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LWN.net is a comprehensive source of news and opinions from and about the Linux community. This is the main LWN.net feed, listing all articles which are posted to the site front page.
Updated: 1 hour 46 min ago

[$] LWN.net Weekly Edition for August 13, 2020

5 hours 14 min ago
The LWN.net Weekly Edition for August 13, 2020 is available.

[$] Building a Flutter application (part 1)

12 hours 45 min ago
In this two-part series, we will be implementing a simple RSS reader for LWN using the UI toolkit Flutter. The project recently announced version 1.20 of the toolkit on August 5. Flutter is a BSD-licensed UI development platform written in Dart that is backed by Canonical as a new way to develop desktop applications targeting Linux. Part one will cover some of the basics of the project and Flutter, with part two building on that work to focus on building a full interactive UI for the application.

Security updates for Wednesday

13 hours 18 min ago
Security updates have been issued by Debian (dovecot and roundcube), Fedora (python36), Gentoo (chromium), openSUSE (ark, firefox, go1.13, java-11-openjdk, libX11, wireshark, and xen), Red Hat (bind and kernel), SUSE (libreoffice and python36), and Ubuntu (dovecot and software-properties).

[$] Local locks in the kernel

Tuesday 11th of August 2020 09:10:50 PM
The Linux kernel has never lacked for synchronization primitives and locking mechanisms, so one might justifiably wonder why there might be a need to add another one. The addition of local locks to 5.8 provides an answer to that question. These locks, which have their origin in the realtime (PREEMPT_RT) tree, were created to solve some realtime-specific problems, but they also bring some much-needed structure to a common locking pattern used in non-realtime kernels as well.

Baker: Changing World, Changing Mozilla

Tuesday 11th of August 2020 06:54:51 PM
Mitchell Baker writes about changes at Mozilla, headlined by the laying-off of 250 people. "Recognizing that the old model where everything was free has consequences, means we must explore a range of different business opportunities and alternate value exchanges. How can we lead towards business models that honor and protect people while creating opportunities for our business to thrive? How can we, or others who want a better internet, or those who feel like a different balance should exist between social and public benefit and private profit offer an alternative?"

Security updates for Tuesday

Tuesday 11th of August 2020 05:43:41 PM
Security updates have been issued by Debian (firmware-nonfree, golang-github-seccomp-libseccomp-golang, and ruby-kramdown), Fedora (kernel, libmetalink, and nodejs), openSUSE (go1.13, perl-XML-Twig, and thunderbird), Oracle (kernel, libvncserver, and thunderbird), Red Hat (kernel-rt and python-paunch and openstack-tripleo-heat-templates), SUSE (dpdk, google-compute-engine, libX11, webkit2gtk3, xen, and xorg-x11-libX11), and Ubuntu (nss and samba).

Stable kernels 5.8.1, 5.7.15, 5.4.58, and 4.19.139

Tuesday 11th of August 2020 05:35:46 PM
Greg Kroah-Hartman has released the 5.8.1, 5.7.15, 5.4.58, and 4.19.139 stable kernels. As usual, these contain lots of important fixes throughout the tree; users should upgrade.

Emacs 27.1 released

Tuesday 11th of August 2020 03:29:39 PM
Version 27.1 of the Emacs editor is out. New features include support for arbitrary-sized integers, HarfBuzz support, improved drawing with Cairo, and the obligatory new JSON parser.

[$] End-to-end network programmability

Monday 10th of August 2020 10:20:51 PM
Nick McKeown kicked off the virtual Netdev 0x14 conference with a talk on extending the programmability of networking equipment well beyond where it is today. His vision is of an end-to-end system with programmable pieces at every level. Getting there will require collaboration between the developers of the networking stacks on endpoint operating systems as well as those of switches, routers, and other backbone equipment. The keynote was held on July 28, a little over two weeks before the seven days of talks, workshops, and tutorials for Netdev, which begins on August 13.

Security updates for Monday

Monday 10th of August 2020 04:12:41 PM
Security updates have been issued by Debian (pillow, ruby-kramdown, wpa, and xrdp), Fedora (ark and rpki-client), Gentoo (apache, ark, global, gthumb, and iproute2), openSUSE (chromium, grub2, java-11-openjdk, libX11, and opera), Red Hat (bind, chromium-browser, java-1.7.1-ibm, java-1.8.0-ibm, and libvncserver), SUSE (LibVNCServer, perl-XML-Twig, thunderbird, and xen), and Ubuntu (samba).

On Perl 7 and the Perl Steering Committee

Saturday 8th of August 2020 04:53:53 PM
For those who are wondering about the state of the proposed Perl 7 fork and the role of the newly formed Perl Steering Committee, Ricardo Signes has put together a detailed explanation that is worth a read. "You should not expect to see a stream of unjustified dictates issuing forth from some secret body on high. You should expect to see perl5-porters operating as it generally did: with proposals coming to the list, getting discussion, and then being thumbed up or down by the project manager. This is what has been happening for years, already. Some proposals were already discussed by the project manager and some were not. If you eliminated any named mailing list for doing this, it would still happen. The PSC is a means to say that there is a default group for such discussions. If you were wondering, its initial membership was formed from 'the people who came to or were invited to the Perl Core Summit' over the last few years."

[$] 5.9 Merge window, part 1

Friday 7th of August 2020 08:21:44 PM
As of this writing, just over 3,900 non-merge changesets have been pulled into the mainline repository for the 5.9 kernel development cycle. While this merge window has just begun, there is already a significant set of new features to point out.

Knauth elected Free Software Foundation president; Bénassy joins board

Friday 7th of August 2020 06:17:48 PM
The Free Software Foundation (FSF) has announced that Geoffrey Knauth has been elected president, and free software activist and developer Odile Bénassy has been appointed to the board of directors. Knauth is replacing Richard Stallman who resigned last year. In Knauth's statement, he said: "The FSF board chose me at this moment as a servant leader to help the community focus on our shared dedication to protect and grow software that respects our freedoms. It is also important to protect and grow the diverse membership of the community."

Security updates for Friday

Friday 7th of August 2020 04:14:50 PM
Security updates have been issued by CentOS (firefox, java-1.8.0-openjdk, java-11-openjdk, libvncserver, postgresql-jdbc, and thunderbird), Debian (firejail and gupnp), Fedora (cutter-re, postgresql-jdbc, radare2, and webkit2gtk3), openSUSE (chromium, firefox, kernel, and python-rtslib-fb), Oracle (container-tools:ol8, kernel, and nss and nspr), Scientific Linux (thunderbird), and SUSE (firefox, kernel, postgresql10 and postgresql12, python-ipaddress, and xen).

Stable kernels 5.7.14, 5.4.57, 4.19.138, and 4.14.193

Friday 7th of August 2020 03:38:24 PM
Greg Kroah-Hartman has released the 5.7.14, 5.4.57, 4.19.138, and 4.14.193 stable kernels. As usual, these contain lots of important fixes throughout the tree; users should upgrade.

[$] PHP struggles with attributes syntax

Thursday 6th of August 2020 11:31:21 PM
PHP 8.0 is on the horizon, and the project has imposed a feature freeze for the release. There's one exception to the feature freeze, though: the new attributes syntax. An attribute is syntactical metadata for PHP code, identical to what is called an "annotation" in other languages. Even though attributes have been voted on multiple times by the community, major contributor and creator of XDebug Derick Rethans threw a wrench into the works days before the feature freeze by challenging the current syntax. The ensuing discussion lead to the fourth attributes proposal for the year, with a special feature freeze exception being made by release manager Sara Golemon. This exception gives Rethans one more opportunity to convince the community to change how attributes work up to the Beta 3 release, scheduled for September 3.

The GNU C Library version 2.32 is now available

Thursday 6th of August 2020 04:26:28 PM
Version 2.32 of the GNU C Library (glibc) has been released. It contains support for Unicode 13.0.0, a new Kurdish/Sorani locale (ckb_IQ), support for audit modules listed in ELF sections of the executable, support for Synopsys ARC HS cores, new signal abbreviation and descriptive text functions (sigabbrev_np() and sigdescr_np()), similar functions for errno values (strerrorname_np() and strerrordesc_np()), branch protection security hardening for arm64, and more. There are also lots of bug fixes, deprecations, and removals, as well as four security fixes. More information can be found in the release notes.

Security updates for Thursday

Thursday 6th of August 2020 04:11:09 PM
Security updates have been issued by Debian (clamav and json-c), Fedora (python2, python36, and python37), Red Hat (thunderbird), Scientific Linux (thunderbird), SUSE (java-11-openjdk, kernel, rubygem-actionview-4_2, wireshark, xen, and xrdp), and Ubuntu (openjdk-8 and ppp).

[$] LWN.net Weekly Edition for August 6, 2020

Thursday 6th of August 2020 12:43:53 AM
The LWN.net Weekly Edition for August 6, 2020 is available.

[$] Checking out FreeCAD

Wednesday 5th of August 2020 07:56:53 PM
Our look at running a CNC milling machine using open-source software led me to another tool worth looking at: FreeCAD. I wasn't previously familiar with the program, so I decided to check it out. In this article I will walk through my experiences with using FreeCAD for the first time to do a variety of CNC-related tasks I normally would have used a commercial product for. I had varying degrees of success in my endeavors, but in the end came away with a positive opinion.