Public bug reported:

Background: In the Debian version of the resolvconf package,
dh_installinit is run with the "--no-start" option and actions
equivalent to "invoke-rc.d resolvconf start" are performed later in the
postinst after necessary preparation has been done.

The problem: While converting from sysvinit to Upstart, "--no-start" was
replaced with "-r" but there are still some loose ends, some minor, but
I take this opportunity to mention them as well.

* First, the "#DEBHELPER#" token is in the wrong place. It should be
placed after the postinst code that linkifies and initializes the
database. The reason is that dh_installinit inserts "invoke-rc.d
resolvconf start" at the position of the token. (1) If the "invoke-rc.d
resolvconf start" happens before initialization of the database then the
initial contents of resolv.conf are out of date. (2) If the "invoke-rc.d
resolvconf start" happens before linkification and an update script
returns an error condition then linkification does not happen. This may
be one of the reasons for the malfunctions reported in bug #1000244.

A good place to put the token is right at the end of the file, just
before the "exit 0" line.

This was supposedly fixed at one point as indicated by the following
changelog entry

    - Move the #DEBHELPER# token in debian/postinst to after the resolv.conf
      symlink is set, [...]

but the current version (1.67ubuntu2) has the "#DEBHELPER#" token back
up at the top of the file.

* Second, the comment in the postinst still says that "--no-start" is
used

     # We use dh_installinit with --no-start

whereas this is not true in the Ubuntu version. Please remove this line.

* Third, this comment

                                # Even though we create this dir in the preinst,
                        # don't assume that it's still here; a reboot
                        # after unpack may have left us with no upstart
                        # job in place and /run cleaned out.
                        mkdir -p /run/resolvconf/interface

has irregular indentation and duplicates the comment that precedes the
if-then block. Simplest thing is to remove the comment (but not the
mkdir line!).

* Fourth, this comment

        # FHS violation; get rid of it, we use /run directly now.

incorrectly (IMHO) states that the use of a symbolic link
/etc/resolvconf/run -> (some-tmpfs)/resolvconf in the Debian version of
the package is a FHS violation. It is not. The run-time state directory
of Debian resolvconf is no more in /etc/ than the vi program is in /etc/
just because

    $ ls -l /usr/bin/vi
    lrwxrwxrwx 1 root root 20 Jun 13 09:55 /usr/bin/vi -> /etc/alternatives/vi

In Debian, /etc/resolvconf/run has only ever been a symbolic link to
some tmpfs. It is a configurable symbolic link.

So please replace the comment with something less controversial, such as
the following.

    # We use /run directly now.

** Affects: resolvconf (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1085862

Title:
  #DEBHELPER# token is in the wrong place, and other resolvconf postinst
  nits

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