Re: [gentoo-dev] eselect init

[Fabio Erculiani <lxnay@gentoo.org>]

There is a new version of eselect-init in the systemd-love overlay to play with.
The new version saw the following major changes:

- the /sbin/init (aka the symlink that eselect-init handles) can be
changed to whatever one wants through make.conf [1] (this is a compile
time option, as documented in the eclass)
- only init is currently handled by eselect-init, which is now using a
very small wrapper POSIX shell script to redirect the calls to the
currently running init [2]
- the wrapper and its code paths are now documented in the
eselect-init eclass [2] [3]

You need systemd and sysvinit from the same overlay for it to work.
If you intend to use switch between systemd to openrc (and vice
versa), make sure to install the rest of the packages in that overlay.
At the moment, if you want to switch, you also need to use
eselect-settingsd. However, I am planning to drop eselect-settingsd:
openrc-settingsd and systemd share the same settingsd dbus interface
while they call different executables, systemd initializes its dbus
services without relying on dbus activation, so the Exec= part of the
service descriptor file is currently set to /bin/false, this rings a
bell :D, because it is possible to replace /bin/false with a script
that starts the respective services when dbus activation is used
(which means that systemd hasn't booted the system). This would make
possible to remove the blocker dependency in openrc-settingsd and
systemd somehow.

[1] https://github.com/Sabayon/systemd-love/commit/ced29311348a81a2573b030b1316f1c3a0335c5b
[2] https://github.com/Sabayon/systemd-love/commit/9eea3ff713c8fa0391e7b1bfa494d533dc21c0be
[3] https://github.com/Sabayon/systemd-love/blob/master/eclass/eselect-init.eclass

-- 
Fabio Erculiani