Bug#132542: sysvinit: please make /etc/init.d/rcS a conffile

[Dmitry Bogatov]

[2019-01-15 17:35] Thorsten Glaser <t.glaser at tarent.de>
> On Tue, 15 Jan 2019, Dmitry Bogatov wrote:
>
> > As far as I can tell, /sbin/init invocation is late enough.  Usrmerge is
> > coming. /usr is mounted by initramfs since initramfs-tools=0.117 (25 Sep 2014):
>
> The latter is okay for systems booted with initramfs. But I
> recall that it was decided some not too long time ago that
> people not using it should ensure their /usr is available
> by themselves.
>
> I do not agree with usrmerge, and I fully expect to be able
> to use Debian without that systemd-originating concept.
>
> But I agree it’s “probably” late enough, although nice to be
> considerate to people whose systems aren’t.

> [Pierre Ynard]
> Also, what is the policy about /usr/libexec/ regarding
> architecture-dependent and -independent executables?

FHS uses term "binaries". I believe scripts qualify too, since /lib is
explicitly for "shared libraries and kernel modules".  Installation of
{rc, rcS} into either /lib or /etc is violation of FHS.

> [Pierre Ynard]
> My personal feelings here would be similar to Thorsten's, but what I
> would put forward is that considering how critical a component of the
> system init is, perhaps it's best to strive for robustness for now.

Wow. So strong reaction. Fine. Collegues, I understand your attitude.
You have some setup, with separate / and /usr, without initramfs, and
you do not want change anything.

  Okay. I moved {rc, rcS} to /lib (see commit 51170798), change will be
  in 2.93-4 (due in few days). Sysvinit will *not* assume, that /usr is
  mounted at /sbin/init invocation in Buster. I promise.

But what next? Assumption of mounted /usr simplify things.  You can take
a look at #551555, but I do not think this is singular case. Two-part
mount process complicates initscripts for, well, what?

I do understand dislike of initramfs, but I do not understand why
separate / and /usr. So,

 * what are benefits of setup without initramfs *and* with separate /usr
   partition on *fresh installation*?
 * what are your arguments aganist usrmerge?

PS. No offense intended to anybody. Sorry, if my previous emails felt
rude.