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#!/bin/sh
#
#set -e
check_stamp()
{
stamp="$1"
interval="$2"
if [ $interval -eq 0 ]; then
return 1
fi
if [ ! -f $stamp ]; then
return 0
fi
# compare midnight today to midnight the day the stamp was updated
stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
now=$(date --date=$(date --iso-8601) +%s)
delta=$(($now-$stamp))
if [ $delta -ge $interval ]; then
return 0
fi
return 1
}
update_stamp()
{
stamp="$1"
touch $stamp
}
UpdateInterval=0
DownloadUpgradeableInterval=0
eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
AutocleanInterval=$DownloadUpgradeableInterval
eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean)
# 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 which on_ac_power >/dev/null; then
on_ac_power
if [ $? -eq 1 ]; then
exit 0
fi
fi
UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
if check_stamp $UPDATE_STAMP $UpdateInterval; then
if apt-get -qq update 2>/dev/null; then
if which dbus-send >/dev/null; then
dbus-send --system / app.apt.dbus.updated boolean:true
fi
update_stamp $UPDATE_STAMP
fi
fi
DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
apt-get -qq -d dist-upgrade 2>/dev/null
update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
fi
AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
apt-get -qq autoclean
update_stamp $AUTOCLEAN_STAMP
fi
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