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