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- #!/bin/sh -e
- #
- # 91-release-upgrade - display upgrade message or update the cache
- # in the background
- #
- # Copyright (C) 2010 Canonical Ltd.
- #
- # Authors: Dustin Kirkland <kirkland@canonical.com>
- #
- # This program is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation, version 3 of the License.
- #
- # This program is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with this program. If not, see <http://www.gnu.org/licenses/>.
- stamp=/var/lib/ubuntu-release-upgrader/release-upgrade-available
- if [ -f "$stamp" ]; then
- # Stamp exists, see if it's expired
- now=$(date +%s)
- lastrun=$(stat -c %Y "$stamp") 2>/dev/null || lastrun=0
- expiration=$(expr $lastrun + 86400)
- if [ $now -ge $expiration ]; then
- # Older than 1 day old, so update in the background
- /usr/lib/ubuntu-release-upgrader/check-new-release -q > "$stamp" &
- elif [ -s "$stamp" ]; then
- # Less than 1 day old, and non-empty, so display now
- cat "$stamp"
- echo
- fi
- elif [ "$(id -u)" = 0 ]; then
- # No cache at all, so update in the background
- /usr/lib/ubuntu-release-upgrader/check-new-release -q > "$stamp" &
- fi
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