On Fri, Jun 19, 2015 at 11:33 PM, Didier Kryn <kryn@???> wrote:
> Le 18/06/2015 17:23, Laurent Bercot a écrit :
>> Absolutely. Why enforce exclusion when you can have a choice ?
>> Make a "currently active" vs. "inactive" switch, I don't know the
>> Debian/Devuan terminology, and allow users to install both.
>
>

>     There's already an exemple of that kind: you may have xdm, gdm3, kdm and
> lightdm installed; you decide which is the one in effect by running
> dpkg-reconfigure any-of-them.

Yup, assuming the kernel-to-init code understands chained symlinks it
would be relatively easy to port all init systems to the
"alternatives" feature :
The generic name is not a direct symbolic link to the selected
alternative. Instead, it is a symbolic link to a name
in the alternatives directory, which in turn is a symbolic link to
the actual file referenced.