Systemd

systemd is the "master process" of a SprezzOS instance. It is the first userspace process invoked following the kernel/initramfs, and lives as PID 1 throughout the instance, playing the traditional role of /sbin/init (indeed, /sbin/init is a symlink to /lib/systemd/systemd on a typical SprezzOS box).

The Debian packages from which we derived generally did not ship systemd service files, though some upstream projects did ship their own. For each such package, we must add systemd support. We want to remain compatible with the Debian /etc/default system, so our systemd units specify these as EnrionmentFile entries as appropriate. The sysvinit file installed into /etc/init.d, however, is removed, and symlinks are no longer set up in /etc/rc.d.

Conversion

Service	Unit file	Starts appropriately?	Stops appropriately?
DBUS		Yes, 1.6.8-SprezzOS1	Yes, 1.6.8-SprezzOS1
GPM		No, 1.99.7-SprezzOS1git20130208	N/A
OpenNTPD		Yes, 20080406p-SprezzOS8	Yes, 20080406p-SprezzOS8
OpenSSH		Yes, 1:6.1p1-SprezzOS13	Yes, 1:6.1p1-SprezzOS13
Postfix		Broken, 2.10.0-SprezzOS1	N/A

See Also

• Gentoo's systemd unit archive
• ArchWiki's systemd wiki page