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1#!/bin/sh
2#
3
4#set -e
5
6check_stamp()
7{
8 stamp="$1"
9 interval="$2"
10
11 if [ ! -f $stamp ]; then
12 return 0
13 fi
14
15 # compare midnight today to midnight the day the stamp was updated
16 stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
17 now=$(date --date=$(date --iso-8601) +%s)
18 delta=$(($now-$stamp))
19 echo "stamp=$stamp, now=$now, delta=$delta"
20
21 if [ $delta -ge $interval ]; then
22 return 0
23 fi
24
25 return 1
26}
27
28update_stamp()
29{
30 stamp="$1"
31
32 touch $stamp
33}
34
35UpdateInterval=0
36DownloadUpgradeableInterval=0
37RES=`apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages`
38eval $RES
39
40# laptop check, on_ac_power returns:
41# 0 (true) System is on mains power
42# 1 (false) System is not on mains power
43# 255 (false) Power status could not be determined
44# Desktop systems always return 255 it seems
45if which on_ac_power >/dev/null; then
46 on_ac_power
47 if [ $? -eq 1 ]; then
48 exit 0
49 fi
50fi
51
52UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
53if check_stamp $UPDATE_STAMP $UpdateInterval; then
54 if apt-get -qq update 2>/dev/null; then
55 if which dbus-send >/dev/null; then
56 dbus-send --system / app.apt.dbus.updated boolean:true
57 fi
58 update_stamp $UPDATE_STAMP
59 fi
60fi
61
62DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
63if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
64 apt-get -qq -d dist-upgrade 2>/dev/null
65 update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
66fi