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Welcome to LWN.net The following subscription-only content has been made available to you by an LWN subscriber. Thousands of subscribers depend on LWN for the best news from the Linux and free software communities. If you enjoy this article, please consider subscribing to LWN. Thank you for visiting LWN.net! Fil-C is a memory-safe implementation of C and C++ that aims to let C code — complete with

The Ubuntu Project has announced that a bug in the Rust-based uutils version of the date command shipped with Ubuntu 25.10 broke automatic updates: Some Ubuntu 25.10 systems have been unable to automatically check for available software updates. Affected machines include cloud deployments, container images, Ubuntu Desktop and Ubuntu Server installs. The announcement includes remediation instructio

As with a mobile phone, a portable gaming device like the Steam Deck can contain lots of personal information that the owner would like to keep secret—especially given that such devices can do far more than gaming. Alberto Garcia worked with his colleagues at Igalia and people at Valve, the company behind the Steam gaming platform, to come up with a new tool to manage encrypted filesystems for Ste

Posted Sep 30, 2025 10:30 UTC (Tue) by patrakov (subscriber, #97174) [Link] (6 responses) Before Bcachefs getting mainlined, one had to get the whole kernel source tree from the Bcachefs author. This happened because this filesystem relied on changes in other subsystems, and was not just a self-contained add-on. Upon upstreaming, the required changes were applied to these subsystems, making Bcache

September 17, 2025 This article was contributed by Lee Phillips Typst is a program for document typesetting. It is especially well-suited to technical material incorporating elements such as mathematics, tables, and floating figures. It produces high-quality results, comparable to the gold standard, LaTeX, with a simpler markup system and easier customization, all while compiling documents more qu

Safe, ergonomic interoperability between Rust and C/C++ was a popular topic at RustConf 2025 in Seattle, Washington. Chandler Carruth gave a presentation about the different approaches to interoperability in Rust and Carbon, the experimental "(C++)++" language. His ultimate conclusion was that while Rust's ability to interface with other languages is expanding over time, it wouldn't offer a comple

The next release of systemd has been percolating for an unusually long time. Systemd releases are usually about six months apart, but v257 came out in December 2024, and v258 just now seems to be nearing the finish line; the third release candidate for v258 was published on August 20 (release notes). Now is a good time to dig in and take a look at some of the new features, enhancements, and remova

Welcome to LWN.net The following subscription-only content has been made available to you by an LWN subscriber. Thousands of subscribers depend on LWN for the best news from the Linux and free software communities. If you enjoy this article, please consider subscribing to LWN. Thank you for visiting LWN.net! Arnd Bergmann started his Open Source Summit Europe 2025 talk with a clear statement of po

Version 8.0 of the FFmpeg audio and video toolkit has been released. Thanks to several delays, and modernization of our entire infrastructure, this release ended up being one of our largest releases to date. In short, its new features are: Native decoders: APV, ProRes RAW, RealVideo 6.0, Sanyo LD-ADPCM, G.728 VVC decoder improvements: IBC, ACT, Palette Mode Vulkan compute-based codecs: FFv1 (encod

Statically typed programming languages can help catch mismatches between the kinds of values a program is intended to manipulate, and the values it actually manipulates. While there have been many bytes spent on discussions of whether this is worth the effort, some programming language designers believe that the type checking in current languages does not go far enough. Koka, an experimental funct

Performance of Python programs has been a major focus of development for the language over the last five years or so; the Faster CPython project has been a big part of that effort. One of its subprojects is to add an experimental just-in-time (JIT) compiler to the language; at last year's PyCon US, project member Brandt Bucher gave an introduction to the copy-and-patch JIT compiler. At PyCon US 20

The interfaces between C and Rust in the kernel have grown over time; any non-trivial Rust driver will use a number of these. Tasks like allocating memory, dealing with immovable structures, and interacting with locks are necessary for handling most devices. There are also many subsystem-specific bindings, but the focus of this third item in our series on writing Rust in the kernel will be on an o

In 2023, Fujita Tomonori wrote a Rust version of the existing driver for the Asix AX88796B embedded Ethernet controller. At slightly more than 100 lines, it's about as simple as a driver can be, and therefore is a useful touchstone for the differences between writing Rust and C in the kernel. Looking at the Rust syntax, types, and APIs used by the driver and contrasting them with the C version wil

Libxml2, an XML parser and toolkit, is an almost perfect example of the successes and failures of the open-source movement. In the 25 years since its first release, it has been widely adopted by open-source projects, for use in commercial software, and for government use. It also illustrates that while many organizations love using open-source software, far fewer have yet to see value in helping t

May 28, 2025 Pavel Březina and Francisco Triviño García The increasing sophistication of attackers has organizations realizing that perimeter-based security models are inadequate. Many are planning to transition their internal networks to a zero-trust architecture. This requires every communication on the network to be encrypted, authenticated, and authorized. This can be achieved in applications

At the Linux Application Summit (LAS) in April, Sebastian Wick said that, by many metrics, Flatpak is doing great. The Flatpak application-packaging format is popular with upstream developers, and with many users. More and more applications are being published in the Flathub application store, and the format is even being adopted by Linux distributions like Fedora. However, he worried that work on

OpenSSH 10.0 has been released. Support for the DSA signature algorithm, which was disabled by default beginning in 2015, has been removed. Other notable changes include using the post-quantum algorithm mlkem768x25519-sha256 for key agreement by default, support for systemd-style socket activation in Portable OpenSSH, and moving code for user authentication from the sshd-session binary to the new

The computer mouse is a wonderful invention, but for the past few months I've been working to use mine as little as possible for productivity and ergonomic reasons. It should not be surprising that there are quite a few open-source applications, utilities, and configuration options that are either designed to or incidentally assist in creating a keyboard-driven desktop. This includes tiling window

January 10, 2025 This article was contributed by Murukesh Mohanan The death of Bram Moolenaar, Vim founder and benevolent dictator for life (BDFL), in 2023 sent a shock through the community, and raised concern about the future of the project. At VimConf 2024 in November, current Vim maintainer Christian Brabandt delivered a keynote on "the new Vim project" that detailed how the community has reor

Emacs is, famously, an editor—perhaps far more—that is extensible using its own variant of the Lisp programming language, Emacs Lisp (or Elisp). This year's edition of EmacsConf, which is an annual "gathering" that has been held online for the past five years, had two separate talks on using a different variant of Lisp, Guile, for Emacs. Both projects would preserve Elisp compatibility, which is a

The traditional structure of a compiler forms a pipeline — parsing, type-checking, optimization, and code-generation, usually in that order. But modern programming languages have requirements that are ill-suited to such a design. Increasingly, compilers are moving toward other designs in order to support incremental compilation and low-latency responses for uses like integration into IDEs. Rust ha

Alejandro Colomar, who has been maintaining the Linux man pages for the last four years, has announced that he will have to stop that work. I've been doing it in my free time, and no company has sponsored that work at all. At the moment, I cannot sustain this work economically any more, and will temporarily and indefinitely stop working on this project. If any company has interests in the future o

LWN has covered BPF since its initial introduction to Linux, usually through the lens of the newest developments; this can make it hard to view the whole picture. BPF provides a way to extend a running kernel, without having to recompile and reboot. It does this in a safe way, so that malicious BPF programs cannot crash a running kernel, thanks to the BPF verifier. So how does the verifier actuall

The mseal() system call allows a process to prevent any future changes to portions of its address space (thus "sealing" them); it was patterned after the mimmutable() system call in OpenBSD. mseal() generated a lot of discussion, but it was finally merged for the upcoming 6.10 kernel release. While mseal() was initially aimed at securing the Chrome browser, the hope was that it would be useful els

For several years, contributors to the Rust project have been working to improve support for asynchronous code. The benefits of these efforts are not confined to asynchronous code, however. Members of the Rust community have been working toward adding explicit existential types to Rust since 2017. Existential types are not a common feature of programming languages (something the RFC acknowledges),

The Rust programming language differs from C in many ways; those differences tend to be what users admire in the language. But those differences can also lead to an impedance mismatch when Rust code is integrated into a C-dominated system, and it can be even worse in the kernel, which is not a typical C program. Memory models are a case in point. A programming language's view of memory is sufficie

Versions 5.6.0 and 5.6.1 of the XZ compression utility and library were shipped with a backdoor that targeted OpenSSH. Andres Freund discovered the backdoor by noticing that failed SSH logins were taking a lot of CPU time while doing some micro-benchmarking, and tracking down the backdoor from there. It was introduced by XZ co-maintainer "Jia Tan" — a probable alias for person or persons unknown.

Binbin Zhu BinBin Wang, of Tencent, is responsible for nearly 25% of the commits to the project. Some of the contributors without a readily identifiable employer surely are Redis employees, but it's clear that the company has not been working alone. (Note that some single-digit contributors were omitted.) Changing distribution model So it should be apparent that code contribution is beside the poi