On Sat, 18 Oct 2014 20:59:54 -0700 Russ Allbery <r...@debian.org> wrote:
> When one of you has a chance, could you update this bug with the current
> thinking around how to handle upgrades, around the ordering of
> dependencies in libpam-systemd, and some of the other ideas (such as
> attempting to detect systems with /etc/inittab configuration or init
> scripts that don't follow systemd's assumptions) raised in those threads?
Not speaking for the systemd maintainers, but I just wrote and tested
the following shell code to detect sysvinit-specific configuration
(modified /etc/inittab or modified init scripts) that may indicate a
need for manual sysadmin action (and thus a prompt). This needs a bit
of work to add potential serial console getty lines generated by
finish-install to the list of "expected" lines, as well as any other
lines generated by older versions of finish-install.
inittab_unusual_lines="$(
grep '^[^#]' /etc/inittab |
while read line ; do
case "$line" in
'id:2:initdefault:') ;;
'si::sysinit:/etc/init.d/rcS') ;;
'~~:S:wait:/sbin/sulogin') ;;
'l0:0:wait:/etc/init.d/rc 0') ;;
'l1:1:wait:/etc/init.d/rc 1') ;;
'l2:2:wait:/etc/init.d/rc 2') ;;
'l3:3:wait:/etc/init.d/rc 3') ;;
'l4:4:wait:/etc/init.d/rc 4') ;;
'l5:5:wait:/etc/init.d/rc 5') ;;
'l6:6:wait:/etc/init.d/rc 6') ;;
'z6:6:respawn:/sbin/sulogin') ;;
'ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now') ;;
'pf::powerwait:/etc/init.d/powerfail start') ;;
'pn::powerfailnow:/etc/init.d/powerfail now') ;;
'po::powerokwait:/etc/init.d/powerfail stop') ;;
'1:2345:respawn:/sbin/getty 38400 tty1') ;;
'2:23:respawn:/sbin/getty 38400 tty2') ;;
'3:23:respawn:/sbin/getty 38400 tty3') ;;
'4:23:respawn:/sbin/getty 38400 tty4') ;;
'5:23:respawn:/sbin/getty 38400 tty5') ;;
'6:23:respawn:/sbin/getty 38400 tty6') ;;
*) echo "$line" ;;
esac
done
)"
modified_initscripts="$(
grep -lE '^/etc/init\.d/' /var/lib/dpkg/info/*.conffiles |
xargs basename -s '.conffiles' |
xargs dpkg -V |
grep '^..5...... c /etc/init\.d/' |
cut -d' ' -f3
)"
if [ -n "$inittab_unusual_lines" ] || [ -n "$modified_initscripts" ]; then
# Substitute these variables into a debconf template and display it
cat <<EOF
/etc/inittab:
$inittab_unusual_lines
Modified init scripts:
$modified_initscripts
EOF
fi
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