due to the times we live in is something that a social scientist or a social anthropologist may look into in the times to come. One of the good things though, there hasn t been any grid failures as no industrial activity is happening (at all). In fact SEB s (State Electricity Boards) has shown a de-growth in electricity uptake as no industrial activity has been taken. While they haven t reduced any prices (which they ideally should have) as everybody is suffering.

Loot and price rise Again, don t think it is an Indian issue but perhaps may be the same globally. Because of broken supply chains, there are both real and artificial shortages happening which is leading to reasonable and unreasonable price hikes in the market. Fresh veggies which were normally between INR 10/- to INR 20/- for 250 gm have reached INR 40/- 50/- and even above. Many of the things that we have to become depend upon are not there anymore. The shortage of plastic bottles being case in point.
Aryan Plastic bottle
This and many others like these pictures have been shared on social media but it seems the Government is busy doing something else. The only thing we know for sure is that the lock-down period is only gonna increase, no word about PPE s (Personal Protection Equipment) or face masks or anything else. While India has ordered some, those orders are being diverted to US or EU. In fact, many doctors who have asked for the same have been arrested, sacked or suspended for asking such inconvenient questions, although whether in BJP ruled states or otherwise. In fact, the Centre has suspended MPLADS funds , members of parliament get funds which they can use to provide relief work or whatever they think the money is best to spend upon.

Conditions of Labor in the Pandemic Another sort of depressing story has been how the Supreme Court CJI Justice SA Bobde has made statements and refrained from playing any role in directing the Center to provide relief to the daily wage laborers. In fact, Mr. Bobde made statements such as why they need salaries if they are getting food. This was shared by barandbench, a site curated by lawyers and reporters alike. Both livelaw as well as barandbench have worked to enhance people s awareness about the legal happenings in our High Courts and Supreme Court. And while sadly, they cannot cover all, they at least do attempt to cover a bit of what s hot atm. The Chief Justice who draws a salary of INR 250,000 per month besides other perks is perhaps unaware or doesn t care about fate of millions of casual workers, 400 460 million workers who will face abject poverty and by extension even if there are 4 members of the family so probably 1.2 billion people will fall below the poverty line. Three, four major sectors are going to be severely impacted, namely Agriculture, Construction and then MSME (Micro, small and medium enterprises) which cover everything from autos, industrial components, FMCG, electronics, you name it, it s done by the MSME sector. We know that the Rabi crop, even though it was gonna be a bumper crop this year will rot away in the fields. Even the Kharif crop whose window for sowing is at the most 2-3 weeks will not be able to get it done in time. In fact, with the extended lockdown of another 21 days, people will probably return home after 2 months by which time they would have nothing to do there as well as here in the cities. Another good report was done by the wire, the mainstream media has already left the station.

Ministry of Public Health There was an article penned by Dr. Edmond Fernandes which he published last year. The low salary along with the complexities that Indian doctors are and may face in the near future are just mind-boggling.

The Loss Losses have already started pouring in. Just today Air Deccan has ceased all its operations. I had loved Mr. Gopinath s airline which was started in the early 2000 s. While I won t bore you with the history, most of it can be seen from simplify Deccan . This I believe is just the start and it s only after the few months after the lock-down has been lifted would we really know the true extent of losses everywhere. And the more lenghthier the lockdown, the more difficult it would be businesses to ramp back. People have already diagnosed at the very least 15-20 sectors of the economy which would be hit and another similar or more number of sectors which will have first and second-order of losses and ramp-downs. While some guesses are being made, many are wildly optimistic and many are wildly pessimistic, as shared we would only know the results when the lockdown is opened up.

Predictions for the future While things are very much in the air, some predictions can be made or rationally deduced. For instance, investments made in automation and IT would remain and perhaps even accelerate a little. Logistics models would need to be re-worked and maybe, just maybe there would be talk and action in making local supply chains a bit more robust. Financing is going to be a huge issue for at least 6 months to a year. Infrastructure projects which require huge amount of cash upfront will either have to be re-worked or delayed, how they will affect projects like Pune Metro and other such projects only time will tell.

Raghuram Rajan Raghuram Rajan was recently asked if he would come back and let bygones be bygones. Raghuram in his own roundabout way said no. He is right now with Chicago Booth doing the work that he always love. Why would he leave that and be right in the middle of the messes other people have made. He probably gets more money, more freedom and probably has a class full of potential future economists. Immigration Control, Conferences and thought experiment There are so many clueless people out there, who don t know why it takes so long for any visa to be processed. From what little I know, it is to verify who you say you are and you have valid reason to enter the country. The people from home ministry verify credentials, as well as probably check with lists of known criminals and their networks world-wide. They probably have programs for such scenarios and are part and parcel of their everyday work. The same applies to immigration control at Airports. there has been a huge gap at immigration counters and the numbers of passengers who were flying internationally to and fro from India. While in India, we call them as Ministry of Home Affairs, in U.S. it s Department of Homeland security, other countries using similar jargons. Now even before this pandemic happened, the number of people who are supposed to do border control and check people was way less and there have been scenes of Air rage especially in Indian airports after people came after a long-distance flight. Now there are couple of thought experiments, just day before yesterday scientists discovered six new coronaviruses in bats and scientists in Iceland found 40 odd mutations of the virus on people. Now are countries going to ban people from Iceland as in time the icelandic people probably would have anti-bodies on all the forty odd mutations. Now if and when they come in contact onto others who have not, what would happen ? And this is not specifically about one space or ethnicity or whatever, microbes and viruses have been longer on earth than we have. In our greed we have made viruses resistant to antibiotics. While Mr. Trump says as he discovered it today, this has been known to the medical fraternity since tht 1950 s. CDC s own chart shows it. We cannot live in fear of a virus, the only way we can beat it is by understanding it and using science. Jon Cohen shared some of the incredible ways science is looking to beat this thing
or as again an alternative to youtube https://www.invidio.us/watch?v=MPVG_n3w_vM One of the most troubling question is how the differently-abled communities which don t have media coverage at the best of times, haven t had any media coverage at all during the pandemic. What are their stories and what they are experiencing ? How are they coping ? Are there anyways we could help each other ? By not having those stories, we perhaps have left them more vulnerable than we intend. And what does that speak about us, as people or as a community or a society ?

Silver Linings While there is not a lot to be positive about, one interesting project I came about is openbreath.tech . This is an idea, venture started by IISER (Indian Institute of Science Education and Research) , IUCAA (Inter-University Centre for Astronomy and Astrophysics). They are collaborating with octogeneraian Capt (Retd) Rustom Barucha from Barucha Instrumentation and Control, besides IndoGenius, New Delhi, and King s College, London. The first two institutes are from my home town, Pune. While I don t know much of the specifics of this idea other than that there is an existing Barucha ventilator which they hope to open-source and make it easier for people to produce their own. While I have more questions than answers at this point, this is something hopefully to watch out for in the coming days and weeks. The other jolly bit of good news has come from Punjab where after several decades, people in Northern Punjab are finally able to see the Himalayas or the Himalayan mountain range.
Dhauladhar range Northern Punjab Copyright CNN.Com
There you have it, What I have covered is barely scratching the surface. As a large section of the media only focuses on one narrative, other stories and narratives are lost. Be safe, till later.

12 April 2020

Enrico Zini: Some inventors links

Cleopatra the Alchemist - Wikipedia
history people archive.org
Cleopatra the Alchemist who likely lived during the 3rd century AD, was a Greek alchemist, author, and philosopher. She experimented with practical alchemy but is also credited as one of the four female alchemists that could produce the Philosopher's stone. Some writers consider her to be the inventor of the alembic, a distillation apparatus.
Hedy Lamarr (/ he di/), born Hedwig Eva Maria Kiesler (November 9, 1914[a] January 19, 2000), was an Austrian-born American film actress and inventor who was posthumously inducted into the National Inventors Hall of Fame.[1]
Radia Joy Perlman (born December 18, 1951) is an American computer programmer and network engineer. She is most famous for her invention of the spanning-tree protocol (STP), which is fundamental to the operation of network bridges, while working for Digital Equipment Corporation. She also made large contributions to many other areas of network design and standardization, such as link-state routing protocols.
Stephanie Louise Kwolek (July 31, 1923 June 18, 2014) was an American chemist who is known for inventing Kevlar. She was of Polish heritage and her career at the DuPont company spanned more than 40 years.[1] She discovered the first of a family of synthetic fibres of exceptional strength and stiffness: poly-paraphenylene terephthalamide.
This page aims to list inventions and discoveries in which women played a major role.

Emmanuel Kasper: Putting a Red Hat on

I am switching jobs, and after a two year stint as a full stack developer at BPMasters, I am joining Red Hat as a Technical Account Manager (Platform and Openshift). A good friend of a good friend already worked at Red Hat, and advised me to apply, which I did, and I am starting in May in Vienna, the place where I live.
I have heard that there is already a number of Debian Developers working for Red Hat, so if you happen to be one of them, I hope we ll get in touch !

10 April 2020

Utkarsh Gupta: Debian Activities for March 2020

Here s my (sixth) monthly update about the activities I ve done in Debian this March.

Debian LTS This was my sixth month as a Debian LTS paid contributor.
I was assigned 24.00 hours and worked on the following things:

CVE Fixes and Announcements:
  • Issued DLA 2131-1, fixing CVE-2014-6262, for rrdtool.
    For Debian 8 Jessie , this problem has been fixed in version 1.4.8-1.2+deb8u1.
  • Issued DLA 2131-2, fixing regression caused by DLA 2131-1, for rrdtool.
    For Debian 8 Jessie , this problem has been fixed in version 1.4.8-1.2+deb8u2.
  • Issued DLA 2135-1, fixing CVE-2020-9546, CVE-2020-9547, and CVE-2020-9548, for jackson-databind.
    For Debian 8 Jessie , these problems have been fixed in version 2.4.2-2+deb8u12.
  • Issued DLA 2137-1, fixing CVE-2020-10232, for sleuthkit.
    For Debian 8 Jessie , this problem has been fixed in version 4.1.3-4+deb8u2.
  • Issued DLA 2139-1, fixing CVE-2020-5258 and CVE-2020-5259, for dojo.
    For Debian 8 Jessie , these problems have been fixed in version 1.10.2+dfsg-1+deb8u3.
  • Issued DLA 2141-1, fixing CVE-2020-10184 and CVE-2020-10185, for yubikey-val.
    For Debian 8 Jessie , these problems have been fixed in version 2.27-1+deb8u1.
  • Issued DLA 2146-1, fixing CVE-2019-15690, for libvncserver.
    For Debian 8 Jessie , this problem has been fixed in version 0.9.9+dfsg2-6.1+deb8u7.
  • Issued DLA 2147-1, fixing CVE-2019-17546, for gdal.
    For Debian 8 Jessie , this problem has been fixed in version 1.10.1+dfsg-8+deb8u2.
  • Issued DLA 2149-1, fixing CVE-2020-5267, for rails.
    For Debian 8 Jessie , this problem has been fixed in version 2:4.1.8-1+deb8u6.
  • Issued DLA 2153-1, fixing CVE-2020-10672 and CVE-2020-10673, for jackson-databind.
    For Debian 8 Jessie , these problems have been fixed in version 2.4.2-2+deb8u13.
  • Issued DLA 2154-1, fixing CVE-2020-10802 and CVE-2020-10803, for phpmyadmin.
    For Debian 8 Jessie , these problems have been fixed in version 4:4.2.12-2+deb8u9.

Other LTS Work:

Debian Work

Uploads to the Archive:
  • micro (2.0.2-1~bpo10+1) to buster-backports.
  • rails (2:5.2.4.1+dfsg-1) to unstable.
  • ruby-rack (2.0.8-1) to unstable.
  • ruby-grape (1.3.0-1) to experimental.
  • libgit2 (0.28.4+dfsg.1-3) to unstable.
  • micro (2.0.2-2) to unstable.
  • ruby-octokit (4.17.0-1) to unstable.
  • ruby-power-assert (1.1.6-1) to unstable.
  • rails (2:5.2.4.1+dfsg-2) to unstable.
  • ruby-octokit (4.17.0-2) to unstable.
  • ruby-method-source (1.0.0-1) to unstable.
  • libwebservice-ils-perl (0.18-1) to unstable.
  • libdata-hal-perl (1.001-1) to unstable.
  • rails (2:4.2.7.1-1+deb9u2) to stretch.
  • rails (2:5.2.2.1+dfsg-1+deb10u1) to buster.
  • libgit2 (0.28.4+dfsg.1-4) to unstable.
  • ruby-grape (1.3.1+git20200320.c8fd21b-1) to experimental.
  • ruby-grape-logging (1.8.3-1) to unstable.
  • ruby-grape (1.3.1+git20200320.c8fd21b-2) to unstable.
  • ruby-dry-equalizer (0.3.0-2) to unstable.
  • ruby-dry-core (0.4.9-2) to unstable.
  • ruby-dry-logic (1.0.5-2) to unstable.
  • ruby-dry-inflector (0.2.0-2) to unstable.
  • ruby-dry-container (0.7.2-2) to unstable.
  • ruby-dry-configurable (0.9.0-2) to unstable.
  • ruby-dry-types (1.2.2-2) to unstable.
  • micro (2.0.2-2~bpo10+1) to buster-backports.
  • golang-vbom-util (0.0~git20180919.efcd4e0-2) to unstable.
  • golang-github-tonistiigi-units (0.0~git20180711.6950e57-2) to unstable.
  • golang-github-jaguilar-vt100 (0.0~git20150826.2703a27-2) to unstable.
  • golang-github-grpc-ecosystem-grpc-opentracing (0.0~git20180507.8e809c8-2) to unstable.
  • rails (2:6.0.2.1+dfsg-3) to experimental.
  • libgit2 (0.99.0+dfsg.1-1) to experimental.
  • golang-github-goji-param (0.0~git20160927.d7f49fd-5) to unstable.
  • phpmyadmin-sql-parser (4.6.1-2) to unstable.
  • mariadb-mysql-kbs (1.2.10-2) to unstable.
  • golang-github-aleksi-pointer (1.1.0-1) to unstable.
  • golang-github-andreyvit-diff (0.0~git20170406.c7f18ee-2) to unstable.
  • golang-github-audriusbutkevicius-go-nat-pmp (0.0~git20160522.452c976-2) to unstable.
  • ruby-power-assert (1.1.7-1) to unstable.
  • ruby-test-unit (3.3.5-1) to unstable.
  • ruby-omniauth (1.9.1-1) to unstable.
  • ruby-warden (1.2.8-1) to unstable.
  • python-libais (0.17+git.20190917.master.e464cf8-2) to unstable.
  • lolcat (100.0.1-3) to unstable.
  • ruby-vips (2.0.17-1) to unstable.

Bug Fixes:
  • #836206 for lolcat.
  • #940338 for golang-github-audriusbutkevicius-go-nat-pmp.
  • #940335 for golang-github-andreyvit-diff.
  • #940334 for golang-github-aleksi-pointer.
  • #940362 for golang-github-goji-param.
  • #952025 for ruby-grape.
  • #867027 for ruby-grape.
  • #954529 for libgit2.
  • #954304 for rails (CVE-2020-5267) buster-pu.
  • #954304 for rails (CVE-2020-5267) stretch-pu.
  • #954304 for rails (CVE-2020-5267) unstable.
  • #953400 for micro.
  • #927889 for libgit2.
  • #952111 for micro.

Miscellaneous:
  • Sponsored a lot of uploads :)
  • Outreachy mentoring for GitLab project for Sakshi Sangwan.
  • Opened PRs & MRs upstream.

Until next time.
:wq for today.

9 April 2020

Antoine Beaupr : Mumble dreams

With everyone switching to remote tools for social distancing, I've been using Mumble more and more. That's partly by choice -- I don't like videoconferencing much, frankly -- and partly by necessity: sometimes my web browser fails and Mumble is generally more reliable. Some friend on a mailing list recently asked "shouldn't we make Mumble better?" and opened the door for me to go on a long "can I get a pony?" email. Because I doubt anyone on that mailing list has the time or capacity to actually fix those issues, I figured I would copy this to a broader audience in the hope that someone else would pick it up.

Why Mumble rocks Before I go on with the UI critique, I should show why care: Mumble is awesome. When you do manage to configure it correctly, Mumble just works; it's highly reliable. It uses little CPU, both on the client and the server side, and can have rooms with tens if not hundreds of participants. The server can be easily installed and configured: there's a Debian package and resource requirements are minimal. It's basically network-bound. There are at least three server implementations, the official one called Murmur, the minimalist umurmur and Grumble, a Go rewrite. It has great quality: echo canceling, when correctly configured, is solid and latency is minimal. It has "overlays" so you can use it while gaming or demo'ing in full screen while still having an idea of who's talking. It also supports positional audio for gaming that integrates with popular games like Counterstrike or Half-Life. It's moderately secure: it doesn't support end-to-end encryption, but client/server communication is encrypted with TLS. It supports a server password and some moderation mechanisms.

UI improvements Mumble should be smarter about a bunch of things. Having all those settings is nice for geeky control freaks, but it makes the configuration absolutely unusable for most people. Hide most settings by default, and make better defaults. Specifically, those should be on by default:
  • RNNoise
  • echo cancellation (the proper "monitor" channels)
  • pre-configured shortcut for PTT (Push To Talk) -- right-shift is my favorite
  • "double-PTT" to hold it enabled
  • be more silent by default (I understand why it would want to do voice synthesis, but it would need to be much better at it before it's default)
The echo test should be more accessible, one or two clicks away from the main UI. I have only found out about that feature when someone told me where to find it. This basically means to take it out of the settings page and into its own dialog. The basic UI should be much simpler. It could look something like Jitsi: just one giant mute button with a list of speakers. Basically:
  1. Take that status bar and make it use the entire space of the main window
  2. Push the chat and room list dialog to separate, optional dialog (e.g. the room list could be a popup on login, but we don't need to continuously see the damn thing)
  3. Show the name of the person talking in the main UI, along with other speakers (Big Blue Button does this well: just a label that fades away with time after a person talks)
Some features could be better explained. For example, the "overlay" feature makes no sense at all for most users. It only makes sense when you're a gamer and use Mumble alongside another full-screen program, to show you who's talking. Improved authentication. The current authentication systems in Mumble are somewhat limited: the server can have a shared password to get access to it, and from there it's pretty much free-for-all. There are client certificates but those are hard to understand and the most common usage scenario is that someone manages to configure it once, forgets about it and then cannot login again with the same username. It should be easier to get the audio right. Now, to be fair, this is hard to do in any setup, and Mumble is only a part of this. There are way too many moving parts in Linux for this to be easy: between your hardware, ALSA drivers, Pulseaudio mixers and Mumble, too many things can go wrong. So this is a general problem when doing multimedia in general, and the Linux ecosystem in particular, but Mumble is especially hard to configure in there. Improved speaker stats. When you right-click on a user in Mumble, you get detailed stats about the user: packet loss, latency, bandwidth, codecs... It's pretty neat. But that is hard to parse for a user. Jitsi, in contrast, shows a neat little "bar graph" (similar to what you get on a cell phone) with a color code to show network conditions for that user. Then you can drill down to show more information. Having that info for the user would be really useful to figure out which user is causing that echo or latency. Heck, while I'm dreaming, we could do the same thing Jitsi and tell the user when we detect too much noise on their side and suggest muting! There's probably more UI issues, but at that point you have basically rebuilt the entire user interface. This problem is hard to fix because UX people are unlikely to have the skills required to hack at an (old) Qt app, and C++ hackers are unlikely to have the best UX skills...

Missing features Video. It has been on the roadmap since 2011, so I'm not holding my breath. It is, obviously, the key feature missing from the software when compared to other conferencing tools and it's nice to see they are considering it. Screensharing and whiteboarding would also be a nice addition. Unfortunately, all that is a huge undertaking and it's unlikely to happen in the short term. And even if it does, it's possible hard-core Mumble users would be really upset at the change... A good web app -- a major blocker to the adoption of Mumble is the need for that complex app. If users could join just with a web browser, adoption would be much easier. There is a web app called mumble-web out there, but it seems to work only for listening as there are numerous problems with recording: quality issues, audio glitches, voice activation, voice activation.. The CCC seems to be using that app to stream talk translation, so that part supposedly works correctly. Dial-in -- allow plain old telephones to call into conferences. There seems to be a program called mumsi that can do this, but it's unmaintained and it's unclear if any of the forks work at all. Update: according to samba, mumsi works, but sometimes freezes and needs to be restarted. Each SIP account shows up as a bot that comes up when someone calls the number. It supports multiple callers, although apparently mumsi crashes after a while with 4 callers. A comment here also mentioned there's a fork that mentions using a "pin" as well for dialing in.

Caveats Now the above will probably not happen soon. Unfortunately, Mumble has had trouble with their release process recently. It took them a long time to even agree on releasing 1.3, and when they did agree, it took them a long time again to actually do the release. There has been much more activity on the Mumble client and web app recently, so hopefully I will be proven wrong. The 1.3.1 release actually came out recently(correction:) is actually being worked on, which is encouraging. All in all, mumble has some deeply ingrained UI limitations. it's built like an app from the 1990, all the way down to the menu system and "status bar" buttons. It's definitely not intuitive for a new user and while there's an audio wizard that can help you get started, it doesn't always work and can be confusing in itself. I understand that I'm just this guy saying "please make this for me ktxbye". I'm not writing this as a critic of Mumble: I love the little guy, the underdog. Mumble has been around forever and it kicks ass. I'm writing this in a spirit of solidarity, in the hope the feedback can be useful and to provide useful guidelines on how things could be improved. I wish I had the time to do this myself and actually help the project beyond just writing, but unfortunately the reality is I'm a poor UI designer and I have little time to contribute to more software projects. So hopefully someone could take those ideas and make Mumble even greater. And if not, we'll just have to live with it. Thanks to all the Mumble developers who, over all those years, managed to make and maintain such an awesome product. You rock!

Update: a chat with Mumble folks Update: it seems the idea of simplifying the Mumble interface will take some time to sink in. After presenting this article in the #mumble Freenode IRC channel, it became obvious that having a more usable interface is not a priority. To put it in the words of a participant in the channel:
If someone is too stupid to use a piece of software than they should probably use something else or have someone capable of critical thinking set it up for them. -- meep
So I guess "I'm with stupid": I do not believe we should make software only for "smart" people because that leads to overly complicated and over-engineered user interfaces that are needlessly hard to use and configure. Mumble is actually an excellent example of such programs: powerful software, but too hard to use to actually reach critical mass. Thankfully, meep is not a Mumble developer and does not actually represent the official position of the Mumble project. A core developer (not representing the project either) was more nuanced:
The UI being not up to date is a matter of taste. The kind of UI you are describing is the kind of UI I certainly don't want. More gernally though I agree that the UI needs some rework and especially: Flexibility so that each user can (ideally) make it appear as (s)he wants. Before this can happen though, we'll have to rewrite a fair bit of code as we'll have to separate backend and frontend from one another. -- krzmbrzl
So this will take time. The fact that Qt seems to be moving back to closed-source does not help the situation with Mumble's GUI development, unfortunately. But the other hand, maybe it will provide the necessary "kick" to write a new, simpler GUI.

7 April 2020

Shirish Agarwal: GMRT 2020 and lots of stories

First of all, congratulations to all those who got us 2022 Debconf, so we will finally have a debconf in India. There is of course, lot of work to be done between now and then. For those who would be looking forward to visit India and especially Kochi I would suggest you to hear this enriching tale
I am sorry I used youtube link but it is too good a podcast not to be shared. Those who don t want youtube can use the invidio.us link for the same as shared below. https://www.invidio.us/watch?v=BvjgKuKmnQ4 I am sure there are lot more details, questions, answers etc. but would direct them gently to Praveen, Shruti, Balasankar and the rest who are from Kochi to answer if you have any questions about that history.

National Science Day, GMRT 2020 First, as always, we are and were grateful to both NCRA as well as GMRT for taking such good care of us. Even though Akshat was not around, probably getting engaged, a few of us were there. About 6-7 from the Mozilla Nasik while the rest representing the foss community. Here is a small picture which commentrates the event
National Science Day, GMRT 2020
While there is and was a lot to share about the event. For e.g. Akshay had bought RPI- Zero as well as RPI-2 (Raspberry Pi s ) and showed some things. He had also bought up a Debian stable live drive with persistence although the glare from the sun was too much that we couldn t show it to clearly to students. This was also the case with RPI but still we shared what and how much we could. Maybe next year, we either ask them to have double screens or give us dark room so we can showcase things much better. We did try playing with contrast and all but it didn t have much of an effect  . Of course in another stall few students had used RPI s as part of their projects so at times we did tell some of the newbies to go to those stalls and see and ask about those projects so they would have a much wider experience of things. The Mozilla people were pushing VR as well as Mozilla lite the browser for the mobile. We also gossiped quite a bit. I shared about indicatelts , a third-party certificate extension although I dunno if I should file a wnpp about it or not. We didn t have a good experience of when I had put an RFP (Request for Package) which was accepted for an extension which had similar functionality which we later come to know was sharing the sites people were using the extension to call home and share both the URL and the IP Address they were using it from. Sadly, didn t leave a good taste in mouth

Delhi Riots One thing I have been disappointed with is the lack of general awareness about things especially in the youth. We have people who didn t know that for e.g. in the Delhi riots which happened recently the law and order (Police) lies with Home Minister of India, Amit Shah. This is perhaps the only capital in the world which has its own Chief Minister but doesn t have any say on its law and order. And this has been the case for last 70 years i.e. since independance. The closest I know so far is the UK but they too changed their tune in 2012. India and especially Delhi seems to be in a time-capsule which while being dysfunctional somehow is made to work. In many ways, it s three body or a body split into three personalities which often makes governance a messy issue but that probably is a topic for another day. In fact, scroll had written a beautiful editorial that full statehood for Delhi was not only Arvind Kejriwal s call (AAP) but also something that both BJP as well as Congress had asked in the past. In fact, nothing about the policing is in AAP s power. All salaries, postings, transfers of police personnel everything is done by the Home Ministry, so if any blame has to be given it has to be given to the Home Ministry for the same.

American Capitalism and Ventilators America had been having a history of high cost healthcare as can be seen in this edition of USA today from 2017 . The Affordable Care Act was signed as a law by President Obama in 2010 which Mr. Trump curtailed when he came into power couple of years back. An estimated 80,000 people died due to seasonal flu in 2018-19 . Similarly, anywhere between 24-63,000 have supposed to have died from Last October to February-March this year. Now if the richest country can t take care of their population which is 1/3rd of the population of this country while at the same time United States has thrice the area that India has. This I am sharing as seasonal flu also strikes the elderly as well as young children more than adults. So in one senses, the vulnerable groups overlap although from some of the recent stats, for Covid-19 even those who are 20+ are also vulnerable but that s another story altogether. If you see the CDC graph of the seasonal flu it is clear that American health experts knew about it. One another common factor which joins both the seasonal flu and covid is both need ventilators for the most serious cases. So, in 2007 it was decided that the number of ventilators needed to be ramped up, they had approximately 62k ventilators at that point in time all over U.S. The U.S. in 2010, asked for bids and got bid from a small californian company called Newport Medic Instruments. The price of the ventilators was approximately INR 700000 at 2010 prices, while Newport said they would be able to mass-produce at INR 200000 at 2010 prices. The company got the order and they started designing the model which needed to be certified by FDA. By 2011, they got the product ready when a big company called Covidgen bought Newport Medic and shutdown the project. This was shared in a press release in 2012. The whole story was broken by New York Times again, just a few days ago which highlighted how America s capitalism rough shod over public health and put people s life unnecessarily in jeopardy. If those new-age ventilators would have been a reality then not just U.S. but India and many other countries would have bought the ventilators as every county has same/similar needs but are unable to pay the high cost which in many cases would be passed on to their citizens either as price of service, or by raising taxes or a mixture of both with public being none the wiser. Due to dearth of ventilators and specialized people to operate it and space, there is possibility that many countries including India may have to make tough choices like Italian doctors had to make as to who to give ventilator to and have the mental and emotional guilt which would be associated with the choices made.

Some science coverage about diseases in wire and other publications Since Covid coverage broke out, the wire has been bringing various reports of India s handling of various epidemics, mysteries, some solved, some still remaining unsolved due to lack of interest or funding or both. The Nipah virus has been amply discussed in the movie Virus (2019) which I shared in the last blog post and how easily it could have been similar to Italy in Kerala. Thankfully, only 24 people including a nurse succumbed to that outbreak as shared in the movie. I had shared about Kerala nurses professionalism when I was in hospital couple of years back. It s no wonder that their understanding of hygeine and nursing procedures are a cut above the rest hence they are sought after not just in India but world-over including US and UK and the middle-east. Another study on respitory illness was bought to my attention by my friend Pavithran.

Possibility of extended lockdown in India There was talk in the media of extended lockdown or better put an environment is being created so that an extended lockdown can be done. This is probably in part due to a mathematical model and its derivatives shared by two Indian-origin Cambridge scholars who predict that a minimum 49 days lockdown may be necessary to flatten the covid curve about a week back.
Predictions of the outcome of the current 21-day lockdown (Source: Rajesh Singh, R. Adhikari, Cambridge University)
Alternative lockdown strategies suggested by the Cambridge model (Source: Rajesh Singh, R. Adhikari, Cambridge University)
India caving to US pressure on Hydroxychloroquine While there has been lot of speculation in U.S. about Hydroxychloroquine as the wonder cure, last night Mr. Trump threatened India in a response to a reporter that Mr. Modi has to say no for Hydroxychloroquine and there may be retaliations.
As shared before if youtube is not your cup you can see the same on invidio.us https://www.invidio.us/watch?v=YP-ewgoJPLw Now while there have been several instances in the past of U.S. trying to bully India, going all the way back to 1954. In fact, in recent memory, there were sanctions on India by US under Atal Bihari Vajpayee Government (BJP) 1998 but he didn t buckle under the pressure and now we see our current PM taking down our own notification from a day ago and not just sharing Hydroxychloroquine but also Paracetemol to other countries so it would look as if India is sharing with other countries. Keep in mind, that India, Brazil haven t seen eye to eye on trade agreements of late and Paracetemol prices have risen in India. The price rise has been because the API (Active Pharmaceutical Ingredients) for the same come from China where the supply chain will take time to be fixed and we would also have to open up, although should we, should we not is another question altogether. I talk about supply chains as lean supply chains were the talk since late 90 s when the Japanese introduced Just-in-time manufacturing which lead to lean supply chains as well as lot of outsourcing as consequence. Of course, the companies saved money but at the cost of flexibility and how this model was perhaps flawed was shared by a series of articles in Economist as early as 2004 when there were lot of shocks to that model and would be exaberated since then. There have been frequent shocks to these fragile ecosystem more since 2008 after the financial meltdown and this would put more companies out of business than ever before. The MSME sector in India had already been severely impacted first by demonetization and then by the horrendous implementation of GST whose cries can be heard from all sectors. Also the frequent changing of GST taxes has made markets jumpy and investors unsure. With judgements such as retrospective taxes, AGR (Adjusted Gross Revenue) etc. it made not only the international investors scared, but also domestic investors. The flight of the capital has been noticeable. This I had shared before when Indian Government shared about LRS report which it hasn t since then. In fact Outlook Business had an interesting article about it where incidentally it talked about localcircles, a community networking platform where you get to know of lot of things and whom I am also a member of. At the very end I apologize for not sharing the blog post before but then I was feeling down but then I m not the only one.

Reproducible Builds: Reproducible Builds in March 2020

Welcome to the March 2020 report from the Reproducible Builds project. In our reports we outline the most important things that we have been up to over the past month and some plans for the future.
What are reproducible builds? One of the original promises of open source software is that distributed peer review and transparency of process results in enhanced end-user security. However, whilst anyone may inspect the source code of free and open source software for malicious flaws, almost all software today is distributed as pre-compiled binaries. This allows nefarious third-parties to compromise systems by injecting malicious code into ostensibly secure software during the various compilation and distribution processes.

News The report from our recent summit in Marrakesh was published and is now available in both PDF and HTML formats. A sincere thank you to all of the Reproducible Builds community for the input to the event a sincere thank you to Aspiration for preparing and collating this report. Harmut Schorrig published a detailed document on how to compile Java applications in such as way that the .jar build artefact is reproducible across builds. A practical and hands-on guide, it details how to avoid unnecessary differences between builds by explicitly declaring an encoding as the default value differs across Linux and MS Windows systems and ensuring that the generated .jar a variant of a .zip archive does not embed any nondeterministic filesystem metadata, and so on. Janneke gave a quick presentation on GNU Mes and reproducible builds during the lighting talk session at LibrePlanet 2020. [ ] Vagrant Cascadian presented There and Back Again, Reproducibly! video at SCaLE 18x in Pasadena in California which generated some attention on Twitter. Herv Boutemy mentioned on our mailing list in a thread titled Rebuilding and checking Reproducible Builds from Maven Central repository that since the update of a central build script (the parent POM ) every Apache project using the Maven build system should build reproducibly. A follow-up discussion regarding how to perform such rebuilds was also started on the Apache mailing list. The Telegram instant-messaging platform announced that they had updated their iOS and Android OS applications and claim that they are reproducible according to their full instructions, verifying that its original source code is exactly the same code that is used to build the versions available on the Apple App Store and Google Play distribution platforms respectfully. Herv Boutemy also reported about a new project called reproducible-central which aims to allow anyone to rebuild a component from the Maven Central Repository that is expected to be reproducible and check that the result is as expected. In last month s report we detailed Omar Navarro Leija s work in and around an academic paper titled Reproducible Containers which describes in detail the workings of a user-space container tool called dettrace (PDF). Since then, the PhD student from the University Of Pennsylvania presented on this tool at the ASPLOS 2020 conference in Lausanne, Switzerland. Furthermore, there were contributions to dettrace from the Reproducible Builds community itself. [ ][ ]

Distribution work

openSUSE In openSUSE, Bernhard M. Wiedemann published his monthly Reproducible Builds status update as well as made the following changes within the distribution itself:

Debian Chris Lamb further refined his merge request for the debian-installer component to allow all arguments from sources.list files (such as [check-valid-until=no] ) in order that we can test the reproducibility of the installer images on the Reproducible Builds own testing infrastructure. (#13) Holger Levsen filed a number of bug reports against the debrebuild tool that attempts to rebuild a Debian package given a .buildinfo file as input, including: 48 reviews of Debian packages were added, 17 were updated and 34 were removed this month adding to our knowledge about identified issues. Many issue types were noticed, categorised and updated by Chris Lamb, including: Finally, Holger opened a bug report against the software running tracker.debian.org, a service for Debian Developers to follow the evolution of packages via web and email interfaces to request that they integrate information from buildinfos.debian.net (#955434) and Chris Lamb kept isdebianreproducibleyet.com up to date. [ ]

Software development

diffoscope Chris Lamb made the following changes to diffoscope, the Reproducible Builds project s in-depth and content-aware diff utility that can locate and diagnose reproducibility issues, including preparing and uploading version 138 to Debian:
  • Improvements:
    • Don t allow errors with R script deserialisation cause the entire operation to fail, for example if an external library cannot be loaded. (#91)
    • Experiment with memoising output from expensive external commands, eg. readelf. (#93)
    • Use dumppdf from the python3-pdfminer if we do not see any other differences from pdftext, etc. (#92)
    • Prevent a traceback when comparing two R .rdx files directly as the get_member method will return a file even if the file is missing. [ ]
  • Reporting:
    • Display the supported file formats into the package long description. (#90)
    • Print a potentially-helpful message if the PyPDF2 module is not installed. [ ]
    • Remove any duplicate comparator descriptions when formatting in the --help output or in the package long description. [ ]
    • Weaken Install the X package to get a better output message to may produce a better output as the former is not actually guaranteed. [ ]
  • Misc:
    • Ensure we only parse the recommended packages from --list-debian-substvars when we want them for debian/tests/control generation. [ ]
    • Add upstream metadata file [ ] and add a Lintian override for upstream-metadata-in-native-source as we are upstream. [ ]
    • Inline the RequiredToolNotFound.get_package method s functionality as it is only used once. [ ]
    • Drop the deprecated py36 = [..] argument in the pyproject.toml file. [ ]
In addition, Vagrant Cascadian updated diffoscope in GNU Guix to version 138 [ ], as well as updating reprotest our end-user tool to build same source code twice in widely differing environments and then checks the binaries produced by each build for any differences to version 0.7.14 [ ].

Upstream patches The Reproducible Builds project detects, dissects and attempts to fix as many currently-unreproducible packages as possible. We endeavour to send all of our patches upstream where appropriate. This month we wrote a large number of such patches, including:

Project documentation There was further work performed on our documentation and website this month including Alex Wilson adding a section regarding using Gradle for reproducible builds in JVM projects [ ] and Holger Levsen added the report from our recent summit in Marrakesh [ ][ ]. In addition, Chris Lamb made a number of changes, including correcting the syntax of some CSS class formatting [ ], improved some filed against copy a little better [ ] and corrected a reference to calendar.monthrange Python method in a utility function. [ ]

Testing framework We operate a large and many-featured Jenkins-based testing framework that powers tests.reproducible-builds.org that, amongst many other tasks, tracks the status of our reproducibility efforts as well as identifies any regressions that have been introduced. This month, Chris Lamb reworked the web-based package rescheduling tool to:
  • Require a HTTP POST method in the web-based scheduler as not only should HTTP GET requests be idempotent but this will allow many future improvements in the user interface. [ ][ ][ ]
  • Improve the authentication error message in said rescheduler to suggest that the developer s SSL certificate may have expired. [ ]
In addition, Holger Levsen made the following changes:
  • Add a new ath97 subtarget for the OpenWrt distribution.
  • Revisit ordering of Debian suites; sort the experimental distribution last and reverse the ordering of suites to prioritise the suites in development. [ ][ ][ ]
  • Schedule Debian buster and bullseye a little less in order to allow unstable to catch up on the i386 architecture. [ ][ ]
  • Various cosmetic changes to the web-based scheduler. [ ][ ][ ][ ]
  • Improve wordings in the node health maintenance output. [ ]
Lastly, Vagrant Cascadian updated a link to the (formerly) weekly news to our reports page [ ] and kpcyrd fixed the escaping in an Alpine Linux inline patch [ ]. The usual build nodes maintenance was performed by Holger Levsen [ ][ ], Mattia Rizzolo [ ] and Vagrant Cascadian [ ][ ].
If you are interested in contributing to the Reproducible Builds project, please visit our Contribute page on our website. However, you can get in touch with us via:

This month s report was written by Bernhard M. Wiedemann, Chris Lamb, Holger Levsen and Vagrant Cascadian. It was subsequently reviewed by a bunch of Reproducible Builds folks on IRC and the mailing list.

5 April 2020

Hideki Yamane: Zoom: You should hire an appropriate package maintainer

Through my daily job, sometimes I should use zoom for meetings and webinar but several resources indicate that they didn't pay enough security effort to their product, so I've decided to remove it from my laptop. However, I've found a weird message at that time.
The following packages will be REMOVED:
zoom*
0 upgraded, 0 newly installed, 1 to remove and 45 not upgraded.
After this operation, 269 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 362466 files and directories currently installed.)
Removing zoom (3.5.374815.0324) ...
run post uninstall script, action is remove ...
current home is /root
Processing triggers for mime-support (3.64) ...
Processing triggers for gnome-menus (3.36.0-1) ...
Processing triggers for shared-mime-info (1.15-1) ...
Processing triggers for desktop-file-utils (0.24-1) ...
(Reading database ... 361169 files and directories currently installed.)
Purging configuration files for zoom (3.5.374815.0324) ...
run post uninstall script, action is purge ...
current home is /root
Wait. "current home is /root"? What did you do? Then I've extracted its package (ar -x zoom_amd64.deb; tar xvf contro.tar.xz; view post*)
#!/bin/bash
# Program:
# script to be run after package installation

echo "run post install script, action is $1..."

#ln -s -f /opt/zoom/ZoomLauncher /usr/bin/zoom

#$1 folder path
function remove_folder

if [ -d $1 ]; then
rm -rf $1
fi


echo current home is $HOME
remove_folder "$HOME/.cache/zoom"
(snip)
Ouch. When I run apt with sudo, $HOME is /root. So, their maintscript tried to remove files under /root! Did they do any tests? Even if it would work well, touch user's files under $Home is NOT a good idea...

And it seems that not only for .deb package but also .rpm package.



2 April 2020

Ulrike Uhlig: Breaking the chain reaction of reactions to reactions

Sometimes, in our day-to-day-interactions, communication becomes disruptive, resembling a chain of reactions to reactions to reactions. Sometimes we lose the capacity to express our ideas and feelings. Sometimes communication just gets stuck, maybe conflict breaks out. When we see these same patterns over and over again, this might be due to the ever same roles that we adopt and play. Learnt in childhood, these roles are deeply ingrained in our adult selves, and acted out as unconscious scripts. Until we notice and work on them. This is a post inspired by contents from my mediation training. In the 1960s, Stephen Karpman has thought of a model of human communication that maps the destructive interactions which occur between people. This map is known as the drama triangle. Karpman defined three roles that interact with each other. We can play one role at work, and a different one at home, and another one with our children. Or we can switch from one role to the other in just one conversation. The three roles are: Does this sound familiar? "Involvement in an unhealthy drama triangle is not something another person is doing to you. It's something you are doing with another person or persons." Well, to be more precise, it's something that we are all doing to each other: "Drama triangles form when participants who are predispositioned to adopt the roles of a drama triangle come together over an issue." (quoted from: Escaping conflict and the Karpman Drama Triangle.) People act out these roles to meet personal (often unconscious) needs. But each of these roles is toxic in that it sees others as problems to react to. In not being able to see that we take on these roles, we keep the triangle going, like in a dispute in which one word provokes another until someone leaves, slamming the door. This is drama. When we are stuck in the drama triangle, no one wins because all three roles "cause pain", "perpetuate shame [and] guilt", and "keep people caught in dysfunctional behavior" (quoted from Lynne Namka: The Drama Triangle, Three Roles of Victim-hood). How to get out of the drama triangle Awareness. To get out of the triangle, it is foremost suggested to be aware of its existence. I agree, it helps. I see it everywhere now. Identifying one's role and starting to act differently. While we switch roles, we generally take on a preferred role that we act out most of the time, and that was learnt in childhood. (I found a test to identify one's common primary role in German.) But how do we act differently? We need to take another look at that uncanny triangle. From the drama triangle to the winner triangle I found it insightful to ask what benefit each role could potentially bring into the interaction.
Acey Choy has created the Winner triangle, in 1990, as an attempt to transform social interactions away from drama. Her winner triangle shifts our perceptions of the roles: the Victim becomes the Vulnerable, the Rescuer becomes the Caring, the Persecutor becomes the Assertive.
Persecutor            Rescuer       Assertive              Caring
I'm right.            I'm good.     I have needs.          I'm listening.
    ----------------------              ----------------------
    \                    /              \                    /
     \                  /                \                  /
      \                /                  \                /
       \              /                    \              /
        \            /                      \            /
         \          /                        \          /
          \        /                          \        /
           \      /                            \      /
            \    /                              \    /
             \  /                                \  /
              \/                                  \/
            Victim                            Vulnerable
            I'm blameless.                    I'm struggling.
Karpman Dreaded Drama Triangle            Choy's Winner Triangle
The Assertive "I have needs." has a calling, aims at change, initiates, and gives feedback. Skills to learn: The Assertive needs to learn to identify their needs, communicate them, and negotiate with others on eye level without shaming, punishing, or belittling them. The Assertive needs to learn to give constructive feedback, without dismissing others. (In the workplace, it could be helpful to have a space for this.) The Assertive could benefit from learning to use I-Statements. The Caring "I'm listening." shows good will and sensitivity, cares, is empathic and supportive. Skills to learn: The Caring needs to learn to respect the boundaries of others: trusting their abilities to think, problem solve and talk for themselves. Therefore, the Caring could benefit from improving their active listening skills. Furthermore the Caring needs to learn to identify and respect their own boundaries and not to do things only because it makes them feel better about themselves. The Vulnerable "I'm struggling." has the skill of seeing and naming problems. Skills to learn: The Vulnerable needs to learn to acknowledge their feelings and needs, practice self-awareness, and self-compassion. They need to untie their self-esteem from the validation of other people. They need to learn to take care of themselves, and to strengthen their problem solving and decision making skills. What has this got to do with autonomy and power structures? Each of these interactions is embedded in larger society, and, as said above, we learn these roles from childhood. Therefore, we perpetually reproduce power structures, and learnt behavior. I doubt that fixing this on an individual level is sufficient to transform our interactions outside of small groups, families or work places. Although that would be a good start. We can see that the triangle holds together because the Victim, seemingly devoid of a way to handle their own needs, transfers care of their needs to the Rescuer, thereby giving up on their autonomy. The Rescuer is provided by the Victim with a sense of autonomy, knowledge, and power, that only works while denying the Victim their autonomy. At the same time, the Persecutor denies everyone else's needs and autonomy, and feels powerful by dismissing others. I've recently mentioned the importance of autonomy in order to avoid burnout, and as a means to control one's own life. If the Rescuer can acknowledge being in the triangle, and give the Victim autonomy, by supporting them with compassion, empathy, and guidance, and at the same time respecting their own boundaries, we could find even more ways to escape the drama triangle. Notes My description of the roles was heavily inspired by the article Escaping Conflict and the Karpman Drama Triangle that has a lot more detail on how to escape the triangle, and how to recognize when we're moving into one of the roles. While the article is informing families living with a person suffering from a spectrum of Borderline Personality Disorder, the content applies to any dysfunctional interaction.

1 April 2020

Sylvain Beucler: Debian LTS and ELTS - March 2020

Debian LTS Logo Here is my transparent report for my work on the Debian Long Term Support (LTS) and Debian Extended Long Term Support (ELTS), which extend the security support for past Debian releases, as a paid contributor. In March, the monthly sponsored hours were split evenly among contributors depending on their max availability - I was assigned 30h for LTS (out of 30 max; all done) and 20h for ELTS (out of 20 max; I did 0). Most contributors claimed vulnerabilities by performing early CVE monitoring/triaging on their own, making me question the relevance of the Front-Desk role. It could be due to a transient combination of higher hours volume and lower open vulnerabilities. Working as a collective of hourly paid freelancers makes it more likely to work in silos, resulting in little interaction when raising workflow topics on the mailing list. Maybe we're reaching a point where regular team meetings will be benefical. As previously mentioned, I structure my work keeping the global Debian security in mind. It can be stressful though, and I believe current communication practices may deter such initiatives. ELTS - Wheezy LTS - Jessie Documentation/Scripts

Joey Hess: DIN distractions

My offgrid house has an industrial automation panel. A row of electrical devices, mounted on a metal rail. Many wires neatly extend from it above and below, disappearing into wire gutters. I started building this in February, before covid-19 was impacting us here, when lots of mail orders were no big problem, and getting an unusual 3D-printed DIN rail bracket for a SSD was just a couple clicks. I finished a month later, deep into social isolation and quarentine, scrounging around the house for scrap wire, scavenging screws from unused stuff and cutting them to size, and hoping I would not end up in a "need just one more part that I can't get" situation. It got rather elaborate, and working on it was often a welcome distraction from the news when I couldn't concentrate on my usual work. I'm posting this now because people sometimes tell me they like hearing about my offfgrid stuff, and perhaps you could use a distraction too. The panel has my house's computer on it, as well as both AC and DC power distribution, breakers, and switching. Since the house is offgrid, the panel is designed to let every non-essential power drain be turned off, from my offgrid fridge to the 20 terabytes of offline storage to the inverter and satellite dish, the spring pump for my gravity flow water system, and even the power outlet by the kitchen sink. Saving power is part of why I'm using old-school relays and stuff and not IOT devices, the other reason is of course: IOT devices are horrible dystopian e-waste. I'm taking the utopian Star Trek approach, where I can command "full power to the vacuum cleaner!" Two circuit boards, connected by numerous ribbon cables, and clearly hand-soldered. The smaller board is suspended above the larger. An electrical schematic, of moderate complexity. At the core of the panel, next to the cubietruck arm board, is a custom IO daughterboard. Designed and built by hand to fit into a DIN mount case, it uses every GPIO pin on the cubietruck's main GPIO header. Making this board took 40+ hours, and was about half the project. It got pretty tight in there. This was my first foray into DIN rail mount, and it really is industrial lego -- a whole universe of parts that all fit together and are immensely flexible. Often priced more than seems reasonable for a little bit of plastic and metal, until you look at the spec sheets and the ratings. (Total cost for my panel was $400.) It's odd that it's not more used outside its niche -- I came of age in the Bay Area, surrounded by rack mount equipment, but no DIN mount equipment. Hacking the hardware in a rack is unusual, but DIN invites hacking. Admittedly, this is a second system kind of project, replacing some unsightly shelves full of gear and wires everywhere with something kind of overdone. But should be worth it in the long run as new gear gets clipped into place and it evolves for changing needs. Also, wire gutters, where have you been all my life? A cramped utility room with an entire wall covered with electronic gear, including the DIN rail, which is surrounded by wire gutters Detail of a wire gutter with the cover removed. Numerous large and small wires run along it and exit here and there. Finally, if you'd like to know what everything on the DIN rail is, from left to right: Ground block, 24v DC disconnect, fridge GFI, spare GFI, USB hub switch, computer switch, +24v block, -24v block, IO daughterboard, 1tb SSD, arm board, modem, 3 USB hubs, 5 relays, AC hot block, AC neutral block, DC-DC power converters, humidity sensor. Full width of DIN rail.

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