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1#!/bin/sh
2#
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3
4#set -e
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5#
6# This file understands the following apt configuration variables:
7#
8# "APT::Periodic::Update-Package-Lists=1"
9# - Do "apt-get update" automatically every n-days (0=disable)
10#
11# "APT::Periodic::Download-Upgradeable-Packages=0",
12# - Do "apt-get upgrade --download-only" every n-days (0=disable)
13#
14# "APT::Periodic::AutocleanInterval"
15# - Do "apt-get autoclean" every n-days (0=disable)
16#
17# "APT::Archives::MaxAge",
18# - Set maximum allowed age of a cache package file. If a cache
19# package file is older it is deleted (0=disable)
20#
21# "APT::Archives::MaxSize",
22# - Set maximum size of the cache in MB (0=disable). If the cache
23# is bigger, cached package files are deleted until the size
24# requirement is met (the biggest packages will be deleted
25# first).
26#
27# "APT::Archives::MinAge"
28# - Set minimum age of a package file. If a file is younger it
29# will not be deleted (0=disable). Usefull to prevent races
30# and to keep backups of the packages for emergency.
31#
0c132682 32
05f6a46a 33check_stamp()
0c132682 34{
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35 stamp="$1"
36 interval="$2"
37
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38 if [ $interval -eq 0 ]; then
39 return 1
40 fi
41
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42 if [ ! -f $stamp ]; then
43 return 0
0c132682 44 fi
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45
46 # compare midnight today to midnight the day the stamp was updated
47 stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
48 now=$(date --date=$(date --iso-8601) +%s)
49 delta=$(($now-$stamp))
05f6a46a 50
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51 # intervall is in days,
52 interval=$(($interval*60*60*24))
53 #echo "stampfile: $1"
54 #echo "interval=$interval, now=$now, stamp=$stamp, delta=$delta"
55
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56 if [ $delta -ge $interval ]; then
57 return 0
58 fi
59
60 return 1
61}
62
63update_stamp()
64{
65 stamp="$1"
66
67 touch $stamp
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68}
69
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70
71
72# we check here if autoclean was enough sizewise
2e8a92e5 73check_size_constraints()
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74{
75 # min-age in days
76 MaxAge=0
89eaeb44 77 MinAge=2
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78 MaxSize=0
79 CacheDir="var/cache/apt"
80 CacheArchive="archives/"
81 eval $(apt-config shell MaxAge APT::Archives::MaxAge)
8a139d4d 82 eval $(apt-config shell MinAge APT::Archives::MinAge)
6cce801a 83 eval $(apt-config shell MaxSize APT::Archives::MaxSize)
01717245 84 eval $(apt-config shell Dir Dir)
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85 eval $(apt-config shell CacheDir Dir::Cache)
86 eval $(apt-config shell CacheArchive Dir::Cache::archives)
87
88 # sanity check
89 if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
90 echo "empty Dir::Cache or Dir::Cache::archives, exiting"
91 exit
92 fi
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93
94 Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"
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95
96 # check age
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97 if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
98 find $Cache -name "*.deb" -mtime +$MaxAge -and -not -mtime -$MinAge -print0 | xargs -r -0 rm -f
99 elif [ ! $MaxAge -eq 0 ]; then
60ea46b2 100 find $Cache -name "*.deb" -mtime +$MaxAge -print0 | xargs -r -0 rm -f
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101 fi
102
103 # check size
104 if [ ! $MaxSize -eq 0 ]; then
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105 # maxSize is in MB
106 MaxSize=$(($MaxSize*1024))
107
108 #get current time
109 now=$(date --date=$(date --iso-8601) +%s)
110 MinAge=$(($MinAge*24*60*60))
111
6cce801a 112 # reverse-sort by mtime
3408b58c 113 for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
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114 du=$(du -s $Cache)
115 size=${du%%/*}
116 # check if the cache is small enough
117 if [ $size -lt $MaxSize ]; then
118 break
119 fi
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120
121 # check for MinAge of the file
122 if [ ! $MinAge -eq 0 ]; then
123 mtime=$(date --date=$(date -r $file --iso-8601) +%s)
124 delta=$(($now-$mtime))
125 #echo "$file ($delta), $MinAge"
126 if [ $delta -le $MinAge ]; then
127 #echo "Skiping $file (delta=$delta)"
3408b58c 128 break
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129 fi
130 fi
131
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132 # delete oldest file
133 rm -f $file
134 done
135 fi
136}
137
87ddfb96 138
0c132682 139UpdateInterval=0
05f6a46a 140DownloadUpgradeableInterval=0
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141eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
142AutocleanInterval=$DownloadUpgradeableInterval
143eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean)
0c132682 144
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145# laptop check, on_ac_power returns:
146# 0 (true) System is on mains power
147# 1 (false) System is not on mains power
148# 255 (false) Power status could not be determined
149# Desktop systems always return 255 it seems
2288cf77 150if which on_ac_power >/dev/null; then
05f6a46a 151 on_ac_power
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152 if [ $? -eq 1 ]; then
153 exit 0
154 fi
155fi
156
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157UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
158if check_stamp $UPDATE_STAMP $UpdateInterval; then
159 if apt-get -qq update 2>/dev/null; then
160 if which dbus-send >/dev/null; then
161 dbus-send --system / app.apt.dbus.updated boolean:true
162 fi
163 update_stamp $UPDATE_STAMP
164 fi
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165fi
166
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167DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
168if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
169 apt-get -qq -d dist-upgrade 2>/dev/null
170 update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
0c132682 171fi
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172
173AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
174if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
175 apt-get -qq autoclean
176 update_stamp $AUTOCLEAN_STAMP
177fi
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178
179# check cache size
180check_size_constraints