[gentoo-dev] Re: rfc: renaming "rc" binary in OpenRC

[Martin Vaeth <vaeth@mathematik.uni-wuerzburg.de>]

Patrick Lauer <patrick@gentoo.org> wrote:
> On 12/12/2013 05:28 AM, Rich Freeman wrote:
>>
>> I think one thing that would be nice to dream about someday would be a
>> systemd-compatibility init.d script.

[...]

> I don't think this can be done in a way that adds value to users.

The converse is simpler and for certain cases already available
(the short openrc-wrapper script in the mv overlay):
You can use (simple) init.d scripts from within systemd.

Moreover, systemd's static /etc/modules-load.d mechanism can
trivially be emulated with the following line in /etc/conf.d/modules:

modules=$(sed -n -e '/^[^;#]/p' /etc/modules-load.d/*.conf \
   /usr/lib/modules-load.d/*.conf 2>/dev/null)

Using both mechanisms, it is not too hard to setup a system
which can boot with both init systems without duplicating too much
configuration (for that configuration which is in the intersection
of the features of both systems).
Main duplication is the netifrc/netctl setup which
would be way too complex to use outside of openrc/systemd.