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#!/bin/sh
#
# cron job for apt-get update
#
# Update-Package-Intervall is in days
#
STAMP=/var/lib/apt/update-stamp
#set -e
do_update()
{
touch $STAMP.new
if apt-get update -qq; then
if [ -x /usr/bin/dbus-send ]; then
dbus-send --system / app.apt.dbus.updated boolean:true
fi
mv $STAMP.new $STAMP
fi
rm -f $STAMP.new
}
UpdateInterval=0
RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists`
eval $RES
if [ $UpdateInterval -eq 0 ]; then
exit 0
fi
# laptop check, on_ac_power returns:
# 0 (true) System is on mains power
# 1 (false) System is not on mains power
# 255 (false) Power status could not be determined
# Desktop systems always return 255 it seems
if [ -x /usr/bin/on_ac_power ]; then
/usr/bin/on_ac_power
if [ $? -eq 1 ]; then
exit 0
fi
fi
if [ ! -f $STAMP ]; then
do_update
exit 0
fi
LastUpdate=`stat -c "%Y" $STAMP 2>/dev/null`
Now=`date +%s`
NeedUpdate=$(($LastUpdate+$UpdateInterval*3600*24))
if [ $NeedUpdate -le $Now ]; then
do_update
fi
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