skarnet.org

Software

Unless otherwise mentioned, all of this software builds and runs under every flavour of Unix - and only Unix.

Current, released, maintained software

• skalibs
  A set of general-purpose C programming libraries. You need this first: all the other software in this list depends on it.
• execline
  A small scripting language, to be used in place of a shell in non-interactive scripts.
• s6
  skarnet.org's small & secure supervision software suite. Comes with an ultra-fast init replacement, process management tools, an asynchronous locking library, and more.
• s6-rc
  A complete service manager for s6 systems.
• s6-portable-utils
  Tiny portable generic utilities.
• s6-linux-utils
  Tiny Linux-specific utilities.
• s6-dns
  Good, usable DNS client libraries (synchronous and asynchronous), and command-line DNS client utilities.
• s6-networking
  UCSPI Unix and TCP tools, a SSL/TLS tunnel, access control tools, and network time management utilities.
• s6-linux-init
  A tool to automate the creation of suitable stage 1 init binaries for s6-based Linux systems.
• lh-bootstrap
  A set of scripts to build a disk image (for QEMU, for instance), running s6 and s6-rc, with an Internet connection.
• sdnotify-wrapper
  A wrapper for daemons so they can use the simple readiness notification mechanism recommended with s6 and still work under systemd with proper readiness notification, without having to use the sd_notify() interface themselves.
• mdevd
  A Linux kernel event manager daemon (like udevd) that understands the mdev configuration file format and does not fork.
• utmps
  A secure utmp/wtmp implementation.
• nsss
  A small and statically linkable alternative to Name Service Switch.
• bcnm
  A better client network manager.

Software in the works, available via git, but without numbered releases

• dnsfunnel
  A small local DNS forwarder, to get away from multiple nameserver entries in /etc/resolv.conf.
• s6-frontend
  Tools to make the s6 ecosystem more user-friendly.
• skabus
  A lightweight Unix message bus.
• pamela
  A PAM wrapper to encapsulate dynamic loading of modules. Unfortunately, the pamela experiment has shown that common PAM practices makes it impossible to implement PAM in a secure way, so initiatives like pamela are bound to fail. Development on this project is very unlikely to continue.

Obsolete software

Software listed here might disappear at any moment. This list only exists for transitional purposes.

• minidentd
  A small ident server. (Now included in s6-networking.)
• skadns
  An asynchronous DNS client library. (Now included in s6-dns.)
• conn-tools
  A collection of simple tools to handle reliable connections between processes. (Replaced with s6-networking.)
• skaembutils
  Tiny portable utilities that I found missing from the embutils. (Replaced with s6-portable-utils.)
• minutils
  Tiny Linux-specific utilities that I found missing from the embutils. (Replaced with s6-linux-utils.)
• minnotify
  A client and a server to implement general-purpose notification over the network. (Useless now that execline exists: can be replaced by trivial execline scripts.)
• symtools
  A collection of simple tools to handle symlinks gracefully. (Now included in s6-portable-utils.)
• ucspilogd
  A very, very small syslogd replacement. (Now included in s6.)
• The salted project has been abandoned. Instead, TLS/SSL support has been added to s6-networking: with the BearSSL backend, it is possible to offer this support while still using extremely few resources.

Adaptations or patches to other people's software

• David Madore's Book of Infinity, as a single C file suitable for compilation with skalibs.
  The Book of Infinity is a web robot trap.
• David Madore's superstrip, as a single C file suitable for compilation with skalibs.
  superstrip is a very aggressive ELF stripping utility.
• djbdns-fwdzone
  A patch to djbdns to allow dnscache to perform resolution or forwarding according to the query zone.
• nistp224-buffer
  A patch to nistp224 to make the main binaries use djb's buffer library instead of stdio.
• qmail-qmtproutes
  An add-on to Russell Nelson's qmail-1.03-qmtpc patch for qmail. This one allows you to send mail via QMTP using a qmtproutes file.

Notes

• Current versions of the packages use a standard ./configure && make && sudo make install installation scheme. Older versions use an ad-hoc installation scheme; if you need to install an older version and need help, please contact the skaware mailing-list.