New versions of all the skarnet.org packages are available.
skalibs has undergone a major update, with a few APIs having
and others having changed. Compatibility with previous versions is
Consequently, all the rest of the skarnet.org software has undergone
at least a release bump, in order to build with the new skalibs. But
some packages also have new functionality added (hence, a minor bump),
and others also have their own incompatible changes (hence, a major
The new versions are the following:
Additionally, a new package has been released:
Dependencies have all been updated to the latest versions. They are,
this time, partially strict: libraries and binaries may build with older
releases of their dependencies, but not across major version bumps. The
safest approach is to upgrade everything at the same time.
You do not need to recompile your s6-rc service databases or recreate
your s6-linux-init run-images.
You should restart your supervision tree after upgrading skalibs and
as soon as is convenient for you.
Details of major and minor package changes follow.
- A lot of obsolete or useless functionality has been removed:
libbiguint, rc4, md5, iobuffer, skasigaction, environ.h and
getpeereid.h headers, various functions that have not proven their
value in a while.
- Some functions changed signatures or changed names, or both.
- All custom types ending in _t have been renamed, to avoid treading on
POSIX namespace. (The same change has not been done yet in other
packages, but skalibs was the biggest offender by far.)
- Signal functions have been deeply reworked.
- cdb has been reworked, the API is now more user-friendly.
- New functions have been added.
The deletion of significant portions of code has made skalibs leaner.
libskarnet.so has dropped under 190 kB on x86_64.
The cdb rewrite on its own has helped reduce an important amount of
boilerplate in cdb-using code.
All in all, code linked against the new skalibs should be slightly
smaller and use a tiny bit less RAM.
- nsss-switch wire protocol slightly modified, which is enough to
warrant a major version bump.
- _r functions are now entirely thread-safe.
- Spawned nsssd programs are now persistent and only expire after a
timeout on non-enumeration queries. This saves a lot of forking with
applications that can call primitives such as getpwnam() repeatedly, as
e.g. mdevd does when initially parsing its configuration file.
- New nsssd-switch program, implementing real nsswitch functionality
by dispatching queries to various backends according to a script.
It does not dlopen a single library or read a single config file.
- New binary: case. It compares a value against a series of regular
expressions, executing into another command line on the first match.
- Some libs6 header names have been simplified.
- s6-svwait now accepts -r and -R options.
- s6-supervise now reads an optional lock-fd file in the service
directory; if it finds one, the first action of the service is to take
a blocking lock. This prevents confusion when a controller process dies
while still leaving workers holding resources; it also prevents log
spamming on user mistakes (autobackgrounding services, notably).
- New binaries: s6-socklog, s6-svlink, s6-svunlink. The former is a
rewrite of smarden.org's socklog program, in order to implement a fully
functional syslogd with only s6 programs. The latter are tools that
and stop services by symlinking/unlinking service directories from a
scan directory, in order to make it easier to integrate s6-style
in boot scripts for sequential service managers such as OpenRC.
- minidentd has been removed. It was an old and somehow still buggy
piece of code that was only hanging around for nostalgia reasons.
- Full support for client certificates. Details of the client
certificate are transmitted to the application via environment
variables (or via an environment string in the case of opportunistic
- Full SNI support, including server-side. (That involved a deep dive
into the bearssl internals, which is why it took so long.) The filenames
containing secret keys and certificates for <domain> are read in the
environment variables KEYFILE:<domain> and CERTFILE:<domain>.
Complete client certificate and SNI support now make the TLS part of
s6-networking a fully viable replacement of stunnel and other similar
TLS tunneling tools. This is most interesting when s6-networking is
built against bearssl, which uses about 1/9 of the resources that
- A new option to mdevd is available: -O <nlgroups>.
This option makes mdevd rebroadcast uevents to a netlink group (or set
of netlink groups) once they have been handled. This allows applications
to read uevents from a netlink group *after* the device manager is done
with them. This is useful, for instance, when pairing mdevd with
libudev-zero for full udev emulation.
- The * and & directives, which previously were only triggered by
"add" and "remove" actions, are now triggered by *all* action types.
This gives users full scripting access to any event, which can be
used to implement complex rules similar to udev ones.
These two changes make it possible to now build a full-featured desktop
system based on mdevd + libudev-zero, without running systemd-udevd or
This new package, in conjunction with the latest s6-networking,
implements the STARTTLS functionality for inetd-like mail servers that
do not already support it. (Currently only tested with qmail-smtpd.)
If you have noticed that sending mail to skarnet.org supports STARTTLS
now, it is thanks to this little piece of software.