Elep

#!/bin/sh

UA=${UA:-"/usr/bin/ubuntu-advantage"}
UA_STATUS_CACHE=${UA_STATUS_CACHE:-"/var/cache/ubuntu-advantage-tools/ubuntu-advantage-status.cache"}

[ -x "$UA" ] || exit 0

print_patch_state() {
    local patch_state="$1"

case "$patch_state" in
        unapplied)
            echo "Patches are available, will be deployed shortly."
            ;;
        applied)
            echo "All available patches applied."
            ;;
        applied-with-bug|apply-failed)
            echo "Live patching failed, please run \`ubuntu-bug linux\` to report a bug."
            ;;
        nothing-to-apply)
            echo "All available patches applied."
            ;;
        applying)
            echo "Live patching currently in progress."
            ;;
        *)
            echo "Unknown patch status. Please see /var/log/syslog for more information."
            echo "     Status: \"$patch_state\""
            ;;
    esac
}

print_status() {
    local check_state="$1"
    local patch_state="$2"

echo -n "   - "
    case "$check_state" in
        needs-check)
            echo "Regular server check is pending."
            ;;
        check-failed)
            echo "Livepatch server check failed."
            echo "     Please see /var/log/syslog for more information."
            ;;
        checked)
            print_patch_state "$patch_state"
            ;;
        *)
            echo "Unknown check status. Please see /var/log/syslog for more information."
            echo "     Status: \"$check_state\""
            ;;
    esac
}

service_name="livepatch"
# if there is no cache file yet (the cron job hasn't run yet), bail
[ -s "$UA_STATUS_CACHE" ] || exit 0
ua_status=$(cat "$UA_STATUS_CACHE")
# if there is no livepatch section at all in the output, silently
# bail
has_livepatch=$(echo "${ua_status}" | grep "^${service_name}")
[ -n "${has_livepatch}" ] || exit 0
livepatch_status=$(echo "$ua_status"|grep ^${service_name}:|sed -r -n "s,^${service_name}: (.*)$,\\1,p")
# only look for patchState and checkState inside the specific service
# block in the status output
patch_state=$(echo "$ua_status"|sed -r -n "/^${service_name}:/,/^\\S/s,^[[:blank:]]+patchState: (.*)$,\\1,p")
check_state=$(echo "$ua_status"|sed -r -n "/^${service_name}:/,/^\\S/s,^[[:blank:]]+checkState: (.*)$,\\1,p")

case "$livepatch_status" in
    "disabled (not available)")
        # do nothing
        ;;
    "enabled")
        echo
        echo " * Canonical Livepatch is enabled."
        print_status "${check_state}" "${patch_state}"
        ;;
    "disabled")
        echo
        echo " * Canonical Livepatch is available for installation."
        echo "   - Reduce system reboots and improve kernel security. Activate at:"
        echo "     https://ubuntu.com/livepatch"
        ;;
    *)
        echo
        echo " * Canonical Livepatch is in an unknown state."
        echo "   - Please see /var/log/syslog for more information."
        echo "     Status: \"$livepatch_status\""
        ;;
esac