unattended-upgrade in /etc/network/if-up.d

[Leander Jedamus]

Hi!

I wrote a simple script for unattended-upgrade, which is run when an
interface (except loopback) is coming up.
It is modified from ntpdate in the same directory (/etc/network/if-up.d/).
Here it is:
----8<----8<----8<----8<----8<----8<----8<----
#!/bin/sh

# written by Leander Jedamus 24.09.2012

PATH=/sbin:/bin:/usr/sbin:/usr/bin
export PATH

# gives me German messages
LANG=de_DE.utf8
export LANG

SCRIPTNAME=unattended-upgrade
PROGRAMPATH=/usr/bin
PROGRAMNAME1=apt-get
PROGRAMNAME2=unattended-upgrade
PROGRAM1=$PROGRAMPATH/$PROGRAMNAME1
PROGRAM2=$PROGRAMPATH/$PROGRAMNAME2

if [ "$METHOD" = loopback ]; then
    exit 0
fi

# Check whether unattended-upgrade was removed but not purged; it's
useless to
# wait for it in that case.
if [ ! -x $PROGRAM1 ] && [ -d $PROGRAMPATH ]; then
    exit 0
fi
if [ ! -x $PROGRAM2 ] && [ -d $PROGRAMPATH ]; then
    exit 0
fi

(

# This is for the case that /usr will be mounted later.
if [ -r /lib/udev/hotplug.functions ]; then
    . /lib/udev/hotplug.functions
    wait_for_file $PROGRAM1
    wait_for_file $PROGRAM2
fi

LOCKFILE=/var/lock/$SCRIPTNAME-ifup

# Avoid running more than one at a time
if [ -x /usr/bin/lockfile-create ]; then
    lockfile-create $LOCKFILE
    lockfile-touch $LOCKFILE &
    LOCKTOUCHPID="$!"
fi

# invoke-rc.d --quiet ntp stop >/dev/null 2>&1 || true

# run update again, when return code is not 0
RETCODE=1
while [ $RETCODE != 0 ]; do
  $PROGRAM1 update 2>/dev/null >/dev/null && RETCODE=0
done

$PROGRAM2

# invoke-rc.d --quiet ntp start >/dev/null 2>&1 || true

if [ -x /usr/bin/lockfile-create ] ; then
    kill $LOCKTOUCHPID
    lockfile-remove $LOCKFILE
fi

) &
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This script will run apt-get install as root until it succeeds running
and then will run unattended-upgrade.
Logfile is in /var/log/unattended-upgrades/unattended-upgrades.log

I also wrote to the author of unattended-upgrade, but he has not
answered me for a week or so.

Perhaps somebody else can use it.

Greetings
Leander Jedamus