~ubuntu-core-dev/update-notifier/ubuntu

#!/bin/sh -e

#

# helper for update-motd

# poor mans force

if [ "$1" = "--force" ]; then

    NEED_EOL_CHECK=yes

else

    NEED_EOL_CHECK=no

fi

# check time when we did the last update check

stamp="/var/lib/update-notifier/hwe-eol"

# get list dir

StateDir="/var/lib/apt/"

ListDir="lists/"

eval "$(apt-config shell StateDir Dir::State)"

eval "$(apt-config shell ListDir Dir::State::Lists)"

# get dpkg status file

DpkgStatus="/var/lib/dpkg/status"

eval "$(apt-config shell DpkgStatus Dir::State::status)"

# get sources.list file

EtcDir="etc/apt/"

SourceList="sources.list"

eval "$(apt-config shell EtcDir Dir::Etc)"

eval "$(apt-config shell SourceList Dir::Etc::sourcelist)"

# let the actual update be asynchronous to avoid stalling apt-get

cleanup() { rm -f "$tmpfile"; }

# check if we have a list file or sources.list that needs checking

if [ -e "$stamp" ]; then

    if [ "$(find "/$StateDir/$ListDir" "/$EtcDir/$SourceList" "/$DpkgStatus" -type f -newer "$stamp" -print -quit)" ]; then

        NEED_EOL_CHECK=yes

    fi

else

    if [ "$(find "/$StateDir/$ListDir" "/$EtcDir/$SourceList" -type f -print -quit)" ]; then

        NEED_EOL_CHECK=yes

    fi

fi

tmpfile=""

trap cleanup EXIT

tmpfile=$(mktemp -p $(dirname "$stamp"))

# output something for update-motd

if [ "$NEED_EOL_CHECK" = "yes" ]; then

    {

        # the script may exit with status 10 when a HWE update is needed

        /usr/bin/hwe-support-status || true

    } > "$tmpfile"

    mv "$tmpfile" "$stamp"

fi

# output what we have (either cached or newly generated)

cat "$stamp"